Pub Date : 2022-03-16DOI: 10.1109/INFOTEH53737.2022.9751263
Zoran G. Pavlović
For researchers and the academic community, it is of great interest to regulate traffic at intersections with several lanes. In certain periods during the day, the need to extend the interval of passage in certain directions at the intersection increases. In order to determine how to extend the interval, it is necessary to apply advanced technologies of the Internet of Intelligent Devices (IoT). Built-in sensors, in addition to the basic purpose of motion detection, also have the possibility of mutual communication as with other devices. The collection and immediate analysis of data in the database of the Traffic Dispatch Center (SDC) provides the service with information to improve the throughput of intersections in the direction that is most loaded. The main goal of the paper is to present an innovative model of traffic regulation of timely and immediate extension of the time interval for the necessary directions at the intersection.
{"title":"Development Of Models Of Smart Intersections In Urban Areas Based On IoT Technologies","authors":"Zoran G. Pavlović","doi":"10.1109/INFOTEH53737.2022.9751263","DOIUrl":"https://doi.org/10.1109/INFOTEH53737.2022.9751263","url":null,"abstract":"For researchers and the academic community, it is of great interest to regulate traffic at intersections with several lanes. In certain periods during the day, the need to extend the interval of passage in certain directions at the intersection increases. In order to determine how to extend the interval, it is necessary to apply advanced technologies of the Internet of Intelligent Devices (IoT). Built-in sensors, in addition to the basic purpose of motion detection, also have the possibility of mutual communication as with other devices. The collection and immediate analysis of data in the database of the Traffic Dispatch Center (SDC) provides the service with information to improve the throughput of intersections in the direction that is most loaded. The main goal of the paper is to present an innovative model of traffic regulation of timely and immediate extension of the time interval for the necessary directions at the intersection.","PeriodicalId":6839,"journal":{"name":"2022 21st International Symposium INFOTEH-JAHORINA (INFOTEH)","volume":"267 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2022-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79798393","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 : 2022-03-16DOI: 10.1109/INFOTEH53737.2022.9751266
Teodora Mindra, G. Florea, Oana Chenaru, R. Dobrescu, L. Toma
This paper presents a hybrid microgrid architecture (DC, AC and mix) to increase the energy efficiency of the system to different types of consumers, which can reduce the size and cost of those installations. Different modes of operation of the microgrid are discussed, based on the chosen architecture. The control strategy for increasing efficiency proposes a combination of a peak shaving algorithm with a time shifting algorithm in order to reduce the peak production in the battery and to move it to maximum consumption.
{"title":"Combined peak shaving/time shifting strategy for microgrid controlled renewable energy efficiency optimization","authors":"Teodora Mindra, G. Florea, Oana Chenaru, R. Dobrescu, L. Toma","doi":"10.1109/INFOTEH53737.2022.9751266","DOIUrl":"https://doi.org/10.1109/INFOTEH53737.2022.9751266","url":null,"abstract":"This paper presents a hybrid microgrid architecture (DC, AC and mix) to increase the energy efficiency of the system to different types of consumers, which can reduce the size and cost of those installations. Different modes of operation of the microgrid are discussed, based on the chosen architecture. The control strategy for increasing efficiency proposes a combination of a peak shaving algorithm with a time shifting algorithm in order to reduce the peak production in the battery and to move it to maximum consumption.","PeriodicalId":6839,"journal":{"name":"2022 21st International Symposium INFOTEH-JAHORINA (INFOTEH)","volume":"118 4 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2022-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80525198","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 : 2022-03-16DOI: 10.1109/INFOTEH53737.2022.9751307
Sara Lazarevic, Tamara Zuvela
Due to the amazing development of the internet, today if you don't transfer your business to the web it's like you don't even exist. That is why we are witnessing the growing development of web applications that allow users to complete all their tasks with only one click. Cinema is a partly complex system because many processes take place within it, so the focus of this paper is the automation of the process of booking and selling tickets for movie screenings in cinemas. This paper presents the development of a web-based information system that will enable its users to quickly and easily book tickets for movie screenings in the selected cinema.
