Chinese Journal of Electronics最新文献_第2页

Towards Reliable Configuration Management in Clouds: A Lightweight Consistency Validation Mechanism for Virtual Private Clouds

IF 1.6 4区计算机科学

Chinese Journal of Electronics Pub Date : 2025-01-01 DOI: 10.23919/cje.2023.00.387

Yuhang Qiu;Gongming Zhao;Hongli Xu;Long Li;He Huang;Liusheng Huang

{"title":"Towards Reliable Configuration Management in Clouds: A Lightweight Consistency Validation Mechanism for Virtual Private Clouds","authors":"Yuhang Qiu;Gongming Zhao;Hongli Xu;Long Li;He Huang;Liusheng Huang","doi":"10.23919/cje.2023.00.387","DOIUrl":"https://doi.org/10.23919/cje.2023.00.387","url":null,"abstract":"The virtual private cloud service currently lacks a real-time end-to-end consistency validation mechanism, which prevents tenants from receiving immediate feedback on their requests. Existing solutions consume excessive communication and computational resources in such large-scale cloud environments, and suffer from poor timeliness. To address these issues, we propose a lightweight consistency validation mechanism that includes real-time incremental validation and periodic full-scale validation. The former leverages message layer aggregation to enable tenants to swiftly determine the success of their requests on hosts with minimal communication overhead. The latter utilizes lightweight validation checksums to compare the expected and actual states of hosts locally, while efficiently managing the checksums of various host entries using inverted indexing. This approach enables us to efficiently validate the complete local configurations within the limited memory of hosts. In summary, our proposed mechanism achieves closed-loop implementation for new requests and ensures their long-term effectiveness.","PeriodicalId":50701,"journal":{"name":"Chinese Journal of Electronics","volume":"34 1","pages":"49-63"},"PeriodicalIF":1.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10891985","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438370","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 Review of Terahertz Solid-State Electronic/Optoelectronic Devices and Communication Systems

IF 1.6 4区计算机科学

Chinese Journal of Electronics Pub Date : 2025-01-01 DOI: 10.23919/cje.2023.00.282

Wenbo Li;Hongxin Zeng;Lin Huang;Sen Gong;Haoyi Cao;Weipeng Wang;Zheng Wang;Hongji Zhou;Shixiong Liang;Ziqiang Yang;Yaxin Zhang

引用次数: 0

A Helmet Detection Algorithm Based on Transformers with Deformable Attention Module

IF 1.6 4区计算机科学

Chinese Journal of Electronics Pub Date : 2025-01-01 DOI: 10.23919/cje.2023.00.346

Songle Chen;Hongbo Sun;Yuxin Wu;Lei Shang;Xiukai Ruan

{"title":"A Helmet Detection Algorithm Based on Transformers with Deformable Attention Module","authors":"Songle Chen;Hongbo Sun;Yuxin Wu;Lei Shang;Xiukai Ruan","doi":"10.23919/cje.2023.00.346","DOIUrl":"https://doi.org/10.23919/cje.2023.00.346","url":null,"abstract":"Wearing a helmet is one of the effective measures to protect workers' safety. To address the challenges of severe occlusion, multi-scale, and small target issues in helmet detection, this paper proposes a helmet detection algorithm based on deformable attention transformers. The main contributions of this paper are as follows. A compact end-to-end network architecture for safety helmet detection based on transformers is proposed. It cancels the computationally intensive transformer encoder module in the existing detection transformer (DETR) and uses the transformer decoder module directly on the output of feature extraction for query decoding, which effectively improves the efficiency of helmet detection. A novel feature extraction network named Swin transformer with deformable attention module (DSwin transformer) is proposed. By sparse cross-window attention, it enhances the contextual awareness of multi-scale features extracted by Swin transformer, and keeps high computational efficiency simultaneously. The proposed method generates the query reference points and query embeddings based on the joint prediction probabilities, and selects an appropriate number of decoding feature maps and sparse sampling points for query decoding, which further enhance the inference capability and processing speed. On the benchmark safety-helmet-wearing-dataset (SHWD), the proposed method achieves the average detection accuracy mAP@0.5 of 95.4% with 133.35G floating-point operations per second (FLOPs) and 20 frames per second (FPS), the state-of-the-art method for safety helmet detection.","PeriodicalId":50701,"journal":{"name":"Chinese Journal of Electronics","volume":"34 1","pages":"229-241"},"PeriodicalIF":1.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10891976","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438468","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

