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Wyszukujesz frazę "Chen, Z.-Y." wg kryterium: Autor


Tytuł:
A new species of Eostrobilops Pilsbry, 1927 from China (Gastropoda: Pulmonata: Strobilopsidae)
Autorzy:
Chen, Z.-Y.
Powiązania:
https://bibliotekanauki.pl/articles/83857.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
Źródło:
Folia Malacologica; 2019, 27, 2
1506-7629
Pojawia się w:
Folia Malacologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of waste heat recovery systems on energy efficiency improvement of a heavy-duty diesel engine
Autorzy:
Ma, Z.
Chen, H.
Zhang, Y.
Powiązania:
https://bibliotekanauki.pl/articles/240819.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
energy efficiency design index
energy efficiency operational indicator
waste heat recovery system
performance analysis
reduction factor
wskaźnik efektywności energetycznej
wskaźniki eksploatacyjny efektywności energetycznej
system odzysku ciepła odpadowego
analiza wydajności
współczynnik redukcyjny
Opis:
The increase of ship’s energy utilization efficiency and the reduction of greenhouse gas emissions have been high lightened in recent years and have become an increasingly important subject for ship designers and owners. The International Maritime Organization (IMO) is seeking measures to reduce the CO2 emissions from ships, and their proposed energy efficiency design index (EEDI) and energy efficiency operational indicator (EEOI) aim at ensuring that future vessels will be more efficient. Waste heat recovery can be employed not only to improve energy utilization efficiency but also to reduce greenhouse gas emissions. In this paper, a typical conceptual large container ship employing a low speed marine diesel engine as the main propulsion machinery is introduced and three possible types of waste heat recovery systems are designed. To calculate the EEDI and EEOI of the given large container ship, two software packages are developed. From the viewpoint of operation and maintenance, lowering the ship speed and improving container load rate can greatly reduce EEOI and further reduce total fuel consumption. Although the large container ship itself can reach the IMO requirements of EEDI at the first stage with a reduction factor 10% under the reference line value, the proposed waste heat recovery systems can improve the ship EEDI reduction factor to 20% under the reference line value.
Źródło:
Archives of Thermodynamics; 2017, 38, 3; 63-75
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Boiling, steaming or rinsing? (the physics of chinese cuisine)
Gotować, gotować na parze czy może płukać? (fizyka kuchni chińskiej)
Autorzy:
Varlamov, A.
Zhou, Z.
Chen, Y.
Powiązania:
https://bibliotekanauki.pl/articles/129558.pdf
Data publikacji:
2018
Wydawca:
Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
Tematy:
complex organic molecules
proteins
damplings
heat transfer
temperature conductivity
Fourier law
Newton's law of cooling
złożone molekuły organiczne
proteiny
kluski
przenoszenie ciepła
przewodnictwo temperaturowe
prawo Fouriera
Newtonowskie prawo chłodzenia
Opis:
Some physical aspects of Chinese cuisine are discussed. We start from the cultural and historical particularities of Chinese cuisine and their food production technologies. What is the difference between raw and boiled meat? What is the difference in the physical processes of heat transfer during either the steaming of dumplings or during cooking them in boiling water? Why is it possible to cook meat stripes in a "hot pot" in ten seconds, whilst baking a turkey requires several hours? This article is devoted to a discussion of these questions.
W artykule zostały przedyskutowane niektóre aspekty kuchni chińskiej. Autorzy zaczynają od omówienia szczegółów kuchni chińskiej i technologii produkcji żywności. Autorzy zadają następujące pytania: jaka jest różnica pomiędzy mięsem surowym a gotowanym? Jaka jest różnica w fizyce procesu przenoszenia ciepła podczas przyrządzania klusków na parze wodnej a w gotującej się wodzie? Dla czego jest możliwe przyrządzanie kawałków mięsa w "gorącym garnku" w ciągu kilku sekund, podczas gdy po to, aby upiec indyka potrzebujemy kilku godzin? Artykuł ten udziela odpowiedzi na te i inne pytania.
