frequency domain method 中文意思是什麼

frequency domain method 解釋
頻域法
  • frequency : n. 1. 屢次，頻仍，頻繁。2. （脈搏等的）次數，出現率；頻度；【物理學】頻率，周率。
  • domain : n 1 領土，版圖；領地。2 管區，勢力圈；（特定動物等的）生長圈；（學問、活動等的）領域，范圍；【物...
  • method : n 1 方法，方式；順序。2 （思想、言談上的）條理，規律，秩序。3 【生物學】分類法。4 〈M 〉【戲劇】...
  1. The frequency domain algorithms are adopted for demodulating sensors connected in parallel. the capability of this multiplexing method is analyzed

    然後，在光強函數的傅立葉變換域，討論了傳感器的復用問題。
  2. The classical frequency - domain theory forms a basis of bridge vibration analysis, however such method has some limitations. some literatures show that the time - domain analysis method has advantages for vibration analysis. because of the research on time - domain vibration analysis developed only in recent years and the theory is n ' t perfect enough, it needs to be made further investigation

    經典的簡化靜力法存在一定的局限性；反應譜法為中、小跨橋梁的抗震設計提供了廣泛的應用，但對解決大跨度橋梁的線性與非線性問題存在明顯不足；時程分析法由於該領域的研究起步較晚，目前的理論和方法還不甚成熟，有待于進一步深入研究。
  3. On the other side, we use the method of optical formation process to introduce two fundamental filtering function in frequency domain of coherence system of awg two optical processors are designed, that is optical signal add / minus and phase filter

    另一方面，運用光學信息處理方法，我們探討了awg型相干系統頻譜區兩類基本的濾波函數的引入，設計了兩種光信號處理器：光信號加減器以及位相，濾波器。
  4. Wavelet transform, which has a multi - resolution analytic character, is a time - scale ( time - frequency ) analytic method of information. moreover, as both of its time - window and frequency - window can be changed it processes the ability of expressing local characters of information in time - frequency domain

    小波變換是一種信號的時間尺度（時間頻率）分析方法，它具有多解析度分析的特點，而且在時頻兩域都具有表徵信號局部特徵的能力，是一種窗口大小固定不變但其形狀可改變，時間窗和頻率窗都可以改變的時頻局部化分析方法。
  5. The matrix can be applied for the research of the vibrating frequency domain characteristics of the artillery system which is caused by the excitation of the plainness road surface. this method can also be applied to more complicated input spectrum of the wheel - system vehicles, and it has general signification

    該矩陣可用於研究火炮牽引列車系統受路面不平度激勵所產生振動的頻域特性，該方法可以推廣到更復雜的輪系車輛輸入譜的推導，具有一般意義。
  6. To increase the bearing accuracy of amplitude - comparison, the multi - channel system was chosen, the angle of reaching of moving antenna pattern serial was estimated from the frequency domain using the phase - delay estimating method, and at the same time, the selection of antenna, quantization of signal and touch switches were optimized in concrete engineering practice, and so the requirement of the index was satisfied

    為提高比幅測向的精度，選用多通道體制，採取相位延時估計法從頻域來估算移動天線方向圖系列的達到角，同時在具體的工程實現上對天線選取、信號的量化、去摸開關等進行優化，從而滿足指標要求。
  7. Following, using the experimental methods, the dynamic response of the stiffened conical shells under cosinoidal impulsive loading is studied. the changes of dynamic response of points along circumferential line of the conical shells are analyzed, and the characteristics of dynamic response of points are studied by both the time - domain analytic method and the frequency - domain analytic method

    採用實驗方法研究了加筋圓錐殼在側向餘弦載荷作用下的動力響應，分析了沿環向各點的響應變化，並從時域和頻域分析了它們各點的響應特性。
  8. Due to the short distance among the planes which fly in a group, the conventional low resolution radar can not distinguish them in both distance and azimuth ? if we use the technology of isar to resolve the difference among doppler frequency of the targets and obtain a fine resolution cross - cross image, we may separate them, but a long time of coherent processing is needed <, for the formation targets, it can be approximately divided to rigid body and nonrigid body, so for the formation targets, that can be regarded as rigid which has a relative position and an identical movement, can be approximately considered as a large target, and be compensated by translational phase with the rule of minimum entropy, but for the most those cannot accord with the approximation of rigid, being the doppler - frequency of the aim is linear changed, by the relax method with short data, increases the resolving performance of multiple target to the aim in the frequency domain, since cross - range resolution is based on the accumulative time, so it is greatly improve the resolution to formation targets by the instant cross - range image which produced by radon - wigner transformation

    低分辨isan成像及干涉技術應用研究一因此直接無法分辨編隊目標的架數，我們借鑒isar的技術，通過較長時間的相干積累，在多普勒頻域上對目標進行分辨。而對于編隊目標，可分為近似剛性的多目標和非剛性的多目標，所以對于可以近似為剛體的編隊目標相對位置固定，運動方式一致，可以近似看作一個大目標，採用最小墑準則對平動相位的進行補償，但是大多數並不滿足剛體近似的編隊目標，由於目標在相干積累時間的多普勒頻率近似呈線性變化，通過對較短數據利用relax的時頻分析方法，提高了頻率域上目標分辨的性能。由於橫向解析度取塊于橫向積累時間，所以利用radnwigner變換得到瞬時的一維橫向距離像大大提高了對編隊目標的分辨，對模擬和實測數據的大量分析結果表明此方法的有效性和可行。
  9. Frequency domain model reduction method

