Pub Date : 2000-12-04DOI: 10.1109/ISIE.2000.930358
J. Tar, A. Szakál, I. Rudas, J. Bitó
This paper is a brief summary on a particular approach aiming at the creation of a new branch of soft computing (SC) for the special problem class of mechanical systems' control. To evade the development of intricate system models it is based on the idea of "situation dependent partial system identification" and uses simple uniform structures obtained from various Lie groups used in different fields of physics. These structures are far more lucid and more concentrated than that of "traditional" SC based on either Kolmogorov's approximation theorem or typical membership functions in fuzzy controllers. The "obscure" process of learning or parameter tuning seems to be replaceable by simple explicit algebraic procedures. Simulation examples are considered for a 3 DOF robot arm under unmodelled environmental interaction.
{"title":"Selection of different abstract groups for developing uniform structures to be used in adaptive control of robots","authors":"J. Tar, A. Szakál, I. Rudas, J. Bitó","doi":"10.1109/ISIE.2000.930358","DOIUrl":"https://doi.org/10.1109/ISIE.2000.930358","url":null,"abstract":"This paper is a brief summary on a particular approach aiming at the creation of a new branch of soft computing (SC) for the special problem class of mechanical systems' control. To evade the development of intricate system models it is based on the idea of \"situation dependent partial system identification\" and uses simple uniform structures obtained from various Lie groups used in different fields of physics. These structures are far more lucid and more concentrated than that of \"traditional\" SC based on either Kolmogorov's approximation theorem or typical membership functions in fuzzy controllers. The \"obscure\" process of learning or parameter tuning seems to be replaceable by simple explicit algebraic procedures. Simulation examples are considered for a 3 DOF robot arm under unmodelled environmental interaction.","PeriodicalId":298625,"journal":{"name":"ISIE'2000. Proceedings of the 2000 IEEE International Symposium on Industrial Electronics (Cat. No.00TH8543)","volume":"24 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121005674","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 : 2000-12-04DOI: 10.1109/ISIE.2000.930330
M. Carpita, D. Colombo, A. Monti
The traditional approach to permanent magnet machine control is based on the distinction between DC and AC machines. The main difference is that in DC machines, the FEM has a trapezoidal shape, while in the AC machines it has a sinusoidal shape. In the first case, typically a scalar two phase approach is applied, while in the second one a vector three phase approach is the typical structure. In a recent paper, the authors showed that for special purpose machines, it is not so easy to make this kind of distinction, both from modeling and control point of view. Starting from that, a unified approach to the control of isotropic permanent magnet machines is proposed, keeping the minimum of the torque ripple as main task. The algorithm is described in detail and the results are confirmed through experimental experiences.
{"title":"A generalised approach to torque ripple compensation in permanent magnet machine control","authors":"M. Carpita, D. Colombo, A. Monti","doi":"10.1109/ISIE.2000.930330","DOIUrl":"https://doi.org/10.1109/ISIE.2000.930330","url":null,"abstract":"The traditional approach to permanent magnet machine control is based on the distinction between DC and AC machines. The main difference is that in DC machines, the FEM has a trapezoidal shape, while in the AC machines it has a sinusoidal shape. In the first case, typically a scalar two phase approach is applied, while in the second one a vector three phase approach is the typical structure. In a recent paper, the authors showed that for special purpose machines, it is not so easy to make this kind of distinction, both from modeling and control point of view. Starting from that, a unified approach to the control of isotropic permanent magnet machines is proposed, keeping the minimum of the torque ripple as main task. The algorithm is described in detail and the results are confirmed through experimental experiences.","PeriodicalId":298625,"journal":{"name":"ISIE'2000. Proceedings of the 2000 IEEE International Symposium on Industrial Electronics (Cat. No.00TH8543)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123247491","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 : 2000-12-04DOI: 10.1109/ISIE.2000.930322
M. Gitau
Models to predict generation and propagation mechanisms of conducted EMI noise in switch mode converters comprising of a diode-bridge rectifier input stage, and a 250 kHz boost converter stage are presented. It is demonstrated that a converter employing ZVT PWM generates lower levels of both conducted and radiated EMI emissions compared with hard-switched PWM operation. It is also shown that the effect of active input current wave shaping is to slightly reduce common-mode conducted emissions but increase differential-mode conducted emissions. Additionally, it is shown that the presence of the boost inductor leads to quasi common-mode conduction and that the parasitic capacitance between main switching device's heat sink and ground plane primarily determines common-mode conducted emissions. Mathematical equations to predict both differential- and common-mode conducted emissions are derived. Experimental results and important operational waveforms obtained using a 750 W unit are presented and compared with analytical and simulated results.
