搜索法測頻 的英文怎麼說

中文拼音 [sōusuǒfǎcèbīn]
搜索法測頻 英文
sweeping frequency measurement
  • 搜 : 動詞1. （尋找） collect; gather2. （搜查） search; ransack
  • 索 : Ⅰ名詞1 （大繩子; 大鏈子） a large rope 2 （姓氏） a surname Ⅱ動詞1 （搜尋; 尋找） search 2 （要; ...
  • 法 : Ⅰ名詞1 （由國家制定或認可的行為規則的總稱） law 2 （方法; 方式） way; method; mode; means 3 （標...
  • 測 : 動詞1. （測量） survey; fathom; measure 2. （測度; 推測） conjecture; infer
  • 頻 : Ⅰ形容詞（次數多） frequent Ⅱ副詞（屢次） frequently; repeatedly Ⅲ名詞1 [物理學] （物體每秒鐘振動...
  • 搜索 : 1 （仔細尋找） search for; ferret about; hunt for; scout around 2 [電子學] hunting; scan; [控] in...
  1. Due to existing signal processing technology ’ s shortage such aslow measurement, narrow measurement range precision and other poor performance, we introduced a high - precise signal processing technology : firstly, to get power spectrum with hanning windowed welch modified periodogram, search its peak value frequency ; secondly, to apply zooming analysis via goertzel algorithm ; at last, to get a highly precise doppler frequency with energy centrobaric rectifying algorithm 。 the simulating result indicated that this technology introduced could get accurate doppler frequency 。 depending on above discussed technology, we designed a signal processing scheme, and developed a signal processing system. the running result showed high performance, verified the feasibility and reliability of the highly precise signal processing technology introduced. in a word, the technology improved ldv ’ s performance such as measurement precision, measurement range, dynamic response time 。 and it will have a wide application foreground

    針對存在的缺點，本文提出了一種應用於激光多普勒測速的高精度信號處理技術，即首先利用加hanning窗的welch修正周期圖演算法得到信號功率譜，搜索其譜峰值頻率，接著利用goertzel頻譜細化演算法對搜索的譜峰進行細化分析，再引入能量重心頻譜校正演算法對細化后的譜峰進行校正分析，從而將離散頻譜分析演算法、頻譜細化演算法和頻譜校正演算法三者有機結合起來，充分發揮各自的優點:通過加hanning窗的welch修正周期圖演算法快速得到功率譜及峰值頻率，通過goertzel演算法獲得分析頻帶的高解析度頻譜，然後通過能量重心校正演算法對細化后的頻譜進行高精度校正，這樣不僅保證了演算法的高效性，而且大大提高了分析的精度。
  2. Visual analysis of human motion has been receiving increasing attention from researchers in the fields of image processing and computer vision during the past few years. it has a lot of applications in virtual reality, smart surveillance system, advanced user interface, motion analysis and video compressing, etc. this paper focuses on the technology of human motion tracking based on video, first, we make a summarization of the domestic and overseas status of the research in this field. on the basis of this, we analyse the technical difficulties of human motion tracking. as most of the existing model - based methods of human motion tracking perform not so good in some situation as they need mannual intervention, and also the precision of tracking is not so satisfying during the research of tracking of walking people because of the self - occlusion of legs, this paper proposes an algorithm of automatic detection and tracking of legs of the walking people based on monocular image sequences, in which we analyse the features of walking people, track the five joints of lower limbs, get various parameters, and then re - construct the walking process. the main research achievement is as follows : 1 ) we propose an algorithm of markerless automatic extraction of leg skeleton. first we divide the video into continuous image sequences, after background subtraction, the satisfying human region could be extracted, then we get a single - connected region by converting the rgb image to binary image and median filtering. afterwards, the contour of lower limbs in the frame with a widest boundingbox is detected, using sobel operator, to find the ankle joint of leg behind according to the features and rules of walking, then, the joint of knee of leg behind, hip, ankle of leg in front, knee of leg in front could be got in turn. so, model of leg skeleton is constructed

    首先將視頻分解成許多連續的靜態圖像幀，經過背景去除，把感興趣的人體區域提取出來，通過二值化，中值濾波等預處理方法得到只有人體的一個單連通區域，然後用sobel運算元檢測出boundingbox最寬幀中人體下半身的輪廓，根據運動規律及特徵找到後腿踝關節點，結合從boundingbox最窄幀中所獲取的腿長依次得到後腿膝關節，跨部關節，前腿踝關節，前腿膝關節四點，從而構建出腿部骨架模型。 2 ）實現了人體步行腿部骨架的跟蹤演算法。在完成對腿部骨架模型的自動初始化之後，本文對跨關節、膝關節及踝關節分別採用運動建模、圓周相交定點演算法、運動預測及預測點周圍搜索rgb相似矩形塊三種方法確定每一幀中其實際坐標，從而重構出腿部骨架的運動過程。
  3. The algorithm for estimating the original searching points in object - oriented video coding

