Pub Date : 2017-10-01DOI: 10.1109/ICCCHINAW.2017.8355281
Haotong Cao, Longxiang Yang, Hongbo Zhu
Virtual Network Embedding (VNE) is one of the longstanding challenges in Network Virtualization: how to efficiently embed multiple virtual networks (VNs), with node-link resource requirements, onto the shared substrate network, having finite underlying resources. Proposed algorithms are heuristic in the literature. Most heuristic VNE algorithms, only considering single network topology attribute and local node resources to rank nodes, will lead to low resource utilization of substrate network and low average VN acceptance ratio in the long term. To deal with this issue, this paper proposes another efficient heuristic algorithm VNE-TAGNR, adopting a novel node-ranking approach in the node mapping stage and coordinating the following link mapping stage. In the node-ranking approach, three fundamental Topology Attributes and Global Network Resources (TAGNR) are considered and quantified. Numerical simulation results vividly reveal that the proposed VNE-TAGNR algorithm outperforms four typical and state-of-the-art heuristic algorithms, in terms of average VN acceptance ratio, average node / link utilization and average revenue / cost.
{"title":"An efficient embedding algorithm for virtual network via exploiting topology attributes and global network resources","authors":"Haotong Cao, Longxiang Yang, Hongbo Zhu","doi":"10.1109/ICCCHINAW.2017.8355281","DOIUrl":"https://doi.org/10.1109/ICCCHINAW.2017.8355281","url":null,"abstract":"Virtual Network Embedding (VNE) is one of the longstanding challenges in Network Virtualization: how to efficiently embed multiple virtual networks (VNs), with node-link resource requirements, onto the shared substrate network, having finite underlying resources. Proposed algorithms are heuristic in the literature. Most heuristic VNE algorithms, only considering single network topology attribute and local node resources to rank nodes, will lead to low resource utilization of substrate network and low average VN acceptance ratio in the long term. To deal with this issue, this paper proposes another efficient heuristic algorithm VNE-TAGNR, adopting a novel node-ranking approach in the node mapping stage and coordinating the following link mapping stage. In the node-ranking approach, three fundamental Topology Attributes and Global Network Resources (TAGNR) are considered and quantified. Numerical simulation results vividly reveal that the proposed VNE-TAGNR algorithm outperforms four typical and state-of-the-art heuristic algorithms, in terms of average VN acceptance ratio, average node / link utilization and average revenue / cost.","PeriodicalId":164833,"journal":{"name":"2017 IEEE/CIC International Conference on Communications in China (ICCC Workshops)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122201376","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 : 2017-10-01DOI: 10.1109/ICCCHINAW.2017.8355266
H. Ou, Weifang Lu
Light-emitting silicon carbide is emerging as an environment-friendly wavelength converter in the application of light-emitting diode based white light source for two main reasons. Firstly, SiC has very good thermal conductivity and therefore a good substrate for GaN growth in addition to the small lattice mismatch. Secondly, SiC material is abundant, containing no rear-earth element material as commercial phosphors. In this paper, fabrication of porous SiC is introduced, and their morphology and photoluminescence are characterized. Additionally, the carrier lifetime of the porous SiC is measured by time-resolved photoluminescence. The ultrashort decay time in the order of ∼70 ps indicates porous SiC is very promising for the application in the ultrafast visible light communications.
