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9th International Symposium on Sensors, Mechatronics, and automation System, ISSMAS 2023

作者： He, Huajun Zheng, Fuzhong Zhang, Jie Sun, Shaohua Tang, Zhichao Cao, Qiang School of Automation Chengdu University of Information Technology Chengdu610225 China Intelligent Manufacturing and Automobile School Chongqing College of Electronic Engineering Chongqing401331 China NO.7 Oil Production Plant PetroChina Changqing Oilfield Company Qingyang745708 China

ISBN: (纸本)9781510672802

Monitoring the microstrain on the surface of equipment is of great significance for its health monitoring and daily maintenance. A microstrain detection method is researched in this article based on the photoluminescence characteristics of SWCNT materials. The detection of microstrain can be achieved by using the SWCNT strain sensing film pasted on the surface of the tested equipment. A standard strain gauge can also be pasted on the back of the corresponding position where the SWCNT strain sensing film is pasted to check the detection accuracy of the SWCNT strain sensing film. A microstrain loading device is designed in this paper. Then, a simulation study on the stress distribution of components with different shapes and sizes is conducted. Simulation results indicate that the geometric shape of the tested component has a significant impact on the stress distribution. © 2024 SPIE.

关键词： Sensors Signal processing Design and modelling Humidity Photoluminescence Safety equipment Analog to digital converters Scientific research Speckle interferometry Thin films

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Research on Microseismic Triggered Image Acquisition System for Landslide Monotoring 5

Research on Microseismic Triggered Image Acquisition System ...

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5th IEEE Information technology, Networking, Electronic and automation Control Conference, ITNEC 2021

作者： Yang, Liu Zhu, Xing Xi, Hewei He, Zhaoqing Zhu, Qingsong Chengdu University of Technology State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu610059 China Chengdu University of Technology College of Nuclear Technology and Automation Engineering Chengdu610059 China

ISBN: (纸本)9781665415989

The previous landslide image acquisition system adopts a continuous image acquisition and transmission method, which has high consumption and produces many redundant data. Therefore, a new landslide image acquisition system is developed in this paper. The system adopts seismic geophone to gain landslide motion data, and then the dual limit comparator filters out the landslide motion data and forms a trigger signal to wake up the system. In the end, after being awakened, the embedded micro-controller collects and transmits the image. With the intermittent image acquisition and transmission method, the equipment keeps in a low-power consumption for a long time when the landslide movement is not severe. The equipment will be awakened only when the landslide movement is violent. It turns out that compared with the continuous acquisition method, the power consumption of the system can be reduced by about 66%, and the data amount can be reduced by about 60KB when the system is triggered only once in a minute. © 2021 IEEE.

关键词： Landslides

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Monte Carlo Modeling and Verification of 6 MV Linear Accelerator

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World Journal of engineering and technology 2022年第2期10卷 213-223页

作者： Shixiong Lu Haijun Deng College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu China Department of Oncology Sichuan Mianyang 404 Hospital Mianyang China

Purpose: To model the ELEKTA COMPACT accelerator head by using EGSnrc/BEAMnrc/DOSXYZnrc and to validatethe simulation according to the depth-dose and lateral profiles of different radiation fields measured by the water phantom. Methods: IBA Blue Water Phantom2 and CC13 Ionization Chamber were used to measure the depth-dose curves at 10 cm × 10 cm field and profile curves at 10 cm depth underwater. In BEAMnrc, the main components of accelerator head and the initial electron beam are established based on the specifications file, and the phase space file containing the photon beam information is generated. In DOXYZnrc, phase space files were used to irradiate a homogeneous water phantom of the same size as the IBA water phantom, and the simulated percentage depth dose curves and lateral profiles were outputted. The accuracy of the model was evaluated by mean square error (MSE) compared with the measured data. PDD curves are used to determine the energy of the initial electron beam. Dose profile curves are used to adjust the flattening filter. The penumbra on lateral profiles is used to adjust the full-width half-maximum (FWHM) of the electron source. Result: The electron energy of 5.8 MeV was considered the best match after comparing the PDD curves of 5.6 - 6.2 MeV electron beams. The flattening filter can only be adjusted by trial. In the final result, the maximum fluctuation of profile curve within 80% of the maximum field size is less than 3%, which meets the requirements of field flatness. The optimum FWHM for different fields is not consistent due to the Transmission penumbra. But a match can be approached by adjusting the FWHM every 10 cm field size.

