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2020 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2020

作者： Tang, Lei Wang, Xiaoguang Xu, Wei School of Electrical Engineering Southwest Jiaotong University Chengdu611756 China Hubei Key Lab. for High-efficiency Utiliz. of Solar Ener. and Oper. Control of Energy Storage System Hubei University of Technology Wuhan430068 China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan430074 China

ISBN: (纸本)9781728152158

Compared with direct thrust control and vector control methods, the model predictive control (MPC) is recognized as a more effective approach. However, the weighting factors in the objective function must be tuned, which greatly increases the computation burden. In this work, based on the fuzzy technique, one weighting factor optimization method is proposed to identify the suitable control action for the linear induction machine (LIM), which can effectively simplify the selection process. At last, comprehensive simulation results have demonstrated the excellent performance of the proposed method. © 2020 IEEE.

关键词： Model predictive control

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Robust Beamforming Based on Covariance Matrix Reconstruction and ADMM

Robust Beamforming Based on Covariance Matrix Reconstruction...

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2021 CIE International Conference on Radar, Radar 2021

作者： Gong, Pengcheng Wang, Zhaobin Xu, Kaiyan School of Information and Communication Engineering University of Electronic Science and Technology of China Chengdu611731 China School of Computer Science and Engineering Wuhan Institute of Technology Wuhan430205 China Hubei University of Technology Hubei Key Lab. for High-efficiency Utiliz. of Solar Ener. and Oper. Control of Energy Storage System Wuhan430068 China

ISBN: (纸本)9781665498142

Considering at the issue that the performance of the traditional beamforming algorithm will decrease sharply when the disturbance occurs at the disturbed position and the steering vector mismatch occurs, a new robust beamforming method based on covariance matrix reconstruction and Alternating Direction Method of Multipliers (ADMM) is proposed. Firstly, based on the maximum output power criterion of beamformers, an optimization model is designed to solve the optimal steering vector. Then, the covariance matrix is reconstructed by using the defined interference range to widen the nullity and enhance the anti-motion interference ability of the system. Then, for the quadratic inequality constraint problem of the steering vector, this paper uses ADMM to solve the model iteratively, and obtains the specific solution of the steering vector in each iteration. In addition, the complexity of the algorithm is also analyzed. The experimental results show that, compared with the existing beamforming algorithms, the proposed method Widen the width of zero notch in the interference area, improves the anti-interference performance of the beam, and can well correct the mismatched steering vector. © 2021 IEEE.

关键词： Alternating Direction Method of Multipliers Beamforming Covariance matrix reconstruction Null widening Quadratic constraint

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Research on the Application of Computer Big data Technology in the Health Monitoring of the Bridge Body of Cross-river Bridge

Research on the Application of Computer Big Data Technology ...

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2022 IEEE Asia-Pacific Conference on Image Processing, Electronics and Computers, IPEC 2022

作者： Yang, Di Wang, Lianfa Zhang, Yufeng Jsti Group Nanjing211000 China State Key Laboratory of Safety and Health for In-Service Long Span Bridge Nanjing210012 China Key Lab. of Large Span Bridge Health Inspection Diagnosis Technology Ministry of Communications Nanjing210012 China Ctr. of Data Measured by Struct. Health Monitoring System of Long-Span Bridge in Province of Jiangsu Nanjing210012 China

ISBN: (纸本)9781665409025

This article proposes a health monitoring system platform for cross-river bridges based on big data. The system can realize regionalized bridge operation and maintenance management. The system has functions such as registration modification and deletion of sensor equipment, user registration modification and deletion, real-time display and storage of sensor monitoring data, and evaluation and early warning of bridge structure safety. The sensor is connected to the lower computer through the serial port, analog signal, fiber grating signal, etc. The lower computer converts a variety of signals into digital signals through the single-chip A/D sampling and demodulator, etc., and transmits it to the upper computer through the serial port. The upper computer uses ARMCortex-A9 Run the main program to realize multi-threaded network communication. The system platform is to test the validity of the model, and a variety of model verification methods are used for evaluation to ensure the reliability of the big data analysis method. © 2022 IEEE.

关键词： Big data

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Ablation characteristics of hybrid target materials for laser triggered vacuum switches

Ablation characteristics of hybrid target materials for lase...

