此程序主要使用matlab模拟了垂直激光器谐振腔的核心部件DBR的工作过程，得到其阈值振荡曲线-This program is mainly use matlab to simulate the working process of the core components of the vertical laser cavity DBR, its threshold oscillation curve

利用存储过程实现：生成一张表格记录每一位录取考生的考生每门课程的考试成绩，其结构类似（考号，学校，考生所在地区，英语，数学，专业课，总分。。。）（使用竖表横打技术）-Using stored procedure: Generate a form to record each candidate' s candidates taking the examination results for each course, its structure is similar to (candidat

用于实现左右纵坐标都有数值，绘制带箭头的图像，在指定点添加文字-For implementing around the vertical axis has value, rendering the image with arrows, add text to a specified point