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7th IEEE International Conference on Electronic Information and Communication technology, ICEICT 2024

作者： Wang, Maoyuan Zhang, Senyu Liu, Jun Li, Zhe Jiang, Haoxuan Luo, Xiaoliang Ji, Zhe Wen, Guangjun Huang, Yongjun University of Electronic Science and Technology of China School of Information and Communication Engineering Chengdu China University of Electronic Science and Technology of China School of Automation Engineering Chengdu China Glasgow College UESTC University of Electronic Science and Technology of China Chengdu China National Innovation Institute of Defense Technology Academy of Military Science PLA Beijing China Shijiazhuang Tiedao University School of Mechanical Engineering Shijiazhuang China

ISBN: (纸本)9798350384437

Micro-hemispherical resonator gyroscope (micro-HRG) is one of the most precise micro-vibratory gyroscopes. However, traditional micro-hemispherical resonator gyroscope has complex processing and weak anti-electromagnetic ability. Micro-HRGs based on optomechanical drive the resonator cavity and detect angular velocity/vibrations through optomechanical interactions, offering advantages such as ultra-high precision and ease of control. This paper investigates the driving and detection mechanisms of angular velocity and vibrations in micro-HRGs based on cavity optomechanics and Whispering Gallery Mode (WGM), as well as their structural design methods. It includes simulation analyses of performance in optical modes and mechanical modes. In terms of optical modes, the paper discusses and analyzes the influence of the length and thickness of the outer edge of the resonator on the optical resonance frequency and the optical quality factor;in terms of mechanical modes, it discusses and analyzes the influence of the radius and length of the support column on the mechanical resonance frequency. © 2024 IEEE.

关键词： Whispering gallery modes

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Non-intrusive Load Monitoring for Household Energy Disaggregation: A State-of-the-Art 6

Non-intrusive Load Monitoring for Household Energy Disaggreg...

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6th IEEE Conference on Energy Internet and Energy System Integration, EI2 2022

作者： Ramadan, R. Huang, Qi Bamisile, Olusola School of Mechanical and Electrical Engineering Chengdu611731 China Tanta University Electrical Power and Machines Engineering Department Tanta31511 Egypt Chengdu University of Technology College of Nuclear Technology and Automation Engineering Chengdu610059 China

ISBN: (纸本)9798350347159

The continual rise in energy consumption has become a significant issue for power systems. Hence it is important to promote energy saving and reduce consumption for solving this problem. Also, finding solutions to enhance energy efficiency is crucial due to the increase in global energy demand. To improve the effectiveness of a power system network, it is important to monitor, manage, and regulate electrical energy needs on a real-time consumption basis. The development of smart homes includes energy management as a key component. A reliable appliance load monitoring (ALM) system is important for the smart energy management framework. ALM's objectives include achieving comprehensive energy sensing and disseminating data on energy use. This will make it possible for automated energy management systems to identify appliances that use higher energy. Thereby enabling them to implement energy saving methods such as rescheduling the high power demand to off-peak hours. Non-intrusive load monitoring (NILM) is one of the most popular energy management strategies in recent years. It enables customers and industries to effectively control their energy use. Utilizing a single energy meter, the NILM technology has gained popularity as an emerging method for tracking events (on/off) and energy use of electrical services and appliances in buildings. Consumers might better understand their appliance behaviour and take the appropriate actions to reduce energy consumption with the aid of information on energy consumption at the appliance level. Hence, the main objective of this paper is to present a comprehensive review of energy management monitoring approaches with an emphasis on non-intrusive load monitoring. © 2022 IEEE.

关键词： Energy efficiency

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Simulation study of turbulent mixing characteristics of tight lattice with triangular arrangement under blockage condition 5

Simulation study of turbulent mixing characteristics of tigh...

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2021 5th International Conference on Fluid Mechanics and Industrial Applications, FMIA 2021

作者： Li, Yunxiang Luo, Dongmei Yang, Xinyu Zhang, Chuyun College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu610000 China

The study of turbulent mixing in the gaps of fluid sub-channels in the tight lattice under blockage conditions is of great significance to the prediction of the thermal-hydraulic behavior of fuel assemblies under accident conditions. The CFD method was used to simulate the fluid flow phenomenon in the blockage condition in the tight lattice, and the velocity field and the turbulent mixing coefficient distribution in the section and downstream of the blockage under different blockage conditions were further compared and analyzed. The analysis results show that the blockage mainly affects the flow field of the sub-channel where it is located and the adjacent sub-channels. The turbulent mixing coefficient in these channels will increase significantly;when the sub-channel blockage rate is small, the turbulent mixing coefficient downstream of the blockage will be reduced;the short length will make the flow field near the top of blockage segment more complicated. The obtained changes of transverse and axial turbulent mixing coefficients under different blockage conditions can provide a reference for the parameter setting of the sub-channel analysis program. © Published under licence by IOP Publishing Ltd.

关键词： Flow fields

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Study on Background Subtraction of X-ray Spectrum by Improved Fourier Transform Based on Adaptive Threshold Judgment 3

Study on Background Subtraction of X-ray Spectrum by Improve...

