Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "Wang, Chao" wg kryterium: Autor

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-24 z 24
    Tytuł:
    Chlorella vulgaris auto-flocculation in wastewater treatment. Preface to granulation
    Autorzy:
    Wang, Chao
    Wang, Changwen
    Sun, Wenhui
    Li, Zixiang
    Powiązania:
    https://bibliotekanauki.pl/articles/24201028.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    Chlorella vulgaris
    wastewater treatment plant
    sedimentation
    sequence batch reactor
    SBR
    oczyszczalnia ścieków
    sedymentacja
    Opis:
    Microalgae wastewater treatment technology has not only the function of wastewater treatment but also biomass production, resource recovery, and biological carbon fixation with significant economic and environmental benefits. Good sedimentation of microalgae cells is the key to realize wastewater treatment and microalgae cell proliferation. In this study, short settling time in sequence batch reactors (SBRs) was utilizable as an environmental selection pressure to promote the auto-flocculation of Chlorella vulgaris treating synthetic domestic wastewater. After 60 days of operation, bacteria-microalgae consortia formed in the reactors, improving the settling efficiencies. Microalgae cultivation reactor with 30 min settling time had the largest flocs size and highest settling efficiency. Bacteria-microalgae granular sludge had a relatively high content of P, Fe, Mg, and Ca elements that both bacteria and microalgae coexisted and adhered to each other. The dominant bacteria distribution of bacteria-microalgae granular sludge was like that of aerobic granular sludge, which implied bacteria played a vital role in Chlorella vulgaris auto-flocculation. Lastly, the mechanism of Chlorella vulgaris auto-flocculation in wastewater treatment was interpreted.
    Źródło:
    Environment Protection Engineering; 2023, 49, 1; 45--56
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of superconducting magnetic separation to an artificial mixture of chalcopyrite and molybdenite
    Autorzy:
    Li, Daokui
    Kou, Jue
    Sun, Chunbao
    Yu, Baoqiang
    Wang, Chao
    Powiązania:
    https://bibliotekanauki.pl/articles/110786.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    magnetic matrices
    superconducting magnetic separation
    buildup behavior
    chalcopyrite and molybdenite separation
    Opis:
    Superconducting magnetic separation of chalcopyrite and molybdenite was studied, along with the effects of the magnetic flux density, slurry concentration, and pulsation amplitude on the separation. According to the force equilibrium model of magnetic particles that accumulated on magnetic matrices during the superconducting magnetic separation, the saturated buildup of magnetic particles was calculated. The saturated buildup of magnetic particles was an approximate fan ring and had a positive correlation with the background magnetic flux density. Superconducting magnetic separation tests results showed that a Mo concentrate with a Mo grade of 31.86% and recovery of 87.24% and a Cu concentrate with a Cu grade of 30.57% and recovery of 94.76% could be obtained. This verified the feasibility of separating mixed Cu and Mo minerals via superconducting magnetic separation.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2019, 55, 3; 597-604
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fabric Defect Detection and Classifier via Multi-Scale Dictionary Learning and an Adaptive Differential Evolution Optimized Regularization Extreme Learning Machine
    Wykrywanie defektów tkaniny i ich klasyfikacja poprzez zastosowanie maszyny uczącej się (ADE-RELM)
    Autorzy:
    Zhou, Zhiyu
    Wang, Chao
    Gao, Xu
    Zhu, Zefei
    Hu, Xudong
    Zheng, Xiao
    Jiang, Likai
    Powiązania:
    https://bibliotekanauki.pl/articles/233999.pdf
    Data publikacji:
    2019
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    defect detection
    multi-scale dictionary learning
    regularisation extreme learning machine
    adaptive differential evolution
    defekty tkaniny
    skuteczność wykrywania defektów
    maszyna ucząca się
    Opis:
    To develop an automatic detection and classifier model for fabric defects, a novel detection and classifier technique based on multi-scale dictionary learning and the adaptive differential evolution algorithm optimised regularisation extreme learning machine (ADE-RELM) is proposed. Firstly in order to speed up dictionary updating under the condition of guaranteeing dictionary sparseness, k-means singular value decomposition (KSVD) dictionary learning is used. Then multi-scale KSVD dictionary learning is presented to extract texture features of textile images more accurately. Finally a unique ADE-RELM is designed to build a defect classifier model. In the training ADE-RELM classifier stage, a self-adaptive mutation operator is used to solve the parameter setting problem of the original differential evolution algorithm, then the adaptive differential evolution algorithm is utilised to calculate the optimal input weights and hidden bias of RELM. The method proposed is committed to detecting common defects like broken warp, broken weft, oil, and the declining warp of grey-level and pure colour fabrics. Experimental results show that compared with the traditional Gabor filter method, morphological operation and local binary pattern, the method proposed in this paper can locate defects precisely and achieve high detection efficiency.
