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BALL: 作品数：669被引量：486H指数：8; 导出分析报告; 相关领域：文化科学更多>>; 相关作者：关振群林天军王成伟陈国栋高峻更多>>; 相关机构：大连理工大学上海交通大学北京服装学院中山大学附属第一医院更多>>; 相关期刊：更多>>; 相关基金：国家自然科学基金国家高技术研究发展计划国家教育部博士点基金国家科技重大专项更多>>

On the Ball: 《China Today》2025年第5期77-79,共3页HUANG YUHAO; Premier League coaches develop skills of Chinese PE teachers and coaches,bolstering people-to-people exchanges.; 关键词：COACHES SKILLS develop skills EXCHANGES FOOTBALL premier league coaches

Experimental validation and numerical analysis of temporary plugging ball transport dynamics in horizontal wellbore: 《Particuology》2025年第3期271-288,共18页Yang Li Di Wang Jiahao Wang Jingcheng Li Luoyun Liu; supported by the National Natural Science Foundation of China(Nos.52404052,51804268);the Open Project Program of the State Energy Center for Shale Oil Research and Development(No.33550000-22-ZC0613-0376).; This study explores the transport dynamics of temporary plugging balls in multi-cluster horizontal wellbores through a three-dimensional Computational Fluid Dynamics(CFD)model based on field dimensions.An experimental...; 关键词：Temporary plugging ball Transport dynamics CFD Hydraulic fracturing

Research Status of Short Process Forming Techniques for Brazing and Soldering Materials: 《稀有金属材料与工程》2025年第2期377-384,共8页Dong Bowen Shi Guangyuan Zhong Sujuan Dong Xian Cheng Yafang Long Weimin Zhang Guanxing; National Key Research and Development Program(2021YFB3401101)。; Short process forming techniques for brazing and soldering materials can shorten the process,improve product quality,and increase production efficiency,which has received much attention from welding researchers.This r...; 关键词：short process forming technique continuous casting atomization powder soldering ball rapid solidification amorphous filler metals

Distributed asynchronous double accelerated optimization for ethylene plant considering delays: 《Chinese Journal of Chemical Engineering》2025年第2期245-250,共6页Ting Wang Zhongmei Li Wenli Du; supported by National Key Research and Development Program of China(2022YFB3305900);National Natural Science Foundation of China(62394343,62394345);Major Science and Technology Projects of Longmen Laboratory(NO.LMZDXM202206);Shanghai Rising-Star Program under Grant 24QA2706100.; Considering the complexity of plant-wide optimization for large-scale industries, a distributed optimization framework to solve the profit optimization problem in ethylene whole process is proposed. To tackle the dela...; 关键词：Asynchronous distributed optimization Plant-wide optimization Heavy ball Nesterov Inequality constraints

马丘比丘与秘鲁黄金帝国: 《装饰》2024年第12期8-9,共2页; 秘鲁是一个令人惊叹的国度,其多彩而神秘的文化可追溯到1.4万多年前,沙漠上蚀刻着纳斯卡古代地理符号线条,高耸的山峰上隐藏着马丘比丘等神秘古城。在全世界,有许多人对印加土地上的多种文化和令人敬畏的景观感兴趣。此次展览由澳大利...; 关键词：澳大利亚博物馆马丘比丘查韦斯纳斯卡 BALL 秘鲁

Research and experimental analysis on precision degradation of BSM at low speed(I): theory analysis: 《High Technology Letters》2024年第4期356-369,共14页KONG Deshun GAO Xiangsheng LI Shilin LV Linbao; Supported by the National Natural Science Foundation of China(No.51575014,51505020);Key Foundation Project of China Academy of Railway Sciences(No.2021YJ200).; In the structure of double-nut ball-screw mechanism(BSM),the contact angle of the ball-screw determines the relative positional relationship between the balls and the screw as well as the nut.The contact angle is rela...; 关键词：ball-screw mechanism(BSM) contact angle sliding friction drag torque dy-namics model precision degradation

Calibration and Optimization Scheme of the Metal Ball of Weather Radar in Nanchang: 《Meteorological and Environmental Research》2024年第6期31-34,共4页Yi ZHANG Rui SU; Calibration of weather radar is a main means to ensure the performance and data accuracy of weather radar.In the past,the calibration method was the static instrument calibration method of weather radar,but the full-l...; 关键词：Weather radar Metal ball calibration CONCLUSION EXPERIENCE

DEM simulation and characterization of copper and iron powders fabricated by ball milling: 《Particuology》2024年第11期96-108,共13页Khulan Uranchimeg Battsetseg Jargalsaikhan Lee Sang Eui Heekyu Choi; supported by Changwon National University in 2023∼2024.; In this study,the particle morphology,and size changes in copper and iron powders were investigated by using a high-energy ball mill under the same experimental conditions.The particle sizes and morphologies of the po...; 关键词：Copper powder Iron powder Ball size Particle morphology Particle size

基于逐点修匀的Ball-IDW网格变形方法: 《计算机辅助设计与图形学学报》2024年第11期1833-1841,共9页黄浩宇昌继海曹杰付营建关振群; 国家重点研发计划(2020YFB1709403)。; 为了提高网格变形的效率,提出一种基于逐点修匀的反距离加权函数(IDW)插值网格变形方法(简称Ball-IDW方法).根据网格拓扑关系,以每个内部节点为中心构造子网格系统,将整体网格分解为多个局部子网格;通过在中心节点到子网格的边界上添加...; 关键词：网格变形反距离加权函数子网格径向基函数贪心算法修匀法

Numerical investigation on ball-sealers transport and diversion performance in shale gas horizontal well based on semi-resolved CFD-DEM: 《Particuology》2024年第10期137-153,共17页Yinjian Huang Jinzhou Zhao Lan Ren Ran Lin Jianfa Wu Cheng Shen Jianjun Wu Bing Li; supported by National Natural Science Foundation of China(grant No.U21B2071);Youth Program of National Natural Science Foundation of China(grant No.52104039);Science and Technology Cooperation Project of the CNPC-SWPU Innovation Alliance(grant No.2020CX030201).; In the staged multi-cluster fracturing of shale gas horizontal wells, ball sealers are used to ensure uniform fluid distribution among clusters, a strategy that is both cost-effective and operationally beneficial. Des...; 关键词：Gas shale Horizontal wells Ball sealer Semi-resolved CFD-DEM DIVERSION

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