線分辨力 的英文怎麼說
中文拼音 [xiànfēnbānlì]
線分辨力
英文
line to line resolution- 線 : 名詞1 (用絲、棉、金屬等製成的細長的東西) thread; string; wire 2 [數學] (一個點任意移動所構成的...
- 分 : 分Ⅰ名詞1. (成分) component 2. (職責和權利的限度) what is within one's duty or rights Ⅱ同 「份」Ⅲ動詞[書面語] (料想) judge
- 辨 : Ⅰ動詞(辨別; 分辨; 明察) distinguish; discriminate; differentiate; recognize Ⅱ名詞(姓氏) a surname
- 力 : Ⅰ名1 (力量; 能力) power; strength; ability; capacity 2 [物理學] (改變物體運動狀態的作用) forc...
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In this paper, the concept of acceleration ambiguity function ( aaf ) and acceleration resolution is put forward for the first time. using aaf, the effects of target ' s relative acceleration on several outputs of a linear - phase matched filter are analyzed, such as the output signal - noise - ratio loss, the doppler resolution, the constraint on optimal accumulative time ( opt ) and their tolerable limits
論文首次提出並研究了加速度模糊函數和加速度分辨力的有關概念,並以加速度模糊函數為分析工具,詳細討論了加速度對線性相位匹配濾波器的輸出信噪比的損失程度、對多卜勒頻率分辨能力的影響程度、對最優相參積累時間的約束關系以及線性相位匹配濾波器輸出受加速度影響的容限等問題。To improve this ability, a higher cross - range resolution is needed. an inverse synthetic aperture radar ( isar ) achieves high resolution in the cross - range dimension by taking advantage of the motion between radar and targets to synthesize the effect of a larger antenna aperture
逆合成孔徑雷達( inversesyntheticapertureradar ,簡稱isar )信號處理對接收到的運動目標的回波信號進行相干處理,等價成一個大口徑天線,很大程度上提高了方位向距離分辨力。Based on the doppler effect and pulse coherence technique, synthetic aperture radar ( sar ) breaks through the azimuth resolution limitation imposed by real aperture antenna. in combination with the pulse compression technique, two - dimensional high resolution imagery to distant targets can be realized
合成孔徑雷達( sar )利用以多普勒頻移理論和脈沖相參為基礎的合成孔徑技術,突破了實孔徑天線對方位向分辨力的限制,與脈沖壓縮技術相結合,實現了遠距離目標的二維高分辨成像。Several numerical experiments are carried out to detect the actual steps and limitation for the velocity and depth parameter ' s ray inversion in the fourth chapter, and the we find that : a. the resolution capability of the layer ' s velocity change along both the top and bottom boundary is very poor. thus generally the vertical homogeneous layer model whose top velocity equal to that of its bottom boundary should be considered
本文的第四章通過一系列模型試驗詳細探討了利用射線反演方法反演速度和深度參數的實際步驟,認為走時反演對速度層內頂部和底部速度變化的分辨能力很弱,僅僅依靠走時數據難以反演出層內頂部和底部的速度變化,故一般情況下應採用速度層底部和頂部速度相同的縱向均勻模型。Now the method has application at large. because the laser - produced plasmas are rapidly varying, temporal resolution of spectral features is important to investigation of x - ray radiancy evolvement with time, many dynamic plasma processes and radiation transport. soft x - ray time - resolved diagnosis technology have had quiet great progress since from sixty " s end to seventy " s early
由於激光等離子體變化快,且其x射線輻射的時間特性包含有豐富的物理信息,因此時間分辨的x射線輻射特性診斷是研究激光等離子x射線輻射隨時間的演變,各種動力學過程和輻射輸運等物理問題所必需的關鍵診斷技術。Pulse compression technique and large timeband product signals such as linear frequency modulation signals, nolinear frequency modulation signals, phase coded signals and so on are widely used in modern radar systems to improve the resolving power both in range and in speed domain
現代雷達為了提高雷達作用距離和速度分辨力、距離分辨力,廣泛採用了脈沖壓縮技術及大時寬帶脈壓信號如:線形調頻、非線形調頻、相位編碼信號等。Pulse compression technique is widely used in modern radar systems. it solves the contradiction between the range and velocity resolution. large time - bandwidth product signals such as linear frequency modulation signals ( lfm ) are used in pulse compression technique to improve the resolution in range domain
現代雷達系統廣泛採用脈沖壓縮技術,在確保雷達作用距離和速度分辨力的前提下,採用大時帶積脈沖壓縮信號:如線性調頻( lfm )信號提高距離分辨力。Chirp - subpulse stepped frequency signal is one of the high distance resolution signals with merits of stepped - frequency signal and chirp signal
Chirp子脈沖頻率步進信號兼有頻率步進信號和線性調頻信號的優點,是一種高距離分辨力信號。Chirp signal is a kind of pulse - compressed signal with large time - bandwidth products achieved through linear frequency modulation. it has high resolution in range because of its great bandwidth