    W celu opracowania automatycznego modelu wykrywania i klasyfikowania defektów tkanin, zaproponowano nowatorską technikę wykrywania i klasyfikowania opartą na zastosowaniu maszyny uczącej się (ADE-RELM). Proponowana metoda ma na celu wykrywanie powszechnych defektów, takich jak przerwana osnowa i wątek oraz zabrudzenia po oleju. Wyniki eksperymentalne pokazują, że w porównaniu z tradycyjną metodą filtrów Gabora, operacją morfologiczną i lokalnym wzorcem binarnym, proponowana w artykule metoda pozwala na precyzyjne zlokalizowanie defektów i osiąga wysoką skuteczność ich wykrywania.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2019, 1 (133); 67-77
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analyzing method to evaluate effect of roadway pressure relief
    Autorzy:
    Fan, Lei
    Wang, Weijun
    Yuan, Chao
    Powiązania:
    https://bibliotekanauki.pl/articles/1402308.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
    Tematy:
    matter element extension
    roadway pressure relief
    effect evaluation
    method of analysis
    Opis:
    Based on the theory of matter–element extension, this paper uses the calculation results of FLAC 3D (Fast Lagrangian Analysis of Continua) as raw data to systematically evaluate the effects of roadway pressure relief under different pressure relief options. The results show that: 1) Pressure relief can reduce rock stress on the mining roadway to a certain extent by arranging the pressure relief roadway above or on one side of it. However, the low-stress area formed by the former is larger than that created by the latter. Moreover, appropriately increasing the width of the pressure relief roadway above the mining roadway can effectively improve the stress environment of the mining roadway. 2) The excavation sequence of the pressure relief roadway and the mining roadway has a greater impact on the pressure relief effect. Adopting the method of "excavating the pressure relief roadway first, and after the stress of the surrounding rock of the pressure relief roadway is stabilized, then excavating the mining roadway" can greatly reduce or avoid the disturbance effect caused by the pressure relief roadway excavation. This sequence of excavation can significantly reduce or avoid the effects of disturbances caused by the excavation of the pressure relief roadway. 3) Excavating the pressure relief roadway on one side of the mining roadway can effectively reduce the deformation of its roof, and arranging the pressure relief roadway above the mining roadway can effectively control the deformation of its two sides. Appropriately increasing the width of the pressure relief roadway above the mining roadway can improve the effect of pressure relief.
    Źródło:
    Mining Science; 2020, 27; 283-302
    2300-9586
    2353-5423
    Pojawia się w:
    Mining Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An SFA-HMM performance evaluation method using state difference optimization for running gear systems in high-speed trains
    Autorzy:
    Cheng, Chao
    Wang, Meng
    Wang, Jiuhe
    Shao, Junjie
    Chen, Hongtian
    Powiązania:
    https://bibliotekanauki.pl/articles/2172116.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    slow feature analysis
    SFA
    performance evaluation
    hidden Markov model
    HMM
    running gear system
    analiza cech
    ocena efektywności
    ukryty model Markowa
    układ biegowy
    Opis:
    The evaluation of system performance plays an increasingly important role in the reliability analysis of cyber-physical systems. Factors of external instability affect the evaluation results in complex systems. Taking the running gear in high-speed trains as an example, its complex operating environment is the most critical factor affecting the performance evaluation design. In order to optimize the evaluation while improving accuracy, this paper develops a performance evaluation method based on slow feature analysis and a hidden Markov model (SFA-HMM). The utilization of SFA can screen out the slowest features as HMM inputs, based on which a new HMM is established for performance evaluation of running gear systems. In addition to directly classical performance evaluation for running gear systems of high-speed trains, the slow feature statistic is proposed to detect the difference in the system state through test data, and then eliminate the error evaluation of the HMM in the stable state. In addition, indicator planning and status classification of the data are performed through historical information and expert knowledge. Finally, a case study of the running gear system in high-speed trains is discussed. After comparison, the result shows that the proposed method can enhance evaluation performance.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2022, 32, 3; 389--402
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental investigation into material characteristics of pea gravel
    Autorzy:
    Zhang, Jinliang
    Huang, Qiuxiang
    Hu, Chao
    Wang, Zhiqiang
    Powiązania:
    https://bibliotekanauki.pl/articles/1852329.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    żwirek groszkowy
    właściwości morfologiczne
    pusta zawartość nieskompaktowana
    wytrzymałość na ściskanie
    cyfrowe przetwarzanie obrazu
    tarcza TBM
    pea gravel
    morphological properties
    uncompacted void content
    compressive strength
    digital image processing
    TBM shield
    Opis:
    Pea gravel is a kind of a coarse aggregate with a specific particle size used to fill the annular gap between the lining segments and the surrounding ground when tunnel construction with shield machines is performed in hard rock. The main purpose of the present study is to propose quantitative morphological indices of the pea gravel and to establish their relations with the void content of the aggregate and the compressive strength of the mixture of pea gravel and slurry (MPS). Results indicate that the pea gravel of the crushed rock generally have a larger void content than that of the river pebble, and the grain size has the highest influence on the void ratio. Elongation, roughness and angularity have moderate influences on the void ratio. The content of the oversize or undersize particles in the sample affects the void ratio of the granular assembly in a contrary way. The compressive strength of the MPS made with the river pebble is obviously smaller than that of the MPS made with the crushed rock. In the crushed rock samples, the compressive strength increases with the increase of the oversize particle content. The relations between the morphological properties and the void content, and the morphological properties and the compressive strength of the MPS are expressed as regression functions. The outcomes of this study would assist with quality assessments in TBM engineering for the selection of the pea gravel material and the prediction of the compressive strength of the MPS.