{"title":"Design Of Information System To Support Movie Ticket Booking And Cinema Operations","authors":"Sara Lazarevic, Tamara Zuvela","doi":"10.1109/INFOTEH53737.2022.9751307","DOIUrl":"https://doi.org/10.1109/INFOTEH53737.2022.9751307","url":null,"abstract":"Due to the amazing development of the internet, today if you don't transfer your business to the web it's like you don't even exist. That is why we are witnessing the growing development of web applications that allow users to complete all their tasks with only one click. Cinema is a partly complex system because many processes take place within it, so the focus of this paper is the automation of the process of booking and selling tickets for movie screenings in cinemas. This paper presents the development of a web-based information system that will enable its users to quickly and easily book tickets for movie screenings in the selected cinema.","PeriodicalId":6839,"journal":{"name":"2022 21st International Symposium INFOTEH-JAHORINA (INFOTEH)","volume":"89 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2022-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80337438","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 : 2022-03-16DOI: 10.1109/INFOTEH53737.2022.9751297
Zoran G. Pavlović
In accordance with the current situation around the virus pandemic, the basic preconditions are being created for the application of electronic business technologies in companies whose activity is the transport of passengers in traffic. In this paper, an analysis of e-business technologies that can be applied in traffic is performed with an emphasis on increasing the quality of service, customer satisfaction as well as opportunities to improve financial profits in companies and increase the competitive advantage of transport services. The application of e-business technologies in companies also requires the reengineering of business activities that are applied, through the upgrade of existing computer systems with the application of innovative models and services based on mobile technologies.
{"title":"Technologies of electronic business in traffic","authors":"Zoran G. Pavlović","doi":"10.1109/INFOTEH53737.2022.9751297","DOIUrl":"https://doi.org/10.1109/INFOTEH53737.2022.9751297","url":null,"abstract":"In accordance with the current situation around the virus pandemic, the basic preconditions are being created for the application of electronic business technologies in companies whose activity is the transport of passengers in traffic. In this paper, an analysis of e-business technologies that can be applied in traffic is performed with an emphasis on increasing the quality of service, customer satisfaction as well as opportunities to improve financial profits in companies and increase the competitive advantage of transport services. The application of e-business technologies in companies also requires the reengineering of business activities that are applied, through the upgrade of existing computer systems with the application of innovative models and services based on mobile technologies.","PeriodicalId":6839,"journal":{"name":"2022 21st International Symposium INFOTEH-JAHORINA (INFOTEH)","volume":"21 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2022-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84809439","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 : 2022-03-16DOI: 10.1109/INFOTEH53737.2022.9751336
Bojan Derajić, I. Krcmar, P. Maric, P. Matić, D. Marčetić
Performance of digitally controlled speed servomechanisms is very important for the overall performance of modern motion control systems. Proportional and integral controller is simple, yet with clear physical interpretation. This controller, even when optimally tuned, due to fixed values of parameters might lead to a poor performance of the overall system. One way to resolve this problem is to use gradient descent optimisation of controller parameters, with simple update rules for a real time operation, and with intuitive graphical interpretation. However, gradient descent algorithms have slow convergence and decreased performance when operate in nonstationary and/or nonlinear environment. Learning rate normalisation gives time varying learning rate and minimised a posterior output error. Due to these facts, normalised gradient descent proportional and integral controller for digitally controlled speed servomechanism is presented in this paper. The recommended values of the algorithm parameters, based on convergence analysis, are proposed. Results of the experiments support the analysis.
