介绍了利用89c52作为控制核心的混凝土砌块配料自动控制系统方案，并对其测量电路进行了分析，给出了较详细的程序流程。
This paper introduces the project of concrete burdening automation control systems base on 89c52, and analyzes the signal measuring circuit, also provides software program scheme.
介绍基于PSPICE电路分析程序的自动优化设计系统及其在对数视频放大器设计中的应用和实验结果。
The automatic optimal design system is based on the circuit analysis software-PSPICE. In application, a video log amplifier is designed and the results are presented.
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