Pub Date : 2013-05-15DOI: 10.1109/WPT.2013.6556915
G. Franceschetti, G. Oliveri, P. Rocca, A. Massa
An overview of recent advances in the framework of remote wireless power transmission (WPT), currently under development at the ELEDIA Research Center of the University of Trento, are presented. Theoretical studies on the effects and interactions between electromagnetic waves and material media, when dealing with high-power density radiations, the synthesis of transmitting arrays with simplified architectures, and the design of innovative rectenna systems are discussed. Selected representative examples are reported to show the effectiveness and potentialities of some of the proposed solutions.
{"title":"Advances on remote wireless power transmission at the ELEDIA research center","authors":"G. Franceschetti, G. Oliveri, P. Rocca, A. Massa","doi":"10.1109/WPT.2013.6556915","DOIUrl":"https://doi.org/10.1109/WPT.2013.6556915","url":null,"abstract":"An overview of recent advances in the framework of remote wireless power transmission (WPT), currently under development at the ELEDIA Research Center of the University of Trento, are presented. Theoretical studies on the effects and interactions between electromagnetic waves and material media, when dealing with high-power density radiations, the synthesis of transmitting arrays with simplified architectures, and the design of innovative rectenna systems are discussed. Selected representative examples are reported to show the effectiveness and potentialities of some of the proposed solutions.","PeriodicalId":143468,"journal":{"name":"2013 IEEE Wireless Power Transfer (WPT)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116799262","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 : 2013-05-15DOI: 10.1109/WPT.2013.6556926
J. Nadakuduti, Lin Lu, P. Guckian
Loosely-coupled (LC) wireless power transfer (WPT) systems based on non-radiative magnetic resonance are finding day to day applications in charging portable consumer electronics. A key design choice is the WPT operating frequency. The frequency range from several kHz to several MHz, but generally below 10 MHz, is of particular interest. In this paper, we discuss the LC WPT operating frequency selection in terms of the existing regulatory framework and requirements for RF emissions and RF exposure. Quantities of interest include freespace electric and magnetic fields, induced electric field, induced current density and specific absorption rate (SAR) in human tissue. We recommend LC WPT to be operated in an ISM band for RF emissions compliance.
{"title":"Operating frequency selection for loosely coupled wireless power transfer systems with respect to RF emissions and RF exposure requirements","authors":"J. Nadakuduti, Lin Lu, P. Guckian","doi":"10.1109/WPT.2013.6556926","DOIUrl":"https://doi.org/10.1109/WPT.2013.6556926","url":null,"abstract":"Loosely-coupled (LC) wireless power transfer (WPT) systems based on non-radiative magnetic resonance are finding day to day applications in charging portable consumer electronics. A key design choice is the WPT operating frequency. The frequency range from several kHz to several MHz, but generally below 10 MHz, is of particular interest. In this paper, we discuss the LC WPT operating frequency selection in terms of the existing regulatory framework and requirements for RF emissions and RF exposure. Quantities of interest include freespace electric and magnetic fields, induced electric field, induced current density and specific absorption rate (SAR) in human tissue. We recommend LC WPT to be operated in an ISM band for RF emissions compliance.","PeriodicalId":143468,"journal":{"name":"2013 IEEE Wireless Power Transfer (WPT)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116120601","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 : 2013-05-15DOI: 10.1109/WPT.2013.6556873
S. Iguchi, Pyungwoo Yeon, H. Fuketa, K. Ishida, T. Sakurai, M. Takamiya
In a magnetically resonant wireless power transmission system, a DC-DC power transmission efficiency (ηTOTAL) at an inherent resonant frequency (fRES) is degraded when the distance between a transmitter (TX) coil and a receiver (RX) coil is short, because the frequency dependence of ηTOTAL has two peaks. In order to solve the efficiency degradation, a zero phase difference capacitance control (ZPDCC) is proposed, which is suitable for the integration to LSI's. In ZPDCC, either of the two peaks is shifted to fRES and ηTOTAL is increased by tuning the capacitance (C) of the resonator in TX and RX to keep the zero phase difference (θ = 0) between the voltage and the current in TX at Δθ / ΔC > 0. Both TX and RX circuits are fabricated in a 3.3V, 180nm CMOS. By introducing ZPDCC, the measured ηTOTAL at fRES of 13.56MHz increases 1.7 times from 16% to 27% at the distance of 2.5mm between the TX and RX coils with a diameter of 40mm.