{"title":"A Normalised Gradient Descent PI Controller For Speed Servomechanism","authors":"Bojan Derajić, I. Krcmar, P. Maric, P. Matić, D. Marčetić","doi":"10.1109/INFOTEH53737.2022.9751336","DOIUrl":"https://doi.org/10.1109/INFOTEH53737.2022.9751336","url":null,"abstract":"Performance of digitally controlled speed servomechanisms is very important for the overall performance of modern motion control systems. Proportional and integral controller is simple, yet with clear physical interpretation. This controller, even when optimally tuned, due to fixed values of parameters might lead to a poor performance of the overall system. One way to resolve this problem is to use gradient descent optimisation of controller parameters, with simple update rules for a real time operation, and with intuitive graphical interpretation. However, gradient descent algorithms have slow convergence and decreased performance when operate in nonstationary and/or nonlinear environment. Learning rate normalisation gives time varying learning rate and minimised a posterior output error. Due to these facts, normalised gradient descent proportional and integral controller for digitally controlled speed servomechanism is presented in this paper. The recommended values of the algorithm parameters, based on convergence analysis, are proposed. Results of the experiments support the analysis.","PeriodicalId":6839,"journal":{"name":"2022 21st International Symposium INFOTEH-JAHORINA (INFOTEH)","volume":"50 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2022-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90241131","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 : 2022-03-16DOI: 10.1109/INFOTEH53737.2022.9751333
Najla Delić, S. Grebović, S. Smaka, Harun Kartal
Overvoltages are unpredictable and extremely dangerous for the electric power system. The causes of overvoltages are different, but lightning is considered as one of the most serious causes of overvoltages. High voltage substations are one of the main parts of the power system whose faults caused by overvoltages can lead to outage of large part of power system. Therefore, overvoltage protection of a high voltage substation is very important. In order to protect the substation as much as possible from the effects of the overvoltages, it is necessary to implement elements that can help reduce these effects, for example surge arresters. This paper presents the effects of the use of surge arresters in high voltage, gas SF6 insulated substation, modeled in the EMTP-RV (Electromagnetic Transient Program-Restructured Version) software. An accurate representation of lightning surge incoming in the substation is very important because it strongly affects the design of overvoltage protection system. In this paper parameters of lightning strikes are determined using Sigma Slp software.
{"title":"Study of Lightning Overvoltages Protection of 400 kV Gas Insulated Substation","authors":"Najla Delić, S. Grebović, S. Smaka, Harun Kartal","doi":"10.1109/INFOTEH53737.2022.9751333","DOIUrl":"https://doi.org/10.1109/INFOTEH53737.2022.9751333","url":null,"abstract":"Overvoltages are unpredictable and extremely dangerous for the electric power system. The causes of overvoltages are different, but lightning is considered as one of the most serious causes of overvoltages. High voltage substations are one of the main parts of the power system whose faults caused by overvoltages can lead to outage of large part of power system. Therefore, overvoltage protection of a high voltage substation is very important. In order to protect the substation as much as possible from the effects of the overvoltages, it is necessary to implement elements that can help reduce these effects, for example surge arresters. This paper presents the effects of the use of surge arresters in high voltage, gas SF6 insulated substation, modeled in the EMTP-RV (Electromagnetic Transient Program-Restructured Version) software. An accurate representation of lightning surge incoming in the substation is very important because it strongly affects the design of overvoltage protection system. In this paper parameters of lightning strikes are determined using Sigma Slp software.","PeriodicalId":6839,"journal":{"name":"2022 21st International Symposium INFOTEH-JAHORINA (INFOTEH)","volume":"39 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2022-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79258999","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 : 2022-03-16DOI: 10.1109/INFOTEH53737.2022.9751260
A. Borodzhieva
The paper presents the application of inquiry-based learning and teamwork when teaching the topic “Kogge-Stone Adders” implemented with various computer-based tools, such as MS Excel, Logisim, ISE Project Navigator, LearningApps, as an approach for attractive presenting the topic to the students, their motivation for studying and improving their grades in the course.
