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Communication technology and Information technology (ICCTIT), International Conference on

作者： Guopei Zeng Luping Wang School of Electronics and Communication Engineering Sun Yat-sen University Shenzhen China Zhejiang Aerospace Runbo Measurement and Control Technology Co. Ltd Zhejiang China

ISBN: (数字)9798331528973

ISBN: (纸本)9798331528980

The advent of powerful object detectors has led to the widespread adoption of the “tracking-by-detection” paradigm in multi-object tracking (MOT). However, challenges such as association errors during occlusions continue to hinder tracking performance. To address this issue, we propose three key improvements. First, we leverage the confidence scores generated by a detector with decoupled heads to weight the cost matrix. Second, we introduce a height-constrained intersection-over-union (IoU) distance metric. Finally, we classify the appearance features of objects in the current frame into two levels—high and low—based on their respective confidence scores. These features are then matched and updated against stored appearance embeddings from previous frames. Extensive comparative and ablation experiments conducted on the MOT17 dataset demonstrate that the proposed method significantly improves tracking performance in multi-object tracking scenarios.

关键词： measurement Costs Detectors communications technology Information technology

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Crustal thickness,V_(P)/V_(S) ratio,and shear wave velocity structures beneath Myanmar and their tectonic implications

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Earthquake Research Advances 2022年第1期2卷 15-21页

作者： Lay Nwe Zigen Wei Zhiwei Li Feng Bao Xuelei Li Jintao Hu State Key Laboratory of Geodesy and Earth's Dynamics Innovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan430077China Science and Technology on Reliability and Environmental Engineering Laboratory Beijing Institute of Spacecraft Environment EngineeringBeijing100094China School of Science Hunan University of Technology and BusinessChangsha410205China Department of Meteorology and Hydrology Ministry of Transport and CommunicationsMyanmar Hebei University of Engineering Handan056009China

The crustal structure in Myanmar can provide valuable information for the eastern margin of the ongoing IndoEurasian collision *** successively performed H-k stacking of the receiver function and joint inversion of the receiver function and surface wave dispersion to invert the crustal thickness(H),shear wave velocity(V_(S)),and the V_(P)/V_(S) ratio(k)beneath nine permanent seismic stations in Myanmar.H was found to increase from 26 km in the south and east of the study area to 51 km in the north and west,and the V_(P)/V_(S) ratio was complex and *** differences in the crust were observed for different tectonic *** the Indo-Burma Range,the thick crust(H~51 km)and lower velocities may be related to the accretionary wedge from the Indian *** the Central Myanmar Basin,the thin crust(H=26.9-35.5 km)and complex V_(P)/V_(S) ratio and V_(S) suggest extensional *** the Eastern Shan Plateau,the relatively thick crust and normal V_(P)/V_(S) ratio are consistent with its location along the western edge of the rigid Sunda Block.

关键词： Myanmar Crustal thickness VP/VSratio Shear wave velocity Receiver function Surface wave dispersion

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Design of User Plane in 5G Core Network Based on SDN 8

Design of User Plane in 5G Core Network Based on SDN

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8th IEEE International Conference on Network Intelligence and Digital Content, IC-NIDC 2023

作者： Wang, Ping Xu, Zhan Zhao, Ming Liu, Zhao Gong, Yi School of Automation Beijing Information Science and Technology University Beijing100192 China Beijing Information Science and Technology University Ministry of Education Key Laboratory of Modern Measurement & Control Technology Beijing100101 China Tsinghua University Beijing National Research Center for Information Science and Technology Beijing100084 China Tsinghua University Department of Electronic Engineering Beijing100084 China