{"title":"Zero phase difference capacitance control (ZPDCC) for magnetically resonant wireless power transmission","authors":"S. Iguchi, Pyungwoo Yeon, H. Fuketa, K. Ishida, T. Sakurai, M. Takamiya","doi":"10.1109/WPT.2013.6556873","DOIUrl":"https://doi.org/10.1109/WPT.2013.6556873","url":null,"abstract":"In a magnetically resonant wireless power transmission system, a DC-DC power transmission efficiency (η<sub>TOTAL</sub>) at an inherent resonant frequency (f<sub>RES</sub>) is degraded when the distance between a transmitter (TX) coil and a receiver (RX) coil is short, because the frequency dependence of η<sub>TOTAL</sub> has two peaks. In order to solve the efficiency degradation, a zero phase difference capacitance control (ZPDCC) is proposed, which is suitable for the integration to LSI's. In ZPDCC, either of the two peaks is shifted to fRES and η<sub>TOTAL</sub> is increased by tuning the capacitance (C) of the resonator in TX and RX to keep the zero phase difference (θ = 0) between the voltage and the current in TX at Δθ / ΔC > 0. Both TX and RX circuits are fabricated in a 3.3V, 180nm CMOS. By introducing ZPDCC, the measured η<sub>TOTAL</sub> at fRES of 13.56MHz increases 1.7 times from 16% to 27% at the distance of 2.5mm between the TX and RX coils with a diameter of 40mm.","PeriodicalId":143468,"journal":{"name":"2013 IEEE Wireless Power Transfer (WPT)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116271899","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 : 2013-05-15DOI: 10.1109/WPT.2013.6556889
Ryo Umesao, J. Ida, K. Kawabata, Sou Tashino, K. Noguchi, K. Itoh
For realization of the RF energy harvesting of the ultra low power RF input, the gate controlled diodes (GCD) which can achieve the near zero turn-on voltage were compared with the conventional PN-diode's (PND) and the Schottky Barrier Diode's (SBD). The results of the measurement and the theoretical calculations show that the on-resistance of the GCD could be less than the PND's and also the SBD's, when compared with the same area. It is due to the scaling of MOS. The mechanism of the leakage current of the GCD was analysed from the measurements. It is found that the gate induced drain leakage (GIDL) and the diffusion current are contributed to the leakage current of the GCD. Therefore, it is pointed out that the thickness of the gate oxide and the threshold voltage (Vt) of MOS should be optimized, in order to reduce the leakage of the GCD. From examination of the curvature coefficient γ which represents the efficiency of rectification, it was found for the first time that the γ of the SOI_GCD with the optimum gate oxide thickness and the Vt exceeds the γ of the PND's and the SBD's. The SOI_GCD was also found to be excellent at the product of RsC0 which the C0 affects the efficiency of rectification, especially at the high frequency. Thus, the most desirable device for the RF energy harvesting will be obtained by optimizing the gate oxide thickness and the Vt of the SOI_GCD.
