Pub Date : 2022-10-14DOI: 10.1109/IET-ICETA56553.2022.9971679
Chia-Yu Wu, Yu-Chi Chen, Ray-Chun Lu
Sports have long shed their conventional look and become more commercialized with coverage by the media and business activities. The continuous development of the media has drawn it closer to sports, and television broadcasting is an important facilitator in making sports events widely popular among people.The sports of table tennis require the use of a small court and a small ball played in a fast speed with strong rotation and variable landing points. These characteristics also lead to some limitations, which may greatly reduce audiences’ sense of immersion, experience and participation in events; and the screen design of television broadcast becomes very important. Therefore, this study takes the 2022 National Intercollegiate Athletic Games as a case study to analyze its broadcast screen design, hoping to provide suggestions on the screen design for similar sports events broadcasted in the future.
{"title":"The Study of Sports Events Broadcasting Design –The 2022 National Intercollegiate Athletic Games as an Example","authors":"Chia-Yu Wu, Yu-Chi Chen, Ray-Chun Lu","doi":"10.1109/IET-ICETA56553.2022.9971679","DOIUrl":"https://doi.org/10.1109/IET-ICETA56553.2022.9971679","url":null,"abstract":"Sports have long shed their conventional look and become more commercialized with coverage by the media and business activities. The continuous development of the media has drawn it closer to sports, and television broadcasting is an important facilitator in making sports events widely popular among people.The sports of table tennis require the use of a small court and a small ball played in a fast speed with strong rotation and variable landing points. These characteristics also lead to some limitations, which may greatly reduce audiences’ sense of immersion, experience and participation in events; and the screen design of television broadcast becomes very important. Therefore, this study takes the 2022 National Intercollegiate Athletic Games as a case study to analyze its broadcast screen design, hoping to provide suggestions on the screen design for similar sports events broadcasted in the future.","PeriodicalId":46240,"journal":{"name":"IET Networks","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80546331","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}
Stability performance of a grid-connected largescale DC microgrid (DCMG) with a hybrid wind farm (WF) and solar farm (SF) is evaluated in this paper. The studied DCMG comprises an equivalent aggregated (EA) SF and an EA WF based on permanent-magnet synchronous generator (PMSG). The AC output of the EA WF is transformed to a DC quantity through an EA voltage-source converter (VSC), which is integrated with the DC output of the EA DC-DC converter of the EA SF. The DC quantity of the DCMG is transformed to an AC quantity to send to an AC power grid through an EA voltage-source inverter (VSI), a step-up power transformer, and transmission lines. Small-signal stability of the studied DCMG under various chosen operating points is achieved using eigenvalue analysis. Dynamic simulations and transient responses of the studied DCMG under various disturbances are also completed and evaluated.
本文对风力发电场和太阳能发电场混合并网的大型直流微电网(DCMG)的稳定性能进行了评价。所研究的DCMG由等效聚合(EA) SF和基于永磁同步发电机(PMSG)的EA WF组成。EA WF的交流输出通过EA电压源变换器(VSC)转换为直流量，该电压源变换器与EA SF的EA DC-DC变换器的直流输出集成。DCMG的直流量经EA VSI (voltage-source inverter)、升压电源变压器和输电线路转换成交流量，送入交流电网。利用特征值分析方法实现了所研究的DCMG在不同工作点下的小信号稳定性。完成了所研究的DCMG在各种扰动下的动态仿真和瞬态响应，并对其进行了评价。
{"title":"Stability Analysis of a Grid-connected Large-scale DC Microgrid with a Hybrid Wind/Solar Farm","authors":"Li Wang, Xianghua Peng, Hao-Sin Yang, Ching-Wen Tzeng, Jia-Ruei Zhang, Ching-Chuan Tseng","doi":"10.1109/IET-ICETA56553.2022.9971657","DOIUrl":"https://doi.org/10.1109/IET-ICETA56553.2022.9971657","url":null,"abstract":"Stability performance of a grid-connected largescale DC microgrid (DCMG) with a hybrid wind farm (WF) and solar farm (SF) is evaluated in this paper. The studied DCMG comprises an equivalent aggregated (EA) SF and an EA WF based on permanent-magnet synchronous generator (PMSG). The AC output of the EA WF is transformed to a DC quantity through an EA voltage-source converter (VSC), which is integrated with the DC output of the EA DC-DC converter of the EA SF. The DC quantity of the DCMG is transformed to an AC quantity to send to an AC power grid through an EA voltage-source inverter (VSI), a step-up power transformer, and transmission lines. Small-signal stability of the studied DCMG under various chosen operating points is achieved using eigenvalue analysis. Dynamic simulations and transient responses of the studied DCMG under various disturbances are also completed and evaluated.","PeriodicalId":46240,"journal":{"name":"IET Networks","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77756303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-14DOI: 10.1109/IET-ICETA56553.2022.9971588
Chun-Liang Yang, Yi-Chen Lin, Ming-Che Chiang
This paper proposes a scheme with sensor fusion that enhances a traditional multi-vital signs system’s performance by predicting the user’s physiological state. Detecting the user’s carbon dioxide, temperature, and humidity produced by breathing can effectively estimate whether the user has enough resting-state time before conducting measurements. Additionally, when users are not using the system, it can monitor ambient parameters, such as carbon dioxide, temperature, and humidity. More importantly, it can collect the user’s physiological state to achieve the higher performance of an intelligent multi-vital signs system.
