There are abundant energy and resource minerals in the sea. It is effective for an AUV to move freely in the sea in order to efficiently investigate and utilize these resources, an AUV that moves freely in the sea is effective. The AUV depends on the battery capacity and has a short activity time, so it needs to be pulled out of the sea every time it is charged. In this paper, we examine a magnetic field coupling type wireless power transfer system in the sea to operate AUV efficiently. Using a metal pressure-resistant container such as an AUV, a transfer coil, and a receiving coil, we conduct an experiment of wireless power transfer of high power in salt water. The proposed method is the wireless power transfer system with high degree of freedom in position and transfer efficiency in seawater.
{"title":"A Highly Efficient and High Degree of Freedom of Position kW-class Wireless Power Transfer System in Seawater for Small AUVs","authors":"Ryosuke Hasaba, Tatsuo Yagi, Katsuya Okamoto, Souichi Kawata, Shuichiro Yamaguchi, Satoru Kotani, Kazuhiro Eguchi, Y. Koyanagi","doi":"10.1109/WPTC51349.2021.9457857","DOIUrl":"https://doi.org/10.1109/WPTC51349.2021.9457857","url":null,"abstract":"There are abundant energy and resource minerals in the sea. It is effective for an AUV to move freely in the sea in order to efficiently investigate and utilize these resources, an AUV that moves freely in the sea is effective. The AUV depends on the battery capacity and has a short activity time, so it needs to be pulled out of the sea every time it is charged. In this paper, we examine a magnetic field coupling type wireless power transfer system in the sea to operate AUV efficiently. Using a metal pressure-resistant container such as an AUV, a transfer coil, and a receiving coil, we conduct an experiment of wireless power transfer of high power in salt water. The proposed method is the wireless power transfer system with high degree of freedom in position and transfer efficiency in seawater.","PeriodicalId":130306,"journal":{"name":"2021 IEEE Wireless Power Transfer Conference (WPTC)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133655134","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 : 2021-06-01DOI: 10.1109/WPTC51349.2021.9458020
Í. V. Soares, F. M. Freitas, U. C. Resende
The Magnetic Resonant Wireless Power Transfer (RWPT) is one of the best suitable techniques for mid-range applications. Therefore, there are different approaches to enhance RWPT efficiency, many of them based on metamaterial devices. In this work, the GRadient-INdex (GRIN) technique is applied to increase the coupling between transmitter and receiver coils and collimate the magnetic field, reducing its dispersion. This proposed lens topology operates at 28 MHz and is formed by a 5x5 planar and periodic arrangement of Split Ring Resonators (SRR) unit cells. In each one, a lumped capacitor is added to reduce the lens’s size and radially create a refractive index gradient. Then, a four-coil RWPT system is designed at the same operating frequency. Finally, the coils and lenses are prototyped, and the RWPT efficiency is measured in three cases: without any lenses, with a conventional (uniform) metasurface, and with the proposed GRIN lens. The experimental results demonstrate that the RWPT efficiency, which is about 8% without any lenses, becomes almost four times higher (33%) after the inclusion of metasurface GRIN lenses. When the same measurement is carried out with a uniform lens, typical topology in literature, the obtained efficiency is 17.59%, nearly half of the obtained with the proposed metasurface.
