Pub Date : 1999-11-29DOI: 10.1109/IECON.1999.819438
R. Monajemy, R. Krishnan
The operational envelope of electrical machines is limited by the maximum permissible power losses of the machine. The control and dynamics of the permanent magnet synchronous motor (PMSM) drive operating with constant power losses is proposed in this study. The proposed operational strategy is modeled and analyzed. Its comparison to other control strategies that limit current and power, demonstrates the superiority of the proposed scheme. The implementation of the proposed scheme is developed. It is achieved with an outer power loss feedback control loop. This has the advantage of retrofitting the present PMSM drives with the least amount of software/hardware effort. The PMSM drives in this case then can use the existing controllers to implement the control criteria such as constant torque angle, unity power factor, constant air gap flux linkages, maximum torque per unit current or maximum efficiency operation. Experimental verification of the control strategy is provided.
{"title":"Control and dynamics of constant power loss based operation of permanent magnet synchronous motor drive system","authors":"R. Monajemy, R. Krishnan","doi":"10.1109/IECON.1999.819438","DOIUrl":"https://doi.org/10.1109/IECON.1999.819438","url":null,"abstract":"The operational envelope of electrical machines is limited by the maximum permissible power losses of the machine. The control and dynamics of the permanent magnet synchronous motor (PMSM) drive operating with constant power losses is proposed in this study. The proposed operational strategy is modeled and analyzed. Its comparison to other control strategies that limit current and power, demonstrates the superiority of the proposed scheme. The implementation of the proposed scheme is developed. It is achieved with an outer power loss feedback control loop. This has the advantage of retrofitting the present PMSM drives with the least amount of software/hardware effort. The PMSM drives in this case then can use the existing controllers to implement the control criteria such as constant torque angle, unity power factor, constant air gap flux linkages, maximum torque per unit current or maximum efficiency operation. Experimental verification of the control strategy is provided.","PeriodicalId":378710,"journal":{"name":"IECON'99. Conference Proceedings. 25th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.99CH37029)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129724899","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 : 1999-11-29DOI: 10.1109/IECON.1999.816448
P. Ide, N. Froehleke, H. Grotstollen, W. Korb, B. Margaritis
A prominent boost-type 3-level topology, which is proved to represent a cost effective and highly efficient solution for switched mode rectifiers is inspected towards its application at wide input voltage range and power line distorted conditions including single-phase supply. Supplementary measures for a low cost control scheme are described to facilitate the operation under these unfavorable conditions. Shutdown of e.g. telecommunication plants can thus be avoided, if a maximum power limitation is observed. The inherent adaptation of the control scheme to the largely varying supply conditions supports the high yielding efficiency at high output voltage, even when supplied out of two phases. Simulation and measurement results prove the maturity of this rectifier scheme.
{"title":"Operation of a three-phase/three-level-rectifier in wide range and single-phase applications","authors":"P. Ide, N. Froehleke, H. Grotstollen, W. Korb, B. Margaritis","doi":"10.1109/IECON.1999.816448","DOIUrl":"https://doi.org/10.1109/IECON.1999.816448","url":null,"abstract":"A prominent boost-type 3-level topology, which is proved to represent a cost effective and highly efficient solution for switched mode rectifiers is inspected towards its application at wide input voltage range and power line distorted conditions including single-phase supply. Supplementary measures for a low cost control scheme are described to facilitate the operation under these unfavorable conditions. Shutdown of e.g. telecommunication plants can thus be avoided, if a maximum power limitation is observed. The inherent adaptation of the control scheme to the largely varying supply conditions supports the high yielding efficiency at high output voltage, even when supplied out of two phases. Simulation and measurement results prove the maturity of this rectifier scheme.","PeriodicalId":378710,"journal":{"name":"IECON'99. Conference Proceedings. 25th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.99CH37029)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129782952","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 : 1999-11-29DOI: 10.1109/IECON.1999.816492
Michael Condry, Ulrich, Pierre Delisle, Sun, Pal
This paper provides an overview of the architecture and specifications defined by the Open Service Gateway Initiative. Gateways are frequently needed to bridge between an internal "embedded control" industry environment and a broader networked environment, such as the Internet. The first section presents a brief overview of the OSGi. Next we present ServiceSpace, a small and efficient framework for writing network extensible applications. Using that framework, an application is defined as a set of components that can be deployed and managed independently of one another. The next section describes the set of components that the Open Service Gateway initiative requires as mandatory parts of a compliant residential gateway. These components provide support for network access (both as a client and a server), device management, and other utilities. The last section focuses on a simple example that makes use of both ServiceSpace and some of the required components.