{"title":"Multi-Vital Signs System with Sensor Fusion","authors":"Chun-Liang Yang, Yi-Chen Lin, Ming-Che Chiang","doi":"10.1109/IET-ICETA56553.2022.9971588","DOIUrl":"https://doi.org/10.1109/IET-ICETA56553.2022.9971588","url":null,"abstract":"This paper proposes a scheme with sensor fusion that enhances a traditional multi-vital signs system’s performance by predicting the user’s physiological state. Detecting the user’s carbon dioxide, temperature, and humidity produced by breathing can effectively estimate whether the user has enough resting-state time before conducting measurements. Additionally, when users are not using the system, it can monitor ambient parameters, such as carbon dioxide, temperature, and humidity. More importantly, it can collect the user’s physiological state to achieve the higher performance of an intelligent multi-vital signs system.","PeriodicalId":46240,"journal":{"name":"IET Networks","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76347597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-14DOI: 10.1109/IET-ICETA56553.2022.9971577
Chien-Lung Wang, Jou-An Shih, I. Liao, Chun-Tsai Chien
Since smart meters are IoT devices that can share energy usage information to users and third-party service providers, any vulnerability of smart meters that can be exploited by hackers is a threat to the reliability of smart grids. The purpose of this paper is to explore the possibilities of DoS attacks to smart meters. Our research focuses on the High-Level Data Link Control layer of DLMS/cosEM smart meters. The testing cases are generated by fuzzing testing methods according to the HDLC specifications. The CTT 3.1 is used as the client sending requests to the smart meter server. The responses of the server are then recorded and analyzed for potential vulnerabilities. The results show that the fuzzing test cases on the buffer overflow/underflow category generate most of the abnormal responses.
{"title":"An Evaluation of Cybersecurity Risks of DLMS/COSEM Smart Meter Using Fuzzing Testing","authors":"Chien-Lung Wang, Jou-An Shih, I. Liao, Chun-Tsai Chien","doi":"10.1109/IET-ICETA56553.2022.9971577","DOIUrl":"https://doi.org/10.1109/IET-ICETA56553.2022.9971577","url":null,"abstract":"Since smart meters are IoT devices that can share energy usage information to users and third-party service providers, any vulnerability of smart meters that can be exploited by hackers is a threat to the reliability of smart grids. The purpose of this paper is to explore the possibilities of DoS attacks to smart meters. Our research focuses on the High-Level Data Link Control layer of DLMS/cosEM smart meters. The testing cases are generated by fuzzing testing methods according to the HDLC specifications. The CTT 3.1 is used as the client sending requests to the smart meter server. The responses of the server are then recorded and analyzed for potential vulnerabilities. The results show that the fuzzing test cases on the buffer overflow/underflow category generate most of the abnormal responses.","PeriodicalId":46240,"journal":{"name":"IET Networks","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72673750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-14DOI: 10.1109/IET-ICETA56553.2022.9971509
Tai-Ho Yu, Chiao-Yi Huang, Tang-Wei Guan
This study is based on the actual drive mode of a prototype of a circular cylindrical wedge-wave ultrasonic motor (WW-USM). The contact friction model of the stator and rotor was established by the finite element software 3D ANSYS, and transient contact mechanics between the stator and the rotor were simulated. Given the actual conditions of the displacement and external force boundary conditions, the appropriate contact parameters, test the ideal convergence of the solution, obtain reasonable results, and estimate the motor performance curve of revolution speed and torque. In the ultrasonic motor prototyping of measurement characteristics, the use of piezoelectric induction, the size of the control voltage applied to the rotor pre-stressing to replace the traditional compression spring caused by uneven force of the rotor phenomenon, to avoid affecting the motor performance. The simulation results from 3D ANSYS indicate that the contact friction model between the stator and the rotor is crucial for the determination of the real constant.
