Pub Date : 2013-08-01DOI: 10.1109/ICMREE.2013.6893688
Fanghui Zhang
The support shaft in the Direct Drive Wind Turbine is an important supporting component of the wind turbine and its performance directly affects the safety of turbine. Through combining characteristics of the Direct Drive Wind Turbine's support shaft with finite element method and engineering method, this paper analyzes the support shaft finite element of static and modal fatigue life. Through the static analysis of the support shaft, the deformation and stress-strain results show that the maximum stress is lower than the allowable stress, and the support shaft meets the static strength safety requirements; through fatigue life analysis, the maximum fatigue stress is lower than the theoretical fatigue limit and meets the fatigue strength requirements of the support shaft. The results provide a theoretical basis of improvement of the design and program finalization.
{"title":"The strength analysis of the Direct Drive Wind Turbine's support shaft","authors":"Fanghui Zhang","doi":"10.1109/ICMREE.2013.6893688","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893688","url":null,"abstract":"The support shaft in the Direct Drive Wind Turbine is an important supporting component of the wind turbine and its performance directly affects the safety of turbine. Through combining characteristics of the Direct Drive Wind Turbine's support shaft with finite element method and engineering method, this paper analyzes the support shaft finite element of static and modal fatigue life. Through the static analysis of the support shaft, the deformation and stress-strain results show that the maximum stress is lower than the allowable stress, and the support shaft meets the static strength safety requirements; through fatigue life analysis, the maximum fatigue stress is lower than the theoretical fatigue limit and meets the fatigue strength requirements of the support shaft. The results provide a theoretical basis of improvement of the design and program finalization.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"31 1","pages":"382-385"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81923599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-08-01DOI: 10.1109/ICMREE.2013.6893637
Zinian He
This paper introduces a solar raw petroleum heating system to reduce viscosity of the petroleum for its easier transport. Some aspects of design and operation are described in the paper. Natural gas, oil and water are simultaneously contained in the raw petroleum, which need to be heated up to 55°C-60°C in summer and to 68°C in winter. In order to make the system reliable, heat-pipe evacuated tube solar collectors have been used for the solar heating system. Totally 245 sets of heat-pipe evacuated tube collectors, including 1,960 tubes with total aperture area of 392 m2 are adopted. Practical operation results have shown that about 30% of daily average natural gas consumption could be saved.
{"title":"Design and operation of solar heating system for raw petroleum","authors":"Zinian He","doi":"10.1109/ICMREE.2013.6893637","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893637","url":null,"abstract":"This paper introduces a solar raw petroleum heating system to reduce viscosity of the petroleum for its easier transport. Some aspects of design and operation are described in the paper. Natural gas, oil and water are simultaneously contained in the raw petroleum, which need to be heated up to 55°C-60°C in summer and to 68°C in winter. In order to make the system reliable, heat-pipe evacuated tube solar collectors have been used for the solar heating system. Totally 245 sets of heat-pipe evacuated tube collectors, including 1,960 tubes with total aperture area of 392 m2 are adopted. Practical operation results have shown that about 30% of daily average natural gas consumption could be saved.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"35 1","pages":"155-158"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79720278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-08-01DOI: 10.1109/ICMREE.2013.6893689
M. Hou, Shiqi Li, Hongbo Dong, Chao Liu
In order to solve high carbon emission and high consumption of energy in metallurgical industry, and also to solve overcapacity of solar-cell panels, experimental research of non carbon metallurgy was explored, which contained melting in high temperature, producing electrolytic iron and hydrogen production by electrolysis. A complete set of non-carbon metallurgy system should include four technical units: power generation, electric power storage, control module and metallurgy unit. Experimental result indicates enough Energy and high temperature over 1600°C can be provided by non-carbon metallurgy technology, electron also can be offered for hydrogen reduction and electrolysis. This technology also can be used to extract and smelt other metals as Ti, Cu, Ni, Al, Mg.
