检索结果-内蒙古大学图书馆

Snap-through path in a bistable dielectric elastomer actuator

Applied Mathematics and Mechanics(English Edition) 2022年第8期43卷 1159-1170页

作者： Wenjie SUN Wentao MA Fei ZHANG Wei HONG Bo LI School of Mechanical and Precision Instrument Engineering Xi’an University of TechnologyXi’an710048China State Key Laboratory for Strength and Vibration of Mechanical Structures and School of Aerospace Xi’an Jiaotong UniversityXi’an710049China State Key Laboratory for Manufacturing System Engineering Shaanxi Key Lab for Intelligent RobotsSchool of Mechanical EngineeringXi’an Jiaotong UniversityXi’an710049China Department of Mechanics and Aerospace Engineering Southern University of Science and TechnologyShenzhenGuangdong Province518055China

The dielectric elastomer(DE)has attracted significant attention due to its desired features,including large deformation,fast response,and high energy ***,for a DE actuator(DEA)utilizing a snap-through deformation mode,most existing theoretical models fail to predict its deformation *** paper develops a new finite element method(FEM)based on the three-parameter Gent-Gent model suitable for capturing strain-stiffening *** simulation results are verified by experiments,indicating that the FEM can accurately characterize the snap-through path of a *** method proposed in this paper provides theoretical guidance and inspiration for designing and applying DEs and bistable electroactive actuators.

关键词： dielectric elastomer actuator(DEA) snap-through bistable finite element method(FEM) strain-stiffening behavior

来源：评论

学校读者我要写书评

暂无评论

Robust N−k Security-constrained Optimal Power Flow Incorporating Preventive and Corrective Generation Dispatch to Improve Power system Reliability

引用

CSEE Journal of Power and Energy systems 2023年第1期9卷 351-364页

作者： Liping Huang Chun Sing Lai Zhuoli Zhao Guangya Yang Bang Zhong Loi Lei Lai School of Automation Guangdong University of TechnologyGuangzhou 510006China School of Automation Guangdong University of TechnologyGuangzhou 510006Chinaand also with the Department of Electronic and Electrical EngineeringBrunel University LondonLondonUB83PHUK Center for Electric Power System and Energy Department of Electrical EngineeringTechnical University of DenmarkKongens Lyngby 2800Demark Zhaoqing Power Supply Bureau Guangdong Power Grid CompanyChina Southern Power GridZhaoqing 526020China

As extreme weather events have become more frequent in recent years,improving the resilience and reliability of power systems has become an important area of *** this paper,a robust preventive-corrective security-constrained optimal power flow(RO-PCSCOPF)model is proposed to improve power system reliability under N−k *** the short-term emergency limit(STL)and the long-term operating limit(LTL)of the post-contingency power flow on the branch are *** with the existing robust corrective SCOPF model that only considers STL or LTL,the proposed ROPCSCOPF model can achieve a more reliable generation dispatch *** addition,this paper also summarizes and compares the solution methods for solving the N−k SCOPF *** computational efficiency of the classical Benders decomposition(BD)method,robust optimization(RO)method,and line outage distribution factor(LODF)method are investigated on the IEEE 24-bus Reliability Test system and 118-bus *** results show that the BD method has the worst computation *** RO method and the LODF method have comparable ***,the LODF method can only be used for the preventive SCOPF and not for the corrective *** RO method can be used for both.

关键词： Benders cut bender decomposition line outage distribution factor N−k security criterion optimal power flow power system reliability resilience robust optimization

来源：评论

学校读者我要写书评

暂无评论

Research and Application of Material Data for Digital Manufacturing

Research and Application of Material Data for Digital Manufa...