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International Conference on Mechanical, Electric and Industrial Engineering, MEIE 2018

作者： Hui, Chen State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan Hubei430074 China Hubei Collaborative Innovation Center for High-efficiency Utilization of Solar Energy Hubei University of Technology Wuhan430068 China Hubei Key Lab. for High-efficiency Utiliz. of Solar Ener. and Oper. Control of Energy Storage System Hubei University of Technology Wuhan430068 China

The key difference of laser triggered vacuum switch (LTVS) and electrical triggered vacuum switch (ETVS) is the different triggered way, because the initial plasmas were generated by laser irradiation target material of LTVS, which generates different impact on the triggered characteristics of LTVS with different target materials. There are three laser wavelength (1064nm, 532nm and 266nm) which are tested the triggered characteristics of target materials, with decreased conduction time delay under the condition of increasing laser energy. © Published under licence by IOP Publishing Ltd.

关键词： Hybrid materials

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Intersecting-boundary-sensitive fingerprinting for tampering detection of DNN models 24

Intersecting-boundary-sensitive fingerprinting for tampering...

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Proceedings of the 41st International Conference on Machine Learning

作者： Xiaofan Bai Chaoxiang He Xiaojing Ma Bin Benjamin Zhu Hai Jin School of Cyber Science and Engineering Huazhong University of Science and Technology National Engineering Research Center for Big Data Technology and System and Services Computing Technology and System Lab and Hubei Engineering Research Center on Big Data Security and Hubei Key Laboratory of Distributed System Security Microsoft School of Computer Science and Technology Huazhong University of Science and Technology and National Engineering Research Center for Big Data Technology and System and Services Computing Technology and System Lab and Cluster and Grid Computing Lab.

Cloud-based AI services offer numerous benefits but also introduce vulnerabilities, allowing for tampering with deployed DNN models, ranging from injecting malicious behaviors to reducing computing resources. Fingerprint samples are generated to query models to detect such tampering. In this paper, we present Intersecting-Boundary-Sensitive Fingerprinting (IBSF), a novel method for black-box integrity verification of DNN models using only top-1 lab.ls. Recognizing that tampering with a model alters its decision boundary, IBSF crafts fingerprint samples from normal samples by maximizing the partial Shannon entropy of a selected subset of categories to position the fingerprint samples near decision boundaries where the categories in the subset intersect. These fingerprint samples are almost indistinguishable from their source samples. We theoretically establish and confirm experimentally that these fingerprint samples' expected sensitivity to tampering increases with the cardinality of the subset. Extensive evaluation demonstrates that IBSF surpasses existing state-of-the-art fingerprinting methods, particularly with larger subset cardinality, establishing its state-of-the-art performance in black-box tampering detection using only top-1 lab.ls. The IBSF code is availab.e at: https://***/CGCL-codes/IBSF.

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Research on optimization of emergency rescue plan based on risk measurement 3

Research on optimization of emergency rescue plan based on r...

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2023 3rd International Conference on Big data, Artificial Intelligence and Risk Management, ICBAR 2023

作者： Bu, Fanbiao Chen, Xuhao Lv, Ying Xu, Hengrui Overall Demonstration Center Qian Xuesen Institute of Military Systems Engineering Beijing100024 China Key Lab. of Transport Industry of Big Data Application Technologies for Comprehensive Transport Ministry of Transport Institute of Transportation System Science and Engineering School of Traffic and Transportation Beijing100044 China Shijiazhuang Land and Space Planning and Design Institute Co. Ltd. Hebei Shijiazhuang050019 China Data Center Agricultural Bank of China Limited Beijing100024 China

ISBN: (纸本)9798400716478

In order to reduce the impact of emergencies, this paper takes emergencies in complex geological environment as the background to study the optimization problem of emergency rescue routes. We measure the casualty consequences caused by the delay of rescue time based on conditional value at risk, and adopt multiple modes of transportation to coordinate rescue. A bi-objective optimization model is established with the total risk and total cost as the objectives, then the constraint method is applied to transform the model into a single objective optimization model for solution. Finally, an example is designed to analyze the relationship between the total risk and the total cost, and the rescue path scheme under the condition that the demand information is determined. The results indicate that the established model can provide a reference basis for emergency rescue of emergencies in the process of major Transportation engineering construction. © 2023 ACM.

关键词： Optimization

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Collosion detection research based on capsule bounding volume

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Journal of Computational Information systems 2014年第7期10卷 2743-2750页

作者： Kong, Dehan Liu, Yongshan Cui, Na Department of Information Science and Engineering Yanshan University Qinhuangdao 066004 China The Key Laboratory for Computer Virtual Technology and System Integration of Hebei Province Qinhuangdao 066004 China The Data Industry Research Lab. Qinhuangdao 066004 China

A collision detection algorithm based on capsule bounding volume (CBV for short) is presented improve the efficiency of Collision detection in three-dimensional scene. This algorithm use CBV to encircle roles and achieve collision detection between the virtual characters and static objects and dynamic objects in the scene. It includes collision detection between CBV and AABB, triangular and capsule. Theoretical analysis and experimental results show that this algorithm can improve real time for collision detection. © 2014 Binary Information Press.

