基于四元数的相机姿态旋转矩阵参数表达方式，用于相机检校或者几何处理
the attitude rotate matrix described by quartion
(2015-06-28, Visual C++, 1381KB, 下载8次)
某校大门外长度为L的马路上有一排树，每两棵相邻的树之间的间隔都是1米。我们可以把马路堪称一个数轴，马路的一端在数轴0的位置，另一端在L的位置；数轴上的每个整数点，即0,1,2,……,L,都种有一棵树。由于马路上的一些区域中的始点和终点的坐标都是整数，区域之间可能有重合部分。现在要把这些区域中的树（包括2端点）移走。计算还剩多少树？
There are several test cases in the input. Each case starts with an integer L (1 <= L < 2000000000) representing the length of the road and M (1 <= M <= 5000) representing the number of sections that are assigned for other use. The following M lines each describes a section. A line is in such format: Start End Here Start and End (0 <= Start <= End <= L) are both non-negative integers representing the start point and the end point of the section. It is confirmed that these sections do not overlap with each other. A case with L = 0 and M = 0 ends the input. (2013-04-29, Visual C++, 1KB, 下载3次)
力矩分配法校中船舶轴系。只是作分配用, 没有计算力矩。有待提高.....
Distribution method in checking ship shafting. Only used for distribution. (2009-03-01, Visual C++, 2KB, 下载4次)