引用

2023 IEEE International Conference on Image Processing and Computer Applications, ICIPCA 2023

作者： Wang, Ganlong Zhang, Guoyin Wang, Jichang Chen, Jianxun Harbin Engineering University CSIC Information Technology Co. Ltd. Beijing China Harbin Engineering University Harbin China System General Department CSIC Information Technology Co. Ltd. Beijing China

ISBN: (纸本)9798350314670

The organization mode of 'headquarters and multi-factories' has been widely developed in manufacturing enterprises. Although the multi-production base model meets the needs of rapid business expansion, it puts forward higher requirements for enterprise management. The differences in cost accounting methods, planning methods, and operation modes of the factories under the headquarters lead to different production management organizations, purchasing organizations, and sales organizations. Because the basic materials are managed by the headquarters, each factory can only select the required materials from the headquarters material warehouse. Therefore, there is a phenomenon that the same item corresponds to multiple business views. In this paper, the full attribute management mode of material data is taken as the research object, and a full attribute management solution with material code and factory code as the unique identification is proposed. It provides the theoretical basis and practical guidance for the application and promotion of material data life cycle management in multi-factory mode. © 2023 IEEE.

关键词： Life cycle

来源：评论

学校读者我要写书评

暂无评论

Pneumonia Detection Using Gradient Boosting on Selected Features Extracted from DenseNet 7th

Pneumonia Detection Using Gradient Boosting on Selected Fea...

引用

7th International Conference on Intelligent Technologies, ICIT 2022

作者： Shukla, Shikhar Arya, K.V. Garg, Bharat Lezama, Pedro Department of CSE ABV - Indian Institute of Information Technology and Management Gwalior474015 India ECED Thapar Institute of Engineering and Technology Patiala147004 India Faculty of System Engineering Universidad Nacional Federico Villarreal Lima15088 Peru

ISBN: (纸本)9789819919116

A severe respiratory condition that affects our lungs is pneumonia. It restricts the patient’s oxygen intake and makes breathing difficult. Worldwide, pneumonia is a leading cause of death for children under the age of five. The World Health Organization lists pneumonia as one of the leading global causes of child fatalities. In our proposed model, the features are extracted from the chest radiograph images using a fine-tuned deep learning model, DenseNet-201. Then the extracted features from the DenseNet-201 undergo feature selection using a combination of the Binary Sine Cosine Algorithm(BSCA), which is paired with the Adaptive Beta Hill Climbing (A β HC) local search algorithm for selecting the optimal feature set from all the extracted features. The searching algorithm runs for multiple iterations and picks up the optimal feature set. Using the Gradient Boosting Classifier, the selected optimal features are then used to classify the images into two classes, "Pneumonia" and "Normal" Chest Radiograph images. The proposed model has an accuracy of 98.92% in predicting pneumonia using chest radiograph images. When compared with the previous research work conducted on the same dataset, it is clear that our model outperforms the current state-of-the-art model which had an accuracy of 98.81%. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Feature Selection

来源：评论

学校读者我要写书评

暂无评论

A review on non-isolated low-power DC-DC converter topologies with high output gain for solar photovoltaic system applications

引用

Clean Energy 2022年第4期6卷 557-572页

作者： Tole Sutikno Hendril Satrian Purnama Nuryono Satya Widodo Sanjeevikumar Padmanaban Mohd Rodhi Sahid Department of Electrical Engineering Industrial Technology FacultyUniversitas Ahmad Dahlan55191 YogyakartaIndonesia Embedded System and Power Electronics Research Group 55191 YogyakartaIndonesia CTiF Global Capsule Department of Business Development and TechnologyAarhus UniversityHerning 7400Denmark School of Electrical Engineering Faculty of EngineeringUniversiti Teknologi MalaysiaJohorMalaysia

The major challenges of the high-gain DC-DC boost converters are high-voltage stress on the switch,extreme duty ratio operation,diode reverse-recovery and converter efficiency *** are many topologies of high-gain converters that have been widely developed to overcome those problems,especially for solar photovoltaic(PV)power-system *** this paper,20 high-gain and low-power DC-DC converter topologies are selected from many topologies of available ***,seven prospective topologies with conversion ratios of>15 are thoroughly reviewed and *** selected topologies are:(i)voltage-multiplier cell,(ii)voltage doubler,(iii)coupled inductor,(iv)converter with a coupled inductor and switch capacitor,(v)converter with a switched inductor and switched capacitor,(vi)cascading techniques and(vii)voltage-lift *** topology has its advantages and disadvantages.A comparison of the seven topologies is provided in terms of the number of components,hardware complexity,maximum converter efficiency and voltage stress on the *** are presented in ***,in the future,it will be easier for researchers and policymakers to choose the right converter topologies and build them into solar PV systems based on their needs.

