hovering helicopter造句
造句與例句
手機(jī)版
- An automatic detection method of hovering helicopter
一種懸停直升機(jī)的探測(cè)方法 - Detection of hovering helicopter with binary hough transform
變換法檢測(cè)懸停直升機(jī) - Radar detection of hovering helicopter
懸停直升機(jī)的雷達(dá)探測(cè)技術(shù) - Recognition of a hovering helicopter
懸停直升機(jī)的識(shí)別 - Analysis of simulation of characteristics and detection of echo from hovering helicopter
懸停直升機(jī)回波特性與檢測(cè)仿真分析 - 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(jī)的探測(cè)是一個(gè)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(shí)，要從盤旋空中的直升機(jī)利用吊帶登陸山頭，卻是一項(xiàng)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(shí)，要從盤旋空中的直升機(jī)利用吊帶登陸山頭，卻是一項(xiàng)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(duì)直升機(jī)旋翼的雷達(dá)回波進(jìn)行建模和分析，在此基礎(chǔ)上提出一種懸停直升機(jī)積累檢測(cè)新方法即低通濾波和多級(jí)假設(shè)檢驗(yàn)相結(jié)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(jī)為例，詳細(xì)分析了直升機(jī)雷達(dá)回波的時(shí)域、頻域和時(shí)頻分布的特性，并根據(jù)這些特點(diǎn)提出了雷達(dá)探測(cè)武裝懸停直升機(jī)的初步方案。 - It's difficult to see hovering helicopter in a sentence. 用hovering helicopter造句挺難的
- 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(duì)懸停直升機(jī)旋翼回波的時(shí)頻域特點(diǎn)，探討了從回波信號(hào)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(chǔ)上完成了彈載高重頻脈沖多普勒體制雷達(dá)對(duì)懸停直升機(jī)回波信號(hào)的識(shí)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(duì)雷達(dá)檢測(cè)性能的影響，提出了一種應(yīng)用于多徑效應(yīng)環(huán)境中檢測(cè)目標(biāo)回波的修正mm檢測(cè)結(jié)構(gòu)并應(yīng)用于懸停直升機(jī)的檢測(cè)過程，分析了該算法的檢測(cè)性能及其與檢測(cè)結(jié)構(gòu)的關(guān)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(jī)回波信號(hào)的時(shí)域特性和頻域特性，結(jié)合彈載高重頻脈沖多普勒雷達(dá)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(dá)對(duì)懸停直升機(jī)進(jìn)行檢測(cè)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(jié)合國防科技重點(diǎn)預(yù)研項(xiàng)目“毫米波主動(dòng)尋的制導(dǎo)目標(biāo)識(shí)別” ，針對(duì)脈沖多普勒體制雷達(dá)導(dǎo)引頭的應(yīng)用背景，對(duì)基于彈載高重頻脈沖多普勒體制雷達(dá)的信號(hào)處理方法進(jìn)行了較深入的研究。主要研究?jī)?nèi)容包括對(duì)雜波背景中的機(jī)動(dòng)目標(biāo)以及對(duì)懸停直升機(jī)的檢測(cè)和識(shí)別方法。
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