ETRI Journal最新文献_第5页

Vehicle counting in drone images: An adaptive method with spatial attention and multiscale receptive fields 无人机图像中的车辆计数：一种具有空间注意和多尺度接受域的自适应方法

IF 1.3 4区计算机科学

ETRI Journal Pub Date : 2024-05-27 DOI: 10.4218/etrij.2023-0426

Yu Liu, Hang Shen, Tianjing Wang, Guangwei Bai

{"title":"Vehicle counting in drone images: An adaptive method with spatial attention and multiscale receptive fields","authors":"Yu Liu, Hang Shen, Tianjing Wang, Guangwei Bai","doi":"10.4218/etrij.2023-0426","DOIUrl":"https://doi.org/10.4218/etrij.2023-0426","url":null,"abstract":"We propose an altitude-adaptive vehicle counting method with an attention mechanism and multiscale receptive fields that optimizes the measurement accuracy and inference latency of unmanned aerial vehicle (UAV) images. An attention mechanism is used to aggregate horizontal and vertical feature weights to enhance spatial information and suppress background noise. The UAV flight altitude and shooting depression angle are considered for scale division and image segmentation to avoid acquiring distance measurements. Based on the dilation rate, we introduce a receptive field selection strategy for the trained model to exhibit scale generalization without redundant calculations. A distribution-aware block loss is optimized via \u0000<math>\u0000 <mi>k</mi></math> roots to balance the loss of sparse and crowded regions by dividing the density map. Experiments on three authoritative datasets demonstrate that compared with CSRNet, the proposed method improves the mean absolute error by 29.4%–54.0% and mean squared error by 28.6%–41.2% while reducing the inference latency. The proposed method exhibits higher counting accuracy than lightweight models including MCNN and MobileCount.","PeriodicalId":11901,"journal":{"name":"ETRI Journal","volume":"47 1","pages":"7-19"},"PeriodicalIF":1.3,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.4218/etrij.2023-0426","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143497410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improved VoWiFi cell capacity using A-MPDU for frame aggregation in sixth-generation WLAN standard 在第六代无线局域网标准中使用 A-MPDU 进行帧聚合，提高 VoWiFi 小区容量

IF 1.3 4区计算机科学

ETRI Journal Pub Date : 2024-05-20 DOI: 10.4218/etrij.2023-0333

Ayes Chinmay, Hemanta Kumar Pati

{"title":"Improved VoWiFi cell capacity using A-MPDU for frame aggregation in sixth-generation WLAN standard","authors":"Ayes Chinmay, Hemanta Kumar Pati","doi":"10.4218/etrij.2023-0333","DOIUrl":"10.4218/etrij.2023-0333","url":null,"abstract":"The rapid progress in wireless communication technology and proliferation of multimedia applications, including voice over WiFi (VoWiFi), demand exploration of innovative approaches to enhance the network performance and quality of service. We propose a technique for enhancing the cell capacity of wireless local area network (WLAN) access point that provides VoWiFi service in the sixth-generation WLAN standard. The proposed technique uses the aggregate media access control protocol data unit (A-MPDU) for frame aggregation with constant bit rate (CBR) traffic in the WiFi 6 standard (i.e., IEEE 802.11ax). On the other hand, the retransmission of voice packets substantially deteriorates the VoWiFi cell capacity. We compare the results obtained from the use of WiFi 6 with currently existing WLAN standards, such as IEEE 802.11b/g/n/ac. This comparison focuses on distributed coordination function interframe spacing (DIFS) and arbitration interframe spacing (AIFS) using CBR traffic. Using our technique, we can increase the VoWiFi cell capacity for CBR traffic by 24.25% and 25.20% when using DIFS and AIFS, respectively, while considering the A-MPDU frame aggregation technique.","PeriodicalId":11901,"journal":{"name":"ETRI Journal","volume":"46 6","pages":"965-976"},"PeriodicalIF":1.3,"publicationDate":"2024-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.4218/etrij.2023-0333","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141119983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Low-complexity patch projection method for efficient and lightweight point-cloud compression 用于高效、轻量级点云压缩的低复杂度补丁投影法

