检索结果-南通市图书馆

Optimal structural design for a certain near-space composite propeller of airship using adaptive region division blending model

引用

Chinese Journal of Aeronautics 2024年第5期37卷 301-316页

作者： Weigang AN Tianyu LIN shigen wang School of Aeronautics Northwestern Polytechnical UniversityXi’an 710072China

Near-space airship is a frontier and hotspot in current military research and development,and the near-space composite propeller is the key technology for its *** order to obtain higher aerodynamic efficiency at an altitude of 22 km,a certain near-space composite propeller is designed as a long and slender aerodynamic shape with a 10 m diameter,which brings many challenges to the composite structure *** initial design is obtained by the composite structure variable stiffness design method using based on fixed region division blending ***,it weighs 23.142 kg,exceeding the required 20 *** order to meet the structural design requirements of the propeller,a variable stiffness design method using the adaptive region division blending model is proposed in this *** with the methods using the fixed region division blending model,this method optimizes region division,stacking thickness and stacking sequence in a single level,considering the coupling effect among *** a more refined region division,this method can provide a more optimal design for composite tapered ***,to improve the efficiency of optimization subjected to manufacturing constraints,a hierarchical penalty function is proposed to quickly filter out the solutions that do not meet manufacturing *** above methods combined with a Genetic Algorithm(GA)using specific encoding are adopted to optimize the near-space composite *** optimal design of the structure weighs 18.831 kg,with all manufacturing constraints and all structural response constraints being *** with the initial design,the optimal design has a more refined region division,and achieves a weight reduction of 18.6%.This demonstrates that a refined region division can significantly improve the mechanical performance of the composite tapered structure.

关键词： Structural optimization Composite tapered structure Genetic algorithm Adaptive region division Manufacturing constraint Near-space composite propeller

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

中国式现代化进程中驻村第一书记作用机制研究——基于安徽实践

引用

滁州学院学报 2024年第3期26卷 82-86页

作者：王诗根李邦松滁州学院文学与传媒学院安徽滁州239000 中共滁州市委党校马克思主义基本理论教研室(党史党建教研室) 安徽滁州239000

在推进中国式现代化建设的进程中,驻村第一书记制度的实施对于推动全体人民共同富裕作出了重要贡献。安徽省作为驻村第一书记制度的首创地,应该进行深入总结与研究,进一步完善运行机制,使之在乡村振兴中更好发挥党建引领、乡村治理、产... 详细信息

在推进中国式现代化建设的进程中,驻村第一书记制度的实施对于推动全体人民共同富裕作出了重要贡献。安徽省作为驻村第一书记制度的首创地,应该进行深入总结与研究,进一步完善运行机制,使之在乡村振兴中更好发挥党建引领、乡村治理、产业发展等方面的独特作用,助力中国式现代化建设的安徽实践。

关键词：党建中国式现代化驻村第一书记安徽

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

试述陈云同志的党风党纪建设思想

引用

滁州学院学报 2005年第3期7卷 30-32页

作者：王诗根滁州学院党委宣传部安徽滁州239000

党风党纪建设作为党的建设的重要方面,陈云同志对此作了一系列战略性思考,提出了许多新思想、新观点,形成了较具特色的党风党纪建设思想。今天研究和领会陈云同志党风党纪建设思想,对于保持共产党员先进性本色,提高党的执政能力,全面推... 详细信息

党风党纪建设作为党的建设的重要方面,陈云同志对此作了一系列战略性思考,提出了许多新思想、新观点,形成了较具特色的党风党纪建设思想。今天研究和领会陈云同志党风党纪建设思想,对于保持共产党员先进性本色,提高党的执政能力,全面推进党的建设新的伟大工程,具有十分重要的现实指导意义。

关键词：陈云党风党纪思想作风纪律

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

裁剪和元分类器在分布式数据挖掘中的应用

引用

计算机应用与软件 2008年第8期25卷 138-140页

作者：王士根谢康林上海交通大学计算机科学与工程系上海200240

数据经常分布在不同的地方,需要的机器资源也随着数据量的增长按比例增长,但数据的增长往往快于机器资源和机器学习上的改进。描述了元学习的基本过程和几种组合元分类器的度量尺度。元学习能够改进可观测性和精度,但同时过度强大的元... 详细信息

