相位變化率 的英文怎麼說

中文拼音 [xiāngwèibiànhuàlǜ]
相位變化率 英文
phase change rate
  • 相 : 相Ⅰ名詞1 （相貌; 外貌） looks; appearance 2 （坐、立等的姿態） bearing; posture 3 [物理學] （相位...
  • 位 : Ⅰ名詞1 （所在或所佔的地方） place; location 2 （職位; 地位） position; post; status 3 （特指皇帝...
  • 率 : 率名詞（比值） rate; ratio; proportion
  • 相位 : phase position; phase
  1. By making some assumptions, collision frequency were presented. then the the flocculation kinetics model was established through population balance equation. comparison of experimental data and modeling results indicate that there are the same trend between the two. so the model can predict floes number and size during flocculation of yellow river ' s loess particles without using empirical parameters. the tem and sem were used to obsever floes in the study of floe structure. the flocculation was divided as flocculi, floc and floe aggregate. the floes structure model was established by assumption that particles position in floe accords with tetrahedron. the fractal dimension of model and experimental floes was found to be coincidentso the model can reflect the structure of flocs formed in flocculation of yellow river ' s loess particles by macromolecule flocculant at a certain extent

    最後，本文還對絮凝動力學和絮體結構進行了研究，在前人研究的基礎上，針對高分子絮凝黃河泥沙，對絮凝過程作了一些符合試驗條件的假設，建立了顆粒碰撞頻率表達式，應用了顆粒數量平衡方程，從而建立了絮凝過程的動力學生長模型，模型計算結果與試驗數據對比表明，二者趨勢一致，在沒有使用經驗參數的情況下基本上能夠描述黃河泥沙絮凝過程中絮體數量和尺寸分佈的變化過程；對絮體結構的研究中，應用掃描電子顯微鏡和透射電子顯微鏡對絮體進行了觀察，將絮體分為絮粒、絮團和絮網三個不同的生長階段，通過假設顆粒結合位置符西安建築科技大學博士學位論文合正四面體，建立了絮體結構模型，計算得到的模型絮體分形維數基本與試驗中的實際絮體相符，在一定程度上能夠反映高分子絮凝黃河泥沙生成的絮體結構。
  2. E., the carrier frequency of a gaussian beam deviates from the resonant frequency of a fabry - perot etalon ), variations of the peak intensity, the position of the peak intensity and the dwdm systems, has received considerable attention. in this work, after taking into account the wavelength - depended reflectivity distribution profile of a fiber bragg grating, the oscillation wavelength # _ ( 1 ) of long external cavity fiber bragg grat

    與共振情況（即高斯光束的載波頻率與法布里一拍羅濾波器的諧振頻率一致）相比，非共振條件（即高斯光束的載波頻率與法布里一拍羅濾波器的諧振頻率存在偏差）一透射光束的峰值強度、峰值強度所對應的位置、以及光斑的大小隨入射角的變化都發生了顯著的改變。
  3. Abstract : the far - field spot characteristics of laser converted by random phase plate are analyzed theoretically, including the shape, size, rotational symmetry and diffractive efficiency of the spots, as well as the distribution of subsidiary spot. by comparing the influence of phase element shape ( triangular, square and hexagonal ) on the characteristics, we found that the random phase plate with hexagonal array structure is more suitable for the beam smoothing in laser fusion

    文摘:從理論上分析了激光經隨機位相板變換后在遠場的光斑特性（包括光斑的形狀、大小、旋轉對稱性、衍射效率以及旁瓣分佈） ，通過比較三種形狀位相元（等邊三角形、正方形和正六邊形）的遠場光斑特性，得知正六邊形位相元結構的隨機位相板更適合於激光聚變中的束勻化。
  4. In this thesis, firstly, we put forward a new algorithm of the synchronization of carrier reference phase, that is to use the curve synthesizing with the general digital carrier phase looper to have an estimation on carrier frequency within 10 ms so as to meet the need of meteor burst communication. we have done some simulations to get the performance of carrier frequency estimation using two modulation modes ( 16qam and 4 - qpsk ), and had some test on the carrier phase looper in conditions when using different baud rate transmission and when the baud tuning have windage

    我們對兩種正交調制方式（ 16qam和4 - qpsk ）進行了模擬工作並給出了模擬結果，同時討論了碼元同步定時誤差對鎖相環路工作的影響並根據流星通信中使用變速率傳輸時鎖相環路的載波同步性能進行了測試；然後在基於軟體無線電思想的數字處理平臺（該數字處理平臺實現了中頻數字化）上用dsp軟體完成了載波的相位跟蹤。
  5. Backed up by the soplat theory based on particle kinematics, the second chapter of this paper presents with analysis and simulation of several single observer passive measurement models, which uses such relative movement parameters as bearings changing rates and centrifugal acceleration information on the basis of bearings measurements. in the third chapter, the observability of location respectively using bearings and its changing rates information and centrifugal acceleration information is analyzed, and its observable condition is got. the fourth chapter puts forward the modified covariance extended kalman filtering ( mvekf ) against the defect of traditional extended kalman filtering ( ekf ), whose performance is simultaneously compared in the chapter with the performance of ususal tracking algorithm such as ekf, mgekf, iekf by computer simulation