    Źródło:
    Archives of Civil Engineering; 2021, 67, 3; 415-435
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental investigation into material characteristics of pea gravel
    Autorzy:
    Zhang, Jinliang
    Huang, Qiuxiang
    Hu, Chao
    Wang, Zhiqiang
    Powiązania:
    https://bibliotekanauki.pl/articles/1852433.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    Pea gravel is a kind of a coarse aggregate with a specific particle size used to fill the annular gap between the lining segments and the surrounding ground when tunnel construction with shield machines is performed in hard rock. The main purpose of the present study is to propose quantitative morphological indices of the pea gravel and to establish their relations with the void content of the aggregate and the compressive strength of the mixture of pea gravel and slurry (MPS). Results indicate that the pea gravel of the crushed rock generally have a larger void content than that of the river pebble, and the grain size has the highest influence on the void ratio. Elongation, roughness and angularity have moderate influences on the void ratio. The content of the oversize or undersize particles in the sample affects the void ratio of the granular assembly in a contrary way. The compressive strength of the MPS made with the river pebble is obviously smaller than that of the MPS made with the crushed rock. In the crushed rock samples, the compressive strength increases with the increase of the oversize particle content. The relations between the morphological properties and the void content, and the morphological properties and the compressive strength of the MPS are expressed as regression functions. The outcomes of this study would assist with quality assessments in TBM engineering for the selection of the pea gravel material and the prediction of the compressive strength of the MPS.
    Źródło:
    Archives of Civil Engineering; 2021, 67, 3; 415-435
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative Study on NH3-SCR of High Entropy Mineral Catalytic Materials for Different Ratios of Rare Earth Concentrate/Rare Earth Tailing
    Autorzy:
    Meng, Zhaolei
    Zhu, Chao
    Wang, Jian
    Wu, Wenfei
    Powiązania:
    https://bibliotekanauki.pl/articles/778344.pdf
    Data publikacji:
    2020
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    rare earth concentrate
    rare earth tailings
    catalytic denitrification
    modification
    mineral catalysis
    Opis:
    A series of high-entropy mineral catalytic materials were obtained by mixing rare earth tailings containing Fe oxide and rare earth concentrate rich in Ce in Baiyun Obo in different proportions, and by acid-base leaching and microwave roasting. The effects of different proportions of mixed rare earth minerals on the denitrification activity of the samples were analyzed by various techniques, including XRD, EDS and SEM. The mineral phase structure and surface morphology of the catalysts were analyzed. The surface properties of the samples were tested by TPD and XPS methods. The denitrification activity of the sample was simultaneously evaluated and compared in the microreactor. The results show that the denitration efficiency of the active powder is the best when the mixing ratio of rare earth tailings/rare earth concentrate is 1:1, the denitration rate can reach 82%. In summary, different proportions of optimization are extremely effective methods to improve catalyst performance.
    Źródło:
    Polish Journal of Chemical Technology; 2020, 22, 3; 70-78
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Antioxidant Activity of Hybrid Sturgeon (Huso dauricus × Acipenser schrenckii) Protein Hydrolysate Prepared Using Bromelain, Its Fractions and Purified Peptides
    Autorzy:
    Noman, Anwar
    Wang, Yuxia
    Zhang, Chao
    Abed, Sherif M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2019350.pdf
    Data publikacji:
    2022-03-01
    Wydawca:
    Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
    Tematy:
    hybrid sturgeon
    enzymatic hydrolysis
    hydrolysis optimization
    bromelain
    degree of hydrolysis
    radical scavenging activity
    peptide purification
    Opis:
    Protein hydrolysates could be a natural and safer source of antioxidant peptides. The purpose of this study was to optimize the hydrolysis of Huso dauricus × Acipenser schrenckii sturgeon proteins using bromelain and purify antioxidant peptides from hydrolysate. The degree of hydrolysis of 18.69% was obtained under the optimal conditions and hydrolysate had 94.76% solubility, 902 nm particle size and high antioxidant activity. The IC50 for DPPH• and ABTS•+ scavenging activity were 3.14 and 3.81 mg/mL, respectively. The fraction of hydrolysate with a molecular weight of <1 kDa exhibited the highest antiradical activity against DPPH• with IC50 of 2.10 mg/mL. In turn, the IC50 of the most active fraction after the Sephadex G-15 separation was 1.77 mg/mL. The reverse phase high performance liquid chromatography (RP-HPLC) was used to purify the peptides from this fraction. The peptide with histidine, leucine and glycine (MW of 0.2955 kDa) exhibited the highest antioxidant activity (IC50 of 1.33 mg/mL). The obtained fractions and peptides with antioxidant activity could be used as natural substitutes for synthetic antioxidants, especially in food and pharmaceuticals.