{"title":"High efficiency rectification by SOI based gate controlled diode for RF energy harvesting","authors":"Ryo Umesao, J. Ida, K. Kawabata, Sou Tashino, K. Noguchi, K. Itoh","doi":"10.1109/WPT.2013.6556889","DOIUrl":"https://doi.org/10.1109/WPT.2013.6556889","url":null,"abstract":"For realization of the RF energy harvesting of the ultra low power RF input, the gate controlled diodes (GCD) which can achieve the near zero turn-on voltage were compared with the conventional PN-diode's (PND) and the Schottky Barrier Diode's (SBD). The results of the measurement and the theoretical calculations show that the on-resistance of the GCD could be less than the PND's and also the SBD's, when compared with the same area. It is due to the scaling of MOS. The mechanism of the leakage current of the GCD was analysed from the measurements. It is found that the gate induced drain leakage (GIDL) and the diffusion current are contributed to the leakage current of the GCD. Therefore, it is pointed out that the thickness of the gate oxide and the threshold voltage (Vt) of MOS should be optimized, in order to reduce the leakage of the GCD. From examination of the curvature coefficient γ which represents the efficiency of rectification, it was found for the first time that the γ of the SOI_GCD with the optimum gate oxide thickness and the Vt exceeds the γ of the PND's and the SBD's. The SOI_GCD was also found to be excellent at the product of RsC0 which the C0 affects the efficiency of rectification, especially at the high frequency. Thus, the most desirable device for the RF energy harvesting will be obtained by optimizing the gate oxide thickness and the Vt of the SOI_GCD.","PeriodicalId":143468,"journal":{"name":"2013 IEEE Wireless Power Transfer (WPT)","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127523136","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 : 2013-05-15DOI: 10.1109/WPT.2013.6556897
S. Korhummel, D. Kuester, Z. Popovic
A 900 MHz low-cost flexible omni-directional rectenna with a mass of 2.1 grams is demonstrated. A rectenna as demonstrated here employs only a Schottky diode, a capacitor, and a printed coplanar circuit which presents class-F harmonic terminations to the diode, resulting in approximately 48.6% efficiency at a low 8 μW/cm2 incident power density. The rectenna is printed on 0.13 mm PET with a commercial printing process depositing 1 μm-thick conductive traces.
{"title":"A harmonically-terminated two-gram low-power rectenna on a flexible substrate","authors":"S. Korhummel, D. Kuester, Z. Popovic","doi":"10.1109/WPT.2013.6556897","DOIUrl":"https://doi.org/10.1109/WPT.2013.6556897","url":null,"abstract":"A 900 MHz low-cost flexible omni-directional rectenna with a mass of 2.1 grams is demonstrated. A rectenna as demonstrated here employs only a Schottky diode, a capacitor, and a printed coplanar circuit which presents class-F harmonic terminations to the diode, resulting in approximately 48.6% efficiency at a low 8 μW/cm2 incident power density. The rectenna is printed on 0.13 mm PET with a commercial printing process depositing 1 μm-thick conductive traces.","PeriodicalId":143468,"journal":{"name":"2013 IEEE Wireless Power Transfer (WPT)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114191882","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 : 2013-05-15DOI: 10.1109/WPT.2013.6556918
T. Ishizaki, Genta Kitano
A novel Mobile-WPT system is proposed. Impedance matching circuit is separated from resonator and it becomes controllable by variable capacitors. Also, reflection wave back to power source is suppressed by the combination of pick-up and reflector in the receiving unit. Performance fluctuations due to the position shift of vehicle are examined. The performances are not changed so much for both horizontal shift and vertical shift owing to the matching circuit. An experimental system is designed and fabricated. Excellent performance which is well agreed with simulated performance is obtained.
