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SSRN 2025年

作者： Yu, Guanghui Yan, Yulin Gu, Zhixing Song, Tianxin Gong, Zhengyu Chen, Wei Zhang, Zhiwei College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu610059 China Applied Nuclear Technology in Geosciences Key Laboratory of Sichuan Province Chengdu University of Technology Chengdu610059 China

Water hammer has always been one of the most important thermal safety issues in nuclear power plants. In the piping system of a nuclear power plant, water hammer can cause pipe vibration, equipment damage, and even pipe rupture, challenging the structural integrity and safety of the nuclear reactor. To improve computational efficiency, the simulation of water hammer waves is often calculated using a one-dimensional model, but this does not provide accurate pressure variations and intuitive information about the flow field. Especially for systems with complex geometric mechanisms, it is important to accurately simulate the dynamic interaction between the fluid and the system equipment. Therefore, it is important to perform multi-dimensional water hammer simulations. In this paper, a single-phase water hammer three-dimensional analysis code is developed based on the finite volume method. Preliminary verification of the code was carried out using a single-phase water-based wave tube benchmark case, a two-dimensional case, and a three-dimensional case. The simulation results show that the developed code can capture the propagation characteristics of the pressure wave in a relatively reasonable manner, especially the reflection and superposition behavior of the pressure wave can be observed. This indicates that the proposed numerical model and algorithm are reasonable and accurate in capturing the three-dimensional propagation process of single-phase pressure waves. The relevant research results can provide some theoretical and methodological support for the analysis and evaluation of water hammers in nuclear power plant reactors. © 2025, The Authors. All rights reserved.

关键词： Compressible flow

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An Unbalanced PWM with Minimum Current Trajectory for a Semi-Dual-Bridge Resonant Converter 2nd

An Unbalanced PWM with Minimum Current Trajectory for a S...

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2nd International Conference on Smart Electrical Grid and Renewable Energy, SEGRE 2024

作者： Jin, Shusheng Hu, Song Li, Qiaoshan Wang, Yiwang Lu, Ming School of Electrical Engineering and Automation Changshu Institute of Technology Jiangsu Suzhou215000 China School of Electronic Information Engineering Suzhou Vocational University Jiangsu Suzhou215000 China College of Applied Science and Technology Beijing Union University Beijing100101 China

ISBN: (纸本)9789819624553

In this paper, an unbalanced pulse-width modulation (UPWM) strategy for a semi-dual-bridge resonant converter (SDBRC) is proposed, utilizing minimizing current trajectory (MCT) control to reduce conduction loss and improve the operation efficiency of the SDBRC. Firstly, the UPWM strategy is proposed and the optimal operation mode is selected. All switches of the converter with the optimal mode can work in zero-voltage switching (ZVS), even at a voltage gain of 0.5. Next, an equivalent circuit of the converter is proposed employing the Fundamental Harmonics Approximation (FHA) approach. Furthermore, the resonant current and power formulas are derived, and MCT control is performed to minimize the resonant current. Finally, the theoretical analysis are validated through a series of simulations and experiments. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Pulse width modulation

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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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Analysis of a New Consequent-Pole Hybrid Excited Machine with Drum Winding

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IEEE Transactions on Magnetics 2025年

作者： Qu, Guangyu Yu, Jinyi Li, Zhenghan Liu, Yingcan Jiang, Yongjiang College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu610059 China College of Automation & College of Artificial Intelligence Nanjing University of Posts and Telecommunications Nanjing210023 China School of Electrical Engineering Southeast University Nanjing210096 China

In this paper, a new consequent-pole hybrid excited machine with drum winding (CPHE-DW machine) is proposed for electric vehicles (EVs). The stator tooth, which is divided into the armature and excitation tooth, is designed as the consequent-tooth structure to construct two individual flux paths. The dimension of the armature tooth is slightly larger than the excitation tooth. The drum winding is placed in the stator, which can be regarded as both the armature and excitation winding. Accordingly, the current input into the drum winding can be divided into the AC and DC component, in which the air-gap flux is regulated by the DC component. The U-type permanent magnets (PMs) are housed in the consequent-pole rotor with the sequence of PM-iron-PM-iron. Owing to the consequent-pole and consequent-tooth structure, a particular electromagnetic coupling effect can be achieved. The operating principle of the electromagnetic coupling effect is studied by several analytical models. The main flux paths of this proposed machine are introduced. Several main electromagnetic properties are predicted by the finite element (FE) method. Finally, a prototype of the CPHE-DW machine is manufactured to validate the correctness of the FE-predictions and the analytical analysis. © 2025 IEEE.