本文提供了由开放服务网关计划定义的体系结构和规范的概述。网关经常需要在内部“嵌入式控制”工业环境和更广泛的网络环境(如Internet)之间架起桥梁。第一部分简要介绍了OSGi。接下来，我们将介绍ServiceSpace，一个用于编写网络可扩展应用程序的小型而高效的框架。使用该框架，应用程序被定义为一组组件，这些组件可以彼此独立地部署和管理。下一节将描述Open Service Gateway计划要求作为兼容住宅网关的强制部件的一组组件。这些组件为网络访问(作为客户机和服务器)、设备管理和其他实用程序提供支持。最后一节重点介绍一个简单的示例，该示例同时使用了ServiceSpace和一些必需的组件。
{"title":"Open Service Gateway architecture overview","authors":"Michael Condry, Ulrich, Pierre Delisle, Sun, Pal","doi":"10.1109/IECON.1999.816492","DOIUrl":"https://doi.org/10.1109/IECON.1999.816492","url":null,"abstract":"This paper provides an overview of the architecture and specifications defined by the Open Service Gateway Initiative. Gateways are frequently needed to bridge between an internal \"embedded control\" industry environment and a broader networked environment, such as the Internet. The first section presents a brief overview of the OSGi. Next we present ServiceSpace, a small and efficient framework for writing network extensible applications. Using that framework, an application is defined as a set of components that can be deployed and managed independently of one another. The next section describes the set of components that the Open Service Gateway initiative requires as mandatory parts of a compliant residential gateway. These components provide support for network access (both as a client and a server), device management, and other utilities. The last section focuses on a simple example that makes use of both ServiceSpace and some of the required components.","PeriodicalId":378710,"journal":{"name":"IECON'99. Conference Proceedings. 25th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.99CH37029)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130912173","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 : 1999-11-29DOI: 10.1109/IECON.1999.822235
S. P. Chan
By exploiting the particular characteristic of variable structure systems, a new approach is introduced to estimate a system perturbation signal from the dynamics of the sliding mode. Its implementation is simple and make use of the bound on perturbation estimation error. However, knowledge on the bounds of model parameter errors and external disturbances are not required. Perturbation feedforward compensation is then incorporated into the design of a control law which cancels the effects of system uncertainties and external disturbances. The robust control law ensures sliding mode reaching in finite time and with prescribed transient behaviour. This robust control technique is applied to the control of a servo system. Detailed computer simulation results are presented to demonstrate the effectiveness of this approach. Comparison is made with conventional variable structure control (VSC) method.
{"title":"Robust motion control using variable structure system with perturbation compensation","authors":"S. P. Chan","doi":"10.1109/IECON.1999.822235","DOIUrl":"https://doi.org/10.1109/IECON.1999.822235","url":null,"abstract":"By exploiting the particular characteristic of variable structure systems, a new approach is introduced to estimate a system perturbation signal from the dynamics of the sliding mode. Its implementation is simple and make use of the bound on perturbation estimation error. However, knowledge on the bounds of model parameter errors and external disturbances are not required. Perturbation feedforward compensation is then incorporated into the design of a control law which cancels the effects of system uncertainties and external disturbances. The robust control law ensures sliding mode reaching in finite time and with prescribed transient behaviour. This robust control technique is applied to the control of a servo system. Detailed computer simulation results are presented to demonstrate the effectiveness of this approach. Comparison is made with conventional variable structure control (VSC) method.","PeriodicalId":378710,"journal":{"name":"IECON'99. Conference Proceedings. 25th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.99CH37029)","volume":"119 4-5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132879643","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 : 1999-11-29DOI: 10.1109/IECON.1999.816483
Y. Takahashi, Y. Kikuchi, T. Ibaraki, T. Oohara, Y. Ishibashi, S. Ogawa
Two man-machine interfaces of assist robots are proposed in this paper. By using the proposed man-machine interfaces, a person who has some difficulty in moving his/her arm can actuate assist robots with little finger force. Two types of assist robots, three-dimensional manipulators, were fabricated in order to confirm the proposed two man-machine interfaces. The first man-machine interface is composed of three strain gages, and a user of the robot pinches an operation plate to move the robot. Operation place is limited to actuate the robot; however, the robot can be moved smoothly in three-dimensions. The second man-machine interface uses an acceleration pickup. The second method is sensitive to noise. A user of the robot can actuate the robot by pushing or pulling at any point of the robot, operation place is not limited. The characteristics of the two methods are discussed through the experiments using the fabricated assist robots.