{"title":"Efficiency Enhancement in Mid-Range RWPT Systems by GRIN Metasurface Lenses","authors":"Í. V. Soares, F. M. Freitas, U. C. Resende","doi":"10.1109/WPTC51349.2021.9458020","DOIUrl":"https://doi.org/10.1109/WPTC51349.2021.9458020","url":null,"abstract":"The Magnetic Resonant Wireless Power Transfer (RWPT) is one of the best suitable techniques for mid-range applications. Therefore, there are different approaches to enhance RWPT efficiency, many of them based on metamaterial devices. In this work, the GRadient-INdex (GRIN) technique is applied to increase the coupling between transmitter and receiver coils and collimate the magnetic field, reducing its dispersion. This proposed lens topology operates at 28 MHz and is formed by a 5x5 planar and periodic arrangement of Split Ring Resonators (SRR) unit cells. In each one, a lumped capacitor is added to reduce the lens’s size and radially create a refractive index gradient. Then, a four-coil RWPT system is designed at the same operating frequency. Finally, the coils and lenses are prototyped, and the RWPT efficiency is measured in three cases: without any lenses, with a conventional (uniform) metasurface, and with the proposed GRIN lens. The experimental results demonstrate that the RWPT efficiency, which is about 8% without any lenses, becomes almost four times higher (33%) after the inclusion of metasurface GRIN lenses. When the same measurement is carried out with a uniform lens, typical topology in literature, the obtained efficiency is 17.59%, nearly half of the obtained with the proposed metasurface.","PeriodicalId":130306,"journal":{"name":"2021 IEEE Wireless Power Transfer Conference (WPTC)","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129796149","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 : 2021-06-01DOI: 10.1109/wptc51349.2021.9457934
{"title":"[Copyright notice]","authors":"","doi":"10.1109/wptc51349.2021.9457934","DOIUrl":"https://doi.org/10.1109/wptc51349.2021.9457934","url":null,"abstract":"","PeriodicalId":130306,"journal":{"name":"2021 IEEE Wireless Power Transfer Conference (WPTC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122272310","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 : 2021-06-01DOI: 10.1109/WPTC51349.2021.9458228
I. Makin, H. Jabs, T. D. Mast, L. Radziemski
Devices used in healthcare applications frequently require powering. With the rapid development of implantable devices for disease treatment, as well as smart digital devices dedicated for healthcare operations, wireless charging of these systems is critical. The majority of wireless powering currently uses electromagnetic fields. This work describes the in vivo demonstration of Ultrasound Power Delivery (UPD) for charging Li-ion batteries, adequate for a gastro-esophageal junction (GEJ) neurostimulator device, while fulfilling the charging module’s space budget of 1.2 cc. Using the same 1 – 3 MHz UPD approach, this work describes the feasibility of charging batteries for smart devices intended for dedicated applications in a healthcare environment, with similar specifications as the wireless Qi-standard version 1.0.
{"title":"Demonstration of Healthcare-Specific Li-ion Battery Charging Using Ultrasound Power Delivery","authors":"I. Makin, H. Jabs, T. D. Mast, L. Radziemski","doi":"10.1109/WPTC51349.2021.9458228","DOIUrl":"https://doi.org/10.1109/WPTC51349.2021.9458228","url":null,"abstract":"Devices used in healthcare applications frequently require powering. With the rapid development of implantable devices for disease treatment, as well as smart digital devices dedicated for healthcare operations, wireless charging of these systems is critical. The majority of wireless powering currently uses electromagnetic fields. This work describes the in vivo demonstration of Ultrasound Power Delivery (UPD) for charging Li-ion batteries, adequate for a gastro-esophageal junction (GEJ) neurostimulator device, while fulfilling the charging module’s space budget of 1.2 cc. Using the same 1 – 3 MHz UPD approach, this work describes the feasibility of charging batteries for smart devices intended for dedicated applications in a healthcare environment, with similar specifications as the wireless Qi-standard version 1.0.","PeriodicalId":130306,"journal":{"name":"2021 IEEE Wireless Power Transfer Conference (WPTC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129095688","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 : 2021-06-01DOI: 10.1109/WPTC51349.2021.9457559
G. G. Buchmeier, A. Takacs, D. Dragomirescul, J. A. Ramos, A. F. Montilla
This paper introduces a new method for optimizing the efficiency of two planar coils for a wireless power transfer system, assuring a specific pre-defined efficiency over the entire given charging surface. The referred efficiency is calculated from the transmitter’s source to the receiver’s load. This study is based on rectangular shaped coils. The electrical parameters, coupling and efficiency of the system are calculated and optimized as function of their physical dimensions. Thus, taking those parameters into account a useful design tool is proposed here. One of many possible designs is presented as example, which proves by theoretical and simulation results that the receiver might be free-positioned over the surface of charging without losing efficiency. Results for a 13.56 MHz system show that more than 82 % of efficiency (load to transmitter coil) can be achieved for a 4 cm x4 cm receiver moving over a 12 cm x8 cm surface.