Źródło:
Physics for Economy; 2018, 2, No.1; 55-68
2544-7742
2544-7750
Pojawia się w:
Physics for Economy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamic and resonance response analysis for a turbine blade with varying rotating speed
Autorzy:
Wang, D.
Hao, Z.
Chen, Y.
Zhang, Y.
Powiązania:
https://bibliotekanauki.pl/articles/280027.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
varying rotating speed
van der Pol oscillation
ultiple scale methodnonlinear response
bifurcation curve
Opis:
A coupling model between turbine blades with a varying rotating speed and oncoming vortices is constructed, where the coupling of the structure and the fluid is simulated by the van der Pol oscillation. Partial differential governing equations of motions for the coupled system are obtained and discretized by using the Galerkin method. The 1:2 subharmonic resonance and the 1:1 internal resonance are investigated with the multiple scale method and first-order averaged equations are then derived. Nonlinear responses and bifurcation characteristics are studied by a numerical integration method. Stability of bifurcation curves is determined by utilizing the Routh-Hurwitz criterion. The effect of system parameters including the detuning parameter, steady-state rotating speed, amplitude of periodic perturbation for the rotating speed and freestream velocity on vibration responses are investigated.
Źródło:
Journal of Theoretical and Applied Mechanics; 2018, 56, 1; 31-42
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design and implementation of large vessel navigation system based on beidou cors
Autorzy:
Huang, P.
Liu, Y.
Du, Z.
Chen, Q.
Chen, J.
Powiązania:
https://bibliotekanauki.pl/articles/260264.pdf
Data publikacji:
2017
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
Berthing
ship-based
Polar Coordinates
CORS
Opis:
The ship’s pilot can obtain the ship auxiliary information through the navigation system, when berthing system can display the parameters such as traverse speed and distance of the ship. But most of the system data show that there are insufficient precision. Taking the CORS system to obtain the location information, data Calculation of Berthing System based on Polar Coordinate Algorithm, this paper puts forward a solution to the “dead point” of the berthing and aiding system, which has a certain reference value for the design of the ship berthing assistance system.
Źródło:
Polish Maritime Research; 2017, S 3; 12-15
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Error mitigation algorithm based on bidirectional fitting method for collision avoidance of Unmanned Surface Vehicle
Autorzy:
Song, L.
Chen, Z.
Mao, Y.
Dong, Z.
Xiang, Z.
Powiązania:
https://bibliotekanauki.pl/articles/260298.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
Unmanned Surface Vehicle
position prediction
error mitigation
autoregressive model
particle swarm optimization (PSO)
Opis:
Radars and sensors are essential devices for an Unmanned Surface Vehicle (USV) to detect obstacles. Their precision has improved significantly in recent years with relatively accurate capability to locate obstacles. However, small detection errors in the estimation and prediction of trajectories of obstacles may cause serious problems in accuracy, thereby damaging the judgment of USV and affecting the effectiveness of collision avoidance. In this study, the effect of radar errors on the prediction accuracy of obstacle position is studied on the basis of the autoregressive prediction model. The cause of radar error is also analyzed. Subsequently, a bidirectional adaptive filtering algorithm based on polynomial fitting and particle swarm optimization is proposed to eliminate the observed errors in vertical and abscissa coordinates. Then, simulations of obstacle tracking and prediction are carried out, and the results show the validity of the algorithm. Finally, the method is used to simulate the collision avoidance of USV, and the results show the validity and reliability of the algorithm.
Źródło:
Polish Maritime Research; 2018, 4; 13-20
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative investigations of nonlinear and linear observers for a highly manoeuvrable target in sliding mode guidance
Autorzy:
Wang, Y.
Sun, M.
Du, S.
Chen, Z.
