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IEEE Conference on Energy Internet and Energy System Integration (EI2)

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

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.

关键词： Photovoltaic systems Renewable energy sources Wind energy Systems operation System integration Demand response Particle swarm optimization

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Research on the method of explosion-hydraulic fracturing for hot dry rock used downhole robot

Research on the method of explosion-hydraulic fracturing for...

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ARMA-CUPB Geothermal International Conference 2019

作者： Liu, Qingyou Zhao, Jianguo Zhu, Haiyan Dong, Run State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of Technology Chengdu610059 China College of Energy Chengdu University of Technology Chengdu610059 China School of Mechatronic Engineering Southwest Petroleum University Chengdu610500 China College of the Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu610059 China

Hydraulic fracturing of hot and dry rock (HDR) usually produces a single main fracture. However, a single main crack is prone to produce "thermal short-circuit effect" in the heat transfer process, thus reducing the heat transfer efficiency. This will lead to the early abandonment of the HDR wells and restrict the development of the HDR resources. In view of the technical problems faced by the development of HDR resources, the idea of using downhole robots to implement blasting-hydraulic fracturing is put forward. The novel exploitation technology of the HDR resources can avoid the single main fracture caused by the in-situ stress, rock strength and natural fracture, and form a complex fracture network as far as possible, which can improve the thermal interaction area of the HDR and avoiding the "thermal short-circuit effect". Based on the novel exploitation technology of the HDR resources, the working mechanism of the downhole robot is studied. A prototype of the downhole robot and a special experimental bench and system are developed. On this basis, a series of the ground experiments such as static/dynamic experiments and control reliability of the downhole robot have been completed. Finally,the new exploitation technology of the HDR resources is of great scientific significance and engineering application prospects for the economic and efficient development of HDR resources. Copyright © ARMA-CUPB Geothermal International Conference *** rights reserved.

关键词： Fracture

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The Simultaneous Enhancement in the Strength and Plasticity of Crmnfeconi High-Entropy Alloy Via a Purification Mechanism

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SSRN 2023年

作者： Wu, Changgui Li, Jinfeng Qiu, Wenbin Lian, Fengjun Huang, Liufei Zhu, Jun Chen, Longqing College of Physics Sichuan University Sichuan Chengdu610065 China Insitute of Nuclear Science and Technology Sichuan University Sichuan Chengdu610042 China Institute of Materials China Academy of Engineering Physics Mianyang621907 China

In materials research, the bottleneck of balancing strength and ductility remains a tremendous challenge. Here, a purification mechanism is achieved in ductile face-centered cubic (FCC) CrMnFeCoNi high-entropy alloy (HEA) via proper contents of Y2O3 addition using a combination of ball milling, mixing powder, and laser melting deposition (LMD). It is found that a layer of slag is formed and adherent to the surface of the specimen for HEA, enabling the impurities in the matrix to be purified to the slag and reducing sensitivity to hot cracks. Correspondingly, as the co-contribution of a purification mechanism and grain refinement, the tensile strength and fracture elongation improved from 415MPa to 470Mpa and 50% to 79% for 0.3wt% Y2O3-added HEA, 415MPa to 480Mpa and 50% to 65% for 0.4wt% Y2O3-added HEA, respectively. This approach not only provides a fascinating route for designing HEAs to achieve simultaneous enhancement in strength and plasticity, but also has the potential to address the long-standing challenge of strength-ductility tradeoff in metallic materials more broadly. © 2023, The Authors. All rights reserved.