本文介绍了研究性学习和团队合作在教学“Kogge-Stone Adders”主题时的应用，采用各种基于计算机的工具，如MS Excel, Logisim, ISE Project Navigator, LearningApps，作为一种吸引学生的方法，他们的学习动机和提高他们在课程中的成绩。
{"title":"Implementation of Kogge-Stone Adders Using Computer-Based Tools","authors":"A. Borodzhieva","doi":"10.1109/INFOTEH53737.2022.9751260","DOIUrl":"https://doi.org/10.1109/INFOTEH53737.2022.9751260","url":null,"abstract":"The paper presents the application of inquiry-based learning and teamwork when teaching the topic “Kogge-Stone Adders” implemented with various computer-based tools, such as MS Excel, Logisim, ISE Project Navigator, LearningApps, as an approach for attractive presenting the topic to the students, their motivation for studying and improving their grades in the course.","PeriodicalId":6839,"journal":{"name":"2022 21st International Symposium INFOTEH-JAHORINA (INFOTEH)","volume":"26 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2022-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78250485","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 : 2022-03-16DOI: 10.1109/INFOTEH53737.2022.9751281
Miloš Milovanović, Jordan Radosavljević, N. Arsic, Bojan Perović
This paper presents the results of power flow calculations in unbalanced three-phase radial distribution networks with nonlinear loads obtained using the decoupled harmonic power flow (DHPF) method. The method is based on three-phase models of distribution network components and the current injection technique. Performances of the method are evaluated on the standard IEEE 13-bus test network. The DHPF method is verified by comparing its results with those generated by the software tool for the analysis of transmission, distribution, and industrial electrical power systems (i.e., DIgSILENT PowerFactory). It is shown that the DHPF method for solving the harmonic power flow (HPF) problem in unbalanced three-phase distribution networks provides effective and high-quality solutions.
{"title":"A Power Flow Method for Unbalanced Three-Phase Distribution Networks with Nonlinear Loads","authors":"Miloš Milovanović, Jordan Radosavljević, N. Arsic, Bojan Perović","doi":"10.1109/INFOTEH53737.2022.9751281","DOIUrl":"https://doi.org/10.1109/INFOTEH53737.2022.9751281","url":null,"abstract":"This paper presents the results of power flow calculations in unbalanced three-phase radial distribution networks with nonlinear loads obtained using the decoupled harmonic power flow (DHPF) method. The method is based on three-phase models of distribution network components and the current injection technique. Performances of the method are evaluated on the standard IEEE 13-bus test network. The DHPF method is verified by comparing its results with those generated by the software tool for the analysis of transmission, distribution, and industrial electrical power systems (i.e., DIgSILENT PowerFactory). It is shown that the DHPF method for solving the harmonic power flow (HPF) problem in unbalanced three-phase distribution networks provides effective and high-quality solutions.","PeriodicalId":6839,"journal":{"name":"2022 21st International Symposium INFOTEH-JAHORINA (INFOTEH)","volume":"38 2 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2022-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78837384","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 : 2022-03-16DOI: 10.1109/INFOTEH53737.2022.9751244
Mirjana Beko, Ilija Knežević, Nemanja Pudar, Tatjana Dlabač, Špiro Ivošević
This paper considers the possibilities of application of shape memory alloys SMA in the maritime industry. The primary characteristic of SMAs is their ability to change shape and transform when exposed to a certain temperature. Various studies have focused on finding the ideal, functional and optimal characteristics of these materials and their alloys. The SMA alloy that stands out in particular, which is widely used in various industries and which has great potential for application in the maritime industry is the NiTi alloy. The results obtained in this paper by determining the chemical composition Energy Dispersive X-ray Spectroscopy (EDX) of NiTi alloy define its basic functional characteristics. The aim of the research is to point out the possibilities of applying shape memory alloys in the maritime industry in order to analyze the impact of the corrosion process on these alloys.
