Skocz do pozycji: 1.

Tytuł:

Research on the maritime logistics pricing model of risk-averse retailer-dominated dual-channel supply chain

Autorzy:

Fang, Q.
Tong, Z.
Ren, L.
Liu, A.

Powiązania:

https://bibliotekanauki.pl/articles/258648.pdf

Data publikacji:

2018

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

dual channel
risk-averse
retailer-dominated
supply chain

Opis:

Price decision is studied in a risk-averse retailer-dominated dual-channel supply chain, which consisting of one manufacturers and one retailer with both off-line and on-line channels. Firstly, two mean-variance models in centralized and decentralized supply chain are established. Secondly, the optimal solutions under the two decision modes are compared and analyzed. The results shows that the price of dual-channel of retailer decreased with the increase of retailers’ risk- aversion coefficient and the standard deviation of the fluctuation of market demand, while the wholesale price changes is on the contrary; in addition, when the market demand is greater than a certain value, the prices of dual channel are correspondingly higher in decentralized supply chain than in centralized supply chain, and vice versa. In addition, when the retailer’s risk aversion is in a certain interval, the expected utility of the whole supply chain is greater in centralized supply chain than in decentralized decision, and vice versa. Finally, a numerical example is given to verify the above conclusions.

Źródło:

Polish Maritime Research; 2018, S 2; 107-116
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 2.

Tytuł:

Synergistic effect of a mixture of dodecylamine and kerosene on separation of magnetite ore

Autorzy:

Liu, A.
Fan, M.-Q.
Li, Z.-H.

Powiązania:

https://bibliotekanauki.pl/articles/109849.pdf

Data publikacji:

2016

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

DDA-kerosene
magnetite ore
quartz
flotation

Opis:

In this study, it was discovered that a mixture of dodecylamine (DDA)-kerosene demonstrated a stronger collecting ability for pure quartz and higher selectivity for magnetite ore. The relationship between the DDA-kerosene composition and mineral flotation performance on reverse flotation of magnetite ore was investigated. The results showed that floatability of the floating material increased when the DDA consumption increased. Specifically, during flotation, the fine particles (-0.074 mm fraction) selectively floated with DDA-kerosene. The difficult to float coarser particles (+0.074 mm fraction) with high content of quartz, required higher DDA dosage. However, higher DDA input during the flotation process did not necessarily yield better outcomes. The best results were obtained for 40/60 amine-to-oil ratio, as the quartz floated markedly with smaller magnetite loss and the flotation behavior was superior to pure DDA. Magnetite concentrates with 1.83% SiO2 and 71.04% Fe were produced using 120 g/Mg of DDA-kerosene (WDDA=40%).

Źródło:

Physicochemical Problems of Mineral Processing; 2016, 52, 2; 647-661
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 3.

Tytuł:

Fabrication, Structural Characterization and Optical Properties of the Flower-Like ZnO Nanowires

Autorzy:

Feng, L.
Liu, A.
Ma, Y.
Liu, M.
Man, B.

Powiązania:

https://bibliotekanauki.pl/articles/1538755.pdf

Data publikacji:

2010-03

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

81.07.Bc
81.05.Dz
81.10.Aj

Opis:

Multipod flower-like zinc oxide (ZnO) nanowires have been successfully synthesized on Si(111) substrates using a pulsed laser deposition prepared Zn film as "self-catalyst" by the simple thermal evaporation oxidation of the metallic zinc powder at 850°C without any other catalysts or additives. The pre-deposited Zn films by pulsed laser deposition on the substrates can promote the formation of the ZnO nuclei effectively. Also it can further advance the growth of the flower-like ZnO nanowires accordingly. X-ray diffraction, scanning electron microscope, high-resolution transmission electron microscopy, Fourier transform infrared spectrum, and photoluminescence were used to analyze the structure, morphology, composition and optical properties of the as-synthesized products. The results demonstrate that the nanowires were single crystalline with hexagonal wurzite structure, grown along the [0001] in the c-axis direction. Room temperature photoluminescence spectrum of the ZnO nanowires shows a nearband-edge ultraviolet emission (peak at ≈ 384 nm) and a deep-level green emission (peak at ≈ 513 nm). In addition, the growth mechanism of the flower-like ZnO nanowires is discussed in detail.

Źródło:

Acta Physica Polonica A; 2010, 117, 3; 512-517
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 4.

Tytuł:

Study of Cotton Matured Fibre Quality and the Super-Molecular Structure in Upland Cotton RILs
Analiza jakości dojrzałych włókien bawełny Upland i jej struktury nadcząsteczkowej

Autorzy:

Wang, Y.
Li, C
Shang, H
Li, B
Liu, A
Yuan, Y

Powiązania:

https://bibliotekanauki.pl/articles/231848.pdf

Data publikacji:

2014

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych

Tematy:

upland cotton
recombinant inbred lines
fibre super-molecular structure
fibre quality
dojrzałe włókna bawełny
bawełna Upland
zmodyfikowana genetycznie bawełna
cechy włókniste bawełny
super-molekularna struktura włókien
jakość włókna

Opis:

A RIL(recombinant inbred lines) population with 196 F6:9 lines was developed from an F2 population of upland cotton (Gossypium hirsutum L.) cross of sGK9708×0-153. sGK9708 is a commercial transgenic variety with Bt+CpTI genes resistant to budworm and 0-153 with high fibre quality. Five materials with high fibre strength and five materials with low fibre strength from the recombinant inbred lines were researched [1]. Ten materials of super-molecular structure and fibre quality were studied by X-ray diffraction and the HVI900 technique. The results indicated that cotton matured fibre quality should mainly depend on the decrease in the orientational parameter in the crystalline section, especially the orientational separate and orientational distribution angles. The correlation of fibre maturity, linear density and the fibre super-molecular structure is an innovation in the study. Studies on the correlation of cotton fibre quality and the fibre super-molecular structure provide a scientific basis for the improvement cotton fibre quality.
Artykuł dotyczy badań jakości dojrzałych włókien bawełny amerykańskiej Upland i jej struktury nadcząsteczkowej. Uzyskano zmodyfikowany genetycznie gatunek bawełny amerykańskiej Upland za pośrednictwem sztucznego samozapylenia bawełny wykazującej cechy włókniste (linii wsobnej). Dla uzyskanych w opisany sposób włókien bawełny przeprowadzono wszechstronne badania właściwości fizycznych, a także struktury nadcząsteczkowej. Uzyskane wyniki badań skonfrontowano z właściwościami fizycznymi i strukturą nadczasteczkową tradycyjnej bawełny amerykańskiej Upland posiłkując się w tym celu analizą korelacyjną.

Źródło:

Fibres & Textiles in Eastern Europe; 2014, 5 (107); 28-33
1230-3666
2300-7354

Pojawia się w:

Fibres & Textiles in Eastern Europe

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 5.

Tytuł:

Water-exit process modeling and added-mass calculation of the submarine-launched missile

Autorzy:

Yang, J.
Feng, J.
Li, Y.
Liu, A.
Hu, J.
Ma, Z.

Powiązania:

https://bibliotekanauki.pl/articles/260251.pdf

Data publikacji:

2017

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

submarine-launched missile
fluid-structure interaction
water-exit dynamic model
time-varying added-mass
numerical simulation

Opis:

In the process that the submarine-launched missile exits the water, there is the complex fluid solid coupling phenomenon. Therefore, it is difficult to establish the accurate water-exit dynamic model. In the paper, according to the characteristics of the water-exit motion, based on the traditional method of added mass, considering the added mass changing rate, the water-exit dynamic model is established. And with help of the CFX fluid simulation software, a new calculation method of the added mass that is suit for submarine-launched missile is proposed, which can effectively solve the problem of fluid solid coupling in modeling process. Then by the new calculation method, the change law of the added mass in water-exit process of the missile is obtained. In simulated analysis, for the water-exit process of the missile, by comparing the results of the numerical simulation and the calculation of theoretical model, the effectiveness of the new added mass calculation method and the accuracy of the water-exit dynamic model that considers the added mass changing rate are verified.

Źródło:

Polish Maritime Research; 2017, S 3; 152-164
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 6.

Tytuł:

Stability control of propeller Autonomous Underwater Vehicle based on combined sections method

Autorzy:

Qi, D.
Feng, J.
Liu, A.
Hu, J.
Xu, H.
Li, Y.
Ashraf, M. A.

Powiązania:

https://bibliotekanauki.pl/articles/259119.pdf

Data publikacji:

2015

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

propeller AUV
dynamic model
stability control
simulation

Opis:

Learning from the motion principle of quadrotor, a symmetric propeller AUV, which has small size and low velocity is designed. Compared with the AUV equipped with rudders, it has better maneuverability and manipulation at low velocity. According to the Newton-Euler method, the 6 DOF kinematic model and dynamic model of the propeller AUV are established. A stability controller that consists of 3 different PID controllers is designed. It makes the depth and attitude angle as trigger conditions, and the relevant controller is chosen in different moving process. The simulation experiments simulate ideal motion state and disturbed motion state, and experiments results show that the stability controller based on combined sections method can make the best of mature technology of PID, and meet the control requirements in different stages. It has a higher respond speed and accuracy, improving the stability of the propeller AUV under the disturbance of complex ocean currents.

Źródło:

Polish Maritime Research; 2015, S 1; 157-162
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 7.

Tytuł:

Comprehensive surveillance of the antibody response to Borrelia burgdorferi s.l. in small ruminants in China

Autorzy:

Yang, J.
Liu, Z.
Guan, G.
Li, Y.
Chen, Z.
Ma, M.
Liu, A.
Ren, Q.
Wang, J.
Luo, J.
Yin, H.

Powiązania:

https://bibliotekanauki.pl/articles/49708.pdf

Data publikacji:

2015

Wydawca:

Instytut Medycyny Wsi

Źródło:

Annals of Agricultural and Environmental Medicine; 2015, 22, 2
1232-1966

Pojawia się w:

Annals of Agricultural and Environmental Medicine

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 8.