線性調頻信號是通過線性頻率調制獲得大的時寬帶寬積的一種脈沖壓縮信號,具有大的帶寬,因此有高的距離分辨力。Briefly, here are main topics of this dissertation : ( 1 ) the relation between the resolving power of the linear frequency modulated continuous wave radar and the linearity of linear frequency modulation signal
同樣,輸出數據也可以通過雙口ram和pci介面輸出。本文的主要工作包括: ( 1 )介紹了線性調頻雷達距離分辨力和調頻線性度的關系。On the other hand, in order to distinguish and identify the targets, and to solve the problems of radar imaging, phased array radar must have also wide instantaneous signal bandwidth
另外,為了提高天線的分辨、識別能力和對多目標成像的能力,相控陣雷達還必須具有大的瞬時信號帶寬。Quantitatively : reciprocal of the value ( generally in minutes of arc ) of the angular separation of two neighboring objects ( points or lines ) which the eye can just perceive as being separate
定量方面:任一空間分辨力的測定結果,例如觀測者恰可察覺分離的兩個相鄰物體(點或線或其他特定刺激)的用弧分表示的角度間隔的倒數。The theoretical results showed that point spread function ’ s distribution and the stray light mainly influenced the space resolving power and the measurement precision of the temperature measurement system, so we supposed some methods, which can improve the space resolving power, and the results proved the space resolution improved from 37 m to 16 m. 2. having made the space resolution come to 16 m, in order to improve the space resolving power more, we used image reconstruction method to reconstruct the
利用這兩種方法,可以將測得的溫度場分佈中被點擴展函數卷積鈍化掉的部分復原回來,實驗測得微小面元溫度分佈在復原后溫度最高值高於復原前最高值,且分佈曲線變窄,較好地提高了系統的空間分辨能力,最終得到真實溫度分佈的最佳估計。Pulse compression technique is widely used in modern radar systems. large timeband product signals such as linear frequency modulation signals ( lfm ), nonlinear frequency modulation signals ( nlfm ), phase coded signals and so on are used in pulse compression technique to improve the resolution in range domain
現代雷達系統廣泛採用脈沖壓縮技術,在確保雷達作用距離和速度分辨力的前提下,採用大時帶積脈沖壓縮信號:如線性調頻( lfm ) 、非線性調頻( nlfm )和相位編碼信號等,提高距離分辨力。Spotlight synthetic aperture radar can efficiently obtain an image with very high azimuth resolution, since its antenna illuminate the fixed target on the ground. bistatic radar is not a new concept and its fundamental principles have been known and demonstrated many years before the development of operational monostatic radar
由於其天線波束始終照射同一目標場景,因此可獲得更大的方位多普勒帶寬和更高的方位分辨力,但實際上由於受數據處理條件、載體運動誤差等因素的影響,方位解析度的提高是有限的。It achieves the electrical measurement of no - electricity ( especially displacement ) through the variation of self - inductance of or mutual inductance of coil. inductive micrometer, with a low cost, high - resolution power, long life and high reliability, has been applied to the measurement of micro - displacement for a long time. it is common that the inductive micrometer is chosen as a preferred instrument in high - precision micro - displacement test
電感微位移傳感器是一種建立在電磁感應基礎上,利用線圈的自感或互感系數的改變來實現非電量(主要是位移)測量的低成本、高精度測量儀,因為其分辨力高、使用壽命長、工作性能穩定,應用於微位移測量己經有很長的歷史,進行高精度微位移測量時選用電感位移傳感器已經成為一種共識。In this thesis, based on this kind of application, we made theoretical analysis and engineering practice on high - precision lfmcw and its signal processing millimeter wave broadband lfmcw radar has quite high theoretical range - precision and distance resolution, however, for the real radar system, the nonideal parameter of its transmitting signal, such as power fluctuation and the nonlinearity in frequency sweep, will result in the decreasing of the practical rang - precision and the distance resolution of radar
本文基於這一應用對高精度lfmcw測距雷達及其信號處理進行了理論分析和工程實踐。毫米波寬帶lfmcw雷達具有很高的理論測距精度和距離分辨力,但對于實際的雷達系統,其發射信號的非理想參數-掃頻功率起伏和掃頻非線性,將使得雷達的實際測距精度和距離分辨力下降。This paper gives a detailed account of the waveform, matched - filter, fuzzy function, resolution in speed, resolution in range and the capacity of anti - interference of the chirp signal. it deals with several methods to produce chirp signal and the advantages and disadvantages of these methods. it describes the working principle and performance of dds, analyses the phase errors initiated by the phase truncation and proposes a new scheme to solve the error
本文詳細介紹了以下幾個方面:線性調頻信號的波形、匹配濾波器、模糊函數、速度分辨力、距離分辨力及抗干擾能力;產生線性調頻信號的幾種方法並簡要分析了各種方法的優缺點; dds的工作原理、性能指標,分析了相位截斷產生的相位誤差,並提出解決這種誤差的新方案;設計了一個產生線性調頻信號的具體電路。Image - line resolution
圖像線分辨力Line to line resolution
線分辨力分享友人