{"title":"Numerical Transient Analysis of a Wedge-Wave Ultrasonic Motor","authors":"Tai-Ho Yu, Chiao-Yi Huang, Tang-Wei Guan","doi":"10.1109/IET-ICETA56553.2022.9971509","DOIUrl":"https://doi.org/10.1109/IET-ICETA56553.2022.9971509","url":null,"abstract":"This study is based on the actual drive mode of a prototype of a circular cylindrical wedge-wave ultrasonic motor (WW-USM). The contact friction model of the stator and rotor was established by the finite element software 3D ANSYS, and transient contact mechanics between the stator and the rotor were simulated. Given the actual conditions of the displacement and external force boundary conditions, the appropriate contact parameters, test the ideal convergence of the solution, obtain reasonable results, and estimate the motor performance curve of revolution speed and torque. In the ultrasonic motor prototyping of measurement characteristics, the use of piezoelectric induction, the size of the control voltage applied to the rotor pre-stressing to replace the traditional compression spring caused by uneven force of the rotor phenomenon, to avoid affecting the motor performance. The simulation results from 3D ANSYS indicate that the contact friction model between the stator and the rotor is crucial for the determination of the real constant.","PeriodicalId":46240,"journal":{"name":"IET Networks","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88935023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-14DOI: 10.1109/IET-ICETA56553.2022.9971678
Chenjie Deng, T. Ko
Rough surface with micro-nano pits can form large numbers of hot spots after noble metal deposition, which would be beneficial to improve surface enhanced Raman scattering (SERS) signal. In this study, we proposed a SERS substrate that GaN was etched by KOH and then covered by Au layer. Scanning electronic microscopy confirmed the thicknesses of Au layers and revealed many typical hexagonal micro-nano pits distributing on the surface. SERS results indicate the pitted GaN covered by the Au layer of 25 nm has best SERS intensity in our case, providing a good enhancement factor of 6. 57$times 10^{7}$ and a limit of detection of approximately 1$0^{-9}$M for rhodamine 6G(R6G) used as a test molecule because of the electromagnetic mechanism at the interface between Au layers and R6G. A series of experiments demonstrate $mathrm{A}mathrm{u}/$pitted $mathrm{G}mathrm{a}mathrm{N}$ with high sensitivity is potential for biomedical application.
{"title":"Study on surface-enhanced Raman scattering performance of pitted GaN covered by Au layer","authors":"Chenjie Deng, T. Ko","doi":"10.1109/IET-ICETA56553.2022.9971678","DOIUrl":"https://doi.org/10.1109/IET-ICETA56553.2022.9971678","url":null,"abstract":"Rough surface with micro-nano pits can form large numbers of hot spots after noble metal deposition, which would be beneficial to improve surface enhanced Raman scattering (SERS) signal. In this study, we proposed a SERS substrate that GaN was etched by KOH and then covered by Au layer. Scanning electronic microscopy confirmed the thicknesses of Au layers and revealed many typical hexagonal micro-nano pits distributing on the surface. SERS results indicate the pitted GaN covered by the Au layer of 25 nm has best SERS intensity in our case, providing a good enhancement factor of 6. 57$times 10^{7}$ and a limit of detection of approximately 1$0^{-9}$M for rhodamine 6G(R6G) used as a test molecule because of the electromagnetic mechanism at the interface between Au layers and R6G. A series of experiments demonstrate $mathrm{A}mathrm{u}/$pitted $mathrm{G}mathrm{a}mathrm{N}$ with high sensitivity is potential for biomedical application.","PeriodicalId":46240,"journal":{"name":"IET Networks","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90914844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-14DOI: 10.1109/IET-ICETA56553.2022.9971578
Jen Lii, Haiqun Yang, Jau-Jr Lin
This paper discusses the design of wireless induction charging and radar to identify power receiving place, image identification, and adjustment position for vehicles. The research idea came from EVs as well as the increasingly mature wireless charging technology in recent years. This paper analyzes the possibility of using the radar system combined with image recognition to solve the problems when vehicles are currently charged at fixed positions. Vehicles sometimes cannot be accurately aligned with the power transmission board, resulting in poor efficiency, or there is insufficient power transmission board due to locations. This paper provides solutions to improve charging efficiency, using radar as a sensor in design to find the position of the vehicle and position it below the power receiving place. The image recognition module PIXY 2 is also employed to capture the image color to adjust a more accurate position, so that the charging efficiency and speed can be improved and that time and space limitation can be avoided.