IF 1.3 4区计算机科学

ETRI Journal Pub Date : 2024-05-15 DOI: 10.4218/etrij.2023-0242

Sungryeul Rhyu, Junsik Kim, Gwang Hoon Park, Kyuheon Kim

{"title":"Low-complexity patch projection method for efficient and lightweight point-cloud compression","authors":"Sungryeul Rhyu, Junsik Kim, Gwang Hoon Park, Kyuheon Kim","doi":"10.4218/etrij.2023-0242","DOIUrl":"10.4218/etrij.2023-0242","url":null,"abstract":"The point cloud provides viewers with intuitive geometric understanding but requires a huge amount of data. Moving Picture Experts Group (MPEG) has developed video-based point-cloud compression in the range of 300–700. As the compression rate increases, the complexity increases to the extent that it takes 101.36 s to compress one frame in an experimental environment using a personal computer. To realize real-time point-cloud compression processing, the direct patch projection (DPP) method proposed herein simplifies the complex patch segmentation process by classifying and projecting points according to their geometric positions. The DPP method decreases the complexity of the patch segmentation from 25.75 s to 0.10 s per frame, and the entire process becomes 8.76 times faster than the conventional one. Consequently, this proposed DPP method yields similar peak signal-to-noise ratio (PSNR) outcomes to those of the conventional method at reduced times (4.7–5.5 times) at the cost of bitrate overhead. The objective and subjective results show that the proposed DPP method can be considered when low-complexity requirements are required in lightweight device environments.","PeriodicalId":11901,"journal":{"name":"ETRI Journal","volume":"46 4","pages":"683-696"},"PeriodicalIF":1.3,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.4218/etrij.2023-0242","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140974659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of high-efficiency rectenna for microwave power wireless transmission systems 设计用于微波功率无线传输系统的高效整流器天线

IF 1.3 4区计算机科学

ETRI Journal Pub Date : 2024-05-14 DOI: 10.4218/etrij.2023-0290

Jia-Xiang Chen, Zhong-Hua Ma, Chen Li, Meng-Nan Wang, Hai-Tao Xing, Wei-Qian Liang, Yan-Feng Jiang

{"title":"Design of high-efficiency rectenna for microwave power wireless transmission systems","authors":"Jia-Xiang Chen, Zhong-Hua Ma, Chen Li, Meng-Nan Wang, Hai-Tao Xing, Wei-Qian Liang, Yan-Feng Jiang","doi":"10.4218/etrij.2023-0290","DOIUrl":"10.4218/etrij.2023-0290","url":null,"abstract":"Radio power transmission is studied herein. A rectenna with high-efficiency microwave power transmission is proposed. Improvement on the traditional Yagi antenna structure is implemented by using a rectenna. In this design, the antenna is fed by a coplanar waveguide, and the impedance bandwidth is widened by adding a set of radiation dipoles. A set of parasitic directors is used to enhance the directionality of the antenna. A rectifier circuit based on a power-recovery network is designed using an open branch-line network with harmonic rejection characteristics as a low-pass filter. The rectifier network topology is adopted with a diode in parallel connection to increase the output voltage of the circuit. The reflected power generated by the impedance mismatch can be recycled by the power-recovery network. Thus, the rectifying efficiency can be improved. Finally, experimental data show that the radiofrequency–direct current power conversion efficiency of the rectenna can be as high as 77.5% at the operating frequency 2.45 GHz and the input power 12 dBm. The proposed rectenna can be potentially used for the power supply of various wireless sensor nodes with high efficiency.","PeriodicalId":11901,"journal":{"name":"ETRI Journal","volume":"46 6","pages":"1103-1112"},"PeriodicalIF":1.3,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.4218/etrij.2023-0290","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140980107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Energy efficiency assessment of wireless system exploiting multiple reconfigurable intelligent surfaces with hardware impairments 利用具有硬件损伤的多个可重构智能表面的无线系统能效评估