    Źródło:
    Polish Journal of Food and Nutrition Sciences; 2022, 72, 1; 79-89
    1230-0322
    2083-6007
    Pojawia się w:
    Polish Journal of Food and Nutrition Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Combined effects of NQO1 Pro187Ser or SULT1A1 Arg213His polymorphism and smoking on bladder cancer risk: Two meta-analyses
    Autorzy:
    Wang, Xiao-Chun
    Wang, Jian
    Tao, Hui-Hui
    Zhang, Chao
    Xu, Li-Fa
    Powiązania:
    https://bibliotekanauki.pl/articles/2161894.pdf
    Data publikacji:
    2017-07-14
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    polymorphisms
    meta-analysis
    NQO1
    urinary bladder neoplasms
    smoking
    SULT1A1
    Opis:
    Objectives Objectives: Cigarette smoking is the major risk factor of bladder cancer via exposure to chemical carcinogens. Nicotinamide adenine dinucleotide phosphate (NADP+): quinine oxidoreductase 1 (NQO1) and sulfotransferase 1A1 (SULT1A1) have been reported to involve in the metabolism of polycyclic aromatic hydrocarbons (PAHs) and aromatic amines. Therefore, the risk of bladder cancer (BC) may be influenced by polymorphisms in the genes that modulate metabolic detoxification in particular by interacting with cigarette smoking. Considering the limited power by the individual studies with a relatively small sample size, especially when analyzing the combined effect of polymorphisms in NQO1 and SULT1A1 genes and smoking, these 2 meta-analyses have aimed to clarify the combined effects of them on BC risk by integrating related studies. Material and Methods Two meta-analyses included 1341 cases and 1346 controls concerning NQO1 Pro187Ser and smoking, and 1921 cases and 1882 controls on SULT1A1 Arg213His and smoking were performed. Odds ratios (OR) and 95% confidence intervals (CI) were used for assessing the strength of the association. Results The result has demonstrated that smokers with NQO1 Pro/Ser or Ser/Ser genotypes have a prominent association with the risk of BC as compared with non-smokers with NQO1 Pro/Pro genotype, with OR equal to 3.71 (95% CI: 2.87–4.78, $ \text{p}_\text{heterogeneity} $ = 0.376). Besides, smokers carrying SULT1A1 Arg/Arg genotypes were observed to confer 2.38 fold increased risk of BC (95% CI: 1.44–3.93, $ \text{p}_\text{heterogeneity} $ = 0.001) when compared with non-smokers with SULT1A1 Arg/Arg or His/His genotypes. Conclusions These findings have suggested that the NQO1 Pro187Ser or SULT1A1 Arg213His polymorphism combination with smoking significantly confer susceptibility to BC. Int J Occup Med Environ Health 2017;30(5):791–802
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2017, 30, 5; 791-802
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Morphology and selected properties of NR/BR/CNT nanocomposites – effect of ethanol-assisted mixing
    Struktura i wybrane właściwości nanokompozytów NR/BR/CNT – wpływ mieszania wspomaganego etanolem
    Autorzy:
    Zhang, Juzheng
    Gu, Zheng
    Meng, Chao
    Wang, Jianfa
    Sui, Jinyong
    Powiązania:
    https://bibliotekanauki.pl/articles/24202824.pdf
    Data publikacji:
    2023
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
    Tematy:
    natural rubber
    butadiene rubber
    carbon nanotube
    nanocomposites
    kauczuk naturalny
    kauczuk butadienowy
    nanorurki węglowe
    kompozyt
    dyspersja
    Opis:
    Carbon nanotubes (CNT) and ethanol-assisted mixing were used to obtain composites based on a mixture of natural rubber and butadiene rubber (NR/BR 80/20). The structure of the composites was determined by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). Thermal aging tests were also carried out and the vulcanization process was characterized. SEM confirmed the homogeneous dispersion of CNTs in the polymer matrix. Improvements in tensile and tear strength as well as thermal stability were also achieved.
    Do otrzymywania kompozytów na bazie mieszaniny kauczuku naturalnego i butadienowego (NR/BR 80/20) zastosowano nanorurki węglowe (CNT) i mieszanie wspomagane etanolem. Strukturę kompozytów określono za pomocą spektroskopii w podczerwieni z transformacją Fouriera (FTIR) oraz skaningowej mikroskopii elektronowej (SEM). Przeprowadzono również badania starzenia termicznego oraz scharakteryzowano proces wulkanizacji. Metodą SEM potwierdzono jednorodną dyspersję CNT w osnowie polimerowej. Uzyskano również poprawę wytrzymałości na rozciąganie i rozdzieranie oraz stabilności termicznej.
    Źródło:
    Polimery; 2023, 68, 5; 251--258
    0032-2725
    Pojawia się w:
    Polimery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of machine learning and rough set theory in lean maintenance decision support system development
    Autorzy:
    Antosz, Katarzyna
    Jasiulewicz-Kaczmarek, Małgorzata
    Paśko, Łukasz
    Zhang, Chao
    Wang, Shaoping
    Powiązania:
    https://bibliotekanauki.pl/articles/2038009.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    lean maintenance
    availability
    machine learning
    decision trees
    rough set theory
    Opis:
    Lean maintenance concept is crucial to increase the reliability and availability of maintenance equipment in the manufacturing companies. Due the elimination of losses in maintenance processes this concept reduce the number of unplanned downtime and unexpected failures, simultaneously influence a company’s operational and economic performance. Despite the widespread use of lean maintenance, there is no structured approach to support the choice of methods and tools used for the maintenance function improvement. Therefore, in this paper by using machine learning methods and rough set theory a new approach was proposed. This approach supports the decision makers in the selection of methods and tools for the effective implementation of Lean Maintenance.