关键词： EGSnrc/BEAMnrc/DOSXYZnrc Linear Accelerator Initial Electron Beam PDD Lateral Profiles

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Multi-objective Optimization of A CCHP System Model Integrated with P2G for Decarbonization 6

Multi-objective Optimization of A CCHP System Model Integrat...

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

作者： Wei, Pengyu Bamisile, Olusola Cai, Dongsheng Li, Jian Adun, Humphrey Huang, Qi Chengdu University of Technology School of Nuclear Technology and Automation Engineering Chengdu China University of Electronic Science and Technology of China Sichuan Provincial Key Lab of Power System Wide-area Measurement and Control Chengdu China Cyprus International University KKTC Energy Systems Engineering Department Mersin10 Turkey

ISBN: (纸本)9798350347159

To realize the dual carbon policy, the goal of energy saving, and emission reduction, it is important to develop ways to better promote the low carbon economic operation of energy systems. Therefore, this research proposes an optimal operation strategy considering the electric-gas-cooling-heat demand response. Considering the demand response of each participant, an integrated energy system model with photovoltaic, wind energy, and traditional grid as energy supply. Also, electric energy, natural gas, cooling, and heating subsystems with co-production are established. With minimizing the overall system operation cost and optimizing environmental protection, the improved particle swarm optimization algorithm is used to solve the multi-constrained objective optimization problem. Finally, the optimized model is tested. The results from this study show that the energy system under cogeneration can find a balance between economy and environmental friendliness, and provide a reference for the subsequent energy supply configuration. © 2022 IEEE.

关键词： Environmental protection

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Adaptive Sliding Mode Control for Motor Cyber Physical System 12

Adaptive Sliding Mode Control for Motor Cyber Physical Syste...

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12th International Conference on Information Science and technology, ICIST 2022

作者： Miao, Zhenhai Li, Meng Sun, Zepei Chen, Yong School of Automation Engineering University of Electronic Science and Technology of China Chengdu China College of Information Science and Engineering Huaqiao University Xiamen China

ISBN: (数字)9781665485821

ISBN: (纸本)9781665485821

In this paper, the control problem of remote motor in cyber physical system (CPSs) under external disturbance is studied. An adaptive sliding mode reaching law and a double-threshold event-triggered strategy is proposed. Firstly, to reduce the chattering of the sliding mode surface, a new adaptive reaching law is designed, and the reachability is confirmed. In addition, a double-threshold event triggered strategy is proposed in order to effectively lower the system's consumption of communication resources. Finally, the stability of the system is proved. Furthermore, the effectiveness of the method is verified using a servo motor system. © 2022 IEEE.

关键词： Cyber Physical System

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BCDNet: A Fast Residual Neural Network For Invasive Ductal Carcinoma Detection

arXiv

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arXiv 2024年

作者： Lin, Yujia Lian, Aiwei Liao, Mingyu Yuan, Shuangjie Glasgow College University of Electronic Science and Technology of China Chengdu China School of Automation Engineering University of Electronic Science and Technology of China Chengdu China

It is of great significance to diagnose Invasive Ductal Carcinoma (IDC) in early stage, which is the most common subtype of breast cancer. Although the powerful models in the Computer-Aided Diagnosis (CAD) systems provide promising results, it is still difficult to integrate them into other medical devices or use them without sufficient computation resource. In this paper, we propose BCDNet, which firstly upsamples the input image by the residual block and use smaller convolutional block and a special MLP to learn features. BCDNet is proofed to effectively detect IDC in histopathological RGB images with an average accuracy of 91.6% and reduce training consumption effectively compared to ResNet 50 and ViT-B-16. © 2024, CC BY.