{"title":"Modeling conducted EMI noise generation and propagation in boost converters","authors":"M. Gitau","doi":"10.1109/ISIE.2000.930322","DOIUrl":"https://doi.org/10.1109/ISIE.2000.930322","url":null,"abstract":"Models to predict generation and propagation mechanisms of conducted EMI noise in switch mode converters comprising of a diode-bridge rectifier input stage, and a 250 kHz boost converter stage are presented. It is demonstrated that a converter employing ZVT PWM generates lower levels of both conducted and radiated EMI emissions compared with hard-switched PWM operation. It is also shown that the effect of active input current wave shaping is to slightly reduce common-mode conducted emissions but increase differential-mode conducted emissions. Additionally, it is shown that the presence of the boost inductor leads to quasi common-mode conduction and that the parasitic capacitance between main switching device's heat sink and ground plane primarily determines common-mode conducted emissions. Mathematical equations to predict both differential- and common-mode conducted emissions are derived. Experimental results and important operational waveforms obtained using a 750 W unit are presented and compared with analytical and simulated results.","PeriodicalId":298625,"journal":{"name":"ISIE'2000. Proceedings of the 2000 IEEE International Symposium on Industrial Electronics (Cat. No.00TH8543)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114139910","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 : 2000-12-04DOI: 10.1109/ISIE.2000.930507
V. Salas, E. Olfus, C. Quinones, M. Vazquez, M. Rascon
This paper presents the results of an achieved designed method for an optimum combination of a hybrid power system (HPS) based on photovoltaic, battery and liquefied petroleum gas genset (PV/BAT/LPG) in remote telecommunications equipment. From the various forms of feeding such equipment independently to the public grid, a solution is proposed that combines two redundant sources (one of them renewable energy) procured to widen the availability with respect to PV and LPG stand-alone systems. Then, this hybrid system can guarantee the certainty of meeting load demands at all times at reasonable cost, for certain latitudes and escapes of the total dependency of the resources of the hydrocarbons and the economic viability of some other energetic alternatives. As an example for Braunschweig (Germany) the best combination reduces by 55% the total cost compared to PV stand-alone. In this way, hybrid power systems are oriented to be deployed in remote areas, outside of the central office, where utility lines are uneconomical to install due to terrain or environmental concerns.
