检索结果-南通市图书馆

Fifth International Conference on Surface engineering

作者： W.J.Xu1 J.B.Meng1 J.C.Fang2.X.Y.wang1 W.Q.Song1 Z.G.li1 1 Key Laboratory for Precision and Non-traditional Machining {2. of Ministry of Education Dalian University of {2. Dalian 11602. china 2.college of mechanical engineering and Automation Huaqiao University Quanzhou 362.2. china

Sheet metals are generally coated by slushing oils for temporary corrosion protection or by lubricants for friction reduction during metal-forming *** organic coatings have to be removed before further surface finishing of the metal *** with other conventional cleaning methods including mechanical cleaning,wet chemicals cleaning and ultrasonic cleaning,atmospheric pressure plasma arc cleaning has its own character and advantage such as high energy density,high cleaning quality,low cost and so *** to analyzing the principle of atmospheric pressure plasma arc cleaning metal surface,the model of heat and mass transfer is put forward with using transient-state heat transfer equation about interior heat source and Arrhenius equation of chemical reaction kinetics *** finite volume method the one dimensional control differential equation is transformed into discrete control equation,which is calculated numerically and analyzed with the using of implicit *** the lubricant is taken as an example,in which the effective power of plasma arc is 2.0 W,the diameter of nozzle is 2.mm,the flow rate of argon is 1 L/min,the working current of plasma arc is 2. A,the arc scanning velocity is 3-12.mm/s,and the lubricant density is 0.99 g/*** temperature distribution and density variation of cleaned coatings on metal surface,the result indicates that the temperature of coatings has a strong effect on its removal rate which improves with increasing temperature and plays a key role in the process of plasma arc cleaning,furthermore,the lubricant temperature depends on the energy balance at the workpiece surface exposed to the plasma *** order to avoid damaging the wokpiece surface owing to higher temperature and ensure removal rate of the coatings,there exists optimal temperature under the given experimental conditions.

关键词： Plasma Arc Cleaning Heat and Mass Transfer Finite Volume Method Numerical Computation

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

一种精确海缆铠装钢丝几何建模法探讨

引用

武汉理工大学学报 2009年第15期31卷 80-83页

作者：周学军王瑛剑伍先俊李兢海军工程大学电子工程学院武汉430033 武汉理工大学机电工程学院武汉430070

海缆钢丝铠装缠绕呈复杂的空间形状,正确建立海缆铠装三维模型是对其进行有限元分析的必要前续步骤。针对在建立有限元模型中的一些错误作法,文章在三维空间几何变换和数学推导的基础上,研究发现铠装钢丝在空间缠绕时在海缆横截面呈非... 详细信息

海缆钢丝铠装缠绕呈复杂的空间形状,正确建立海缆铠装三维模型是对其进行有限元分析的必要前续步骤。针对在建立有限元模型中的一些错误作法,文章在三维空间几何变换和数学推导的基础上,研究发现铠装钢丝在空间缠绕时在海缆横截面呈非椭圆形状,给出缠绕钢丝横截面和轴剖面的正确数学表达式,同时给出了在指定缠绕半径、钢丝半径下最多缠绕铠装钢丝根数的计算方法,给出了在指定缠绕半径、铠装钢丝半径和铠装钢丝根数条件下的捻角计算方法。

关键词：海缆建模有限元

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

Physicochemical characterization of Dendrobium officinale polysaccharides and regulation of immunometabolic homeostasis in Sub-health mice based on the CD4-Th17/Treg immunity axis

引用

Food Science and Human Wellness 2024年

作者： Bo li Ze-Hua Zhang Hao-Ru Guan Xing-li-Shang He Ning {2. Ying-Jie Dong Mei Rong Jiu-Jie Jia Ting-Ting Chen Zhi-Yuan li Gui-Yuan Lv lin-Nan Zhang Su-Hong Chen Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals， zhejiang University of technology zhejiang Provincial Key Laboratory of TCM for Innovative R & D and Digital Intelligent Manufacturing of TCM Great Health Products.Huzhou college of Pharmaceutical Science， zhejiang Chinese Medical University