    在近年來提出的基於質點運動學原理的單站無源定位理論基礎上，本文第二章提出了幾種在角度測量的基礎上增加角度變化率及相對運動的離心加速度等運動學參數的單站無源測量模型，並對它們進行了分析和模擬；第三章分別對利用角度及其變化率信息定位和利用離心加速度信息定位的可觀測性進行分析並得到了相應的可觀測條件；第四章針對傳統擴展卡爾曼（ ekf ）方法的缺點，提出了一種修正協方差的擴展卡爾曼濾波（ mvefk ）方法，並將其和ekf 、 mgekf 、 iekf等常用的單站無源定位濾波方法進行了性能模擬比較；第五章通過引入雷達機動目標跟蹤方法和模型，提出了利用角度及其變化率對機動輻射源跟蹤的多級噪聲自適應方法和imm方法；第六章主要對角度變化率和離心加速度參數的獲取技術進行了研究，提出了幾種高精度測量脈沖序列多普勒頻率變化率的方法。
  6. The single - observer passive locating method with phase difference rate of change and some key technologies - are studied in this dissertation on the applying background of locating remote slow offing targets with fast plane. this dissertation is outlined as follows

    本文面向快速運動的空中觀測平臺對海面慢速運動目標定位的特定應用背景，利用相位差變化率方法進行了單站無源定位體制和關鍵技術的理論研究。
  7. In view of the regression characteristic and the configuration maintenance demand of the regional coverage satellite constellation, the constellation configuration is optimized using the linear relations between the semi - major axis and inclination and the rates of change of the ascending node right ascension and phase, which enhance the long - term stability of the satellite constellation configuration, simultaneously the sub - stellar and the phase are controlled through changing the deviations of the semi - major axis and the inclination

    摘要針對區域覆蓋衛星星座的回歸特性和構型維持需求，利用軌道半長軸和傾角與升交點赤經漂移和相位角漂移變化率之間的線性關系來優化星座構型參數，提高衛星星座構型的長期穩定性，同時通過協同控制軌道半長軸和傾角漂移量來實現區域覆蓋星座構型維持。
  8. It combines the advantages of ultrasound and optical technology. ultrasonic wave scatters much less in biological tissue than light wave and can be used as a localizer in tissue. the diffused photons tagged by the ultrasound in the focal zone will be collected and used for image

    超聲調制主要是使散射介質內的散射粒子的分佈以及光學特性發生變化，比如說使介質的折射率發生改變而導致光學相位變化，結合散射和自相關理論可以解釋一些超聲調制多重散射光的現象。
  9. With the meteorological and hydrographic data in songhuajiang and nenjiang valley from 1951 to 1995, using correlation analysis and empirical orthogonal analysis, the rule of the flood and relation between flood and precipitation distribution in this region are discussed. the results show that periodic change of water level is obvious in this region. now water level is in the serious stage from 1980 ' s. there are great relation between the water level of flood period and the precipitation. the unusual precipitation of nenjiang valley has greater impact than that of second songhuajiang valley. at the summer in 1998, songhuajiang and nenjiang valley encountered the ghastly flood and the reason for that is the anomalous precipitation great exceeding the historic maximum

    利用松花江，嫩江流域1951 1995年期間的氣象和水文資料，採用相關分析，經驗正交分析等方法，討論了該流域洪澇發生的規律及其與流域內降水分佈的關系.文章指出，江流域的水位變化有明顯的階段性，且具有全流域一致的特性，目前正處在80年代以來洪澇較嚴重的階段;嫩江流域降水異常偏多對松花江洪澇的影響比第二松花江的作用要大; 1998年夏季，松花江，嫩江流域出現超歷史紀錄特大洪水的關鍵原因是嫩江流域6 8月的降水距平百分率遠遠超過了歷史上的的最大值
  10. Abstract : the paper proposes a mathematical model of a / d converter with quantizing error, nonlinearity and differential nonlinearity errors for computer simulation, and based on the model, the errors caused by voltage change, current change and phase change in the power measurement are analyzed by computer simulation for both the asynchronous and quasi - synchronous sampling algorithms

    文摘:本文提出了具有量化誤差、非線性誤差和微分非線性誤差的a / d轉換器的數學模型，在該數學模型的基礎上，模擬分析了非同步采樣法、準同步采樣遞推演算法各種情況下的誤差，包括功率測量中電壓線性、電流線性、相位變化誤差及電壓測量的誤差。
  11. Compared with host film, thickness and porosity of composite film change not much, while average and maximum pore size decrease, and pore size distribution range become narrow. further more, controlling reaction time can control the content of in - situ transforming fe3o4