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3rd IEEE Eurasia Conference on IOT, Communication and engineering, ECICE 2021

作者： Cao, Hong Ge, Liangquan Gu, Yi Li, Fei Gu, Zhixing Chengdu University of Technology College of Nuclear Technology and Automation Engineering Chengdu610059 China

ISBN: (纸本)9781665445160

In the field of nuclear analysis, background superposition affects the accuracy of qualitative and quantitative analysis. The research on background deduction of X-ray spectrum has always been an important step to optimize the spectral line data. Fourier transform [6] is one of the important methods of background deduction, but the threshold judgment of background deduction is involved in the calculation process, which needs to be calculated separately and the steps are cumbersome. Therefore, an adaptive hierarchical threshold judgment method based on a neural network model is proposed. Firstly, the data of experimental spectrum are regularized and preprocessed, data with low sparse characteristics are screened, seven obvious characteristic peaks are optimized, and 809 data with small weight are screened, and the accuracy is relatively improved by 79.00%. After preprocessing, the neural network model adaptive layered breakpoint algorithm [1] is used to judge the threshold. Finally, the iterative Fourier transform method is used to deduct the background of the X-ray spectrum, and the stability of the model is studied. It is concluded that the model can accurately deduct the spectral background of X-ray, and has strong stability and accuracy under the allowable error. © 2021 IEEE.

关键词： Neural network models

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Event-Triggered Control for Human-in-the-Loop Multi-agent Systems under DoS Attacks 14

Event-Triggered Control for Human-in-the-Loop Multi-agent Sy...

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14th International Conference on Information Science and technology, ICIST 2024

作者： Xu, Yuanyuan Liu, Kai Liang, Hongjing Li, Tieshan Long, Yue Liu, Qidong Yang, Ximing Hang, Zongsheng School of Automation Engineering University of Electronic Science and Technology of China Chengdu China The College of Engineering China University of Petroleum-Beijing at Karamay Karamay China College of Engineering China University of Petroleum-Beijing at Karamay Karamay China

ISBN: (纸本)9798350353334

This paper introduces an event-triggered secure control scheme for human-in-the-loop multi-agent systems in the context of DoS attacks. The integration of human intelligence and decision-making significantly enhances system security, as a human provides command signals to a non-autonomous leader agent. To determine unknown states, an adaptive neural state observer utilizes neural networks to approximate nonlinear functions, while a relative threshold-based event-triggered con-trol strategy is introduced to optimize communication resource usage. At the same time, a predictor is developed to monitor potential compromises in the edges of the multi-agent network to counteract attacks. Using Lyapunov analysis, it is shown that the proposed secure control protocol is capable of maintaining bounded closed-loop signals despite the occurrence of attacks. Finally, the effectiveness of the proposed scheme is validated by the simulation results. © 2024 IEEE.

关键词： Multi agent systems

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Development of the High Voltage DC Power Supply for X-ray Tube 3

Development of the High Voltage DC Power Supply for X-ray Tu...

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3rd IEEE Eurasia Conference on IOT, Communication and engineering, ECICE 2021

作者： Pu, Yongfan Wei, Xubo Liu, Zhao Chengdu University of Technology The College of Nuclear Technology and Automation Engineering Chengdu610059 China

ISBN: (纸本)9781665445160

A 350 kV/20 mA high voltage DC power supply for X-ray tube is designed to use as a control circuit with Digital Signal Processor (DSP). The power use the 380 V/50 Hz three-phase electric as input signal, and output high voltage via rectifier filter, full bridge inverter, transformer booster and voltage doubling rectifier. The inverter circuit implements voltage adjustment by generating SPWM of different duty ratios in DSP. The Maxwell software is employed to calculate the distribution of the electric field as designing the transformer, and the maximum field strength is 78.521 kV/mm in winding. It is available to design the layer insulation of transformer windowing with the polyimide film in accordance with the electric field. Voltage doubling rectifier circuit uses C-W positive and negative two-way voltage doubling rectifier circuit which is a wide application in X-ray Optical Source. The numerical simulation indicates that the overall design of power is legitimate and the parameters can reach the expected requirements. © 2021 IEEE.

关键词： Digital signal processing

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Research on Displacement Measurement Device Dropped with UAV to Apply to Monitoring Geologic Hazard near Pylons in Sichuan-Chongqing Aera 2

Research on Displacement Measurement Device Dropped with UAV...

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2nd International Conference on Computational Modeling, Simulation and Data Analysis, CMSDA 2022

作者： Yu, Jiahao Sun, Wencheng Qin, Zhangjian Chengdu University of Technology Nuclear Technology and Automation Engineering Chengdu610059 China Southwest Branch of State Grid Corporation of China Chengdu610059 China

ISBN: (纸本)9798350345759

It is necessary to monitor geologic hazard near pylons in Sichuan-Chongqing aera by means of displacement measurement. A Displacement Measurement Device (DMD) dropped with Unmanned Aerial Vehicle (UAV) should be designed and implemented because it is very difficult to mount the device on the steep mountain. Difference position technology applys in the DMD based on the Beidou satellite navigation system. The appearance of DMD is regular tetrahedral which is very stable when the device lands on either side dropped with UAV. The antennas of the DMD are placed in a sphere which always face the satellite because the spherical structure like a roly-poly toy standing still. The DMDs are mounted on the H08 landslide and H10 landslide, which are potential landslide near pylons in Sichuan-Chongqing aera. The DMDs are dropped with UAV and now are running stably. © 2022 IEEE.

