Pro/E课程教学改革的新思路及实践探索

分析了目前Pro/E课程教学中存在的系列问题,提出了Pro/E课程教学改革的基本思路：重视课程导论,激发学生的学习兴趣和学习欲望;案例式教学和启发式教学相结合,引导学生独立思考、自主学习;渗透人文教育。教学实践证明,教学改革对于激发学习兴趣、提高学生独立思考和解决问题的能力、培养学生的创新能力等具有积极的作用,是新形势下教学改革的有益尝试。     

Pro/E三维造型设计案例教学法

根据课程教学目标,提出了Pro/E三维造型设计案例教学法,分析了Pro/E案例教学法具有教学内容与教学目标相一致、强化知识应用能力等优势,研究了该案例教学法的组织与实施,以及运用案例教学应注意的问题。     

基于案例教学和项目驱动的课程教学模式研究与实践——以《焊接工艺与设备》教学为例

为了更好地培养学生工程实践和运用能力,在《焊接工艺与设备》课程教学中,采用案例法和项目法相结合的教学模式进行了探索和实践。在课题教学中通过工程实际案例,以分组形式指导学生自主探究性学习,让学生在融入整个项目开发过程中掌握焊接工艺的设计思路和原则;在课外以小组为团队安排工程项目,驱使学生运用所学知识自主完成项目的总体分析和设计,以培养其分析和解决问题的能力,通过实践取得了良好的教学效果。     

基于翻转课堂的基于翻转课堂的“机械设计”混合教学模式的探索与思考

为弥补传统教学模式的不足,以翻转课堂作为辅助教学手段,实行了混合式教学模式—―通过让学生课前自主学习相关知识点完成知识的传授、课堂上以交流与探讨方式达到知识吸收的目的来开展学习。探索了"机械设计"课程实施混合式教学模式的在线课程建设的内容,并给出了几点教学思考与建议。实践表明:混合式教学模式在一定程度上是以学生为中心来开展学习活动,有利于培养学生的自主学习能力和创新能力。     

绘图软件在《机械制图》教学中的应用

机械制图是机械类专业的一门重要基础课程,学生空间概念和思维能力的建立与培养是该教学的重点和难点。为帮助学生尽快建立空间想象能力,可在机械制图课程教学过程中适当借助AutoCAD、UGNX、Pro/E等绘图软件,这样,既提高了学生学习的兴趣,又能使教学取得良好的效果。     

《机械制图》课程教学方法探索

介绍了应用Pro/E软件进行《机械制图》课程重点、难点内容教学的方法:备课时应用Pro/E软件创建出制图课中需要讲授的典型实例三维实体模型,在讲课中适时打开实例模型,进行动态(旋转、剖切、投影等)演示,配合讲解,可提高学生的形象思维能力和学习兴趣,获得较好的教学效果。     

Pro/E软件在《机械设计基础》课程教学与课程设计中的应用

在《机械设计基础》课程中,引入Pro/ENGINEER三维仿真技术进行辅助教学,可以显著提高教学效果;通过安排课程综合设计项目,引导学生在机械设计课程设计中,利用Pro/E软件进行建模、虚拟装配、干涉检查、工程图制作、运动仿真与动力学分析,提高了机械设计品质和设计效率;利用Pro/E软件激励学生的创造思维,提高学生的创新素质和工程实践能力.     

液压传动直观教学数字模型设计与实现

本文根据液压传动教学特点,提出数字直观教学模式,为学生呈现事物的整体结构,基于任务驱动进入教学过程,实现从"具体"到"抽象"的教学目标.教学中,依靠Pro/E作为后台教学技术支持,开发数字三维模型,学生自主确定组装顺序,并可将组装过程快照为动画文件.应用PPT作为前台教学视窗,提出教学任务信息,展示解决问题事例,为学生提供参考方案.直观教学侧重展示事物的整体,便于学生自主学习,掌握系统分析能力,培养学生创新精神.     

Pro/E在模具专业理论和实践教学中的作用

把Pro/E软件功能应用在模具专业基础课程和专业课程的理论和实践教学上,可以提高学生的空间想象能力和对课程内容的理解和掌握,锻炼学生解决实际问题的能力,也因此能极大地调动了学生学习模具专业知识和技能的积极性和创造性。     

《机械设计》课程资源建设与混合教学模式探索

《机械设计》课程是机械设计制造及其自动化和农业建筑环境与能源工程等各本科专业必修的一门工程专业核心基础课,集中介绍机器运动学和动力学的基础知识,阐述机械传动和轴类零部件,简明扼要的分析通用零件和常用机构的工作原理及校核标准。《机械设计》课程具有非常强的设计理论性、实践性和概念性,能够解决机械工程及相关领域遇到的技术和管理问题,具备分析问题的能力。通过优化课程资源建设,探索出基于案例式分析的线上学习、课堂讨论相结合的混合教学模式,并实现课堂教学的方法学习与实验课程的原理方法验证有机结合。通过混合教学模式的探索,尝试利用先进的信息化技术手段融入到教学中,以生动形象的教学手段,数字教学资源平台激发学生学习兴趣,引导学生自主学习,并通过线上/线下的研讨,加强学生的工程应用分析问题能力训练,提升学生的工程思维能力。     

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.     

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....     

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。     

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.