检索结果-内蒙古大学图书馆

Mechanism analysis of pitting induced by Al_(2)O_(3) inclusions: insight from simulation calculation

Journal of Iron and Steel Research International 2025年第4期32卷 1061-1072页

作者： Ting Wang Bi-jun Hua Xiang-jun Liu Pei-hong Yang Xiao-xia Shi Ji-chun Yang Li Zhou Chang-qiao Yang School of Rare Earth Industry Inner Mongolia University of Science and TechnologyBaotou014010Inner MongoliaChina School of Automation and Electrical Engineering Inner Mongolia University of Science and TechnologyBaotou014010Inner MongoliaChina Inner Mongolia Baotou Steel Union Co. Ltd.Baotou014010Inner MongoliaChina

The micro-area characterization experiments like scanning Kelvin probe force microscope(SKPFM)and Kernel average misorientation have the defects of complex sample preparation and occasional errors in test results,which makes it impossible to accurately and quickly analyze the pitting behavior induced by inclusions in some cases,prompting attempts to turn to simulation calculation *** method of calculating band structure and work function can be used to replace current-sensing atomic force microscopy and SKPFM to detect the potential and conductivity of the *** band structure results show that Al_(2)O_(3) inclusion is an insulator and non-conductive,and it will not form galvanic corrosion with the ***_(2)O_(3) inclusion does not dissolve because its work function is higher than that of the ***,the stress concentration of the matrix around the inclusion can be characterized by first-principles calculation coupled with finite element *** results show that the stress concentration degree of the matrix around Al_(2)O_(3) inclusion is serious,and the galvanic corrosion is formed between the high and the low stress concentration areas,which can be used to explain the reason of the pitting induced by Al_(2)O_(3) inclusions.

关键词： Pitting Inclusion phase identification First-principles calculation Phonopy Finite element analysis

来源：评论

学校读者我要写书评

暂无评论

Comparison of AC Loss Calculation Model for High Temperature Superconductor Strip

Comparison of AC Loss Calculation Model for High Temperature...

引用

2023 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2023

作者： Yang, Yan Fei Zhang, Zhen Yang Bo, Kai Chen, Jun Quan Wuhan University School of Electrical Engineering and Automation Wuhan430072 China Southeast University School of Electrical Engineering Nanjing210096 China Naval University of Engineering State Key Laboratory of Electromagnetic Energy Wuhan430043 China

ISBN: (纸本)9798350301571

The second-generation (2G) high temperature superconducting strips are increasingly used in superconducting motor, superconducting current limiters, etc. The accurate calculation of AC loss of the strips is of great significance for evaluating the thermal loss of the equipment. In this paper, the stainless-steel package superconducting strip is taken as the research object, and its full model and multilayer model are established based on H-formula and a general heat transfer equation. The difference of AC loss between the two models under different external magnetic field amplitude and frequency is compared and analyzed, and the impact of thermal coupling on AC loss is studied. It is found that the multilayer model has no difference with the full model in calculating AC loss under certain conditions. Thermal coupling is essential for accurately calculating the AC losses of superconducting strips, especially in cases of high amplitude and frequency. © 2023 IEEE.

关键词： AC loss electromagnetic numerical modeling thermal coupling

来源：评论

学校读者我要写书评

暂无评论

Pruning-Based Knowledge Transfer Method for Power System Scheduling 13

Pruning-Based Knowledge Transfer Method for Power System Sch...

引用

13th IEEE Data Driven Control and Learning Systems Conference, DDCLS 2024

作者： Yan, Zhen Tang, Hao Fang, Daohong Tan, Qi Wang, Song Wang, Tongwen School of Electrical Engineering and Automation Hefei University of Technology China State Grid Anhui Electric Power Co. Ltd China

ISBN: (纸本)9798350361674

In order to enhance the learning optimization efficiency of deep reinforcement learning algorithms in the scenario of unit shutdown and maintenance, this study delves into knowledge transfer issues arising from the reduction of target task state and action vector dimensions compared to the source task. A dimensionality reduction transfer method for deep reinforcement learning based on neural network pruning is proposed. Firstly, a method for calculating the information richness of neural network nodes is introduced, utilizing L1 norm and information entropy. Subsequently, guided by the richness of information, the significance of each neural network node in the source task to the target task is analyzed, enabling effective network pruning. Furthermore, a mapping relationship between the neural networks of the target task and the source task is established, facilitating the transfer of deep reinforcement learning network parameters. Finally, through numerical simulations, the effectiveness of the proposed method is validated by comparing the transfer effects of different transfer methods, pruning techniques, and pruning rates. © 2024 IEEE.

关键词： Deep reinforcement learning

来源：评论

学校读者我要写书评

暂无评论

Distributed Coordinated Optimal Dispatch of Multiple Virtual Power Plants under Non-cooperative Game Theory 16

Distributed Coordinated Optimal Dispatch of Multiple Virtual...