Antenna Selection Method for Distributed Dual-Function Radar Communication in MIMO System

IF 1.6 4区计算机科学

Chinese Journal of Electronics Pub Date : 2025-01-01 DOI: 10.23919/cje.2023.00.270

Haitao Zhao;Zhongzheng Ding;Qin Wang;Wenchao Xia;Bo xu;Hongbo Zhu

{"title":"Antenna Selection Method for Distributed Dual-Function Radar Communication in MIMO System","authors":"Haitao Zhao;Zhongzheng Ding;Qin Wang;Wenchao Xia;Bo xu;Hongbo Zhu","doi":"10.23919/cje.2023.00.270","DOIUrl":"https://doi.org/10.23919/cje.2023.00.270","url":null,"abstract":"Distributed dual-function radar system is an emerging trend in next-generation wireless systems, offering the possibility of improved parameter estimation for target localization as well as improved communication performance. With sufficient resource allocation, the achievable minimum estimated mean square error (MSE) and maximum total communication rate of localization may exceed the intended performance metrics of the system, which may consume an excessive number of antennas as well as antenna costs. In order to avoid resource wastage, this paper proposes a distributed dual-function radar communication multiple-input multiple-output (MIMO) system capable of performing radar and communication tasks simultaneously. The distributed system achieves the desired MSE performance metrics and communication performance metrics by efficiently selecting a subset of antennas, and minimizing the number of transmitting antennas and receiving antennas used in the system as well as the cost. In this paper, the problem is modeled as a knapsack problem where the objective is to obtain the maximal MSE performance and the maximal total communication rate performance at the lowest cost, for which we design a heuristic antenna selection algorithm. The designed algorithm is effective in reducing the time complexity as well as reducing the cost of antenna, and minimizing the number of antennas required.","PeriodicalId":50701,"journal":{"name":"Chinese Journal of Electronics","volume":"34 1","pages":"165-175"},"PeriodicalIF":1.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10891981","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438488","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

14-Bit SAR ADC with On-Chip Digital Bubble Sorting Calibration Technology

IF 1.6 4区计算机科学

Chinese Journal of Electronics Pub Date : 2025-01-01 DOI: 10.23919/cje.2023.00.307

Hua Fan;Zhuorui Chen;Tongrui Xu;Franco Maloberti;Qi Wei;Quanyuan Feng

{"title":"14-Bit SAR ADC with On-Chip Digital Bubble Sorting Calibration Technology","authors":"Hua Fan;Zhuorui Chen;Tongrui Xu;Franco Maloberti;Qi Wei;Quanyuan Feng","doi":"10.23919/cje.2023.00.307","DOIUrl":"https://doi.org/10.23919/cje.2023.00.307","url":null,"abstract":"This article designs a 14-bit successive approximation register analog-to-digital converter (SAR ADC). A novel digital bubble sorting calibration method is proposed and applied to eliminate the effect of capacitor mismatch on the linearity of the SAR ADC. To reduce the number of capacitors, a hybrid architecture of a high 8-bit binary-weighted capacitor array and a low 6-bit resistor array is adopted by the digital-to-analog (DAC). The common-mode voltage <tex>$V_{text{CM}}$</tex>-based switching scheme is chosen to reduce the switching energy and area of the DAC. The time-domain comparator is employed to obtain lower power consumption. Sampling is performed through a gate voltage bootstrapped switch to reduce the nonlinear errors introduced when sampling the input signal. Moreover, the SAR logic and the whole calibration is totally implemented on-chip through digital integrated circuit (IC) tools such as design compiler, IC compiler, etc. Finally, a prototype is designed and implemented using 0.18 μm bipolar-complementary metal oxide semiconductor (CMOS)-double-diffused MOS 1.8 V CMOS technology. The measurement results show that the SAR ADC with on-chip bubble sorting calibration method achieves the signal-to-noise-and-distortion ratio of 69.75 dB and the spurious-free dynamic range of 83.77 dB.","PeriodicalId":50701,"journal":{"name":"Chinese Journal of Electronics","volume":"34 1","pages":"125-136"},"PeriodicalIF":1.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10891969","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438491","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 Improved YOLOv7 Tiny Algorithm for Vehicle and Pedestrian Detection with Occlusion in Autonomous Driving

IF 1.6 4区计算机科学

Chinese Journal of Electronics Pub Date : 2025-01-01 DOI: 10.23919/cje.2023.00.256