ISBN: (纸本)9798350317923

With the rapid increase in demand for the fifth-generation mobile communication technology (5G) in the BusinesstoBusiness (ToB) market, future factories, especially those involving a large number of Internet of Things (IoT) devices, will prioritize deploying private networks to achieve prioritized scheduling, resource allocation, and security control over the entire network. The User Plane Function (UPF) is an important network element in the 5G core network. In practical deployments, UPF typically uses dedicated hardware devices, which are not only expensive but also have a tightly coupled architecture that imposes certain limitations on future network upgrades and scalability. To achieve flexible deployment of Network Private Network (NPN), we implemented the 5G core network architecture using Software Defined Networking (SDN) with Programming Protocol-Independent Packet Processors (P4) programmable switch. Subsequently, we conducted the connectivity test of the core network and analyzed the maximum achievable user capacity. Considering that the introduction of SDN may bring new security risks to private networks, we have designed a solution to mitigate SDN data plane Distributed Denial of Service (DDoS) attacks and have proven its effectiveness through practical experiments. © 2023 IEEE.

关键词： Network security

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Self-Supervised Multi-Transformation Learning for Time Series Anomaly Detection

SSRN

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SSRN 2023年

作者： Han, Han Han, Chuang Fan, Haoyi School of Measurement and Control Technology and Communication Engineering Harbin University of Science and Technology Harbin150080 China School of Computer and Artificial Intelligence Zhengzhou University Zhengzhou450001 China

Time series anomaly detection aims to find specific patterns in time series that do not conform to general rules, which is one of the important research directions in machine learning. However, most existing time series anomaly detection methods solely consider the original observed state space. In this paper, we investigate the different views of the original signals by reconstructing them from the different transformations to learn better comprehensive representations of normal patterns. Specifically, we propose a time series anomaly detection model based on self-supervised multi-transformation learning while jointly learning the noise and filter transformation of the normal time series and capturing the anomaly simultaneously in both transformation patterns. Firstly, the model randomly adds noise to the original signal to construct the noisy signal, and the Kalman filter is applied to the original signal to construct the filtered signal. The noisy and filtered signals are subsequently used to reconstruct the original signal, and the randomly added noise is classified. Finally, the model captures the two transformation patterns of normal time series signals and transforms the anomaly detection problem into the reconstruction metric problem of time series signals under noise and filter transformations. The effectiveness of the proposed method is verified on the UCR time series dataset. © 2023, The Authors. All rights reserved.

关键词： Time series

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Recent patents for the motorized spindle preload mechanism

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Recent Patents on Mechanical engineering 2021年第3期14卷 329-341页

作者： Dai, Ye Wen, Wan-Jian Xuan, Li-Yu Yu, Xiao-Yang Wang, Gang Key Laboratory of Advanced Manufacturing and Intelligent Technology Ministry of Education School of Mechanical and Power Engineering Harbin University of Science and Technology Harbin150080 China School of College of Measurement and Control Technology and Communication Engineering Harbin University of Science and Technolo-gy Harbin150080 China Ningbo Skync Five Axis Numerical Control Tech Co. Ltd Yuyao315400 China

Background: The motorized spindle preload technology is one of the motorized spindle key technologies, and adjusting the preload according to the working conditions can effectively improve the dynamic performance of the motorized spindle and enhance the machining accuracy. Objectives: Review the preload mechanism development, introduce various preload mechanisms, and show research status in recent years. Then to explore and predict the future development of preload technology through the analysis of the overall preload mechanism. Methods: Search for different kinds of patents and literature about spindle preload structure in recent years. Through structural research and comparison with the traditional preload mechanism, to review the structure principle of various preload mechanisms at the present stage, then shown the advantages and disadvantages of each structure. Result: According to the patents and research of the preload mechanism in recent years, classification introduced the piezoelectric ceramic preload device, electromagnetic preload device, and hydraulic preload device, and so on. Introduce their advantages and existing problems in detail, then comprehensively compare the advantages and disadvantages of various mechanisms in control and mechanism. Finally, discuss the prospects and development directions of preload technology. Conclusion: With the further development of technology, high-precision products have higher requirements for machine tools, such as low latency, low heat generation, high efficiency, and long life. People use electromagnetic force, air pressure, hydraulic pressure, and other methods, to control the magnitude of the preload, maintain the performance of the motorized spindle at a high level. Compared with the traditional quantitative preload, their applicable working conditions are more extensive and accuracy is higher. However, various new preload methods still have certain shortcomings and need further improvement. © 2021 Bentham Sci