{"title":"Man-machine interface of assist robot for aged person","authors":"Y. Takahashi, Y. Kikuchi, T. Ibaraki, T. Oohara, Y. Ishibashi, S. Ogawa","doi":"10.1109/IECON.1999.816483","DOIUrl":"https://doi.org/10.1109/IECON.1999.816483","url":null,"abstract":"Two man-machine interfaces of assist robots are proposed in this paper. By using the proposed man-machine interfaces, a person who has some difficulty in moving his/her arm can actuate assist robots with little finger force. Two types of assist robots, three-dimensional manipulators, were fabricated in order to confirm the proposed two man-machine interfaces. The first man-machine interface is composed of three strain gages, and a user of the robot pinches an operation plate to move the robot. Operation place is limited to actuate the robot; however, the robot can be moved smoothly in three-dimensions. The second man-machine interface uses an acceleration pickup. The second method is sensitive to noise. A user of the robot can actuate the robot by pushing or pulling at any point of the robot, operation place is not limited. The characteristics of the two methods are discussed through the experiments using the fabricated assist robots.","PeriodicalId":378710,"journal":{"name":"IECON'99. Conference Proceedings. 25th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.99CH37029)","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134630496","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 : 1999-11-29DOI: 10.1109/IECON.1999.819445
G. Han, Dong-II Kim, Hyo-Gyu Kim, K. Nam, Byeong-Kap Choi, Sung-Ku Kim
This paper introduces a high speed machining algorithm based on a look-ahead interpolation technique for the machining of 3D surface obtained by a CAD/CAM system. Generally, specification of CNC system for high speed machining requires an additional hardware and it burdens end users with additional cost. The purpose of this research is to develop the low cost CNC controller having the high speed machining ability. The experimental results demonstrate that the proposed algorithm improves the machining speed in the program consisting of small line blocks without any hardware support. To investigate the performance of the introduced algorithm, the authors implemented it to the machining center equipped with Samsung SNC that consists of a 64 bit main processor and a 32 bit floating point DSP as the motion control CPU.
{"title":"A high speed machining algorithm for CNC machine tools","authors":"G. Han, Dong-II Kim, Hyo-Gyu Kim, K. Nam, Byeong-Kap Choi, Sung-Ku Kim","doi":"10.1109/IECON.1999.819445","DOIUrl":"https://doi.org/10.1109/IECON.1999.819445","url":null,"abstract":"This paper introduces a high speed machining algorithm based on a look-ahead interpolation technique for the machining of 3D surface obtained by a CAD/CAM system. Generally, specification of CNC system for high speed machining requires an additional hardware and it burdens end users with additional cost. The purpose of this research is to develop the low cost CNC controller having the high speed machining ability. The experimental results demonstrate that the proposed algorithm improves the machining speed in the program consisting of small line blocks without any hardware support. To investigate the performance of the introduced algorithm, the authors implemented it to the machining center equipped with Samsung SNC that consists of a 64 bit main processor and a 32 bit floating point DSP as the motion control CPU.","PeriodicalId":378710,"journal":{"name":"IECON'99. Conference Proceedings. 25th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.99CH37029)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133692032","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 : 1999-11-29DOI: 10.1109/IECON.1999.819407
S. Peresada, A. Tilli, A. Tonielli
In this paper a new output feedback control of a doubly-fed induction machine is presented. It provides robust regulation of the primary side active and reactive currents and it is suitable for both electric energy generation and drive applications. The control algorithm is designed in the stator (line) voltage vector oriented reference frame using only stator currents and rotor speed/position as feedback signals. Robustness properties with respect to inaccurate rotor angle position measurement and resistances variations are demonstrated by simulation and experimental tests.
{"title":"Robust output feedback control of a doubly-fed induction machine","authors":"S. Peresada, A. Tilli, A. Tonielli","doi":"10.1109/IECON.1999.819407","DOIUrl":"https://doi.org/10.1109/IECON.1999.819407","url":null,"abstract":"In this paper a new output feedback control of a doubly-fed induction machine is presented. It provides robust regulation of the primary side active and reactive currents and it is suitable for both electric energy generation and drive applications. The control algorithm is designed in the stator (line) voltage vector oriented reference frame using only stator currents and rotor speed/position as feedback signals. Robustness properties with respect to inaccurate rotor angle position measurement and resistances variations are demonstrated by simulation and experimental tests.","PeriodicalId":378710,"journal":{"name":"IECON'99. Conference Proceedings. 25th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.99CH37029)","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132117011","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 : 1999-11-29DOI: 10.1109/IECON.1999.822197
Han-Jong Kim, Geun-Ho Lee, Cheol-Ho Jang, Jea-Pil Lee
In this paper, the cost-effective design of an output reactor which is used to suppress the overvoltage at the motor terminal in the adjustable speed drives (ASD) application is proposed. In the elevator drive system, the power cable length is relatively shorter than other ASD applications and then the overvoltage at the motor terminal depends on the frequency characteristics of the output reactor at the overvoltage operating frequency. The overvoltage suppression mechanism of the output reactor in ASD application is analyzed and the dominant parameters of the output reactor for the overvoltage suppression are extracted. Using these parameters as the design values and considering the high frequency characteristics of the iron core in the reactor, a new cost-effective structure of output reactor is proposed. Experimental results of the conventional reactor and the proposed reactor with a 15 kW induction motor are given to verify the proposed scheme.
