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NUMERICAL SOLUTION TO SHAPE-CONTROL PROBLEMS OF WATER FLOW USING BEM-OPTIMIZATION METHOD

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Journal of Hydrodynamics 1993年第1期5卷 98-105页

作者： Jin, Zhongqing xu, weixin Chen, Xiqing Hohai Univ Nanjing China

In this paper,some engineering problems arising from hydraulics and the design of hy- draulic structures are proposed,in accordance with the viewpoint of cybernetics,as the shape-control problems for distributed parameter system(DPS),whose solution is obtained using BEM-Optimization *** a classical example,the problem of flow over a weir is converted first into a shape-con- trol problem,which is then converted into an optimization problem to be *** results show that the BEM-Optimization method is an efficient way to solve shape-control problems for DPS, which not only can avoid the tedious process of trial and error or iteration,but also has high accuracy and less CPU *** the problem of flow over a weir,the stream function,the free surface profile and the unknown flow-rate can be found simultaneously.

关键词： shape-control DPS inverse problem BEM optimization flow with free surface cavitation

ON THE THEORETICAL PREDICTION OF CAVITATION INCEPTION

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Journal of Hydrodynamics 1992年第1期4卷 74-82页

作者： Pan, Sensen xu, weixin Peng, Xiaoxing xu, Jie China Ship Scientific Research Centre Wuxi China

This paper presents a new prediction method called 'fuzzy prediction method', which is different from traditional bubble dynamics method and pressure parameters method. The idea and method of artificial intelligence technology are used to predict the cavitation inception. New prediction model consists of two predicting ways (analytic and empirical way) and one scale-effect gate. New prediction results are compared with the experiments of ITTC body, NSRDC body, Schiebe body, etc.. The results compared indicates that new prediction method is satisfactory and may be a very powerful tool to predict the cavitation.

关键词： Mathematical Techniques Fuzzy Sets

Multi-Scale Convolutional Gated Recurrent Unit Networks for Tool Wear Prediction in Smart Manufacturing

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Chinese Journal of Mechanical Engineering 2021年第3期34卷 130-145页

作者： weixin xu Huihui Miao Zhibin Zhao Jinxin Liu Chuang Sun Ruqiang Yan School of Mechanical Engineering Xi’an Jiaotong UniversityXi’an 710049China State Key Laboratory for Manufacturing Systems Engineering Xi’an Jiaotong UniversityXi’an 710049China

As an integrated application of modern information technologies and artificial intelligence,Prognostic and Health Management(PHM)is important for machine health *** of tool wear is one of the symbolic applications of PHM technology in modern manufacturing systems and *** this paper,a multi-scale Convolutional Gated Recurrent Unit network(MCGRU)is proposed to address raw sensory data for tool wear *** the bottom of MCGRU,six parallel and independent branches with different kernel sizes are designed to form a multi-scale convolutional neural network,which augments the adaptability to features of different time *** features of different scales extracted from raw data are then fed into a Deep Gated Recurrent Unit network to capture long-term dependencies and learn significant *** the top of the MCGRU,a fully connected layer and a regression layer are built for cutting tool wear *** case studies are performed to verify the capability and effectiveness of the proposed MCGRU network and results show that MCGRU outperforms several state-of-the-art baseline models.

关键词： Tool wear prediction Multi-scale Convolutional neural networks Gated recurrent unit

Key technologies and development trends of the soft abrasive flow finishing method

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2023年第12期24卷 1043-1064页

作者： Yunfeng TAN Yesha NI weixin xu Yuanshen XIE Lin LI Dapeng TAN Key Lab of E&M Ministry of Education&Zhejiang ProvinceZhejiang University of TechnologyHangzhou 310014China State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310058China Collaborative Innovation Center of High-end Laser Manufacturing Equipment Zhejiang Province&Ministry of EducationHangzhou 310014China

This paper reviews recent developments of the soft abrasive flow finishing(SAF)method in constraint *** multiphase fluid dynamics modeling,material removal mechanism,auxiliary strengthening finishing techniques,and observation of surface impact effects by abrasive particles and cavitation bubbles are presented in *** prospects and challenges are given for four aspects:thin-walled curved surfaces,biomedical functions,electronic information,and precise optical components.

关键词： Soft abrasive flow finishing(SAF) Dynamic modeling Material removal mechanism Processing optimization Strengthening finishing control technology

Offshore wind power in China:A potential solution to electricity transformation and carbon neutrality

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Fundamental Research 2024年第5期4卷 1206-1215页

作者： Xi Deng weixin xu Yifan xu Yingquan Shao Xiangyuan Wu Wenping Yuan Zhangcai Qin School of Atmospheric Sciences Key Laboratory of Tropical Atmosphere-Ocean System(Ministry of Education)Sun Yat-sen Universityand Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai 519000China Zhuhai National Climate Observatory Zhuhai 519000China

China is likely to lead global offshore wind power development,in the hope of transforming the coal-based electricity system and reducing greenhouse gas ***,the potential of power generation and emissions mitigation is largely unknown,and the contribution of offshore wind utilization to regional carbon neutrality needs to be further ***,we reveal that offshore wind energy resources are abundant in China,with an estimated power generation potential of about 17.5 PWh,more than doubling the current power consumption *** current utilization of offshore wind energy in China accounts for 21%of global overall capacity,the total share is still limited,supplying just 0.4%of national electricity needs(2019).With the increasing use of offshore wind,by 2050,the planned installation along China coast would be nearly five times as much as current(2019)global capacity,or 25 times of current national offshore wind power *** total CO_(2)emissions reduction in 2050 due to the decrease in coal use is projected to be 294.3 Tg CO_(2)-eq yr^(-1),equivalent to 20%of current emissions from coal-fired power in the coastal *** size of reduced emissions is higher than current CO_(2)emissions in about 90%of *** results highlight the important role of offshore wind power in upgrading the energy system and achieving carbon *** studies are encouraged to further explore technological,economic and institutional challenges facing offshore wind energy deployment and low-carbon energy system development.

