基于可视化技术的波音777货机模拟装载系统设计

对波音777货机模拟装载可视化系统进行了研究,利用该系统能够通过人机交互界面操纵虚拟控制面板模拟集装器装载过程,并以可视化的形式直观显示装载进程以及相关装载信息。系统所需模型组件使用CATIA进行绘制,并在3D MAX中进行渲染,最后在Unity 3D平台中借助C#语言进行系统的集成。从可视化系统的仿真对象、系统的总体方案设计、可视化界面设计几个方面进行了研究。验证结果显示货机模拟装载可视化系统有助于操作人员熟悉货舱结构和装载流程,能够为培训货机装载人员提供帮助。     

利用3DSMAX实现拟人机器人动画仿真

效果良好的三维动画仿真可为似人机器人的步态规划、运动学分析以及控制等方面的研究工作提供形象逼真的可视化结果，在目前众多能够实现动画仿真的软件工具中，使用3DS MAX具有模型美观逼真、操作简单、易于改变观察视角等诸多优势，但目前论述该方面内容的文献却并不多见。这里就如何利用3DS MAX实现拟人机器人动画仿真以及该法的优点进行了较为详细的阐述。     

货物在铁路运输中装载加固方案的设计及应用

以起重机小车架铁路运输装载加固方案为例,对货物装载加固方案进行了分析,总结了装载加固方案的特点,以指导实际应用。     

地面雷达铁路运输装载加固方案设计探讨

文中针对地面雷达的结构特性,对地面雷达铁路运输过程中的受力进行了简要的分析。按《铁路货物装载加固规则》要求设计了加固方案,并对易出错参数的选取进行了解释和规范。在风力计算中考虑了货车交会时产生的附加风压。分析比较了因平板车上捆绑点位置不同引起的拉牵绳纵(横)向拉力数值变化对加固强度的影响,提出了计算公式的修正方法,有利于铁路提速后的运输安全,具有一定的参考价值。     

基于3DSMAX制作机械动画原理课件的研究

详细介绍了在3DS MAX软件中制作机械动画运动原理的过程,以四连杆机构的动画制作为例,从三维造型的引入、机构零件的渲染以及动画的制作3个方面进行了阐述,为机构机械动画制作提供了新方法,充分展示了3DS MAX软件动画技术在多媒体课件中的应用优势。     

圆柱形大件货物的装载加固

本文根据圆柱形（含球形）大件货物种类繁多的特点，以某长轴为例对不规则货物的包装进行了装载加固计算。     

蜗轮蜗杆减速箱拆装动画的设计与制作

简要讨论了蜗轮蜗杆减速箱拆装动画的设计与制作，包括AutoCAD建模和3D Studio MAX动画设计与实现。AutoCAD建模分零件建模和减速箱装配两个环节；3D Studio MAX动画制作从三维造型的引入、运动的设计制作与编辑、赋材质和渲染输出四个方面进行了阐述。     

多媒体动画中弹簧的装配定位与运动控制

在六足仿生机械昆虫装配动画制作过程中,通过综合运用AutoCAD软件和3DS MAX软件的相关功能,实现对六足仿生机械昆虫弹簧类零件的精确定位和运动控制,提升了多媒体动画的制作水平,也促进了仿生机械的发展.     

一种OpenGL中3D Studio模型的读取与控制方法

提出了一种在OpenGL中读取和控制3D Studio模型的方法.该方法首先利用3D Studio MAX软件分层建立物体的三维模型;然后采用面向对象技术,通过定义C3DModel类和CAseRead类封装3D模型的信息和读取操作以实现在OpenGL中引入三维模型;最后采用OpenGL中矩阵堆栈的方法实现对模型的控制.该方法已在VC/MFC下得到了实现,并可用于仪器可视化或虚拟仪表系统的开发.     

计算机仿真技术在机械设计中的应用

叙述了3DS MAX在机械设计及动画制作过程中的应用,从而实现三维机械设计及机构运行的动态仿真。     

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.     

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....     

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。     

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.