By splitting a laser beam and aiming each part onto opposite sides of a polished silicon wafer, the group engineered a system of reflection and interference that traps both beams in the silicon.
这组人员设计了一个反射和干涉系统，将激光分成两束，分别对准抛光硅晶片的两面，将两束光限制在硅当中。
Methods The two group patients were tested using BEAM before and after 3 months treatment.
方法磁石枕、氯氮平两组患者在入组前及治疗3个月后的脑电地形图检测对比。
According to these equations, both the most unfavorable loading location and the maximum absolute bending moment of continuous beam loaded under a group of movable loads can be found.
对于在移动集中荷载组作用下的连续梁，应用这些公式，可求得最不利载荷位置和最大绝对弯矩。
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