引用

16th IEEE PES Asia-Pacific Power and Energy engineering Conference, APPEEC 2024

作者： Chen, Xi Liu, Wei Xing, Xinran Wang, Yufei Wang, Xuechun Lu, Xintong School of Automation Nanjing University of Science and Technology Nanjing China College of Electrical Energy and Power Engineering Yangzhou University Yangzhou China

ISBN: (纸本)9798350386127

Aiming at the problem of multiple virtual power plants with many power regulation resources and high computational difficulty, as well as the power interaction and competition between different virtual power plants, this study proposes a distributed coordinated optimal dispatch strategy for multiple virtual power plants under non-cooperative game theory. The strategy considers the power fluctuation of photovoltaic(PV) units and the difficulty of load prediction, and applies the distributed model predictive control(DMPC) to the coordinated optimal dispatch of multiple virtual power plants. In addition, a non-cooperative game model of multiple virtual power plants is established to determine the inter-plant trading power based on the double auction bidding, considering the competitive relationship. The simulation results show that the operating economy of virtual power plants is improved after the adoption of non-cooperative game coordination, and each virtual power plant(VPP) can make full use of energy and formulate reasonable strategies according to its own conditions. © 2024 IEEE.

关键词： Virtual Power Plants

来源：评论

学校读者我要写书评

暂无评论

Numerical Solution of the M/NEMS Contact Problem Using an Improved Arc-Length Method 2

Numerical Solution of the M/NEMS Contact Problem Using an Im...

引用

2nd International Symposium on Control engineering and Robotics, ISCER 2023

作者： Shan, Zhicheng Du, Shuimiao School of Mechatronic Engineering and Automation of Shanghai University Shanghai China Sino-European School of Technology of Shanghai University Shanghai China

ISBN: (纸本)9798350336405

Reliability issue induced by nanoscale mechanical contact has been a fundamental bottleneck in mature commercialization of Micro/Nano Electromechanical System(M/NEMS). The key point of M/NEMS contact reliability analysis lies in accurate mathematical models and sophisticated numerical resolution methodologies are prominently used in today's research, which are far from being neither efficient, nor accurate because of the multi-instability induced by surface roughness and the non-convexity of the interaction potential. In this work, we proposed a self-adaptive version of the arc-length method-which is one of the most commonly used nonlinear solvers-to solve the M/NEMS contact problem. Numerical results showed that the improved method has superior performance in capturing localized microscale contact effect in comparison with the traditional one. As an application, the influence of the fringing field effect on the performance of M/NEMS is investigated by using the improved arc-length method. © 2023 IEEE.

关键词： Reliability analysis

来源：评论

学校读者我要写书评

暂无评论

Biological Random Dynamic Focusing Disparity Estimation Within Time-Sequence Images 2

Biological Random Dynamic Focusing Disparity Estimation With...

引用

2nd IEEE International Conference on Image Processing and Computer Applications, ICIPCA 2024

作者： Chen, Shijun Du, Juan Lin, Jie Tang, Yongchao Chen, Dawei Chen, Qiang Zhang, Zhijun Zhongxing Telecom Equipment Shenzhen518000 China School of Automation Science and Engineering South China University of Technology Guangzhou510000 China

ISBN: (纸本)9798350360240

In traditional computer stereo vision systems, a single focus is employed for capturing and processing stereo image pairs to estimate depth. However, the inherent variability of object distances in real world stereo images imposes limitations on this method, rendering it less reliable. To tackle this issue, a novel biological random dynamic focusing theory grounded in time-sequence images is proposed in this paper. In the proposed framework, the images of different focal points are captured according to the time sequence, the target is extracted and manipulated, ultimately yielding either a single focus or multi-focus image processing output depending on the application scenario. Moreover, a biological focusing disparity estimation algorithm is proposed and this theory is subsequently extended to the domain of disparity estimation, with its foundation rooted in the Semi Global Matching (SGM) algorithm. The disparity map obtained by this algorithm exhibits a more accurate disparity values and achieves a good balance between speed and accuracy. Experimental results on real world images demonstrate that our method enhanced robustness and flexibility compared to traditional methodologies. © 2024 IEEE.

关键词： Stereo vision

来源：评论

学校读者我要写书评

暂无评论

OPTIMIZATION METHOD OF AVIATION LITHIUM-ION BATTERY PACK BASED ON SP+ MODEL

OPTIMIZATION METHOD OF AVIATION LITHIUM-ION BATTERY PACK BAS...

引用

2024 CSAA/IET International Conference on Aircraft Utility Systems, AUS 2024

作者： Wang, Peng Zhang, Ning Liu, Liang Zhou, Wei Lyu, Chao AVIC Shenyang Aircraft Design and Research Institute Shenyang China School of Electrical Engineering and Automation Harbin Institute of Technology Harbin China

With the advancement of multi-electric aircraft technology and lithium-ion battery technology, lithium-ion batteries are commonly utlized in the aviation field. Apart from being used as emergency batteries, they are increasingly being employed as power batteries for aircraft. Due to the high demands of aircraft on characteristics such as weight and volume of lithium-ion battery packs, there is a need for optimization in their design. Utilizing model-based methods for optimization design can effectively reduce costs and shorten development cycles. Since the SP+ electrochemical model can accurately reflect the working mechanism of lithium-ion batteries and has characteristics such as high precision and simple computation, this paper adopts the SP+ model to construct a lithium-ion battery pack model and validates it. Simultaneously, taking typical electrical usage scenarios as examples, optimization design of aviation lithium-ion battery packs was carried out, achieving optimization of battery pack weight and volume. © The Institution of engineering & Technology 2024.

