| 1. | A mst based clustering method with controlling vertexes
一种带控制节点的最小生成树聚类方法 |
| 2. | The following flags control vertex processing behavior for the hardware abstraction layer ( hal ) and reference devices
下面的标识为硬件抽象层和引用设备控制顶点处理的行为。 |
| 3. | The first algorithm gives unique result unaffected by the handling order of points concerned , and it calculates the control vertexes at once without estimation and correction
第一种算法的特点是重建结果不依赖于顶点的处理顺序，不需要进行控制顶点的初估及修正，可使各控制顶点的计算一次完成。 |
| 4. | Two methods are given to get the control vertexes , by making the two approximated helix segments gc2 continuous at their connecting point and leting the theoretical helix and the approximated one coincident at five points respectively
对于其控制顶点的确定给出了两种方法。方法一，使逼近螺线在连接点处gc ~ 2连续，得到的逼近螺线与理论螺线在两端点及中心理误差为零。 |
| 5. | A fairing method based on energy me thod for cubic b - spline curves is presented . since only local control vertices ar e modified , this method , compared with energy method , not only makes the c omputation faster , but also makes the changes in shape of curve less
4 )研究了b样条曲线光顺的问题，在传统能量法的基础上提出了b样条曲线的一种光顺方法。该方法通过对局部控制顶点的修改来进行曲线光顺。 |
| 6. | The general idea behind the second one is approximation . the control mesh is subdivided until the error between the control vertices and corresponding subdivision surface is less than a given threshold . then the vertices substitute those points on the surface approximately . the last step is to calculate offset point for every vertex and connect them to form an offset surface
第二种算法采用逼近思想，首先通过对控制网格进行细分，当控制顶点和细分曲面的距离满足一定误差要求时，近似用控制顶点代替细分曲面上的点，然后对各个顶点分别求等距点。 |
| 7. | It offers the idea according to problem faced , considering the good character of the ends , the ajusted cubic b - spline curve is used to fit ship lines . it finds out the control vertexs according to a sequence of given points , and then , through particular formula , each point in the curve could be worked out . it smoothes lines with the method based on small - paramter
针对面临的问题，提出了自己的思路，在数学计算方法上，由于三次准均匀b样条曲线良好的端部性质，这里用它来拟合船舶型线，首先根据所给的初步型值求出其控制顶点，然后根据相关公式进行插值便能得到曲线上的所有插值点。 |
| 8. | During the past decades , some researchers , such as : bezier , kj . versprile , deboor and cox , etc . had made great progress in the filed of constrained b - spline curve and surface fitting . in this article the method of constrained b - spline curve was introduced , which is used to figure out the control vertexes . using this interpolation method we can calculate every points of a uniform b - spline
并且分析了在各种端点情况下，在重节点的情况下，如何反算控制多边形的顶点；如何在求出控制多边形顶点之后，插值计算b样条拟合曲线上的每一点；并通过结合双尾船的型线，采用visualc + +和autocad2002为平台，分别编制了相应的软件，对提供的型值做出绘图处理，取得了良好的效果。 |
