hovering helicopter造句
例句與造句
- An automatic detection method of hovering helicopter
一種懸停直升機的探測方法 - Detection of hovering helicopter with binary hough transform
變換法檢測懸停直升機 - Radar detection of hovering helicopter
懸停直升機的雷達探測技術 - Recognition of a hovering helicopter
懸停直升機的識別 - Analysis of simulation of characteristics and detection of echo from hovering helicopter
懸停直升機回波特性與檢測仿真分析 - It's difficult to find hovering helicopter in a sentence. 用hovering helicopter造句挺難的
- It is very urgent to solve the problem of detecting low - altitude , slow - speed and hovering helicopters
低空慢速、懸停武裝直升機的探測是一個迫切需要解決的課題。 - However , a recent task to select a site for a new weather station on lantau island was quite a challenge to me - i had to be winched down from a hovering helicopter
但最近我到大嶼山為新氣象站選址時，要從盤旋空中的直升機利用吊帶登陸山頭，卻是一項前所未有的挑戰(zhàn)。 - However , a recent task to select a site for a new weather station on lantau island was quite a challenge to me - i had to be winched down from a hovering helicopter
但最近我到大嶼山為新氣象站選址時，要從盤旋空中的直升機利用吊帶登陸山頭，卻是一項前所未有的挑戰(zhàn)。 - Abstract : the radar echo of a helicopter rotor is modeled and analyzed theoretically at first , then a new method is proposed to detect hovering helicopter by using low - pass filter and multilevel hypothesis examination
文摘:首先對直升機旋翼的雷達回波進行建模和分析，在此基礎上提出一種懸停直升機積累檢測新方法即低通濾波和多級假設檢驗相結合的方法。 - By the use of “ radar target backscattering simulation software ” and through many flight mode and research mode experiments with the u . s . - made helicopter ah - 64 as an example , a detailed analysis of helicopter echoes ’ time , frequency domain and time - frequency distribution characteristics is made . finally , according to these features , a tentative plan to detect hovering helicopters is proposed
本文利用專門的電磁仿真軟件，以美制“阿帕奇”直升機為例，詳細分析了直升機雷達回波的時域、頻域和時頻分布的特性，并根據(jù)這些特點提出了雷達探測武裝懸停直升機的初步方案。 - At last , pointing to the temporal characteristics and the spectral characteristics , this paper discussed the methods for estimating the maximal line velocity ( vmax ) and the glint periods ( tp ) of the hovering helicopter , and then fulfilled the recognition of hovering helicopter using these two message . in chapter 5 , the summary of all the works in the paper and related conlusions are presented , and the defects are analized at last , at last this paper demonstrated the d
最后，本文針對懸停直升機旋翼回波的時頻域特點，探討了從回波信號中提取旋翼回波最大線速度v和旋翼回波閃爍周期tp的方法，在綜合利用這兩種信息的基礎上完成了彈載高重頻脈沖多普勒體制雷達對懸停直升機回波信號的識別。 - Then combining the idea of likelihood ratio detection and the template matching method , this paper put forward a matching detection method for detecting hovering helicopter using missle - borne pulsed doppler radar . in the third part of this paper , the author analized the effect of multipath to the detection using radar , and put forward a modified m n detection structure to the detection of hovering helicopter under multipath circumstance
本章的第三部分闡述了多徑干擾對雷達檢測性能的影響，提出了一種應用于多徑效應環(huán)境中檢測目標回波的修正mm檢測結構并應用于懸停直升機的檢測過程，分析了該算法的檢測性能及其與檢測結構的關系。 - At last , this paper put forward a recognition method using the parameter of moving target the missle - borne pulsed doppler radar can be achived and the hmm and the analized the limited performance of the method under different circumstance . in chaper 4 , this paper analized the temporal chracreristic and spectral chracterisc of hovering helicopter , and then analized the possible methods for detection hovering helicopter and the message that can be achived
第四章中，本文首先分析了懸停直升機回波信號的時域特性和頻域特性，結合彈載高重頻脈沖多普勒雷達的一些具體參數(shù)分析了利用彈載高重頻脈沖多普勒雷達對懸停直升機進行檢測的可能途徑和可利用信息。 - Combined with the key project of the preliminary research of national defence science and technology , the target recognition system for millimeter wave initiative homing guidance , a systematic study on the signal processing method based on the background of millimeter mave ( mmw ) missle - borne pulsed doppler radar is performed . it include specifically the detction and the recognition of the moving target and hovering helicopter under strong clutter background
本文結合國防科技重點預研項目“毫米波主動尋的制導目標識別” ，針對脈沖多普勒體制雷達導引頭的應用背景，對基于彈載高重頻脈沖多普勒體制雷達的信號處理方法進行了較深入的研究。主要研究內容包括對雜波背景中的機動目標以及對懸停直升機的檢測和識別方法。