遥测法获取建筑物立面图

作为建筑物数字化建设的一项重要内容,建筑物立面图可以通过多种测绘方法获得。研究了普通测量设备条件下测绘建筑物立面图的方法,提出了建立控制基线,遥测获取建筑物特征点三维坐标并通过坐标变换,最终获取立面图的手段,结合非量测相机,采用一种近似但较简洁的解析方法对建筑物细部图形要素进行了提取。同时对建筑物特征点采集数据中可能出现的粗差,提出了检查和评判的方法。实践证明本方法具有简洁、实用的特点。     

Temperatureinfluss auf den Adhäsionsverschleiß beim Umformen von Aluminiumblechen

Influence of temperature on adhesive wear at deep drawing of aluminium alloys Deep drawing processes, used to manufacture aluminium components, are often sensitive to adhesive wear. Thus, the process stability as well as the quality of the formed parts may not fulfil the required specifications. Approaches, developed to reduce this wear phenomenon, still neglect the influence of temperature inside the forming area. Hence, this parameter is analysed by numerical and experimental tests. The tests are conducted by using a strip drawing device, enabling the experimenter to accomplish parameter variations. Subsequently analysis with tempered tools were done to show correlation between adhesion and temperature. The temperature supplied to the model tool corresponds to the temperature occurring in real forming process. In contrast to strip drawing test without external heat source, during the experiments with tempered tools adhesive wear could be shown. Thus, approaches to reduce adhesion wear should account for the influence of temperature.     

关于标准生成吉布斯自由能的一种计算方法及绘图实例

根据目前国际上流行的数学和工程计算软件IVIATCAB能很好地帮助工程师和科学家解决实际工程和技术问题的特点，针对热力学标准生成吉布斯自由能对材料合成和加工过程中的物质的反应和相变分析具有密切关系的情况，介绍了一种用MATLB软件计算标准生成吉布斯自由能及绘图的简便方法，并通过实例进行了说明。     

水泥窑煅烧带图像数据库系统的研究

利用图像处理技术，将采集到的水泥窑煅烧带图像进行处理，并根据存储条件把有效图像存人数据库，应用基于内容的图像检索技术对数据库中的图像进行检索和对图像数据库的安全管理。     

72A硬线钢拉拔横向断裂原因分析

用金相显微镜和显微硬度计分别观察和测量了拉拔过程中发生横向断裂的72A硬线钢组织与硬度。在钢丝断口处存在尺寸较大的卷渣缺陷；钢丝表层存在硬度高于正常索氏体组织的非索氏体组织；并在钢丝中观察到沿索氏体分布的魏氏铁素体组织。这些组织和缺陷引起应力集中、并使钢丝表层与心部的拉拔变形严重不一致而导致钢丝发生横向断裂。     

冲压工艺技术在电机端盖制造中的应用

分析了压缩机用电机端盖的结构工艺,介绍了电机端盖冲裁和拉深工艺的具体设计;充分利用拉深、反拉深交替进行的方法,抵消拉深产生的残余应力;提高拉深成形的可靠性,确保产品质量.     

A single solution method for converting 2D assembly drawings to 3D part drawings

Although solid models play a central role in modern CAD systems, 2D CAD systems are still commonly used for designing products without complex curved faces. Therefore, an important task is to convert 2D drawings to solid models, and this is usually carried out manually even in present CAD systems. Many methods have been proposed to automatically convert orthographic part drawings of solid objects to solid models. Unfortunately, products are usually drawn as 2D assembly drawings, and therefore, these methods cannot be applied. A further problem is the difficult and time-consuming task of decomposing 2D assembly drawings into 2D part drawings. In previous work, the authors proposed a method to automatically decompose 2D assembly drawings into 3D part drawings, from which 2D part drawings can be easily generated. However, one problem with the proposed method was that the number of solutions could easily explode if the 2D assembly drawings became complex. Building on this work, here we describe a new method to automatically convert 2D assembly drawings to 3D part drawings, generating a unique solution for designers regardless of the complexity of the original 2D assembly drawings. The only requirement for the approach is that the assembly drawings consist of standard parts such as bars and plates. In 2D assembly drawings, the dimensions, part numbers and parts lists are usually drawn, and the proposed method utilizes these to obtain a unique solution.     

钢筋混凝土简支深梁受剪承载力的极限分析

本文讨论了钢筋混凝土简支深梁的剪切破坏形态和主要影响因素,假定钢筋和混凝土均为刚塑性材料,引用混凝土双向受压的破坏条件,求出了集中和均布荷载作用下钢筋混凝土简支深梁受剪承载力的塑性解。根据试验结果给出了考虑混凝土强度和剪跨比影响的深梁混凝土塑性有效抗压系数,所获得的理论公式与国内外试验结果符合良好。     

地质勘查和深部地质钻探找矿技术的探讨

各种工程项目的数量和规模的不断增加,进一步加大了社会对矿产的需求量。基于此种情况,本文对深部地质勘查和钻探找矿技术进行研究。通过实际的工程案例对该技术进行分析,希望可以对深部找矿工作提供一定的帮助。