{"title":"Visible light emission from porous silicon carbide","authors":"H. Ou, Weifang Lu","doi":"10.1109/ICCCHINAW.2017.8355266","DOIUrl":"https://doi.org/10.1109/ICCCHINAW.2017.8355266","url":null,"abstract":"Light-emitting silicon carbide is emerging as an environment-friendly wavelength converter in the application of light-emitting diode based white light source for two main reasons. Firstly, SiC has very good thermal conductivity and therefore a good substrate for GaN growth in addition to the small lattice mismatch. Secondly, SiC material is abundant, containing no rear-earth element material as commercial phosphors. In this paper, fabrication of porous SiC is introduced, and their morphology and photoluminescence are characterized. Additionally, the carrier lifetime of the porous SiC is measured by time-resolved photoluminescence. The ultrashort decay time in the order of ∼70 ps indicates porous SiC is very promising for the application in the ultrafast visible light communications.","PeriodicalId":164833,"journal":{"name":"2017 IEEE/CIC International Conference on Communications in China (ICCC Workshops)","volume":"38 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113989382","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 : 2017-10-01DOI: 10.1109/ICCCHINAW.2017.8355263
M. Shu, Nuo Wei, Jiyong Xu, Ming Yang
ECG (electrocardiogram) is of great value in the diagnosis of acute myocardial infarction, myocardial ischemia, ventricular hypertrophy and conduction disorders. In this paper, we propose a new algorithm based on Android platform and cloud computing platform for ECG analysis, rendering, transmission and sharing, which achieves the interaction between doctors and users by visiting cloud platform interface.
{"title":"An intelligent ECG interactive processing system based on Android and cloud computing platform","authors":"M. Shu, Nuo Wei, Jiyong Xu, Ming Yang","doi":"10.1109/ICCCHINAW.2017.8355263","DOIUrl":"https://doi.org/10.1109/ICCCHINAW.2017.8355263","url":null,"abstract":"ECG (electrocardiogram) is of great value in the diagnosis of acute myocardial infarction, myocardial ischemia, ventricular hypertrophy and conduction disorders. In this paper, we propose a new algorithm based on Android platform and cloud computing platform for ECG analysis, rendering, transmission and sharing, which achieves the interaction between doctors and users by visiting cloud platform interface.","PeriodicalId":164833,"journal":{"name":"2017 IEEE/CIC International Conference on Communications in China (ICCC Workshops)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131010938","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}
Among all the wireless communication technologies, visible light communication (VLC) technology that can provide effective illumination and communication simultaneously is one of the preferred options for further development. In addition, different coding schemes of FEC are applied to VLC in order to improve the coding gain. Polar codes is one of the attractive FEC coding schemes with low decoding complexity due to its novel recursive decoding algorithms. In this paper, the performance of polar codes used in VLC has been verified by off-line experiments for the first time. Firstly, we verify the LOS channel of the proposed VLC system conforms to optical wireless LOS channel model. Then we validate that polar codes can significantly increase the effective communication distance in this system. The experimental results show that the polar codes have better BER performance than LDPC, and the error control performance can be obviously improved by polar codes with lower code rates.
{"title":"Polar coding performance for indoor LOS VLC system","authors":"Jianming Zhang, Wenxiu Hu, Xicong Li, Min Zhang, Dahai Han, Zabih Ghassemlooy","doi":"10.1109/ICCCHINAW.2017.8355268","DOIUrl":"https://doi.org/10.1109/ICCCHINAW.2017.8355268","url":null,"abstract":"Among all the wireless communication technologies, visible light communication (VLC) technology that can provide effective illumination and communication simultaneously is one of the preferred options for further development. In addition, different coding schemes of FEC are applied to VLC in order to improve the coding gain. Polar codes is one of the attractive FEC coding schemes with low decoding complexity due to its novel recursive decoding algorithms. In this paper, the performance of polar codes used in VLC has been verified by off-line experiments for the first time. Firstly, we verify the LOS channel of the proposed VLC system conforms to optical wireless LOS channel model. Then we validate that polar codes can significantly increase the effective communication distance in this system. The experimental results show that the polar codes have better BER performance than LDPC, and the error control performance can be obviously improved by polar codes with lower code rates.","PeriodicalId":164833,"journal":{"name":"2017 IEEE/CIC International Conference on Communications in China (ICCC Workshops)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125659109","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 : 2017-10-01DOI: 10.1109/ICCCHINAW.2017.8355284
Yinghong Ma, Hongyan Li, Y. Jiao
Multi-hop cooperative relay is a technology widely adopted to solve the performance anomaly problem, extend the wireless coverage, improve the performance of resource-depleted devices, etc., in Wireless Local Area Network (WLAN). However, most of the existing works use single-channel cooperative relay, i.e., assigning the same channel for the multi-hop links of each relay path. In this paper, a multi-channel assisted cooperative relay method (MCCR) is proposed to get further gain of throughput. This method considers two-hop association to the AP for the wireless clients with poor single-hop links to solve the performance anomaly problem and assigning different channels for the two-hop links to increase the number of concurrent transmissions. The mathematical analysis and simulation results demonstrate the performance benefits of MCCR.
