基于WEB的钢板弹簧设计系统开发

本文运用php网络编程语言开发了基于WEB平台上的钢板弹簧设计系统。该系统具有对前簧、后簧（含复合弹簧）的设计功能，可应用于Internet的网上设计。     

Java 3D在虚拟现实中的应用

Java 3D是基于Java平台面向对象的三维图形应用程序接口,便于在网上实现三维图形的显示、浏览.Java语言具有结构中立性、网络分布性等优点,它的3D图形API在开发Internet及WWW上的图形网络应用程序时有极大优势,因而得到了迅速地推广和应用.介绍了Java 3D的功能、数据结构并组建了一个虚拟三维场景的网上发布系统的基本体系结构.     

基于虚拟仪器的砂带磨削参数远程网络化测控系统

将虚拟仪器的网络化测控系统用于砂带磨削参数测量和控制,它将实时采集的磨削参数,经PXI系统控制器显示、分析、处理.在LabVIEW系统平台的Web服务器和DataSocket服务器支持下,将数据发布到以太网或Internet网上,并能实现远程控制功能.     

汽车货运煤炭交易市场电子商务平台的构建

在煤炭的交易过程中实施和应用电子商务,可以使企业整体物流系统具有更快的反应速度,信息处理效率更高,同时物流网络建设更趋合理,更加接近用户.汽车货运煤炭交易市场电子商务平台正是为了满足煤炭企业在网上进行商贸活动而提出的.它以Web技术为基础,通过ASP.NET平台,使用VB.NET语言开发出的具有较强交互功能的电子商务网站.     

《金属工艺学》课程线上教学资源建设与实践

本文针对《金属工艺学》课程特点,结合线上教学平台功能,对课程内容、教学方案及教学形式进行了优化。通过合理安排教学内容、精心设计教学方案,细致遴选网上优质课程资源以及精心自建课程视频资源推进课程饱和度、深度建设。在实施教学过程中,利用多平台混合模式线上教学和测试手段,提升学生学业紧张度和学习主动性。     

企业网上招投标系统的实施应用

随着计算机网络的快速发展,招标投标也由原来的手工操作方式逐步转变到在Intemet网上进行的方式.网上招标投标是指通过专用招标投标电子商务平台,供应商、招标方通过网上传递授标数据,开标、评标均采用电子手段,通过网络发布中标结果的一种招投标方式.凭借互联网的运行成本低、覆盖面广的优势,结合企业实际,介绍了企业网上招投标系统的实现.     

虚拟楼盘展示在SketchUp上的设计与实现

使用沙盘、平面图和样板房等传统的方式进行小区楼盘展示,成本高、不够直观并且缺乏灵活性。为了解决这些问题,使用SketchUp完成网上虚拟楼盘的初步制作,根据楼房结构从整体到细节进行纹理合成创建模型,再通过有效的优化算法减少模型的复杂度,利用Google SketchUp和Google Earth良好的兼容性实现模型的网上发布和楼盘的在线浏览。研究结果表明,该虚拟楼盘展示平台的成本低廉,楼盘模型的修改和维护便捷,是一个拥有良好立体视觉效果的网上楼盘展示平台。     

超市网上购物系统的设计与实现

着重论述了超市网上购物系统功能与实现、数据流程及存储等。运用HTML语言、PHP与后台数据库MYSOL链接等关键技术建设网上购物系统。     

基于WEB技术的双语教学系统的开发

以Dreamweaver MX为网站开发工具,综合运用HTML语言、JavaScript语言、PHP等多种编程语言,并结合后台数据库等关键技术建立了网上教学系统。该系统虚拟了一个网络教学社区,集网上教学、双语教学、在线答疑、学习辅导、交流论坛等功能于一体,实现了学生的课下自学、自测、师生在线互动等重要环节,并突出了C语言教学的双语功能。     

网格简化算法在产品展销中的应用

虚拟现实技术的发展为产品的网上展销提出了新思路,客户可以全方位、互动式地在网上浏览三维产品,为了保证浏览的实时性而不用增加硬件成本,提出采用网格简化技术对产品模型进行处理.介绍了Garland的二次误差测度简化算法以及笔者提出的加权算法的原理、数据结构和接口及实现技术.最后,给出了用VC 和OpenGL开发的这个简化平台在三维产品网上展销中的应用实例.     