数据经常分布在不同的地方,需要的机器资源也随着数据量的增长按比例增长,但数据的增长往往快于机器资源和机器学习上的改进。描述了元学习的基本过程和几种组合元分类器的度量尺度。元学习能够改进可观测性和精度,但同时过度强大的元学习技术也会导致冗余,低效甚至不精确的元分类器层次。分析这些方法的局限性并且提出了基于相异性的裁剪算法,证实了元学习和相关的裁剪方法的组合能取得相似的甚至更好的表现。

关键词：机器学习元学习基础学习者裁剪算法

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

用双柱塞销法测量单犁体阻力——一种测量单犁体阻力的新方法

引用

吉林工业大学学报 1988年第1期 56-65页

作者：胡世根王泓吉林工业大学农机工程学院

木文提出的用双柱塞销测量单犁体阻力的新方法特别适用于带有安全器的弯犁柱单犁体阻力测量,它完全不改变犁体原来工作状态,且成本低。借助计算机程序修正,可以大大降低对传感器安装精度的要求,并保证有一定的测量精度。

关键词：双柱塞销测量单犁体阻力

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

中国传统优秀文化融入大学生思想政治教育的支持体系研究

引用

锦州医科大学学报（社会科学版） 2018年第1期16卷 127-129页

作者：季璇王诗根马良滁州学院计算机与信息工程学院安徽滁州239000

习近平在北京大学师生座谈会上曾说过"中华文明绵延数千年,有其独特的价值体系。中华优秀传统文化已经成为中华民族的基因,植根在中国人内心,潜移默化影响着中国人的思想方式和行为方式"。大学生作为祖国未来发展的中坚力量,加强大学生... 详细信息

习近平在北京大学师生座谈会上曾说过"中华文明绵延数千年,有其独特的价值体系。中华优秀传统文化已经成为中华民族的基因,植根在中国人内心,潜移默化影响着中国人的思想方式和行为方式"。大学生作为祖国未来发展的中坚力量,加强大学生的思想政治教育关乎到国家的命运和民族的兴旺。但同时,随着市场经济的发展和互联网的广泛应用,当代大学生的人生观、价值观和世界观正面临着前所未有的冲击和影响,中国优秀的传统文化在高校大学生中的迷失也不得不引起我们的重视。

关键词：中国优秀传统文化大学生思想政治教育支持体系

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Fabrication and Characterization of Yarn-Based Temperature Sensor for Respiratory Monitoring

引用

Journal of Donghua University(English Edition) 2022年第6期39卷 527-532页

作者： BAI Yunfeng XIE Erxiang LI Qiao wang Xi DING Hao ZHU shigen College of Mechanical Engineering Donghua UniversityShanghai 201620China Engineering Research Center of Advanced Textile Machinery Ministry of EducationDonghua UniversityShanghai 201620China College of Textiles Donghua UniversityShanghai 201620China College of Information Science and Technology Donghua UniversityShanghai 201620China

The development of wearable technologies promotes the research of flexible *** is hoped that a flexible sensor can collect different physiological data,such as temperature and respiratory rate(RR).The temperature of the exhaled gas is generally higher than that in the air,and the periodic change of temperature is related to the respiratory *** this work,we use platinum fiber and spandex fiber to prepare yarn-based temperature sensor with high tensile performance through hollow spindle wrapping spinning *** the measurement,the sensitivity of the sensor can reach at least 3.18×10^(-3)℃^(-1).We use the sensor and ordinary fabric mask to prepare a sensor mask that can monitor human respiratory signals to explore the performance of the sensor in RR *** experimental results show that when measuring human RR,the yarn-based temperature sensor can accurately distinguish different respiratory states such as normal breathing,deep breathing,and rapid breathing while *** is suggested that yarn-based temperature sensors can be used in medical fields such as real-time respiratory detection and temperature measurement.

