湖南省国土资源遥感综合调查信息系统是一个数据可动态更新的运行系统。
Information system of remote sensing integrated survey about land resources in Hunan province is an operable system in which data can be updated dynamically.
提出了一种适用于基于电压源换流器的直流输电系统的混合调制方式，可满足输电系统的暂态响应和稳态特性的需求。
A hybrid modulation method is proposed for the HVDC system using voltage sourced converter (VSC) technology, which performs satisfactorily both in steady state and in dynamic state.
以紫外荧光灯为光源，结合调频和鉴频技术可实现低速率下的紫外通信。
Using ultraviolet fluorescent lamp as the light source, combining frequency modulation and demodulation technology can achieve a UV communication system with low date rates.
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