2ND INTERNATIONAL CONFERENCE ON GREEN ENERGY AND SUSTAINABLE DEVELOPMENT (GESD 2019)最新文献

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DAVAR method for random noise signal process of FOG based on optimal window 基于最优窗口的光纤陀螺随机噪声信号处理DAVAR方法
Weiwei Gao, Dan Fang, Hongyun Wang, Yi Wang, Hongyan Zhang
{"title":"DAVAR method for random noise signal process of FOG based on optimal window","authors":"Weiwei Gao, Dan Fang, Hongyun Wang, Yi Wang, Hongyan Zhang","doi":"10.1063/1.5116446","DOIUrl":"https://doi.org/10.1063/1.5116446","url":null,"abstract":"Allan variance method can not recognize the signal nonstationary of Fiber Optic Gyro (FOG). Dynamic Allan variance (DAVAR) is proposed to get the nonstationary characteristics for FOG, and a dynamic Quantitative Description for the major noise figure is applied. By theoretical analysis and experimental comparison, a random signal DAVAR analysis method based on optimal window is proposed for FOG. Analyzing the static data and dynamic data of FOG using the above method, the results show that the change process of the FOG major noise figures can be reflected accurately, and the recognition accuracy of the FOG noise figures is improved. The exper imental data show that DAVAR method based on Optimal Window can be used for FOG signal stability analysis.Allan variance method can not recognize the signal nonstationary of Fiber Optic Gyro (FOG). Dynamic Allan variance (DAVAR) is proposed to get the nonstationary characteristics for FOG, and a dynamic Quantitative Description for the major noise figure is applied. By theoretical analysis and experimental comparison, a random signal DAVAR analysis method based on optimal window is proposed for FOG. Analyzing the static data and dynamic data of FOG using the above method, the results show that the change process of the FOG major noise figures can be reflected accurately, and the recognition accuracy of the FOG noise figures is improved. The exper imental data show that DAVAR method based on Optimal Window can be used for FOG signal stability analysis.","PeriodicalId":266722,"journal":{"name":"2ND INTERNATIONAL CONFERENCE ON GREEN ENERGY AND SUSTAINABLE DEVELOPMENT (GESD 2019)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114797281","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}
引用次数: 0
LED-based indoor visible light communication system 基于led的室内可见光通信系统
Siqi Li
{"title":"LED-based indoor visible light communication system","authors":"Siqi Li","doi":"10.1063/1.5116451","DOIUrl":"https://doi.org/10.1063/1.5116451","url":null,"abstract":"LED-based visible light communication is a new type of communication technology that has developed rapidly in recent years. It has the advantages of rich spectrum, green environmental protection, high speed and good confidentiality. White LEDs as light source enable simultaneous illumination and communication. This paper studies and introduces the light source, channel, modulation method and application of LED-based indoor VLC system. There are problems such as multipath effect and ISI in communication. The solution introduced in this paper is divided into two aspects, light source improvement and signal modulation, and this paper introduces and compares of OOK, PPW and OFDM modulation and demodulation scheme.LED-based visible light communication is a new type of communication technology that has developed rapidly in recent years. It has the advantages of rich spectrum, green environmental protection, high speed and good confidentiality. White LEDs as light source enable simultaneous illumination and communication. This paper studies and introduces the light source, channel, modulation method and application of LED-based indoor VLC system. There are problems such as multipath effect and ISI in communication. The solution introduced in this paper is divided into two aspects, light source improvement and signal modulation, and this paper introduces and compares of OOK, PPW and OFDM modulation and demodulation scheme.","PeriodicalId":266722,"journal":{"name":"2ND INTERNATIONAL CONFERENCE ON GREEN ENERGY AND SUSTAINABLE DEVELOPMENT (GESD 2019)","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127614964","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}
引用次数: 0
A study on dechlorination of PVC catalytic combustion in air and O2/CO2 atmosphere using TG-FTIR 用TG-FTIR研究空气和O2/CO2气氛中PVC催化燃烧脱氯
