the internal focusing telescopes是什么意思

用法例句

Using these models, it studies the potentiality of internal profile controlling of thick reservoirs, compares the effect of water flooding, polymer flooding and weak gel profile controlling in different permeability condition, and analyzes the effecting factors of deep profile controlling in different reservoir condition.

针对大庆油田厚油层地质特点 ,设计了不同的物理模型 ,并利用该模型研究了厚油层层内调剖的潜力以及不同渗透率下 ,水驱、聚合物驱与弱凝胶调剖的效果对比 ,并对不同油藏条件下的深部调剖影响因素进行了分析。

Recognition of radar emitter signal intra-pulse modulation mode based on fractal dimension;

基于分形维数的雷达信号脉内调制方式识别

Through simulating six ordinary intra-pulse modulations radar emitter signal and computing their multifractal generalized dimension under different condition, the results indicate that multifractal generalized dimension is insensitive to noise, and for same modulation mode modulation para.

通过仿真六种常见脉内调制雷达辐射源信号,并计算它们在不同情况下的多重分形广义维数,结果发现多重分形广义维数对噪声不敏感,同时,同一种调制方式下调制参数对广义维数的影响也不大。

To recognize Pulse-Doppler radar exactly and quickly,coherence,intra-pulse modulation feature and pulse repetition frequency are selected and extracted.

为了准确快速地对脉冲多普勒雷达进行识别,选择3个具有代表性的参数:相参性、脉内调制特性及脉冲重复频率进行提取,并讨论了各参数提取的几类理论研究和比较成功的应用方法,分析了脉冲多普勒雷达识别技术中存在的难点及发展方向。

Radar signal in pulse modulation identification is the important content of radar reconnaissance.

雷达信号脉内调制识别是雷达侦察的一个重要内容,基于瞬时频率的识别技术可以实现对多种调制类型信号的识别及参数提取,该方法在一定信噪比条件下有较高的正确识别率,算法也较为简单,适合在雷达对抗侦察数字接收机上高速实现。

Especially,in pulse modulation identification under low SNR is a hot point of recent researching.

脉内调制类型识别是雷达侦察的关键技术之一,特别是低信噪比下的脉内调制识别技术是当前研究的热点。

Radar signal in pulse modulation identification is the important content of radar reconnaissance.

雷达信号脉内调制识别是雷达侦察的一个重要内容,基于瞬时频率的识别技术可以实现对多种调制类型信号的识别及参数提取,该方法在一定信噪比条件下有较高的正确识别率,算法也较为简单,适合在雷达对抗侦察数字接收机上高速实现,分析表明此方法是侦察雷达信号的有效手段。

Theoretical study of an inter-phasing pulse tube cooler;

内调相型脉管制冷机的理论分析