单圆弧样条保形插值算法

该文以插值具有偶数个点的闭多边形为例提出了一种新的圆弧样条插值算法。这种算法具有以下3个特点：（1）生成的圆弧样条曲线具有保形的特点；（2）圆弧样条中圆弧的段数与型值点个数相同。（3）圆弧段之间的连接点不一定在插值的型值点上，这样就能用更多的自由度来控制拟合曲线的形状。同此文中还提出了一个优化的算法来得到光顺的插值曲线，同时还给出了几个例子加以说明。     

Uniform trigonometric polynomial B-spline curves

This paper presents a new kind of uniform spline curve, named trigonometric polynomial B-splines, over space Ω = span{sini,cost, tk-3,tk-4, …,t, 1} of which k is an arbitrary integer larger than or equal to 3. We show that trigonometric polynomial B-spline curves have many similar properties to traditional B-splines. Based on the explicit representation of the curve we have also presented the subdivision formulae for this new kind of curve. Since the new spline can include both polynomial curves and trigonometric curves as special cases without rational form, it can be used as an efficient new model for geometric design in the fields of CAD/CAM.     

CFG桩复合地基作用特性与设计

介绍了CFG桩复合地基的基本概念及工作机理，并着重阐述褥垫层的作用机理及CFG桩的工程特性及CFG桩复合地基的实用设计方法。     

浅析建筑检测鉴定工作中的问题

既有建筑物的检测、鉴定工作不仅对于评估建筑物的现状有重要意义,而且还直接影响着建筑物改造加固工作。本文重点分析了现阶段检测、鉴定中存在的一些问题,已引起工程人员的重视。