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16th IEEE International Conference on Electronic Measurement and Instruments, ICEMI 2023

作者： Chen, Jiahe Di, Lingsong Chengdu University of Technology School of Nuclear Technology and Automation Engineering Sichuan Chengdu China Unit 94259 Shandong Yantai China

ISBN: (纸本)9798350327144

In order to monitor the vibration of environmental parameters during equipment transportation and storage, a real-time monitoring environmental vibration parameters acquisition system is designed. The system adopts the structural design of separation of sensor and main equipment, and supports the collection and storage of up to 8 three-axis vibration data at the same time, so as to realize the monitoring, recording, and analysis of environmental vibration status. Through the shaker test and the field test of large vessels, it is verified that the system can monitor the vibration component of the three axes in the environment in real-time, and the equipment can operate stably and reliably and has the advantages of high real-time performance and high sensitivity. © 2023 IEEE.

关键词： Structural design

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Search for Double Beta Decay of 136Xe to the 0+1 Excited State of 136Ba with PandaX-4T

arXiv

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arXiv 2025年

作者： Luo, Lingyin Bo, Zihao Chen, Wei Chen, Xun Chen, Yunhua Cheng, Zhaokan Cui, Xiangyi Fan, Yingjie Fang, Deqing Gao, Zhixing Geng, Lisheng Giboni, Karl Guo, Xunan Guo, Xuyuan Guo, Zichao Han, Chencheng Han, Ke He, Changda He, Jinrong Huang, Di Huang, Houqi Huang, Junting Hou, Ruquan Hou, Yu Ji, Xiangdong Ji, Xiangpan Ju, Yonglin Li, Chenxiang Li, Tao Li, Jiafu Li, Mingchuan Li, Shuaijie Li, Zhiyuan Lin, Qing Liu, Jianglai Lu, Congcong Lu, Xiaoying Luo, Yunyang Ma, Wenbo Ma, Yugang Mao, Yajun Meng, Yue Ning, Xuyang Pang, Binyu Qi, Ningchun Qian, Zhicheng Ren, Xiangxiang Shan, Dong Shang, Xiaofeng Shao, Xiyuan Shen, Guofang Shen, Manbin Sun, Wenliang Tao, Yi Wang, Anqing Wang, Guanbo Wang, Hao Wang, Jiamin Wang, Lei Wang, Meng Wang, Qiuhong Wang, Shaobo Wang, Siguang Wang, Wei Wang, Xiuli Wang, Xu Wang, Zhou Wei, Yuehuan Wu, Weihao Wu, Yuan Xiao, Mengjiao Xiao, Xiang Xiong, Kaizhi Xu, Yifan Yao, Shunyu Yan, Binbin Yan, Xiyu Yang, Yong Ye, Peihua Yu, Chunxu Yuan, Ying Yuan, Zhe Yun, Youhui Zeng, Xinning Zhang, Minzhen Zhang, Peng Zhang, Shibo Zhang, Shu Zhang, Tao Zhang, Wei Zhang, Yang Zhang, Yingxin Zhang, Yuanyuan Zhao, Li Zhou, Jifang Zhou, Jiaxu Zhou, Ning Zhou, Xiaopeng Zhou, Yubo Zhou, Zhizhen New Cornerstone Science Laboratory Tsung-Dao Lee Institute Shanghai Jiao Tong University Shanghai201210 China State Key Laboratory of Nuclear Physics and Technology School of Physics Peking University Beijing100871 China Shanghai Key Laboratory for Particle Physics and Cosmology Shanghai200240 China Jinping Deep Underground Frontier Science and Dark Matter Key Laboratory of Sichuan Province China Yalong River Hydropower Development Company Ltd. 288 Shuanglin Road Chengdu610051 China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen University Zhuhai519082 China Department of Physics Yantai University Yantai264005 China Institute of Modern Physics Fudan University Shanghai200433 China School of Physics Beihang University Beijing102206 China Peng Huanwu Collaborative Center for Research and Education Beihang University Beijing100191 China International Research Center for Nuclei and Particles in the Cosmos Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang University Beijing100191 China Institute of Modern Physics Chinese Academy of Sciences Huizhou516000 China SJTU Paris Elite Institute of Technology Shanghai Jiao Tong University Shanghai200240 China Shanghai Jiao Tong University Sichuan Research Institute Chengdu610213 China School of Mechanical Engineering Shanghai Jiao Tong University Shanghai200240 China Department of Physics University of Maryland College ParkMD20742 United States School of Physics Nankai University Tianjin300071 China School of Physics Sun Yat-Sen University Guangzhou510275 China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of China Hefei230026 China Department of Modern Physics University of Science and Technology of China Hefei230026 China Research Center for Particle Science and Technology Institute of Frontier and Interdisciplinary Science Shandong University Shandong Qingdao266237 China Key Laboratory o