IF 1.3 4区计算机科学

ETRI Journal Pub Date : 2024-05-09 DOI: 10.4218/etrij.2023-0456

Nguyen Van Vinh

{"title":"Energy efficiency assessment of wireless system exploiting multiple reconfigurable intelligent surfaces with hardware impairments","authors":"Nguyen Van Vinh","doi":"10.4218/etrij.2023-0456","DOIUrl":"10.4218/etrij.2023-0456","url":null,"abstract":"This article explores a practical scenario with hardware impairments (HIs) in a multireconfigurable intelligent surface (RIS) assisted wireless system. This approach is based on a mathematical analysis of the performance of the HI-RIS system. To this end, a closed-form expression of the energy efficiency (EE) and its asymptotic behavior, particularly in regions with high transmit power, are derived. Next, an analysis was conducted to compare the EE of the HI-RIS system with those of relevant systems: the ideal hardware (ID)-RIS system, HI-point-to-point (P2P) system (without RISs), and ID-P2P system (without RISs). The numerical findings unequivocally demonstrate that the incorporation of RISs substantially enhances the EE of the HI-RIS system, particularly at high transmit rates. However, at low transmit rates, the EE of the HI-RIS system less than that of the HI-P2P system. This trend is also reflected in the EEs of the ID-RIS and ID-P2P systems. Moreover, the significant impact of HI on the EEs of the HI-RIS and HI-P2P systems is analyzed. The effects of crucial system parameters, such as the number of reflecting elements, frequencies of WiFi networks, and fading order, are comprehensively determined to provide insights into the behaviors of the HI-RIS system. The outage probability and throughput behaviors of the HI-RIS system are also evaluated to comprehensively analyze of the benefits of RISs and the effects of HI. Finally, the accuracy of the derived expressions was verified using Monte Carlo simulations.","PeriodicalId":11901,"journal":{"name":"ETRI Journal","volume":"47 2","pages":"193-207"},"PeriodicalIF":1.3,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.4218/etrij.2023-0456","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140994054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A sum-rate maximization for IRS-aided broadcast SWIPT with time-switching structure and nonlinear energy harvester 具有时间开关结构和非线性能量收集器的 IRS 辅助广播 SWIPT 的总速率最大化方法

IF 1.3 4区计算机科学

ETRI Journal Pub Date : 2024-05-09 DOI: 10.4218/etrij.2023-0418

Pham Ngoc Son, Pham Viet Tuan, Van Hiep VU, Mai T. P. Le, Vien Nguyen-Duy-Nhat

{"title":"A sum-rate maximization for IRS-aided broadcast SWIPT with time-switching structure and nonlinear energy harvester","authors":"Pham Ngoc Son, Pham Viet Tuan, Van Hiep VU, Mai T. P. Le, Vien Nguyen-Duy-Nhat","doi":"10.4218/etrij.2023-0418","DOIUrl":"10.4218/etrij.2023-0418","url":null,"abstract":"This study evaluates the sum-rate gain of the intelligent reflecting surface (IRS) in a broadcast simultaneous wireless information and power transfer network. Users are equipped with a time-switching (TS) structure for an alternating information decoder and a nonlinear energy harvester. The sum-rate maximization (SRM) problem is formulated subject to the constraints of the energy-harvesting threshold required by users and limited transmission power at the base station (BS). To address the SRM problem, we jointly designed a broadcast beamforming precoding vector at the BS, reflective phase shifters at the IRS, and TS factors at the users. Subsequently, after certain manipulations, we propose efficient iterative algorithms that combine alternating optimization, successive convex approximation, semidefinite relaxation, and rank-one penalty function methods to obtain a suboptimal solution. Finally, the numerical results show the promising sum-rate gain of the proposed scheme compared with the conventional schemes.","PeriodicalId":11901,"journal":{"name":"ETRI Journal","volume":"47 1","pages":"20-35"},"PeriodicalIF":1.3,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.4218/etrij.2023-0418","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140994657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An efficient dual layer data aggregation scheme in clustered wireless sensor networks 集群无线传感器网络中的高效双层数据聚合方案