关键词： High-entropy alloys

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Multiscale microstructure-based constitutive modeling of high-temperature creep rupture in post-irradiated ODS steels

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Journal of Materials Research and technology 2025年 36卷 8037-8047页

作者： Xiaobao Fu Zhenyu Zhao Zeyuan Yan Yuntao Zhong Dengke Chen Ruiqian Zhang Bin Liu Qihong Fang Jia Li State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle College of Mechanical and Vehicle Engineering Hunan University Changsha 410082 PR China State Key Laboratory of Powder Metallurgy Central South University Changsha 410083 PR China Science and Technology on Reactor Fuel and Materials Laboratory Nuclear Power Institute of China Chengdu 610213 PR China Department of Engineering Mechanics School of Ocean and Civil Engineering Shanghai Jiao Tong University Shanghai 200240 PR China

Oxide dispersion strengthened (ODS) steel exhibits the great potential as structural materials in nuclear energy production, owing to the complex interface between the oxide particles and the matrix to enhance the resistance of radiation damage. However, the impact of irradiation-induced defects on the thermal creep rate and resistance of ODS steel currently remains inadequately understood. The point defect concentration with the increasing time is predicted, and the coarsening of oxide particles is quantitatively evaluated during the creep using the Ostwald ripening theory. Considering the irradiation-induced microstructure, a modified thermal creep rate model is proposed, and the thermal creep rate and creep strain of irradiated ODS steel are predicted at different temperatures. The results show that the thermal creep rate reaches 3 × 10 −5 s −1 at the temperature of 500 °C and stress of 200 MPa, while the thermal creep strain does not exceed 3 % at the temperature of 800 °C. The average size and number density of the irradiated ODS steel are 8.34 nm and 2.72 × 10 18 m −3 . Meanwhile, the effect of the activation energy on the thermal creep life is predicted at different temperatures. The thermal creep life is maintained in the higher temperature range, even exceeding 10,000 h at 600 °C for irradiated ODS steels. High temperature causes the increased dislocation activity, and the coarsened oxide particles effectively hinder dislocation motion, thereby maintaining structural stability. This work aims to shed light on the influence of post-irradiation microstructure on the thermal creep performance of irradiated ODS steels, ultimately leading to the improved prediction of creep life.

关键词： Irradiation Oxide dispersion strengthening Point defect Thermal creep rate

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A comprehensive study on Li_(4)Si_(1-x)Ti_(x)O_(4) ceramics for advanced tritium breeders

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Journal of Advanced Ceramics 2020年第5期9卷 629-640页

作者： Yichao GONG Lin LIU Jianqi QI Mao YANG Junjie LI Hailiang WANG Hao GUO Guojun ZHANG Tiecheng LU School of Materials Science&Engineering Xi’an University of TechnologyXi’an 710048China College of Physical Science and Technology Sichuan UniversityChengdu 610064China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China

Hetero-element doped lithium orthosilicates have been considered as advanced tritium breeders due to the superior *** this work,Li_(4)Si_(1-x)Ti_(x)O_(4) ceramics were prepared by proprietary hydrothermal process and multistage reactive *** reaction mechanism of Li_(4)Si_(1-x)Ti_(x)O_(4) was put *** and SEM analyses indicate that insertion of Ti leads to lattice expansion,which promotes the grain growth and changes the fracture *** compressive tests show that the crush load increases almost four times by increasing x from 0 to ***,the thermal conductivity and ionic conductivity are the best when x=0.05 and x=0.1,*** cycling stability of Li_(4)Si_(1-x)Ti_(x)O_(4) pebbles was further appraised through investigating the changes of microstructure and crush *** undergoing thermal cycling,the Li_(4)Si_(1-x)Ti_(x)O_(4) still show higher crush load compared with Li_(4)SiO_(4),despite Ti segregation in some *** x=0.05 sample exhibits excellent thermal cycling *** summary,proper amount of Ti doping can improve the crush load,thermal and ionic conductivity,and thermal cycling stability of Li_(4)SiO_(4).

