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Quasi-static Analysis of Thrust-loaded Angular Contact Ball Bearings Part Ⅱ:Results and Discussion

Chinese Journal of Mechanical Engineering 2012年第1期25卷 81-87页

作者： CHEN Wenhua1,2,MA Zikui1,GAO Liang1,LI Xinglin3.and PAN Jun2 1 institute of Mechanical Design,Zhejiang University,Hangzhou 3.0027,china 2 institute of Mechanical Design and Manufacturing,Zhejiang Sci-Tech University,Hangzhou 3.0018,china 3.State Testing Laboratory of Hangzhou Bearing Test & Research Center,Hangzhou 3.0022,china 1. institute of Mechanical Design Zhejiang University Hangzhou 310027 China 2. institute of Mechanical Design and Manufacturing Zhejiang Sci-Tech University Hangzhou 310018 China 3. State Testing Laboratory of Hangzhou Bearing Test & Research Center Hangzhou 310022 China

Ball bearings are widely employed mechanical components characterized by high precision and quality,and usually play important roles in various rotary machines and *** advanced applications require a deep understanding of their various kinematic and tribological characteristics that are essential to predict the fatigue endurance,relieve the vibration and minimize the power dissipation of ball bearings in particular *** angular contact ball bearing under a specified operating condition is simulated with the quasi-static/creepage analytical model proposed in the preceding *** results demonstrate that the ball bearing is a statically determinate *** the balls spin on both inner and outer races means the ball is controlled by neither the inner nor the outer *** friction between the ball and raceway renders the inner and outer contact angles *** larger the coefficient of friction is,the larger the angle *** tangential traction perpendicular to the rolling direction due to the spin induces a gyro-like rotation of the ball with respect to the raceway even if no inertial effects are *** tangential elastic compliance of contacting surfaces gives rise to locked areas within the contact patch and transforms the sliding lines from circles into *** differential slip due to the close conformity of the ball and raceway makes the sliding and traction distributions asymmetric,which will influence the location of the spinning center of the ball with respect to the *** quasi-static/creepage model can be used to reveal the operating behaviors of ball bearings running under steady conditions and to optimize the design of ball bearings for specific applications.

关键词： ball bearing quasi-static creepage differential slip tangential elastic compliance

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南方大斑蝥酸水解-丙酮提取物化学成分的GC-MS分析

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中国药房 2009年第30期20卷 2358-2360页

作者：张建辉陈建伟武露凌李祥南京中医药大学药学院南京市210046 江苏省方剂研究重点实验室南京市210046 江苏省体育科学研究所南京市210014 江苏省中药炮制重点实验室南京市210029

目的:分析南方大斑蝥酸水解-丙酮提取物的化学成分。方法:色谱柱为HP-5(3.m×0.25mm×0.25μm),载气为氦气,流速为1.0mL·min-1,进样口温度为240℃,程序升温,以峰面积归一化法测定各成分相对含量。结果:共分离鉴定出28种化学成分,其含... 详细信息

目的:分析南方大斑蝥酸水解-丙酮提取物的化学成分。方法:色谱柱为HP-5(3.m×0.25mm×0.25μm),载气为氦气,流速为1.0mL·min-1,进样口温度为240℃,程序升温,以峰面积归一化法测定各成分相对含量。结果:共分离鉴定出28种化学成分,其含量占总提取物含量的91.997%。其中,斑蝥素占14.091%;其次是不饱和脂肪酸,占13.748%。结论:本方法可为南方大斑蝥的质量控制提供依据。

关键词：南方大斑蝥斑蝥素脂肪酸气相色谱-质谱联用法成分分析

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Effects of Different Nutrient Solution Concentration on the Growth and Development of Cucumber in Greenhouse

Effects of Different Nutrient Solution Concentration on the ...

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2011 International Conference on New Technology of Agricultural Engineering(ICAE 2011)

作者： Ma Wanzheng Key Laboratory of Modern Agricultural Equipment and Technology Ministry of Education&jiangsu Province jiangsu University Zhenjiang china Hu Jing 1 Key Laboratory of Modern Agricultural Equipment and Technology Ministry of Education&jiangsu Province jiangsu University Zhenjiang china Mao Hanping Key Laboratory of Modern Agricultural Equipment and Technology Ministry of Education&jiangsu Province jiangsu University Zhenjiang china Ni Jiheng Key Laboratory of Modern Agricultural Equipment and Technology Ministry of Education&jiangsu Province jiangsu University Zhenjiang china Li Zhongfang institute of Technology Anhui Science and Technology University Fengyang china

Cucumber is one of the major crops in the *** concentration of nutrient solution,which determines the development of various organs of cucumber,plays an important role in the yield,thus finding the optimal concentration of nutrient solution is theoretically significant for cultivating greenhouse *** this experiment,bags of perlite were used as the carrier of nutrient solution which used the Hoagland *** were four treatments T1 1:200 T2 1:100 T3.1:50 T4 1:*** of different fertilization treatments on height,dry matter of each organ and fruit quality of greenhouse cucumber were *** results showed that,by comparing four treatments,T3.was superior to other treatments in dry matter of various organs and fruit quality of greenhouse cucumber,with no nutrient stress on *** a result,T3.is the optimal fertilization way for soilless culture of greenhouse cucumber.