Jian Su;Fang Wang;Wei Zhuang

{"title":"An Improved YOLOv7 Tiny Algorithm for Vehicle and Pedestrian Detection with Occlusion in Autonomous Driving","authors":"Jian Su;Fang Wang;Wei Zhuang","doi":"10.23919/cje.2023.00.256","DOIUrl":"https://doi.org/10.23919/cje.2023.00.256","url":null,"abstract":"Future transportation is advancing in the direction of intelligent transportation systems, where an essential part is vehicle and pedestrian detection. Due to the complex urban traffic environment, vehicles and pedestrians in road monitoring have different forms of occlusion problems, resulting in the missed detection of objects. We design an improved you only look once version 7 (YOLOv7) tiny algorithm for vehicle and pedestrian detection under occlusion, with the following four main improvements. In order to locate the object more accurately, <tex>$1 times 1$</tex> convolution and identity connection are added to the <tex>$3 times 3$</tex> convolution, and convolution reparameterization is used to enhance the inference speed of the network model. In view of the complex road background and more interference, the coordinate attention was added to the connection part of backbone and neck to enhance the network's capacity to detect the object and lessen interference from other targets. At the same time, before being sent to the detection head, global attention mechanism is added to improve the accuracy of model detection by capturing three-dimensional features. Considering the issue of imbalanced training samples, we propose focal complete intersection over union (CIOU) loss instead of CIOU loss to become the bounding box regression loss, so that the regression process attention to high-quality anchor boxes. Experiments show that the improved YOLOv7 tiny algorithm achieves 82.2% map @ 0.5 in pattern analysis, statistical modelling and computational learning visual object classes dataset, which is 2.8% higher than before the improvement. The performance of map @ 0.5:0.95 is 5.2% better than the previous improvement. The proposed improved algorithm can availably to detect partial occlusion objects.","PeriodicalId":50701,"journal":{"name":"Chinese Journal of Electronics","volume":"34 1","pages":"282-294"},"PeriodicalIF":1.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10891995","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143446190","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

IPFA-Net: Important Points Feature Aggregating Net for Point Cloud Classification and Segmentation

IF 1.6 4区计算机科学

Chinese Journal of Electronics Pub Date : 2025-01-01 DOI: 10.23919/cje.2023.00.065

Jingya Wang;Yu Zhang;Bin Zhang;Jinxiang Xia;Weidong Wang

{"title":"IPFA-Net: Important Points Feature Aggregating Net for Point Cloud Classification and Segmentation","authors":"Jingya Wang;Yu Zhang;Bin Zhang;Jinxiang Xia;Weidong Wang","doi":"10.23919/cje.2023.00.065","DOIUrl":"https://doi.org/10.23919/cje.2023.00.065","url":null,"abstract":"This paper focuses on the problems of point cloud deep neural networks in classification and segmentation tasks, including losing important information during down-sampling, ignoring relationships among points when extracting features, and network performance being susceptible to the sparsity of point cloud. To begin with, this paper proposes a farthest point sampling-important points sampling method for down-sampling, which can preserve important information of point clouds and maintain the geometry of input data. Then, the local feature relation aggregating method is proposed for feature extraction, improving the network's ability to learn contextual information and extract rich local region features. Based on these methods, the important points feature aggregating net (IPFA-Net) is designed for point cloud classification and segmentation tasks. Furthermore, this paper proposes the multi-scale multi-density feature connecting method to reduce the negative impact of point cloud data sparsity on network performance. Finally, the effectiveness of IPFA-Net is demonstrated through experiments on ModelNet40, ShapeNet part, and ScanNet v2 datasets. IPFA-Net is robust to reducing the number of point clouds, with only a 3.3% decrease in accuracy under a 16-fold reduction of point number. In the part segmentation experiments, our method achieves the best segmentation performance for five objects.","PeriodicalId":50701,"journal":{"name":"Chinese Journal of Electronics","volume":"34 1","pages":"322-337"},"PeriodicalIF":1.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10892000","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143446192","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 High-Resolution Calibration Method for Time-to-Digital Converter of Lidar

IF 1.6 4区计算机科学

Chinese Journal of Electronics Pub Date : 2025-01-01 DOI: 10.23919/cje.2023.00.237

Ruqing Liu;Feng Li;Jingguo Zhu;Yan Jiang;Chenghao Jiang;Tao Hu

引用次数: 0

Secure Fine-Grained Multi-Keyword Ciphertext Search Supporting Cloud-Edge-End Collaboration in IoT