关键词： Machine tools

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Transferable Intervalization and Midpoint De-Mixing Interval Independent Component Analysis for Industrial Fault Detection Under Data Uncertainty

SSRN

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SSRN 2024年

作者： Zhang, Shumei Wang, Sijia Dong, Feng Zhao, Chunhui Tianjin Key Laboratory of Process Measurement and Control School of Electrical and Information Engineering Tianjin University Tianjin373200 China School of Information and Intelligent Engineering Tianjin Renai College Tianjin301636 China State Key Laboratory of Industrial Control Technology College of Control Science and Engineering Zhejiang University Hangzhou310027 China

Due to noise disturbance, sensor drift, and some circumstance factors, process data are unavoidably contaminated with uncertainty, which may destroy the correlation structure of original data and make traditional process monitoring methods perform poorly. In this study, a transferable Gaussian mixture learning (TGML) method is developed to make full use of the important knowledge extracted from source domains to guide and improve the intervalization process of target domain with limited data. Then, a midpoint de-mixing interval independent component analysis (MDM-I2CA) is proposed for non-Gaussian processes with uncertainty. First, MDM-I2CA expands the traditional centering and whitening methods into interval domain to concentrate the data information on higher-order statistics. Second, a midpoint coding strategy is developed to depict the process information with the idea of focusing on the variation between intervals of a dataset, and the statistically interval independent components are further de-mixed. Finally, four monitoring statistics are constructed for fault detection. © 2024, The Authors. All rights reserved.

关键词： Fault detection

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Polar Coded OFDM with Code-Frequency Index Modulation

Polar Coded OFDM with Code-Frequency Index Modulation

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International Conference on Communication technology (ICCT)

作者： Jia-Qi Zhang Si-Yu Zhang School of Information and Communication Engineering Beijing Information Science and Technology University Beijing China Key Laboratory of Modern Measurement and Control Technology Ministry of Education Beijing Information Science and Technology University Beijing China

ISBN: (数字)9798350363760

ISBN: (纸本)9798350363777

In this paper, we introduce a polar coded orthogonal frequency division multiplexing with code-frequency index modulation (PC-CFIM) scheme, designed to enhance spectral efficiency (SE) while improving error performance. At the transmitter, PC-CFIM divides the information bits into two subsets. One subset is utilized for selecting the spreading code index, and the other is utilized for polar coded OFDM with index modulation (PC-OFDM-IM). In the proposed PC-CFIM framework, the polar-coded sequence is spread using the indices from code domain index modulation. At the receiver, the system employs code index selection coupled with polar decoding to ensure accurate retrieval of information bits. The integration of polar code with hybrid index modulation significantly improves interference resilience, thereby reducing bit error rates (BER). Moreover, the transmission of additional bits via the spreading code index further enhances the system’s SE. Simulation results show that compared to the conventional PC-OFDM-IM, the proposed PC-CFIM significantly improves the BER performance with enhanced SE.

关键词： Codes Spectral efficiency Transmitters OFDM Simulation Bit error rate Modulation Receivers Indexes Polar codes

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A long prediction horizon fcs-mpc algorithm with disturbance preview for three-phase inverters

A long prediction horizon fcs-mpc algorithm with disturbance...

