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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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Current Status of Rn-220 Chamber Carrier Aerosol Modulation Research

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Journal of Geoscience and Environment Protection 2023年第4期11卷 30-36页

作者： Yanan Liu Yu Cheng College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu China

Radon is the most important source of natural radiation to human beings and the second major causative agent of lung cancer other than smoking. In recent years, the hazards of human exposure to thoron (Rn-220), another isotope of radon, and its progeny have gained consensus. To accurately evaluate the dose level and hazards of Rn-220 and its progeny, a standard Rn-220 chamber with strong regulation ability for Rn-220 and its progeny needs to be established for the scale or calibration of measurement instruments. This paper describes the hazards, sources, behavioral characteristics of Rn-220 and its progeny, and some representative Rn-220 chambers established in various countries.

关键词： Thoron Rn-220 Chamber Aerosol Modulation

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Research on reactor power prediction of nuclear power plant based on multivariate optimization GRU model

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International Journal of Advanced nuclear Reactor Design and technology 2024年第2期6卷 78-89页

作者： Tan, Canyi Wang, Bo Li, Jiangkuan Chen, Jie Liang, Biao Zheng, Shangcai Han, Rui Tian, Ruifeng Tan, Sichao College of Nuclear Science and Technology Harbin Engineering University Harbin150001 China Heilongjiang Provincial Key Laboratory of Nuclear Power System & Equipment Harbin Engineering University Harbin150001 China Nuclear Power Institute of China Chengdu610213 China

In the operation of nuclear power plants, the accurate prediction of power change trends is crucial for ensuring safety and stability. In this work, a ML-GRU-RS method, based on model-agnostic meta-learning (MAML), gate recurrent unit (GRU), and random search optimization, is proposed for the long-term prediction of key parameters of nuclear power plants. This method combines the fast adaptability of MAML, the time series data processing capability of GRU, and the optimization efficiency of random search to achieve high-precision predictions under varying power conditions. The results demonstrate that this method can effectively predict the future trends of key parameters in nuclear power plants. The ability of operators to anticipate these trends has been significantly enhanced, contributing to the overall safety of the nuclear power plants. © 2024 Xi'an Jiaotong university

关键词： Prediction models

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SR-STM: Simulation-Reality Spatial-Temporal Model for Early Warning of Power Tilt in nuclear Power Plants

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IEEE Internet of Things Journal 2025年第11期12卷 17854-17868页

作者： Lin, Weiqing Miao, Xiren Chen, Jing Duan, Pengbin Ye, Mingxin Xu, Yong Liu, Xinyu Jiang, Hao Fuzhou University College of Electrical Engineering and Automation Fuzhou350108 China China Nuclear Power Technology Research Institute Company Limited Shenzhen518000 China China National Nuclear Power Operation Maintenance Technology Company Limited Hangzhou311200 China

Balanced in-core power levels in nuclear power plants (NPPs) are critical for safety, whereas power tilt disrupts this balance, reducing safety margins and posing risks.0Early warning for power tilt offers an effective way of optimizing monitoring. Due to abnormal-sample scarcity and security concerns, common data-driven models train on the simulated data generated by simulators. However, achieving a satisfactory effect in practices is difficult because simulators imperfectly emulate reality. Thus, we propose a power tilt-oriented early warning method called simulation-reality spatial-temporal model (SR-STM).0Motivated by the physical model in NPPs, a knowledge-guided hierarchical graph is designed to characterize spatial correlations among local power levels for SR-STM's input. The SR-STM uses a lightweight spatial-temporal network (LST-Net) as a feature extractor, balancing precision and efficiency. To bridge sim-real inter-domain discrepancies, SR-STM utilizes node-alignment adversarial learning for fine weight tuning in subdomain, and eigenvalue-based scale alignment for sim-real feature proximity. Forecasting local power levels using the SR-STM, dynamic metrics and alarm limits are calculated and compared to perform the early warning task. The online experimental prototype verifies that SR-STM surpasses various state-of-the-art methods in terms of early warning and sim-real cross-domain tasks. © 2025 IEEE.

关键词： Eigenvalues and eigenfunctions

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Research on Rural Income Planting Strategies Based on Linear Programming and Monte Carlo Simulation 24

Research on Rural Income Planting Strategies Based on Linear...