Tytuł:

Strong convergence theorem of a hybrid projection algorithm for a family of quasi-φ-asymptotically nonexpansive mappings

Autorzy:

Tang, J. F.
Chang, S. S.
Liu, M.
Liu, J. A.

Powiązania:

https://bibliotekanauki.pl/articles/255543.pdf

Data publikacji:

2010

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

quasi-phi-asymptotically nonexpansive mapping
asymptotically regular mapping
hybrid projection iterative algorithm
strong convergence theorem

Opis:

The main purpose of this paper is by using a new hybrid projection iterative algorithm to prove some strong convergence theorems for a family of quasi-φ-asymptotically nonexpansive mappings. The results presented in the paper improve and extend the corresponding results announced by some authors.

Źródło:

Opuscula Mathematica; 2010, 30, 3; 341-348
1232-9274
2300-6919

Pojawia się w:

Opuscula Mathematica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 9.

Tytuł:

Feudal Internationalism? Foreign Policy of the People’s Republic of China: See China Change From Back Then to Now to What Next?
Feudalny internacjonalizm? Polityka zagraniczna Chińskiej Republiki Ludowej: obraz Chin z przeszłości, spojrzenie na teraźniejszość i prognozy na przyszłość

Autorzy:

Liu, Hanzhen
Jones, David A.

Powiązania:

https://bibliotekanauki.pl/articles/439947.pdf

Data publikacji:

2018

Wydawca:

Akademia Finansów i Biznesu Vistula

Tematy:

China
“feudal internationalism”
foreign policy
OBOR
Silk Road
Silk Route
Chiny
"feudalny internacjonalizm”
polityka zagraniczna
Jedwabny Szlak.

Opis:

Sovereign territory that is called the People’s Republic of China at present has existed for some 5,000 years or longer across several dozen dynasties, several periods ruled by “warlords,” at least two Republics including the current People’s Republic of China. Over such a long time period, “China” has changed remarkably, evidenced by revisions in its language, arrival then departure of various forms of governance and leaders, prosperity during the Ming Dynasty, poverty from the “Great Leap Forward” of the 1950s through the “Cultural Revolution” of the 1960s and 1970s, to the present period the authors have termed “feudal internationalism.” This article will focus on China’s changing foreign policies: from the dynastic periods, across the post-dynastic Ming Guo period (1911-1927), to the Republic of China period controlled by the Chinese Nationalist Party (Guomingtang), (1927- 1949), to the People’s Republic of China controlled by the Chinese Communist Party (Gongchantang) that has changed its own foreign policies several times since taking power in 1949, mostly during or since China’s “opening” to the West during the administration of Deng Xiaoping as China’s “paramount leader” (1978-1989) that ushered in “four modernizations”, the third of which upgraded China’s national defense. Changes in China’s foreign policy have continued under its current president, Xi Jinping, most noticeably with China’s “One Belt, One Road” initiative that involves building infrastructure across Eurasia and Africa at the cost of billions of dollars estimated to turn into trillions of dollars as China endeavors to resurrect then put to new uses the ancient “Silk Road” overland plus the maritime “Silk Route” with cutting edge airports, highways, railways, seaports needed to connect China with raw materials including energy sources from Africa and consumer markets in Europe.
Suwerenne terytorium nazywane obecnie Chińską Republiką Ludową istnieje od ponad 5000 lat. W tym czasie doświadczyło rządów kilkudziesięciu dynastii, kilku gubernatorów wojskowych i przynajmniej dwóch republik, w tym Chińskiej Republiki Ludowej. W tak długim okresie Chiny przeszły olbrzymie zmiany, co miało swoje odzwierciedlenie w zmianach języka, przyjmowaniu i odrzucaniu różnych form rządów i przywódców, czasach dobrobytu za panowania Dynastii Ming, biedy spowodowanej „Wielkim skokiem” w latach 50. XX wieku i „Rewolucją kulturalną” lat 60. i 70. XX wieku, aż po obecny okres, który autorzy nazywają „feudalnym internacjonalizmem”. Praca poświęcona jest zmianom polityki zagranicznej Chin: od okresów dynastycznych, przez post-dynastyczny okres Ming Guo (1911-1927), Republikę Chińską kontrolowaną przez Chińską Partię Narodową (Guomingtang), (1927-1949), po Chińską Republikę Ludową pod przywództwem Chińskiej Partii Komunistycznej (Gongchantang). Po przejęciu władzy w 1949 r., Chińska Partia Komunistyczna wielokrotnie zmieniała swoją politykę zagraniczą, głównie od momentu lub podczas „otwierania się” Chin na Zachód za czasów administracji Deng Xiaopinga jako „najwyższego przywódcy” Chin (1978-1989), który rozpoczął „cztery modernizacje” (z których trzecia zmodernizowała chińskie siły obronne). Zmiany w chińskiej polityce zagranicznej miały swój dalszy ciąg pod przywództwem jej obecnego prezydenta, Xi Jinpinga, szczególnie w postaci inicjatywy „Jeden pas, jedna droga”, która pociągała za sobą stworzenie infrastruktury w całej Eurazji i Afryce. Inwestycja warta miliardy dolarów, które mogą urosnąć do trylionów, jest próbą wskrzeszenia starożytnego „Jedwabnego Szlaku” wiodącego zarówno przez ląd, jak i trasy morskie, zaopatrzone w najbardziej zaawansowane technologicznie lotniska, autostrady, koleje i porty morskie, mające dać Chinom dostęp do surowców naturalnych, źródeł energii z Afryki oraz rynków konsumenckich w Europie.

Źródło:

Kwartalnik Naukowy Uczelni Vistula; 2018, 1(55); 21-40
2084-4689

Pojawia się w:

Kwartalnik Naukowy Uczelni Vistula

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 10.

Tytuł:

Mask face inpainting based on improved generative adversarial network

Autorzy:

Liu, Qingyu
Juanatas, Roben A.

Powiązania:

https://bibliotekanauki.pl/articles/30148248.pdf

Data publikacji:

2023

Wydawca:

Polskie Towarzystwo Promocji Wiedzy

Tematy:

face inpainting
generative adversarial network
residual network
attention mechanism

Opis:

Face recognition technology has been widely used in all aspects of people's lives. However, the accuracy of face recognition is greatly reduced due to the obscuring of objects, such as masks and sunglasses. Wearing masks in public has been a crucial approach to preventing illness, especially since the Covid-19 outbreak. This poses challenges to applications such as face recognition. Therefore, the removal of masks via image inpainting has become a hot topic in the field of computer vision. Deep learning-based image inpainting techniques have taken observable results, but the restored images still have problems such as blurring and inconsistency. To address such problems, this paper proposes an improved inpainting model based on generative adversarial network: the model adds attention mechanisms to the sampling module based on pix2pix network; the residual module is improved by adding convolutional branches. The improved inpainting model can not only effectively restore faces obscured by face masks, but also realize the inpainting of randomly obscured images of human faces. To further validate the generality of the inpainting model, tests are conducted on the datasets of CelebA, Paris Street and Place2, and the experimental results show that both SSIM and PSNR have improved significantly.

Źródło:

Applied Computer Science; 2023, 19, 2; 25-42
1895-3735
2353-6977

Pojawia się w:

Applied Computer Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 11.

Tytuł:

Robotic rehabilitation of stroke patients using an expert system

Autorzy:

Natarajan, P.
Agah, A.
Liu, W.

Powiązania:

https://bibliotekanauki.pl/articles/384968.pdf

Data publikacji:

2011

Wydawca:

Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów

Tematy:

rehabilitation robots
intelligent systems
human-robot interaction
expert systems
stroke therapy

Opis:

Approximately 50 to 60 percent of the more than five million stroke survivors are moderately or minimally impaired, and may greatly benefit from rehabilitation. There is a strong need for cost-effective, long-term rehabilitation solutions, which require the therapists to provide repetitive movements to the affected limb. This is a suitable task for specialized robotic devices; however, with the few commercially available robots, the therapists are required to spend a considerable amount of time programming the robot, monitoring the patients, analyzing the data from the robot, and assessing the progress of the patients. This paper focuses on the design, development, and clinically testing an expert systembased post-stroke robotic rehabilitation system for hemiparetic arm. The results suggest that it is not necessary for a therapist to continuously monitor a stroke patient during robotic training. Given the proper intelligent tools for a rehabilitation robot, cost-effective long-term therapy can be delivered with minimal supervision.

Źródło:

Journal of Automation Mobile Robotics and Intelligent Systems; 2011, 5, 1; 47-57
1897-8649
2080-2145

Pojawia się w:

Journal of Automation Mobile Robotics and Intelligent Systems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 12.

Tytuł:

Investigation and optimization of use of anionic collectors in direct flotation of bauxite ores

Autorzy:

Liu, C.
Feng, A.
Guo, Z.

Powiązania:

https://bibliotekanauki.pl/articles/110801.pdf

Data publikacji:

2016

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

bauxite
collector
direct flotation

Opis:

Bauxite is the main raw material for the alumina industry. Direct flotation is the most widely used method for bauxite beneficiation. In this study, a large number of direct flotation tests were carried out using several anionic reagents. The testing concluded that vegetable oil acid (VOA), naphthenic acid (NA) and lauryl polyoxyethylene phosphate (AEP12) were the three outstanding collectors for bauxite direct flotation. ZMC collector was mixed and prepared using VOA, NA and AEP12, in which the mass ratio of VOA, NA and AEP12 was 1:1:0.5. When processing the bauxite ores of the mass ratio of Al2O3 to SiO2 (A/S) = 4.99, the A/S of the final concentrate was 7.08 and the recovery of Al2O3 was 90.22%. When processing ores of A/S = 4.5, the A/S of the final concentrate was 7.04 and the recovery of Al2O3 was 92.16%. Thus, it can be seen that properties and behaviors of the ZMC reagent were remarkable and met the demands of the “Lime-Bayer Process”.

Źródło:

Physicochemical Problems of Mineral Processing; 2016, 52, 2; 932-942
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 13.