多跳协同中继是无线局域网(wireless Local Area Network, WLAN)中为解决性能异常问题、扩大无线覆盖范围、提高资源枯竭设备性能等而广泛采用的一种技术。但是，现有的工作大多采用单通道协同中继，即为每条中继路径的多跳链路分配相同的信道。为了进一步提高吞吐量，本文提出了一种多通道辅助协同中继方法(MCCR)。该方法考虑单跳链路较差的无线客户端与AP进行两跳关联以解决性能异常问题，并为两跳链路分配不同的信道以增加并发传输数。数学分析和仿真结果表明了mcr的性能优势。
{"title":"Multi-channel assisted cooperative relay for high efficiency wireless local area network","authors":"Yinghong Ma, Hongyan Li, Y. Jiao","doi":"10.1109/ICCCHINAW.2017.8355284","DOIUrl":"https://doi.org/10.1109/ICCCHINAW.2017.8355284","url":null,"abstract":"Multi-hop cooperative relay is a technology widely adopted to solve the performance anomaly problem, extend the wireless coverage, improve the performance of resource-depleted devices, etc., in Wireless Local Area Network (WLAN). However, most of the existing works use single-channel cooperative relay, i.e., assigning the same channel for the multi-hop links of each relay path. In this paper, a multi-channel assisted cooperative relay method (MCCR) is proposed to get further gain of throughput. This method considers two-hop association to the AP for the wireless clients with poor single-hop links to solve the performance anomaly problem and assigning different channels for the two-hop links to increase the number of concurrent transmissions. The mathematical analysis and simulation results demonstrate the performance benefits of MCCR.","PeriodicalId":164833,"journal":{"name":"2017 IEEE/CIC International Conference on Communications in China (ICCC Workshops)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125294833","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 : 2017-10-01DOI: 10.1109/ICCCHINAW.2017.8355264
S. Teli, Yeon-ho Chung
One of the major challenges in optical camera communication (OCC) is low data transmission rate, due to low sampling rate of a camera based receiver, compared with very high-speed modulation of light emitting diodes (LEDs). This paper presents a high-speed OCC using a novel capturing strategy called selective capture (SC). The proposed SC scheme provides a high data rate of up to 10.272 kbps in OCC, when evaluated with a Raspberry Pi camera module (RaspiCam) as the receiver. Experiments were conducted with a 4×4 red, green and blue (RGB) LED array employed as the transmitter and time synchronized based on a keyframe. The RaspiCam was tweaked with the SC values in terms of pixels using the Linux commanding tool. This tweaked RaspiCam facilitates the selection of the resolution and the SC area to selectively capture from the full camera capture frame. Experiment results demonstrate that a capture speed of 435 frames per second (fps) can be achieved, yielding a high-speed indoor OCC with a bit error rate (BER) of 10−5 at a transmission distance of 125 cm.