本文介绍了一种优化无线电力传输系统中两个平面线圈的效率的新方法，以确保在整个给定的充电表面上具有特定的预定义效率。参考效率是从发射机源到接收机负载计算的。这项研究是基于矩形线圈。对系统的电气参数、耦合和效率进行了计算和优化。因此，考虑到这些参数，这里提出了一个有用的设计工具。本文给出了多种可能的设计方案中的一种，通过理论和仿真结果证明，在不损失效率的情况下，接收器可以自由放置在充电面上。13.56 MHz系统的结果表明，在12 cm x8 cm表面上移动的4 cm x4 cm接收器可以实现82%以上的效率(负载到发射器线圈)。
{"title":"optimized Rectangular Planar Coil Design for Wireless Power Transfer with Free-Positioning","authors":"G. G. Buchmeier, A. Takacs, D. Dragomirescul, J. A. Ramos, A. F. Montilla","doi":"10.1109/WPTC51349.2021.9457559","DOIUrl":"https://doi.org/10.1109/WPTC51349.2021.9457559","url":null,"abstract":"This paper introduces a new method for optimizing the efficiency of two planar coils for a wireless power transfer system, assuring a specific pre-defined efficiency over the entire given charging surface. The referred efficiency is calculated from the transmitter’s source to the receiver’s load. This study is based on rectangular shaped coils. The electrical parameters, coupling and efficiency of the system are calculated and optimized as function of their physical dimensions. Thus, taking those parameters into account a useful design tool is proposed here. One of many possible designs is presented as example, which proves by theoretical and simulation results that the receiver might be free-positioned over the surface of charging without losing efficiency. Results for a 13.56 MHz system show that more than 82 % of efficiency (load to transmitter coil) can be achieved for a 4 cm x4 cm receiver moving over a 12 cm x8 cm surface.","PeriodicalId":130306,"journal":{"name":"2021 IEEE Wireless Power Transfer Conference (WPTC)","volume":"187 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124101541","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 : 2021-06-01DOI: 10.1109/WPTC51349.2021.9458006
Hussein Mahdi, B. Hoff, Trond Østrem
This paper studies the maximum available power of a dissipative capacitive power transfer (CPT) system submerged in seawater. The CPT system's maximum power capability is driven using the network theory, precisely the conjugate-image approach. The equations of the maximum available load power and the system's corresponding efficiency are expressed as a function of the capacitive coupling parameters. The experimental results demonstrate that the maximum available power and the corresponding efficiency decreases by a maximum of 10%, which occurs at 1.4 $mathrm{M}mathrm{H}mathrm{z}$, when the plates' separation distance change from 100 mm to 300 mm. Besides, the system has higher power transfer capability and higher efficiency at a low-frequency range than a high one. The maximum available load power decreases by about 22.5% when increasing the frequency from 300 $mathrm{k}mathrm{H}mathrm{z}$ to 1.4 $mathrm{M}mathrm{H}mathrm{z}$. Thus, the CPT system can provide a good solution to charge electric ships and underwater vehicles over a wide separation distance and low-frequency range.