Tytuł:

Rule based networks : an efficient and interpretable representation of computational models

Autorzy:

Liu, H.
Gegov, A.
Cocea, M.

Powiązania:

https://bibliotekanauki.pl/articles/91698.pdf

Data publikacji:

2017

Wydawca:

Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych

Tematy:

rule based networks
knowledge discovery
predictive modelling
rule representation

Opis:

Due to the vast and rapid increase in the size of data, data mining has been an increasingly important tool for the purpose of knowledge discovery to prevent the presence of rich data but poor knowledge. In this context, machine learning can be seen as a powerful approach to achieve intelligent data mining. In practice, machine learning is also an intelligent approach for predictive modelling. Rule learning methods, a special type of machine learning methods, can be used to build a rule based system as a special type of expert systems for both knowledge discovery and predictive modelling. A rule based system may be represented through different structures. The techniques for representing rules are known as rule representation, which is significant for knowledge discovery in relation to the interpretability of the model, as well as for predictive modelling with regard to efficiency in predicting unseen instances. This paper justifies the significance of rule representation and presents several existing representation techniques. Two types of novel networked topologies for rule representation are developed against existing techniques. This paper also includes complexity analysis of the networked topologies in order to show their advantages comparing with the existing techniques in terms of model interpretability and computational efficiency.

Źródło:

Journal of Artificial Intelligence and Soft Computing Research; 2017, 7, 2; 111-123
2083-2567
2449-6499

Pojawia się w:

Journal of Artificial Intelligence and Soft Computing Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 14.

Tytuł:

Enhancement of Drilling Safety and Quality Using Online Sensors and Artificial Neural Networks

Autorzy:

Liu, T.- I.
Kumagai, A.
Lee, C.

Powiązania:

https://bibliotekanauki.pl/articles/90529.pdf

Data publikacji:

2003

Wydawca:

Centralny Instytut Ochrony Pracy

Tematy:

drilling safety
online sensors
artificial neural networks
bezpieczeństwo pracy
ocena ryzyka zawodowego
wiertnictwo
sieci neuronowe

Opis:

Cutting force sensors and neural networks have been used for the occupational safety of the drilling process. The drill conditions have been online classified into 3 categories: safe, caution, and danger. This approach can change the drill just before its failure. The inputs to neural networks include drill size, feed rate, spindle speed, and features that were extracted from drilling force measure-ments. The outputs indicate the safety states. This detection system can reach a success rate of over 95%. Furthermore, the one misclassification during online tests was a one-step ahead pre-alarm that is acceptable from the safety and quality viewpoint. The developed online detection system is very robust and can be used in very complex manufacturing environments.

Źródło:

International Journal of Occupational Safety and Ergonomics; 2003, 9, 1; 37-56
1080-3548

Pojawia się w:

International Journal of Occupational Safety and Ergonomics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 15.

Tytuł:

Analysis of Postural Load During Tasks Related to Milking Cows—A Case Study

Autorzy:

Groborz, A.
Tokarski, T.
Roman-Liu, D.

Powiązania:

https://bibliotekanauki.pl/articles/90722.pdf

Data publikacji:

2011

Wydawca:

Centralny Instytut Ochrony Pracy

Tematy:

postural load
milking cows
case study

Opis:

The aim of this study was to analyse postural load during tasks related to milking cows of 2 farmers on 2 different farms (one with a manual milk transport system, the other with a fully automated milk transport system) as a case study. The participants were full-time farmers, they were both healthy and experienced in their job. The Ovako Working Posture Analyzing System (OWAS) was used to evaluate postural load and postural risk. Postural load was medium for the farmer on the farm with a manual milk transport system and high for the farmer working on the farm with a fully automated milk transport system. Thus, it can be concluded that a higher level of farm mechanization not always mean that the farmer’s postural load is lower, but limitation of OWAS should be considered.

Źródło:

International Journal of Occupational Safety and Ergonomics; 2011, 17, 4; 423-432
1080-3548

Pojawia się w:

International Journal of Occupational Safety and Ergonomics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 16.

Tytuł:

Automatic graph cut based segmentation of retinal optic disc by incorporating blood vessel compensation

Autorzy:

Salazar-Gonzalez, A.
Li, Y
Liu, X.

Powiązania:

https://bibliotekanauki.pl/articles/91826.pdf

Data publikacji:

2012

Wydawca:

Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych

Tematy:

graph cut
retinal optic disc
glaucoma
blindness
retinal screening
segmentation
blood vessel
graph cut technique
DIARETDB1
DRIVE

Opis:

Glaucoma is one of the main causes of blindness worldwide. Periodical retinal screening is highly recommended in order to detect any sign of the disease and apply the appropriated treatment. Different systems for the analysis of retinal images have been designed in order to assist this process. The segmentation of the optic disc is an important step in the development of a retinal screening system. In this paper we present an unsupervised method for the segmentation of the optic disc. The main obstruction in the optic disc segmentation process is the presence of blood vessels breaking the continuity of the object. While many other methods have addressed this problem trying to eliminate the vessels, we have incorporated the blood vessel information into our formulation. The blood vessels inside of the optic disc are used to give continuity to the object to segment. Our approach is based on the graph cut technique, where the graph is constructed by considering the relationship between neighbouring pixels and by the likelihood of them belonging to the foreground and background from prior information. Our method was tested on two public datasets, DIARETDB1 and DRIVE. The performance of our method was measured by calculating the overlapping ratio (Oratio), sensitivity and the mean absolute distance (MAD) with respect to the manually labeled images.

Źródło:

Journal of Artificial Intelligence and Soft Computing Research; 2012, 2, 3; 235-245
2083-2567
2449-6499

Pojawia się w:

Journal of Artificial Intelligence and Soft Computing Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 17.

Tytuł:

Practical Application of Ergonomic Settings of Typical Computerised Workstations

Autorzy:

Tokarski, T.
Liu, D.
Kamińska, J.
Wolska, A.

Powiązania:

https://bibliotekanauki.pl/articles/91119.pdf

Data publikacji:

2000

Wydawca:

Centralny Instytut Ochrony Pracy

Tematy:

computerised workstations
ergonomic settings
lighting
ergonomia
komputerowe stanowisko pracy
oświetlenie

Opis:

The goal of the study was to check, with regard to ergonomics, workstations equipped with visual display terminals in selected enterprises. Over 180 workstations were tested in 3 enterprises. Most workstations were equipped with computers. The ergonomics of both the parameters of the basic components of the workstation (i.e., a chair and a desk, and the position of the computer at the workstation and its screen with respect to windows) and lighting fittings were analysed. Typical mistakes in the layout of a workstation were chairs inappropriate for computer work, as well as broken chair adjustment mechanisms, which qualified chairs for repair or replacement. Wrong positioning of monitors on the desk and with regard to windows and lighting fittings was also noted.

Źródło:

International Journal of Occupational Safety and Ergonomics; 2000, Zeszyt Specjalny; 119-126
1080-3548

Pojawia się w:

International Journal of Occupational Safety and Ergonomics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 18.

Tytuł:

Conjugate numerical investigation of a miniature flat-plate evaporator of a capillary pumped loop for electronics cooling

Autorzy:

Wan, Z.
Liu, W.
Tu, Z.
Nakayama, A.

Powiązania:

https://bibliotekanauki.pl/articles/1933189.pdf

Data publikacji:

2008

Wydawca:

Politechnika Gdańska

Tematy:

capillary pumped loop
flat plate evaporator
sidewall effect heat transfer limit
cooling of electronic devices

Opis:

A capillary pumped loop (CPL) is a two-phase thermal control device applied in cooling electronic devices. A two-dimensional conjugate numerical model of a miniature flat-plate capillary evaporator is presented in order to describe liquid and vapor flow, heat transfer and phase change in the porous wick structure, liquid flow and heat transfer in the compensation cavity and heat transfer in the vapor grooves and the metallic wall. The entire evaporator is solved with the SIMPLE algorithm as a conjugate problem. The shape and location of the vapor-liquid interface inside the wick are calculated, and a side wall effect heat transfer limit is introduced to estimate the evaporator's heat transport capability. The influence of various wall materials on the evaporator's performance is discussed in detail. The results suggest that an evaporator with a combined wall is capable of dissipating high heat flux and stabilizing the temperature of electronic devices at a moderate temperature level.

Źródło:

TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2008, 12, 1-2; 5-19
1428-6394

Pojawia się w:

TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 19.

Tytuł:

Characteristic studies of micron zinc particle hydrolysis in a fixed bed reactor

Autorzy:

Lv, M.
Liu, H.
Nie, X.
Ashraf, M. A.

Powiązania:

https://bibliotekanauki.pl/articles/260562.pdf

Data publikacji:

2015

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

hydrogen
zinc hydrolysis
thermal chemistry
fixed bed

Opis:

Zinc fuel is considered as a kind of promising energy sources for marine propeller. As one of the key steps for zinc marine energy power system, zinc hydrolysis process had been studied experimentally in a fixed bed reactor. In this study, we focus on the characteristics of micron zinc particle hydrolysis. The experimental results suggested that the steam inner diffusion is the controlling step of accumulative zinc particles hydrolysis reaction at a relative lower temperature and a relative higher water partial pressure. In other conditions, the chemical reaction kinetics was the controlling step. And two kinds of chemical reaction kinetics appeared in experiments: the surface reaction and the gas-gas reaction. The latter one occurs usually for larger zinc particles and high reaction temperature. Temperature seems to be one of the most important parameters for the dividing of different reaction mechanisms. Several parameters of the hydrolysis process including heating rate, water partial pressure, the particle size and temperature were also studied in this paper. Results show that the initial reaction temperature of zinc hydrolysis in fixed bed is about 410 oC. And the initial reaction temperature increases as the heating rate increases and as the water partial pressure decreases. The total hydrogen yield increases as the heating rate decreases, as the water partial pressure increases, as the zinc particle size decreases, and as the reaction temperature increases. A hydrogen yield of more than 81.5% was obtained in the fixed bed experiments.

Źródło:

Polish Maritime Research; 2015, S 1; 112-120
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 20.