关键词： Permanent magnets

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A study on data analysis utilizing the K -edge absorption spectroscopy in mixed thorium and uranium solutions

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International Journal of Advanced nuclear Reactor Design and technology 2025年第2期7卷 156-165页

作者： Han Yang Li Li Quanwei Liu Yingjie Ma Jianbin Zhou Liudong Hou Yongquan Qin Yantao Hu Jing Ma China Nuclear Power Engineering Co. Ltd Beijing 100840 China CNNC Engineering Research Center for Fuel Reprocessing Beijing 100840 China The College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu 610059 China

X-ray absorption spectroscopy stands as a non-destructive assay technique commonly employed in nuclear fuel reprocessing plants to analyze the concentration of elements such as uranium, plutonium,*** processing of absorption spectroscopy directly affects the measurement outcomes. In this study, an experimental setup for K -edge absorption spectrum has been established. Acknowledging the constraints of conventional K -edge absorption spectrum analysis, two improved methods are proposed, including the optimized method, and the cumulative counting method. A mixed sample of thorium and uranium was utilized to conduct an experimental study. Upon analyzing and experimental results, it was determined that the cumulative counting method offers better accuracy and simplicity in processing the absorption spectrum. During the spectrum processing, adopting a wide region of interest enhances the precision of results and reduce relative deviations, while omitting background subtraction aids in simplifying the process. The cumulative counting method can also be extended to the L -edge absorption spectrum.

关键词： X-ray Absorption spectroscopy K -edge Cumulative counting method

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Synthesis of CaTiO3@Ag@ZnO and its photocatalytic degradation of levofloxacin

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Ceramics International 2025年

作者： Huang, Liang Zhang, Leilei Chang, Zhiwen Chen, Cheng Fan, Fengyao Lu, Chunhai No.1 Dongsanlu Erxianqiao Sichuan Chengdu610059 China College of Nuclear Technology and Automation Engineering Chengdu University of Technology No.1 Dongsanlu Erxianqiao Sichuan Chengdu610059 China

This study presents a synthesis strategy for Z-scheme CaTiO3@Ag@ZnO (CTAZ) heterojunction photocatalysts and evaluates their performance in levofloxacin (LVF) degradation. Key operational parameters, including component ratios and solution pH, were systematically optimized. The optimized CTAZ-58 photocatalyst achieved over 90 % LVF removal efficiency within 100 min under visible light irradiation, demonstrating stable performance across four consecutive cycles. Comprehensive characterization via XRD, SEM, TEM, EPR, UV–Vis DRS, Mott-Schottky analysis, and EIS elucidated the material's charge transfer mechanism. This work advances the design of CaTiO3-based photocatalysts and provides a solar-driven solution for sustainable antibiotic remediation. © 2025

关键词： Charge transfer

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B3+-enhanced zinc aluminate microwave dielectric ceramics for thermally matched electronic packages with GaAs semiconductors

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Ceramics International 2025年

作者： Li, Fuyu Li, Yuanxun Huang, Liyuan Liu, Xinyan Hu, Chuanhao Tang, Ge Ruan, Limei Li, Chuming Shang, Yanfeng College of Nuclear Technology and Automation Engineering Chengdu University of Technology Sichuan Chengdu610059 China School of Electronic Science and Engineering University of Electronic Science and Technology of China Chengdu610054 China Tianfu Jiangxi Laboratory Chengdu641419 China

To ensure the reliability of integrated circuits, ceramic packaging materials need to combine microwave dielectric and thermal expansion properties that match those of semiconductors. Here, novel ZnAl2-xBxO4 ceramics are developed by solid-state sintering to meet the basic needs of electronic packaging. The B3+ can effectively improve the microstructure, density, and microwave dielectric properties of ZnAl2O4 ceramic. The ZnAl1.96B0.04O4 ceramic sintered at 1450 °C has a high relative density (∼96.4 %), uniformly distributed grains (average grain size = 2.98 μm), and excellent microwave dielectric properties (Εr = 8.3, Q × f = 68586 GHz, and τf = −46.5 ppm/°C). More importantly, the coefficient of thermal expansion (CTE = 7.21 ppm/°C) of the ZnAl1.96B0.04O4 ceramic can be nearly matched to GaAs semiconductors (CTEGaAs = 6.97 ppm/°C). The linearities of the thermal expansion curves of ZnAl2-xBxO4 ceramics are effectively improved. This ceramic has great potential for application in the electronic packaging of GaAs semiconductor devices. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： III-V semiconductors

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Decentralized linear–quadratic control and stabilization for networked control systems with d-step delay

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Automatica 2025年 177卷

作者： Wang, Na Li, Hongdan Lu, Xiao Li, Xun Zhang, Huanshui College of Electrical Engineering and Automation Shandong University of Science and Technology Qingdao266590 China College of Energy Storage Technology Shandong University of Science and Technology Qingdao266590 China Department of Applied Mathematics The Hong Kong Polytechnic University Kowloon Hong Kong China

This technical communique studies decentralized state feedback control and stabilization for networked control systems with time delay. Unlike previous studies with conservative conditions — such as lower block triangular systems, uncorrelated process noises, and classical information structures — we investigate a more general coupled system with a non-classical d-step delayed state sharing pattern and correlated process noises. The main challenge lies in that variable measurability of controllers caused by time delay complicates solving forward–backward stochastic difference equations which can be addressed using linear controller forms and the projection theorem. The key contributions are: (1) deriving an explicit form of the optimal linear controllers via Riccati equations, and (2) providing a sufficient condition for mean-square boundedness. A dual-motor drive system is used to validate the theoretical results. © 2025 Elsevier Ltd

关键词： Networked control systems

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Semiconductor Manufacturing Industry: Assessment, Challenges, and Future Trends 2

Semiconductor Manufacturing Industry: Assessment, Challenges...