关键词： Electricity system Emissions reduction Generation potential Greenhouse gas emissions Mitigation Wind energy

论古代中国的国家治理--探寻中华文化和中国精神的历史源头

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中共中央党校（国家行政学院）学报 2021年第6期25卷 5-13页

作者：徐伟新中共中央党校/国家行政学院北京海淀100091

习近平新时代中国特色社会主义思想是中华文化和中国精神的时代精华,实现了马克思主义中国化新的飞跃。中国现有的治理观念、治理机制、治理方法等很多方面,在中国历史上隐约可见。中国古代社会有丰富的国家治理的智慧,滋养着中国共产... 详细信息

习近平新时代中国特色社会主义思想是中华文化和中国精神的时代精华,实现了马克思主义中国化新的飞跃。中国现有的治理观念、治理机制、治理方法等很多方面,在中国历史上隐约可见。中国古代社会有丰富的国家治理的智慧,滋养着中国共产党的理论创新、制度创新。中国优秀传统文化所秉持的理想信念、价值理念、道德观念等,深刻地影响并沉淀于国家制度和国家治理体系的建设中。读懂今日之中国,唯有了解古代之中国。

关键词：国家治理中国传统文化思想理念政治制度

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中国式现代化的社会形态分析

中共中央党校（国家行政学院）学报 2023年第5期27卷 5-11页

作者：徐伟新浙江红船干部学院

中国式现代化是中国社会生产方式、制度体系、价值观念、文化心理等社会层面全面的、深层次的、整体性的变革。中国式现代化具有特殊规定性的政治社会形态、技术社会形态、经济社会形态和文化社会形态。这四大社会形态从深层结构、内在... 详细信息

中国式现代化是中国社会生产方式、制度体系、价值观念、文化心理等社会层面全面的、深层次的、整体性的变革。中国式现代化具有特殊规定性的政治社会形态、技术社会形态、经济社会形态和文化社会形态。这四大社会形态从深层结构、内在规定以及整体性关联等方面,制约和影响着中国式现代化的样貌及未来走向。

关键词：中国式现代化社会形态制度体系人民至上

区域医学检验中心物流系统建设和管理的要点解析

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中华检验医学杂志 2020年第11期43卷 1066-1070页

作者：徐炜新孙杰上海健康医学院附属嘉定区中心医院检验科上海201800

物流系统是区域医学检验中心建设过程中的关键一环,在其建设和运行管理中涵盖了基本硬件的配置标准、工作流程的设计和优化、突发事件的应急管理等多个方面。同时,物流系统的有效运行也是区域医学检验中心质量管理中的一个组成部分,其... 详细信息

物流系统是区域医学检验中心建设过程中的关键一环,在其建设和运行管理中涵盖了基本硬件的配置标准、工作流程的设计和优化、突发事件的应急管理等多个方面。同时,物流系统的有效运行也是区域医学检验中心质量管理中的一个组成部分,其建设过程中也应形成一套符合区域医学检验中心跨院运行模式特点的质量监管体系。鉴于区域医学检验中心物流系统的建设和管理尚未形成相应的国家或地方标准,本文分别从区域医学检验中心物流系统的建设标准、运行标准、质量控制标准等方面开展讨论,并就物流系统的建设现状进行了思考、分析和展望,旨在为区域医学检验中心物流系统的标准化建设和管理提供一定的参考。

关键词：区域医学检验中心物流系统医院设计和建设运行质量控制

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一部里镇志背后的故事

中国地方志 2007年第11期 56-57页

作者：徐维新江苏省苏州市五卅路148号16号楼苏州市地方志办公室 215006

清道光二十八年（1848），苏州有一部《元和唯亭志》付梓，共20卷，首1卷末1卷。这是一部里镇志，唯亭镇人沈小帆首创纂修，其子沈藻采承遗命续纂，“稿凡三易，阅十寒暑”，终于修成。书因镇在苏州府元和县境而命名，是一部私纂的志书... 详细信息

清道光二十八年（1848），苏州有一部《元和唯亭志》付梓，共20卷，首1卷末1卷。这是一部里镇志，唯亭镇人沈小帆首创纂修，其子沈藻采承遗命续纂，“稿凡三易，阅十寒暑”，终于修成。书因镇在苏州府元和县境而命名，是一部私纂的志书。方志中，那些不应官府之聘，仅以个人对乡里的感情，征文考献，搜罗旧闻，编纂而成的志书，是有别于官修志书的私家著述。

关键词：故事志书道光州府方志私家