Tytuł:

Investigation of the Impact of OBE-Based Teaching Reform on Students’ Learning Experiences : From the Perspective of Self-Determination Theory

Autorzy:

Liu, Xia’nan
Somasundram, Piriya A/P
He, Yanbin

Powiązania:

https://bibliotekanauki.pl/articles/2233945.pdf

Data publikacji:

2023-06-30

Wydawca:

Wydawnictwo Adam Marszałek

Tematy:

outcome-based education
self-determination theory
academic
achievement
learning satisfaction

Opis:

This study employed a questionnaire survey method and utilised the Self-Determination Theory as a theoretical framework to simulate students’ “needs”. The aim was to investigate the impact of OBE-based teaching reform on students’ academic achievement, satisfaction, autonomy, competence, and relatedness. The study used a quasi-experimental research design with 80 students from Changzhi Medical College as the sample and found that OBE teaching can improve students’ academic achievement, especially for middle and low-performance students. It can improve students’ satisfaction with the course and relatedness experience.

Źródło:

The New Educational Review; 2023, 72; 108-121
1732-6729

Pojawia się w:

The New Educational Review

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 21.

Tytuł:

Influence of pick layouts on the performance of bolter miner cutting head

Autorzy:

Qiao, S.
Wang, A. L.
Xia, Y. M.
Liu, Z. Z.
Liu, J. S.
Yang, M.

Powiązania:

https://bibliotekanauki.pl/articles/88893.pdf

Data publikacji:

2018

Wydawca:

Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa

Tematy:

optimum
pick layout
bolter miner
FEM
coal-rock cutting
load fluctuation

Opis:

A bolter miner is a new type of mining machinery with cutting and anchoring functions. In order to study the best pick layout of bolter miner cutting head. Based on the constitutive relation of Holmquist-Johnson-Cook (HJC), three simulation models of different cutting heads were established, and the whole crushing process of coal-rock was simulated by finite element method (FEM). The influence of the cutting head on the cutting performance under the condition of different rotational speeds and pick layouts was intensively studied. The results show that the relationship of load fluctuation coefficient among the three pick layouts is as follows: sequential type > hybrid type I > checkerboard type. The circumferential pick layouts can reduce the load fluctuation coefficient of cutting head. The rotational speed from 20 to 40 r/min, the torque linearly decreases with the increase of rotational speed. The rota-tional speed increases from 40 to 50 r/min, the cutting torque is relatively stable. The specific energy of chessboard type is relatively higher than the other three cutting heads. The difference of specific energy between sequential type and hybrid type I is not more than 5.5%, and the reality of the simulation is verified by cutting experiments. The results were successfully applied to the first shield type bolter miner in China.

Źródło:

Mining Science; 2018, 25; 147-160
2300-9586
2353-5423

Pojawia się w:

Mining Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 22.

Tytuł:

Finite element analysis of load characteristic of shield bolter miner cutting head under complex coal seam condition

Autorzy:

Qiao, S.
Xia, Y. M.
Liu, Z. Z.
Liu, J. S.
Ning, B.
Wang, A. L.

Powiązania:

https://bibliotekanauki.pl/articles/89071.pdf

Data publikacji:

2017

Wydawca:

Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa

Tematy:

complex coal seam
shield bolter miner
load characteristic
specific energy
load fluctuation

Opis:

Aiming at the complex conditions of the first shielded bolter miner in the actual work, the mechanical model of bolter miner cutting head was established. Based on cutting mechanism of the conical pick and the cutting head, the cutting head load and torque analysis model under complex coal seam were established. The dynamic characteristics of load and torque in the process of cutting head are analyzed under three different working conditions of cutting roof-coal layers, coal-floor layers and coal seam by finite element method. The results show that when the damage variable D=1, the coal-rock completely lacks the bearing capacity, and it forms arc-shaped crushing groove on the coal-rock. The large difference of torque between roof-coal layers and the roof-coal layers in the conical pick is 112 Nm, which indicates that the cutting head has the best performance with cutting the coal seam first and then cutting the rock. In the process of excavation, the load fluctuation coefficient of cutting the coal-floor layers and roof-coal layers is about 1.2 times of that of the coal seam. The results can provide a reference for the efficient cutting and performance evaluation of the bolter miner.

Źródło:

Mining Science; 2017, 24; 85-97
2300-9586
2353-5423

Pojawia się w:

Mining Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 23.

Tytuł:

Stream networks and knickpoints in the Sanjiangyuan Region
Rozwoj progow skalnych oraz morfologia rzek w regionie Sanjiangyuan

Autorzy:

Wang, Z
Yu, G.-A.
Brierley, G.
Liu, L.

Powiązania:

https://bibliotekanauki.pl/articles/81661.pdf

Data publikacji:

2010

Wydawca:

Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie

Tematy:

China
stream network
knickpoint
Sanjiangyuan region
morphology
river
Yangtze River
Yellow River
drainage network

Opis:

The source area of the Lancang (Mekong), Yangtze and Yellow rivers is named in Chinese Sanjiangyuan (source of three rivers). Geographical characteristics of these rivers, and various rivers at the margin of the Qinghai- Tibetan Plateau (Jialing, Minjiang, Dadu, Yalong and Jinsha) are summarized from fi eld investigations along with digital elevation model (DEM) analyses and satellite images. Uplift of the Qinghai-Tibetan Plateau has resulted in an asymmetrical distribution of tributaries for stream networks at the margins of the plateau. Almost all tributaries join the trunk stream from the northwest. Three types of drainage network are evident: plume, nervation and dendritic. In general, plume networks have a large number of first order streams. Nervation networks have a main stream and parallel tributaries. Dentritic networks are characrterized by continuous bifurcation and have a branch-like appearance. Most stream networks in the Sanjiangyuan region are of the nervation type. Several large knickpoints are evident along the longitudinal profi les of the Yellow and Yangtze Rivers. Channel aggradation immediately upstream of these knickpoints marks a transition in river processes from vertical bed evolution (i.e. incision) to horizontal channel adjustment (and associated braided and anabranching channels).
W artykule przedstawiono proces rozwoju progów skalnych wzdłuż rzek Yellow i Yangtze. Wykazano wpływ progów skalnych na zmiany morfologiczne dna koryt rzek. Głównie skoncentrowano się na zmianach agradacyjnych powyżej omawianych progów. Progi te są wyznacznikami zmian charakteru koryta rzecznego, z pionowo wciętego na wielonurtowy, roztopowy o szerszym korycie. Badania wykonano w rejonie Qinghai_Tibetan Plateau, zwanym obszarem źródłowym trzech rzek – oprócz wyżej wspomnianych również rzeka Mekong.

Źródło:

Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation; 2010, 42, 1; 79-91
0208-5771

Pojawia się w:

Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 24.

Tytuł:

Image fusion for travel time tomography inversion

Autorzy:

Yin, X.
Liu, L.
Zhao, X.
Ashraf, M. A.

Powiązania:

https://bibliotekanauki.pl/articles/259784.pdf

Data publikacji:

2015

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

tomography
inversion algorithm
wavelet transform
image fusion

Opis:

The travel time tomography technology had achieved wide application, the hinge of tomography was inversion algorithm, the ray path tracing technology had a great impact on the inversion results. In order to improve the SNR of inversion image, comprehensive utilization of inversion results with different ray tracing can be used. We presented an imaging fusion method based on improved Wilkinson iteration method. Firstly, the shortest path method and the linear travel time interpolation were used for forward calculation; then combined the improved Wilkinson iteration method with super relaxation precondition method to reduce the condition number of matrix and accelerate iterative speed, the precise integration method was used to solve the inverse matrix more precisely in tomography inversion process; finally, use wavelet transform for image fusion, obtain the final image. Therefore, the ill- conditioned linear equations were changed into iterative normal system through two times of treatment and using images with different forward algorithms for image fusion, it reduced the influence effect of measurement error on imaging. Simulation results showed that, this method can eliminate the artifacts in images effectively, it had extensive practical significance.

Źródło:

Polish Maritime Research; 2015, S 1; 149-156
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 25.

Tytuł:

Extraction of rubidium and cesium from brine solutions using a room temperature ionic liquid system containing 18-crown-6

Autorzy:

Huang, D.
Zheng, H.
Liu, Z.
Bao, A.
Li, B.

Powiązania:

https://bibliotekanauki.pl/articles/779994.pdf

Data publikacji:

2018

Wydawca:

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie

Tematy:

Rubidium
Cesium
Ionic liquid
18-crown-6
Solvent extraction

Opis:

Application of 1-butyl-3-metyhlimidazaolium hexafl uorophosphate ([C4mim][PF₆ ]), in the extraction of rubidium and cesium from brine solutions using 1,4,7,10,13,16-hexaoxacyclooctadecane (18C6) as extractant was investigated. Parameters that affect the extraction including pH of aqueous phase, equilibration time, dosage of the ionic liquid, phase ratio, concentration of 18C6 were studied. Under the optimal conditions, the single extraction effi ciency of rubidium ions and cesium ions were up 84.11% and 94.99%, respectively. The stripping of alkali metal ions from the loaded organic phase with different stripping agents and concentrations were also investigated. The initial value of the K/Cs and K/Rb ratios were 93.0 and 104.3, respectively, which have dropped 91.21% and 88.01%, respectively, after the extraction and stripping experiments. It was taken a big step in the separation and enrichment of cesium (rubidium) ion and potassium ion. The extraction mechanism was revealed most likely to be a cation exchange mode in this system.

Źródło:

Polish Journal of Chemical Technology; 2018, 20, 2; 40-46
1509-8117
1899-4741

Pojawia się w:

Polish Journal of Chemical Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 26.

Tytuł:

Regulation of gastric mucosal calcium channel activity by an antiulcer agent, ebrotidine

Autorzy:

Slomiany, B L
Liu, J.
Piotrowski, J.
Czajkowski, A.
Yotsumoto, F.
Slomiany, A.

