doppler technique 中文意思是什麼

doppler technique 解釋
多普勒超聲技術
  • doppler : 多普勒效應
  • technique : n. 1. （專門）技術；（藝術上的）技巧，技能。2. 手法〈如畫法，演奏法等〉。3. 方法。
  1. 2. the spectrum correcting technique is applied in one dimension distance sidelobe restraining successly and deal with well with this understanding of zero or low doppler frequency and without noise, mussy weaves

    2 、在一維距離旁瓣抑制中成功地應用了譜修正技術，在無噪聲、雜波干擾，零或低多普勒頻率情況下，處理效果良好。
  2. The wind field retrieval data are obtained by plied muscat technique to transact the rude radial velocity data which were observed by dual - doppler radar volume scans

    該資料是用雙多普勒天氣雷達同步立體掃描數據，通過muscat技術，反演出風場。
  3. Because of the presence of the first - order sea echoes with dominant amplitude, the doppler resolution technique which based on the range - velocity transformation is needed to extract the targets information in hf radar

    高頻雷達工作在擁擠的短波波段，由於絕對占優的一階海浪回波的存在，必須採用基於距離?速度譜變換的多普勒頻率分辨技術來處理雜波，以提取目標信息。
  4. Error analysis of doppler radar expanded vad technique

    多普勒雷達vad技術擴展的誤差分析
  5. Doppler radar ; vad technique

    多普勒雷達vad技術
  6. Abstract : we have studied theoretically a beat effect in a four - level system due to fifth - order optical polarization, and considered the cases that the pump beams have either narrowband or broadband linewidth. we have found that the accuracy for the energy - level splitting measurement is determined by the homogeneous linewidths of the optical transitions. that is to say, this technique can achieve doppler - free precision in the measurement of the energy level splitting between two excited states which are dipolar forbidden from the ground state

    文摘:研究了四能級系統中基於五階極化的拍頻效應，考慮了抽運光束為窄帶線寬或寬帶線寬的情形.發現其對能級分裂的測量精度決定於光學躍遷的均勻增寬.也就是說，這種技術在測量與基態是偶極禁戒躍遷的兩激發態之間的能級分裂時，可得到消除多普勒增寬的精度
  7. 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。
  8. This dissertation mainly researches the displaced phase center antenna ( dpca ) technique in the new system, and the contributions are calculated as following : 1. the doppler history is analyzed for the spaceborne bistatic sar, doppler center frequency and doppler fm rate computational methods are studied. summing up is done for the methods of moving target detection and imaging

    本文完成的主要工作有: 1 .分析慢速運動目標信號特徵以及運動目標對sar成像的影響（多普勒中心頻率，多普勒斜率以及距離徙動誤差） ，總結了目前sar運動目標檢測與成像的主要方法。
  9. This thesis discusses the pulse doppler ( pd ) weather radar signal processing system including digital intermediate frequency ( if ) receiver, especially on the application of if sampling and digital demodulation technique in pd weather radar signal processing system, the influence of amplitude and phase unbalances of in - phase and quadrature channels on weather radar echo spectrum estimation, ground clutters elimination algorithms and a typical engineering realization scheme of pd weather radar signal processing system

    本論文研究的是採用數字中頻接收技術的脈沖多普勒氣象雷達信號處理系統，重點研究了中頻采樣及數字解調技術在脈沖多普勒氣象雷達信號處理系統中的應用、正交雙通道幅相不平衡對氣象回波譜估計的影響、地雜波濾波演算法，以及脈沖多普勒氣象雷達信號處理系統的具體工程實現。
  10. The key development of the wind retrieval technique is the application of doppler radar data

    多普勒雷達資料的應用，關鍵之一在於發展風場反演技術。
  11. At last, combining the characteristics of the missle - borne high - prf pulsed doppler radar, this paper analyzed the difficulties and the possible technique approach in detecting and recogniting moving target using missle - borne high - prf pulsed doppler radar