IF 1.6 4区计算机科学

Chinese Journal of Electronics Pub Date : 2025-01-01 DOI: 10.23919/cje.2023.00.244

Kaifa Zheng;Ziyu Zhou;Jianwei Liu;Beiyuan Yu

{"title":"Secure Fine-Grained Multi-Keyword Ciphertext Search Supporting Cloud-Edge-End Collaboration in IoT","authors":"Kaifa Zheng;Ziyu Zhou;Jianwei Liu;Beiyuan Yu","doi":"10.23919/cje.2023.00.244","DOIUrl":"https://doi.org/10.23919/cje.2023.00.244","url":null,"abstract":"The massive terminals access the Internet of things (IoT) through edge nodes, bringing forth new security and privacy challenges in ciphertext search and data sharing. Meanwhile, existing ciphertext search schemes often overlook lightweight computing paradigms and pay little attention to the search requirements of multiple data owners (DOs)/data users (DUs). To address these issues, we propose a secure fine-grained multi-keyword ciphertext search scheme with cloud-edge-end collaboration computing (SFMS-CC). This SFMS-CC scheme focuses on the efficiency of end users and employs a cloud-edge-end collaborative computing paradigm, effectively offloading the incremental overhead from terminals and achieving low-cost constant overhead for the first time on the DO/DU side. Furthermore, based on public-key cryptography, a ciphertext search framework supporting multi-keyword is presented systematically. Each user is assigned an exclusive search Tok to enhance the user experience. Additionally, by integrating attribute-based encryption, a multi-DOs/multi-DUs model is constructed, seamlessly embedding entity private keys and public keys into encryption, search, decryption, and other steps, ensuring high privacy and security of this scheme. Security analysis demonstrates that the SFMS-CC scheme withstands choose plaintext attack, providing privacy-preserving for outsourced data and user information. Simulation results indicate that the SFMS-CC scheme is efficient and feasible in practice.","PeriodicalId":50701,"journal":{"name":"Chinese Journal of Electronics","volume":"34 1","pages":"266-281"},"PeriodicalIF":1.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10891973","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438529","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

Ultralow Ohmic Contact in Recess-Free Ultrathin Barrier AlGaN/GaN Heterostructures Across a Wide Temperature Range

IF 1.6 4区计算机科学

Chinese Journal of Electronics Pub Date : 2025-01-01 DOI: 10.23919/cje.2023.00.309

Yuhao Wang;Sen Huang;Qimeng Jiang;Xinhua Wang;Jie Fan;Haibo Yin;Ke Wei;Yingkui Zheng;Xinyu Liu

{"title":"Ultralow Ohmic Contact in Recess-Free Ultrathin Barrier AlGaN/GaN Heterostructures Across a Wide Temperature Range","authors":"Yuhao Wang;Sen Huang;Qimeng Jiang;Xinhua Wang;Jie Fan;Haibo Yin;Ke Wei;Yingkui Zheng;Xinyu Liu","doi":"10.23919/cje.2023.00.309","DOIUrl":"https://doi.org/10.23919/cje.2023.00.309","url":null,"abstract":"“Ohmic-before-passivation” process was implemented on ultrathin-barrier AlGaN (<6>$(R_{c})$</tex>. In this process, alloyed Ti/AI/Ni/Au ohmic metal was formed first, followed by <tex>$text{AlN}/text{SiN}_{x}$</tex> passivation contributed to restore two-dimensional electron gas (2DEG) in the access region. Due to the sharp change in the concentration of 2DEG at the metal edge, a reduced transfer length consisted with lower <tex>$R_{c}$</tex> are achieved compared to that of ohmic contact on AlGaN (~20 nm)/GaN heterostructure with pre-ohmic recess process. Temperature-dependent current voltage measurements demonstrate that the carrier transport mechanism is dominated by thermionic field emission above 200 K and by field emission below 200 K. The “ohmic-before-passivation” process enables the relative stability of ohmic contacts between 50 K and 475 K and significantly improves the direct current characteristics of GaN-metal-insulator-semiconductor-high electron mobility transistor, offering a promising means for scaling down and enabling the utilization of low-voltage GaN-based power devices in extreme environmental conditions.","PeriodicalId":50701,"journal":{"name":"Chinese Journal of Electronics","volume":"34 1","pages":"137-145"},"PeriodicalIF":1.6,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10891970","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438531","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