    Źródło:
    Eksploatacja i Niezawodność; 2021, 23, 4; 695-708
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on combustion mode of methanol micro-reciprocating piston internal combustion engine
    Autorzy:
    Tang, Gang Zhi
    Wang, Shuai Bin
    Zhang, Li
    Shang, Hui Chao
    Powiązania:
    https://bibliotekanauki.pl/articles/329276.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    micro-energy power systems
    combustion diagnosis
    combustion model
    methanol
    silnik spalinowy
    diagnostyka spalania
    model spalania
    metanol
    Opis:
    Constrained by the micro-space structure, it is proposed to use platinum wire incandescent ignition combustion mode to achieve the operation of internal combustion engine. However, the combustion test of the platinum wire incandescent ignition in miniature piston internal combustion engine shows: the combustion mode of micro-space platinum wire incandescent ignition has a poor combustion characteristic, low heat release rate, long combustion duration, and low combustion pressure. Therefore, a homogenous charge compression ignition mode is proposed to realize the operation of miniature internal combustion engine. However, it is found that the compression combustion cannot be come true in the cold start-up state of the micro engine. And the compression combustion in the first cycle was realized by the way of increasing the temperature of the cylinder block and platinum wire appropriately. The results show that: The maximum heat release rate is obviously improved and the combustion duration shortened by 28.6ºCA, and pmi increased by 76%. So, a novel hybrid combustion mode of in-cylinder compression combustion supported by the platinum wire incandescent ignition is put forward, through the way of adjusting the temperature of platinum wire, and this combustion mode is regarded as the ideal combustion mode of micro reciprocating piston internal combustion engine.
    Źródło:
    Diagnostyka; 2020, 21, 1; 97-103
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Component Maintenance Strategies and Risk Analysis for Random Shock Effects Considering Maintenance Costs
    Autorzy:
    Zhang, Chao
    Zhang, Yadong
    Dui, Hongyan
    Wang, Shaoping
    Tomovic, Mileta M.
    Powiązania:
    https://bibliotekanauki.pl/articles/24200830.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    system reliability
    preventive maintenance
    importance measure
    maintenance cost
    random shock
    Opis:
    Maintenance can improve a system’s reliability in a long operation period or when a component has failed. The reliability modeling method that uses the stochastic process degradation model to describe the system degradation process has been widely used. However, the existing reliability models established using stochastic processes only consider the internal degradation process, and do not fully consider the impact of external random shocks on their reliability modeling. Furthermore, the existing theory of importance does not consider the actual factors of maintenance cost. In this paper, based on the reliability modeling of random processes, the degradation rate under the influence of random shocks is introduced into the time scale function to solve the impact of random shocks on product reliability, and two cost importance measures are proposed to guide the maintenance selection of the components under limited resources in the system. Finally, a subsystem of an aircraft hydraulic system is analyzed to verify the proposed method’s performance.
    Źródło:
    Eksploatacja i Niezawodność; 2023, 25, 2; art. no. 162011
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Importance measure-based maintenance strategy considering maintenance costs
    Autorzy:
    Zhang, Chao
    Zhang, Yadong
    Dui, Hongyan
    Wang, Shaoping
    Tomovic, Mileta M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2057976.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    system reliability
    importance measure
    maintenance cost
    preventive maintenance
    opportunistic maintenance
    Opis:
    Maintenance is an important way to ensure the best performance of repairable systems. This paper considers how to reduce system maintenance cost while ensuring consistent system performance. Due to budget constraints, preventive maintenance (PM) can be done on only some of the system components. Also, different selections of components to be maintained can have markedly different effects on system performance. On the basis of the above issues, this paper proposes an importance-based maintenance priority (IBMP) model to guide the selection of PM components. Then the model is extended to find the degree of correlation between two components to be maintained and a joint importance-based maintenance priority (JIBMP) model to guide the selection of opportunistic maintenance (OM) components is proposed. Also, optimization strategies under various conditions are proposed. Finally, a case of 2H2E architecture is used to demonstrate the proposed method. The results show that generators in the 2E layout have the highest maintenance priority, which further explains the difference in the importance of each component in PM.