The aim of this study was to investigate the role of DOPS and DOPS100 in attenuating immune dysfunction in subfertile mice. The results of the study revealed several noteworthy findings. First， DOPS and DOPS100 treatments led to significant improvement in weight gain and reversal of fatigue-related behaviors compared to the normal group. Second， both DOPS and DOPS100 showed effectiveness in reducing immune organ swelling， modulating immunoglobulin （IgA and IgM） levels， and restoring complement （C3c and C4） levels. In addition， they demonstrated a significant ability to enhance the integrity of the intestinal mechanical barrier by differentially upregulating the tight junction proteins Occludin and ZO-1. In addition， it was found that DOPS100 specifically enhanced the CD4+-Th17/Treg immune axis in the gut， as evidenced by increased expression of Foxp3 as well as decreased expression of RORγt， and further modulation of IL-10， IL-2.， and IL-17A expression levels of inflammatory factors. These findings collectively suggest that DOPS100 holds significant potential in improving sub-healthy status by repairing the intestinal barrier， restoring local immune homeostasis， and activating the intestinal immune regulatory network. The study's outcomes provide valuable insights into the therapeutic implications of DOPS and DOPS100 in addressing immune dysfunction in sub-healthy conditions.

关键词：

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

Measurement of solar pp neutrino flux using electron recoil data from PandaX-4T commissioning run

引用

Chinese Physics C 2024年第9期48卷 1-7,300页

作者： Xiaoying Lu Abdusalam Abdukerim Zihao Bo Wei Chen Xun Chen Yunhua Chen Chen Cheng Zhaokan Cheng Xiangyi Cui Yingjie Fan Deqing Fang lisheng Geng Karl Giboni Xuyuan Guo Chencheng Han Ke Han Changda He Jinrong He Di Huang Junting Huang Zhou Huang Ruquan Hou Yu Hou Xiangdong Ji Yonglin Ju Chenxiang li Jiafu li Mingchuan li Shuaijie li Tao li Qing lin Jianglai liu Congcong Lu lingyin Luo Yunyang Luo Wenbo Ma Yugang Ma Yajun Mao Yue Meng Xuyang Ning Binyu Pang Ningchun Qi Zhicheng Qian Xiangxiang Ren Nasir Shaheed Xiaofeng Shang Xiyuan Shao Guofang Shen Manbin Shen lin Si Wenliang Sun Yi Tao Anqing {12. Meng {12. Qiuhong {12. Shaobo {12. Siguang {12. Wei {12. Xiuli {12. Xu {12. Zhou {12. Yuehuan Wei Mengmeng Wu Weihao Wu Yuan Wu Mengjiao Xiao Xiang Xiao Kaizhi Xiong Binbin Yan Xiyu Yan Yong Yang Chunxu Yu Ying Yuan Zhe Yuan Youhui Yun Xinning Zeng Minzhen Zhang Peng Zhang Shibo Zhang Shu Zhang Tao Zhang Wei Zhang Yang Zhang Yingxin Zhang Yuanyuan Zhang li Zhao Jifang Zhou Ning Zhou Xiaopeng Zhou Yubo Zhou Zhizhen Zhou Research Center for Particle Science and technology Institute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao 266237China Key Laboratory of Particle Physics and Particle Irradiation of Ministry of Education Shandong UniversityQingdao 266237China School of Physics and Astronomy Shanghai Jiao Tong UniversityKey Laboratory for Particle Astrophysics and Cosmology(MoE)Shanghai Key Laboratory for Particle Physics and CosmologyShanghai 200240China New Cornerstone Science Laboratory Tsung-Dao Lee InstituteShanghai Jiao Tong UniversityShanghai 200240China Shanghai Jiao Tong University Sichuan Research Institute Chengdu 610213China Jinping Deep Underground Frontier Science and Dark Matter Key Laboratory of Sichuan Province Liangshan 615000China Yalong River Hydropower Development Company Ltd.288 Shuanglin RoadChengdu 610051China School of Physics Sun Yat-Sen UniversityGuangzhou 510275China Sino-French Institute of Nuclear engineering and technology Sun Yat-Sen UniversityZhuhai 519082China Department of Physics Yantai UniversityYantai 264005China Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China School of Physics Beihang UniversityBeijing 102206China Beijing Key Laboratory of Advanced Nuclear Materials and Physics Beihang UniversityBeijing 102206China Peng Huanwu Collaborative Center for Research and Education Beihang UniversityBeijing 100191China Southern Center for Nuclear-Science Theory(SCNT) Institute of Modern PhysicsChinese Academy of SciencesHuizhou 516000China School of mechanical engineering Shanghai Jiao Tong UniversityShanghai 200240China Department of Physics University of MarylandCollege ParkMaryland 20742USA State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China School of Physics Peking UniversityBeijing 100871Ch