{"title":"High-speed optical camera communication using selective capture","authors":"S. Teli, Yeon-ho Chung","doi":"10.1109/ICCCHINAW.2017.8355264","DOIUrl":"https://doi.org/10.1109/ICCCHINAW.2017.8355264","url":null,"abstract":"One of the major challenges in optical camera communication (OCC) is low data transmission rate, due to low sampling rate of a camera based receiver, compared with very high-speed modulation of light emitting diodes (LEDs). This paper presents a high-speed OCC using a novel capturing strategy called selective capture (SC). The proposed SC scheme provides a high data rate of up to 10.272 kbps in OCC, when evaluated with a Raspberry Pi camera module (RaspiCam) as the receiver. Experiments were conducted with a 4×4 red, green and blue (RGB) LED array employed as the transmitter and time synchronized based on a keyframe. The RaspiCam was tweaked with the SC values in terms of pixels using the Linux commanding tool. This tweaked RaspiCam facilitates the selection of the resolution and the SC area to selectively capture from the full camera capture frame. Experiment results demonstrate that a capture speed of 435 frames per second (fps) can be achieved, yielding a high-speed indoor OCC with a bit error rate (BER) of 10−5 at a transmission distance of 125 cm.","PeriodicalId":164833,"journal":{"name":"2017 IEEE/CIC International Conference on Communications in China (ICCC Workshops)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117085874","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 : 2017-10-01DOI: 10.1109/ICCCHINAW.2017.8355271
Patricia Chavez-Burbano, V. Guerra, J. Rabadán, R. Pérez-Jiménez
Nowadays, the study of viable applications for smart cities has the direct interest of the research community. The generalized use of LED-based devices with larger dimensions and affordable costs, and the insertion of cameras with better characteristics in devices such as tablets and smart-phones, impulse the use of Optical Camera Communication (OCC) as a practical solution for future Internet of Things (IoT) and smart cities implementations. A real long distance OCC system for relatively slow data rate applications in smart cities is described along with its advantages and possible difficulties. A real scenario experiment has been held showing the viability of the proposed system.
{"title":"Optical camera communication for smart cities","authors":"Patricia Chavez-Burbano, V. Guerra, J. Rabadán, R. Pérez-Jiménez","doi":"10.1109/ICCCHINAW.2017.8355271","DOIUrl":"https://doi.org/10.1109/ICCCHINAW.2017.8355271","url":null,"abstract":"Nowadays, the study of viable applications for smart cities has the direct interest of the research community. The generalized use of LED-based devices with larger dimensions and affordable costs, and the insertion of cameras with better characteristics in devices such as tablets and smart-phones, impulse the use of Optical Camera Communication (OCC) as a practical solution for future Internet of Things (IoT) and smart cities implementations. A real long distance OCC system for relatively slow data rate applications in smart cities is described along with its advantages and possible difficulties. A real scenario experiment has been held showing the viability of the proposed system.","PeriodicalId":164833,"journal":{"name":"2017 IEEE/CIC International Conference on Communications in China (ICCC Workshops)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126076071","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 : 2017-10-01DOI: 10.1109/ICCCHINAW.2017.8355282
Xiaoqing Song, Youcai Wei, Zixu Zhao, Muyu Wang
This paper discusses the effect of driving current on frequency response of the two types of light emitting diodes (LEDs), namely, phosphor-based LED and single color LED. The experiments show that the influence of the change of driving current on frequency response of phosphor-based LED is not obvious compared with the single color LED(blue, red and green). The experiments also find that the bandwidth of the white LED was expanded from 1MHz to 32MHz by the pre-equalization strategy and 26Mbit/s transmission speed was taken under Bit Error Ratio of 7.55×10-6 within 3m by non-return-to-zero on-off-keying modulation. Especially, the frequency response intensity of the phosphor-based LED is little influenced by the fluctuation of the driving current, which meets the requirements that the indoor light source needs to be adjusted in real-time by driving current. As the bandwidth of the single color LED is changed by the driving current obviously, the LED modulation bandwidth should be calculated according to the minimum driving current while we consider the requirement of the VLC transmission speed.