    Źródło:
    Eksploatacja i Niezawodność; 2022, 24, 1; 15--24
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Enhanced effect of fine magnetite on the flotation performance of fine hematite in sodium oleate system
    Autorzy:
    Pei, Bin
    Luo, Ximei
    Yang, Wen
    Wei, Dayong
    Li, Chao
    Wang, Yunfan
    Powiązania:
    https://bibliotekanauki.pl/articles/2146908.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    magnetite
    hematite
    flotation
    magnetic aggregation
    Opis:
    In this work, the effect of magnetite with different particle sizes on the flotation performance of both coarse and fine hematite particles were investigated by using sodium oleate as a collector. The results showed that the magnetite particles with different particle sizes showed a negative effect on hematite (-106+45 μm) recovery, but the addition of magnetite with the same particle sizes as hematite during the direct flotation of -45 μm hematite was beneficial to improve the recovery of micro-fine hematite and the Fe grade of concentrate. The finer the magnetite particle was, the more obvious the agglomeration effect of hematite was. Therefore, the beneficial effect could be achieved by adjusting the particle sizes of particles. Moreover, sodium oleate was beneficial to promote the agglomeration of micro-fine magnetite and hematite. The results from the microscopic analysis, laser particle size analysis, and EDLVO calculation proved that there was an effective aggregation between fine magnetite and fine hematite particles, which increased the apparent size of hematite particles and the probability of the mineral particles adhering to bubbles, thus improving the hematite recovery.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2022, 58, 4; art. no. 149673
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Opportunistic maintenance strategy of a Heave Compensation System for expected performance degradation
    Autorzy:
    Zhang, Chao
    Qian, Yujie
    Dui, Hongyan
    Wang, Shaoping
    Chen, Rentong
    Tomovic, Mileta M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2038156.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    opportunistic maintenance
    importance measure
    heave compensation
    hydraulic system
    Monte Carlo
    Opis:
    In the marine industry, heave compensation systems are applied to marine equipment to compensate for the adverse effects of waves and the hydraulic system is usually used as the power system of heave compensation systems. This article introduces importance theory to the opportunistic maintenance (OM) strategy to provide guidance for the maintenance of heave compensation systems. The working principle of a semi-active heave compensation system and the specific working states of its hydraulic components are also first explained. Opportunistic maintenance is applied to the semi-active heave compensation system. Moreover, the joint integrated importance measure (JIIM) between different components at different moments is analyzed and used as the basis for the selection of components on which to perform PM, with the ultimate goal of delaying the degradation of the expected performance of the system. Finally, compared with conditional marginal reliability importance (CMRI)based OM, the effectiveness of JIIM-based OM is verified by the Monte Carlo method.
    Źródło:
    Eksploatacja i Niezawodność; 2021, 23, 3; 512-521
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Feasibility study on preparation of magnesium titanate in carbonthermic reduction of vanadium titanomagnetite concentrates
    Autorzy:
    Chen, Chao
    Sun, Ti-Chang
    Kou, Jue
    Wang, Xiao-Ping
    Zhao, Yong-Qiang
    Powiązania:
    https://bibliotekanauki.pl/articles/110181.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    vanadium titanomagnetite
    carbonthermic reduction
    magnesium titanate
    formation mechanism
    Opis:
    Effect of temperature and Mg:Ti ratio on phase composition and microstructure of reduced pellets was investigated to verify the feasibility of preparation of magnesium titanate by adding MgO in carbonthermic reduction of the vanadium titanomagnetite concentrates (VTC). Thermodynamic analysis results showed that magnesium titanate is more easily generated than FeTi2O5 or TiO2 by the reaction of FeTiO3 and MgO under the reductive atmosphere, which was confirmed by the discovery of magnesium titanate at roast experiment. It was found that the optimum conditions for reduction of VTC pellets were temperature of 1250 ºC and Mg:Ti ratio of 2, and the main phases of reduction product were metallic Fe and magnesium titanate (Mg2TiO4). However, trace iron impurities in Mg2TiO4 particles were found by energy-dispersive spectroscopy (EDS), so further purification is required.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2019, 55, 2; 417-425
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Calculations of the Atomic Structure for Fe XVII Lines
    Autorzy:
    Zhou, Chao
    Cao, Jian-Jian
    Liang, Liang
    Yu, Geng-Hua
    Wang, Zhan-Min
    He, Hua-Yue
    Powiązania:
    https://bibliotekanauki.pl/articles/1398915.pdf
    Data publikacji:
    2016-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    32.30.Rj
    32.70.Cs
    34.80.Dp
    Opis:
    Energy levels, line strengths, oscillator strengths, radiative decay rates and fine structure collision strengths are presented for sixteen-times ionized iron (Fe XVII). The atomic data are calculated with the AUTOSTRUCTURE code, where relativistic corrections are introduced according to the Breit-Pauli distorted wave approach. The calculations of atomic data for 89 fine-structure levels generated from eleven configurations 2s²2p⁶, 2s²2p⁵ (3s, 3p, 3d), 2s²2p⁵ (4s, 4p, 4d, 4f) and 2s¹2p⁶ (3s, 3p, 3d) of the Ne-like Fe ion are presented. Fine structure collision strengths for transitions from the ground and the first four excited levels are presented at four electron energies: 75, 125, 175, and 250 Ry. These atomic structure data are compared with the available experimental and theoretical results.