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2023 Jiangsu Annual Conference on Automation, JACA 2023

作者： He, Xianghui Huang, Saijin Li, Guanjun Li, Haoyuan Wang, Xiangyu School of Automation Southeast University No. 2 Si Pai Lou Nanjing Jiangsu210096 China Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education China Jiangsu Engineering Technology Research Center for Energy Storage Conversion Application China Electric Power Research Institute Nanjing Jiangsu210003 China

ISBN: (纸本)9781839539848

This paper derives an efficient control algorithm to deal with the output voltage tracking control problem of threephase inverters with multiple disturbances (including parametric perturbations of filter, abrupt disturbances caused by load switching and harmonic disturbances brought by unbalanced loads and nonlinear loads). This accomplishment is realized through the long prediction horizon finite-control-set model predictive control (FCS-MPC) and the integration of a composite disturbance observer (CDO) and a disturbance preview model into the sphere decoding algorithm (SDA). This integration facilitates the estimation and prediction of future disturbance behaviors within the inverter system, which addresses the poor disturbance-rejection limitations inherent in conventional SDA approaches employed in previous studies. The algorithm also improves the dynamic performances of the output voltage. Simulations studies are illustrated to demonstrate the feasibility and effectiveness of the proposed control algorithm. Based on the presented results, the algorithm achieves good disturbance rejection capability and maintains small tracking error. © The Institution of engineering & technology 2023.

关键词： Disturbance rejection

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Potential Transmission Choice for Internet of Things(IoT):Wireless and Batteryless communications and Open Problems

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China communications 2021年第2期18卷 241-249页

作者： Zhan Xu Guanjie Hu Minzheng Jia Lan Dong School of Information and Communication Engineering and with Key Laboratory of Modern Measurement&Control Technology Ministry of EducationBeijing Information Science&Technology UniversityChina Beijing Key Lab of Transportation Data Analysis and Mining School of Computer and Information TechnologyBeijing Jiaotong UniversityBeijingChina Department of Information Engineering Beijing Polytechnic CollegeBeijingChina

The 5th generation mobile communications aims at connecting everything and future Internet of Things(IoT)will get everything smartly *** realize it,there exist many *** key challenge is the battery problem for small devices,such as sensors or *** backscatter,also referred to as or battery-free backscatter,is a new potential technology to address this *** early and typical type of batteryless backscatter is ambient ***,batteryless backscatter utilizes environmental wireless signals to enable battery-free devices to communicate with each *** devices first harvest energy from ambient wireless signals and then backscatter these signals so as to transmit their own *** paper reviews the current studies about batteryless backscatter,including various backscatter schemes and theoretical works,and then introduces open problems for future research.

关键词： batteryless backscatter battery-free channel state information(CSI) channel estimation multiple antennas signal detection symbiotic communication

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Flexible temperature sensors based on optimized paper/Cu/Al2O3 and graphene/PVDF composite sensing layers

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Sensors and Actuators A: Physical 2025年 391卷

作者： Zhao, Pengfei Ding, Jijun Chen, Haixia Fu, Haiwei Shaanxi Engineering Research Center of Oil and Gas Resource Optical Fiber Detection Shaanxi Key Laboratory of Measurement and Control Technology for Oil and Gas Wells School of Science Xi'an Shiyou University Xi'an710065 China

Wearable devices have great potential for development in the fields of human health detection and human-computer interaction due to its flexibility and portability. In this work, Firstly, the resistance response performance of paper/Cu/Al2O3 to temperature is optimized by changing the sputtering time of Al2O3. Combining the resistance change and stability after one month, paper/Cu/Al2O3 films with 1 min Al2O3 layer is selected. Then, temperature sensor based on optimized paper/Cu/Al2O3 and graphene/PVDF composite temperature-sensitive layers is fabricated. The sensor shows negative temperature coefficient, high temperature response and stability, which provides significant advantages in the field of temperature monitoring. The fastest response/recovery time of the sensor is 1.4 s and 10.48 s respectively, which is fast and reliable in capturing the temperature changes and thus has the capability of real-time temperature monitoring. Another outstanding feature of the sensor is its high linearity to temperature fluctuations (R2 =0.947). This feature suggests that the sensor enables real-time resistance-temperature interaction. In addition, its practical applications will be explored. The sensor can quickly sense the temperature of fingers, hot water, and working mobile phones. At the same time, the excellent performance of the sensor enables it to achieve the function of illuminating the LED. It lays the foundation for the application of temperature sensors in flexible wearable device applications. © 2025 Elsevier B.V.

关键词： Computer aided engineering

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