{"title":"Analysis of changes of NiTi alloys in different marine environments","authors":"Mirjana Beko, Ilija Knežević, Nemanja Pudar, Tatjana Dlabač, Špiro Ivošević","doi":"10.1109/INFOTEH53737.2022.9751244","DOIUrl":"https://doi.org/10.1109/INFOTEH53737.2022.9751244","url":null,"abstract":"This paper considers the possibilities of application of shape memory alloys SMA in the maritime industry. The primary characteristic of SMAs is their ability to change shape and transform when exposed to a certain temperature. Various studies have focused on finding the ideal, functional and optimal characteristics of these materials and their alloys. The SMA alloy that stands out in particular, which is widely used in various industries and which has great potential for application in the maritime industry is the NiTi alloy. The results obtained in this paper by determining the chemical composition Energy Dispersive X-ray Spectroscopy (EDX) of NiTi alloy define its basic functional characteristics. The aim of the research is to point out the possibilities of applying shape memory alloys in the maritime industry in order to analyze the impact of the corrosion process on these alloys.","PeriodicalId":6839,"journal":{"name":"2022 21st International Symposium INFOTEH-JAHORINA (INFOTEH)","volume":"6 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2022-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79802399","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 : 2022-03-16DOI: 10.1109/INFOTEH53737.2022.9751246
V. Tynchenko, V. Bukhtoyarov, D. Rogova, Aleksander Myrugin, Yu. N. Seregin, A. Bocharov
The article develops a software system module for modeling the brazing of spacecraft elements from widely used alloys based on induction heating. The approach proposed by the authors is based on the use of two-dimensional non-stationary heat conduction equations. A permanent heat source is added to these equations, because heating occurs due to eddy currents. The mathematical model proposed by the authors considers: the geometric parameters of the waveguides, the physical parameters of materials, the initial and boundary conditions, as well as the uneven distribution of the eddy current density in the waveguide. This approach allows you to simulate the brazing process for almost any materials with different geometric parameters used in the aerospace industry. In this work, we simulate the process of induction brazing of pipelines from Alloy 321 stainless steel (UNS S32100). The need to develop a module of the software system is due to: (1) high temperature of the board and the need to withstand the regime; (2) use of duct boxes to create a protective environment; (3) high material costs when developing a new technological process (for example, when brazing a larger pipe). As a result of this work, a software system module was developed and modeling of induction brazing of pipelines in protective environments from Alloy 321 stainless steel was carried out, the results of which are presented in the article.
{"title":"Software for modeling brazing process of spacecraft elements from widely used alloys","authors":"V. Tynchenko, V. Bukhtoyarov, D. Rogova, Aleksander Myrugin, Yu. N. Seregin, A. Bocharov","doi":"10.1109/INFOTEH53737.2022.9751246","DOIUrl":"https://doi.org/10.1109/INFOTEH53737.2022.9751246","url":null,"abstract":"The article develops a software system module for modeling the brazing of spacecraft elements from widely used alloys based on induction heating. The approach proposed by the authors is based on the use of two-dimensional non-stationary heat conduction equations. A permanent heat source is added to these equations, because heating occurs due to eddy currents. The mathematical model proposed by the authors considers: the geometric parameters of the waveguides, the physical parameters of materials, the initial and boundary conditions, as well as the uneven distribution of the eddy current density in the waveguide. This approach allows you to simulate the brazing process for almost any materials with different geometric parameters used in the aerospace industry. In this work, we simulate the process of induction brazing of pipelines from Alloy 321 stainless steel (UNS S32100). The need to develop a module of the software system is due to: (1) high temperature of the board and the need to withstand the regime; (2) use of duct boxes to create a protective environment; (3) high material costs when developing a new technological process (for example, when brazing a larger pipe). As a result of this work, a software system module was developed and modeling of induction brazing of pipelines in protective environments from Alloy 321 stainless steel was carried out, the results of which are presented in the article.","PeriodicalId":6839,"journal":{"name":"2022 21st International Symposium INFOTEH-JAHORINA (INFOTEH)","volume":"39 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2022-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77669737","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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