    頻域模型降價法
  10. A comparative study between time - domain method and frequency - domain method for identification of bridge flutter derivatives

    橋梁顫振導數識別的時域法與頻域法對比研究
  11. Furthermore, the isoline maps of mean wind pressure coefficients and rms wind pressure coefficients of the structure under various wind directions are plotted. in the matter of theoretical analysis, modeling with finite element method, using the local mean wind pressure coefficients and time history of fluctuating pressures determined in wind tunnel, the wind - induced dynamic responses for long - span grid roof structures are calculated in frequency domain and time domain separately

    在理論分析方面，建立合理的有限元模型，利用剛性模型風洞試驗獲得的各種不同情況下屋面各節點的平均風壓系數和脈動風壓時程，在頻域內和時域內進行了大跨網架屋蓋結構的風振響應分析。
  12. This thesis mainly discusses the techniques of channel estimation in frequency domain, which utilizes the optimized leading sequence. an enhanced method for searching optimized leading sequences is introduced based on existing documents. this method can decrease the errors and make the searching and caculating easier

    本論文主要討論用最佳前導序列在頻域中進行通道估計的問題，在前人的基礎上提出一種改進型的搜索最佳前導序列的方法，可使得估計誤差減小且便於搜索計算，模擬驗證了演算法的有效性。
  13. The thesis firstly analyzes the signal form of frequency modulated interrupted continuous waveform ( fmicw ) in theory, studies the principles of detecting range and velocity for fmcw, and further discusses the essential processing methods of the fmicw signal form, including the range transform processing method based on the strict corresponding relation between time and frequency domain, the velocity doppler transform, the digital beam forming

    本文首先從理論上分析了在高頻地波超視距雷達所用的線性調頻斷續波信號的形式，研究了fmcw雷達測距測速原理，並深入地探討了fmicw信號的基本處理方法以及具體的演算法，主要包括距離變換中採用的時間波門相關處理方法，速度多普勒變換，數字波束形成。
  14. A time - frequency domain method for carrier frequency estimation 2

    提出了用時頻理論來估計載波頻率和位同步信息。
  15. Frequency domain method, however, takes an advantage in the aspect

    而以傳遞函數矩陣為基礎的頻域法在這方面具有很大的優勢。
  16. The other is the modern frequency domain method performed by rosenbrock. the design objective is the diagonal dominance, not the diagonalization, so it may avoid the limitation of the complete decoupling. it is an approximate decoupling method

    其二是以rosenbrock為代表的現代頻域法，其設計目標是被控對象的對角優勢化而非對角化，從而可以在很大程度上避免全解耦方法的缺陷，這是一種近似解耦方法。
  17. ( 2 ) for linear systems with time - varying delays both in state and control, and subject to norm - bounded parameter uncertainties, the problems of robust stabilization and robust h control are studied and delay independent results are derived by constructing proper lyapunov function to deal with the time - delay, also by using riccati equations method and inequalities transformations to deal with the uncertainties. according to the transform function of the system, frequency domain method and time domain method are combined together to analyze the robust h control problem of the uncertain time - delay system

    （ 2 ）研究了一類狀態和控制同時具有時變時滯以及參數時變有界不確定性系統的時滯無關的魯棒鎮定及h控制問題，採用把時滯因素和不確定因素分開處理的思路，通過構造適當形式的lyapunov函數來處理時滯，採用不等式變換及riccati方程方法來處理不確定性，採用頻域與時域相結合的方法根據系統的傳遞函數分析時滯不確定系統的魯棒h控制問題。
  18. A time domain method of the simulating sar raw target signals is presented firstly, which can simulate accurately raw dates but burdens upper computational complexity. therefore, a frequency domain method with lower computational complexity is also proposed

    因此，又給出了一種頻域回波信號生成演算法，該方法能夠在滿足一定條件下利用二維fft演算法快速產生分佈目標的回波信號，具有較高的計算效率。
  19. The used value of doppler centroid influence the imaging result very much, so it must be estimated precisely. the estimating methods contain time domain method and frequency domain method. time - frequency analysis method can be used to improve estimating precision

    多普勒中心頻率的取值對成像效果有很大影響，必須精確估計，估計方法有時域方法及頻域方法，還可利用時頻分析方法提高估計精度是。
  20. These roof structures are generally in high turbulent regions, then wind loads become important to these structures. commonly, wind - induced response is analysed in frequency domain method. but the contributions of those high order models are omitted owe to the complexity of analyse themselves

    分析結構風致響應時一般採用頻域法，而頻域法中採用常規的模態分析方法? ?振型截斷法時，往往因為對高階振型本身分析的復雜性而忽略了高階振型對結構響應的影響，使得計算的結果缺乏合理性。
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