{"title":"Mobile wireless power transfer system suppressing reflection by pick-up and reflector","authors":"T. Ishizaki, Genta Kitano","doi":"10.1109/WPT.2013.6556918","DOIUrl":"https://doi.org/10.1109/WPT.2013.6556918","url":null,"abstract":"A novel Mobile-WPT system is proposed. Impedance matching circuit is separated from resonator and it becomes controllable by variable capacitors. Also, reflection wave back to power source is suppressed by the combination of pick-up and reflector in the receiving unit. Performance fluctuations due to the position shift of vehicle are examined. The performances are not changed so much for both horizontal shift and vertical shift owing to the matching circuit. An experimental system is designed and fabricated. Excellent performance which is well agreed with simulated performance is obtained.","PeriodicalId":143468,"journal":{"name":"2013 IEEE Wireless Power Transfer (WPT)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134329181","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 : 2013-05-15DOI: 10.1109/WPT.2013.6556925
Ying Yi, U. Buttner, Yiqiang Fan, I. Foulds
This paper presents a 3-coil resonance-based wireless power transfer (R-WPT) system using a single layer of inductor coil windings, in a pancake configuration, in order to obtain a compact system for implantable electronic applications. A theoretical analysis and experimental measurements in terms of quality factor Q and power transfer efficiency (PTE), was done. Our proposed 3-coil scheme can achieve a high PTE with a resonance frequency of 2.46 MHz over a transfer distance of up to 30 mm, by using two 15-mm radius implant coils. The achieved experimental PTE is more than 85% at a 5 mm separation distance, and about 50% PTE at a distance of 20 mm.
{"title":"3-Coil resonance-based wireless power transfer system for implantable electronic","authors":"Ying Yi, U. Buttner, Yiqiang Fan, I. Foulds","doi":"10.1109/WPT.2013.6556925","DOIUrl":"https://doi.org/10.1109/WPT.2013.6556925","url":null,"abstract":"This paper presents a 3-coil resonance-based wireless power transfer (R-WPT) system using a single layer of inductor coil windings, in a pancake configuration, in order to obtain a compact system for implantable electronic applications. A theoretical analysis and experimental measurements in terms of quality factor Q and power transfer efficiency (PTE), was done. Our proposed 3-coil scheme can achieve a high PTE with a resonance frequency of 2.46 MHz over a transfer distance of up to 30 mm, by using two 15-mm radius implant coils. The achieved experimental PTE is more than 85% at a 5 mm separation distance, and about 50% PTE at a distance of 20 mm.","PeriodicalId":143468,"journal":{"name":"2013 IEEE Wireless Power Transfer (WPT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127260224","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 : 2013-05-15DOI: 10.1109/WPT.2013.6556867
Z. Popovic
This paper presents an overview of a system for wireless far-field powering of unattended distributed wireless sensors, including the power reception device design and optimization, power transmission, power management and control. Design and measured data of implementations of the various parts of the system in the 2GHz cellular and 2.45GHz unlicensed bands will be shown. A design methodology for antennas integrated with rectifiers (rectennas) optimized for efficiency at low incident power levels (5-100uW/cm2) will be presented. Integration of rectenna elements and arrays with the electronic application (wireless sensing in this case) requires power management, and some approaches that consume very low power levels will be presented. Possible applications such as sensors for comfort, performance and security of commercial and residential buildings will be discussed.
{"title":"Far-field wireless power delivery and power management for low-power sensors","authors":"Z. Popovic","doi":"10.1109/WPT.2013.6556867","DOIUrl":"https://doi.org/10.1109/WPT.2013.6556867","url":null,"abstract":"This paper presents an overview of a system for wireless far-field powering of unattended distributed wireless sensors, including the power reception device design and optimization, power transmission, power management and control. Design and measured data of implementations of the various parts of the system in the 2GHz cellular and 2.45GHz unlicensed bands will be shown. A design methodology for antennas integrated with rectifiers (rectennas) optimized for efficiency at low incident power levels (5-100uW/cm2) will be presented. Integration of rectenna elements and arrays with the electronic application (wireless sensing in this case) requires power management, and some approaches that consume very low power levels will be presented. Possible applications such as sensors for comfort, performance and security of commercial and residential buildings will be discussed.","PeriodicalId":143468,"journal":{"name":"2013 IEEE Wireless Power Transfer (WPT)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122429984","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 : 2013-05-15DOI: 10.1109/WPT.2013.6556927
Q. Yuan, Takanori Ishikawa
A novel wireless power system called Via-Wheel Power Transfer (V-WPT) [1] [2] is expected to have significant advantages of long cruising, no charging time, and lightweight for Electric vehicles (EVs). However, to apply V-WPT systems to EVs, there are lots of problems should to be solved, such as the problem how to get maximum efficiency by adjusting the matching circuit for the load, the safety problem if a human is sitting in car and so on. In this paper, we will focus the safety problem. The electromagnetic field distribution of V-WPT system and the Specific Absorption Ratio (SAR) of human body who is near to V-WPT system will be analyzed by using an electromagnetic simulation soft. The average SAR in 10g of tissue will be presented and compared with the safety guidelines to discuss if the V-WPT system is safe for human body or not for different loads of receiving element.
