doppler 中文意思是什麼

doppler 解釋
多普勒效應
  1. 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。
  2. Recently, color doppler ultrasound has played an adjunctive role in the detection of renal a vm for its non - invasive means and efficiency

    近日,都卜勒超音波夾其非侵犯性及高準確度的優勢,在動靜脈畸型的診斷上,扮演重要的角色。
  3. Laser doppler anemometry, lda

    採用激光多普勒技術
  4. Effect of photo - detector parmeters on the characteristics of phase - doppler sizing anemometry

    多普勒粒子分析系統特性的影響
  5. Compared with traditional contact flow measurement methods, presents the non - contact flow measurement methods, and emphases the application of laser doppler anemometry ( lda ) and particle image velocimetry ( piv ) to flow field measurement

    摘要與傳統接觸式流量測試方法相比較,介紹了非接觸式流量測試方法,重點介紹了激光多普勒技術( lda )和粒子圖像測試技術( piv )在流場測試中運用的原理。
  6. " for his discovery of the doppler effect in canal rays and the splitting of spectral lines in electric fields

    發現極隧射線的多普勒效應以及電場作用下光譜線的分裂現象
  7. Time intervals in systolic period of cardiac cycle assessment by velocity doppler tissue imaging : characteristic findings in normal subjects

    用組織多譜勒評價左右心室收縮期時間間期
  8. The energy centrobaric method is made use of correcting the doppler spectrum, the simulation predicted value of the target velocity is obtained

    用能量重心校正法對多普勒頻移校正,進而得到物體的運動速度的模擬計算值。
  9. 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。
  10. Doppler centroid estimation of sas based on radon transform

    變換的合成孔徑聲納多普勒中心估計
  11. Second, this paper analyzes the time - frequency distribution of the clutter from airborne pulse doppler radar ( pdr ). the side - lobe clutter, which is the main factor to influence the pdr, is analyzed and calculated. based on the simulation of typical geometry of the land, we analyze and discuss the side - lobe clutter and concluded that the dft of can be considered as the phase of the coho

    並且根據各種典型地貌的近似模擬,從統計特性上和頻率域上對脈沖多卜勒雷達的旁瓣雜波進行了分析討淪,還得出脈沖多卜勒雷達的dft可以近似地看作相參積累,並在程序的編制中利用了這一個結論。
  12. Doppler compensation method based on m - sequence signal

    序列信號的多普勒補償方法
  13. The cosmological redshift is not a normal doppler shift

    宇宙學的紅移並不是平常的都卜勒偏移。
  14. Figure 16. a, desmoid tumor in a previous scar. b, color doppler scan of a desmoid tumor in a previous scar revealing some vascularity in the lesion

    圖16 , a ,以前疤痕處的硬纖維瘤。 b ,彩色多普勒掃描以前瘢痕處的硬纖維瘤病變處顯示一些血管供應。
  15. Doppler flow - velocity distributive resolution

    多普勒流速分佈分辨力
  16. Objective to evaluate the feasibility and efficacy of implantation of inferior vena cava ( ivc ) filter under the guidance of color doppler ultrasound and embolectomy for acute deep vein thrombosis

    摘要目的探討下腔靜脈濾器植入聯合手術治療急性下肢深靜脈血栓的可行性和療效。
  17. Conclusion because of its safety and effectiveness, implantation of ivc filter under the guidance of color doppler ultrasound and embolectomy should be promoted

    結論彩色多普勒超聲引導下腔靜脈濾器植入術簡便、安全、經濟、有效,聯合手術取栓對于急性下肢深靜脈血栓治療效果明顯。
  18. Methods the clinical data of 15 patients, who underwent implantation of inferior vena cava filter under the guidance of color doppler ultrasound and embolectomy in our hospital from september 2004 to october 2005, were retrospectively analysed

    方法回顧性分析我院於2004年9月至2005年10月完成的, 15例彩色多普勒超聲引導下腔靜脈濾器植入並手術取栓的,急性下肢深靜脈血栓的患者資料。
  19. Ultrasonic doppler foetal heartbeat detector

    超聲多普勒胎兒心率儀
  20. Ultrasonic doppler foetal monitor

    超聲多普勒胎兒監護儀
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