    結果表明，採用膜相滲透原位化學轉化法合成制備的fe3o4 / pvdf復合膜，其膜厚、孔隙率與原來的pvdf基體膜相比變化不大，平均孔徑、最大孔徑則有明顯減小，孔徑分佈范圍變窄，孔徑更趨于均勻，膜孔形態更為規整。
  12. The emphasis was put on the main factors affecting its performance, such as : drift of the average frequency of interferometer ; drift of frequency difference of interferometer ; the changes of the interference add - on term of the gaussian beam during the measurement and its effects on the phase changes, as well as the relationship between the changes of the interference add - on term of the gaussian beam during the measurement with the movement of the measurement mirror

    對雙頻激光干涉儀的工作原理進行了理論分析，著重分析了其主要影響因素：雙頻激光平均頻率漂移；雙頻激光差頻漂移；高斯光束干涉附加項在測量過程中的變化及其對相位變化的影響，與測量鏡運動引起的程差變化的關系。
  13. 8 the frequency responses of a function are the plots of the amplitude and phase of this function versus frequency that are called the amplitude response and the phase response

    頻率特性是這個函數的大小和相位隨頻率的變化曲線（情況） ，分幅頻特性和相頻特性。
  14. A fast algorithm for wavelet transform is also proposed and applied in the extraction of the phase change rate for complex wavelet transform of stable - state stator current, which can detect broken rotor bar faults effectively

    本文將該快速演算法應用到電機穩態電流信號復值小波變換的相對相位變化率提取中，用以診斷異步電機的轉子故障。
  15. The dynamic bit rate allocation module receives relevant data from the loss rate of multi - media data packet, jitter, delay, and compares these data with predefined values to make one of these 3 decisions that : decrease the video bit rate ( stat = decrease ), or maintain current video bit rate ( stat = hold ), or increase video bit rate ( stat = inccease ). the video bit rate will be adjusted according to the decision and the total bit rate is changed accordingly. in this way the impact of network environmental variation is settled, and consequently the adaptability of videoconference systems in remote education area is improved

    整個模型從rtcp協議獲得多媒體數據包丟失率（ lossrate ） 、抖動（ jitter ） 、延時（ delay ）的相關數據，這些數據與預先設定好的閥值作比較，得出減小視頻位速率（ stat = dectease ） 、維持視頻位速率不變（ stat = hold ）或增大視頻位速率（ stat = increase ）的決定，模塊根據這些決定對視頻位速率進行相應的調整，從而總的位速率也相應變化，這樣可以減小由於網路環境變化而帶來的影響，從而提高視頻會議在遠程教育應用中的實用性。
  16. So lead to their polarization behavior not as good as edge lasers. the paper researched the polarization of vcsel theoretically and experimentally, the main work is as follows : part. without consideration the applied strain and temperature, we resolved numerically the maxwell - bloch equation through four - energy level polarized dynamic model

    通過四能級偏振動力學模型，在不考慮外加應變以及溫度的前提下，對maxwell - bloch方程進行數值求解，研究了隨著注入電流以及各向異性的變化引起的vcsel的出射偏振光的強度、頻率和相位變化。
  17. The improved method is used to predict the existence and the approximate location of the crack by using relative changes of frequencies and modal shapes of the damaged platform, in the absence of parameters of the intact structure

    提出了利用2次測量頻率變化量的頻率檢側方法，在無未損傷模型參數的情況下也可以發現損傷的存在，並對損傷進行初步定位；同時提出利用不完全振型的相對變化，判斷某些構件的斷裂。
  18. The method of calculating the change rate of the vtec using phase data is introduced. with the help of this efficient method, the solar flare is analyzed in this thesis

    介紹了利用載波相位觀測值求解電子總量變化率的方法，並利用這種方法的計算結果對耀斑進行了分析。
  19. Based on the configure of direction finding, the location method, algorithm, accuracy and performance for multistations and single station are studied in this thesis, and the computer simulation results are given out. it is important of resolving the performance of antenna array. a technique to estimate and calibrate the performance is developed in this page

    本文以測向系統的組成為基礎，研究了單平臺情況下利用到達方向、到達時間差、多普勒頻率差、相位變化率等參數的測向方法、測向演算法、測向精度和性能，並進行了計算機模擬，為無源測向系統的設計和實施提供了重要的理論基礎和實驗數據。
  20. During the time shown in the chart in figure 9. 2, the stocks changed places a number of times in their relative rate of change

    這段時間的圖表顯示見圖9 . 2 ，可以發現，這些股票相對變化率的排位有多次的改變。
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