Powiązania:
https://bibliotekanauki.pl/articles/201020.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
guidance law
second-order sliding mode
super-twisting algorithm
linear observer
target manoeuvre
algorytm
obserwator liniowy
manewr
algorytm przesuwania
Opis:
Target manoeuvre is one of the key factors affecting guidance accuracy. To intercept highly maneuverable targets, a second-order sliding-mode guidance law, which is based on the super-twisting algorithm, is designed without depending on any information about the target motion. In the designed guidance system, the target estimator plays an essential role. Besides the existing higher-order sliding-mode observer (HOSMO), a first-order linear observer (FOLO) is also proposed to estimate the target manoeuvre, and this is the major contribution of this paper. The closed-loop guidance system can be guaranteed to be uniformly ultimately bounded (UUB) in the presence of the FOLO. The comparative simulations are carried out to investigate the overall performance resulting from these two categories of observers. The results show that the guidance law with the proposed linear observer can achieve better comprehensive criteria for the amplitude of normalised acceleration and elevator deflection requirements. The reasons for the different levels of performance of these two observer-based methods are thoroughly investigated.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2017, 65, 2; 233-245
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of modified starch on separation of fluorite from barite using sodium oleate
Autorzy:
Chen, Z.
Ren, Z.
Gao, H.
Qian, Y.
Zheng, R.
Powiązania:
https://bibliotekanauki.pl/articles/109938.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
fluorite
barite
modified starch
flotation
Opis:
In this study, a modified starch was utilized to selectively separate barite from fluorite. The results of flotation tests showed that highly selective separation of fluorite from barite was obtained when 250 mg/dm3 of modified starch and 13.16×10−5 mol/dm3 sodium oleate was used in neutral solutions. FTIR spectra results showed that the modified starch can adsorb on the fluorite and barite surfaces. Zeta potential analyses indicated that the modified starch had little effect on adsorption of sodium oleate on the fluorite surface, although it interfered with the adsorption of sodium oleate on the barite surface. Contact angle measurements results corresponded well with the flotation results.
Źródło:
Physicochemical Problems of Mineral Processing; 2018, 54, 2; 228-237
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Model construction and experimental verification of the equivalent elastic modulus of a double-helix wire rope
Autorzy:
Chen, H. Y.
Zhang, K.
Bai, Y. X.
Ma, Y.
Deng, H. Z.
Powiązania:
https://bibliotekanauki.pl/articles/280950.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
mechanical properties
wire rope
double-helix wire rope
spatial configuration curve
equivalent elastic modulus
Opis:
To accurately describe mechanical properties of a complex wire rope, a double-helix wire rope is used as an example in this study. According to the spatial structure characteristics of the central helical line of each wire rope, the spatial configuration curve for the double- -helix wire rope is obtained by using differential geometry theory. On the basis of this curve, the mathematical model of the equivalent elastic modulus of the wire rope is developed, and the elastic modulus of a 6×7+IWS wire rope is measured using a universal tensile testing machine. The experimental results are compared with the predicted results to verify correctness of the elastic modulus prediction of the double-helix wire rope.
Źródło:
Journal of Theoretical and Applied Mechanics; 2018, 56, 4; 951-960
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biomechanical evaluation of tendon connection with novel suture techniques
Autorzy:
Chen, Z.
Wang, J.
Wei, J.- S.
Hou, Z.-Y.
Li, M.
Chen, Q.-X
Powiązania:
https://bibliotekanauki.pl/articles/306902.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
ścięgno Achillesa
IFLL
biomechanika
internal fixation with limited loop
Achilles tendon
biomechanics
Opis:
Achilles tendon rupture is a severe injury with poor curative effect due to its anatomical characteristic and mechanical peculiarity. Internal fixation of limited loop (IFLL) with steel-wire has been applied on patients with tendon rupture to fix the broken ends before physical rehabilitation. The purpose of this study is to investigate the biomechanical property and radiological characteristic of such suture technique for the repairment of tendon rupture. Methods: Tendons of pigs’ hint feet were separated for the biomechanical study. Suture surgery was performed according to the protocol of IFLL. Biomechanical Testing Machine was adopted to conduct the biomechanical tensile load examination. The maximal load, elastic modulus and tendon stiffness of the stitched tendons with or without reinforcement were examined. Results: The maximum tensile load of the stitched tendons using IFLL reached 1/4 of the uninjured tendon’s maximum tensile load, indicating that such suture technique is capable of providing enough tension for the ruptured tendon. Surprisingly, tendons fixed with titanium wire showed the highest load tension, which was comparable to the undamaged tendon. Therefore, we found the biomechanical basis of using IFLL in effectively connecting the rupture ends of tendons. Conclusions: In conclusion, we provide biomechanical evidence for the use of IFLL in treatment of Achilles tendon rupture, by providing enough strength for the ankle function. Such suture technique could help the patients with better rehabilitation and reduced in-hospital stay after Achilles tendon injury.