{"title":"Application of hybrid power systems of low power to the remote radio equipment telecommunication","authors":"V. Salas, E. Olfus, C. Quinones, M. Vazquez, M. Rascon","doi":"10.1109/ISIE.2000.930507","DOIUrl":"https://doi.org/10.1109/ISIE.2000.930507","url":null,"abstract":"This paper presents the results of an achieved designed method for an optimum combination of a hybrid power system (HPS) based on photovoltaic, battery and liquefied petroleum gas genset (PV/BAT/LPG) in remote telecommunications equipment. From the various forms of feeding such equipment independently to the public grid, a solution is proposed that combines two redundant sources (one of them renewable energy) procured to widen the availability with respect to PV and LPG stand-alone systems. Then, this hybrid system can guarantee the certainty of meeting load demands at all times at reasonable cost, for certain latitudes and escapes of the total dependency of the resources of the hydrocarbons and the economic viability of some other energetic alternatives. As an example for Braunschweig (Germany) the best combination reduces by 55% the total cost compared to PV stand-alone. In this way, hybrid power systems are oriented to be deployed in remote areas, outside of the central office, where utility lines are uneconomical to install due to terrain or environmental concerns.","PeriodicalId":298625,"journal":{"name":"ISIE'2000. Proceedings of the 2000 IEEE International Symposium on Industrial Electronics (Cat. No.00TH8543)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114565133","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 : 2000-12-04DOI: 10.1109/ISIE.2000.930334
I. Ando, K. Utsunomiya, I. Takahashi
This paper describes about a simple construction of high speed source voltage sensorless method of a PWM converters. It has the following characteristics: (1) this sensorless method is realized only by adding two operational amplifiers for one phase and a one analog switch to a conventional PWM control circuit. Therefore, this method makes low cost and simple; and (2) by using a high speed PI circuit of source current control, a high speed response of a estimated source voltage is also obtained. It not only obtains excellent performances such as 99% power factor and 1.9% THD but also realizes small size, simple control construction and the low cost converter. It can be also applied to an active filter.
{"title":"A simple high speed sensorless method for PWM converter","authors":"I. Ando, K. Utsunomiya, I. Takahashi","doi":"10.1109/ISIE.2000.930334","DOIUrl":"https://doi.org/10.1109/ISIE.2000.930334","url":null,"abstract":"This paper describes about a simple construction of high speed source voltage sensorless method of a PWM converters. It has the following characteristics: (1) this sensorless method is realized only by adding two operational amplifiers for one phase and a one analog switch to a conventional PWM control circuit. Therefore, this method makes low cost and simple; and (2) by using a high speed PI circuit of source current control, a high speed response of a estimated source voltage is also obtained. It not only obtains excellent performances such as 99% power factor and 1.9% THD but also realizes small size, simple control construction and the low cost converter. It can be also applied to an active filter.","PeriodicalId":298625,"journal":{"name":"ISIE'2000. Proceedings of the 2000 IEEE International Symposium on Industrial Electronics (Cat. No.00TH8543)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124631041","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 : 2000-12-04DOI: 10.1109/ISIE.2000.930393
L. Vazquez, L. Rojas, E. Uribazo, J. Fuertes, A. Sudria
To couple the several devices in a distributed system control with other levels, it is necessary to use a gateway. In our case some development cards based in a microcontroller using a control area network (CAN) controller simulates an industrial network in the laboratory. The gateway is the PC including the CAN-ISA card and the software to control the communication system and monitoring from the LAN. As it is necessary to perform this coupling in real time, and the PC must work with other tasks, the gateway must be intelligent. This paper exposes the design criterion and the steps taken into account to get this device and the software implementation to guarantee the interconnection between the CAN and LAN. The interface card employs several hardware resources such as shared memory between microcontroller and PC, microcontroller's memory map dynamically configurable, control handshaking by interrupt, and it has employed the Xilinx tech using a programmable CPLD to reduce the hardware. This card has been designed and built by separate modules. These are prepared to teach and to permit upgrades with new emerging technologies. There are two software modules, one for the server linked to CAN bus and other for the client linked via the LAN for remote monitoring.
