Journal of Communications and Information Networks最新文献_第5页

Plotinus: A Satellite Internet Digital Twin System 普罗提诺卫星互联网数字孪生系统

Journal of Communications and Information Networks Pub Date : 2024-03-01 DOI: 10.23919/JCIN.2024.10494942

Yue Gao;Kun Qiu;Zhe Chen;Wenjun Zhu;Qi Zhang;Handong Luo;Quanwei Lin;Ziheng Yang;Wenhao Liu

{"title":"Plotinus: A Satellite Internet Digital Twin System","authors":"Yue Gao;Kun Qiu;Zhe Chen;Wenjun Zhu;Qi Zhang;Handong Luo;Quanwei Lin;Ziheng Yang;Wenhao Liu","doi":"10.23919/JCIN.2024.10494942","DOIUrl":"https://doi.org/10.23919/JCIN.2024.10494942","url":null,"abstract":"The development of space-air-ground integrated networks (SAGIN) requires sophisticated satellite Internet emulation tools that can handle complex, dynamic topologies and offer in-depth analysis. Existing emulation platforms struggle with challenges like the need for detailed implementation across all network layers, real-time response, and scalability. This paper proposes a digital twin system based on microservices for satellite Internet emulation, namely Plotinus, which aims to solve these problems. Plotinus features a modular design, allowing for easy replacement of the physical layer to emulate different aerial vehicles and analyze channel interference. It also enables replacing of path computation methods to simplify testing and deploying algorithms. In particular, Plotinus allows for real-time emulation with live network traffic, enhancing practical network models. The evaluation result shows Plotinus's effective emulation of dynamic satellite networks with real-world devices. Its adaptability for various communication models and algorithm testing highlights Plotinus's role as a vital tool for developing and analyzing SAGIN systems, offering a cross-layer, real-time, and scalable digital twin system.","PeriodicalId":100766,"journal":{"name":"Journal of Communications and Information Networks","volume":"9 1","pages":"24-33"},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140537316","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}

引用次数: 0

Statistical QoS Provisioning Architecture for 6G Satellite-Terrestrial Integrated Networks 6G 卫星-地面集成网络的统计 QoS 供应架构

Journal of Communications and Information Networks Pub Date : 2024-03-01 DOI: 10.23919/JCIN.2024.10494937

Jingqing Wang;Wenchi Cheng;Wei Zhang;Hui Liang

{"title":"Statistical QoS Provisioning Architecture for 6G Satellite-Terrestrial Integrated Networks","authors":"Jingqing Wang;Wenchi Cheng;Wei Zhang;Hui Liang","doi":"10.23919/JCIN.2024.10494937","DOIUrl":"https://doi.org/10.23919/JCIN.2024.10494937","url":null,"abstract":"The emergence of massive ultra-reliable and low latency communications (mURLLC) as a category of age/time/reliability-sensitive service over 6G wireless networks has received considerable research attention, which has presented unprecedented challenges. As one of the key enablers for 6G, satellite-terrestrial integrated networks (STIN) have been developed to offer more expansive connectivity and comprehensive 3D coverage in space-aerial-terrestrial domains for supporting 6G mission-critical mURLLC applications while fulfilling diverse and rigorous quality of service (QoS) requirements. In the context of these mURLLC-driven satellite services, data freshness assumes paramount importance, as outdated data may engender unpredictable or catastrophic outcomes. To effectively measure data freshness in satellite-terrestrial integrated communications, age of information (AoI) has recently surfaced as a new dimension of QoS metric to support time-sensitive applications. It is crucial to design new analytical models that ensure stringent and diverse QoS metrics bounded by different key parameters, including AoI, delay, and reliability, over 6G satellite-terrestrial integrated networks. However, due to the complicated and dynamic nature of satellite-terrestrial integrated network environments, the research on efficiently defining new statistical QoS provisioning schemes while taking into account varying degrees of freedom has still been in their infancy. To remedy these deficiencies, in this paper we develop statistical QoS provisioning schemes over 6G satellite-terrestrial integrated networks in the finite blocklength regime. Particularly, we firstly introduce and review key technologies for supporting mURLLC. Secondly, we formulate a number of novel fundamental statistical-QoS metrics in the finite blocklength regime. Finally, we conduct a set of simulations to validate and evaluate our developed statistical QoS provisioning schemes over satellite-terrestrial integrated networks.","PeriodicalId":100766,"journal":{"name":"Journal of Communications and Information Networks","volume":"9 1","pages":"34-42"},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140537315","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}