IF 1.3 4区计算机科学

ETRI Journal Pub Date : 2024-05-06 DOI: 10.4218/etrij.2023-0214

Fenting Yang, Zhen Xu, Lei Yang

{"title":"An efficient dual layer data aggregation scheme in clustered wireless sensor networks","authors":"Fenting Yang, Zhen Xu, Lei Yang","doi":"10.4218/etrij.2023-0214","DOIUrl":"10.4218/etrij.2023-0214","url":null,"abstract":"In wireless sensor network (WSN) monitoring systems, redundant data from sluggish environmental changes and overlapping sensing ranges can increase the volume of data sent by nodes, degrade the efficiency of information collection, and lead to the death of sensor nodes. To reduce the energy consumption of sensor nodes and prolong the life of WSNs, this study proposes a dual layer intracluster data fusion scheme based on ring buffer. To reduce redundant data and temporary anomalous data while guaranteeing the temporal coherence of data, the source nodes employ a binarized similarity function and sliding quartile detection based on the ring buffer. Based on the improved support degree function of weighted Pearson distance, the cluster head node performs a weighted fusion on the data received from the source nodes. Experimental results reveal that the scheme proposed in this study has clear advantages in three aspects: the number of remaining nodes, residual energy, and the number of packets transmitted. The data fusion of the proposed scheme is confined to the data fusion of the same attribute environment parameters.","PeriodicalId":11901,"journal":{"name":"ETRI Journal","volume":"46 4","pages":"604-618"},"PeriodicalIF":1.3,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.4218/etrij.2023-0214","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141006889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficient pitch-estimation network for edge devices 用于边缘设备的高效螺距估计网络

IF 1.3 4区计算机科学

ETRI Journal Pub Date : 2024-05-02 DOI: 10.4218/etrij.2023-0430

Chi Yoon Jeong, Youngmi Song, Sungyong Shin, Mooseop Kim

{"title":"Efficient pitch-estimation network for edge devices","authors":"Chi Yoon Jeong, Youngmi Song, Sungyong Shin, Mooseop Kim","doi":"10.4218/etrij.2023-0430","DOIUrl":"10.4218/etrij.2023-0430","url":null,"abstract":"Pitch estimation is the task of finding the most conspicuous frequency in a complex audio signal. Many methods that use deep neural networks have significantly increased the accuracy of pitch estimation; however, their real-time performance results were achieved on high-performance devices. Because pitch estimation is widely used in real-time applications on low-power devices, we propose an efficient method for estimating pitch on edge devices. The network architecture of the proposed method uses a depth-scaling strategy and fully leverages convolutional networks. We further introduce a channel attention mechanism to increase accuracy without increasing computational overhead. We compared the proposed model with state-of-the-art (SOTA) and conventional methods using two public datasets. The experimental results show that the proposed method has a better classification accuracy than FCNF0++, which is the best performing SOTA model. Furthermore, it reduces the processing time obtained by FCNF0++ on a personal computer and two edge devices by 48% on average. These experimental results confirm that the proposed method efficiently classifies pitch on edge devices.","PeriodicalId":11901,"journal":{"name":"ETRI Journal","volume":"47 1","pages":"112-122"},"PeriodicalIF":1.3,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.4218/etrij.2023-0430","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141022061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Writer verification using feature selection based on genetic algorithm: A case study on handwritten Bangla dataset 利用基于遗传算法的特征选择进行作家验证：手写孟加拉语数据集案例研究

