极坐标法与弦线支距法在施工放线中的应用

针对现有的建筑物平面布置越来越复杂、施工放线过程比较困难的现状，根据极坐标和弦线支距法的基本原理，结合两个工程实例，详细介绍了极坐标法和弦线支距法在具体放测圆弧轴线中的应用，为施工技术人员在施工过程中提供有益的参考借鉴。最后，对极坐标法和弦线支距法的应用提出几点体会，供大家讨论。     

提高液体静动压主轴系统刚度的一种有效措施

在对液体静动压主轴系统刚度进行综合分析的基础上，提出以加大主轴两轴承之间部分直径来提高主轴系统的刚度的新措施，该措施具体运用在液体静动压主轴系统设计中，突破了原来静动压主轴系统设计时因为考虑主轴热胀因素而将主轴止推轴承放在一端的局限，该措施通过在实际胀长变动量小于止推间隙公差范围内加大主轴中间直径，将主轴止推轴承置于主轴两端，从而达到主轴系统刚度显著提高的目的。     

野外常用地质计算公式及求构造主应力轴——通用地质坐标系应用实例之二

十多个常用的通用地质坐标系公式附在野外记录簿后面,给野外地质工作者带来了很大方便。用电子计算器可在野外根据现场实测的小构造数据随时计算出主应力轴方位,编制的程序可在PC—1500袖珍计算机上进行计算并作图。     

铂重整16P8热载体泵轴失效原因的分析

对失效的16P8热载体泵轴进行全面的检验及分析，认为泵轴断裂发生在轴阶梯部位圆角过渡表面处，是由于该处圆角半径过小，并有蚀坑存在，在交变旋转弯曲载荷的作用下，产生了严重的缺口效应，形成了很高的局部应力集中，从而使泵轴在该处产生了疲劳断裂。     

荆峪沟风景旅游区总体规划设计

荆峪沟是一个以狭长沟体为主要形体特征的风景旅游区，在总体规划中，对如何建立空间结构、组织景观、划分景区等问题进行了初步探讨。     

三曲柄式等角速传动万向联轴器运动特性及曲柄杆交点的运动轨迹

通过对三曲柄式万向联轴器建立数学模型的方法验证了三曲柄式万向联轴器的等角速传动特性,分析了三曲柄式万向联轴器三曲柄杆交点的轨迹,三曲柄交点在与输入轴垂直的平面内运动轨迹以及输出轴的运动规律,对解决三曲柄式万向联轴器的振动问题,提高三曲柄式万向联轴器的传输能力提供了理论基础。     

大型立式泵机组轴线摆度的分析处理

本文推导了机组轴线净摆度的变化规律，对不规则摆度产生的可能原因进行了分析，给出了规则摆度的计算处理方法。     

Determination of the direction of the crystal optical axis of ground uniaxial precious stones by means of polarized-light microscope photometry

The direction of the crystal optical axis of a uniaxial microscopic object is determined on the basis of the known correlation between this direction, the displacement of isogyres of the conoscopic figure, and the rotation of the microscope stage. It is shown that the use of photoelectric equipment for indicating the displacement, a stepping motor controlled by a microprocessor for rotating the stage, and a desk calculator for processing the photometric data provides a more convenient and accurate determination than classicial procedures, involving visual inspection and manual operation. The method is particularly suitable for uniaxial crystals of the size and shape of precious stones.     

Flexible bones for the haptic prototyping of deformable objects

Accurate modelling of the compliance characteristics of solid models is an important rendering task for increasing the realism of virtual environments. The ability to feel the force and moment stress resultants that cause the bending, twisting, shearing and/or fracture of physically-based models is useful for a large number of application areas including medical training, CAD environments, computer animation and games. An important element of compliance rendering is the mechanics engine that solves the equations governing the deformations and stresses in solid models. The development of such engines has to carefully balance the needs for haptic (not just graphical) realism with the needs for real time processing at rates in the range of 500-1000 Hz. In this paper we describe methods and techniques we have developed for such an engine, and demonstrate their characteristics in a number of applications including design of compliant mechanisms, animation and solid modelling.