引用次数: 0

Design and Implementation of a Time Synchronization Method for UOWC Networks UOWC 网络时间同步方法的设计与实施

Journal of Communications and Information Networks Pub Date : 2024-03-01 DOI: 10.23919/JCIN.2024.10494944

Weijie Liu;Jingyi Zhang;Nuo Huang;Zhengyuan Xu

{"title":"Design and Implementation of a Time Synchronization Method for UOWC Networks","authors":"Weijie Liu;Jingyi Zhang;Nuo Huang;Zhengyuan Xu","doi":"10.23919/JCIN.2024.10494944","DOIUrl":"https://doi.org/10.23919/JCIN.2024.10494944","url":null,"abstract":"Underwater optical wireless communication (UOWC) technology facilitates high-speed data transmission among multiple nodes in underwater networks. Nevertheless, the absence of a common clock poses a challenge to achieving systematic and reliable access for multiple nodes within these networks. This paper presents a time synchronization method for UOWC networks to ensure the successful execution of the media access control (MAC) protocol. In this method, the node obtains timestamps by exchanging messages with the optical access point (OAP). Subsequently, the node calculates the clock drift relative to the OAP and the propagation time, ensuring that transmitted data packets can arrive approximately at the time specified by the OAP. To validate the effect of the proposed method, an experimental UOWC prototype, including the OAP and nodes, is implemented using field programmable gate array (FPGA). The experimental results demonstrate that the maximum difference between the actual arrival times of two data packets that are expected to reach the OAP simultaneously according to the MAC protocol meets the requirements of the quasi-synchronous code division multiple access (OS-CDMA) system, thereby substantiating the effectiveness of this synchronization method.","PeriodicalId":100766,"journal":{"name":"Journal of Communications and Information Networks","volume":"9 1","pages":"56-63"},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140537415","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}

引用次数: 0

Resource Allocation for Channel Estimation in Reconfigurable Intelligent Surface-Aided Multi-Cell Networks 可重构智能表面辅助多蜂窝网络中信道估计的资源分配

Journal of Communications and Information Networks Pub Date : 2024-03-01 DOI: 10.23919/JCIN.2024.10494925

Yining Xu;Sheng Zhou

{"title":"Resource Allocation for Channel Estimation in Reconfigurable Intelligent Surface-Aided Multi-Cell Networks","authors":"Yining Xu;Sheng Zhou","doi":"10.23919/JCIN.2024.10494925","DOIUrl":"https://doi.org/10.23919/JCIN.2024.10494925","url":null,"abstract":"Reconfigurable intelligent surface (RIS) is a promising solution to deal with the blockage-sensitivity of millimeter wave band and reduce the high energy consumption caused by network densification. However, deploying large scale RISs may not bring expected performance gain due to significant channel estimation overhead and non-negligible reflected interference. In this paper, we derive the analytical expressions of the coverage probability, area spectrum efficiency (ASE) and energy efficiency (EE) of a downlink RIS-aided multi-cell network. In order to optimize the network performance, we investigate the conditions for the optimal number of training symbols of each antenna-to-antenna and antenna-to-element path (referred to as the optimal unit training overhead) in channel estimation. Our study shows that: 1) RIS deployment is not “the more, the better”, only when blockage objects are dense should one deploy more RISs; 2) the coverage probability is maximized when the unit training overhead is designed as large as possible; 3) however, the ASE-and-EE-optimal unit training overhead exists. It is a monotonically increasing function of the frame length and a monotonically decreasing function of the average signal-to-noise-ratio (in the high signal-to-noise-ratio region). Additionally, the optimal unit training overhead is smaller when communication nodes deploy particularly few or many antennas.","PeriodicalId":100766,"journal":{"name":"Journal of Communications and Information Networks","volume":"9 1","pages":"64-79"},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140537413","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}