The proton-proton(pp)fusion chain dominates the neutrino production in the *** uncertainty of the predicted pp neutrino flux is at the sub-percent level,whereas that of the best measurement is O(10%).In this study,for the first time,we measure solar pp neutrinos in the electron recoil energy range from 2. to 144 keV using the PandaX-4T commissioning data with 0.63 tonne×year *** pp neutrino flux is determined as(8.0±3.9(stat)±10.0(syst))×1010 s^(-1)cm^(-2.,which is consistent with the Standard Solar Model and existing measurements,corresponding to an upper flux limit of 2..3×10^(10)s^(-1)cm^(-2.at 90%C.L..

关键词： solar pp neutrino flux PandaX-4T electron recoil spectrum

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

地源热泵小负荷状态下的运行优化

引用

太阳能学报 2003年第5期24卷 713-717页

作者：李炳熙王永镖姜宝成小原申哉哈尔滨工业大学能源科学与工程学院哈尔滨150001 占小牧高等专科学校

针对地源热泵在小负荷状态下满负荷间歇运行,系统频繁启动造成额外消耗大量能量的缺点,本文利用最优化原理,对系统运行优化。优化计算得出对于每一个热负荷都存在一个最优运行负荷(即最优值),使得该系统运行能耗最低;在热容量和散热量... 详细信息

针对地源热泵在小负荷状态下满负荷间歇运行,系统频繁启动造成额外消耗大量能量的缺点,本文利用最优化原理,对系统运行优化。优化计算得出对于每一个热负荷都存在一个最优运行负荷(即最优值),使得该系统运行能耗最低;在热容量和散热量与最大散热量比值组成的二维空间中可以分成几个运行区域,在这些小区域中,最优值恒定不变。

关键词：地源热泵小负荷运行优化最优值

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

mechanical Properties and Thermal Shock Resistance of SrAl_(2.Si_(2.O_(8) Reinforced BN Ceramic Composites

引用

无机材料学报 2024年第10期39卷 1182-1188页

作者： wang Bo CAI Delong ZHU Qishuai li Daxin YANG Zhihua DUAN Xiaoming li Yanan wang Xuan JIA Dechang ZHOU Yu International Joint Laboratory of Advanced Nanomaterials of Heilongjiang Province College of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001China Key Laboratory of Advanced Structural-Functional Integration Materials School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150001China china Resources Cement technology R&D Co. LtdGuangzhou 510000China The First Military Representative Office of the Army Equipment Department in Beijing Beijing 100072China The Fourth System Design Department Fourth AcademyChina Aerospace Science and Industry Corporation LimitedBeijing 100048China School of Materials Science and engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055China