Li Maodong, Bo Yang, W. Zhai, Limei Chen, Ma Xiaoqian, Yunlong Tian
{"title":"A study on dechlorination of PVC catalytic combustion in air and O2/CO2 atmosphere using TG-FTIR","authors":"Li Maodong, Bo Yang, W. Zhai, Limei Chen, Ma Xiaoqian, Yunlong Tian","doi":"10.1063/1.5116478","DOIUrl":"https://doi.org/10.1063/1.5116478","url":null,"abstract":"HCl is a dangerous gas product of garbage power plant, which is able to cause corrosion on the heated surface. PVC is the main source of HCl in garbage power plant. The combustion characteristics and dechlorination of polyvinyl chloride (PVC) play an important role in guiding the anti-corrosion work of garbage power plant. In this paper, TG-FTIR was used to make qualitative and quantitative analysis of chlorine release characteristics in the combustion of polyvinyl chloride (PVC). The thermogravimetry of PVC with different mass was systematically studied. The HCl removal efficiency of different mass ratios of CaCO3, CaO, Ca(OH)2 and kaolin under air atmosphere and O2/ CO2 atmosphere was studied. When the mass of PVC was more than 10mg, the weightlessness trend changed. The HCl removal efficiency increased with the proportion of absorbent, and the removal efficiency of Ca(OH)2 was the best. Oxygen had a great influence on the HCl removal efficiency of absorbent. The higher the proportion of oxygen, the higher the dechlorination efficiency.","PeriodicalId":266722,"journal":{"name":"2ND INTERNATIONAL CONFERENCE ON GREEN ENERGY AND SUSTAINABLE DEVELOPMENT (GESD 2019)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131158449","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}
引用次数: 2
Diversity of polyester degrading bacteria in surface sediments from Yangtze River Estuary 长江口表层沉积物中聚酯降解菌的多样性
Xin Liu, P. Hille, Minggang Zheng, P. Gao, Kun Shang, Ren Wei, Tongjun Liu, Ling-Yun Qu
{"title":"Diversity of polyester degrading bacteria in surface sediments from Yangtze River Estuary","authors":"Xin Liu, P. Hille, Minggang Zheng, P. Gao, Kun Shang, Ren Wei, Tongjun Liu, Ling-Yun Qu","doi":"10.1063/1.5116502","DOIUrl":"https://doi.org/10.1063/1.5116502","url":null,"abstract":"In order to preliminarily understand the diversity of degradable polyester-synthesizing strains in the adjacent waters of the Yangtze Estuary, solid media containing polycaprolactone (PCL) and tributyrin were used to screen strains with PCL and Tributyrin-degrading activity from the surface sediments of the adjacent waters of the Yangtze Estuary at different times by transparent circle method. In this study, 480 strains with PCL or Tributyrin degradation activity were obtained, of which 445 strains could simultaneously degrade PCL and Tributyrin, only 34 strains could degrade Tributyrin, only 1 strain could degrade PCL, accounting for 92.71%, 7.08% and 0.22% of the total number of strains, respectively. Classification studies showed that these strains belonged to 50 species of 14 genera. The dominant strains of degradable PCL and Tributyrin obtained in February, May, July and September were Psychrobacter, Bacillus, Vibrio and Vibrio, respectively. Vibrio appeared in May, July and September, especially in July. Diversity index analysis showed that the biodiversity of synthetic polyester-degrading bacteria in surface sediments of the Yangtze Estuary was higher than that of PCL-degrading bacteria in May > February > September > July, and that of Tributyrin-degrading bacteria was higher than that of PCL-degrading bacteria. The results show that PCL and Tributyrin degrading bacteria are abundant in the surface sediments of the Yangtze Estuary and play an important role in plastic biodegradation in this area.In order to preliminarily understand the diversity of degradable polyester-synthesizing strains in the adjacent waters of the Yangtze Estuary, solid media containing polycaprolactone (PCL) and tributyrin were used to screen strains with PCL and Tributyrin-degrading activity from the surface sediments of the adjacent waters of the Yangtze Estuary at different times by transparent circle method. In this study, 480 strains with PCL or Tributyrin degradation activity were obtained, of which 445 strains could simultaneously degrade PCL and Tributyrin, only 34 strains could degrade Tributyrin, only 1 strain could degrade PCL, accounting for 92.71%, 7.08% and 0.22% of the total number of strains, respectively. Classification studies showed that these strains belonged to 50 species of 14 genera. The dominant strains of degradable PCL and Tributyrin obtained in February, May, July and September were Psychrobacter, Bacillus, Vibrio and Vibrio, respectively. Vibrio appeared in May, July and September, especially in ...","PeriodicalId":266722,"journal":{"name":"2ND INTERNATIONAL CONFERENCE ON GREEN ENERGY AND SUSTAINABLE DEVELOPMENT (GESD 2019)","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115067455","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}