{"title":"Intelligent CAN-ISA gateway development to industrial networks and Internet coupling","authors":"L. Vazquez, L. Rojas, E. Uribazo, J. Fuertes, A. Sudria","doi":"10.1109/ISIE.2000.930393","DOIUrl":"https://doi.org/10.1109/ISIE.2000.930393","url":null,"abstract":"To couple the several devices in a distributed system control with other levels, it is necessary to use a gateway. In our case some development cards based in a microcontroller using a control area network (CAN) controller simulates an industrial network in the laboratory. The gateway is the PC including the CAN-ISA card and the software to control the communication system and monitoring from the LAN. As it is necessary to perform this coupling in real time, and the PC must work with other tasks, the gateway must be intelligent. This paper exposes the design criterion and the steps taken into account to get this device and the software implementation to guarantee the interconnection between the CAN and LAN. The interface card employs several hardware resources such as shared memory between microcontroller and PC, microcontroller's memory map dynamically configurable, control handshaking by interrupt, and it has employed the Xilinx tech using a programmable CPLD to reduce the hardware. This card has been designed and built by separate modules. These are prepared to teach and to permit upgrades with new emerging technologies. There are two software modules, one for the server linked to CAN bus and other for the client linked via the LAN for remote monitoring.","PeriodicalId":298625,"journal":{"name":"ISIE'2000. Proceedings of the 2000 IEEE International Symposium on Industrial Electronics (Cat. No.00TH8543)","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124786673","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 : 2000-12-04DOI: 10.1109/ISIE.2000.930365
N.A. Barragan-Mendoza, M. A. Perez-Garcia, J.C. Campo-Rodriguez, J.C. Alvarez-Anton
In this paper, a very simple and low-cost photodetection system is presented which can be used for measuring very low oxygen concentration in gaseous medium based on phosphorescence lifetime of Al-ferron in sol-gel probe. A similar system has been presented but the most innovative aspect in this work is in the use of avalanche photodiode (APD). APD has several important advantages over photomultiplier tubes (PMTs) such as a lower device size, low cost and less critical power supply requirements. The APD also has a good photosensitivity and low dark current, enough characteristics for measuring phosphorescence. So, this kind of device becomes very interesting for use in phosphorimetric systems.
{"title":"Photodetection of low level phosphorescence produced by low level oxygen concentrations using optical system based on fiber optical and avalanche photodiode","authors":"N.A. Barragan-Mendoza, M. A. Perez-Garcia, J.C. Campo-Rodriguez, J.C. Alvarez-Anton","doi":"10.1109/ISIE.2000.930365","DOIUrl":"https://doi.org/10.1109/ISIE.2000.930365","url":null,"abstract":"In this paper, a very simple and low-cost photodetection system is presented which can be used for measuring very low oxygen concentration in gaseous medium based on phosphorescence lifetime of Al-ferron in sol-gel probe. A similar system has been presented but the most innovative aspect in this work is in the use of avalanche photodiode (APD). APD has several important advantages over photomultiplier tubes (PMTs) such as a lower device size, low cost and less critical power supply requirements. The APD also has a good photosensitivity and low dark current, enough characteristics for measuring phosphorescence. So, this kind of device becomes very interesting for use in phosphorimetric systems.","PeriodicalId":298625,"journal":{"name":"ISIE'2000. Proceedings of the 2000 IEEE International Symposium on Industrial Electronics (Cat. No.00TH8543)","volume":"93 6 Pt 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129430153","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 : 2000-12-04DOI: 10.1109/ISIE.2000.930475
A. Guzmán, L. Sheremetov
An on-line system has been developed for on-line education, where each student has unique study needs. In EVA (virtual learning spaces), each student pursues his own syllabus, advances at his own pace, starts anytime, and uses material delivered by EVA. Collaboration with current "classmates" and use of historic information are also important ingredients. Interaction with the adviser is both synchronous and differed. This article briefly describes how EVA starts its first serious use: delivering an MSc Program in Computer Science to 500 remote students, called evanauts.