关键词： flexible sensor yarn-based temperature sensor sensing mask respiratory measurement

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Direct mask-free fabrication of patterned hierarchical graphene electrode for on-chip micro-supercapacitors

引用

Journal of Materials Science & Technology 2023年第12期143卷 12-19页

作者： Yaopeng Wu Jinghong Chen Wei Yuan Xiaoqing Zhang shigen Bai Yu Chen Bote Zhao Xuyang Wu Chun wang Honglin Huang Yong Tang Zhenping Wan Shiwei Zhang Yingxi Xie School of Mechanical and Automotive Engineering South China University of TechnologyGuangzhou 510640China Intelligent Perception Institute Zhejiang LabHangzhou 311100China School of Environment and Energy South China University of TechnologyGuangzhou 510006China

Graphene-based electrodes with rational structural design have shown extraordinary prospect for en-hanced electrical double-layer capacitance of micro-supercapacitors(MSCs).Herein,a facile fabrication method for flexible planar MSCs based on hierarchical graphene was demonstrated by using a laser-treated membrane for electrode patterning,complemented with hierarchical electrode configuration tak-ing full advantages of size-determined functional *** in-plane interdigital shape of MSCs was defined through vacuum filtration with the assistance of the functionalized polypropylene(PP)*** hierarchical graphene films were built by macroscopic assembly based on size effect of differ-ent lateral sized graphene sheets(rGO-LSL).The sample of MSCs based on rGO-L SL(MSCs-LSL)exhibited excellent volumetric capacitance of 6.7 F cm^(−3) and high energy density of 0.37 mWh cm−*** MSCs-LSL presented superb flexibility and cycling stability with no capacitance deteroriated after 2000 *** newly developed fabrication strategy is of good scalability and designability to manufacture flexible elec-trode for MSCs with customized shapes,while the construction of hierarchical graphene can enlighten the structural design of analogous two-dimensional materials for potential advanced electronics.

关键词： On-chip micro-supercapacitors Mask-free fabrication Macroscopic assembly Patterned graphene film Hierarchical structure

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Protection-enveloped Automatic Train Operation: A Virtual Parameter Adaptation-based Finite-time Control Approach

Protection-enveloped Automatic Train Operation: A Virtual Pa...

引用

第三十九届中国控制会议

作者： Chen Wu shigen Gao Hongwei wang Tao Tang State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University National Research Center of Railway Safety Assessment Beijing Jiaotong University School of Electronic and Information Engineering Beijing Jiaotong University

Automatic train operation（ATO） is a key technology to ensure the operation safety and efficiency for trains instead of drivers. By operation safety, it is meant that the state of trains, including actual position and velocity, output by ATO, are always kept under the constrained ones imposed by automatic train protection（ATP）, resulting in a protection-enveloped ATO subsystem. This paper propose a finite-time control method for automatic train operation via a novel virtual parameter adaptation technique. Threefold features of proposed method are: i), it is guaranteed that the output tracking errors with respect to target running curve are always kept between protection-enveloped related prescribed performance bounds, ii), after a finite time, the position and velocity tracking error will remain in the neighborhood of zero, and iii), the novel virtual parameter adaptation technique is capable of dealing with the uncertainty in train dynamic model and complex environments. By Lyapunov stability analysis and finite time theory, all close-loop signals are kept bounded in finite-time. The effectiveness of proposed control method is demonstrated by numerical simulations.

关键词： Automatic train operation virtual parameter adaptation finite-time control protection-enveloped control prescribed performance control

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

A Nonlinear Feedback Adaptive Control Method for Improving the Control Performance of Automatic Train Operation

A Nonlinear Feedback Adaptive Control Method for Improving t...

引用

第37届中国控制会议

作者： shigen Gao Hairong Dong Bin Ning Hongwei wang State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University National Research Center of Railway Safety Assessment Beijing Jiaotong University

Automatic train operation technique has gone through developments and advances in urban railways for decades of years in China, which is now a mature technique that frees the train driver from continuous operation during the running process. With respect to the main line railways and high-speed railways, demonstration project and tentative endeavors have been conducted, which are designed to fully exert the capacities of Chinese Train Control System Level 2 and 3（CTCS-2/3）systems. This paper addresses a nonlinear feedback adaptive control method for improving the tracking control performance of automatic train operation, the feature of the proposed method is that the implemented control gains and learning rates of adaptation laws adjust automatically along with the varying tracking performance during the operation process, which is realized by a well-constructed continuous differentiable nonlinear feedback function. The proposed method requires no prior precise information of the operational resistances, and both theoretical analysis and comparative results demonstrate the effectiveness of the proposed method.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

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

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

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

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

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：