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2024 International Conference on Economic Data Analytics and Artificial Intelligence, EDAI 2024

作者： Zhang, Huangnian Ji, Shuai Zhang, Chun Liu, Chang Chen, Li School of Nuclear Technology and Automation Engineering Chengdu University of Technology Sichuan Chengdu China College of Marine Life Sciences Ocean University of China Shandong Qingdao China School of Rehabilitation Medicine Qilu Medical University Shandong Zibo China

ISBN: (纸本)9798400713255

Utilizing cultivated land resources and choosing appropriate crop planting strategies are of crucial importance for rural economic development. This paper summarizes the production structure of 74,000 villages in Shandong Province. By taking the average values of the selling prices, production costs, and cultivated areas of each crop, it centrally reflects the production characteristics of this province. Based on previous years' planting data, a maximization objective function is established using linear programming + 0-1 programming to analyse three problems under different planting scenarios [1]. In problem one, the planting strategy that maximizes total revenue is sought. The linear programming + 0-1 programming method and three-dimensional arrays are used to discuss the limiting conditions. The 0-1 variable is used to control and prevent yield reduction and solve the difficulties in planting leguminous crops. The optimal planting strategies are obtained respectively under the two circumstances of overproduction leading to unsalable products and a 50% price reduction for sale. In problem two, a dynamic programming model is established through uncertainty analysis. Monte Carlo simulation is used to quantify the planting risk coefficient and obtain the optimal strategy under the influence of uncertain factors. In problem three, considering the substitutability, complementarity, and correlation of crops, by using Euclidean distance to calculate the similarity between various crops, the concepts of reward items and penalty items are introduced, and planning is carried out on the basis of the second problem. In general, this paper introduces new methods and considers multiple factors to make the strategy more practical and provide decision support for rural economic development. © 2024 Copyright held by the owner/author(s).

关键词： Dynamic programming

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Indacenodithiophene-based single-component ambipolar polymer for high-performance vertical organic electrochemical transistors and inverters

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Aggregate 2024年第5期5卷 297-306页

作者： Yimin Sun Yu Lan Meisi Li Wang Feng Miao Xie Yueping Lai Wei Li Yuhua Cheng Jianhua Chen Wei Huang Liang-Wen Feng Junqiao Ding School of Chemical Science and Technology Yunnan UniversityKunmingChina School of Automation Engineering University of Electronic Science and Technology of China(UESTC)ChengduChina Key Laboratory of Green Chemistry & Technology Ministry of EducationCollege of ChemistrySichuan UniversityChengduChina Southwest United Graduate School KunmingChina

Single-component ambipolar polymers are highly desirable for organic electrochem-ical transistors(OECTs)and integration into complementary logic circuits with reduced process ***,they often suffer from imbalanced p-type and n-type characteristics and/or stability ***,a novel single-component ambipolar polymer,namely,gIDT–BBT is reported based on indacenodithiophene(IDT)as the electron donor,benzobisthiadiazole(BBT)as the electron acceptor and oligo ethylene glycol(OEG)as the side ***ﬁtting from the extended backbone planarity and rigidity of IDT,pronounced electron-withdrawing capabil-ity of BBT,favored ionic transport from OEG together with vertical OECT device structure,a nearly balanced ambipolar OECT performance is achieved for gIDT–BBT,revealing a high transconductance of 155.05±1.58/27.28±0.92 mS,a high current on/off ratio>10^(6) and an excellent operational stability under both p-type and n-type operation *** gIDT–BBT in hand,furthermore,vertically stacked complementary inverters are successfully fabricated to show a maximum voltage gain of 28 V V^(-1)(V_(IN)=0.9 V)and stable operation over 1000 switching cycles,and then used for efﬁcient electrooculogram *** work provides a new approach for the development of ambipolar single-component organic mixed ionic–electronic conductors and establishes a foundation for the manufacture of high-performance ambipolar OECTs and associated complementary circuits.

关键词： electrooculogram recording inverters single-component ambipolar polymer vertical organic electro-chemical transistors

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Multi-modal feature fusion for 3D object detection in the production workshop

Multi-modal feature fusion for 3D object detection in the pr...

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作者： Hou, Rui Chen, Guangzhu Han, Yinhe Tang, Zaizuo Ru, Qingjun College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu China College of Computer Science and Cyber Security Chengdu University of Technology Chengdu China

3D object detection technology is of great significance to realize intelligent perception and ensure the production safety of a workshop. Existing 3D object detection relies on large-scale, high-quality 3D annotation data and is unsuitable for actual workshop scenes’ perception. This paper proposes a multi-modal feature fusion 3D object detection method (MFF3D) for a production workshop. The design of MFF3D includes the following steps: (1) Improved YOLOv3 attains the 2D prior region of an object, and RGB-D saliency detection obtains the object image pixels in that region. (2) Depth image pixels corresponding to the object are projected to generate the object's frustum point cloud, and a multi-modal feature fusion strategy simplifies the object's frustum point cloud, so as to remove outlier points and reduce the number of point clouds. This can replace the 3D object reasoning process based on deep neural networks;(3) An axis-aligned bounding box algorithm is used to generate the object's 3D bounding box, and principal component analysis algorithm (PCA) is used to calculate the object's pose information. MFF3D is applied in the workshop, and experiments verify the feasibility and detection accuracy. We set up a production workshop object dataset (PWOD) for experimental evaluation. In the case of a small amount of 2D annotation data and no 3D annotation data, experimental results show that when the threshold value of intersection over union of 3D object (IoU3D) is 0.5, the mean average precision value of 3D object (mAP3D) reaches 60.31, and the detection speed reaches 3 FPS. MFF3D does not rely on 3D annotation data and can effectively detect objects of a production workshop. © 2021 Elsevier B.V.