{"title":"Applying EVA to tailored virtual, distance, on-line education via Internet","authors":"A. Guzmán, L. Sheremetov","doi":"10.1109/ISIE.2000.930475","DOIUrl":"https://doi.org/10.1109/ISIE.2000.930475","url":null,"abstract":"An on-line system has been developed for on-line education, where each student has unique study needs. In EVA (virtual learning spaces), each student pursues his own syllabus, advances at his own pace, starts anytime, and uses material delivered by EVA. Collaboration with current \"classmates\" and use of historic information are also important ingredients. Interaction with the adviser is both synchronous and differed. This article briefly describes how EVA starts its first serious use: delivering an MSc Program in Computer Science to 500 remote students, called evanauts.","PeriodicalId":298625,"journal":{"name":"ISIE'2000. Proceedings of the 2000 IEEE International Symposium on Industrial Electronics (Cat. No.00TH8543)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129739524","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 : 2000-12-04DOI: 10.1109/ISIE.2000.930396
A. Stefano, L. L. Bello, T. Bangemann
This paper reports some results obtained by the authors within the Work Package 4 (WP4) of the ESPRIT project 26951-Network Oriented Application Harmonisation (NOAH). The main goal of the NOAH Project is to define concepts, models and tools as elements of an open platform for distributed automation systems as independent as possible of the available technologies. One of the points addressed in the NOAH Project is how to provide a common view of the system in such a way that any application, independent of its features, can be described by focusing on all the system composing elements including issues related to functional and physical distribution. The Data Base Repository (DBR) specification is the solution proposed to address this issue. It defines a common and general information model which provides a unified perspective for several activities including installation, configuration, maintenance and technical management, as well as a unified approach to the problem of describing complex distributed systems. In this work we deal with the specification of basic main operations to be carried out on the Database Repository. In particular, in the paper a description of data distribution in the NOAH model is given, and the Manager/Agent model, that is the basic interaction mode devised for data management, is introduced. Then data consistency issues in the NOAH DBR are outlined.
{"title":"Harmonized and consistent data management in distributed automation systems: the NOAH approach","authors":"A. Stefano, L. L. Bello, T. Bangemann","doi":"10.1109/ISIE.2000.930396","DOIUrl":"https://doi.org/10.1109/ISIE.2000.930396","url":null,"abstract":"This paper reports some results obtained by the authors within the Work Package 4 (WP4) of the ESPRIT project 26951-Network Oriented Application Harmonisation (NOAH). The main goal of the NOAH Project is to define concepts, models and tools as elements of an open platform for distributed automation systems as independent as possible of the available technologies. One of the points addressed in the NOAH Project is how to provide a common view of the system in such a way that any application, independent of its features, can be described by focusing on all the system composing elements including issues related to functional and physical distribution. The Data Base Repository (DBR) specification is the solution proposed to address this issue. It defines a common and general information model which provides a unified perspective for several activities including installation, configuration, maintenance and technical management, as well as a unified approach to the problem of describing complex distributed systems. In this work we deal with the specification of basic main operations to be carried out on the Database Repository. In particular, in the paper a description of data distribution in the NOAH model is given, and the Manager/Agent model, that is the basic interaction mode devised for data management, is introduced. Then data consistency issues in the NOAH DBR are outlined.","PeriodicalId":298625,"journal":{"name":"ISIE'2000. Proceedings of the 2000 IEEE International Symposium on Industrial Electronics (Cat. No.00TH8543)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123354242","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 : 2000-12-04DOI: 10.1109/ISIE.2000.930379
A. Soria
In this paper, fuzzy controller tuning is achieved using a neuro-fuzzy system. The author proposes a regression term to be introduced in the traditional neuro-fuzzy learning algorithm. Results concerning the real and the simulated system are also presented.
{"title":"Fuzzy controller tuning for a multivariable system using a neuro-fuzzy system","authors":"A. Soria","doi":"10.1109/ISIE.2000.930379","DOIUrl":"https://doi.org/10.1109/ISIE.2000.930379","url":null,"abstract":"In this paper, fuzzy controller tuning is achieved using a neuro-fuzzy system. The author proposes a regression term to be introduced in the traditional neuro-fuzzy learning algorithm. Results concerning the real and the simulated system are also presented.","PeriodicalId":298625,"journal":{"name":"ISIE'2000. Proceedings of the 2000 IEEE International Symposium on Industrial Electronics (Cat. No.00TH8543)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123473591","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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