Hexagonal boron nitride(h-BN)ceramics have become exceptional materials for heat-resistant components in hypersonic vehicles,owing to their superior thermal stability and excellent dielectric ***,their densification during sintering still poses challenges for researchers,and their mechanical properties are rather *** this study,SrAl_(2.Si_(2.O_(8)(SAS),with low melting point and high strength,was introduced into the h-BN ceramics to facilitate the sintering and reinforce the strength and ***,BN-SAS ceramic composites were fabricated via hot press sintering using h-BN,SrCO_(3),Al_(2.O_(3),and SiO_(2. as raw materials,and effects of sintering pressure on their microstructure,mechanical property,and thermal property were *** thermal shock resistance of BN-SAS ceramic composites was *** show that phases of as-preparedBN-SAS ceramic composites are h-BN and h-SrAl_(2.Si_(2.O_(8).With the increase of sintering pressure,the composites’densities increase,and the mechanical properties shew a rising trend followed by a slight *** a sintering pressure of 2. MPa,their bending strength and fracture toughness are(138±4)MPa and(1.84±0.05)MPa·m^(1/2.,*** sintered at 10 MPa exhibit a low coefficient of thermal expansion,with an average of 2.96×10^(-6) K^(-1) in the temperature range from 2.0 to 12.0℃.The BN-SAS ceramic composites prepared at 2. MPa display higher thermal conductivity from 12.42.to 2..42.W·m^(-1)·K^(-1) within the temperature range from room temperature to 1000℃.Notably,BN-SAS composites exhibit remarkable thermal shock resistance,with residual bending strength peaking and subsequently declining sharply under a thermal shock temperature difference ranging from 600 to 1400℃.The maximum residual bending strength is recorded at a temperature difference of 800℃,with a residual strength retention rate of 101%.As the thermal shock temperature difference increase,the degree of oxida

关键词： BN matrix composite hot-press sintering mechanical property thermal shock resistance service reliability

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

Interface construction of NiCo LDH/NiCoS based on the 2. ultrathin nanosheet towards oxygen evolution reaction

引用

Nano Research 2022年第6期15卷 4986-4995页

作者： Jiahui li lili wang Haojia He yiquan Chen Zirui Gao Na Ma Bing wang linlin Zheng Rulin li Yujia Wei Junqing Xu Yao Xu Bowen Cheng Zhen Yin Ding Ma State Key Laboratory of Separation Membranes and Membrane Processes School of ChemistryTiangong UniversityTianjin 300387China School of Chemical engineering and technology Tiangong UniversityTianjin 300387China Beijing National Laboratory for Molecular Sciences College of Chemistry and Molecular Engineering and College of Engineeringand BIC-ESATPeking UniversityBeijing 100871China college of Chemical engineering and Materials Science Tianjin University of Science and TechnologyTianjin 300457China china Tianchen engineering Corporation Tianjin 300400China

Carbon-free hydrogen as a promising clean energy source can be produced with electrocatalysts via water *** evolution reaction(OER)as anodic reaction determines the overall efficiency of water electrolysis due to sluggish OER ***,it’s much desirable to explore the efficient and earth-abundant transition-metal-based OER electrocatalysts with high current density and superior stability for industrial alkaline ***,we demonstrate a significant enhancement of OER kinetics with the hybrid electrocatalyst arrays in alkaline via judiciously combining earth-abundant and ultrathin NiCo-based layered double hydroxide(NiCo LDH)nanosheets with nickel cobalt sulfides(NiCoS)with a facile metal-organic framework(MOF)-template-involved surface sulfidation *** obtained NiCo LDH/NiCoS hybrid arrays exhibits an extremely low OER overpotential of 308 mV at 100 mA·cm^(−2.,378 mV at 2.0 mA·cm^(−2.and 472.mV at 400 mA·cm^(−2.in 1 M KOH solution,respectively.A much low Tafel slope of 48 mV·dec^(−1)can be ***,with the current density from 50 to 2.0 mA·cm^(−2.,the NiCo-LDH/NiCoS hybrid arrays can run for 2. h without any *** results demonstrate that the construction of hybrid arrays with abundant interfaces of NiCo LDH/NiCoS can facilitate OER kinetics via possible modulation of binding energy of O-containing intermediates in alkaline *** present work would pave the way for the development of lowcost and efficient OER catalysts and industrial application of water alkaline electrolyzers.

