江苏：志高南京渠道经销商会召开

在春暖花开的3月,在空调旺季来临之即,志高南京产品管理中心渠道分销商会议在所辖的各区域召开了。3月7日在丹阳、3月8日在镇江、3月9日在南京、3月10日在句容、3月12日在扬州高邮、3月13日在泰州靖江、3月14日在姜堰、3月22日在扬州宝应,在渠道掀起了一股政策跟进、打款提货的热潮。     

主动思变 致胜有道——《创新·转型·绩效:企业蜕变的新思维》

政治经济形势在变化、企业界限在变化、市场在变化、客户在变化、行业在变化、区域发展在变化……作为现代经济基本单位和市场主体的企业,所处的经营环境正变得日益复杂。     

"以人为本"是煤矿企业文化建设的精髓

在企业文化的理念基础上,阐述了煤矿企业文化建设中的五个途径:在坚持以人为本上、在员工整体素质上、在员工的培训力度上、在员工的新老变替上、在干部的选拔任用上都要有新的突破.     

近年梅县地面最低温度偏高出霜情况分析

在我市多年的地面观测中,发现地面温度在0℃以上时,仍有霜出现.而近年随着自动气象站资料在我省的业务运用,在梅县发现地面最低温度在3℃左右甚至5℃时也有霜的记录.本文分析自动站地面最低温度比人工站高的原因、探讨下垫面状况、地面辐射等因素对霜形成的作用,结果表明:在气温较低,地面最低温度在3℃或者以上时,水汽也能在草面上凝结成霜.     

3YYJ飞旋荡椅的研究与设计

3YYJ飞旋荡椅是国内首创的新型大型游乐设备,其特征是:公转梁后端部安装在空心轴上,可在水平方向上自由旋转,自转回转盘安装在公转梁的前端部,亦可在水平方向上自由旋转,吊杆在转盘的圆周上吊住椅子,可在直径方向上自由摆动     

普发真空完成投资项目

2009年10月15日,博世在北京举行了其在中国百年华诞的新闻发布会。站在新的起点上,博世集团董事长弗朗茨·菲润巴赫先生表示：＂在过去的100年中,博世在中国的业务一直持续稳步发展,尤其是在过去的20年,中国成为博世在亚太地区业务增长的基石。     

5种坏习惯使农机“减寿”

在农村,常有一些机手在使用农机时,由于不懂得保养技术或平时养成的一些不良习惯操作,导致农机在使用中受损,从而减少农机的使用寿命,主要表现在以下几个方面。     

企业

庆祝SKF在华经营100周年斯凯孚(SKF)自1912年起在中国开始做销售活动。如今,斯凯孚在中国设有18家工厂,拥有7000多名员工。在其庆祝在华经营100周年之际,斯凯孚也宣布将在中国这个重要的市场开展进一步投资,比如在上海嘉定成立新的斯凯孚园区,以支持其在中国和亚洲的成长。该项投资包括建立一家生产乘用车轮毂轴承的新汽车工厂,将全球技术中心中国(GTCC)、斯凯孚解决方案工厂以及斯凯孚学院搬迁和扩展到新的园区内。     

空套齿轮磨损分析与解决

在我公司所生产的变速箱中,有一种是高低速多挡位的变速箱,在变速箱所用齿轮中有一个高速齿轮空套在输入轴上的,如图1所示,该齿轮在高速挡位时参与啮合,在低速挡位时不参与啮合。     

庆祝SKF在华经营100周年

斯凯孚（SKF）自1912年起在中国开始做销售活动。如今,斯凯孚在中国设有18家工厂,拥有7000多名员工。在其庆祝在华经营100N年之际,斯凯孚也宣布将在中国这个重要的市场开展进一步投资,比如在上海嘉定成立新的斯凯孚园区,以支持其在中国和亚洲的成长。该项投资包括建立一家生产乘用车轮毂轴承的新汽车工厂,将全球技术中心中国（GTCC）、斯凯孚解决方案工厂以及斯凯孚学院搬迁和扩展到新的园区内。     

Minimal Realization of Linear Graph Models for Multi-physics Systems

An engineering system may consist of several different types of components,belonging to such physical"domains"as mechanical,electrical,fluid,and thermal.It is t...     

Quantum Cooperative Robotics and Autonomy

The intersection of Quantum Technologies and Robotics Autonomy is explored in the present paper.The two areas are brought together in establishing an interdisci...     

考虑进油孔有限长滑动轴承油膜力的近似解析解

针对具有进油孔的有限长滑动轴承油膜力求解问题,采用变分原理和分离变量法,求得了有限长滑动轴承油膜压力分布的近似解析表达式。将油膜压力分布的近似解析表达式在油膜存在区域上进行积分,即得到了油膜力。将提出的计算有限长滑动轴承油膜力方法与无限长轴承模型、有限元方法的计算结果进行了比较,发现了提出的方法与有限元方法的计算结果很接近。最后,研究了进油孔位置和进油压力对油膜存在区域、油膜力等的影响,研究结果表明进油孔位置和进油压力对油膜存在区域和油膜力有较大的影响。     

