说明：  此程序用数值分析方法绘制浅结晶体管的稳态热场分布图，一个基区上并连五个发射极条，热流密度近似为发射极条单位面积上的功耗，热沉温度恒定
(Numerical analysis of this program for drawing shallow junction transistor static temperature distribution, on a base region and emitter with five articles, similar to the emitter heat flux per unit area on the power section, a constant heat sink temperature)