{"title":"Maximum Available Power of Undersea Capacitive Coupling in a Wireless Power Transfer System","authors":"Hussein Mahdi, B. Hoff, Trond Østrem","doi":"10.1109/WPTC51349.2021.9458006","DOIUrl":"https://doi.org/10.1109/WPTC51349.2021.9458006","url":null,"abstract":"This paper studies the maximum available power of a dissipative capacitive power transfer (CPT) system submerged in seawater. The CPT system's maximum power capability is driven using the network theory, precisely the conjugate-image approach. The equations of the maximum available load power and the system's corresponding efficiency are expressed as a function of the capacitive coupling parameters. The experimental results demonstrate that the maximum available power and the corresponding efficiency decreases by a maximum of 10%, which occurs at 1.4 $mathrm{M}mathrm{H}mathrm{z}$, when the plates' separation distance change from 100 mm to 300 mm. Besides, the system has higher power transfer capability and higher efficiency at a low-frequency range than a high one. The maximum available load power decreases by about 22.5% when increasing the frequency from 300 $mathrm{k}mathrm{H}mathrm{z}$ to 1.4 $mathrm{M}mathrm{H}mathrm{z}$. Thus, the CPT system can provide a good solution to charge electric ships and underwater vehicles over a wide separation distance and low-frequency range.","PeriodicalId":130306,"journal":{"name":"2021 IEEE Wireless Power Transfer Conference (WPTC)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127995270","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 : 2021-06-01DOI: 10.1109/WPTC51349.2021.9458131
Jun Zhu, Zhimeng Xu, Yisheng Zhao, Z. Chen
In this paper, an adjustable coupling method is proposed to improve the transfer efficiency of magnetically coupled resonant wireless power transfer system (MCR-WPT) under various transfer distances. By changing the offset distance between the driving loop and the transmitter coil, the coupling coefficient was adjusted to make the MCR-WPT have a better transfer efficiency at various transfer distances. The efficiency of simulation is 41.1% higher than the original MCR-WPT and the experimental results are basically consistent with the simulation.
{"title":"An Adjustable Coupling Method for Planar Wireless Power Transfer System","authors":"Jun Zhu, Zhimeng Xu, Yisheng Zhao, Z. Chen","doi":"10.1109/WPTC51349.2021.9458131","DOIUrl":"https://doi.org/10.1109/WPTC51349.2021.9458131","url":null,"abstract":"In this paper, an adjustable coupling method is proposed to improve the transfer efficiency of magnetically coupled resonant wireless power transfer system (MCR-WPT) under various transfer distances. By changing the offset distance between the driving loop and the transmitter coil, the coupling coefficient was adjusted to make the MCR-WPT have a better transfer efficiency at various transfer distances. The efficiency of simulation is 41.1% higher than the original MCR-WPT and the experimental results are basically consistent with the simulation.","PeriodicalId":130306,"journal":{"name":"2021 IEEE Wireless Power Transfer Conference (WPTC)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115178959","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 : 2021-06-01DOI: 10.1109/WPTC51349.2021.9457870
R. Pereira, N. Carvalho, A. Georgiadis
The measurement of a microwave beam focus location was performed to validate theoretical results obtained previously using the quasioptical framework. The system in question is a preliminary set-up of a double reflector system designed for wireless power transfer studies. A very approximate value was achieved but the slight differences verified must be taken into account for the complete system experiment.
{"title":"Focus Location Measurement of a Quasioptical Double Reflector System","authors":"R. Pereira, N. Carvalho, A. Georgiadis","doi":"10.1109/WPTC51349.2021.9457870","DOIUrl":"https://doi.org/10.1109/WPTC51349.2021.9457870","url":null,"abstract":"The measurement of a microwave beam focus location was performed to validate theoretical results obtained previously using the quasioptical framework. The system in question is a preliminary set-up of a double reflector system designed for wireless power transfer studies. A very approximate value was achieved but the slight differences verified must be taken into account for the complete system experiment.","PeriodicalId":130306,"journal":{"name":"2021 IEEE Wireless Power Transfer Conference (WPTC)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126807252","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 : 2021-06-01DOI: 10.1109/WPTC51349.2021.9458135
Jaewon Rhee, Yujun Shin, Haerim Kim, Jongwook Kim, Changmin Lee, Sungryul Huh, Seongho Woo, Seokhyeon Son, Seungyoung Ahn
Various methods of wireless torque transfer have been introduced to the fields of applications and highly utilized. In this paper, a method of wirelessly transmitting torque to a magnetic material by generating a rotating magnetic field using multi-coils is proposed. The rotating magnetic field generated by the current flowing in the proposed coil arrangement can be proved by using Biot-Savart law. Therefore, when a magnetic material is placed between the proposed coils, torque is generated due to the rotating magnetic field. Furthermore, since the torque by the magnetic field is closely related to the current applied to the coils, so that the torque can be changed through current. The proposed method was verified through theoretical analysis and simulation.