关键词： Lung cancer

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Ion Recombination Correction Factor in Ultra-High Dose Rate X-Ray Beams for Absolute Dose Measurement Using Micro-Thin Cylinder Ionization Chamber

SSRN

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SSRN 2024年

作者： Hao, Yanmei Bai, Sen Lai, Wanchang School of Nuclear Technology and Automation Engineering Chengdu University of Technology China Radiotherapy Physics & Technology Center Cancer Center West China Hospital Sichuan University China

Free electron laser (FEL) accelerators with ultra-high dose-rate X-Ray (X-UHDR) irradiations (>40 Gy/s) are emerging as a novel light source with the potential to revolutionize modern radiotherapy by inducing the which demonstrates increased tolerance of normal tissues compared to conventional dose rates. The accurate dosimetry is crucial for the implementation of FEL technology in clinical radiation therapy (RT) treatments. While ionization chambers are currently the standard in RT, addressing the issue of significant charge recombination at high dose rates is essential. In this context, we introduce a prototype of a micro-thin cylinder ionization chamber (MC-IC) with a 0.2 mm gap and analyze its charge collection behavior in X-UHDR beams to assess its potential application in flash RT. The impact of the ion collection efficiency (ICE) is calculated using various methods, along with a comparative and analytical discussion of the results. As expected, the MI-IC resulted in higher ICE at bias voltage during the saturation region, with a measured efficiency exceeding 95% with dose-per-pulse values up towards and above 8.825 Gy/pulse. The Boag theory and the two-voltage method (TVA) were employed to calculate the MI-IC ICE, and the results were compared with an empirical logistic model. The results confirmed that the TVA is suitable to use for the MI_IC in X-UHDR beams with free-electric fraction value . The general Boag model 3 agreed well with a high free-electric fraction value of p>0.5. © 2024, The Authors. All rights reserved.

关键词： Free electron lasers

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PETRFusion: Multi-Sensor Fusion Based BEV Semantic Segmentation Network for Autonomous Driving

PETRFusion: Multi-Sensor Fusion Based BEV Semantic Segmentat...

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International Conference on Intelligent Transportation

作者： Yang Zhao Jingyu Du Qihang Yang Ningze Cai Zhinan Peng Huiqin Zhan Hong Cheng School of Automation Engineering University of Electronic Science and Technology of China Chengdu China Glasgow College University of Electronic Science and Technology of China Chengdu China

ISBN: (数字)9798331505929

ISBN: (纸本)9798331505936

Bird's Eye View (BEV) based perception algorithms are receiving increasing attention in the field of autonomous driving, how to more effectively utilize multi-sensor data in BEV is a challenge. In this paper, we propose PETRFusion, a BEV segmentation network that integrates multiple cameras with a LiDAR sensor. We focus on the task of BEV segmentation, designing the network architecture based on the similarity between LiDAR point clouds and semantic segmentation maps. The proposed method uses point cloud features as queries for semantic segmentation and employs Transformers to fuse image features with point cloud features, thereby maximizing the preservation of 3D spatial information from the point cloud. Additionally, we enhance the 3D positional encoder of PETR to provide more reliable 3D image features. We conduct detailed validation on the nuScenes dataset and achieve state-of-the-art results.

关键词： Point cloud compression Three-dimensional displays Laser radar Semantic segmentation Network architecture Cameras Transformers Reliability Autonomous vehicles Intelligent transportation systems

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J-TEXT achievements in turbulence and transport in support of future device/reactor

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Plasma Science and technology 2024年第11期26卷 1-21页