    最後，本文結合彈載高重頻脈沖多普勒體制雷達的特點，分析了彈載pd雷達對機動目標進行檢測、識別的難點及可採用的技術途徑。
  12. As the traditional navigation system ca n ' t satisfy the requirements of the autonomous underwater vehicles ( auv ) navigation and position. we study a depthometer - doppler - aided strapdown inertial navigation system ( ddsins ) in combination of the developments of periodic navigation technique and some practical problem posed by the mathematical and variation of output data of doppler, furthermore, the digital simulation and semiphysica test are made to verify the validity of the algorithm, the main research work are as follows : design of the strapdown inertial navigation system of auv

    由於傳統的導航系統很難滿足遠程水下航行器精確導航、定位的要求，本文在充分考慮使用特殊性的情況下，結合國內、外導航技術發展的實際狀況和發展方向，研究了水下航行器組合導航系統的誤差，重點解決了因多普勒輸出數據周期長和周期時變而給導航計算和濾波器設計帶來的問題，並進行了模擬和實物測試，模擬和實物測試結果表明本文所研究的設計方案合理，可以達到某型水下航行器導航、定位需要的精度。
  13. Doppler rate estimation method based on sub - space projection technique was proposed

    提出了一種基於子空間投影技術的多普勒調頻率估計方法。
  14. Multipath acquisition decide the coarse pn code phase and pick up the available multipath components. following, code tracking confirm the pn code phase precisely and track every multipath component ' s delay drifting due to doppler effect. in this paper, the code tracking technique in spread spectrum communication is introduced

    本論文首先介紹了在擴頻通信中採用的同步跟蹤技術，結合wcdma上行鏈路的特點，提出了適合wcdma上行鏈路的pn碼跟蹤方案，並與現有的多徑搜索和通道估計演算法構成完整的上行鏈路rake接收機方案。
  15. Correlation between partial co2 rebreathing technique and transesophageal doppler for cardiac output monitoring during controlled hypotension

    二氧化碳部分重吸入法與食管超聲多普勒法用於控制性降壓期間心輸出量測定的相關研究
  16. Study of phased array doppler velocity measurement technique

    相控陣多普勒測速技術研究
  17. Real - time production of doppler shift with a minimum precision of 0. 1 hz is realized by means of interpolation on the basis of lookup method ; simulation of doppler spread is realized by using the gaussian shaped fir filter and linear interpolation technique. 3

    在查表法基礎上結合內插技術，實現了最小精度為0 . 1hz的多普勒頻移的實時產生;運用高斯型fir濾波器結合線性內插技術的方法，實現了多普勒擴展的模擬。
  18. Chapter one in this paper gives brief applications of doppler radar, analyses the techniques of wind retrieval ; the second part introduce the methods of dealiasing ; using vad technique, the environmental wind can be extracted. during actual operation, there are two kinds of practice strategies, one is single - elevation vad method, and the other is multi - elevation vad method. there are different between those two methods

    第三章在幾種vad演算法中選擇了一種較好的演算法，分別用實際業務中使用的兩種實施策略：單仰角vad方法和多仰角vad方法進行風場反演，比較了這兩種演算法的反演結果，並提出了融合這兩種方法優點的自適應仰角取樣策略。
  19. Beside routine clinical work, the new machine will be used for the latest research projects undertaken by the division of cardiology. these involve the assessment of cardiac function in patients with a variety of cardiac disorders, the detection of abnormal motion due to shortage of oxygen supply to the heart muscle using a sophisticated colour doppler based technique, and also research into arterial diseases and the effect of various treatments

    這部儀器可廣泛應用於需求量激增的常規臨床檢查，包括測量頸動脈及其它動脈壁的厚度，有效診斷動脈血管病，亦可用於心臟科研究工作計劃，如測量不同類的心臟病患者的各種心臟功能、診斷因心肌缺氧供應而引致的不正常心肌活動，同時又可研究動脈血管病及各種治療的效果。
  20. Research on the principle of torque measurement using laser doppler technique

    一種利用激光多普勒技術測量扭矩的原理研究
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