We perform a search of double beta decay of 136Xe to the excited state, 0+1 , of 136Ba (2νββ-0+1 ), using the dual-phase xenon detector of PandaX-4T with the first 94.9-day commissioning data. The multi-site events are reconstructed up to the MeV energy scale, which helps to improve the background model significantly. The background contribution from the stainless steel platform outside PandaX-4T cryostat is evaluated for the first time. No significant evidence for 2νββ-0+1 is observed, resulting in a lower limit on half-life of 7.5×1022 yr at the 90% confidence level. This is the first experimental limit on such a rare decay in a natural xenon-based detector. © 2025, CC BY.

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Effect of contact materials on the transient characteristics of vacuum arc plasma and anode erosion

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Plasma Science and technology 2024年第11期26卷 170-180页

作者： Ze YANG Dongsheng CAI Qi HUANG Lijun WANG College of Nuclear Technology and Automation Engineering Chengdu University of TechnologyChengdu 610059People’s Republic of China Postdoctoral Mobile Station in Nuclear Science and Technology Chengdu University of TechnologyChengdu 610059People’s Republic of China School of Information Engineering Southwest University of Science and TechnologyMianyang 621010People’s Republic of China State Key Laboratory of Electrical Insulation and Power Equipment Xi’an Jiaotong UniversityXi’an 710049People’s Republic of China

In this study, the mechanisms of the anode phenomena and anode erosion with various contact materials were investigated. Arc parameters were calculated, and the anode temperature was predicted with a transient self-consistent model. The simulation results predicted a constricted arc column and obvious anode phenomena in Cu–Cr alloy contacts than in W–Cu alloy *** observation could be the reason for the concentrated anode erosion in Cu–Cr alloys. For the contacts made by pure tungsten(W) and W–Cu alloy, the anode temperature increased rapidly because of the low specific heat of W. However, the maximum energy flux from the arc column to the anode surface was lower than in other cases. The simulation results were compared with experimental results.

关键词： vacuum arc MHD model anode erosion contact materials

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Dynamic ageing research of cross‐linked polyethylene cable insulation based on temporal‐spatial dimension under combined electro‐thermal effect

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High Voltage 2023年第5期8卷 1067-1081页

作者： Yifeng Zhao Yue Xie Yu Zhao Jiasheng Huang Xinghui Fan Yangyang Nie Gang Liu School of Electric Power Engineering South China University of TechnologyGuangzhouChina School of Automation Guangdong Polytechnic Normal UniversityGuangzhouChina State Key Laboratory of Nuclear Power Safety Monitoring Technology and Equipment ShenzhenChina Transmission Management Office Guangzhou Power Supply BureauGuangzhouChina

Dynamic ageing process of cross‐linked polyethylene(XLPE)cable insulation under combined electro‐thermal effect is investigated by the construction of theoretical analysis model and the practice of operation‐simulated ageing ***,theoretical analysis model is constructed from time and spatial *** the time dimension,in the light of the impeding trend of internal stress to external stress,the XLPE ageing process of Steady state‐Transition state‐Steady state(STS)is proposed to illustrate the dynamic ageing process of *** the spatial dimension,the insulation is divided into three scales to quantify the ***,to practice the theoretical analysis model,an operation‐simulated ageing test was conducted on two high voltage alternating current cables with service years of 15 and 30 for 540 ***,relevant diagnostic measurements were applied to analyse the influence of physicochemical characteristics on the dielectric and heat transfer performances of the *** results show that the degradation of the actual operating cable is an extremely slow *** the one hand,the response in physical changes of morphology counterbalances the external stress,maintaining the *** the other hand,once the chemical changes occur,negative feedback mechanism tends to impede the occurrence of further degradation by regulating fields distribution.

