介绍了D JY - 2000b型地震电磁波脉冲观测系统的组成、工作原理、主要功能和技术指标等。

The structure, principle of working, primary functions and technical features of the Observation System of DJY-2000B Seismic Electromagnetic Impulse are introduced.

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先前基于宏观电磁波(包含大量光子)的实验已经证明，光前驱是光脉冲在传播过程中最快的部分。

Previous experiments based on macroscopic electromagnetic wave propagation (involving lots of photons) have shown that the optical precursor is the fastest part in the propagation of an optical pulse.

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本课题详细分析了船舶导航雷达的工作原理，包括电磁波工作特性、脉冲雷达基本原理以及雷达定位的工作原理。

The operation principle of marine navigation radar is deeply analyzed in this project, including the basic principle of radio, impulse radar and radio-range orientation.

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