{"title":"Cost-effective design of an inverter output reactor in ASD applications","authors":"Han-Jong Kim, Geun-Ho Lee, Cheol-Ho Jang, Jea-Pil Lee","doi":"10.1109/IECON.1999.822197","DOIUrl":"https://doi.org/10.1109/IECON.1999.822197","url":null,"abstract":"In this paper, the cost-effective design of an output reactor which is used to suppress the overvoltage at the motor terminal in the adjustable speed drives (ASD) application is proposed. In the elevator drive system, the power cable length is relatively shorter than other ASD applications and then the overvoltage at the motor terminal depends on the frequency characteristics of the output reactor at the overvoltage operating frequency. The overvoltage suppression mechanism of the output reactor in ASD application is analyzed and the dominant parameters of the output reactor for the overvoltage suppression are extracted. Using these parameters as the design values and considering the high frequency characteristics of the iron core in the reactor, a new cost-effective structure of output reactor is proposed. Experimental results of the conventional reactor and the proposed reactor with a 15 kW induction motor are given to verify the proposed scheme.","PeriodicalId":378710,"journal":{"name":"IECON'99. Conference Proceedings. 25th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.99CH37029)","volume":"142 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132220962","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 : 1999-11-29DOI: 10.1109/IECON.1999.816438
Xiaomang Zhang, N. Kubo, Y. Obuchi, T. Kanbe
A CCD sensor array in a digital camera can receive damage from alpha particles, protons and X-rays etc. At present, the damaged sensors can be treated only at the manufacturer's service station and this is usually time consuming and costly. In this paper, the authors propose a new algorithm for diagnosing CCD sensor arrays in digital cameras, which can be implemented in the camera and executed by consumers conveniently. The defective sensors are detected through checking the estimated parameters of their photoelectric model. The data acquisition for parameter estimating is realized by utilizing basic functions built in a camera like auto focus, auto exposure etc. Finally, the proposed algorithm is implemented on a digital still camera evaluating board to diagnose the CCD sensor arrays, which demonstrated satisfactory results.
{"title":"An approach to detect defective CCD in digital cameras","authors":"Xiaomang Zhang, N. Kubo, Y. Obuchi, T. Kanbe","doi":"10.1109/IECON.1999.816438","DOIUrl":"https://doi.org/10.1109/IECON.1999.816438","url":null,"abstract":"A CCD sensor array in a digital camera can receive damage from alpha particles, protons and X-rays etc. At present, the damaged sensors can be treated only at the manufacturer's service station and this is usually time consuming and costly. In this paper, the authors propose a new algorithm for diagnosing CCD sensor arrays in digital cameras, which can be implemented in the camera and executed by consumers conveniently. The defective sensors are detected through checking the estimated parameters of their photoelectric model. The data acquisition for parameter estimating is realized by utilizing basic functions built in a camera like auto focus, auto exposure etc. Finally, the proposed algorithm is implemented on a digital still camera evaluating board to diagnose the CCD sensor arrays, which demonstrated satisfactory results.","PeriodicalId":378710,"journal":{"name":"IECON'99. Conference Proceedings. 25th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.99CH37029)","volume":"470-471 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133642779","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 : 1999-11-29DOI: 10.1109/IECON.1999.822184
J.-H. Lee, H. Hashimoto
Intelligent Spaces are rooms or areas that are equipped with sensors and actuators which enable the spaces to perceive and understand what is happening in them. The Intelligent Spaces are expected to have a broad range of applications such as in homes, offices, factories etc. The Intelligent Space was proposed in 1995 by Hashimoto Lab. of University of Tokyo. Its brief history and explanation are introduced in this paper.
{"title":"Intelligent Space, its past and future","authors":"J.-H. Lee, H. Hashimoto","doi":"10.1109/IECON.1999.822184","DOIUrl":"https://doi.org/10.1109/IECON.1999.822184","url":null,"abstract":"Intelligent Spaces are rooms or areas that are equipped with sensors and actuators which enable the spaces to perceive and understand what is happening in them. The Intelligent Spaces are expected to have a broad range of applications such as in homes, offices, factories etc. The Intelligent Space was proposed in 1995 by Hashimoto Lab. of University of Tokyo. Its brief history and explanation are introduced in this paper.","PeriodicalId":378710,"journal":{"name":"IECON'99. Conference Proceedings. 25th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.99CH37029)","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132594367","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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