AutoCAD下幻灯片文件的应用及其批量制作幻灯片文件的方法

AutoCAD环境下的幻灯片文件是一个屏幕显示的快照,目前主要应用在AutoCAD环境下进行二次开发所涉及的用户化界面设计方面.本文尝试了AutoCAD环境下幻灯片文件在零件资料库和用脚本文件播放幻灯片两方面的应用,研究了使用VisualLISP批量制作幻灯片的方法.     

幻灯片文件的建立与演示

AutoCAD 2000的图形设计功能很丰富,可以实现文本、图形的快速输入及建立用户化菜单。下面就把制作过程及原理阐述如下,以飨读者。 1.建立幻灯片文件 我们把具有快速显示功能的图形称作幻灯片,显示幻灯片的文件称为幻灯片文件。幻灯片文件的生成非常简单,只要在打开要建立幻灯片的图形文件     

幻灯片质量检验放映机

最近,北京电影机械研究所研制成功了JH 135型幻灯片质量检验放映机并在机械工业部仪表工业局的主持下通过了技术鉴定。该放映机主要供幻灯片制片厂在生产过程中检验画面质量用,能同时检验幻灯片的彩色还原、机械损伤、清洁度、清晰度、画面尺寸和密度等质量指标。它实现了正反向间歇输片,达到了逐格、跳格等使用要求。它采     

AutoCAD脚本文件及幻灯片文件的定制与使用

介绍在AutoCAD环境下，如何定制包含一系列AutoCAD命令的脚本文件和可以形象展示教学内容及产品信息的幻灯片文件，如何用幻灯片文件循环播放幻灯片，提高绘图效率，实现Auto—CAD的高级应用。     

AutoCAD定制探讨及应用实例

介绍了AutoCAD的定制,探究了AutoCAD程序文件、支持文件和图形文件的组织与结构,在此基础上探索在AutoCAD中创建自定义工具栏、工具选项板,并且制作幻灯片文件和幻灯片库文件的基本方法,并提供了AutoCAD的定制及二次开发的具体实例。     

面向中小企业的零部件资源云端化封装技术研究

针对面向中小企业的零部件资源云制造服务平台中海量、动态、异构零部件资源的云端化实现问题,研究了零部件资源云端化封装的相关技术。以面向中小企业的零部件资源云端化集成与共享为出发点,构建了面向零部件资源全生命周期的零部件资源描述模型,提出了便于零部件资源网络化和结构化组织管理的五层树状结构分类体系以及相应的编码体系,建立了三维零部件资源的参数化建模等操作规范以及零部件资源的云端化封装模型,实现了海量的、动态的、异构的零部件资源的云端化。这对于提高零部件资源的共享与重用,促进中小企业的快速发展有着积极的意义。     

涡旋压缩机压缩机构运动的动态模拟

论述了用AutoLISP编程自动生成不同参数的涡旋型线 ,并用AutoCAD有关绘图命令、操作命令及幻灯片技术模拟涡旋压缩机压缩机构运动过程的方法。     

基于可扩展标记语言的典型零部件设计系统研究

针对网络化协同设计的应用需求,研究了典型零部件设计系统组件体系结构,提出了采用可扩展标记语言表达特征的零部件建模方法。利用可扩展标记语言处理组件及参数化驱动组件,阐述了基于可扩展标记语言的零部件模板生成与参数化重构过程,并结合基于组件的典型零部件设计工具包及专家系统,分析了零部件的设计导航以及零部件之间基于坐标系的自动装配。通过一个在异构计算机辅助设计平台之间进行提升机设计的实例,验证了该系统可实现典型零部件从设计到造型乃至装配过程的一体化、快速化与智能化。     

AutoCAD在字体轨迹自动编程方面的应用

分析了ＡｕｔｏＣＡＤ幻灯片文件的格式，并据此编制了数控加工文件转换程序，给出了程序流程图。可用以对各种字体进行数控编程和铣削、电火花刻字加工     

面向装配制造执行系统的零部件编码技术研究

通过分析制造执行系统对零部件编码的需求和应用现状,在对装配过程中所涉及的零部件进行分类的基础上,提出了面向装配制造执行系统的零部件编码规则.该编码规则结合信息系统使零部件编码有机地集成了零部件技术信息、计划信息、制造信息以及供应商信息等,为实现装配产品的档案管理、信息跟踪提供了基础.最后,通过该编码规则在某企业变速箱装配制造执行系统中的应用,验证了该编码技术的可行性.     

