检索结果-内蒙古大学图书馆

Effect of He/dpa ratio on bubble characteristics in Fe9Cr1.5W0.4Si F/M steel during irradiation and annealing

Journal of Materials Science & technology 2024年第30期197卷 17-24页

作者： Dewang Cui Kefei Pei Ziqi Cao Yipeng Li Yifan Ding Yuanming Li Shichao Liu Guang Ran College of Energy Xiamen UniversityXiamen361102China Science and Technology on Reactor System Design Technology Laboratory Chengdu610213China College of Chemistry and Chemical Engineering Xiamen UniversityXiamen361005China Fujian Provincial Nuclear Energy Engineering Technology Research Center Xiamen361102China Nuclear Power Institute of China Chengdu610213China

The He production rate(i.e.,He/dpa)in nuclear reactors strongly affects the degradation of material *** is an important but not yet fully understood ***,the effect of He/dpa on bubble char-acteristics in Fe9Cr1.5W0.4Si ferrite-martensitic(F/M)steel was in situ studied during 400 keV Fe^(+)and 30 keV He^(+)dual-beam irradiation at 723 K with three ratios of 100,500,and 2500 appm He/dpa and subsequent stepwise annealing using transmission electron microscopy(TEM).He/dpa strongly affected the bubble *** irradiation,the higher the He/dpa,the smaller the size of irradiated bubbles,but the higher their ***,He/dpa didn’t affect the final saturation size of irradiated bubbles for all three cases,which was-2.2 *** annealing,high He/dpa caused large,immobile,dense polyhedral bubbles with a wider bubble size distribution,while low He/dpa caused small,low-mobility,and relatively low-density spherical *** was found that the higher the He/dpa ratio,the greater the swelling during irradiation and annealing,and annealing further enhanced the ***,the tunnel structure was first found in body-centered cubic(BCC)F/M steel during in-situ *** current work provides valuable and potential insights for further understanding the He/dpa effects in materials serving in different nuclear reactors.

关键词： He effect Ferritic-martensitic steel He bubble Ion irradiation Annealing

来源：评论

学校读者我要写书评

暂无评论

Structural Design and Analysis of a Bionic Metacellular Robot Chassis 7

Structural Design and Analysis of a Bionic Metacellular Robo...

引用

2022 7th International Seminar on Computer technology, Mechanical and Electrical engineering, ISCME 2022

作者： Yang, Peijie Yang, Jian Yang, Jiaxin Liu, Li Peng, Yujie Chen, Jianwei Zhang, Bei Nie, Xuan Tian, Yingyu Sang, Ziyang School of Mechanical and Electrical Engineering Chengdu University of Technology China College of Nuclear Technology and Automation Engineering Chengdu University of Technology China

Aiming at the problems of lack of stability, poor adaptability, and weak load capacity of existing robots in complex environments. The corresponding adaptation methods are proposed through the analysis of various harsh environments in nature, and statistics are made. On this basis, a new type of metamorphic structure based on metamorphic theory and bionics principle is proposed, and the relevant mechanical structure of the chassis of the metamorphic robot is designed;The mechanical system and motion are designed, optimized, and analyzed by using Solidworks and MATLAB joint simulation platform;The motion planning and kinematics simulation of the bionic metamorphic robot chassis are carried out through ADAMS software;Stress simulation of loaded parts is carried out based on ANSYS. The results show that the design size and motion planning are reasonable and meet the bionic metamorphic robot chassis requirements for working environment and grasping operation. © Published under licence by IOP Publishing Ltd.

关键词： Bionics

来源：评论

学校读者我要写书评

暂无评论

A digital multi-channel system based on parallel full comparison baseline restoration method 4

A digital multi-channel system based on parallel full compar...