关键词： tritium ceramic breeders Li_(4)Si_(1-x)Ti_(x)O_(4) solid solutions crush load conductivity thermal cycling

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Unraveling the Scc Behavior and Enhanced Creep Strength Mechanism of Afa Alloy in Supercritical Co2

SSRN

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SSRN 2024年

作者： Shu, Ming Cong, Shuo Zhou, Qin Guo, Xianglong Zhou, Qiyin Sun, Yongduo Wu, Songling Nuclear Power Institute of China Chengdu610213 China Institute of Nuclear and New Energy Technology Tsinghua University Beijing100084 China College of Energy Xiamen University Xiamen361102 China School of Nuclear Science and Engineering Shanghai Jiao Tong University No. 800 Dongchuan Road Shanghai200240 China

The oxide scale of 20Cr25Ni2.5Al AFA alloy formed under the coupling of stress and supercritical carbon dioxide (sCO2, 650 ℃ / 15 MPa) consisted of Fe3O4, Cr2O3, intergranular IOZs, but lacked a thin Al2O3 protective layer. The poor oxidation resistance resulted in significant CO2 penetration into the matrix and subsequent formation of Cr2O3, thereby hindering the initiation of Cr - rich σ phase beneath the oxide scale. This competition between internal oxidation and precipitation effectively reduced crack initiation and delayed the connection between SCC and creep cracks, thus significantly prolonging the creep lifetime in sCO2 compared to that in air. © 2024, The Authors. All rights reserved.

关键词： Oxidation resistance

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WiFi Localization Algorithm Based on Snake Optimization Algorithm to Optimize BP Neural Network

WiFi Localization Algorithm Based on Snake Optimization Algo...

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Image Processing, Computer Vision and Machine Learning (ICICML), International Conference on

作者： Kexiong Cheng Jiawei Zhang Shuangwen Tian Huan Liu Jiahua Gong Yuhao Xie School of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu China Inner Mongolia North Heavy Industry Group Co. Ltd Deputy Director of the Equipment Research Institute Inner Mongolia China Sichuan Anxin Kechuang Technology Co. Ltd Chengdu China School of Computer Science and Cyber Security(Oxford Brookes College) Chengdu University of Technology Chengdu China

ISBN: (纸本)9781665464697

The hottest area of indoor localization technology research right now is WiFi localization. This research provides a prediction model based on BP neural network, with the model’s weights and thresholds tuned using snake optimization technique, for the demand of WiFi location fingerprint indoor localization technology. The issues that BP neural network has with easy local optimum attainment, slow convergence, and weak interference immunity are resolved. The simulation is used to confirm the viability and efficiency of the indoor WiFi localization technology method.

关键词： Location awareness Uncertainty Image processing Neural networks Machine learning Interference Predictive models

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Scattering model of Ce3+–doped high gadolinium fluoro–oxide glass in scintillation progress

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Ceramics International 2025年第17期51卷 23367-23373页

作者： Hua, Zhehao Li, Weichang Qian, Sen Tao, Haizheng Chen, Danping Cai, Hua Han, Jifeng Huang, Feng Jia, Jinsheng Qiao, Xvsheng Ren, Jing Sun, Xin-Yuan Tang, Gao Yin, Shenghua Yuan, Huiping Zhang, Minghui State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan430070 China Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China China Building Materials Academy Beijing100024 China Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai201800 China Key Lab of Radiation Physics and Technology of MOE Sichuan University Chengdu610065 China Key Laboratory of Rare Earths Ganjiang Innovation Academy Chinese Academy of Sciences Ganzhou341003 China State Key Laboratory of Silicon and Advanced Semiconductor Materials & Department of Materials Science and Engineering Zhejiang University Hangzhou310027 China College of Physics and Optoelectronic Engineering Harbin Engineering University Harbin150001 China Department of Physics and Key Laboratory of Jiangxi Province for Special Optoelectronic Artificial Crystal Materials Jinggangshan University Ji'an343009 China College of Materials and Chemistry China Jiliang University Hangzhou310018 China Nuclear Instrument CO. LTD. Beĳing100176 China Beijing Glass Research Institute Beijing101111 China Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai201899 China