关键词： Object detection

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Speed Control of Permanent Magnet Synchronous Motor for Flywheel Energy Storage Based on Improved Self Disturbance Rejection Control

Speed Control of Permanent Magnet Synchronous Motor for Flyw...

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IEEE Asia Power and Energy engineering Conference (APEEC)

作者： Zhou Zheng Dongsheng Cai Olusola Bamisile Qi Huang The College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu China

ISBN: (数字)9798350373479

ISBN: (纸本)9798350373486

Permanent magnet synchronous motors (PMSMs) can be used as driving motors for flywheel energy storage systems(FESS) because of their exceptional torque and power density characteristics. Accurate speed control is crucial for PMSM with large moment of inertia. This article proposes an improved Active Disturbance Rejection Control (ADRC) strategy. Improved ADRC utilizes a novel smooth nonlinear xfal function to improve the State Extended Observer (ESO), addressing the shortcomings of low flexibility and unsatisfactory disturbance suppression in ADRC, and further improving the speed performance of PMSM. A speed control platform for PMSM was built on the MATLAB/Simulink platform, and compared with sliding mode control, fuzzy control, and ADRC methods. In the experimental results, the speed response of the improved ADRC is the fastest, and the overshoot is reduced from 9.42% to 2.08% compared with the conventional ADRC, and the squared integral error of the electromagnetic torque is also the lowest, which proves the stability of the improved ADRC.

关键词： Robust control Power system measurements Motor drives Torque Velocity control Observers Permanent magnet motors

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Investigating the minimum detectable activity concentration and contributing factors in airborne gamma-ray spectrometry

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nuclear Science and Techniques 2021年第10期32卷 30-38页

作者： Yi Gu Kun Sun Liang-Quan Ge Yuan-Dong Li Qing-Xian Zhang Xuan Guan Wan-Chang Lai Zhong-Xiang Lin Xiao-Zhong Han The College of Nuclear Technology and Automation Engineering Chengdu University of TechnologyChengdu 610059China Key Laboratory of Applied Nuclear Techniques in Geosciences of Sichuan Province Chengdu University of TechnologyChengdu 610059China China Coal Geology Group Co. LtdBeijing 100040China

In this study,the theory of minimum detectable activity concentration(MDAC)for airborne gamma-ray spectrometry(AGS)was derived,and the relationship between the MDAC and the intrinsic effi-ciency of a scintillation counter,volume,and energy res-olution of scintillation crystals,and flight altitude of an aircraft was *** verify this theory,experi-mental devices based on NaI and CeBr 3 scintillation counters were prepared,and the potassium,uranium,and thorium contents in calibration pads obtained via the stripping ratio method and theory were *** MDACs of AGS under different conditions were calculated and analyzed using the proposed theory and the Monte Carlo *** relative errors found via a comparison of the experimental and theoretical results were less than 4%.The theory of MDAC can guide the work of AGS in probing areas with low radioactivity.

关键词： Airborne gamma-ray spectrometry(AGS) Minimum detectable activity concentration(MDAC) Sensitivity

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Development of Thick Film Integrated Circuit for nuclear Radiation Measurement

Development of Thick Film Integrated Circuit for Nuclear Rad...

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China Instrument and Control Society (ACCIS), Academic Conference of

作者： Xi Ren Chuanhao Hu Guoqiang Zeng Honglin Zhao Haotian Li Tao Yue The college of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu China

ISBN: (数字)9798350350326

ISBN: (纸本)9798350350333

Most existing nuclear radiation measurement circuits are implemented based on PCB board-level technology, which has low integration, significant signal loss, and is susceptible to environmental interference, thus preventing the achievement of high-precision measurements in complex radiation fields. Consequently, this paper presents research on thick-film integrated circuits for nuclear radiation measurement. Resistors, capacitors, wires, and the interconnections of devices, are fabricated on an Al2O3 ceramic substrate through a combination of film-forming and surfacemount technologies. A thick-film integrated circuit has been developed for the pre-amplification, filtering, and peak holding of nuclear radiation detectors. This circuit offers advantages such as high integration, minimal parasitic effects, radiation resistance, and robust anti-interference capabilities. An energy spectrum measurement system has been constructed, utilizing the dedicated thick-film integrated circuit developed in this paper, achieving an energy resolution of 6.2% at 662 keV for the 3-inch NaI(Tl) detector, and 3.0% at 662 keV for the 3-inch LaBr3(Ce) detector, and 4.5% at 59.5 keV for the 5mm×5mm quasi-hemispherical CZT detector. The energy spectrum measurement results indicate that the thick-film integrated circuit exhibits exceptional performance and possesses significant application potential within the domain of nuclear radiation detection.

关键词： Integrated circuits Atmospheric measurements Pulse measurements Radiation detectors Energy resolution Detectors Particle measurements Loss measurement nuclear measurements Thickness measurement

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