A new device structure of silicon bipolar microwave power transistors with so called tree overlay geometry polysilicon emitter has been designed.
设计了一种称之为多晶硅覆盖树技状结构的双极型微波功率晶体管。
Proposed that a metal cutting database is basically composed of databases of cutting data, tool geometry angles, cutting fluid and unit cutting power.
提出由切削用量库、刀具几何角度库、切削液库和单位切削功率库基本构成金属切削数据库，给出了它们的关系模式。
An intercept method to determine critical hyper-planes of practical dynamic security region (PDSR) of power system is developed by use of knowledge of geometry.
利用几何学知识推导出了确定电力系统实用动态安全域（PDSR）临界超平面的截距法。
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