{"title":"Wireless Torque Transfer using Rotating Magnetic Field with Multiple Coils","authors":"Jaewon Rhee, Yujun Shin, Haerim Kim, Jongwook Kim, Changmin Lee, Sungryul Huh, Seongho Woo, Seokhyeon Son, Seungyoung Ahn","doi":"10.1109/WPTC51349.2021.9458135","DOIUrl":"https://doi.org/10.1109/WPTC51349.2021.9458135","url":null,"abstract":"Various methods of wireless torque transfer have been introduced to the fields of applications and highly utilized. In this paper, a method of wirelessly transmitting torque to a magnetic material by generating a rotating magnetic field using multi-coils is proposed. The rotating magnetic field generated by the current flowing in the proposed coil arrangement can be proved by using Biot-Savart law. Therefore, when a magnetic material is placed between the proposed coils, torque is generated due to the rotating magnetic field. Furthermore, since the torque by the magnetic field is closely related to the current applied to the coils, so that the torque can be changed through current. The proposed method was verified through theoretical analysis and simulation.","PeriodicalId":130306,"journal":{"name":"2021 IEEE Wireless Power Transfer Conference (WPTC)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121091149","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 : 2021-06-01DOI: 10.1109/WPTC51349.2021.9457933
Lichen Yao, G. Dolmans, J. Romme
RF wireless power transfer (WPT) is an essential building block for simultaneous wireless information and power transfer (SWIPT) and wireless powered communication (WPC) systems. It has been shown that the efficiency of RF-DC conversion of a rectifier is dependent on both input power and the load resistance. In this paper, we present a novel analytical solution for the optimal load resistance in terms of DC power on the resistive load for two harvester topologies, namely the series-diode half-wave rectifier and Greinacher voltage doubler. Additionally, closed-form solutions are presented for low input power to obtain intuitive insights. The proposed method models the diode with the equivalent Schottky diode model, taking the parasitic and packaging effects into consideration. The validity of the method is verified by simulations with both continuous sinewave (CW) and multi-sinewave input.
{"title":"On the Analytical Optimal Load Resistance of RF Energy Rectifier","authors":"Lichen Yao, G. Dolmans, J. Romme","doi":"10.1109/WPTC51349.2021.9457933","DOIUrl":"https://doi.org/10.1109/WPTC51349.2021.9457933","url":null,"abstract":"RF wireless power transfer (WPT) is an essential building block for simultaneous wireless information and power transfer (SWIPT) and wireless powered communication (WPC) systems. It has been shown that the efficiency of RF-DC conversion of a rectifier is dependent on both input power and the load resistance. In this paper, we present a novel analytical solution for the optimal load resistance in terms of DC power on the resistive load for two harvester topologies, namely the series-diode half-wave rectifier and Greinacher voltage doubler. Additionally, closed-form solutions are presented for low input power to obtain intuitive insights. The proposed method models the diode with the equivalent Schottky diode model, taking the parasitic and packaging effects into consideration. The validity of the method is verified by simulations with both continuous sinewave (CW) and multi-sinewave input.","PeriodicalId":130306,"journal":{"name":"2021 IEEE Wireless Power Transfer Conference (WPTC)","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133714592","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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