{"title":"Exploratory experiment of non carbon metallurgy with wind-solar hybrid power","authors":"M. Hou, Shiqi Li, Hongbo Dong, Chao Liu","doi":"10.1109/ICMREE.2013.6893689","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893689","url":null,"abstract":"In order to solve high carbon emission and high consumption of energy in metallurgical industry, and also to solve overcapacity of solar-cell panels, experimental research of non carbon metallurgy was explored, which contained melting in high temperature, producing electrolytic iron and hydrogen production by electrolysis. A complete set of non-carbon metallurgy system should include four technical units: power generation, electric power storage, control module and metallurgy unit. Experimental result indicates enough Energy and high temperature over 1600°C can be provided by non-carbon metallurgy technology, electron also can be offered for hydrogen reduction and electrolysis. This technology also can be used to extract and smelt other metals as Ti, Cu, Ni, Al, Mg.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"12 1","pages":"386-389"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85152360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-08-01DOI: 10.1109/ICMREE.2013.6893797
Binyue Li, D. He, J. Guan, Q. Zhang
In this paper, the direct reduction of iron ore (DRI) with the lignite solid char in vertical furnace were investigated on different conditions, such as reduction temperature, residence time, ratio of solid char to iron ore. It is found that, at the range of 800~950°C, the degree of total iron (Fe%) and metallization (M%) increased with the temperature increasing, relatively, when the temperature rise up to 1100°C, Fe% was almost consistent, while M% decreased obviously. Fe% and M% increased with the residence time ranging from 0.25h to 1.5h, when it came up to 2h, both Fe% and M% varied merely. The influence of char consumption ratio on Fe% and M% had the same tendency with the residence time. When the ore size increased from 1~2mm to 5~6mm, Fe% was little change, and M% decreased with ore size increased. Finally, with grinding magnetic of the direct reduction, Fe% increased more than 5%.
{"title":"The study of the direct reduction of iron based on the lignite solid char","authors":"Binyue Li, D. He, J. Guan, Q. Zhang","doi":"10.1109/ICMREE.2013.6893797","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893797","url":null,"abstract":"In this paper, the direct reduction of iron ore (DRI) with the lignite solid char in vertical furnace were investigated on different conditions, such as reduction temperature, residence time, ratio of solid char to iron ore. It is found that, at the range of 800~950°C, the degree of total iron (Fe%) and metallization (M%) increased with the temperature increasing, relatively, when the temperature rise up to 1100°C, Fe% was almost consistent, while M% decreased obviously. Fe% and M% increased with the residence time ranging from 0.25h to 1.5h, when it came up to 2h, both Fe% and M% varied merely. The influence of char consumption ratio on Fe% and M% had the same tendency with the residence time. When the ore size increased from 1~2mm to 5~6mm, Fe% was little change, and M% decreased with ore size increased. Finally, with grinding magnetic of the direct reduction, Fe% increased more than 5%.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"20 1","pages":"813-817"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85270924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-08-01DOI: 10.1109/ICMREE.2013.6893818
Han-xu Li, Y. Tang, Chunlin Jia, Kunde Zhang
In order to achieve good results of lowering the coal ash flow temperature. three different fluxes were chosen to blend. By use of the method of mixture design, the blending proportion of complex flux was optimized. In addition, a mathematical model describing the relationship between the flow temperature and proportion of complex flux was developed. The results show that the flux of A, B and C at a mass percentage of 0, 0.52 and 0.48 resulted in the minimum coal ash flow temperature, and the prediction result of the model proved correct by the verification test. Mixture design is a available and effective method for optimizing the formulation of complex flux.
{"title":"Application of mixture design in optimizing complex flux to lower ash fusion temperature","authors":"Han-xu Li, Y. Tang, Chunlin Jia, Kunde Zhang","doi":"10.1109/ICMREE.2013.6893818","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893818","url":null,"abstract":"In order to achieve good results of lowering the coal ash flow temperature. three different fluxes were chosen to blend. By use of the method of mixture design, the blending proportion of complex flux was optimized. In addition, a mathematical model describing the relationship between the flow temperature and proportion of complex flux was developed. The results show that the flux of A, B and C at a mass percentage of 0, 0.52 and 0.48 resulted in the minimum coal ash flow temperature, and the prediction result of the model proved correct by the verification test. Mixture design is a available and effective method for optimizing the formulation of complex flux.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"8 1","pages":"904-907"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85325915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-08-01DOI: 10.1109/ICMREE.2013.6893781
Zhao Ming, Yan Zhengbo, Zhou Liukun, Wang Huijie, Xu Xiaogang
According to multi-borders, nonlinear, time-varying characteristics of the thermal system of large coal-fired power units, the relationships between the operating parameters and the energy consumption characteristics are very complex. The key operating parameters which influenced the standard coal consumption rate are obtained based on rigorous theoretical analysis. On this basis, features are extracted from the characteristics to be used as inputs of s-SVR for training and testing. Energy consumption distribution model under full conditions of large coal-fired power units based on aforesaid method has high precision.