关键词： Lithium-ion batteries

来源：评论

学校读者我要写书评

暂无评论

INN: A Deep Correction Network for High-Dynamic Inertial Navigation 4

INN: A Deep Correction Network for High-Dynamic Inertial Nav...

引用

4th International Conference on Industrial automation, Robotics and Control engineering, IARCE 2024

作者： Gu, Tao Cong, Li Yang, Jing Guo, Yuzhu Wang, Lina School of Automation Science and Electrical Engineering Beihang University Beijing China School of Electronic Information Beihang University Engineering dept. Beijing China National Key Laboratory of Science and Technology on Aerospace Intelligence Control Beijing China

ISBN: (纸本)9798350380323

Inertial navigation has gained extensive application because it solely relies on built-in Inertial Measurement Unit (IMU) devices. Nevertheless, due to its inherent accumulative integral error, inertial navigation is often integrated with other external devices in practical situations, which unfortunately leads to unavoidable privacy breaches. To address these issues, an Inertial Navigation Neural Network (INN) is designed to generate high-precision position estimations without relying on any other auxiliary information. The INN model consists of attitude correction and velocity regression modules. The attitude module employs a convolutional network to correct the attitude information, and the obtained rotation matrices are then fed into a recurrent neural network to regress incremental velocities and produce high-precision positions. The proposed model is validated on the simulated trajectories based on the Precise Strapdown Inertial Navigation System (PSINS) toolbox. Experimental studies demonstrated that the proposed method has a significant corrective effect on high-dynamic strapdown inertial navigation settings. The accumulated position errors are an order of magnitude smaller than those of traditional track reckoning algorithms and achieved a comparable performance with integrated navigation. © 2024 IEEE.

关键词： Inertial navigation systems

来源：评论

学校读者我要写书评

暂无评论

ToMFIR and Auxiliary Signals based Active Incipient Fault Detection for Autonomous Underwater Vehicle Thrusters 43

ToMFIR and Auxiliary Signals based Active Incipient Fault De...

引用

43rd Chinese Control Conference, CCC 2024

作者： Zhu, Zefan Wu, Yunkai Zhou, Yang Zhu, Zhiyu Soh, YengChai Jiangsu University of Science and Technology College of Automation Zhenjiang212100 China Jiangsu University of Science and Technology School of Computer Science and Engineering Zhenjiang212100 China Nanyang Technological University School of Electrical and Electronic Engineering Singapore Singapore

ISBN: (纸本)9789887581581

This article proposes an active fault detection method combining the Total Measurable Fault Information Residual (ToMFIR) and auxiliary signals to address the incipient faults of autonomous underwater vehicle (AUV) thrusters. Firstly, the Takagi-Sugeno (T-S) fuzzy medelling of AUV dynamics is establised. Secondly, an auxiliary signal and redundant actuator module are introduced. The auxiliary signal is capable of amplifying the active ToMFIR in the event of a fault, while the redundant actuator ensures that the auxiliary signal does not interfere with the active ToMFIR in fault-free scenarios. Performance indicators and fixed thresholds are provided to assist in designing the parameters of the redundant actuator. This is done by maximizing the impact of the auxiliary signal on ToMFIR signals and minimizing any disturbances. Finally, simulation results demonstrate the effectiveness of the proposed method in improving the sensitivity for incipient faults in AUV propulsion systems. © 2024 Technical Committee on Control Theory, Chinese Association of automation.

关键词： Autonomous underwater vehicles

来源：评论

学校读者我要写书评

暂无评论

Adaptive Stabilization of a PVTOL Aircraft with Uncertainties Based on Controlled Lagrangians 41

Adaptive Stabilization of a PVTOL Aircraft with Uncertaintie...

引用

第41届中国控制会议

作者： Guanjun Chen Wei Huo The Seventh Research Division School of Automation Science and Electrical EngineeringBeihang University

ISBN: (数字)9789887581536

ISBN: (纸本)9781665482561

An adaptive stabilization control strategy based on controlled Lagrangians for an under-actuated planar vertical take-off and landing(PVTOL) aircraft with unknown model parameters is presented in this ***,considering the PVTOL aircraft with known model parameters,a stabilization controller designed by controlled Lagrangians is ***,by modifying it,an adaptive continuous feedback controller for stabilizing the aircraft with unknown model parameters and a related adaptive update laws for estimating the unknown parameter are ***,asymptotic stability of the closed-loop system is strictly *** simulation verifies the effectiveness of the proposed controller.

关键词： PVTOL Aircraft Adaptive Stabilization Controlled Lagrangians Parameter uncertainties

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：