radar helicopter 中文意思是什麼

radar helicopter 解釋
雷達巡邏直升機
  • radar : n 〈美國〉【無線電】 〈radio detecting and ranging 之略〉 雷達，無線電探測器 （＝〈英國〉 radiolo...
  • helicopter : n 直升機。vt 用直升機載送。 helicopter sb aboard the ship 用直升機把某人送到船上。vi 乘直升機。n ...
  1. The twin squirrel helicopter was heading to a private landing site near peterborough, cambridgeshire, when it vanished from radar

    那部直升機原計劃飛往劍橋郡的彼得堡附近的一個私密降落點，但在途中它從雷達中消失。
  2. Radar detection of hovering helicopter

    懸停直升機的雷達探測技術
  3. 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。
  4. 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，對基於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。
  5. Positioning accuracy analysis of helicopter - borne radar reconnaissance system

    直升機載雷達偵察系統目標定位精度分析
  6. Cops use helicopter to catch speeding in inter - state highway. they use radar to lock the speed and radio to the roadblock ahead

    差佬響號追都唔停車?要攪到用直升機追?你個女同學一系膽生毛，一系十下十下，差佬追都唔知! !
  7. 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

    由於傳統方法等在提取機載雷達輻射源信號特徵的時候存在著一定的不足，本文提出把近似熵和范數熵作為飛機目標識別的無源特徵參數，給出了提取相應特徵熵的演算法，實現對機載雷達輻射源信號的識別，通過和機載雷達類型的匹配，實現對目標的識別。
  8. 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模擬軟體，以美製「阿帕奇」直升機為例，詳細分析了直升機雷達回波的時域、頻域和時頻分佈的特性，並根據這些特點提出了雷達探測武裝懸停直升機的初步方案。
  9. 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。
  10. 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，提出了一種應用於多徑效應環境中檢測目標回波的修正mm檢測結構並應用於懸停直升機的檢測過程，分析了該演算法的檢測性能及其與檢測結構的關系。
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