关键词： distributed energy and smart grid energy and environment energy system and policy solar

来源：评论

学校读者我要写书评

暂无评论

The influence of drag parameter on submerged vegetation flow simulation using a porous approach

引用

Journal of Hydrodynamics 2024年第4期36卷 796-801页

作者： Meng-yang Liu Yi-sen Wang Yi-qing Gong Shu-xia Wang College of Water Conservancy and Hydropower Engineering Hohai UniversityNanjing 210098China State Key Laboratory of Water Resources Engineering and Management Wuhan UniversityWuhan 430072China River Research Department Changjiang River Scientific Research InstituteWuhan 430010China Key Laboratory of Hydrologic-Cycle and Hydrodynamic-System of Ministry of Water Resources Hohai UniversityNanjing 210098China Institute of Water Science and Technology Hohai UniversityNanjing 210098China

In simulating vegetated flows using the porous approach,the reasonableness of the drag coefficient significantly impacts the calculation *** study employs large eddy simulation(LES)to quantitatively investigate the effect of drag parameters on key flow characteristics in submerged vegetated *** results indicate that changes in the drag coefficient significantly alter the velocity in the middle of the vegetation layer and near the water surface in the free-flow *** with longitudinal velocity,the drag coefficient has a more pronounced effect on the vertical distribution of Reynolds stress,especially its peak at the top of the vegetation *** porous approach can accurately reproduce the vertical distribution of longitudinal velocity and Reynolds stress,consistent with experimental measurements,only when shear-scale flow *** to the high-intensity secondary flow under moderate vegetation density,fluctuations in the drag coefficient have a more significant impact on the numerical results than in very dense ***,selecting the drag coefficient value should be done cautiously,especially in the absence of experimental measurements for validation.

关键词： Drag parameter large eddy simulation(LES) submerged vegetation secondary flow porous approach

来源：评论

学校读者我要写书评

暂无评论

Review of National Cybersecurity Policies: A Case Study on Asian Countries

Review of National Cybersecurity Policies: A Case Study on A...

引用

Humanitarian technology Conference (KHI-HTC), IEEE Karachi Section

作者： Hera Noor Dodo Khan Seelro Syed Abbas Ali Department of Computer Information System Engineering NED University of Engineering & Technology Karachi Pakistan Thar Institute of Engineering Science & Technology NED University of Engineering & Technology Karachi Pakistan

Accelerating the economic advantages of ICT is one of the finest methods for any nation to boost its economy. Due to the unique topography, governing laws, and cultural traditions of each nation, these colossal challenges must be confronted in each country. This comparative analysis aims to examine these aspects in further detail. To achieve the objectives of this study, research was conducted by collecting and analysing data from publicly accessible sources. This research compares Pakistan and other Asian countries’ cybersecurity legislation, regulations, CERTs (national computer emergency response teams), CIIPs (computer intrusion prevention programs), and cyber security training and awareness. Among forty-eight Asian countries, the study focus on comparative analysis of major neighboring (developed or developing) countries of Pakistan such as Japan, China, Turkey, Iraq, Saudi Arabia, UAE, Nepal, Iran, Malaysia, Jordan, India, and Bangladesh. Cyber security has not been a major concern in Pakistan for a very long time, perhaps due to the way the government operates and how slowly it adapts to new technology. Many Asian countries have only ever released one version of their national cyber security plan, whilst Pakistan has never released anything; some other Asian countries are also added in this group.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Evolutionary Multiobjective Feature Selection Assisted by Unselected Features 13

Evolutionary Multiobjective Feature Selection Assisted by Un...