{"title":"Effect of via-wheel power transfer system on human body","authors":"Q. Yuan, Takanori Ishikawa","doi":"10.1109/WPT.2013.6556927","DOIUrl":"https://doi.org/10.1109/WPT.2013.6556927","url":null,"abstract":"A novel wireless power system called Via-Wheel Power Transfer (V-WPT) [1] [2] is expected to have significant advantages of long cruising, no charging time, and lightweight for Electric vehicles (EVs). However, to apply V-WPT systems to EVs, there are lots of problems should to be solved, such as the problem how to get maximum efficiency by adjusting the matching circuit for the load, the safety problem if a human is sitting in car and so on. In this paper, we will focus the safety problem. The electromagnetic field distribution of V-WPT system and the Specific Absorption Ratio (SAR) of human body who is near to V-WPT system will be analyzed by using an electromagnetic simulation soft. The average SAR in 10g of tissue will be presented and compared with the safety guidelines to discuss if the V-WPT system is safe for human body or not for different loads of receiving element.","PeriodicalId":143468,"journal":{"name":"2013 IEEE Wireless Power Transfer (WPT)","volume":"06 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131404239","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 : 2013-05-15DOI: 10.1109/WPT.2013.6556909
S. Konno, T. Yamamoto, K. Koshiji
In recent times, the wireless power transfer (WPT) technology is attracting attention because of the expanding use of portable devices. In particular, extensive studies on the WPT technology using magnetic resonance are being conducted because this technology offers various advantages such as the achievement of a transmission efficiency of 90% or more from a distance of 1 m, as compared with traditional electromagnetic induction systems. However, studies on thin coils, as well as those on the improvement of the coupling coefficient, have hitherto been inadequate. Consequently, we have formed a spiral pattern on a printed circuit board and devised spiral patterns to improve the coupling coefficient, which was calculated by carrying out an electromagnetic field analysis. As a result, we found that the coupling coefficient improved by adjusting the inner radius and pitch of the spiral coil and by designing the geometry of the spiral coil.
{"title":"Improvement of coupling coefficient by designing a spiral pattern formed on a printed circuit board","authors":"S. Konno, T. Yamamoto, K. Koshiji","doi":"10.1109/WPT.2013.6556909","DOIUrl":"https://doi.org/10.1109/WPT.2013.6556909","url":null,"abstract":"In recent times, the wireless power transfer (WPT) technology is attracting attention because of the expanding use of portable devices. In particular, extensive studies on the WPT technology using magnetic resonance are being conducted because this technology offers various advantages such as the achievement of a transmission efficiency of 90% or more from a distance of 1 m, as compared with traditional electromagnetic induction systems. However, studies on thin coils, as well as those on the improvement of the coupling coefficient, have hitherto been inadequate. Consequently, we have formed a spiral pattern on a printed circuit board and devised spiral patterns to improve the coupling coefficient, which was calculated by carrying out an electromagnetic field analysis. As a result, we found that the coupling coefficient improved by adjusting the inner radius and pitch of the spiral coil and by designing the geometry of the spiral coil.","PeriodicalId":143468,"journal":{"name":"2013 IEEE Wireless Power Transfer (WPT)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130634829","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：