引用次数: 0

Ultra-Wideband Millimeter-Wave Vortex Beam Generation Based on Reflective Pancharatnam-Berry Phase Metasurface 基于反射式 Pancharatnam-Berry 相元表面的超宽带毫米波涡旋光束生成技术

Journal of Communications and Information Networks Pub Date : 2023-12-01 DOI: 10.23919/JCIN.2023.10387246

Tingting Zhang;Xuehong Sun;Yanpeng Zhang;Liping Liu

{"title":"Ultra-Wideband Millimeter-Wave Vortex Beam Generation Based on Reflective Pancharatnam-Berry Phase Metasurface","authors":"Tingting Zhang;Xuehong Sun;Yanpeng Zhang;Liping Liu","doi":"10.23919/JCIN.2023.10387246","DOIUrl":"https://doi.org/10.23919/JCIN.2023.10387246","url":null,"abstract":"Due to the gradual scarcity of spectrum resources, orbital angular momentum (OAM) technology has been proposed and developed continuously to broaden channel capacity. To solve this problem, some ultra-wideband reflective phase metasurface antennas working in millimeter band are designed to generate high purity vortex waves which carry OAM. Based on the Pancharatnam-Berry (PB) phase concept, the unit cell is composed of a metasurface, dielectric, metal grounding layer. Through the optimization design of the unit structure parameters, the reflected wave efficiency can be as high as 95% when covering 2π rotating phase, which realizes the basic requirements of PB phase concept and the relative bandwidth of 116%. Then the metasurface arrays are arranged according to vortex wave generation formula and phase compensation principle. In the 25 GHz to 35 GHz frequency wide band, integer (l = ±1, ±2, ±3) decimal (l = ±1.5) and high-mode (l = ±8) OAM vortex beams are generated, respectively. The OAM purity analysis shows that the antennas can generate millimeter wave OAM beams with high purity in a wide band range, and with a maximum gain of up to 23.6 dBi.","PeriodicalId":100766,"journal":{"name":"Journal of Communications and Information Networks","volume":"8 4","pages":"349-356"},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139406694","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}

引用次数: 0

Deep Learning-Assisted OFDM Detection with Hardware Impairments 有硬件缺陷的深度学习辅助 OFDM 检测

Journal of Communications and Information Networks Pub Date : 2023-12-01 DOI: 10.23919/JCIN.2023.10387269

Amit Singh;Sanjeev Sharma;Kuntal Deka;Vimal Bhatia

{"title":"Deep Learning-Assisted OFDM Detection with Hardware Impairments","authors":"Amit Singh;Sanjeev Sharma;Kuntal Deka;Vimal Bhatia","doi":"10.23919/JCIN.2023.10387269","DOIUrl":"https://doi.org/10.23919/JCIN.2023.10387269","url":null,"abstract":"This paper introduces a deep learning (DL) algorithm for estimating doubly-selective fading channel and detecting signals in orthogonal frequency division multiplexing (OFDM) communication systems affected by hardware impairments (HIs). In practice, hardware imperfections are present at the transceivers, which are modeled as direct current (DC) offset, carrier frequency offset (CFO), and in-phase and quadrature-phase (IQ) imbalance at the transmitter and the receiver in OFDM system. In HIs, the explicit system model could not be mathematically derived, which limits the performance of conventional least square (LS) or minimum mean square error (MMSE) estimators. Thus, we consider time-frequency response of a channel as a 2D image, and unknown values of the channel response are derived using known values at the pilot locations with DL-based image super-resolution, and image restoration techniques. Further, a deep neural network (DNN) is designed to fit the mapping between the received signal and transmit symbols, where the number of outputs equals to the size of the modulation order. Results show that there are no significant effects of HIs on channel estimation and signal detection in the proposed DL-assisted algorithm. The proposed DL-assisted detection improves the OFDM performance as compared to the conventional LS/MMSE under severe HIs.","PeriodicalId":100766,"journal":{"name":"Journal of Communications and Information Networks","volume":"8 4","pages":"378-388"},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139406691","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}