引用

13th IEEE Congress on Evolutionary Computation, CEC 2024

作者： Duan, Xuan Liu, Songbai Ji, Junkai Li, Lingjie Lin, Qiuzhen Tan, Kay Chen College of Computer Science and Software Engineering Shenzhen University Shenzhen China Shenzhen University National Engineering Laboratory for Big Data System Computing Technology Shenzhen China Shenzhen China The Hong Kong Polytechnic University Department of Computing Hong Kong

ISBN: (纸本)9798350308365

To enhance the generalization of multi-objective feature selection (MOFS) in classification, this paper proposes an evolutionary multitasking algorithm, diverging from previous approaches that exclusively target selected features. The algorithm integrates information from both selected and unselected features, introducing a novel objective to minimize the accuracy of unselected features. This objective, combined with the goal of minimizing classification errors for selected features, forms an auxiliary MOFS task. The paper presents a dual-population evolutionary multitasking framework that synergizes the main MOFS task with the auxiliary task. A knowledge transfer mechanism, based on accuracy preferences, seamlessly shares insights from the auxiliary to the main task, aiming to identify improved Pareto feature subsets. Empirical results demonstrate the superior performance of several state-of-the-art multi-objective algorithms within this framework, highlighting significant improvements across diverse datasets. © 2024 IEEE.

关键词： Feature Selection

来源：评论

学校读者我要写书评

暂无评论

A Radar Signal Sorting Algorithm Based on Improved PRI Transform 7

A Radar Signal Sorting Algorithm Based on Improved PRI Trans...

引用

7th IEEE Information technology and Mechatronics engineering Conference, ITOEC 2023

作者： Sang, Xin He, Yonghua Li, Yonggang University of Aerospace Engineering Department of Electlonic and Optical Engineering Beijing China Key Lab. of Electron. Info. Equipment System Research for National Defense Science and Technology Beijing China

ISBN: (纸本)9798350334197

When the traditional PRI transform algorithm is used to sort jittered signals, the algorithm will fail when the jitter is greater than 5%, and the traditional PRI transform algorithm is not ideal for sorting sinusoidal pulse sequences, slip pulse sequences, and a mixture of these three pulse sequences. Based on this, the algorithm is improved on the basis of the traditional PRI transform algorithm, combined with the expertise learned. © 2023 IEEE.

关键词： Improved PRI Transformation Algorithm Traditional PRI Transformation Algorithm

来源：评论

学校读者我要写书评

暂无评论

Magnetic Microrobots Fabricated by Photopolymerization and Assembly

引用

Cyborg and Bionic systems 2023年第1期4卷 41-46页

作者： Xiyue Liang Yue Zhao Dan Liu Yan Deng Tatsuo Arai Masaru Kojima Xiaoming Liu Key Laboratory of Biomimetic Robots and Systems Ministry of EducationState Key Laboratory of Intelligent Control and Decision of Complex SystemBeijing Advanced Innovation Center for Intelligent Robots and Systemsand School of Mechatronical EngineeringBeijing Institute of TechnologyBeijing 100081China Center for Neuroscience and Biomedical Engineering The University of Electro-CommunicationsTokyo 182-8585Japan Department of Materials Engineering Science Osaka UniversityOsaka 560-8531Japan

Magnetic soft microrobots have great potential to access narrow spaces and conduct multiple tasks in the biomedical *** now,drug delivery,microsurgery,disease diagnosis,and dredging the blocked blood vessel have been realized by magnetic soft microrobots in vivo or in ***,as the tasks become more and more complex,more functional units have been embedded in the body of the developed magnetic *** magnetic soft microrobots with complex designed geometries,mechanisms,and magnetic orientation are now greatly challenging the fabrication of the magnetic *** this paper,we propose a new method combining photopolymerization and assembly for the fabrication of magnetic soft *** the micro-hand assembly system,magnetic modules with different shapes and materials are firstly arrayed with precise position and orientation ***,the developed photopolymerization system is employed to fix and link these modules with soft *** on the proposed fabrication method,3 kinds of soft magnetic microrobots were fabricated,and the fundamental locomotion was *** believe that the presented fabrication strategy could help accelerate the clinical application of magnetic microrobots.

关键词： Magnetic system precise

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：