{"title":"Energy consumption characteristics analysis of thermal power units based on s-SVR","authors":"Zhao Ming, Yan Zhengbo, Zhou Liukun, Wang Huijie, Xu Xiaogang","doi":"10.1109/ICMREE.2013.6893781","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893781","url":null,"abstract":"According to multi-borders, nonlinear, time-varying characteristics of the thermal system of large coal-fired power units, the relationships between the operating parameters and the energy consumption characteristics are very complex. The key operating parameters which influenced the standard coal consumption rate are obtained based on rigorous theoretical analysis. On this basis, features are extracted from the characteristics to be used as inputs of s-SVR for training and testing. Energy consumption distribution model under full conditions of large coal-fired power units based on aforesaid method has high precision.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"3 1","pages":"735-739"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81733636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-08-01DOI: 10.1109/ICMREE.2013.6893745
Z. Miao, F. Wang, Deng Deng
[Purpose] In order to reducing the toxicity of general cationic surfactants, biodegradable ester cationic surfactants have been developed as novel kinds of environmental products in the world. [Method] Hyperactive etherifying agent of glycidyltriethyl ammonium chloride is very important intermediate product to synthesis biodegradable ester cationic surfactants. In this paper, a kind of hyperactive etherifying agent of glycidyltriethylammonium chloride was synthesized by traditional method with epichlorohydrin and trimethylamine as raw materials. [Results] During the synthesis, the best reaction conditions have been obtained, that the reaction temperature is 25 oC, the reaction time is 3 h, the reaction solvent is acetone, and the best mol ratio of epichlorohydrin to timethylamine is 3:1. [Conclusions] In addition, the chemical structure of the product has been confirmed by FT-IR, it is conformed with glycidyltriethylammonium chloride completely.
{"title":"Preparation of hyperactive etherifying agent of glycidyltriethylammonium chloride","authors":"Z. Miao, F. Wang, Deng Deng","doi":"10.1109/ICMREE.2013.6893745","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893745","url":null,"abstract":"[Purpose] In order to reducing the toxicity of general cationic surfactants, biodegradable ester cationic surfactants have been developed as novel kinds of environmental products in the world. [Method] Hyperactive etherifying agent of glycidyltriethyl ammonium chloride is very important intermediate product to synthesis biodegradable ester cationic surfactants. In this paper, a kind of hyperactive etherifying agent of glycidyltriethylammonium chloride was synthesized by traditional method with epichlorohydrin and trimethylamine as raw materials. [Results] During the synthesis, the best reaction conditions have been obtained, that the reaction temperature is 25 oC, the reaction time is 3 h, the reaction solvent is acetone, and the best mol ratio of epichlorohydrin to timethylamine is 3:1. [Conclusions] In addition, the chemical structure of the product has been confirmed by FT-IR, it is conformed with glycidyltriethylammonium chloride completely.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"94 1","pages":"601-603"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80692022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-08-01DOI: 10.1109/ICMREE.2013.6893822
Qihui Yu, M. Cai
Future sustainable energy systems call for the introduction of integrated storage technologies. One of these technologies is compressed air energy storage (CAES). In this paper, the principle of CAES is introduced, then the mathematical model about the process of CAES is analyzed. The parameter change in the engine cylinder is studied in the different crankshaft speed. The result is that the mechanism can produce efficient energy transfer with relative low crankshaft speed. This result is very important to design mechanism for compressed air energy storage.
{"title":"The process of compressed air energy storage(CAES) analysis","authors":"Qihui Yu, M. Cai","doi":"10.1109/ICMREE.2013.6893822","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893822","url":null,"abstract":"Future sustainable energy systems call for the introduction of integrated storage technologies. One of these technologies is compressed air energy storage (CAES). In this paper, the principle of CAES is introduced, then the mathematical model about the process of CAES is analyzed. The parameter change in the engine cylinder is studied in the different crankshaft speed. The result is that the mechanism can produce efficient energy transfer with relative low crankshaft speed. This result is very important to design mechanism for compressed air energy storage.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"26 1","pages":"923-925"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83050431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-08-01DOI: 10.1109/ICMREE.2013.6893789
X. Y. Huang, H. Y. Wang, Z. Wu, T. Zhu, J. Wu
Selection of working fluid is crucial in designing an ORC system. A selection process to get potential pure working fluids for medium-temperature ORC processes has been investigated. Stability, safety and environmental aspects were considered firstly. Then vapor specific volume, latent heat, normal boiling point and critical point of refrigerants and non-refrigerating fluids are analyzed and net power output and cycle efficiency of the ORC system were calculated. Finally, 17 pure fluids were selected for the heat sources of 420 K, 470 K and 520 K respectively. The results indicated that refrigerants such as R245fa, R245ca and R365mfc are good enough for recovering waste heat of temperature ranged from 350 K to 520 K and the optimal turbine inlet pressure was ranged from 1.0 to 1.5 MPa.
