用BCB绘制椭圆图形的范例文件，拷贝到按钮点击事件里即可运行-with BCB elliptical graphics rendering paradigm paper copy of the button click event can be run Lane

绘制分形图: 摇摆分形树，3. 在摇摆分形树的基础上加上对鼠标事件的处理, 用户按下左键, 动画开始, 再次按下左键, 动画暂停 -Draw fractal images: swing fractal tree, plus handling mouse events. Swing fractal tree based on the user presses the left button, the animation starts, press the left button again

求故障树的 1）对偶树； 2）最小割级和最小路集； 3）假定底事件的故障概率已知，求顶事件发生的概率； 4）求底事件的结构重要度、概率重要度和关键重要度。-Seeking Fault Tree 1) dual tree 2) minimum cut level and minimal path sets 3) It is assumed that the end of the event of the failure probability known, find the p