引用次数: 0

Full-Duplex Cooperative Relaying with Non-Linear Energy Harvesting for Vehicular Communication 利用非线性能量收集实现车载通信的全双工合作中继

Journal of Communications and Information Networks Pub Date : 2023-12-01 DOI: 10.23919/JCIN.2023.10387268

Vaijayanti Panse;Tapan Kumar Jain

{"title":"Full-Duplex Cooperative Relaying with Non-Linear Energy Harvesting for Vehicular Communication","authors":"Vaijayanti Panse;Tapan Kumar Jain","doi":"10.23919/JCIN.2023.10387268","DOIUrl":"https://doi.org/10.23919/JCIN.2023.10387268","url":null,"abstract":"This paper analyses the performance of full- duplex (FD) dual-hop vehicular cooperative network with decode-and-forward (DF) protocol. At FD relay nodes, we examine the effects of non-linear hybrid power time splitting (PTS) based energy harvesting (EH). All three nodes—source (S), relay (R), and destination (D)—are assumed to be moving vehicles. The expressions for the system’s outage probability (OP) over double (cascaded) Rayleigh fading channels are derived. We also analyse the impact of residual self-interference (RSI) caused at FD relay on system’s performance. We compare the performance of system with two relay selection techniques, namely, maximum channel gain-based (Max-G) relay selection and minimum RSI-based (Min-SI) relay selection. This paper considers the joint effect of time splitting ratio and self-interference cancellation (SIC) level to find the optimum EH duration. Additionally, the effect of time splitting ratio and average signal-to-noise ratio (SNR) on outage and throughput performance of the system are also investigated in this paper. The derived expressions are validated through Monte Carlo simulations.","PeriodicalId":100766,"journal":{"name":"Journal of Communications and Information Networks","volume":"8 4","pages":"369-377"},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139406715","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}

引用次数: 0

Resource Allocation for URLLC with Parameter Generation Network 带参数生成网络的 URLLC 的资源分配

Journal of Communications and Information Networks Pub Date : 2023-12-01 DOI: 10.23919/JCIN.2023.10387243

Jiajun Wu;Chengjian Sun;Chenyang Yang

{"title":"Resource Allocation for URLLC with Parameter Generation Network","authors":"Jiajun Wu;Chengjian Sun;Chenyang Yang","doi":"10.23919/JCIN.2023.10387243","DOIUrl":"https://doi.org/10.23919/JCIN.2023.10387243","url":null,"abstract":"Deep learning enables real-time resource allocation for ultra-reliable and low-latency communications (URLLC), one of the major use cases in the next-generation cellular networks. Yet the high training complexity and weak generalization ability of neural networks impede the practical use of the learning-based methods in dynamic wireless environments. To overcome these obstacles, we propose a parameter generation network (PGN) to efficiently learn bandwidth and power allocation policies in URLLC. The PGN consists of two types of fully-connected neural networks (FNNs). One is a policy network, which is used to learn a resource allocation policy or a Lagrangian multiplier function. The other type of FNNs are hypernetworks, which are designed to learn the weight matrices and bias vectors of the policy network. Only the hypernetworks require training. Using the well-trained hypernetworks, the policy network is generated through forward propagation in the test phase. By introducing a simple data processing, the hypernetworks can well learn the weight matrices and bias vectors by inputting their indices, resulting in low training cost. Simulation results demonstrate that the learned bandwidth and power allocation policies by the PGNs perform very close to a numerical algorithm. Moreover, the PGNs can be well generalized to the number of users and wireless channels, and are with significantly lower memory costs, fewer training samples, and shorter training time than the traditional learning-based methods.","PeriodicalId":100766,"journal":{"name":"Journal of Communications and Information Networks","volume":"8 4","pages":"319-328"},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139406602","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}