关键词： oxygen evolution reaction hybrid structure ultrathin nanosheet layered double hydroxide surface sulfidation interface of NiCo LDH/NiCoS

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

聚结构件形式对管式油水分离器油出口含油率的影响

引用

化学工业与工程 2024年第1期41卷 136-143页

作者：李权林茹亭王宗勇王超沈阳化工大学机械与动力工程学院沈阳110142

为了对比不同结构形式聚结构件对管式油水分离器油出口含油率的影响规律,为工程设计选型提供技术支持,通过CFD方法分析了正V形斜板、倒V形斜板、传统斜板和蛇形背向折板4种不同聚结构件作用下的浓度场和油出口含油率,并探究了正V形聚结... 详细信息

为了对比不同结构形式聚结构件对管式油水分离器油出口含油率的影响规律,为工程设计选型提供技术支持,通过CFD方法分析了正V形斜板、倒V形斜板、传统斜板和蛇形背向折板4种不同聚结构件作用下的浓度场和油出口含油率,并探究了正V形聚结构件在单一条件下的最适宜结构参数。结果表明,在所研究的流速(0.05~0.35 m·s^(-1))内,4种聚结构件中正V形构件具有最好的油出口含油率,蛇形背向折板与倒V形斜板位列第2.3位,传统斜板最低;随着进口流速的增大,4种聚结构件油出口含油率均相应降低,其中传统斜板下降速度最快,正V形斜板与蛇形背向折板下降最慢,相差不大,而倒V形斜板下降速度居中;利用控制变量法确定了正V形构件与壁面间距C=10 mm、水平夹角θ=60°时油出口含油率最高。

关键词：聚结构件重力式分离器数值模拟油水分离油出口含油率

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

Stability and Control of Network Congestion Control System

Stability and Control of Network Congestion Control System

引用

2.09中国控制与决策会议

作者： Tao li~1,lingyun Wu~1,Feng liu~2.Yanwu wang~3,Chengjun Yang~4,Wu Zhang~5 1.college of Electronics and Information,Yangtze University,Jingzhou 43402.,china 2.Faculty of mechanical and Electronic Information engineering,china University of Geosciences, Wuhan 430074,china 3.Department of Control Science and engineering,Huazhong University of science and technology, Wuhan 430074.china 4.Sichuan Logging Company Jiangbei District,Chongqing 40002.,china 5.Producing and running department,No.2.production plant,Kelamayi 834008,china

＜正＞Network congestion control system can loss stabilities caused by bifurcations and chaos.A hybrid control method is presented for controlling bifurcations and chaos to stabilize network congestion control system ... 详细信息

关键词： Stability Control Network congestion control system Bifurcations Chaos

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

高低温下高性能环氧胶黏剂的制备

引用

建筑材料学报 2024年第6期27卷 559-564页

作者：李传习高有为王孝耀李游司睹英胡长沙理工大学土木工程学院湖南长沙410114 广西大学土木建筑工程学院广西南宁530005 湖南工业大学土木工程学院湖南株洲412007

基于团队已研发的胶黏剂配比,制备了一种适用于钢桥加固用的高性能结构胶黏剂,研究了纳米SiO_(2.掺量、缩胺105固化剂与聚醚胺D2.0固化剂的混掺比例及固化时间对胶黏剂室温性能的影响,并探讨了胶黏剂在不同工作温度下的力学性能.结果表... 详细信息

基于团队已研发的胶黏剂配比,制备了一种适用于钢桥加固用的高性能结构胶黏剂,研究了纳米SiO_(2.掺量、缩胺105固化剂与聚醚胺D2.0固化剂的混掺比例及固化时间对胶黏剂室温性能的影响,并探讨了胶黏剂在不同工作温度下的力学性能.结果表明:当纳米SiO_(2.掺量为0.75%,缩胺105固化剂与聚醚胺D2.0固化剂的质量比为1∶2.固化制度为90℃下固化2.5 h时,胶黏剂的室温力学性能最佳,并且在低温(-2.℃)和高温(70℃)下均能保持良好的力学性能.

关键词：纳米材料高低温固化时间高性能环氧胶黏剂力学性能

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

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：