引用次数: 3
Application of building energy saving technology from the perspective of green building 绿色建筑视角下建筑节能技术的应用
X. Yang
{"title":"Application of building energy saving technology from the perspective of green building","authors":"X. Yang","doi":"10.1063/1.5116448","DOIUrl":"https://doi.org/10.1063/1.5116448","url":null,"abstract":"China’s urbanization process is steadily advancing, the construction industry is developing rapidly, and the problem of building energy consumption is becoming more and more serious, which has gradually attracted the attention of the country and the industry. Therefore, people put forward the concept of “green building”, which requires that in the whole life cycle of the building, resources should be saved to the maximum extent, pollution to the environment should be avoided, and space for timely and efficient use should be provided to people. Natural and harmonious architecture. As soon as “green building” is put forward, it has been heated by people in the industry. Especially as a construction unit, we should start from the perspective of green building and apply various energy-saving technologies to make due contributions to the promotion and popularization of green building.","PeriodicalId":266722,"journal":{"name":"2ND INTERNATIONAL CONFERENCE ON GREEN ENERGY AND SUSTAINABLE DEVELOPMENT (GESD 2019)","volume":"252 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115622758","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}
引用次数: 0
Self-assembled micro-energy system based on block chain and IPV6 基于区块链和IPV6的自组装微能源系统
Tiemin Jiang, Chunxiang Li, Shuang Wu, Song Meng
{"title":"Self-assembled micro-energy system based on block chain and IPV6","authors":"Tiemin Jiang, Chunxiang Li, Shuang Wu, Song Meng","doi":"10.1063/1.5116458","DOIUrl":"https://doi.org/10.1063/1.5116458","url":null,"abstract":"With the development of computer technology, block chain technology and IPV6 technology gradually enter into the practical application of various industries. This paper introduces a kind of self-assembled micro-energy system based on block chain and IPV6. This system adopts the method of combining block chain with IPV6 technology. The block chain trust guarantee mechanism and the decentralized property are used to solve the problem that each distributed participating node is difficult to trust each other. The architecture of micro-grid solves the problem of small capacity of distributed energy supply, which is not convenient for long-distance transmission and can only be absorbed near. It effectively reduces the complexity of the system, improves the efficiency of the system and reduces the cost. Realization the problems of energy efficiency and trust between users caused by improving the stability of power grid and the access of distributed power supply are discussed in this paper.With the development of computer technology, block chain technology and IPV6 technology gradually enter into the practical application of various industries. This paper introduces a kind of self-assembled micro-energy system based on block chain and IPV6. This system adopts the method of combining block chain with IPV6 technology. The block chain trust guarantee mechanism and the decentralized property are used to solve the problem that each distributed participating node is difficult to trust each other. The architecture of micro-grid solves the problem of small capacity of distributed energy supply, which is not convenient for long-distance transmission and can only be absorbed near. It effectively reduces the complexity of the system, improves the efficiency of the system and reduces the cost. Realization the problems of energy efficiency and trust between users caused by improving the stability of power grid and the access of distributed power supply are discussed in this paper.","PeriodicalId":266722,"journal":{"name":"2ND INTERNATIONAL CONFERENCE ON GREEN ENERGY AND SUSTAINABLE DEVELOPMENT (GESD 2019)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127441107","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}