    視頻對象編碼中初始搜索點的預測演算法研究
  4. The second part brings forward a new ar - model - based arm detection method based on features of arm and characteristics of velocity and acceleration of the radar echoes. by establishing two - order ar models, this new detection method computes the poles of models representing different targets, thus estimates the acceleration of the targets so as to determine the nature of the targets. furthermore, this method can not only be applied when the arm is being tracked by radar, but also be put into use in radar ’ s seeking and scanning times

    第二部分則是根據反輻射導彈（ arm ）的特點及其雷達回波信號中速度、加速度等特徵，提出了一種新的基於ar模型的arm檢測演算法，該方法通過建立二階ar模型、估計代表不同目標的模型極點，並由此估算目標加速度來判斷目標性質，該方法不僅可以在雷達已跟蹤上arm后採用，而且適用於雷達搜索掃描時使用，模擬結果表明該方法具有解析度高，對雷達脈沖重復頻率（ pulserepetitionfrequency ， prf ）及積累脈沖數要求不高的特點，在低的prf及少的積累脈沖下，利用該方法仍可有效地識別檢測arm 。
  5. By first reviewing the basic video coding theory and then analyzing kinds of sub - module in video coding system. adaptive overlapped block motion compensation ( aobmc ) is combined with pds technology for temporal prediction. the system composed of hybrid transform coding and motion compensation prediction coding is constructed

    第五章討論了本文運動估計和運動補償方法在視頻編碼中的應用，首先闡述了視頻編碼理論和編碼系統各個子模塊的基本原理，然後在預測性菱形搜索和自適應重疊塊運動補償基礎上運用變換編碼加運動補償的預測編碼方法實現一個混合視頻編碼的方案。
  6. Furthermore, a novel fast motion estimation algorithm for low bit rate video coding is presented to cut down the percentage of motion prediction operation in the whole coding process

    此外本文還提出了一種專門針對低比特率的視頻應用快速的運動搜索方法，它大大降低了運動預測部分在整個編碼運算中所佔的比例。
  7. The method was correlate search and fft carrier detection, which could solve the problem of the capture of the spread spectrum code under the condition of low snr and big frequency offset. we also put forward a method, shift receiving window and correlate with local sequence, which not only could solve the problem of symbol synchronization but also could acquire the statistics of the multipath. then we utilized the results of the channel estimation and the technology of rake receiver to decode the received spread spectrum sequence and acquire rude information

    方案中提出了：相關搜索、 fft檢測信號載波的方法，解決了低信噪比、大頻差條件下擴頻碼的同步捕獲難題；滑動相關完成位同步的方法，解決了低信噪比下的同步問題；在時域利用相關進行通道估計，然後利用rake接收技術完成相關解擴的方法，一定程度上解決了多徑衰落影響解擴性能的問題。
  8. Generally speaking, a coding algorithm must be low complexity and work at high speed. in this paper, the coding methods are studied to increase coding speed. firstly, a novel method based on temporal prediction to detect all - zero dct coefficients is proposed, which can greatly reduce the coding cost and maintain a good tradeoff between correct detecting ratio and false detecting ratio with little additional computation

    本文以h . 263壓縮編碼標準為基本框架，針對其中影響壓縮效率和速度的瓶頸展開研究，包括快速運動搜索演算法的研究、預判零方法的研究以及mmx技術在視頻編碼中的應用等，提出了一種基於時域預測的預判零新方法，在不影響重建視頻質量的條件下具有較高的判別效率，節約了大量dct變換和量化的時間，提高了編碼的速度，達到了實時性要求。
  9. High accuracy correlative detection technology of object signal is to search and detect objects by optical correlation, and it can detect real - timely, recognize automatically and orientate precisely, optical correction processes images at light speed and its device is simple, and fourier transformation can be realized

    高精度光學目標信號相關測試技術，利用光學相關探測方法，對要搜索、探測的目標進行實時探測，自動識別，高精度定位。光學相關是以光速進行的，處理速度快，結構簡單，利用由空間域到頻率域的傅立葉變換來實現的，本文針對如何設計傅立葉變換系統實現光學相關進行研究。
  10. It follows that the description of characteristics of g programming language in labview and the process of building virtual instruments. the paper provides a new spectrum analyzing method of the combination of spread spectrum with fft. at last it gives the arithmetic realization and programming diagram of every part of spectrum monitoring and signal searching

    介紹了labview下如何通過計算機介面獲取數據的過程，數據採集過程中各個參數的演算法選擇；同時闡述了labview平臺下g語言的特點及構建虛擬儀器的過程，然後介紹了信號分析處理部分採用的頻率擴展與fft相結合的頻域分析方法；頻譜監測部分各個模塊的演算法實現；最後給出了信號搜索部分的演算法實現及其原理框圖。
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