带传动弹性滑动效率分析

通过对带传动弹性滑动的研究,分别对主动轮和从动轮上的弹性滑动与功率损耗进行了分析研究,建立了弹性滑动与传动功率损耗的数学模型,得出了主、从动轮上囚弹性滑动引起的功率损失的大小以及相互关系,进而推导出了其效率计算公式,揭示了弹性滑动与效率之间的内在关系。     

基于PROE曲柄滑块机构的运动仿真及分析

在各类机械传动结构中,曲柄滑块有着广泛的应用,根据曲柄滑块机构设计的原理,提出在Pro/E中实现曲柄滑块设计及实体造型的方法,并利用Pro/E的运动分析模块（Mechanism）对曲柄滑块进行运动分析和仿真,提供对曲柄滑块的优化设计。     

An overview on the tribological behavior of diamond-like carbon in technical and medical applications

Diamond-like carbon (DLC) coatings are a class of materials and, depending on the deposition conditions and the tribological system, different outstanding tribological properties can be obtained. The most important subclasses of DLC are hydrogenated amorphous carbon (a-C:H) and hydrogen free tetrahedral amorphous carbon (ta-C). When DLC slides against a metal, the formation of the so-called transfer layer on the metallic counterpart can protect the metal from further wear. Adhesion and cohesion of this transfer layer is a critical issue and is also influenced by the environmental atmosphere including the relative humidity. When DLC is running against a hard and chemically inert counterface, such as sapphire, the formation of a transfer layer is not observed but low wear is still obtained. This is attributed to the lubricating properties of the graphitic wear residues. Due to its unique combination of properties, DLC is already used in different industrial applications such as magnetic storage media, diesel injection pumps, sliding bearings, car valve rockers, gears, tappets of racing motorcycles, laser barcode scanner windows in supermarkets, VCR head drums, textile industry parts, motor cycle forks, razor blades, etc. In medical applications, i.e. the coating of load bearing joints that slide against ultra high molecular weight polyethylene (UHMWPE), the different in vitro experiments apparently showed contradicting results, mainly due to the different experimental setups and especially the different liquids used as lubricants. However, when DLC slides against DLC in medical applications low wear rates could be demonstrated in different in vitro tests.     

病理切片全景扫描系统在科研中的应用

使用Leica SCN 400病理切片全景扫描系统可实现将载玻片信息自动、快速地转化为高质量数字化切片。这些高质量的数字化切片包含载玻片切片的全部信息,从而促进研究人员的分享、商讨、诠释以及报告和载剪使用。本文还讨论Leica SCN 400系统的优点和不足。     

A new semi-automatic device for autoradiographic coating

A semi-automatic device is described for the coating of slides with nuclear emulsions for autoradiography. The design embodies a metal heatsink for warming the emulsion, and an elevating gantry which withdraws coated slides at a controlled constant speed.     

Light,scanning, and transmission electron microscopy of a single population of detergent-extracted cardiac myocytes in vitro

A technique for performing light, scanning, and transverse transmission electron microscopy on cultured cells grown within a single tissue culture flask is described. Permanent light microscopy slides are obtained by removing selected portions of the plastic tissue culture vessel and mounting them on glass slides with an aqueous mounting solution. The images obtained from these slides are superior to viewing through the bottom of the flask with an inverted stage microscope. For scanning electron microscopy, selected areas are also cut from the remainder of the vessel and prepared for viewing. The final portion of the culture container is transferred and attached to a new tissue culture vessel and prepared for transmission electron microscopy using alcohol instead of acetone and propylene oxide during dehydration, infiltration, and embedding.     

Rapid method for resectioning of light microscopy sections for electron microscopy

A rapid method is described for obtaining ultrathin sections from light microscopy sections. Five-micrometre epoxy sections, heat-flattened to slides, were affixed to the tips of plastic blocks by light-curable dental bond, and cured while still on the microscope stage by illumination with blue light for 2 min. Sections were detached from the slides by rapid cooling and then resectioned for electron microscopy.     

Correlated light optical and scanning electron microscopy of Gram smears of bacteria and paraffin sections of cardiac muscle

Light-microscope slides (3 in. × 1 in.) bearing Gram smears of Erysipelothrix rhusiopathiæ, or Staphylococcus aureus, after preliminary examination under the light-optical microscope (LM), were cut down in size, glued onto specimen stubs, coated with gold and examined in the scanning electron microscope (SEM). These preparations served as a control for investigations into bacteria-cell junctions in tissue. Cover-slips from stained sections of staphylococcal or swine erysipelas endocarditis mounted on 3 in. × 1 in. microscope slides (which had been intensively studied previously with conventional light microscopy) were floated off by immersing the slides in xylol. After dehydration of the tissues on the slides, the preparations were treated similarly to the Gram smears, and were examined with the SEM. Lesions of endocarditis were thus examined, and the information gained from these preliminary examinations shed new light on the pathogenesis of the disease. This information had not previously been available by any other technique. Because of this, and in view of the simplicity of preparing sections for scanning electron microscopy, it is suggested that the SEM might be a useful tool to be applied to routine histological sections.     

A precise stage arrangement for correlative microscopy for specimens mounted on glass slides,stubs or EM grids

The instrumentation necessary for precise and fast correlation of images derived from a light optical microscope (LM) and a scanning electron microscope (SEM) operated in the reflective mode, is described. The specimens can be mounted on standard microscope slides (25 × 75 mm), SEM-stubs (12 mm ø), or on transmission EM grids (3 mm ø). The instrumentation consists of two parts: an attachable precision stage for an LM, and an attachable slide carrier for the stage of an SEM. By taking into account the vernier readings of the stages of both microscopes (LM and SEM), identical particles in a specimen can be found instantaneously under either microscope. Therefore it is concluded that the use of this instrumentation in correlative microscopy (LM → SEM → LM) is time saving, and especially recommended on fragile biological specimens, which may deteriorate rapidly under the electron beam of an SEM.