Powiązania:

https://bibliotekanauki.pl/articles/70407.pdf

Data publikacji:

1994

Wydawca:

Polskie Towarzystwo Fizjologiczne

Tematy:

calcium channel
regulation
gastric mucosa
antiulcer agent
ebrotidine

Źródło:

Journal of Physiology and Pharmacology; 1994, 45, 1
0867-5910

Pojawia się w:

Journal of Physiology and Pharmacology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 27.

Tytuł:

Transformational leadership in operational competitiveness improvement: a case study in Malaysian automotive industry

Autorzy:

Wu, Q.
Shamsuddin, A.
Tasmin, R.
Takala, J.
Liu, Y.

Powiązania:

https://bibliotekanauki.pl/articles/407307.pdf

Data publikacji:

2012

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

przemysł motoryzacyjny
konkurencyjność
transformacja
operational competitiveness
transformational leadership
strategic adjustment
Malaysia
automobile company

Opis:

The purpose of this paper is to analyze operational competitiveness by two core factors, i.e. manufacturing strategy and transformational leadership with technology level. In additional, CFI models in sense and respond (S&R) method are introduced to optimize strategic adjustments, which give supports in fast strategic decision-making process. The analysis results of case study show that leaders in automobile companies in Malaysia should deeply develop their leadership by inspirational motivation, intellectual stimulation and building trust and confidence etc. to improve operational competitiveness. Agile operations strategy should be utilized towards automobile enterprises in Malaysia in order to be competitive under dynamic and tightrope business situations.

Źródło:

Management and Production Engineering Review; 2012, 3, 1; 62-70
2080-8208
2082-1344

Pojawia się w:

Management and Production Engineering Review

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 28.

Tytuł:

The Effect of an Ergonomic Intervention on Musculoskeletal, Psychosocial and Visual Strain of VDT Data Entry Work: The Polish Part of the International Study

Autorzy:

Konarska, M.
Wolska, A.
Widerszal-Bazyl, M.
Bugajska, J.
Roman-Liu, D.
Aaras, A.

Powiązania:

https://bibliotekanauki.pl/articles/90638.pdf

Data publikacji:

2005

Wydawca:

Centralny Instytut Ochrony Pracy

Tematy:

data entry operators
workload
ergonomic interventions
ergonomia
warunki pracy
praca biurowa
choroby narządów ruchu
komputer
bazy danych
stres
zagrożenie zdrowia
układ kostny

Opis:

A group of routine data entry operators (female) was included in the Polish MEPS (musculoskeletal-eyestrain-psychosocial-stress) study. Before the intervention, ergonomic assessment revealed improper working conditions such as inadequate lighting, uncomfortable chairs, and lack of forearm and wrist support while medical examination revealed that trapezius muscle load along with upper arm, head and back angles were higher than advisable. Subjects complained about neck and shoulder pain, visual problems, and psychosocial conditions. The ergonomic intervention included installation of new luminaires and Venetian blinds, new chairs, repair of ventilators, and optometric corrections. The results after the intervention showed mainly improvement in chair comfort, lighting conditions, visual strain, and sitting posture. However, financial limitations did not allow satisfactory completion of the intervention leading to a mixed interpretation of the results.

Źródło:

International Journal of Occupational Safety and Ergonomics; 2005, 11, 1; 65-76
1080-3548

Pojawia się w:

International Journal of Occupational Safety and Ergonomics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 29.

Tytuł:

Y Addition Effects on Hot Deformation Behavior of Cu-Zr Alloys with High Zr Content

Autorzy:

Tian, K.
Tian, B.
Volinsky, A. A.
Zhang, Y.
Liu, Y.
Du, Y.

Powiązania:

https://bibliotekanauki.pl/articles/350979.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Cu-1%Zr alloy
high Zr content
yttrium
hot deformation activation energy
dynamic recrystallization

Opis:

Isothermal hot compression experiments were carried out using the Gleeble-1500D thermal mechanical simulator. The flow stress of the Cu-1%Zr and Cu-1%Zr-0.15%Y alloys was studied at hot deformation temperature of 550°C, 650°C, 750°C, 850°C, 900°C and the strain rate of 0.001 s^-1, 0.01 s^-1, 0.1 s^-1, 1 s^-1, 10 s^-1. Hot deformation activation energy and constitutive equations for two kinds of alloys with and without yttrium addition were obtained by correlating the flow stress, strain rate and deformation temperature. The reasons for the change of hot deformation activation energy of the two alloys were analyzed. Dynamic recrystallization microstructure evolution for the two kinds of alloys during hot compression deformation was analyzed by optical and transmission electron microscopy. Cu-1%Zr and Cu-1%Zr-0.15%Y alloys exhibit similar behavior of hot compression deformation. Typical dynamic recovery occurs during the 550-750°C deformation temperature, while dynamic recrystallization (DRX) occurs during the 850-900°C deformation temperature. High Zr content and the addition of Y significantly improved Cu-1%Zr alloy hot deformation activation energy. Compared with hot deformation activation energy of pure copper, hot deformation activation energy of the Cu-1%Zr and Cu-1%Zr-0.15%Y alloys is increased by 54% and 81%, respectively. Compared with hot deformation activation energy of the Cu-1%Zr alloy, it increased by 18% with the addition of Y. The addition of yttrium refines grain, advances the dynamic recrystallization critical strain point and improves dynamic recrystallization.

Źródło:

Archives of Metallurgy and Materials; 2018, 63, 2; 875-882
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

Flexible truncation method for the reliability assessment of phased mission systems with repairable components
Zastosowanie metody elastycznego obcięcia do oceny niezawodności systemów o zadaniach okresowych z elementami naprawialnymi

Autorzy:

Lu, J.-M.
Lundteigen, M. A.
Liu, Y.
Wu, X.-Y.

Powiązania:

https://bibliotekanauki.pl/articles/300848.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN

Tematy:

flexible truncation limit
phased mission systems
reliability evaluation
repairable components
elastyczna granica obcięcia
systemy o zadaniach okresowych
ocena niezawodności
elementy naprawialne

Opis:

Phased-mission systems (PMS) are the system in which the component stresses and the system configuration may change over time. Real-world PMS usually consist of a large number of repetitive phases and repairable components. Existing approaches for the reliability analysis of this kind of PMS tend to suffer from the problem of state explosion or binary-decision-diagram (BDD) explosion. This paper presents a truncation method based on the BDD and Markov chains to solve the scaling issue. In our approach, the truncation mitigates the BDD explosion and broadens the applicability of the BDD & Markov method. Different from the classic truncations, our truncation limit is flexible, which ensures that ensure the truncation error is lower than the predefined threshold. The advantages of the proposed method are illustrated through two practical PMS which are challenging to classic non-simulation approaches.
Systemy o zadaniach okresowych (phased mission systems, PMS) to takie systemy, w których naprężenia elementów składowych oraz konfiguracja systemu mogą z czasem ulegać zmianie. W warunkach rzeczywistych, PMS zazwyczaj charakteryzują się dużą liczbą powtarzalnych faz zadaniowych i składają się z wielu naprawialnych elementów. Istniejące metody analizy niezawodności tego typu systemów niestety posiadają ograniczenia związane z problemem eksplozji stanów lub eksplozji diagramów binarnych decyzji (binary decision diagram, BDD) Praca przedstawia metodę obcinania opartą na BDD oraz łańcuchach Markowa, która pozwala rozwiązać wspomniane problemy złożoności obliczeniowej. W proponowanym podejściu, obcięcie minimalizuje eksplozję BDD zwiększając możliwości zastosowania metody opartej na BDD oraz łańcuchach Markowa. W odróżnieniu od klasycznego obcinania, w opracowanej przez nas metodzie granica obcięcia jest elastyczna co pozwala zredukować błąd obcięcia poniżej wcześniej określonego progu. Zalety proponowanej metody zilustrowano na przykładzie dwóch stosowanych w praktyce systemów PMS, które stanowią wyzwanie dla klasycznych metod niesymulacyjnych.

Źródło:

Eksploatacja i Niezawodność; 2016, 18, 2; 229-236
1507-2711

Pojawia się w:

Eksploatacja i Niezawodność

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

Tytuł:

Measurable realistic image-based 3D mapping

Autorzy:

Liu, W.
Wang, J.
Wang, J. J.
Ding, W.
Almagbile, A.

Powiązania:

https://bibliotekanauki.pl/articles/130115.pdf

Data publikacji:

2011

Wydawca:

Stowarzyszenie Geodetów Polskich

Tematy:

three-dimensional map
multi-sensor
measurable image
virtual reality
mapa trójwymiarowa
multisensor
rzeczywistość

Opis:

Maps with 3D visual models are becoming a remarkable feature of 3D map services. High-resolution image data is obtained for the construction of 3D visualized models.The3D map not only provides the capabilities of 3D measurements and knowledge mining, but also provides the virtual experienceof places of interest, such as demonstrated in the Google Earth. Applications of 3D maps are expanding into the areas of architecture, property management, and urban environment monitoring. However, the reconstruction of high quality 3D models is time consuming, and requires robust hardware and powerful software to handle the enormous amount of data. This is especially for automatic implementation of 3D models and the representation of complicated surfacesthat still need improvements with in the visualisation techniques. The shortcoming of 3D model-based maps is the limitation of detailed coverage since a user can only view and measure objects that are already modelled in the virtual environment. This paper proposes and demonstrates a 3D map concept that is realistic and image-based, that enables geometric measurements and geo-location services. Additionally, image-based 3D maps provide more detailed information of the real world than 3D model-based maps. The image-based 3D maps use geo-referenced stereo images or panoramic images. The geometric relationships between objects in the images can be resolved from the geometric model of stereo images. The panoramic function makes 3D maps more interactive with users but also creates an interesting immersive circumstance. Actually, unmeasurable image-based 3D maps already exist, such as Google street view, but only provide virtual experiences in terms of photos. The topographic and terrain attributes, such as shapes and heights though are omitted. This paper also discusses the potential for using a low cost land Mobile Mapping System (MMS) to implement realistic image 3D mapping, and evaluates the positioning accuracy that a measureable realistic image-based (MRI) system can produce. The major contribution here is the implementation of measurable images on 3D maps to obtain various measurements from real scenes.

