propeller-driven aircraft造句
例句与造句
- Compared with jet planes and propeller - driven aircrafts , the radar echoes of helicopters have different characteristics
与喷气式飞机和螺旋桨飞机相比，直升机的雷达回波具有不同的特点。 - In addition , the characteristics of radar echoes from propeller - driven aircrafts are discussed . trough experiments the modulation effect of propeller echoes , its influence , the relationship between its influence and other factors are analyzed
通过试验分析了螺旋桨子回波的调制作用，并研究了螺旋桨子回波的影响大小，分析了影响大小与各种因素的关系。 - To learn about the characteristics of the radar target data is a prerequisite to ratr . so this dissertation process a lot of measured and simulated data , and make a detailed analysis on the characteristics of the radar echoes from jet planes , propeller - driven aircrafts and helicopters . the results can be used in ratr and lay the foundations for the future research
进行目标识别必须对获得的目标数据特性有充分的了解，本文正是在这样的研究背景下，使用大量的实测和仿真数据，详细分析了喷气式、螺旋桨和直升机三类飞机目标的雷达回波特性，得到了一系列对目标识别有用的结果，为进一步的目标识别工作打下基础。 - This paper studies the helicopter , the propeller - driven aircraft and the turbofan jet airplane echo modulating feature parameter model and analyses the echo signal feature . it gains the target echo ’ s the cyclical modulation feature by using the complex ar frequency range bispectrum slice . because traditional method in extraction airborne radar ’ s radiant signal feature time has certain insufficiency , this paper proposes the approximate entropy and the norm entropy as the passive feature parameter in the airplane
由于传统方法等在提取机载雷达辐射源信号特征的时候存在着一定的不足,本文提出把近似熵和范数熵作为飞机目标识别的无源特征参数,给出了提取相应特征熵的算法,实现对机载雷达辐射源信号的识别,通过和机载雷达类型的匹配,实现对目标的识别。 - It's difficult to find propeller-driven aircraft in a sentence. 用propeller-driven aircraft造句挺难的