{"title":"Selection of working fluids for organic rankine cycle (ORC) in waste heat power generation system","authors":"X. Y. Huang, H. Y. Wang, Z. Wu, T. Zhu, J. Wu","doi":"10.1109/ICMREE.2013.6893789","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893789","url":null,"abstract":"Selection of working fluid is crucial in designing an ORC system. A selection process to get potential pure working fluids for medium-temperature ORC processes has been investigated. Stability, safety and environmental aspects were considered firstly. Then vapor specific volume, latent heat, normal boiling point and critical point of refrigerants and non-refrigerating fluids are analyzed and net power output and cycle efficiency of the ORC system were calculated. Finally, 17 pure fluids were selected for the heat sources of 420 K, 470 K and 520 K respectively. The results indicated that refrigerants such as R245fa, R245ca and R365mfc are good enough for recovering waste heat of temperature ranged from 350 K to 520 K and the optimal turbine inlet pressure was ranged from 1.0 to 1.5 MPa.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"21 4 1","pages":"774-779"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83292095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-08-01DOI: 10.1109/ICMREE.2013.6893720
Bengui Zhang, Shou-hai Zhang, X. Jian
Poly(phthalazinone ether ketone) anion exchange membranes with pyridinium groups (PyBPPEK) as ion exchange groups for vanadium redox flow battery were prepared from poly(phthalazinone ether ketone) containing bromomethyl groups and pyridine. FTIR were used to confirm the chemical structure of PyBPPEK. The thermal stability of PyBPPEK membranes were tested by using TGA analysis. PyBPPEK membranes exhibited tensile strength higher than 50 MPa and elongation at break higher than 25%. Columbic efficiencies of VRB with PyBPPEK membrane were higher than that of VRB with Nafion117 membrane. The energy efficiency of VRB with PyBPPEK membrane reached 89.7% at a charge-discharge current density of 40 mA·cm-2 while the energy efficiency of VRB with Nafion117 membrane was 86.0% at the same current density. When the ion exchange capacity of PyBPPEK membrane was 1.50 mmol·g-1, columbic efficiencies and energy efficiencies of VRB with the PyBPPEK membrane were higher than those of VRB with Nafion117 membrane at charge-discharge current densities ranging from 20 mA·cm-2 to 60 mA·cm-2. The results suggested that PyBPPEK membranes could be potential membranes for VRB applications.
{"title":"Poly (phthalazinone ether ketone) anion exchange membranes with pyridinium groups as ion exchange groups for vanadium redox flow battery","authors":"Bengui Zhang, Shou-hai Zhang, X. Jian","doi":"10.1109/ICMREE.2013.6893720","DOIUrl":"https://doi.org/10.1109/ICMREE.2013.6893720","url":null,"abstract":"Poly(phthalazinone ether ketone) anion exchange membranes with pyridinium groups (PyBPPEK) as ion exchange groups for vanadium redox flow battery were prepared from poly(phthalazinone ether ketone) containing bromomethyl groups and pyridine. FTIR were used to confirm the chemical structure of PyBPPEK. The thermal stability of PyBPPEK membranes were tested by using TGA analysis. PyBPPEK membranes exhibited tensile strength higher than 50 MPa and elongation at break higher than 25%. Columbic efficiencies of VRB with PyBPPEK membrane were higher than that of VRB with Nafion117 membrane. The energy efficiency of VRB with PyBPPEK membrane reached 89.7% at a charge-discharge current density of 40 mA·cm-2 while the energy efficiency of VRB with Nafion117 membrane was 86.0% at the same current density. When the ion exchange capacity of PyBPPEK membrane was 1.50 mmol·g-1, columbic efficiencies and energy efficiencies of VRB with the PyBPPEK membrane were higher than those of VRB with Nafion117 membrane at charge-discharge current densities ranging from 20 mA·cm-2 to 60 mA·cm-2. The results suggested that PyBPPEK membranes could be potential membranes for VRB applications.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"32 1","pages":"500-503"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77837882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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