High density Gd2O3–GdF3–Al2O3–B2O3–SiO2–CeF3 (GFOx) glass scintillators with different dimensions were synthesized. The glasses have a ∼75 % transmittance in visible range with a cut off wavelength of 373 nm. With the dimension increases, the energy transfer efficiency of GFOx glasses decreases from 77.0 % to 28.3 %. And the photoluminescence quantum yield (PL QY) of all glasses exceeds 56 % with a maximum of 68.4 %. GFOx glass scintillators exhibit a X–ray excitation luminescence (XEL) spectrum in 300–600 nm, and the XEL intensity decreases with increasing dimension. Under γ–ray excitation, a scattering model was established based on the light yield and aspect ratio of the glasses. The accuracy of the model was verified by measurement of commercial BGO crystal. In GFOx glass scintillator system, the intrinsic light yield of at 10 mm thickness is 1318 ph/MeV, while light loss coefficient is −0.12. With the aspect ratio increases, the formation and transport efficiency of excitons improve due to a larger surface area and more interfaces, resulting in a faster rise time. Meanwhile, all glasses exhibit a double exponential decay, including a fast component (∼100 ns) and a slow component (∼520 ns), and shows same trend as the rise time. In addition, the photon collection efficiency of SiPM coupled with the glasses decreased from 96.2 % to 31.8 %. Because the scattered photons can hardly reach the SiPM due to poor actual light attenuation length. © 2025

关键词： Aspect ratio

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The Correlation Mechanism that Micro-Structure Parameters of ZnO Varistor to the Macroscopic Electrical Characteristics 4

The Correlation Mechanism that Micro-Structure Parameters of...

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4th IEEE International Conference on Electrical Materials and Power Equipment, ICEMPE 2023

作者： Meng, Pengfei Guo, Jingke Zhao, Long Lu, Wenhao Liu, Zheng Li, Shan Zhou, Kai Hu, Jun Sichuan University College of Electrical Engineering Chengdu China State Grid Corporatio of China State Grid Linyi Power Supply Company Linyi China Extra High Voltage Power Transmission Company of Csg High Voltage Technology Department Guangzhou China Northwest Institute of Nuclear Technology State Key Laboratory of Intense Pulsed Radiatio Simulation and Effect Xi'an China Tsinghua University State Key Laboratory of Control and Simulation of Power System and Generation Equipment Beijing China

ISBN: (纸本)9798350334678

As the core part of metal oxide arresters, ZnO varistor plays an important part in suppressing the overvoltage of power systems. With the development of UHV technology, the residual voltage and energy capacity of ZnO varistors have put forward higher requirements. The research is carried out from the perspective of material calculation, studied the correlation mechanism between micro-structure parameters and various macroscopic electrical characteristics of ZnO varistor based on Voronoi network. And the microstructure parameters such as grain size and size inhomogeneity were calculated and studied. The study simplified the optimization problem with multiple variates and objectives, into the one with two categories of variates and two categories of objectives. And then proposed specific strategies. The research provides important theoretical basis for improving the performance of ZnO varistors, and witch is of great significance for the design and manufacture of high-performance lightning arresters. © 2023 IEEE.

关键词： Microstructure

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Decentralized tracking control for high-speed train: A fully actuated system approach

Decentralized tracking control for high-speed train: A fully...

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Fully Actuated System Theory and Applications (CFASTA), Conference on

作者： Xudong Dong Wenjing Xi Jilie Zhang Huaguang Zhang Hongwei Zhang School of Information Science and Technology Southwest Jiaotong University Chengdu China College of Information Science and Engineering Northeastern University Shenyang Liaoning P. R. China School of Mechanical Engineering and Automation Harbin Institute of Technology Shenzhen Guangdong PR China

To implement a smoother automatic train operation (ATO) for high-speed train (HST), we investigates the classical tracking problem for the cascaded mass-point longitudinal model of HST with train schedule, which is subject to the constraints of speed and power. The most challenge is the existence of nonlinear coupler forces between front and rear cars. In this paper, we introduce the fully actuated system approaches to remove the coupler forces from the train dynamic model, and then the second-order full-actuation system is established for each car. Therefore the decentralized controller of the individual car can be easy to been designed. In addition, the sufficient conditions for the existence of the decentralized controller are given by a set of linear matrix inequalities (LMIs). Some simulation results show the effectiveness of the fully actuated system approaches, and then the control scheme ensures the consensus of the relative displacement and velocity of coupler.

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