Źródło:

Archiwum Fotogrametrii, Kartografii i Teledetekcji; 2011, 22; 297-310
2083-2214
2391-9477

Pojawia się w:

Archiwum Fotogrametrii, Kartografii i Teledetekcji

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 32.

Tytuł:

Novel Modulator Topology for Corona Plasma Generation

Autorzy:

Ariaans, T.
Pemen, A.
Winands, G.
Liu, Z.
van Heesch, E.

Powiązania:

https://bibliotekanauki.pl/articles/1807899.pdf

Data publikacji:

2009-06

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

52.50.Dg
52.70.Ds
52.70.Kz
52.80.Hc
82.33.Xj
96.60.pf

Opis:

Gas cleaning using plasma technology is slowly introduced into industry nowadays. Several challenges still have to be overcome: increasing the scale, safety, life-time and reducing costs. In 2006 we demonstrated a 20 kW nanosecond pulsed corona system. The electrical efficiency was > 90%. O-radical yields were found to be very high (3-7 mole/kWh). However, to be competitive, high costs of the pulsed power technology are still a major hurdle. Here we present a novel modulator for efficient generation of large volume corona plasma. Only a small amount of expensive high-voltage components are required. Switching is done at an intermediate voltage level of 1 kV with standard thyristors. At the high-voltage side, only a diode and a pulse transformer are needed. The estimated costs are about 5 kEuro/kW, whereas for state-of-the-art pulsed power technology these costs usually are about 20-30 kEuro/kW. Detailed investigations on the modulator and a wire-plate corona reactor will be presented. Modulator parameters have been varied systematically as well as reactor parameters (number of electrodes, electrode-plate distance). The O-radical yield was determined from the measured ozone concentrations at the exhaust of the reactor. With a detailed kinetic model, ozone concentrations could be calculated back to the initial O*-yields. The following conclusions will be discussed: for all parameters, an electrical efficiency of > 90% could be obtained. With fast imaging, the average streamer width was found to be ∼ 737 μm and an estimate for the plasma volume was made. The obtained yields of O-radicals (1-4 mole/kWh) are excellent. The conditions to obtain high yields will be discussed.

Źródło:

Acta Physica Polonica A; 2009, 115, 6; 1034-1036
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 33.

Tytuł:

Solvent-free synthesis of 1-amidoalkyl-2-naphthol and 3-amino-1-phenyl-1H benzo[f]chromene-2-carbonitrile derivatives by Fe3O4@enamine-B(OSO3H)2 as an efficient and novel heterogeneous magnetic nanostructure catalyst

Autorzy:

Li, Fangping
Zhang, Jun
Wang, Longjiang
Liu, Weijian
Yousif, Qahtan A.

Powiązania:

https://bibliotekanauki.pl/articles/778863.pdf

Data publikacji:

2020

Wydawca:

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie

Tematy:

1-amidoalkyl-2-naphthol
3-amino-1-phenyl-1H benzo[f]chromene-2-carbonitrile
solvent-free conditions
magnetic
catalyst

Opis:

A green procedure for the one-pot three-component synthesis of 1-amidoalkyl-2-naphthol and 3-amino-1-phenyl-1H benzo[f]chromene-2-carbonitrile derivatives from the reaction of 2-naphtol, aldehydes, and malononitrile/acetamide in the presence of a catalytic amount of Fe₃O₄@enamine-B(OSO₃H)₂ as an efficient and novel heterogeneous magnetic nanostructure catalyst is described. The catalyst was characterized using Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), vibrating sample magnetometry (VSM), energy dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD). These strategies possess some merits such as simple work-up method, easy preparation of the catalyst, short reaction times, good-to-high yields, and non-use of hazardous solvents during all steps of the reactions. Moreover, due to the magnetic nature of the catalyst, it was readily recovered by magnetic decantation and can be recycled at least six runs with no considerable decrease in catalytic activity.

Źródło:

Polish Journal of Chemical Technology; 2020, 22, 2; 9-19
1509-8117
1899-4741

Pojawia się w:

Polish Journal of Chemical Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 34.

Tytuł:

Asymmetric Magnetization Reversal in the Exchange-Biased MnO/(Ga,Mn)As Heterostructure Studied by Ferromagnetic Resonance

Autorzy:

Dziatkowski, K.
Ge, Z.
Liu, X.
Furdyna, J. K.
Twardowski, A.

Powiązania:

https://bibliotekanauki.pl/articles/2046987.pdf

Data publikacji:

2006-09

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

75.50.Pp
76.50.+g
75.30.Gw
75.70.Cn

Opis:

We report ferromagnetic resonance study of the magnetization reversal in the exchange-coupled MnO/(Ga,Mn)As system. The low-field parts of ferromagnetic resonance spectra measured along [1/10] and [100] directions of (Ga,Mn)As were combined into hysteresis loops, which under field-cooling conditions similarly to SQUID loops are shifted toward negative magnetic fields. The magnetization reversal process revealed by the loops occurred remarkably asymmetric for both sample configurations.

Źródło:

Acta Physica Polonica A; 2006, 110, 3; 319-324
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 35.

Tytuł:

Optimal configurations of wave energy converter arrays with a floating body

Autorzy:

Zhang, W.
Liu, H.
Zhang, X.
Zhang, L.
Ashraf, M. A.

Powiązania:

https://bibliotekanauki.pl/articles/260084.pdf

Data publikacji:

2016

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

wave energy
cylinder array
power take-off
hydrodynamic analysis

Opis:

An array of floating point-absorbing wave energy converters (WECs) is usually employed for extracting efficiently ocean wave energy. For deep water environment, it is more feasible and convenient to connect the absorbers array with a floating body, such as a semi-submersible bottom-moored disk, whose function is to act as the virtual seabed. In the present work, an array of identical floating symmetrically distributed cylinders in a coaxial moored disk as a wave energy device is proposed The power take-off (PTO) system in the wave energy device is assumed to be composed of a linear/nonlinear damper activated by the buoys heaving motion. Hydrodynamic analysis of the examined floating system is implemented in frequency domain. Hydrodynamic interferences between the oscillating bodies are accounted for in the corresponding coupled equations. The array layouts under the constraint of the disk, incidence wave directions, separating distance between the absorbers and the PTO damping are considered to optimize this kind of WECs. Numerical results with regular waves are presented and discussed for the axisymmetric system utilizing heave mode with these interaction factors, in terms of a specific numbers of cylinders and expected power production.

Źródło:

Polish Maritime Research; 2016, S 1; 71-77
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 36.

Tytuł:

0.2-kJ and 2-kJ high rep rate Dense Plasma foci : their design, technology, and applications

Autorzy:

Dubrovsky, A. V.
Gribkov, V. A.
Ivanov, Y. P.
Lee, P.
Lee, S.
Liu, M.
Samarin, V. A.

Powiązania:

https://bibliotekanauki.pl/articles/146546.pdf

Data publikacji:

2001

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

dense plasma focus (DPF)
DPF installation
miniature focus chamber
soft and hard X-ray radiation

Opis:

The paper presents various designs of several medium and small size Dense Plasma Focus (DPF) chambers intended for numerous applications, a description of technologies used in these facilities, and some results reached with these devices by using a number of diagnostic techniques. In present experiments the DP foci have been used mainly as an X-ray source. We discuss here how it is possible to satisfy absolutely new and very strict demands on the construction and technology for the devices to be eventually applied in science and industry. Between these characteristics there are a high repetition rate (typically 1…15 Hz) and a long lifetime (over 1 million shots). Their switching elements, a collector and chambers must withstand a high quasi-continuous heat load (up to 100 kW). High energy density in the central part of the chamber anode and the necessity to provide a channel for radiation extraction demanded a special construction and specific materials implementation in this region. Their X-ray spectrum should be tuned. They have to operate with different working gases and preferably in a wide range of pressures. All these points are discussed in this report. Capabilities of the described techniques are illustrated by results of the recent experimental studies carried out with facilities located at the Nanyang Technological University (NX1) as well as at the Lebedev Physical Institute (PF-0.2).

Źródło:

Nukleonika; 2001, 46, suppl. 1; 107-111
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 37.

Tytuł:

Using a vision cognitive algorithm to schedule virtual machines

Autorzy:

Zhao, J.
Mhedheb, Y.
Tao, J.
Jrad, F.
Liu, Q.
Streit, A.

Powiązania:

https://bibliotekanauki.pl/articles/330838.pdf

Data publikacji:

2014

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

cloud computing
vision cognitive algorithm
VM scheduling
simulation
chmura obliczeniowa
algorytm poznawczy
szeregowanie
symulacja

Opis:

Scheduling virtual machines is a major research topic for cloud computing, because it directly influences the performance, the operation cost and the quality of services. A large cloud center is normally equipped with several hundred thousand physical machines. The mission of the scheduler is to select the best one to host a virtual machine. This is an NP-hard global optimization problem with grand challenges for researchers. This work studies the Virtual Machine (VM) scheduling problem on the cloud. Our primary concern with VM scheduling is the energy consumption, because the largest part of a cloud center operation cost goes to the kilowatts used. We designed a scheduling algorithm that allocates an incoming virtual machine instance on the host machine, which results in the lowest energy consumption of the entire system. More specifically, we developed a new algorithm, called vision cognition, to solve the global optimization problem. This algorithm is inspired by the observation of how human eyes see directly the smallest/largest item without comparing them pairwisely. We theoretically proved that the algorithm works correctly and converges fast. Practically, we validated the novel algorithm, together with the scheduling concept, using a simulation approach. The adopted cloud simulator models different cloud infrastructures with various properties and detailed runtime information that can usually not be acquired from real clouds. The experimental results demonstrate the benefit of our approach in terms of reducing the cloud center energy consumption.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2014, 24, 3; 535-550
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 38.

Tytuł:

Ferromagnetic Resonance Study of Exchange Coupled (Ga,Mn)As/GaAs/(Ga,Mn)As Heterostructures

Autorzy:

Dziatkowski, K.
Ge, Z.
Liu, X.
Furdyna, J. K.
Clerjaud, B.
Twardowski, A.