引用

4th International Conference on Electronic Information engineering and Computer Communication, EIECC 2024

作者： Liu, Yang Xu, Mingxing Wang, Guangxi Yang, Yufeng Chengdu University of Technology College of Nuclear Technology and Automation Engineering Cheng Du China Key Laboratory of Sichuan Province Chengdu University of Technology Cheng Du China

ISBN: (纸本)9798331534622

This paper designs a baseline estimation digital energy spectrum measurement system using a parallel full-comparison method, aimed at reducing the impact of baseline drift on the energy resolution of the digital energy spectrum measurement system. The system consists of two parts: an analog baseline adjustment circuit and a digital baseline estimation module. The digital module first performs baseline estimation, then transmits the results to the frontend circuit to adjust the baseline, thereby correcting drift caused by circuit noise and signal pulse stacking. The system is mainly composed of a DAC baseline adjustment circuit, an ADC sampling circuit, and an FPGA-based digital multi-channel analysis system, in which a parallel full-comparison mean baseline estimation method is deployed to calculate the baseline adjustment amount. To verify the reliability of the system, NaI detectors were used in this study, and the energy resolution and response of the system were tested using dual-source137Cs and60Co. The experimental results show that the linear response fitting of the digital multi-channel energy spectrum measurement system exceeds 99.99%. Under high counting rates, the energy resolution without baseline recovery was 8.83% (@0.662 keV), while the energy resolution with the parallel full-comparison baseline recovery method was 7.57% (@0.662 keV), improving by 0.92%. In conclusion, compared to the system without baseline recovery, the parallel full-comparison baseline recovery method effectively alleviates the baseline drift issue of the NaI detector under high counting rates, thereby improving the energy resolution of the system. © 2024 IEEE.

关键词： Velocity measurement

来源：评论

学校读者我要写书评

暂无评论

In-situ TEM study of the effect of hydrogen-helium ratio on defect characteristics in Fe9Cr1.5W0.4Si F/M steel during H_(2)^(+)&He^(+)simultaneous irradiation

引用

Journal of Materials Science & technology 2024年第6期173卷 192-201页

作者： Dewang Cui Ziqi Cao Kun He Yuanming Li Xi Qiu Guang Ran College of Energy Xiamen UniversityXiamen 361102China Fujian Provincial Nuclear Energy Engineering Technology Research Center Xiamen 361102China Science and Technology on Reactor Fuel and Materials Laboratory Chengdu 610041China Nuclear Power Institute of China Chengdu 610041China Science and Technology on Reactor System Design Technology Laboratory Chengdu 610041China

The effect of hydrogen and helium interaction,especially H-He ratio,on the irradiation behavior of nuclear materials has not yet been ***,this is an important basis for evaluating the irradiation properties of nuclear materials and developing high irradiation resistant ***,30 keV H_(2)^(+)and He^(+)dual beams with four H-He ratios of 0:10,3:10,15:10,and 30:10 were used to irradiate the newly developed Fe9Cr1.5W0.4Si F/M steel in TEM to in-situ study the interaction and ratio effect of hydrogen and *** addition of H atoms significantly promoted the nucleation of dislocation loops and *** the early stage of irradiation,the average size and density of dislocation loops increased with the increase of H-He ***,the larger the H-He ratio,the easier it was to form a complex dislocation ***,the final saturation size of bubbles increased with the increase of H-He *** was first found that the swelling was affected by H concentrations,with high H concentrations slowing down the increase in *** a certain irradiation dose,a specific H-He ratio would lead to a swelling peak of Fe9Cr1.5W0.4Si F/M *** super-sized bubbles at grain boundaries(GBs)were found after H addition,resulting in a bigger swelling of GBs than the *** the swelling of the GBs and the matrix show a dependence on the H-He *** current work is of great significance for understanding the interaction between hydrogen and helium in nuclear materials.

关键词： Dose ratio effect Ferritic-martensitic steel Hydrogen&helium synergetic irradiation In-situ TEM

来源：评论

学校读者我要写书评

暂无评论

Exploring the Performance Test of Smart Substation Auxiliary Control System Test Platform Based on B/S Architecture 4th

Exploring the Performance Test of Smart Substation Auxiliary...

