The existed material fatigue performance test curves are dealt with and analyzed , and the non - dimensional stress - strain curve , tangent modulus factor curve and fatigue life curve are drawn based on the experiment data , and these three non - dimensional parameter curves are used to find the inherent rules that the test curves can be replaced each other to some extent . it can be concluded that if the common character and system error of these materials are found , the test curve of a certain material can be used for reference by another material . this is a simple approach about fatigue life estimate and is engineering practical 对已有的材料力学疲劳性能试验曲线进行分析整理,利用试验数据绘制了相对应力应变曲线、切线模量因子曲线和疲劳寿命曲线,利用这三种无量纲参数曲线发现了其中存在的规律性,即在某种程度上实验曲线可以互相取代,并用试验数据对此进行了讨论,并由此推断,如果找出材料彼此的共性或彼此之间的系统误差就可以将一种材料的试验曲线供其它材料参考使用,这是一种估算材料的疲劳寿命的简便方法,对工程而言具有实用性。
We put more attention on the study of 3d graphic rendering technology , such as shading model and ray tracing . shading model is compared of simple shading model and whole shading model . studied the radiosity and texture mapping , mainly about the parameter curve surface texture mapping , two steps texture mapping , environment texture mapping and mip - map mapping 研究了光照模型及光线跟踪技术,包括简单光照明模型、整体光照明模型;分析了辐射度方法及纹理映射技术,研究了纹理映射中参数曲面的纹理映射技术、两步法纹理映射、环境映射、 mip - map映射等映射技术。
This paper summaries the researches on the new schemes of parameter curves and surfaces modeling - curves and surfaces modeling of trigonometric polynomial , which includes curves and surfaces of t - bezier , t - b - spline , tc - bezier and tc - b - spline . hc - b zier curves and surfaces are also discussed in the space of hyperbolic functions in the end 本文主要对参数曲线曲面造型的一种新方法? ?三角多项式曲线曲面进行了深入研究,其内容主要包括t - b zier曲线曲面、 t - b样条曲线曲面、 tc - b zier曲线曲面和tc - b样条曲线曲面。