A right - angled triangle that is similar to the calibration deice is built in 3 light lines that are imaging lines of 3 point of the calibration device . the relation can solve the external parameters of the digital camera 在标定装置三点成像的光线上建立一个直角三角形，使这个直角三角形与标定装置的三角形相似，由此来确定相机的所有外部参数。
The following is some main content of this thesis : structure respect : a structure of parallel driven simulating table with three apex of right triangle supporting was proposed on the basis of use for reference many structures of simulating table . its movement postures of space and surtax movements are computered and analysed , and adopted matlab software perform dynamic simulation to it . the respect in machinery design : the structure of upper and subjacent platforms for simulating table were designed 本论文从仿真转台的整体来考虑，对仿真转台的各个部分进行了研究和探讨，下面是本论文的一些主要内容：结构方面：在介绍了多种转台结构的基础上提出了采用直角三角形三点支撑的并联驱动仿真转台，对其空间运动姿态及附加运动进行了解算和分析，并采用matlab软件对其进行了动态仿真。
Janos pach and rom pinchasi ( see [ 61 ] ) proved that any set of n points in strictly convex position in the plane has at most [ 2 ( n - 1 ) / 3j triples that induce unit triangles ( equilateral triangles of side length one ) , and any set of n points in convex position in the plane has at most n - 2 triples that induce unit triangles 平面中任一处于凸位abstract置的二一点集至多有2 。一4个三元组满足:每一三元组均导出一个与t0全等的三角形.定理2 . 2 .给定一等腰直角三角形t0 ，平面中任一处于强凸位置的n一点集至多有二个三元组满足:每一三元组均导出一个与几全等的三煮形
At sea , septentrional , by night the polestar , located at the point of intersection of the right line from beta to alpha in ursa major produced and divided externally at omega and the hypotenuse of the rightangled triangle formed by the line alpha omega so produced and the line alpha delta of ursa major 将大熊星座的“贝塔阿尔法”这一直线延长至星座外的“奥墨伽” ，北极星便位于“阿尔法奥墨伽”这道外部区分线与大熊星座内的“阿尔法德尔塔”这一直线所形成的直角三角形斜边的交点上340 。
In order to solve this problem , the distribution of the force was studied . with analyzing the data of ship launching , the paper educes seven typical distribution forms , include uniform distribution , sine distribution ( 1 / 2 amplitude ) , trapezoid distribution , right triangle distribution , sine distribution ( 1 / 4 amplitude ) , parabola distribution , isosceles triangle distribution 主要有七种分布形式，包括分布趋势较平缓的均匀分布形式、正弦( 1 2波形)分布形式、梯形分布形式；峰值出现在滑道最前端的直角三角形分布、正弦( 1 4波形)分布、抛物线形分布；还有峰值出现在分布区域中间的等腰三角形分布。