三绕组变压器的双绕组等效建模及在Matpower中的应用

针对实际电网存在着大量的三绕组变压器,但国际上一些著名商业软件,如BPA仿真软件、Matpower这一权威潮流计算开源软件,均只提供双绕组变压器模型,限制了其在具有三绕组变压器的电力系统中的应用的问题,潮流计算是自主开发的电力系统各种应用软件的核心模块,因此依托国际权威开源程序进行二次开发,是一种较好的选择。对Matpower要求的数据格式进行了归纳,对变压器的一般的等值电路及带理想变压器的等值电路和带标幺值的等值电路进行了分析研究,提出了三绕组变压器转换为双绕组等效模型的建模方法,使得原先只适应双绕组变压器的潮流计算软件可以适用于三绕组变压器电网的潮流计算;最后以Matpower软件为例进行了案例计算,并用PSASP仿真软件进行对比验证。研究结果证明,所提出的建模方法是有效的。     

On the Relation of Load to Average Gap in the Contact Between Surfaces with Longitudinal Roughness

A computer simulation model for the contact between longitudinally-oriented rough surfaces has been formulated. This model closely duplicates the actual surf ace contact deformation behavior by taking into account the elastic interactions between the asperities. There were no assumptions made about the shapes, or any deformation behavior of the asperities, except for their obeying the laws of elasticity. The plastic deformations on the high asperity peaks were taken into account by setting a ceiling on their contact pressures at the material hardness value. The simulations used real surface profiles which were digitized from unworn circumferentially ground steel surfaces. Each pair of these profiles was mathematically combined to form an equivalent rough profile pressing against an infinitely rigid flat and having the appropriately adjusted elastic modulus. A total of 28 different pairs of profiles were used in the simulations. Each contacting pair was subjected to 30 different load levels and the local contact pressures and deformations were calculated. The contact simulations yielded some important mathematical relationships between parameters, such as the real area of contact, average gap, and average asperity load through statistical curve fitting. Two analytical functions were generated to relate the average load to average gap and the real area of contact to load.     

INTEGRAL EQUATION METHOD＇S APPLICATION IN HOLE-EDGE STRESS OF COMPOSITE MATERIAL PLATE WITH DIFFERENT SHAPED HOLES

The strength of composite plate with different hole-shapes is always one of the most important but complicated issues in the application of the composite material. The holes will lead to mutations and discontinuity to the structure. So the hole-edge stress concentration is always a serious phenomenon. And the phenomenon makes the structure strength decrease very quickly to form dangerous weak points. Most partial damage begins from these weak points. According to the complex variable functions theory, the accurate boundary condition of composite plate with different hole-shapes is founded by conformal mapping method to settle the boundary condition problem of complex hole-shapes. Composite plate with commonly hole-shapes in engineering is studied by several complex variable stress fimction. The boundary integral equations are founded based on exact boundary conditions. Then the exact hole-edge stress analytic solution of composite plate with rectangle holes and wing manholes is resolved. Both of offset axis loadings and its influences on the stress concentration coefficient of the hole-edge are discussed. And comparisons of different loads along various offset axis on the hole-edge stress distribution of orthotropic plate with rectangle hole or wing manhole are made. It can be concluded that hole-edge with continuous variable curvatures might help to decrease the stress concentration coefficient; and smaller angle of outer load and fiber can decrease the stress peak value.     

Non-monotonic material contrast in scanning ion and scanning electron images

30 keV Ga⁺ focused ion beam induced secondary electron (iSE) imaging was used to determine the relative contrast between several materials. The iSE signal compared from C, Si, Al, Ti, Cr, Ni, Cu, Mo, Ag, and W metal layers does not decrease with an increase in target atomic number Z₂, and shows a non-monotonic relationship between contrast and Z₂. The non-monotonic relationship is attributed to periodic fluctuations of the stopping power and sputter yield inherent to the ion–solid interactions. In addition, material contrast from electron-induced secondary electron (eSE) and backscattered electron (BSE) images using scanning electron microscopy (SEM) also shows non-monotonic contrast as a function of Z₂, following the periodic behavior of the stopping power for electron–solid interactions. A comparison of the iSE and eSE results shows similar relative contrast between the metal layers, and not complementary contrast as conventionally understood. These similarities in the contrast behavior can be attributed to similarities in the periodic and non-monotonic function defined by incident particle–solid interaction theory.     

电站锅炉模糊风险评价方法研究与应用

针对电站锅炉风险等级评价问题,将模糊综合评价技术应用到电站锅炉风险等级评价中。开展了电站锅炉失效影响因素及模糊评价因素的重要程度分析,建立了一套科学合理适于在线评价的电站锅炉风险评价体系,提出了模糊综合评价技术与改进的模糊层次分析法相结合的模糊风险评价方法,利用改进的模糊层次分析法计算了指标体系中各层指标权重。对某一台电站锅炉的实际运行工况影响子因素进行了模糊风险评价,采用模糊合成算子进行模糊综合运算得到电了站锅炉运行工况影响子因素的评价向量。研究结果表明:电站锅炉的运行工况影响子因素的风险评价等级为第6级,失效可能性等级为小,该电站锅炉运行工况良好。     

Short-Term Relay Quality Prediction Algorithm Based on Long and Short-Term Memory

The fraction defective of semi-finished products is predicted to optimize the process of relay production lines, by which production quality and productivity ar...     

End-to-End Multiview Gesture Recognition for Autonomous Car Parking System

The use of hand gestures can be the most intuitive human-machine interaction medium.The early approaches for hand gesture recognition used device-based methods....