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...     

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.     

Application of Feature Extraction through Convolution Neural Networks and SVM Classifier for Robust Grading of Apples

This paper proposes a novel grading method of apples,in an automated grading device that uses convolutional neural networks to extract the size,color,texture,an...     

分布动态载荷识别的抗噪处理

针对正交多项式频域法在用多种响应对矩形薄板进行载荷识别中抗噪性较差的问题,综合运用平均法、矩阵预处理和奇异值截断法等方法对之进行改善,并引入空间映射的思想,将该方法的应用范围拓展为复杂的模型.利用仿真算例,证实了该方法具有较好的抗噪性.     

基于MELTAC-N平台的核电厂安全级DCS环网研究与测试

针对工程实践中环网通讯相关问题的处理缺乏理论基础及国产化安全级DCS平台的开发缺乏成熟经验借鉴问题,对基于MELTAC-N平台核电厂安全级DCS环网的软硬件实现进行了研究。提出了安全级DCS环网双环网冗余设计、光切换开关设计等硬件设计方法,以及以RPR协议为基础,采用全数据收发策略的软件设计方法。在CPR1000安全级DCS平台上对安全级DCS环网的可靠性及实时性进行了评价,并进行了容错能力、响应时间及响应时间稳定性测试验证实验。结果表明,基于MELTAC-N平台安全级DCS环网软硬件设计具有较好的容错能力及响应时间稳定性。     

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....     

The laboratory simulation of abrasive wear

Abrasive wear has long been recognised as one of the most potentially serious tribological problems facing the operators of many types of plant and machinery; several industrial surveys have indicated that wear by abrasion can be responsible for more than 50% of unscheduled machine and plant stoppages. Locating the operating point of a tribological contact in an appropriate operational ‚map’︁ can provide a useful guide to the likely nature and origins of the surface degradation experienced in use, though care must be exercised in choosing the most suitable parameters for the axes of the plot. Laboratory testing of materials and simulations of machine contacts are carried out for a number of purposes; at one level for the very practical aims of ranking candidate materials or surface hardening treatments in order of their wear resistance, or in an attempt to predict wear lives under field conditions. More fundamentally, tests may be aimed at elucidating the essential physical mechanisms of surface damage and loss, with the longer term aim of building an analytical and predictive model of the wear process itself. In many cases, component surface damage is brought about by the ingress of hard, particulate matter into machine bearing or sealing clearances. These may be running dry although, more usually, a lubricant or service fluid is present at the interface. A number of standardised wear test geometries and procedures have been established for both two- and three-body wear situations, and these are briefly described. Although abrasive wear is often modelled as following an ‚Archard’︁ equation (i.e. a linear increase in material loss with both load and time, and an inverse dependence on specimen hardness) both industrial experience and laboratory tests of particularly lubricated contacts show that this is not always the case: increasing the hardness differential in an abrasively contaminated lubricated pair may not always reduce the rate of damage to the harder surface.     

ANGULAR DISTORTION ALLOWABLE VALUE AND ASSESS METHOD OF WELD ON COKE TOWER

A graph as the new engineering method for estimate the safety of bulging deformation of coke tower is proposed. Through stresses analysis of circumferential weld of coke tower and comparing the stresses produced by pressure with heat stress of steady state, residual stress, bending stress produced by both itself weight and wind loads, it showed that the stresses produced by pressure on the angle distortion are the main factor of equivalent stress of the combined stress. After comparing four kinds of stress controlling conditions, the relation to stress with depth of angular distortion, grade of curvature of angular distortion and half of region of angular distortion has been inferred. Graph of deformation allowable value of coke tower for different condition by angular distortion and half of region of angular distortion has been plotted. The five steps for its engineering use have been explained. The lighter the grade of curvature is, the larger of bulge allowance, may be, and the bigger of depth of angular distortion may pose too. For the coke tower with a popular structure of Dg 5 400 mm×28 mm, the result by graph is nearly more than the result of two formulas formed by other research, the error is less than 7.0%. But, the graph can be easily applied to different size of angular distortion.