The thin film TE material resistivity measurement system which is designed in the thesis bases on the principle of four-probe method and double pulse technology.

本论文依据四探针法的基本原理并结合双脉冲技术，设计并制造适用于薄膜温差电材料的电阻率测试系统。

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By using one-dimension FDTD method we simulates the decay of double exponential pulse through the soil media, and its refractive time-domain wave shape is discussed in detail.

用一维FDTD方法模拟了双指数脉冲在单层岩土介质中的衰减，并对电磁波在岩土层中的穿透进行了详细的讨论。

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The paper introduces the principle of frequency measure based on double-counter and multi-periods pulse synchronization method, and the designing with microprocessor is offered.

介绍了双计数器多周期同步法频率测量原理，给出了用单片机实现的具体实现方案。

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