关键词： Greenhouse Cucumber Nutrient solution Concentration Fertilization Dry matter Yield

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Formation and migration of space charge packet in low density polyethylene

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Science china(Technological Sciences) 2005年第3期48卷 354-360页

作者： ZHENG Feihu 1 , ZHANG Yewen 1 , GONG Bin 1 , ZHU Jianwei 1 & WU Changshun 2 1. Pohl institute of Solid State Physics, Tongji University, Shanghai 200092, china 2. china National Center for {3. Supervision and Test of Electric Ware and Cable, Shanghai 200093. china 1. Pohl institute of Solid State Physics Tongji University 200092 Shanghai China 2. china National Center for quality Supervision and Test of Electric Ware and Cable 200093 Shanghai China

Pressure wave propagation (PWP) method was utilized to observe the space charges packet-like behavior in sheet samples of low-density polyethylene (LDPE) under the relative low electric field. The experimental results show that space charge packets are always generated at the anode and move across the sample to the cathode regardless of the polarity of DC voltage. This paper discusses the migration of space charge packets at 3.–40°C, the possible charge resource of space charge packets carriers and trap level of the space charge.

关键词： solid dielectric,low-density polyethylene,space charge packet,trap.

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电磁实时追踪系统质控实践指南

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中华放射肿瘤学杂志 2024年第2期33卷 93-102页

作者：国家癌症中心/国家肿瘤质控中心何侠不详江苏省肿瘤医院/江苏省肿瘤防治研究所/南京医科大学附属肿瘤医院放疗科南京210009

个体化、精准化放射治疗时代对肿瘤运动管理提出了更高的要求,电磁实时追踪系统即为有代表性的肿瘤运动管理技术。该技术涉及的人员、流程较多,质量控制也不同于一般的放射治疗质控实践,因此制定了本质控实践指南。本指南为开展电磁实... 详细信息

个体化、精准化放射治疗时代对肿瘤运动管理提出了更高的要求,电磁实时追踪系统即为有代表性的肿瘤运动管理技术。该技术涉及的人员、流程较多,质量控制也不同于一般的放射治疗质控实践,因此制定了本质控实践指南。本指南为开展电磁实时追踪系统的机构提供组织、人员、设备、技术流程及文档记录等方面的质量控制标准,内容涵盖系统介绍、适应证选择及患者宣教、信标转发器植入流程及质控、日检、月检和文档记录。基于本指南,可以满足电磁实时追踪系统质控实践的各项标准要求。

关键词：放射疗法电磁实时追踪运动管理立体定向放射疗法质量控制

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人·文化·教育

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江苏教育学院学报（社会科学版） 2009年第6期25卷 1-4页

作者：刘守旗江苏省教育科学研究院江苏教育学院江苏南京210013

人是一种文化的存在,人化即文化。文化是人与动物的分水岭,也是人之为人的根本特征和标志;文化力的高低,不仅是衡量一个国家综合实力的重要标志,也是衡量个体发展水平的重要尺度;重视文化和教育是全面建设小康社会、实现中华民族伟大复... 详细信息

人是一种文化的存在,人化即文化。文化是人与动物的分水岭,也是人之为人的根本特征和标志;文化力的高低,不仅是衡量一个国家综合实力的重要标志,也是衡量个体发展水平的重要尺度;重视文化和教育是全面建设小康社会、实现中华民族伟大复兴的需要,是教育的重要使命,也是落实"以人为本"思想的重要体现。

关键词：人文化以人为本

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Influence of the impounding process of the Three Gorges Reservoir up to water level 172.5m on water eutrophication in the Xiangxi Bay

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Science china(Technological Sciences) 2010年第4期53卷 1114-1125页

作者： YANG ZhengJian1,LIU DeFu1,JI DaoBin1,2 & XIAO ShangBin1,3.1 College of Civil & Hydroelectric Engineering,china Three Gorges University,Yichang 443.02,china 2 School of Water Resources & Hydropower Engineering,Wuhan University,Wuhan 43.072,china 3.{3. of Earth Environment,Chinese Academy of Sciences,Xi’an 710075,china 1. College of Civil & Hydroelectric Engineering China Three Gorges University Yichang 443002 China2. School of Water Resources & Hydropower Engineering Wuhan University Wuhan 430072 China3. Institute of Earth Environment Chinese Academy of Sciences Xi’an 710075 China