Źródło:
Acta of Bioengineering and Biomechanics; 2018, 20, 1; 135-141
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prognozowanie uszkodzeń przekładni mostu napędowego z wykorzystaniem wstępnego przetwarzania sygnału drgań w połączeniu z sieciami neuronowymi typu RBF
Rear axle gear damage prediction using vibration signal preprocessing coupled with RBF neural networks
Autorzy:
Shao, Y.
Li, X.
Mechefske, Ch. K.
Chen, Z.
Powiązania:
https://bibliotekanauki.pl/articles/301429.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
uszkodzenie
predykcja
sygnały drganiowe
sieć neuronowa typu RBF
damage
prediction
vibration signals
RBF neural network
Opis:
Przekładnia mostu pędnego stanowi kluczową część samochodowego układu przeniesienia napędu, a trafne przewidywanie uszkodzeń jest istotne dla bezpiecznego użytkowania samochodu. Jednakże precyzja przewidywania uszkodzenia przekładni jest obecnie niska ze względu na zmienne prędkości obrotowe i zmieniające się obciążenia występujące podczas używania pojazdu. W celu zredukowania zmienności drgań i zwiększenia trafności przewidywania trwałości resztkowej przekładni, w artykule zaproponowano nową metodę predykcyjną, która łączy sieć neuronową o radialnych funkcjach bazowych (RBF) i rekurencyjne przetwarzanie wstępne. Metoda rekurencyjnego przetwarzania wstępnego zmniejsza wpływ zmienności chwilowego obciążenia i prędkości na charakterystyczne parametry uzyskane z sygnałów drganiowych. Sieć neuronowa typu RBF modeluje nieliniowe charakterystyki przenoszenia napędu przez przekładnię mostu pędnego. Sieć taka charakteryzuje się zachowaniem samoadaptacyjnym i szybką zbieżnością. Wyniki badań symulacyjnych i eksperymentalnych pokazują, że ta nowa metoda może pozwolić na udoskonalenie tradycyjnych metod predykcyjnych oraz osiąganie wysokiej precyzji w przewidywaniu uszkodzeń przekładni mostu pędnego.
The rear axle gear is a key part of the automobile transmission system and accurate damage prediction is important for car safety. However, the precision of gear damage prediction is currently low because of the varying rotating speeds and the changing loads when a truck is in use. In order to reduce the fluctuation of vibrations and enhance the predicting accuracy of gear residual life, a new predictive method, which combines the Radial Basis Function (RBF) neural network with recursive preprocessing is proposed in this paper. The recursive preprocessing method reduces the effects of instantaneous load and speed fluctuations on the characteristic parameters extracted from vibration signals. The RBF neural network models the non-linear characteristics of the rear axle gear transmission. The RBF neural network is characterized by its self-adaptive behavior and its rapid convergence. The simulated and experimental results have shown that this new method can enhance traditional prediction methods and obtain high precision for the damage prediction of rear axle gears.
Źródło:
Eksploatacja i Niezawodność; 2009, 4; 57-64
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of sodium petroleum sulfonates with different molecular weights for flotation of kyanite ore
Autorzy:
Chen, B. Z.
Gao, H.
Li, Y.
Jin, J.
Ren, Z.
Wang, W.
Powiązania:
https://bibliotekanauki.pl/articles/109492.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
evaluation
sodium petroleum sulfonate
kyanite
flotation kinetics
entrainment
Opis:
The flotation performance of sodium petroleum sulfonates with different molecular weights was evaluated for flotation of a kyanite ore, by investigating valuable mineral recovery-grade, flotation kinetics and gangue entrainment. The results indicated that the higher molecular weight of agent, the higher final cumulative kyanite recovery was, with the maximum value of 72% being obtained with KY-3 with the molecular weight of 438. The final cumulative kyanite grade initially increased, and then decreased with the molecular weight increasing. In other words, the maximum final cumulative kyanite grade (i.e. 89.05%) was obtained with KY-2 with the molecular weight of 392. The kyanite flotation kinetics followed the first order kinetics well, while the modified flotation rate constant showed a decreasing trend after the initial increase as the molecular weight increased. In addition, the overall entrainment degree decreased with decreasing molecular weight of sodium petroleum sulfonates. The use of KY-2 in kyanite flotation was an attractive option in comparison with KY-1 and KY-3.
