由此，我们可以得到一条最优增长路线和对应的价格射线。
From that an optimal growing path and its respondent price ray can be got.
方法根据防护最优化的原则和屏蔽防护的原理，针对X射线机的特点，设计防护装置；
Methods The design of this protective equipment of protection and principle of shield protection, and focused on the characteristics of X-ray machine.
采用射线跟踪法，通过模拟计算得到最优光源的长度和最优长度时，在灯前测试屏上照度分布。
Based on a method of bi-directional light tracking, it works out the best length of lamp-source and the distribution of lamp on the screen with this lamp-source.
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