引用次数: 2
Voltammetric determination of hydrogen peroxide using L-cysteine SAM-SOD modified electrode l -半胱氨酸SAM-SOD修饰电极伏安法测定过氧化氢
Yinjie Wei, T. Song, Kai Zhang
{"title":"Voltammetric determination of hydrogen peroxide using L-cysteine SAM-SOD modified electrode","authors":"Yinjie Wei, T. Song, Kai Zhang","doi":"10.1063/1.5116506","DOIUrl":"https://doi.org/10.1063/1.5116506","url":null,"abstract":"Self assembled monolayer of SOD was formed on N-acety-L-cysteine SAM modified electrode. Cyclic voltammetry was used to study the electrochemical behaviors of the modified electrode. And the electrode process was reversible one and controlled by adsorption. The SAM-SOD electrode showed an electrochemical response to H2O2. And discovered the electrode showed good linearly for 2.4×10−6 ∼2.0×10-4 mol/L of H2O2 with a detection limit of 9.0×10-7 mol/L.Self assembled monolayer of SOD was formed on N-acety-L-cysteine SAM modified electrode. Cyclic voltammetry was used to study the electrochemical behaviors of the modified electrode. And the electrode process was reversible one and controlled by adsorption. The SAM-SOD electrode showed an electrochemical response to H2O2. And discovered the electrode showed good linearly for 2.4×10−6 ∼2.0×10-4 mol/L of H2O2 with a detection limit of 9.0×10-7 mol/L.","PeriodicalId":266722,"journal":{"name":"2ND INTERNATIONAL CONFERENCE ON GREEN ENERGY AND SUSTAINABLE DEVELOPMENT (GESD 2019)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128192679","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}
引用次数: 1
Heat transfer for high temperature operation based on ANSYS thermal analysis 基于ANSYS热分析的高温工况传热分析
Yang Liu
{"title":"Heat transfer for high temperature operation based on ANSYS thermal analysis","authors":"Yang Liu","doi":"10.1063/1.5116485","DOIUrl":"https://doi.org/10.1063/1.5116485","url":null,"abstract":"Mainly consider the heat conduction between the layers of fabric, the thermal convection between the fabric and the air to establish the model of this paper. Firstly, the heat conduction equation between multilayer fabrics is constructed by the law of conservation of energy and Fourier’s law; then, the heat convection equation between the fabric and the air is expressed by Newton’s cooling formula; Finally, the thermal conductivity, temperature boundary conditions and temperature load between the fabrics of each layer were determined, and a heat transfer model conforming to the external environment—fabric (I∼III)—air layer—human skin system was established. Considering the wide application of finite element in heat transfer, we use ANSYS heat transfer module to calculate the temperature distribution of each layer of the system by using transient thermal analysis method. The simulation results are well fitted to the actual experimental results, and the temperature of each layer is generated. Distribution.Mainly consider the heat conduction between the layers of fabric, the thermal convection between the fabric and the air to establish the model of this paper. Firstly, the heat conduction equation between multilayer fabrics is constructed by the law of conservation of energy and Fourier’s law; then, the heat convection equation between the fabric and the air is expressed by Newton’s cooling formula; Finally, the thermal conductivity, temperature boundary conditions and temperature load between the fabrics of each layer were determined, and a heat transfer model conforming to the external environment—fabric (I∼III)—air layer—human skin system was established. Considering the wide application of finite element in heat transfer, we use ANSYS heat transfer module to calculate the temperature distribution of each layer of the system by using transient thermal analysis method. The simulation results are well fitted to the actual experimental results, and the temperature of each layer is generated. Distribution.","PeriodicalId":266722,"journal":{"name":"2ND INTERNATIONAL CONFERENCE ON GREEN ENERGY AND SUSTAINABLE DEVELOPMENT (GESD 2019)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128535234","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}