{"title":"The influence of driving current on the LED modulation bandwidth indoor VLC","authors":"Xiaoqing Song, Youcai Wei, Zixu Zhao, Muyu Wang","doi":"10.1109/ICCCHINAW.2017.8355282","DOIUrl":"https://doi.org/10.1109/ICCCHINAW.2017.8355282","url":null,"abstract":"This paper discusses the effect of driving current on frequency response of the two types of light emitting diodes (LEDs), namely, phosphor-based LED and single color LED. The experiments show that the influence of the change of driving current on frequency response of phosphor-based LED is not obvious compared with the single color LED(blue, red and green). The experiments also find that the bandwidth of the white LED was expanded from 1MHz to 32MHz by the pre-equalization strategy and 26Mbit/s transmission speed was taken under Bit Error Ratio of 7.55×10-6 within 3m by non-return-to-zero on-off-keying modulation. Especially, the frequency response intensity of the phosphor-based LED is little influenced by the fluctuation of the driving current, which meets the requirements that the indoor light source needs to be adjusted in real-time by driving current. As the bandwidth of the single color LED is changed by the driving current obviously, the LED modulation bandwidth should be calculated according to the minimum driving current while we consider the requirement of the VLC transmission speed.","PeriodicalId":164833,"journal":{"name":"2017 IEEE/CIC International Conference on Communications in China (ICCC Workshops)","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123350254","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 : 2017-10-01DOI: 10.1109/ICCCHINAW.2017.8355269
Chuying Yu, Meiwei Kong, Bin Sun, Jing Xu
This paper aims in providing a brief glimpse at recent works on underwater wireless optical communication (UWOC) that are carried out in the Optical Communications Laboratory of Ocean College, Zhejiang University. The roadmap of future studies is also briefly discussed.
{"title":"Underwater wireless optical communication: A review","authors":"Chuying Yu, Meiwei Kong, Bin Sun, Jing Xu","doi":"10.1109/ICCCHINAW.2017.8355269","DOIUrl":"https://doi.org/10.1109/ICCCHINAW.2017.8355269","url":null,"abstract":"This paper aims in providing a brief glimpse at recent works on underwater wireless optical communication (UWOC) that are carried out in the Optical Communications Laboratory of Ocean College, Zhejiang University. The roadmap of future studies is also briefly discussed.","PeriodicalId":164833,"journal":{"name":"2017 IEEE/CIC International Conference on Communications in China (ICCC Workshops)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132002324","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 : 2017-10-01DOI: 10.1109/ICCCHINAW.2017.8355279
Yu Song, Zhi Wang, Peng Liu
The co-frequency co-time full-duplex, which refers to the transmission and reception at same time using the same frequency-band, can significantly increase the throughput of wireless networks. For the multi-hop transmission based wireless networks, we develop a novel Synchronous Distributed Full-Duplex medium access control (SD-FD MAC) protocol to efficiently increase the throughput for each end-to-end data flow. Our developed SD-FD MAC protocol offers higher opportunities for data transmissions as compared with the traditional half-duplex MAC protocols. Simulation results verified the throughput increase using our developed SD-FD MAC protocol.
{"title":"Synchronous full-duplex MAC protocol for multi-hop wireless networks","authors":"Yu Song, Zhi Wang, Peng Liu","doi":"10.1109/ICCCHINAW.2017.8355279","DOIUrl":"https://doi.org/10.1109/ICCCHINAW.2017.8355279","url":null,"abstract":"The co-frequency co-time full-duplex, which refers to the transmission and reception at same time using the same frequency-band, can significantly increase the throughput of wireless networks. For the multi-hop transmission based wireless networks, we develop a novel Synchronous Distributed Full-Duplex medium access control (SD-FD MAC) protocol to efficiently increase the throughput for each end-to-end data flow. Our developed SD-FD MAC protocol offers higher opportunities for data transmissions as compared with the traditional half-duplex MAC protocols. Simulation results verified the throughput increase using our developed SD-FD MAC protocol.","PeriodicalId":164833,"journal":{"name":"2017 IEEE/CIC International Conference on Communications in China (ICCC Workshops)","volume":"377 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126718166","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：