The water level of the Three Gorges Reservoir(TGR) rose to 172.5 m in two stages from September to November,*** hydrodynamic parameters and water quality parameters(*** velocity,temperature,turbidity and nutrient content) had been continuously monitored to reveal the influence of the impounding process of the TGR on the water eutrophication in the Xiangxi Bay(XXB).The maximal daily rise of the water level of the TGR was about 2.3. *** water exchange between the mainstream(the Changjiang River) and the XXB of the TGR was enhanced by density current,and its main characteristics were a density-stratified flow in different *** water exchange reduced the differences of the water quality parameters(for example,temperature,turbidity,nutrient level,pH,etc.) between the mainstream and the XXB during the impounding ***,the water stability index in the mainstream remained small but it was lowered in the *** main causes included the dilution by water of lower concentration of the chlorophyll a(Chl.a) entering from the mainstream,the decline of the water stability,and the increase of suspended silt,which induced the Chl.a to decrease in the XXB during the impounding *** grade of the water eutrophication changed from middle eutrophic level to mesotrophic state in the ***,as available nutrients were imported into the XXB from the mainstream during the impounding process the risk of water eutrophication increases in the XXB in the future.

关键词： impounding density current eutrophication the Xiangxi Bay the Three Gorges Reservoir

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quality Assessment of Concrete Blocks Exposed in Nature for Eighty Years

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china Ocean Engineering 1992年第4期7卷 455-470页

作者： Hu Yuchu , Wu Shaozhang Lu Liyun Senior Engineer, nanjing Hydraulic Research institute, 210029 nanjing Professor and Senior Engineer, nanjing Hydraulic Research institute, 210029 nanjing Assistant Engineer, nanjing Hydraulic Research institute, 210029 nanjing nanjing Hydraulic Research institute 210029 Nanjing China China

The concrete blocks used on a jetty in Shanghai were made in 1909 and 1910. Having been exposed in nature for 80 years, now there are 4600 pieces of blocks left on the jetty. Comprehensive inspections, such as external appearance examination, core-drilling of concrete blocks, ultrasonic detection, nuclear densimeter inspection and in-door and out-door chemical analysis, show that 75% of the blocks are of the rebound number of 21 - 23. and the saturated limit compressive strength and dry limit compressive strength of 10MPa; the carbonized depth of concrete is 1 - 2 mm. Compared with the state of the jetty in 1968, already used for 60 years then, the jetty is expected to serve another 40 years or more after being repaired.

关键词： jetty concrete block damage inspection durability

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大学英语教学改革浅谈

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江苏教育学院学报（社会科学版） 2005年第3期21卷 96-96,106页

作者：张莉江苏教育学院外语系江苏南京210013

大学英语教学应做到5个并重,遵循7个原则,从而使大学英语走出应试教育的困境。

关键词：素质教育大学英语教学原则

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Fabrication of atomically smooth SrRuO_3.thin films by laser molecular beam epitaxy

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Science china(Physics,Mechanics & Astronomy) 2008年第7期51卷 745-749页

作者： LIU GuoZhen1, HE Meng1, JIN KuiJuan1, YANG GuoZhen1, Lü HuiBin1, ZHAO Kun2, ZHENG ShiJian3.& MA XiuLiang3.1 Beijing National Laboratory for Condensed Matter Physics, institute of Physics, Chinese Academy of Sciences, Beijing 100080, china 2 Department of Mathematics and Physics, china University of Petroleum, Beijing 102249, china 3.Shenyang National Laboratory for Materials Science, institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, china 1. Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100080 China 2. Department of Mathematics and Physics China University of Petroleum Beijing 102249 China 3. Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

High-quality SrRuO3.(SRO) thin films and SrTiO3.SRO bilayer were grown epitaxially on SrTiO3.(STO)(001) substrates by laser molecular beam epitaxy. The results of in situ observation of reflection high-energy electron diffraction and ex situ X-ray diffraction θ -2θ scan indicate that the SRO thin films have good crystallinity. The measurements of atomic force microscopy and scan tunneling microscopy reveal that the surface of the SRO thin film is atomically smooth. The resistivity of the SRO thin film is 3.0 μΩ·cm at room temperature. Furthermore, the transmission electron microscopy study shows that the interfaces of STO/SRO and SRO/STO are very clear and no interfacial reaction layer was observed. The experimental results show that the SRO thin film is an excellent electrode material for devices based on perovskite oxide materials.

关键词： SrRuO3 thin film laser molecular beam epitaxy surface morphology

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