关键词： dimension insulation effect

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Location Selection and Scheduling Optimization of Material Storage in Manufacturing Workshop

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International Journal of Plant engineering and Management 2019年第4期24卷 206-218页

作者： ZENG Guoqiang LIU Li SHENG Lei BAI Nan School of Nuclear Technology and Automation Engineering Chengdu University of Technology

Based on improved immune algorithm, the location of material storage in manufacturing workshop is studied. Intelligent optimization algorithms include particle swarm optimization algorithm, genetic selection algorithm, simulated annealing algorithm, tabu search algorithm and so on. According to the non-linear constraints, the objective function is established to solve the minimum energy consumption of material distribution. The improved immune algorithm can solve the complex problem of manufacturing workshop, and the material storage location and scheduling scheme can be obtained by combining simulation software. Scheduling optimization involves material warehousing, sorting, loading and unloading, handling and so on. Using the one-to-one accurate distribution principle and MATLAB software to simulate and analyze, the location of material warehousing in manufacturing workshop is determined, and the material distribution and scheduling are studied.

关键词： immune algorithm manufacturing workshop material storage location MATLAB scheduling optimization

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Fault prediction method for nuclear power machinery based on Bayesian PPCA recurrent neural network model

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nuclear Science and Techniques 2020年第8期31卷 13-23页

作者： Jun Ling Gao-Jun Liu Jia-Liang Li Xiao-Cheng Shen Dong-Dong You State Key Laboratory of Nuclear Power Safety Monitoring Technology and Equipment China Nuclear Power Engineering Company Ltd.Shenzhen 518172China School of Mechanical and Automotive Engineering South China University of TechnologyGuangzhou 510640China Department of Automation Shanghai Jiao Tong University800 Dongchuan RoadShanghai 200240China

Early fault warning for nuclear power machinery is conducive to timely troubleshooting and reductions in safety risks and unnecessary costs. This paper presents a novel intelligent fault prediction method, integrated probabilistic principal component analysis(PPCA), multi-resolution wavelet analysis, Bayesian inference, and RNN model for nuclear power machinery that consider data uncertainty and chaotic time series. After denoising the source data, the Bayesian PPCA method is employed for dimensional reduction to obtain a refined data group. A recurrent neural network(RNN) prediction model is constructed, and a Bayesian statistical inference approach is developed to quantitatively assess the prediction reliability of the model. By modeling and analyzing the data collected on the steam turbine and components of a nuclear power plant, the results of the goodness of fit, mean square error distribution, and Bayesian confidence indicate that the proposed RNN model can implement early warning in the fault creep period. The accuracy and reliability of the proposed model are quantitatively verified.

关键词： Fault prediction nuclear power machinery Steam turbine Recurrent neural network Probabilistic principal component analysis Bayesian confidence

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Characteristics of sub-synchronous oscillation in grid-connected wind farm system

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Journal of Electronic Science and technology 2023年第4期21卷 91-101页

作者： Yan Gong Qi Huang Dong-Sheng Cai Bamisile Olusola Olorunfemi School of Mechanical and Electrical Engineering University of Electronic Science and Technology of ChinaChengdu611731China Southwest University of Science and Technology Mianyang621010China The College of Nuclear Technology and Automation Engineering Chengdu University of TechnologyChengdu610059China

With the rapid development of wind power, wind turbines are accompanied by a large quantity of power electronic converters connected to the grid, causing changes in the characteristics of the power system and leading to increasingly serious sub-synchronous oscillation (SSO) problems, which urgently require the generalized classification and characterization of the emerging oscillation problems. This paper classifies and characterizes the emerging types of SSO caused by grid-connected wind turbines to address these issues. Finally, the impact of the typical system parameters changes on the oscillation pattern is analyzed in depth to provide effective support for the subsequent suppression and prevention of SSO.