引用次数: 0

A Model-Driven Approach to Enhance Faster-than-Nyquist Signaling over Nonlinear Channels 通过非线性信道增强快于奈奎斯特信号的模型驱动法

Journal of Communications and Information Networks Pub Date : 2023-12-01 DOI: 10.23919/JCIN.2023.10387245

Tongzhou Yu;Baoming Bai;Ruimin Yuan;Chao Chen

{"title":"A Model-Driven Approach to Enhance Faster-than-Nyquist Signaling over Nonlinear Channels","authors":"Tongzhou Yu;Baoming Bai;Ruimin Yuan;Chao Chen","doi":"10.23919/JCIN.2023.10387245","DOIUrl":"https://doi.org/10.23919/JCIN.2023.10387245","url":null,"abstract":"In order to increase the capacity of future satellite communication systems, faster-than-Nyquist (FTN) signaling is increasingly considered. Existing methods for compensating for the high power amplifier (HPA) nonlinearity require perfect knowledge of the HPA model. To address this issue, we analyze the FTN symbol distribution and propose a complex-valued deep neural network (CVDNN) aided compensation scheme for the HPA nonlinearity, which does not require perfect knowledge of the HPA model and can learn the HPA nonlinearity during the training process. A model-driven network for nonlinearity compensation is proposed to further enhance the performance. Furthermore, two training sets based on the FTN symbol distribution are designed for training the network. Extensive simulations show that the Gaussian distribution is a good approximation of the FTN symbol distribution. The proposed model-driven network trained by employing a Gaussian distribution to approximate an FTN signaling can achieve a performance gain of 0.5 dB compared with existing methods without HPA's parameters at the receiver. The proposed neural network is also applicable for non-linear compensation in other systems, including orthogonal frequency-division multiplexing (OFDM).","PeriodicalId":100766,"journal":{"name":"Journal of Communications and Information Networks","volume":"8 4","pages":"341-348"},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139406693","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}

引用次数: 0

3D Radio Map Reconstruction and Trajectory Optimization for Cellular-Connected UAVs 蜂窝连接无人飞行器的 3D 无线电地图重构和轨迹优化

Journal of Communications and Information Networks Pub Date : 2023-12-01 DOI: 10.23919/JCIN.2023.10387267

Qiuhu Gong;Fahui Wu;Dingcheng Yang;Lin Xiao;Zemin Liu

{"title":"3D Radio Map Reconstruction and Trajectory Optimization for Cellular-Connected UAVs","authors":"Qiuhu Gong;Fahui Wu;Dingcheng Yang;Lin Xiao;Zemin Liu","doi":"10.23919/JCIN.2023.10387267","DOIUrl":"https://doi.org/10.23919/JCIN.2023.10387267","url":null,"abstract":"This paper introduces an innovative approach to address the trajectory optimization challenge for cellular-connected unmanned aerial vehicles (UAVs) operating in three-dimensional (3D) space. In most cases, optimizing UAV trajectories necessitates ensuring reliable network connectivity. However, achieving dependable connectivity in 3D space poses a significant challenge due to terrestrial base stations primarily designed for ground users. Additionally, UAVs possess network information only for the areas they have visited, with global network information being inaccessible. To address this issue, we propose a collaborative approach in which multiple UAVs create a global model of outage probability using federated learning, enabling more precise and effective trajectory design. Building upon the constructed global information, we conduct the trajectory design. Initially, we introduce A-star (A∗) algorithm for trajectory design in small-scale scenarios. Nevertheless, recognizing the limitations of A∗ algorithm in large-scale scenarios, we further introduce improved rapidly-exploring random trees (RRTs) algorithm for weighted path optimization. Simulation results are provided to validate the effectiveness of the proposed algorithms.","PeriodicalId":100766,"journal":{"name":"Journal of Communications and Information Networks","volume":"8 4","pages":"357-368"},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139406692","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}

引用次数: 0