IF 1.3 4区计算机科学

ETRI Journal Pub Date : 2024-04-28 DOI: 10.4218/etrij.2023-0188

Jaya Paul, Kalpita Dutta, Anasua Sarkar, Kaushik Roy, Nibaran Das

{"title":"Writer verification using feature selection based on genetic algorithm: A case study on handwritten Bangla dataset","authors":"Jaya Paul, Kalpita Dutta, Anasua Sarkar, Kaushik Roy, Nibaran Das","doi":"10.4218/etrij.2023-0188","DOIUrl":"https://doi.org/10.4218/etrij.2023-0188","url":null,"abstract":"Author verification is challenging because of the diversity in writing styles. We propose an enhanced handwriting verification method that combines handcrafted and automatically extracted features. The method uses a genetic algorithm to reduce the dimensionality of the feature set. We consider offline Bangla handwriting content and evaluate the proposed method using handcrafted features with a simple logistic regression, radial basis function network, and sequential minimal optimization as well as automatically extracted features using a convolutional neural network. The handcrafted features outperform the automatically extracted ones, achieving an average verification accuracy of 94.54% for 100 writers. The handcrafted features include Radon transform, histogram of oriented gradients, local phase quantization, and local binary patterns from interwriter and intrawriter content. The genetic algorithm reduces the feature dimensionality and selects salient features using a support vector machine. The top five experimental results are obtained from the optimal feature set selected using a consensus strategy. Comparisons with other methods and features confirm the satisfactory results.","PeriodicalId":11901,"journal":{"name":"ETRI Journal","volume":"46 4","pages":"648-659"},"PeriodicalIF":1.3,"publicationDate":"2024-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.4218/etrij.2023-0188","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141980503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reducing peak-to-average power ratio of filtered non-orthogonal multiple access and new radio 5g waveforms using hybrid partial transmit sequence-companding technique 利用混合部分发射序列压缩技术降低滤波后非正交多址和新型无线5g波形的峰均功率比

IF 1.3 4区计算机科学

ETRI Journal Pub Date : 2024-04-26 DOI: 10.4218/etrij.2023-0405

Arun Kumar, Karthikeyan Rajagopal, Nishant Gaur, Aziz Nanthaamornphong

{"title":"Reducing peak-to-average power ratio of filtered non-orthogonal multiple access and new radio 5g waveforms using hybrid partial transmit sequence-companding technique","authors":"Arun Kumar, Karthikeyan Rajagopal, Nishant Gaur, Aziz Nanthaamornphong","doi":"10.4218/etrij.2023-0405","DOIUrl":"https://doi.org/10.4218/etrij.2023-0405","url":null,"abstract":"For fifth-generation (5G) and beyond 5G communications, filtered nonorthogonal multiple access (F-NOMA) can be used as a waveform contender. Filtering-based waveform frameworks provide suppression of out-of-band emission (OOBE) and asynchronous transmission. For new types of waveforms, a high peak-to-average power ratio (PAPR) remains a challenge. A high PAPR in multicarrier systems can be efficiently mitigated by applying partial transmit sequence (PTS). Combining PAPR reduction techniques can improve the transmission efficiency by nonlinearly scaling the signal amplitudes before transmission and inversely scaling them at the receiver. We propose a hybrid technique that combines PTS and companding to reduce the PAPR in an F-NOMA system. Conventional nonorthogonal multiple access (NOMA) is compared with F-NOMA, and systems with and without the hybrid technique are examined regarding metrics including the power spectral density, bit error rate (BER), and computational complexity. Compared with NOMA, simulation results show that F-NOMA using the proposed technique improves the PAPR and OOBE while preserving the BER performance of F-NOMA.","PeriodicalId":11901,"journal":{"name":"ETRI Journal","volume":"47 1","pages":"36-46"},"PeriodicalIF":1.3,"publicationDate":"2024-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.4218/etrij.2023-0405","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143497296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0