引用

4th International Conference on Power and Electrical engineering, ICPEE 2023

作者： Feng, Fuyong Cai, Dongsheng Chang, Zhengwei Wu, Jie Bamisile, Olusola Huang, Qi The College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu China State Grid Sichuan Electric Power Company Electric Power Research Institute Chengdu China

ISBN: (纸本)9789819716739

Smart substation is an important infrastructure for the development of the power industry, in which the auxiliary control system plays a vital role, and the performance of the auxiliary control system of smart substations affects power security. Aiming at this problem, this paper uses the object-oriented programming language Java technology to develop a set of smart substation auxiliary control system test platforms based on the IEC61850 protocol, which is used for performance tests of auxiliary control system. By using Jmeter to simulate the multi-sensor data interaction test environment, the test platform tests the stability, response speed, and data processing capability of the auxiliary control system. The test data results indicate that the response time of the system is basically less than 80 ms, with a maximum deviation of only 10.05. The auxiliary control system testing platform designed in this article has shown satisfactory performance in different concurrent data interaction testing environments, providing a solid guarantee for the reliability and stability of the equipment. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Control systems

来源：评论

学校读者我要写书评

暂无评论

Super-resolution Localization Problem Based on the Mobile Scenario 7

Super-resolution Localization Problem Based on the Mobile Sc...

引用

2023 7th International Conference on Mechanics, Mathematics and Applied Physics, ICMMAP 2023

作者： Zhu, Ying Hao X.C., Wei X.Y., Jiang The College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu610059 China Chengdu University of Traditional Chinese Medicine China

Target positioning has always been a hot research topic in the field of sensors. In recent years, radar detection technology has become increasingly mature, resulting in a large number of radar sensors have begun to be used in traffic, security, medical and other fields for target detection. This paper mainly studies the super-resolution localization problem of FMCW FMCW in moving scenes. It analyzes the echo data by mathematical modeling to obtain the distance and angle information of the object to find the place of the object. To restore the motion trajectory of objects more realistically and achieve super-resolution positioning, a super-resolution radar positioning model based on Kriging interpolation based on the Fourier spectrum is established. By constructing a frame of intermediate frequency data Fourier spectrum tensor space, Fourier spectrum analysis is used to obtain the spectral characteristics of spatiotemporal changes when objects move. The Fourier spectrum surface is reasonably predicted through the statistical method - kriging interpolation. More Fourier spectrum information of objects in the time dimension can be obtained, and then more object points can be restored to achieve super-resolution positioning. This is widely used in the automotive field, which develops autonomous driving systems to help drivers better control the vehicle and reduce the probability of car accidents. © Published under licence by IOP Publishing Ltd.

关键词： Spectrum analysis

来源：评论

学校读者我要写书评

暂无评论

Real-Time Monitoring of Meteorological Data at In-Situ GCW Remediation Sites

引用

Journal of Geoscience and Environment Protection 2024年第9期12卷 152-166页

作者： Qinghai Wu Xiaofeng Yang Jun Liu Ruiqi Wang Quanyou Fu College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu China

To optimize the self-organization network, self-adaptation, real-time monitoring, remote management capability, and equipment reuse level of the meteorological station supporting the portable groundwater circulation wells, and to provide real-time and effective technical services and environmental data support for groundwater remediation, a real-time monitoring system design of the meteorological station supporting the portable groundwater circulation wells based on the existing equipment is proposed. A variety of environmental element information is collected and transmitted to the embedded web server by the intelligent weather transmitter, and then processed by the algorithm and stored internally, displayed locally, and published on the web. The system monitoring algorithm and user interface are designed in the CNWSCADA development environment to realize real-time processing and analysis of environmental data and monitoring, control, management, and maintenance of the system status. The PLC-controlled photovoltaic power generating panels and lithium battery packs are in line with the concept of energy saving and emission reduction, and at the same time, as an emergency power supply to guarantee the safety of equipment and data when the utility power fails to meet the requirements. The experiment proves that the system has the characteristics of remote control, real-time interaction, simple station deployment, reliable operation, convenient maintenance, and green environment protection, which is conducive to improving the comprehensive utilization efficiency of various types of environmental information and providing reliable data support, theoretical basis and guidance suggestions for the research of groundwater remediation technology and its disciplines, and the research and development of the movable groundwater cycling well monitoring system.