作者： Zhipeng CHEN Zhangsheng HUANG Min JIANG Ting LONG Lu WANG Weixin GUO Zhoujun YANG Hai LIU Tao LAN Kaijun ZHAO Yuhong XU Rui KE Youwen SUN Hanhui LI Wen HE Ge ZHUANG Yuejiang SHI Wulyu ZHONG Yonghua DING Yunfeng LIANG Wenjing TIAN Xin XU Guodong ZHANG M.S.HUSSAIN Patrick H.DIAMOND State Key Laboratory of Advanced Electromagnetic Technology International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma PhysicsSchool of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074People’s Republic of China Southwestern Institute of Physics Chengdu 610041People’s Republic of China Institute of Fusion Science School of Physical Science and TechnologySouthwest Jiaotong UniversityChengdu 610031People’s Republic of China Department of Plasma Physics and Fusion Engineering University of Science and Technology of ChinaHefei 230026People’s Republic of China School of Nuclear Science and Engineering East China University of TechnologyNanchang 330013People’s Republic of China Institute of Plasma Physics Chinese Academy of SciencesHefei 230031People’s Republic of China College of Electrical Engineering&New Energy China Three Gorges UniversityYichang 443002People’s Republic of China Department of Engineering and Applied Physics School of Physical SciencesUniversity of Science and Technology of ChinaHefei 230026People’s Republic of China ENN Science and Technology Development Co.Ltd. and Hebei Key Laboratory of Compact FusionLangfang 065001People’s Republic of China Forschungszentrum Jülich GmbH Institut für Energie-und Klimaforschung-PlasmaphysikPartner of the Trilateral Euregio Cluster(TEC)Jülich 52425Germany Tsinghua University Beijing 100084People’s Republic of China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230026People’s Republic of China Center for Astrophysics and Space Sciences University of California San DiegoLa Jolla CA 92093United States of America

Following the reconstruction of the TEXT tokamak at Huazhong university of Science and technology in China, renamed as J-TEXT, a plethora of experimental and theoretical investigations has been conducted to elucidate the intricacies of turbulent transport within the tokamak configuration. These endeavors encompass not only the J-TEXT device's experimental advancements but also delve into critical issues pertinent to the optimization of future fusion devices and reactors. The research includes topics on the suppression of turbulence, flow drive and damping, density limit, non-local transport, intrinsic toroidal flow, turbulence and flow with magnetic islands, turbulent transport in the stochastic layer, and turbulence and zonal flow with energetic particles or helium ash. Several important achievements have been made in the last few years, which will be further elaborated upon in this comprehensive review.

关键词： J-TEXT tokamak turbulence transport flow

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Minimizing Data Collection Latency for Coexisting Time-Critical Wireless Networks with Tree Topologies

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IEEE Transactions on Network and Service Management 2025年第3期22卷 2354-2369页

作者： Zhang, Jialin Liang, Wei Yang, Bo Shi, Huaguang Liang, Ying-Chang Chinese Academy of Sciences State Key Laboratory of Robotics Shenyang Institute of Automation Shenyang110016 China Chinese Academy of Sciences Key Laboratory of Networked Control System Shenyang Institute of Automation Shenyang110016 China Northwest A and F University College of Information Engineering Yangling712100 China Henan University School of Artificial Intelligence Zhengzhou450046 China University of Electronic Science and Technology of China Center for Intelligent Networking and Communications Chengdu611731 China

Time-Critical Wireless Network (TCWN) is a promising communication technology that can satisfy the low latency, high reliability, and deterministic requirements of mission-critical applications. Multiple TCWNs required by various applications inevitably coexist with each other. Most existing works aim to achieve acceptable latency or consider the simplest topology (i.e., line topology). As latency requirements become more stringent, exploring the minimum data collection latency becomes an interesting problem. In this paper, the coexisting system consists of multiple tree-topology-based TCWNs. We first establish a conversion framework to convert an arbitrary tree topology into multiple analogous line topologies to reduce the analysis complexity. We then propose a Time-Critical wireless network Scheduling (TCS) algorithm to minimize the data collection latency of coexisting TCWNs. The TCS algorithm consists of two phases. In the internetwork scheduling phase, we strictly derive a general expression to characterize the practical network requirements. In the intranetwork scheduling phase, we design two levels of priority assignment algorithms to accurately characterize the critical states and resource requirements of different nodes. We conduct extensive simulations to verify the effectiveness of the TCS algorithm. The evaluation results show that the TCS algorithm can achieve minimum data collection latency in more than 99.956% cases, and the maximum difference compared to the optimal value is one time slot. © 2004-2012 IEEE.

关键词： Scheduling algorithms

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