Powiązania:

https://bibliotekanauki.pl/articles/2047381.pdf

Data publikacji:

2007-08

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

75.50.Pp
76.50.+g
75.70.Cn
75.30.Et
85.75.-d

Opis:

Ferromagnetic resonance study of the exchange coupled (Ga,Mn)As/ GaAs/(Ga,Mn)As heterostructures is reported. The measurements were performed on the series of samples with varying thicknesses d$\text{}_{GaAs}$ of nonmagnetic GaAs spacer, established d$\text{}_{GaAs}$-dependent extent of weak and strong interlayer exchange coupling, judging on the observation of one or two ferromagnetic resonance modes.

Źródło:

Acta Physica Polonica A; 2007, 112, 2; 227-232
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 39.

Tytuł:

New data on the anatomy of fuxianhuiid arthropod Guangweicaris spinatus from the lower Cambrian Guanshan Biota, Yunnan, China

Autorzy:

Chen, H.
Legg, D.A.
Zhai, D.-Y.
Liu, Y.
Hou, X.-G.

Powiązania:

https://bibliotekanauki.pl/articles/2082130.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Instytut Paleobiologii PAN

Tematy:

Arthropoda
Euarthropoda
Fuxianhuiida
Fuxianhuiidae
Guanshan Biota
Cambrian
Asia

Opis:

The fuxianhuiid arthropod Guangweicaris spinatus, from the lower Cambrian (Series 2, Stage 4), Guanshan Biota (Wulongqing Member, Canglangpu Formation), located in the vicinity of Kunming (Yunnan Province, southwest China), is redescribed based on new specimens and a re-examination of previously described material. A more complete overview of its morphology is given. Newly recognised features include: (i) a medial cephalic bulge; (ii) a tripartite hypostome; (iii) a pair of specialized post-antennal appendage (SPA); (iv) a putative telson; (v) two pairs of spines on the posteroventral margin of the terminal abdominal segment. This information is used to provide an emended diagnosis of the family Fuxianhuiidae, and the genus Guangweicaris.

Źródło:

Acta Palaeontologica Polonica; 2020, 65, 1; 139-148
0567-7920

Pojawia się w:

Acta Palaeontologica Polonica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 40.

Tytuł:

Stable isotopic and mineralogical investigations of an arid Quaternary lacustrine palaeoenvironment, Western Qaidam, China

Autorzy:

Bojar, A. V.
Rieser, A.
Neubauer, F.
Bojar, H. P.
Genser, J.
Liu, Y.
Ge, X. H.

Powiązania:

https://bibliotekanauki.pl/articles/2058952.pdf

Data publikacji:

2005

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

Qaidam
Quaternary
stable isotopes
celestine
carbonates
hypersaline lacustrine environment

Opis:

Stable isotope analyses on carbonates from lake evaporites collected from the non-marine western Qaidam basin yield a positive excursion from Pliocene to Quaternary times. At Dafeng Shan, the Quaternary sequences are composed of alternating layers of celestine/dolomite and aragonite/calcite/barite with distinct isotopic compositions. The sequence described at Dafeng Shan formed in a low energy, hypersaline lacustrine environment as indicated by the microstructures and evaporitic minerals as well as by the absence of lithoclasts. The peloids, ooids and oncoids described are related to microbialactivities in saline lake. The oxygen isotopic composition of the carbonates vary between +34.4 and +39.8‰ (SMOW), representing the heaviest values measured until now. The δ18 O and the δ34 S isotopic composition of the celestine range between 20.1 to 22.3‰ (SMOW) and +19 to +22‰ (CDT) respectively, suggesting sulfur recycling via sulfide oxidation. The carbon isotopic compositions of the carbonates show a large negative excursion of up to -30‰. The microstructures, mineralogy and isotopic compositions as well as the geological context suggest oxidation of methane from a deep source.

Źródło:

Geological Quarterly; 2005, 49, 2; 173-184
1641-7291

Pojawia się w:

Geological Quarterly

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 41.

Tytuł:

Dark and singular optical solitons with competing nonlocal nonlinearities

Autorzy:

Zhou, Q.
Liu, L.
Zhang, H.
Mirzazadeh, M.
Bhrawy, A. H.
Zerrad, E.
Moshokoa, S.
Biswas, A.

Powiązania:

https://bibliotekanauki.pl/articles/949415.pdf

Data publikacji:

2016

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

solitons
parabolic law nonlinearity
competing nonlinearities

Opis:

In this work, we study the dynamics of optical solitons in a synthetic nonlocal nonlinear media. The nonlinear dynamical model which describes the propagation of optical solitons in the weakly nonlocal nonlinear media with parabolic law nonlinearity is investigated analytically. The tool of integration that is the Riccati equation mapping approach is introduced to extract exact traveling wave solutions. As a result, an explicit dark soliton, singular soliton and periodic solutions are derived.

Źródło:

Optica Applicata; 2016, 46, 1; 79-86
0078-5466
1899-7015

Pojawia się w:

Optica Applicata

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 42.

Tytuł:

Excitons and Phonons in GaN. Magnetooptical and Spatially Resolved Investigations

Autorzy:

Hoffmann, A.
Eckey, L.
Siegle, H.
Kaschner, A.
Christen, J.
Bertram, F.
Liu, Q. K. K.

Powiązania:

https://bibliotekanauki.pl/articles/1968986.pdf

Data publikacji:

1998-08

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

71.35.-y
78.40.Fy
78.45.+h

Opis:

A comprehensive study of the direct photoluminescence from free-exciton states in GaN using polarization-dependent and magnetooptical measurements is presented. We measured and identified fine-structure splittings in the n=1 state of the A-exciton. From the magnetoluminescence data obtained in fields up to 15 T we determined the g-values of the conduction and valence bands parallel and perpendicular to the c-axis. Self-organized hexagonal GaN pyramids of 5 μm width and covered by six {11̲01} side facets were investigated by spatially resolved cathodoluminescence and micro-Raman spectroscopy. Beside a narrow luminescence peak at 355 nm, originating from the 2 μm thick GaN layer, an additional broad luminescence band was observed from the GaN pyramids around a wavelength of 357 nm. A strong energy shift is found along the {11̲01} pyramidal facets and directly visualized by monochromatic cathodoluminescence images and line scans. In GaN epilayers grown on GaAs substrates a series of sharp modes in the range between 60 cm$\text{}^{-1}$ and 250 cm$\text{}^{-1}$ for temperatures below 100 K was found. The intensities of these modes increased drastically with decreasing temperature. Raman excitation spectra showed a maximum between 514.5 nm and 568 nm. A comparison of spatially resolved investigations with that of intentionally doped GaN epilayers showed that the in-diffusion of As from the substrate plays an important role. Raman spectra as a function of external fields, like magnetic field and hydrostatic pressure, gave additional information about the defect type and the underlying scattering mechanism.

Źródło:

Acta Physica Polonica A; 1998, 94, 2; 125-137
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 43.

Tytuł:

Two-terminal reliability analysis for multi-phase communication networks
Analiza niezawodności par terminali w wielofazowych sieciach komunikacyjnych

Autorzy:

Lu, J.-M.
Innal, F.
Wu, X.-Y.
Liu, Y.
Lundteigen, M. A.

Powiązania:

https://bibliotekanauki.pl/articles/301295.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN

Tematy:

binary decision diagram
component-behavior model
multi-phase network systems
system reliability
binarny schemat decyzji
model zachowania komponentów
systemów sieciowych wielofazowe
niezawodność systemu

Opis:

Most researches of network reliability generally assume that the system structures do not change with time. This paper presents the concept of multi-phase network systems (MPNS) to consider dynamic characteristics of networks, and analyze the reliability of MPNS. MPNS reliability is evaluated through a cross-phase binary decision diagram (BDD). The BDD-based algorithm can act as a platform to consider various components behaviors such as repair and growing pressure. Case study shows that the proposed MPNS concept is an effective description of some practical communication networks, and the cross-phase BDD model is efficient in analyzing MPNS reliability.
Większość badań niezawodności sieci ogólnie przyjąć, że struktury systemu nie zmieniają się w czasie. W artykule przedstawiono koncepcję systemów sieciowych wielofazowych (MPNS) rozpatrywanie dynamicznych właściwości sieci i analizy niezawodności MPNS. MPNS niezawodność jest oceniany przez cross-fazowego schematu decyzyjnego binarny (BDD). Algorytm z siedzibą w BDD może działać jako platforma do rozważenia różnych komponentów zachowań, takich jak naprawy i rosnącej presji. Studium przypadku pokazuje, że proponowana koncepcja MPNS jest skutecznym opis niektórych praktycznych sieci komunikacyjnych, a cross-fazowego modelu BDD jest skuteczny w analizie MPNS niezawodność.

Źródło:

Eksploatacja i Niezawodność; 2016, 18, 3; 418-427
1507-2711

Pojawia się w:

Eksploatacja i Niezawodność

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 44.

Tytuł:

Analyzing sustainable competitive advantage: strategically managing resource allocations to achieve operational competitiveness

Autorzy:

Malek, N. A.
Shahzad, K.
Takala, J.
Bojnec, S.
Papler, D.
Liu, Y.

Powiązania:

https://bibliotekanauki.pl/articles/406814.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

sustainable competitive advantage
sustainable operations
competitive priorities
sense and respond
manufacturing strategy index
adaptive strategy

Opis:

In today’s dynamic business environment, a key challenge for all companies is to make adaptive adjustments to their manufacturing strategy. This study demonstrates the competitive priorities of manufacturing strategy in hydro-power case company to evaluate the level of sustainable competitive advantage and also to further analyze how business strategies are aligned with manufacturing strategies. This research is based on new holistic analytical evaluation of manufacturing strategy index, sense and respond, and sustainable competitive advantage models. These models help to describe, evaluate, and optimize resource allocation to meet the performance requirements in dynamic decision making. Furthermore, these models evaluate operational competitiveness for manufacturing strategies according to the multi-criteria priority. The results show that the adjustments of competitive priorities in manufacturing strategies by implementing the proposed holistic analytical models are helpful in strategically managing business operations. The discussion derives the most critical attributes in business operations while alignment of resource allocation with competitive priorities help to strategically focus those attributes. In conclusion, we argue that resource allocation and manufacturing strategies have become the most important capabilities in a business environment where companies focus to get a sustainable competitive advantage.