关键词： Groundwater Circulation Well Weather Station Real-Time Monitoring Embedded Web Server

来源：评论

学校读者我要写书评

暂无评论

Characteristics of sub-synchronous oscillation in grid-connected wind farm system

引用

Journal of Electronic Science and technology 2023年第4期21卷 91-101页

作者： Yan Gong Qi Huang Dong-Sheng Cai Bamisile Olusola Olorunfemi School of Mechanical and Electrical Engineering University of Electronic Science and Technology of ChinaChengdu611731China Southwest University of Science and Technology Mianyang621010China The College of Nuclear Technology and Automation Engineering Chengdu University of TechnologyChengdu610059China

With the rapid development of wind power, wind turbines are accompanied by a large quantity of power electronic converters connected to the grid, causing changes in the characteristics of the power system and leading to increasingly serious sub-synchronous oscillation (SSO) problems, which urgently require the generalized classification and characterization of the emerging oscillation problems. This paper classifies and characterizes the emerging types of SSO caused by grid-connected wind turbines to address these issues. Finally, the impact of the typical system parameters changes on the oscillation pattern is analyzed in depth to provide effective support for the subsequent suppression and prevention of SSO.

关键词： Characteristics Classification Sub-synchronous oscillation(SSO) Typical system parameters Wind farm

来源：评论

学校读者我要写书评

暂无评论

Study on Beam Trajectory Deflection and Spatial Dose Distribution in Magnetic Resonance-Guided Proton Therapy 23rd

Study on Beam Trajectory Deflection and Spatial Dose Distrib...

引用

23rd Pacific Basin nuclear Conference, PBNC 2022

作者： Ren, Xiao-Qing Wang, Ming Wang, Xin-Chen Li, Meng Li, Guo-Dong Zhang, Lei School of Nuclear Technology and Automation Engineering Chengdu University of Technology Sichuan Chengdu China

ISBN: (纸本)9789811988981

Proton therapy can significantly inhibit the radiation damage of additional tissues, which is the development trend of cancer radiotherapy. At present, the randomness of range fluctuation of proton beam in the body is a technical bottleneck that limits the high-precision dose distribution of proton therapy. The targeting accuracy of proton therapy for moving soft-tissue tumours is expected to greatly improve by real-time magnetic resonance imaging (MRI) guidance. However, the magnetic field introduced by MRI will affect the transmission trajectory of proton beam, and then cause the deposition dose distortion in the body. Therefore, it is necessary to accurately evaluate the beam deflection trajectory under the three-dimension magnetic field. In this paper, with the help of Monte Carlo code TOPAS, the proton beam trajectory deflection under different magnetic field parameters is carried out, and the calculation accuracy of the mathematical model is verified by Monte Carlo algorithm. Then, the trajectories of primary protons and secondary particles (consider electrons and secondary protons) under different magnetic field are investigated. Moreover, comparison diagram of dose distribution before and after correction is presented in the paper. The analysis results of this paper will provide data reference for the dose correction of later MRI guided proton therapy device. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Proton beams

来源：评论

学校读者我要写书评

暂无评论

A High-Precision Parameter Identification Method Based on Improved DFT for Sub-Super Synchronous Oscillations

A High-Precision Parameter Identification Method Based on Im...

引用

2024 IEEE IAS Industrial and Commercial Power System Asia, I and CPS Asia 2024

作者： Sun, Feiyu Cai, Dongsheng Zhang, Zhengyuan Huang, Qi The College of Nuclear Technology and Automation Engineering Chengdu University of Technology Chengdu China School of Mechanical and Electrical Engineering University of Electronic Science and Technology of China Chengdu China School of Information Engineering Southwest University of Science and Technology Mianyang China

ISBN: (纸本)9798350352290

Wind energy has been employed extensively as a renewable energy source with the aim of carbon neutrality. The power system also makes extensive use of power electronic properties and lead to the sub/super-synchronous oscillation (Sub/Sup-SO) issue, which damages equipment and jeopardizes the power system's ability to operate safely and steadily. To improve the frequency band estimation range to 100 Hz, this research use Phasor Measurement Unit (PMU) instantaneous value data to determine the Sub/Sup-SO associated characteristics. To reduce the influence of spectral leakage and the fence effect, as well as to improve the identification accuracy of the related parameters, this paper adopts the RV self-convolutional window based Discrete Fourier Transform (DFT) and the Hanning double-window based all-phase Fast Fourier Transform (apFFT) hybrid algorithm to identify the Sub/Sup-SO modal parameters. We take into account the identification accuracy in complex cases, such as non-nominal frequencies, with noise effects and multiple Sub/Sup-SO modes. The simulation results show that the proposed method has high discrimination bandwidth, high discrimination accuracy and strong flexibility. © 2024 IEEE.

关键词： Frequency estimation

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：