关键词： Characteristics Classification Sub-synchronous oscillation(SSO) Typical system parameters Wind farm

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Low Complexity Joint Power and Bandwidth Allocation for 3D Video SoftCast 4

Low Complexity Joint Power and Bandwidth Allocation for 3D V...

引用

4th International Conference on Computer Communication and the Internet, ICCCI 2022

作者： Thabet, Saqr Khalil Saeed Osei-Mensah, Emmanuel Hassan, Jamal N.A. Bamisile, Olusola University of Electronic Science and Technology of China School of Information and Communication Engineering Chengdu China Chengdu University of Technology College of Nuclear Technology and Automation Engineering Chengdu China

ISBN: (数字)9781665469920

ISBN: (纸本)9781665469920

SoftCast transmission achieves a linear video quality transition commensurate with the wireless channel conditions, allowing it to avoid the cliff effect, unlike the digital video transmission system. When adopting SoftCast for three-dimensional video transmission, several issues arise. 1) Optimally allocate the power budget to texture and depth to minimize transmission distortion. 2) Select the appropriate number of texture and depth chunks to meet the bandwidth constraints. 3) Reduce the 3D video computation complexity. This paper aims to optimally solve the joint power and bandwidth allocation with low complexity. We derive a closed-form based on the power-distortion optimization problem to estimate the optimal power allocation ratio between the texture and depth map. Then to adapt to the bandwidth constraints. We first set the available bandwidth to be shared equally between texture and depth, this joint bandwidth allocation technique reduces the complexity, and to improve the overall 3D video quality, the joint power allocation is estimated at different bandwidth constraints. With low complexity, the proposed method achieves a graceful video quality transition with the improvement of channel conditions under bandwidth constraints and better performance than its counterpart default fixed-ratio power allocation between texture and depth. © 2022 IEEE.

关键词： Bandwidth

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Flow-induced Vibration of Two Tandem Oscillating Square Cylinders in Reattachment Regime 1

Flow-induced Vibration of Two Tandem Oscillating Square Cyli...

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1st International Conference on Applied Physics and Mathematics, ICAPM 2023

作者： Wang, Jun Mahbub, Alam Md Chen, Qing Lin, Yiwen Nuclear Power Institute of China 610213 China School of Mechanical Engineering and Automation Harbin institute of Technology Shenzhen China

To improve our understanding of structural stability, two vibrating tandem square cylinders is numerically investigated in the present study. In reattachment regime (L* = 2), mass ratios (m* = 3), Reynolds numbers (Re = 100) are considered. Different branches are identified. For the first cylinder, the maximum A* is about 0.10, which is one-third of a single cylinder. For the second cylinder, the maximum A* is about 0.42, which is 1.45 times of a single cylinder. Wake mode is observed, and the existence of the second cylinder restrains the vortex shedding from the first cylinder. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Reynolds number

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Globalized probability based lane detection with nonunique B-spline model

Globalized probability based lane detection with nonunique B...

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2nd International Conference on Multimedia technology, ICMT 2011

作者： Li, Xiangyang Fang, Xiangzhong Tuo, Xianguo School of Electronic Information and Electrical Engineering Shanghai Jiaotong University Shanghai China College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu China

ISBN: (纸本)9781612847740

In this paper, we proposed a robust lane detection method. This method uses the globalized probability of boundary (gPb) algorithm as boundary detector and nonunique B-spline (NUBS) as the road model. The gPb algorithm combines the local information, like brightness, color and texture features, with global information derived from spectral partitioning and is robust against shadow, and illumination varying in road boundaries detection. NUBS model is flexible enough to model the most of roads, include highways and rural ways, while taking account of the perspective effect. This method contains three main steps: first, we use gPb to detect the boundaries of the objects in the resized captured images, and then, take use of the parallel property of the road boundaries in ground images to find the knot sets of NUBS model for two sides of the road boundaries. Finally, we make the knots as initial boundaries and push them to the more accuracy boundaries in the canny edge map image using the snake algorithm. © 2011 IEEE.

关键词： Image segmentation

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