Źródło:
Physicochemical Problems of Mineral Processing; 2017, 53, 2; 956-968
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
SMEs performance evaluation and optimization based on DEA and CFI
Autorzy:
Shi, Z.
Takala, J.
Muhos, M.
Poikkimaki, J.
Chen, Y.
Powiązania:
https://bibliotekanauki.pl/articles/407093.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
data envelopment analysis
DEA
critical Factor Index
CFI
small and medium-sized enterprises
SMEs
performance evaluation
optimization
Opis:
It is a core content of enterprise performance research evaluating and comparing enterprise performance in dynamic environment. In allusion to this problem, a variety of enterprise performance assessment methods and indexes systems are proposed. Data envelopment analysis (DEA) is a kind of effective mathematical model which is used for comparing the performance among enterprises or different units inside an enterprise, based on the real-world data. Through comparing the performance, DEA can evaluate the enterprise performance from scale effectiveness and technological effectiveness, and then get the performance optimization goals. Critical Factor Index (CFI) is a new enterprise performance assessment method proposed in recent years. This method, based on the performance perception of business leaders or staffs, evaluates the enterprise performance in different dimensions, and then gets the optimization strategy of enterprise resource allocation to improve integrated enterprise performance. This paper has structured a new evaluation and optimization system for performance of small and medium-sized enterprises (SMEs), which combine properly the DEA and CFI method to evaluate and optimize the SMEs' performance comprehensively, and has confirm this system with data of 5 Finnish SMEs.
Źródło:
Management and Production Engineering Review; 2013, 4, 1; 57-64
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Telomerase enhances osteogenic ifferentiation of sheep bone marrow mesenchymal stem cells (BMSCs) by up-regulating PI3K/Akt pathway in vitro
Autorzy:
Zhu, X.
Zhou, L.
Liu, Z.
Chen, X.
Wei, L.
Zhang, Z.
Liu, Y.
Zhu, Y.
Wang, Y.
Yang, X.
Han, Y.
Powiązania:
https://bibliotekanauki.pl/articles/2087304.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
bone marrow mesenchymal stem cells
telomerase
proliferation
osteogenic differentiation
PI3K/Akt signalling pathway
Źródło:
Polish Journal of Veterinary Sciences; 2020, 23, 3; 359-372
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Proteomics profiles reveal the potential roles of proteins involved in chicken macrophages stimulated by Lipopolysaccharide
Autorzy:
Li, S.
Chen, Y.
Xue, W.
Wang, Q.
Huai, Z.
An, C.
Wang, Y.
Powiązania:
https://bibliotekanauki.pl/articles/16647586.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
chicken macrophage (HD11)
immune response
lipopolysaccharide (LPS)
proteomics
Opis:
Lipopolysaccharide (LPS), a core part of gram-negative bacteria, is crucial for inducing an inflammatory response in living things. In the current study, we used LPS from Salmonella to stimulate chicken macrophages (HD11). Proteomics was used to investigate immune-related proteins and their roles further. Proteomics investigation revealed 31 differential expression proteins (DEPs) after 4 hours of LPS infection. 24 DEPs expressions were up-regulated, while seven were down-regulated. In this investigation, ten DEPs were mainly enriched in S. aureus infection, complement, and coagulation cascades, which were all implicated in the inflammatory response and clearance of foreign pathogens. Notably, complement C3 was shown to be up-regulated in all immune-related pathways, indicating that it is a potential protein in this study. This work contributes to a better understanding and clarification of the processes of Salmonella infection in chickens. It might bring up new possibilities for treating and breeding Salmonella-infected chickens.
Źródło:
Polish Journal of Veterinary Sciences; 2023, 26, 2; 265-274
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł

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