引用次数: 0
Distribution systems data compression based on SVD method 基于SVD方法的配电系统数据压缩
Fangzhou Hao, Libo Ma, Jianming Zhang, Hongshan Zhao
{"title":"Distribution systems data compression based on SVD method","authors":"Fangzhou Hao, Libo Ma, Jianming Zhang, Hongshan Zhao","doi":"10.1063/1.5116509","DOIUrl":"https://doi.org/10.1063/1.5116509","url":null,"abstract":"This paper proposes a data compression method of power distribution systems based on singular value decomposition (SVD). Firstly, the distribution systems data is put into the data matrix for subse...","PeriodicalId":266722,"journal":{"name":"2ND INTERNATIONAL CONFERENCE ON GREEN ENERGY AND SUSTAINABLE DEVELOPMENT (GESD 2019)","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128122358","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}
引用次数: 0
Prediction method for development index of sub-structure based on liquid volume in water flooding oilfield 基于液体体积的水驱油田子结构开发指标预测方法
Ye Yuan
{"title":"Prediction method for development index of sub-structure based on liquid volume in water flooding oilfield","authors":"Ye Yuan","doi":"10.1063/1.5116493","DOIUrl":"https://doi.org/10.1063/1.5116493","url":null,"abstract":"Since the entry into the ultra-high water cut period, the development status of the well pattern of the water injection system of each group has been different, and new development indicators have appeared. Waterflooding development faces difficulties in reserves transfer, residual oil dispersion, large reservoir yields, and low storage and mining rates, making development and adjustment increasingly difficult. How to ensure the sustainable development of waterflooding without new recoverable reserves is an urgent research topic. Therefore, according to the characteristics of geological deposits and the development of water injection, this paper has obtained the evaluation method of recoverable reserves of stratum, the method of studying the change of indicators at all levels, and the reasonable method of future prediction. Production scale. The factors affecting the development of water flooding are transformed into indicators of water flooding development [1]. Determine the change rules of development indicators after system analysis, reasonably determine the development indicators of water flooding, clarify the direction of future water flooding adjustment, improve scientific and accurate prediction of water level, and guide water flooding to provide a solid foundation for determining annual plans. Studying the characteristics, potentials and laws of oilfield development is of great significance for guiding the adjustment of oilfield development and improving the efficiency of oilfield development. In the process of guiding waterflooding planning, reasonable objectives should be determined to reduce inefficient cycle production, avoid inefficient and inefficient development, and improve oilfield development efficiency.Since the entry into the ultra-high water cut period, the development status of the well pattern of the water injection system of each group has been different, and new development indicators have appeared. Waterflooding development faces difficulties in reserves transfer, residual oil dispersion, large reservoir yields, and low storage and mining rates, making development and adjustment increasingly difficult. How to ensure the sustainable development of waterflooding without new recoverable reserves is an urgent research topic. Therefore, according to the characteristics of geological deposits and the development of water injection, this paper has obtained the evaluation method of recoverable reserves of stratum, the method of studying the change of indicators at all levels, and the reasonable method of future prediction. Production scale. The factors affecting the development of water flooding are transformed into indicators of water flooding development [1]. Determine the change rules of development i...","PeriodicalId":266722,"journal":{"name":"2ND INTERNATIONAL CONFERENCE ON GREEN ENERGY AND SUSTAINABLE DEVELOPMENT (GESD 2019)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130089257","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}
引用次数: 1
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