{"title":"Movable Wireless Charging System for Multiple Electric Vehicles","authors":"Jen Lii, Haiqun Yang, Jau-Jr Lin","doi":"10.1109/IET-ICETA56553.2022.9971578","DOIUrl":"https://doi.org/10.1109/IET-ICETA56553.2022.9971578","url":null,"abstract":"This paper discusses the design of wireless induction charging and radar to identify power receiving place, image identification, and adjustment position for vehicles. The research idea came from EVs as well as the increasingly mature wireless charging technology in recent years. This paper analyzes the possibility of using the radar system combined with image recognition to solve the problems when vehicles are currently charged at fixed positions. Vehicles sometimes cannot be accurately aligned with the power transmission board, resulting in poor efficiency, or there is insufficient power transmission board due to locations. This paper provides solutions to improve charging efficiency, using radar as a sensor in design to find the position of the vehicle and position it below the power receiving place. The image recognition module PIXY 2 is also employed to capture the image color to adjust a more accurate position, so that the charging efficiency and speed can be improved and that time and space limitation can be avoided.","PeriodicalId":46240,"journal":{"name":"IET Networks","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87508291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-14DOI: 10.1109/IET-ICETA56553.2022.9971696
Po Su, Chiu-Chin Lin, Chung-Hsien Chen, Jen-Chun Lee
Recently, the number of people diagnosed with lung cancer in Taiwan has gradually increased. In particular, the proportion of lung adenocarcinoma is the highest among lung cancers. Although there are many ways to find the location of the tumor, the only way to determine whether the tumor is benign or malignant can only be determined by pathological examination. Only then can we know that to avoid insufficient medical energy, this study uses image segmentation to help medical laboratory technicians quickly determine the location of tumors, which can not only stabilize medical energy, but also use artificial intelligence to assist medical laboratory students to use computers to study.
{"title":"Automatic Lung Cancer Segmantation based on Deep Learning","authors":"Po Su, Chiu-Chin Lin, Chung-Hsien Chen, Jen-Chun Lee","doi":"10.1109/IET-ICETA56553.2022.9971696","DOIUrl":"https://doi.org/10.1109/IET-ICETA56553.2022.9971696","url":null,"abstract":"Recently, the number of people diagnosed with lung cancer in Taiwan has gradually increased. In particular, the proportion of lung adenocarcinoma is the highest among lung cancers. Although there are many ways to find the location of the tumor, the only way to determine whether the tumor is benign or malignant can only be determined by pathological examination. Only then can we know that to avoid insufficient medical energy, this study uses image segmentation to help medical laboratory technicians quickly determine the location of tumors, which can not only stabilize medical energy, but also use artificial intelligence to assist medical laboratory students to use computers to study.","PeriodicalId":46240,"journal":{"name":"IET Networks","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84107209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-14DOI: 10.1109/IET-ICETA56553.2022.9971539
S. Young, Yu-Jhih Chu
In this research, Zinc Oxide nanorod (ZnO NRs) ultraviolet photodetectors (UV PDs) were synthesized through hydrothermal method and fabricated on glass substrate. The material analysis revealed the surface morpholofy and optical properties of the ZnO nanorod. Results from I-V characteristics displayed that ZnO nanorod UV PDs have great sensitivity and stability. This research approve that ZnO NRs could be a good option for develop UV PDs.
{"title":"Ultraviolet photodetector based on ZnO nanorod by hydrothermal method","authors":"S. Young, Yu-Jhih Chu","doi":"10.1109/IET-ICETA56553.2022.9971539","DOIUrl":"https://doi.org/10.1109/IET-ICETA56553.2022.9971539","url":null,"abstract":"In this research, Zinc Oxide nanorod (ZnO NRs) ultraviolet photodetectors (UV PDs) were synthesized through hydrothermal method and fabricated on glass substrate. The material analysis revealed the surface morpholofy and optical properties of the ZnO nanorod. Results from I-V characteristics displayed that ZnO nanorod UV PDs have great sensitivity and stability. This research approve that ZnO NRs could be a good option for develop UV PDs.","PeriodicalId":46240,"journal":{"name":"IET Networks","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75852325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-14DOI: 10.1109/IET-ICETA56553.2022.9971700
Chao-Hsien Lee, Yunqing Li
Not only live video but also on-demand video have become essential parts of our daily life. In order to improve video transmission quality, Content Delivery Network (CDN) is utilized to accelerate video delivery from web servers to web clients, i.e., browsers. Regarding inside a CDN, this paper studied and proposed to use Tsunami UDP transmission protocol instead of HTTP and integrate RaptorQ to overcome unstable network conditions. Based on our initial experimental results, this paper can improve twice times of throughput between edge servers.
{"title":"Preliminary Study of Cache Exchange Improvement based on RaptorQ and Tsunami","authors":"Chao-Hsien Lee, Yunqing Li","doi":"10.1109/IET-ICETA56553.2022.9971700","DOIUrl":"https://doi.org/10.1109/IET-ICETA56553.2022.9971700","url":null,"abstract":"Not only live video but also on-demand video have become essential parts of our daily life. In order to improve video transmission quality, Content Delivery Network (CDN) is utilized to accelerate video delivery from web servers to web clients, i.e., browsers. Regarding inside a CDN, this paper studied and proposed to use Tsunami UDP transmission protocol instead of HTTP and integrate RaptorQ to overcome unstable network conditions. Based on our initial experimental results, this paper can improve twice times of throughput between edge servers.","PeriodicalId":46240,"journal":{"name":"IET Networks","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84145725","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：