关键词： Information systems

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Research on load balancing strategy based on middleware

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ICIC Express Letters 2014年第9期8卷 2655-2661页

作者： Gu, Xiaoying Liu, Yongshan Man, Yubao Department of Information Science and Engineering Qinhuangdao 066004 China The Key Lab. for Computer Virtual Tech. and System Integration of Hebei Province Yanshan University No. 438 Hebei Ave Qinhuangdao 066004 China Data Industry Research Lab Qinhuangdao 066004 China

According to the former research achievements about load balancing strategy, considering the load distribution, the load condition of service node and the number of user connections, we propose a load balancing strategy based on middleware. According to the cluster service load and the number of user connections, the requests from user will be reasonably allocated to each service node by using middleware technology, then service node and requested user establish a temporary connection, after all the requests of this user are processed by this node. Experiments show that, this strategy reduces the number of requests for allocation, improves the resource utilization rate of cluster system and load balancing degree, and effectively suppresses the load jitter of system. © 2014 ISSN 1881-803X.

关键词： Middleware

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Influence of Electrical Tree Aging on the Dielectric and Trap Properties of XLPE Insulation 4

Influence of Electrical Tree Aging on the Dielectric and Tra...

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4th IEEE China International Electrical and Energy Conference, CIEEC 2021

作者： Xie, Kun Ren, Chengyan Lin, Tiandi Zhang, Cheng Zhang, Wei Hu, Libin Chen, Jie Hubei University of Technology Hubei Key Lab. for High-Efficiency Utiliz. of Solar Ener. and Oper. Control of Energy Storage System Wuhan China Chinese Academy of Sciences Beijing International St Cooperation Base for Plasma Science and Energy Conversion Institute of Electrical Engineering Beijing China State Grid Jiangsu Electric Power Co. Ltd. Research Institute Nanjing China

ISBN: (纸本)9781728171494

The dielectric and charge properties of XLPE insulation with different service periods are important to estimate the aging state of high voltage cables. The accelerated aging experiment was carried out to obtain the aged XLPE samples with the needle-plate electrodes using power frequency AC source. The surface composition and dielectric parameters of XLPE samples were measured and analyzed with the Fourier Transform Infrared Spectroscopy (FTIR) and impedance analyzer. The surface potential and trap distribution of XLPE samples were measured by the isothermal surface potential decay (ISPD) method. The tested objects include the new XLPE sample, the samples with different electrical tree lengths, and the one with electrical tree breakdown. The results show that the aging of the electrical tree changes the dielectric parameters and trap distribution of XLPE samples. The dielectric constant increases with the length of electrical tree. The deeper and shallower traps appear simultaneously in the surface layer of XLPE insulation after electrical tree aging, and the trap density increases with the length of electrical tree. The trap energy level is the lowest and the trap density is the largest in the sample with electrical tree breakdown. The FTIR result shows that the absorption peaks of XLPE backbone structure decline obviously after electrical tree aging. The fracture of molecular chain and formation of low density area in XLPE sample are the main reasons for the change of dielectric and trap after electrical tree aging. © 2021 IEEE.

关键词： Fourier transform infrared spectroscopy

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A load balancing algorithm for multi-root ONS

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Journal of Computational Information systems 2014年第7期10卷 2735-2742页

作者： Hao, Fengzhai Liu, Yongshan Chen, Wei College of Information Science and Engineering Yanshan University Qinhuangdao 066004 China The Key Laboratory for Computer Virtual Technology and System Integration of Hebei Province Yanshan University Qinhuangdao 066004 China Data Industry Research Lab. Qinhuangdao 066004 China

In order to solve the overload problem of root ONS in the EPC network, a load balancing algorithm based on multi-root ONS is proposed. Based on the proposed load balancing ONS (LB ONS) architecture, the ONS Root is defined to have two states, idle or busy. According to CPU utilization and memory utilization of the ONS Root and in combination with threshold controlling to periodically update the ONS Root states, which makes the requests coming from client applications be transferred to an ONS Root which is idle. Experiment results show that the algorithm can reduce query hops and query delays effectively and offer lookup service efficiently. © 2014 Binary Information Press.

关键词： Internet of things

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