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2nd International Conference on Advanced Innovations in Smart Cities, ICAISC 2025

作者： Musa, Yasmin Tantawi, Khalid Mikhail, Maged Ma, Jeffrey Alharthi, Dalal Flatt, Larry Potter, Lyn Motlow State Community College Department of Career Readiness SmyrnaTN United States Department of Engineering Management and Technology University of Tennessee at Chattanooga TN United States Purdue University Northwest Hammond Department of Engineering Technology IN United States Saint Louis University Saint Louis Department of Mechanical Engineering MO United States College of Applied Science and Technology University of Arizona Tuscan AZ United States Robotics and Automation Center Motlow State Community College McMinnvilleTN United States Chattanooga State Community College Chattanooga State Community College Dept. of Engineering Systems Tech. ChattanoogaTN United States

ISBN: (纸本)9798331506995

In this work we evaluate the state of the semiconductor manufacturing industry and its challenges and trends. Future trends in the industry are analyzed from three perspectives: the evolution of Industry 4.0, the advances in semiconductor materials, and the impact of the Covid-19 Pandemic. The semiconductor manufacturing industry witnessed an acute decline in the United States and other regions in the two decades prior to the CoVid-19 pandemic. The decline was only uncovered after the chip shortage of 2021 that resulted from the severe supply chain disruption. Trends in the industry were analyzed from three perspectives: Industry 4.0, advances in materials, and the Post-pandemic era. As a result of the evolution of the fourth generation of industry (Industry 4.0), trends in semiconductor manufacturing include robotization, which caused the industry to become the largest market for industrial robotics since 2020, and an all-time peak globalization. The semiconductor industry is a very globalized industry with corporates from different parts of the world taking part in the production of the final product. Although some materials such as carbon and Gallium Nitride show promising trends to replace silicon as the material of choice. It will likely not be before two or three decades when a semiconductor material will be able to replace silicon. Challenges for the industry include the shortage of the trained-workforce, and the added inter-country restrictions that may hinder the globalization of the industry. © 2025 IEEE.

关键词： Semiconductor alloys

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Pulsed-Laser Testing to Evaluate Transient Dose Rate Effect on a Commercial-off-the-Shelf FPGA

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IEEE Transactions on nuclear Science 2025年

作者： Li, Yang Peng, Zhigang Guo, Yaxin Tang, Ge Li, Junlin Li, Ruibin Chen, Wei Xiao, Yao Li, Yonghong Li, Mo He, Chaohui Zhang, Guohe Xi’an Jiaotong University School of Microelectronics Xi’an710049 China Xi’an Jiaotong University School of Nuclear Science and Technology Xi’an710049 China Chengdu University of Technology College of Nuclear Technology and Automation Engineering Chengdu610059 China Northwest Institute of Nuclear Technology National Key Laboratory of Intense Pulsed Radiation Simulation and Effect Xi’an710024 China University of Electronic Science and Technology of China School of Electronic Science and Engineering Chengdu611731 China

To overcome the complexity and challenges of transient γ irradiation experiments, this paper adopted pulsed lasers to simulate the transient dose rate effect (TDRE) on a commercial off-the-shelf (COTS) field-programmable gate array (FPGA), taking advantage of good stability, low interference, high efficiency, and low cost. Three test programs were designed for the Virtex-5 XC5VSX95T FPGA, including one program used in previous transient γ irradiation experiments. Laser experiments involved a wide energy range, and recorded failure features of the device under test (DUT) and photocurrents on the power supplies. By comparing the results with transient γ irradiation experiments, it was demonstrated that pulsed lasers can be used to effectively simulate FPGA’s TDRE, showing consistent effect characteristics. Additionally, the sensitivity of the internal clock and logic resources of the FPGA was analyzed, finding that delaylocked loops (DLLs) have a high sensitivity and that disturbances in the logic resources could propagate. There are multiple factors affecting the internal sensitivities. Furthermore, like transient γ rays, high-intensity pulsed lasers would also induce dynamic reconfiguration of the FPGA, which was analyzed specifically. These research findings are important supplements to studying FPGA’s TDRE, and also demonstrate a significant prospect of using pulsed lasers to simulate the TDRE in very large-scale integrated (VLSI) circuits. © 1963-2012 IEEE.

关键词： Gamma rays

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