    Źródło:
    Acta Physica Polonica A; 2016, 129, 6; 1109-1117
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An association between cumulative exposure to light at night and the prevalence of hyperuricemia in steel workers
    Autorzy:
    Li, Xiaoming
    Xu, Xianghui
    Song, Yang
    Cui, Shiyue
    Xue, Chao
    Wang, Lihua
    Wu, Jianhui
    Yuan, Juxiang
    Powiązania:
    https://bibliotekanauki.pl/articles/2085783.pdf
    Data publikacji:
    2021-06-28
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    uric acid
    circadian rhythms
    hyperuricemia
    steel workers
    light at night
    restricted cubic spline
    Opis:
    ObjectivesExposure to light at night (LAN) can disturb circadian endocrine and metabolic rhythms. Hyperuricemia (HUA) is an early-onset metabolic disorder. However, it is still not clear whether LAN exposure increases the prevalence of HUA.Material and MethodsThe authors used crosssectional data on the Beijing-Tianjin-Hebei occupational populations cohort from March–July 2017. A total of 7664 steel workers were finally selected to investigate the relationship between LAN exposure and the prevalence of HUA among steel workers. The authors collected demographic and socio-economic data, as well as information on lifestyle factors, anthropometric measures, and laboratory tests. The restricted cubic spline method was used to analyze the dose-response relationship between cumulative LAN exposure and the prevalence of HUA. Logistic regression analyses were used to fit the relationship between them.ResultsThe average age of the participants was 43.5±8.6 years; 7051 (91.7%) of them were males, 2749 (35.9%) reported to suffer from HUA, and 1241 (16.2%) were not exposed to LAN. There was a significant non-linear dose-response relationship between them. After adjustment for the confounding factors, including demographic data, lifestyle factors, etc., the lower LAN exposure was significantly associated with HUA (0–1931.7 days, OR = 1.180, and the 95% CI: 1.000–1.394; 1931.7–4343 days, OR = 1.215, 95% CI: 1.035–1.426).ConclusionsThis study revealed that a certain amount of exposure to LAN is independently related to the prevalence of HUA in steel workers in China.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2021, 34, 3; 385-401
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of ethanol-assisted mixing on the selected properties and homogeneity of NR/BR blends
    Wpływ mieszania wspomaganego etanolem na wybrane właściwości i jednorodność mieszanek NR/BR
    Autorzy:
    Meng, Chao
    Gu, Zheng
    Sui, Jinyong
    Wang, Jianfa
    Li, Peiyao
    Hu, Shaokai
    Zhang, Susu
    Zhang, Xiaoyi
    Wang, Haoyu
    Han, Shaolong
    Yang, Zhifei
    Powiązania:
    https://bibliotekanauki.pl/articles/24202782.pdf
    Data publikacji:
    2023
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
    Tematy:
    natural rubber
    butadiene rubber
    blends
    dispersion
    kauczuk naturalny
    kauczuk butadienowy
    mieszaniny
    dyspersja
    Opis:
    The effect of the mixing method (normal and ethanol-assisted) on selected properties of natural rubber with butadiene rubber blends (NR/BR 80/20) was investigated. Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA) were used to evaluate the properties. In addition, the mechanical tensile properties, tear resistance and thermal aging, as well as vulcanization characteristic were determined. It was found that ethanol-assisted mixing can significantly improve the mechanical properties and thermal stability of the blends as a result of better dispersion of additives in the rubber matrix.
    Zbadano wpływ metody mieszania (tradycyjna i wspomagana etanolem) na wybrane właściwości mieszanin kauczuku naturalnego z kauczukiem butadienowym (NR/BR 80/20). Do oceny właściwości zastosowano skaningową mikroskopię elektronową (SEM), spektroskopię w podczerwieni z transformacją Fouriera (FTIR) oraz analizę termograwimetryczną (TGA). Ponadto oznaczono właściwości mechaniczne przy rozciąganiu, odporność na rozdzieranie i starzenie termiczne, a także właściwości wulkanizacyjne. Stwierdzono, że mieszanie wspomagane etanolem może znacząco poprawić właściwości mechaniczne i stabilność termiczną mieszanin NR/BR, jako efekt lepszej dyspersji dodatków w osnowie gumowej.
    Źródło:
    Polimery; 2023, 68, 3; 142--148
    0032-2725
    Pojawia się w:
    Polimery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sire pedigree error estimation and sire verification of the Taiwan dairy cattle population by using SNP markers
    Autorzy:
    Chao, C.H.
    Yeh, Y.H.
    Chen, Y.M.
    Lee, K.H.
    Wang, S.H.
    Lin, T.Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/16539078.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    Holstein cattle
    genetic testing
    sire pedigree
    Opis:
    Information regarding the correct pedigree of and relationship between animals is useful for managing dairy breeding, reducing inbreeding, estimating breeding value, and establishing correct breeding programs. Additionally, the successful implementation of progeny testing is crucial for improving the genetics of dairy cattle, which depends on the availability of correct pedigree information. Incorrect pedigree information leads to bias in bull evaluation. In this study, Neogen GeneSeek Genomic Profiler (GGP) 50K SNP chips were used to identify and verify the sire of Taiwanese Holstein dairy cattle and analyze the reasons that lead to incorrect sire records. Samples were collected from 2,059 cows of 36 dairy farms, and the pedigree information was provided by breeders. The results of sire verification can be divided into three categories: submitted unconfirmed sire, submitted confirmed sire, and incorrectly submitted verified sire. Data on the sires of 1,323 (64.25%) and 572 (27.78%) dairy cows were verified and discovered, respectively. Sires of 1,895 (92.03%) dairy cattle were identified, which showed that the paternal pedigree of dairy cattle could be discovered and verified through genetic testing. An error-like analysis revealed that the data of 37 sires were incorrectly recorded because the bull’s NAAB code number was incorrectly entered into the insemination records: for 19 sires, the wrong bull was recorded because the frozen semen of a bull placed in the wrong storage tank was used, 6 had no sire records, and for 12 sires, the NAAB code of the correct bull was recorded but with a wrong stud code, marketing code, or unique number for the stud or breed. To reduce recorded sire error rates by at least 27.78%, automated identification of the mated bull must be adopted to reduce human error and improve dairy breeding management on dairy farms.