Źródło:

Management and Production Engineering Review; 2015, 6, 4; 70-86
2080-8208
2082-1344

Pojawia się w:

Management and Production Engineering Review

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 45.

Tytuł:

Validating performance based critical actions in a high tech start-up

Autorzy:

Vuoti, V. P.
Takala, J.
Mäntylä, A.
Liu, Y.
Yang, W.
binti Abdul Malek, N. A.
Kronman, P.
Kreuzer, A.
Zafar, A.

Powiązania:

https://bibliotekanauki.pl/articles/406824.pdf

Data publikacji:

2014

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

sustainable competitive advantage
sense and respond
manufacturing strategy index
operations strategy
balanced critical factor index
operations start up
case study

Opis:

The objective of this study is to analyze a Finnish manufacturing case company’s operational competitiveness. A proposed analytical model based on analyses the corresponding angles of the strategic triangles (Prospector, Analyzer, and Defender). The model compares the angle differences between the strategy and resource triangles with opinions from different management groups of informants. It was found out that Normalized Scaled Critical Factor Index (NSCFI) model is more scientific comparing to formal ones through validation. Calculations based on the MSI questionnaire resulted in medium high values for the Prospector strategy both for past- and future orientation. S&R calculations regarding the past orientation resulted in low values for all strategy types, except P-NSCFI for Analyzer. Moreover this study covers a case, in where Balanced Critical Factor Index (BCFI) was used defining company annual strategy plan.

Źródło:

Management and Production Engineering Review; 2014, 5, 1; 74-86
2080-8208
2082-1344

Pojawia się w:

Management and Production Engineering Review

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 46.

Tytuł:

XANES Study of La$\text{}_{0.75-x}$Gd$\text{}_{x}$Ca$\text{}_{0.25}$MnO$\text{}_{3-δ}$ Solid Solutions

Autorzy:

Drozd, V. A.
Pęka̶a, M.
Liu, R. S.
Lee, J.-F.
Chen, J. M.

Powiązania:

https://bibliotekanauki.pl/articles/2046755.pdf

Data publikacji:

2006-04

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

75.47.Lx
61.10.Ht

Opis:

A series of solid solutions La$\text{}_{0. 75-x}$Gd$\text{}_{x}$Ca$\text{}_{0.25}$MnO$\text{}_{3-δ}$ with 0.0≤x≤0.75 was prepared via carbonate precursor precipitation method. Final sintering was performed at 1250ºC in oxygen flow atmosphere. The samples obtained were characterized by scanning electron microscope, X-ray diffraction measurements. Oxygen stoichiometry was analyzed by iodometric titration method. X-ray absorption spectroscopic methods of Mn L-edge and Mn K-edge X-ray absorption near edge structure were used to study oxidation state of manganese in the solid solutions and elucidate features of their local crystal structure. Orthorhombic crystal structure characteristics of the solid solutions were refined by Rietveld method. An increase in oxygen deficiency and average manganese oxidation state were found to accompany Gd concentration increase in La$\text{}_{0.75-x}$Gd$\text{}_{x}$Ca$\text{}_{0.25}$MnO$\text{}_{3-δ}$. These results are consistent with Mn L-edge X-ray absorption near edge structure spectra, where a gradual change of Mn oxidation state with Gd concentration increase was detected. Origins of oxygen deficiency La$\text{}_{0.75- x}$Gd$\text{}_{x}$Ca$\text{}_{0.25}$MnO$\text{}_{3-δ}$ are discussed in terms of structural disorder caused by Gd substitution for La.

Źródło:

Acta Physica Polonica A; 2006, 109, 4-5; 583-589
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 47.

Tytuł:

Morphological and Morphogenetic Redescriptions and SSU rRNA Gene-based Phylogeny of the Poorly-known Species Euplotes amieti Dragesco, 1970 (Ciliophora, Euplotida)

Autorzy:

LIU, Mingjian
FAN, Yangbo
MIAO, Miao
Hu, Xiaozhong
Al-Rasheid, Khaled A. S.
Al-Farraj, Saleh A.
Ma, Honggang

Powiązania:

https://bibliotekanauki.pl/articles/763760.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego

Tematy:

Euplotidae, fresh water ciliate, ontogenesis, phylogenetic analysis, taxonomy

Opis:

This paper investigates the morphology and morphogenesis during binary fission of a Chinese population of Euplotes amieti Dragesco, 1970, a fresh water form which has previously not been well defined. This organism is morphologically very similar to the well-known Euplotes eurystomus but differs from the latter both in the number of dorsal kineties and the molecular data. According to the information obtained, it is characterized by a combination of features including nine frontoventral cirri, ca. 60 membranelles, 12–15 dorsal kineties, a macronucleus in the shape of the number 3, and a ‘double-eurystomus’ type of silverline system. Its morphogenesis proceeds broadly in the same pattern as in its congeners. In this study, the SSU rRNA gene was sequenced for the first time, and phylogenetic analyses indicated that it is closely related to the eurystomus-aediculatus-woodruffi- complex. Considering the extreme similarities in morphology between E. amieti and E.eurystomus, we believe that the four sequences (four isolates) under the name of Euplotes eurystomus (No. FR873716; FR873717; EF193250; AJ310491 deposited in GenBank) are very likely from misidentified material; that is, they represent different populations of Euplotes amieti.

Źródło:

Acta Protozoologica; 2015, 54, 3
1689-0027

Pojawia się w:

Acta Protozoologica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 48.

Tytuł:

Slope failure on a Cambrian carbonate platform, mass-flow transitions and resulting complex deposit

Autorzy:

Wang, Zhaopeng
Liu, Jiaye
Van Loon, A. J. (Tom)
Zhu, Decheng
Qin, Peng
Han, Zuozhen

Powiązania:

https://bibliotekanauki.pl/articles/2058558.pdf

Data publikacji:

2020

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

Gushan Formation
Middle Cambrian
epeiric sea
carbonate platform
mass-flow transitions

Opis:

The quiet environment of the carbonate platform in the epeiric sea that existed during the Cambrian between present-day China and Korea was occasionally affected by processes that have hitherto not been described from such a setting. A conglomerate was found in the Middle Cambrian Gushan Formation near Chengouwan (Shandong Province, E China), eroded into the underlying sediments. The conglomerate is explained as a deposit consisting of material that was eroded up-slope when slope-failure took place, resulting in a slump that passed into a high-density debris flow with erosive power that passed, in turn, again into a slump. The slump came to rest when it lost its momentum on a less inclined part of the basin slope. Immediately after deposition, fluidization occurred in the lower part of the slump deposit, as proven by a funnel-shaped water-escape structure and a lateral injection of some metres long of brecciated material.

Źródło:

Geological Quarterly; 2020, 64, 1; 3--15
1641-7291

Pojawia się w:

Geological Quarterly

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 49.

Tytuł:

Studies on Three Diverse Frontonia Species (Ciliophora, Peniculida), with Brief Notes on 14 Marine or Brackish Congeners

Autorzy:

Pan, Xuming
Liu, Weiwei
Yi, Zhenzhen
Fan, Xinpeng
Al-Rasheid, Khaled A. S.
Lin, Xiaofeng

Powiązania:

https://bibliotekanauki.pl/articles/763519.pdf

Data publikacji:

2013

Wydawca:

Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego

Tematy:

Frontonia guangdongensis, Frontonia ocularis, Frontonia schaefferi, new species, South China Sea

Opis:

Living observation and silver impregnation methods were used to investigate the morphology and infraciliature of three Frontonia ciliates (F. guangdongensis spec. nov., F. ocularis Bullington, 1939 and F. schaefferi Bullington, 1939) that were isolated from coastal waters of the South China Sea. Frontonia guangdongensis spec. nov. may be recognized by the combination of the following characteristics: cells about 160 × 35 μm in vivo; elongated body with right margin depressed in anterior third; length to width ratio 4:1 to 5:1; three or four vestibular and four or five postoral kineties; peniculi 1 and 2 each with four rows of kineties, peniculus 3 with two rows; one contractile vacuole in mid-body region right of cell median; brackish water habitat. A key based on morphological data for fourteen marine or brackish water Frontonia species found in China is also provided. In addition, the small subunit (SSU) rDNA gene was sequenced for F. ocularis Bullington, 1939. Our phylogenetic analyses support the contention that the genus Frontonia is not monophyletic.

Źródło:

Acta Protozoologica; 2013, 52, 1
1689-0027

Pojawia się w:

Acta Protozoologica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 50.

Tytuł:

Photoelectron Emission Microscopy and its Application to the Study of Polymer Surfaces

Autorzy:

Cossy-Favre, A.
Diaz, J.
Anders, S.
Padmore, H.
Liu, Y.
Samant, M.
Stöhr, J.
Brown, H.
Russell, T. P.

Powiązania:

https://bibliotekanauki.pl/articles/1964108.pdf

Data publikacji:

1997-05

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

61.16.Ms
73.61.Ph
64.75.+g

Opis:

The X-ray photoelectron emission microscopy at the Advanced Light Source has a spatial resolution of 0.2 microns at an accelerating voltage of 12 kV. The tunability of the photon energy is used to provide chemical state information using near edge X-ray absorption fine structure spectroscopy on the sub-micrometer scale. The homogeneity of thin films of polymer blends was studied for various film thicknesses. The polystyrene/polyvinylmethylether film of 194 Å showed protrusions of 2-3 μm diameter with an enriched polystyrene content while the polystyrene/polystyreneacrylonitrile 504 Å thick films showed 5-6 μm segregated regions without any topological structure.

Źródło:

Acta Physica Polonica A; 1997, 91, 5; 923-927
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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