关键词： Landslides

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Variance-Constrained Filtering Fusion for Nonlinear Cyber-Physical Systems With the Denial-of-Service Attacks and Stochastic Communication Protocol

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IEEE/CAA Journal of Automatica Sinica 2022年第6期9卷 978-989页

作者： Hang Geng Zidong Wang Yun Chen Xiaojian Yi Yuhua Cheng IEEE School of Automation Engineering University of Electronic Science and Technology of ChinaChengdu 611731China College of Electrical Engineering and Automation Shandong University of Science and TechnologyQingdao 266590China Department of Computer Science Brunel University LondonUxbridgeMiddlesexUB83PHUnited Kingdom Key Laboratory for IoT and Information Fusion Technology of Zhejiang School of AutomationHangzhou Dianzi UniversityHangzhou 310018China School of Mechatronical Engineering Beijing Institute of TechnologyBeijing 100081China

In this paper,a new filtering fusion problem is studied for nonlinear cyber-physical systems under errorvariance constraints and denial-of-service *** prevent data collision and reduce communication cost,the stochastic communication protocol is adopted in the sensor-to-filter channels to regulate the transmission order of *** sensor is allowed to enter the network according to the transmission priority decided by a set of independent and identicallydistributed random *** the defenders’view,the occurrence of the denial-of-service attack is governed by the randomly Bernoulli-distributed *** the local filtering stage,a set of variance-constrained local filters are designed where the upper bounds(on the filtering error covariances)are first acquired and later minimized by appropriately designing filter *** the fusion stage,all local estimates and error covariances are combined to develop a variance-constrained fusion estimator under the federated fusion ***,the performance of the fusion estimator is examined by studying the boundedness of the fused error covariance.A simulation example is finally presented to demonstrate the effectiveness of the proposed fusion estimator.

关键词： Cyber-physical system(CPS) denial-of-service attack stochastic communication protocol(SCP) variance-constrained filtering fusion

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Research on Broadband Complex Electromagnetic Environment Signal Simulation technology Based on Channel Reconstruction 16

Research on Broadband Complex Electromagnetic Environment Si...

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

作者： Wang, Zhengli Tian, Shulin Tian, Yu Zeng, Hao Lyu, Jianhong Wang, Meng College of Automation Engineering University of Electronic Science and Technology of China Chengdu China The 29th Research Institute of China Electronics Technology Group Corporation Corporation Chengdu China

ISBN: (纸本)9798350327144

Based on an efficient channelized structure, this research focuses on channelized reception, channel reconstruction transmission, and baseband signal generation. A broadband complex electromagnetic signal simulation method is proposed, and a design of the simulation scheme for broadband complex electromagnetic signals is implemented using domestically produced devices. Through simulation and experiments, it is demonstrated that this method can achieve multi-target simulation capability in a complex electromagnetic environment with an instantaneous bandwidth of 4 GHz. It can also be extended for applications in radar target simulators ranging from 0.8 GHz to 18 GHz. © 2023 IEEE.

关键词： Electromagnetic simulation

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A study on the effects of long-term radiation exposure on superconducting magnets in MRI-Guided proton therapy

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Results in Physics 2024年 61卷

作者： Dai, Wei Dong, Lang Xie, Guo-Yu Wang, Ming Li, Guo-Dong Lin, Jun-Ze College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu 610059 China Shanghai Institute of Applied Physics Shanghai 201800 China

In this publication, we offer the first assessment of the long-term radiation impact on superconducting magnets utilized in MRI-guided proton therapy. We explore both uniform and non-uniform magnetic fields and create three improved therapy plans for shallow (brain), medium (liver), and deep (prostate) targets. The evaluation of radiation damage in superconducting magnets using therapy plans is carried out through the implementation of the Monte Carlo method, molecular dynamics method, and modified NRT model. The results of the three plans show that a large amount of particles do enter the superconducting magnet during the treatment, with a preponderance of photons and neutrons. For superconducting magnets in MRI systems, the closer the coil is to the target area, the greater the radiation damage, and the extent of radiation damage increases with the energy of the incident proton beam. The PKA with high energy can induce temperature fluctuations locally in the superconducting coils, but does not pose a threat to its mechanical properties. Following 20 years of continuous operation, the DPA of the internal coils is about 2.3097E-17, and the maximum dose to insulating layer is about 1.25 Gy. The results of this paper show that MRI-guided proton therapy poses no threat to the long-term operation of superconducting magnets. © 2024

关键词： MRI-guided proton therapy Radiation damage Superconducting magnets

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