    Źródło:
    Polish Journal of Veterinary Sciences; 2022, 25, 1; 61-65
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and characterization of aldamine condensed Schiff bases and their iron salts
    Synteza i charakterystyka skondensowanych zasad Schiffa i ich soli żelaza z aldaminą
    Autorzy:
    Meng, Chao
    Gu, Zheng
    Wang, Jianfa
    Sui, Jinyong
    Hu, Shaokai
    Zhang, Susu
    Zhang, Xiaoyi
    Li, Peiyao
    Liu, Wenjin
    Hu, Yifan
    Powiązania:
    https://bibliotekanauki.pl/articles/24202772.pdf
    Data publikacji:
    2023
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
    Tematy:
    glyoxal
    terephthalaldehyde
    Schiff bases
    electrical conductivity
    glioksal
    aldehyd tereftalowy
    zasady Schiffa
    przewodność elektryczna
    Opis:
    Two types of long-chain conjugated Schiff bases and their iron salts were obtained by the coordination polycondensation of p-phenylenediamine with glyoxal or terephthalaldehyde. Elemental analysis and infrared spectroscopy (FTIR) were used to evaluate the chemical structure of the obtained poly(Schiff bases) and their salts. Thermal stability (TGA) and electrical conductivity were also investigated.
    W wyniku koordynacyjnej polikondensacji p-fenylenodiaminy z glioksalem lub aldehydem tereftalowym otrzymano dwa rodzaje długołańcuchowych sprzężonych zasad Schiffa oraz ich sole żelazowe. Do oceny struktury chemicznej otrzymanych zasad Schiffa i ich soli stosowano analizę elementarną i spektroskopię w podczerwieni (FTIR). Zbadano również stabilność termiczną (TGA) i przewodnictwo elektryczne.
    Źródło:
    Polimery; 2023, 68, 2; 99--105
    0032-2725
    Pojawia się w:
    Polimery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Aging behavior of the three-proof polyurethane coating under UV radiation
    Wpływ promieniowania UV na starzenie trójwarstwowej powłoki poliuretanowej
    Autorzy:
    Wang, Jianfa
    Gu, Zheng
    Zhao, Jie
    Zhang, Susu
    Li, Peiyao
    Meng, Chao
    Sui, Jinyong
    Zhang, Xiaoyi
    Hu, Shaokai
    Pan, Jiaying
    Li, Junyi
    Powiązania:
    https://bibliotekanauki.pl/articles/2202627.pdf
    Data publikacji:
    2022
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
    Tematy:
    polyurethane
    ultraviolet
    coating
    resin
    poliuretan
    ultrafiolet
    powłoka
    żywica
    Opis:
    The influence of UV radiation on the gloss, structure (SEM, FTIR), thermal (TGA, DTG) and mechanical properties of polyurethane resins and the three-layer protective coating made of them was investigated. The gloss of the resins was greater than that of the protective coating. UV radiation has been proven to reduce gloss (at 1,200 hours irradiation, 81.3° to 8.9° for resins, and 61.1° to 2.8° for coating).The tensile strength of the resins decreased during aging, and the relative elongation at break after reaching the minimum was increased (at the irradiation time of 100 h). In the case of coating, both the tensile strength and elongation decreased during aging and, after reaching the minimum they increased (at the irradiation time of 800 h), reaching the maximum (at the irradiation time of 1000 h), and then decreased.
    Zbadano wpływ promieniowania UV na połysk, strukturę (SEM, FTIR), właściwości termiczne (TGA, DTG) i mechaniczne żywic poliuretanowych oraz wykonanej z nich trójwarstwowej powłoki ochronnej. Połysk żywic był większy niż powłoki ochronnej. Potwierdzono, że promieniowanie UV zmniejsza połysk (przy naświetlaniu przez 1200 godzin, w przypadku żywic z 81,3° do 8,9°, a w przypadku powłok z 61,1° do 2,8°). Wytrzymałość na rozciąganie żywic zmniejszała się w trakcie starzenia, a wydłużenie względne przy zerwaniu po osiągnięciu minimum zwiększało (przy czasie naświetlania 100 h). W przypadku powłoki zarówno wytrzymałość na rozciąganie, jak i wydłużenie zmniejszały się w trakcie starzenia i po osiągnięciu minimum zwiększały (przy czasie naświetlania 800 h), osiągając maksimum (przy czasie naświetlania 1000 h), a następnie zmniejszały.
    Źródło:
    Polimery; 2022, 67, 9; 433--437
    0032-2725
    Pojawia się w:
    Polimery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-24 z 24

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies