正交譜 的英文怎麼說

中文拼音 [zhēngjiāopǔ]
正交譜 英文
quadrature spectrum
  • 正 : 正名詞（正月） the first month of the lunar year; the first moon
  • 交 : Ⅰ動詞1 （把事物轉移給有關方面） hand over; give up; deliver 2 （到某一時辰或季節） reach （a cert...
  • 譜 : Ⅰ名詞[書面語]1 （按類別或系統編成的書或冊子等） table; chart; register 2 （指導練習的格式或圖形）...
  1. The spectral analysis of non - orthogonal functions cannot be obtained by orthogonal integration method. only the spectral analysis of some particular non - orthogonal functions can be realized by integral transformation. thus, the concept of reflection matrix is proposed and the mirror symmetry of spectral analysis for non - orthogonal function is revealed. any element functions whose reflection matrix can be obtained possesses its inverse element function. the spectral vector corresponding to an element function possesses its inverse spectral vector corresponding to the inverse element function. by reflection matrix the mapping relation of element function pair and spectral vector pair can be established. spectral analysis of non - orthogonal functions can be obtained with this symmetry by using the integration method as in the case of orthogonal functions, instead of calculating the inverse matrix as usual. so a convenient and practical method for spectral analysis of non - orthogonal functions is offered

    非正交函數不能利用正交積分來實現譜分解.僅有某些特殊的非正交函數可以通過積分變換實現譜分解.本文提出了反射陣的概念，揭示了非正交函數譜分析的鏡像對稱性.任何能夠建立起反射陣的元函數存在著它的逆元函數，並且任何基於該元函數的譜向量同時也存在著基於逆元函數的逆譜向量.元函數對與譜向量對通過反射陣建立映射關系.利用這種對稱性，非正交函數可以象正交函數一樣使用積分方法獲得譜分解結果，而不必使用求解逆陣的方法，從而為非正交函數的譜分解提供了便捷、實用的方法
  2. An orthogonal frequency divided group code for cp - cdma system : comb spectrum code

    一種用於cp - cdma系統的正交頻率分組碼：梳狀頻譜碼
  3. Under the appropriate conditions of sampling equipment of gas chromatographic headspace analysis, determine a suitable salt and a suitable extracting solvent by the orthogonal design method, then determine the fitting feed composition of ethanol - water mixture, the fitting distribution between extracting solvent and mixture, and the fitting salt concentration by the uniform design method

    在對建立的頂空氣相色譜采樣裝置的操作條件進行優化之後，先用正交試驗設計法確定非連續性因素鹽和萃取劑及其在備選水平中的適宜水平，再用均勻試驗設計確定連續性因素乙醇的進料濃度、萃取劑配比和加鹽量及其備選水平中適宜的水平范圍。
  4. Expanding the system ' s hamiltonian to a real symmetric matrix in an appropriate orthogonal basis vector and then diagonalizing it, we get the energy spectrum of the system and calculate the energy level spacing distribution function and the spectral rigidity. then we study the statistical character of the energy spectrum under the changing of magnetic field intension and find that the system ' s motion transfers from regular to chaos gradually

    將系統的哈密頓量在一個適當的正交基矢下展開並對角化，得到系統的能譜，分別計算系統能譜的能級間距分佈函數和譜剛度，研究了該系統量子能譜的統計特徵隨磁感應強度大小的改變而表現出的系統運動由規則到混沌的漸進變化。
  5. First of all, the mathematical development and extensive computer simulation are used to analyze the influence of amplitude and phase unbalances of in - phase and quadrature channels on weather radar echo spectrum estimation

    首先對回波正交雙通道幅相不平衡對氣象回波譜估計的影響進行了詳細的理論推導和計算機模擬。
  6. 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。
  7. Some characteristics of the measured wind pressure field were discussed, including distributions of wind pressure, the effects of shape ratio on total wind force coefficients, auto - and cross - power spectral density ( psd ) distributions of fluctuating wind pressure, characteristics of the proper orthogonal decomposition ( pod ) results of the measured wind pressure field, effects of reynolds number on wind pressure distributions, etc

    根據測量結果對殼體表面風壓場特性進行了分析，包括風壓系數、整體風力系數、脈動風壓自功率譜及互功率譜、風壓場本徵正交分解特性、雷諾數對殼體表面風壓分佈的影響等。
  8. In order to increase the efficiency on using limited frequency resource, orthogonal polarization is normally adopted for frequency reuse, thus offering double bandwidth at the certain working band

    為了充分利用有限的頻譜資源，衛星通信採用正交極化頻率復用方式，在給定的工作頻段上提供雙倍的使用帶寬。
  9. Multiple - input multiple - output ( mimo ) technique, offers an effective way to combat and even exploit fading. another technique, orthogonal frequency division multiplexing ( ofdm ), proposed in 1960s, now has gained much attention with its ability to reduce system complexity

    而60年代提出的正交頻分復用（ ofdm ）技術，由於能夠顯著簡化系統接收機的設計並具有優越的頻譜效率，近十多年來也獲得了極大的關注。
  10. Design of all phase dft digital filter using matlab

    可以直接進行譜分解用於設計二通道完全重建正交鏡像濾波器
  11. As a high band - efficiency digital modulation scheme, dvbc ( digital video broadcasting of cable ) qam ( quadrature amplitude modulation ) modulator is widely adopted in the wide - band communication area, such as hdtv broadcasting, cable modem, microwave communication, satellite communication and so on

    正交幅度調制器（ qammodulator ）作為一種高頻譜利用率的數字調制方式，在高清晰度電視（ hdtv ）廣播、 cablemodem 、固定寬帶無線接入、衛星通信、數字微波傳輸等寬帶通信領域得到了廣泛應用。
  12. Ofdm, with the advantage of high spectrum efficiency and easy realization, can strongly combat multi - path and dispersive channel interference, so its application is remarkable in recent years

    正交頻分復用（ ofdm ）技術具有抗多徑時延、抗通道衰落、頻譜利用率高、硬體實現簡單等優點，近年來受到廣泛關注。
  13. In the paper, firstly, present the formulation and application of proper orthogonal decomposition of covariance and cross - power spectral density matrices are presented in the analysis of wind load effects on structures. then the dynamic response of linear structures subjected to random loads is analyzed by a technique called double modal transformation ( dmt ) that is expressed through a double series whose terms depend on structural and loading modes

    本論文中首先通過求相關矩陣和互功率譜密度矩陣特徵值問題給出了本徵正交分解的公式，並利用pod與結構模態相結合的雙模態方法來分析結構的動態響應，主要討論了截斷高階荷載模態對風致響應的影響。
  14. Dynamic characteristic of orthogonal vierendeel dome was discussed, and the influence on vibration characteristic acted by difference including rise - to - span ratio, shell thickness, section area and constraint condition was studied. vibration shapes - separation - spectra - method and time - history method were adopted to analyze the dynamic response of orthogonal vierendeel dome under common earthquake. by comparing dynamic response in different direction and dimension seismic excitation, the value and distribution of dynamic internal force were obtained

    本文研究了正交空腹網殼結構的動力特性，分析了矢跨比、網殼厚度、腹桿截面和支座約束條件對結構自振特性的影響；採用反應譜法和時間歷程法對正交空腹網殼的地震響應作了詳細的分析，分別研究了結構在不同方向地震激勵下和在不同維數地震激勵下動力響應的數值大小和分佈規律，並比較了兩種方法的結果差異，對抗震設計具有參考價值。
  15. ( 2 ) damage detection based on wavelet transformation using the principle of time - frequency analysis based on orthonormal discrete wavelet transformation, it can detect damage by analyzing how the frequency content of observation signal changes with time

    該方法利用基於離散正交小波變換的信號時頻分析原理，通過分析觀測信號的頻譜隨著時間的變化情況來檢測破損。
  16. Method and apparatus of orthogonal polarization spectral microcirculation imaging

    正交偏振光譜微循環成像方法及裝置
  17. Orthogonal polynomial regression design for interference elimination in atomic absorption spectrometry

    消除原子吸收光譜分析中干擾效應的正交多項式回歸設計
  18. A group of orthogonal frequency carriers are used in ofdm system to improve the using rate of spectrum. if the orthogonal character can be held and ignore the inter - channel interference ( ici ), the symbol error character of ofdm depend on the modulate of source codes. this dissertation propose the theoretic formula of ofdm - qam and ofdm - psk in this precondition

    為了提高頻譜利用率， ofdm系統使用了一組正交的子載波來傳輸信號，若能保證各子載波間的正交性不被破壞、不考慮通道間干擾（ ici ） ，則ofdm系統的誤碼性能由信元調制方案的誤碼性能決定，文中推導了該情況下ofdm - qam和ofdm - psk的理論誤碼率公式。
  19. The design principle is introduced and a solution, called cs code, is obtained by the use of two operations to the conventional orthogonal code set ; an operation of cyclic repetition and an operation of angle rotation

    文章介紹了這種碼的設計準則，並給出了一個具體的實例，稱為梳狀頻譜cs碼。 cs碼利用傳統的正交碼通過2步操作得到： 1循環重復操作2角度旋轉操作。
  20. And the orthogonal frequency division multiplexing ( ofdm ) is given more and more attention in wireless area, because ofdm lessens the severe effects of frequency selective fading and improves the spectrum efficiency, and this technology has been indicated to become a key technology in the fourth moving communication

    其中ieee802 . 11a協議中使用到的ofdm （正交頻分復用）技術，由於其先天具有抗多徑衰落及頻譜使用率高等特性，成為當代無線通信領域研究的熱點，並預示著為第四代移動通信的關鍵技術。
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