approximate frequency 中文意思是什麼

approximate frequency 解釋
近似頻率
  • approximate : vt 1 使接近。2 接近；走近。3 近似，約計。4 模擬。5 估計。vi 近於。 His income this year approxima...
  • 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。
  1. The approximate computation method is used in float point computation of system ' s control algorithms on fixed - point dsp after comparing several methods in respect of running time and program space involved, which attains quick computation besides high precision and implements output voltaic with low harmonic and high control precision of frequency

    通過從運行時間和佔用空間等方面比較在定點dsp上實現浮點數運算的幾種方法，並選擇了近似計演算法作為系統控制演算法浮點數運算的方法，在保證足夠計算精度的前提下達到計算的快速性，實現低諧波和頻率控制精度高的輸出電壓。
  2. In this paper, we studied the deterministic mechanism of isi with the unstable period orbit ( upo ) ; we tested many isi data from different model with the method of approximate entropy ( apen ) to study the method which is used in testing the degree of complicacy of isi and we built up a system including hardware and software for our lab to view and record action potential, firing frequency and isi in real time. results 1. spontaneous firing patterns were observed from neurons of supraoptic nucleus ( son ) in hypothalamus with the method of patch clamp

    本研究通過對大鼠視上核神經元自發放電的非穩定周期軌道的計算，討論了isi的確定性問題；利用近似熵的方法對多種神經放電的isi資料進行了復雜度的測量，討論了這種方法在isi的復雜度測量第四軍醫大學碩士論文中的應用；另外，還開發出一套記錄原始放電和isi的程序，解決了採集isi的問題。
  3. When the source frequency is low ( lower than 2khz ) and the widths of fractures are approximate, the difference of the snapshots and waveforms between different fracture models is not obvious

    6 、當聲源主頻較低（ 2khz ）時，若裂縫寬度相差不是很大，波場圖和波形圖差別不明顯。
  4. To choose wavelet function based on time - frequency region is put forward, time - frequency region composing of all of these wavelet functions can overlay wholly time - frequency region of non - linear function to approximate

    本文提出了根據逼近函數的時頻空間區域來選擇小波基函數，使這些小波基函數共同構成的時頻空間區域覆蓋完逼近函數的時頻空間區域。
  5. In this paper, dynamic stability of parametrically excited flexible cam - follower system on the weakly nonlinear condition is investigated by using the combination of both the method of multiple scales and the technique of fourier series expansion. the equations of approximate transition curves in the plane of the dimensionless frequency and excitation ( amplitude ) parameter that separate stable from unstable solution are derived

    隨后，本文採用多尺度法並結合fourier級數展開，分析了不同的凸輪從動件運動規律和不同的凸輪的升程、停程以及回程的時間分配規律下，無間隙的周期時變凸輪系統模型的穩定性，獲得了各種規律下的凸輪系統的穩定區間圖。
  6. The approximate computation method is used in float point computation of system ' s control algorithms after comparing several methods in respect of running time and program space involved, which attains quick computation besides high precision and implements excitation voltage with low harmonic and high control precision of frequency

    通過從運行時間和佔用空間等方面比較實現浮點數運算的幾種方法，並選擇了近似計演算法作為系統控制演算法浮點數運算的方法，在保證足夠計算精度的前提下達到計算的快速性，實現低諧波和頻率控制精度高的勵磁電壓。
  7. Firstly, a reduced order model of this flexible structure is obtained by frequency domain identification, then unstructured uncertainties constituted by neglected modes are taken care of in the time of design process by choosing appropriate weighting functions, arid finally a robust feedback controller is designed based on the reduced order model and the approximate knowledge of unmodeled uncertainties

    首先通過頻域辨識得到柔性結構的降階模型，而剩餘高階模態構成的非結構不確定性，通過對權函數的選擇在設計階段就加以考慮，然後基於降階模型和未建模不確定的近似特性設計了魯棒反饋控制器。
  8. 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。
  9. The approximate part get rid of high frequency through the filter, so it can detect the edge which the original image can ' t detect

    經濾波后近似部分去除了高頻分量，因此能夠檢測到原圖像所檢測不到的邊緣。
  10. At this time, the approximate mechanical model of devices has been put forward, which frequency is 70 mhz, then we analyzed the euler ? bernoulli equation, find that the frequency is determined by the resonator ’ s density thickness and length ; the free - free - beam 、 coupled beam 、 support beam 、 transducer have been designed ; the model was simulated and modal analyzed on the coventorware and were consistent with the designed parameter. the silicon surface microfabrication process was developed and emphatically introduced several key surface microfabrication technologies, and was simulated by coventorware

    本文通過分析歐拉-貝努立方程，得出濾波器的共振頻率主要由諧振梁的密度、厚度和長度決定，考慮切變形和轉動慣量的情況下，完成微機械諧振梁、支撐梁、驅動電容的設計;在coventorware軟體上進行模擬，分析結果與理論設計比較好地吻合;對微機械濾波器的加工工藝進行設計，給出器件的完整的工藝流程，重點介紹微機械表面加工工藝，並在coventorware上進行模擬。
  11. With the consideration of the vertical wave effect of soil and soil - pile interaction, an approximate analytical solution to vertical vibration of pile system with variable impedance in visco - elastic layered soil is developed. a simplified and practical mathematical model for interaction between soil layers is proposed, and its applicability is theoretically investigated. based on this model and by using laplace transforms and the transmit property of impedance function, the analytical expression of the impedance function and solutions of the displacement and velocity response function in frequency domain and in time domain at the pile head are derived

    4 、從三維軸對稱土模型出發，對考慮樁土耦合作用、土層層間聯系以及樁周土豎向應力梯度變化條件下的成層粘彈性土中完整樁及變阻抗樁系統縱向振動問題進行了研究，提出了成層土中變阻抗樁系統縱向振動問題的近似解析解法和樁周土層層間相互作用的簡化而實用的數學模型，並利用拉氏變換和阻抗函數的傳遞性，獲得了成層土中任意段變阻抗樁樁頂阻抗函數的解析表達式，以及樁頂速度導納和時域速度響應解析解和半解析解。
  12. The strict solution of the eddy current distribution inside a conductor cylindrical boundary surface for quasi - state - state is obtained by derivation of maxwell ’ s equations ; meanwhile, the approximate solution of the eddy current and electromagnetic field in the condition of the low - frequency or the high - frequency are obtained. furthermore the penetration depth of the skin effect is achieved

    五、討論了似穩條件下導體圓柱面內的渦電流分佈的規律。我們採用圓柱界面條件下獲得的趨膚效應的穿透深度與採用平面條件下獲得的趨膚效應的穿透深度相一致，我們的研究可視為對傳統教材相關論述的有益補充。
  13. But in practical image, edge detection becomes a problem because of the using wavelet to transform the image into approximate express that undertake the filter of the high frequency part by original image

    提出一種利用小波把圖像分解成近似部分和細節部分，近似部分是原圖像對高頻部分進行濾波所得的近似表示。
  14. High frequency approximate solution of wave equation of bit vibration source in seismic while drilling

    隨鉆地震鉆頭震源波動方程的高頻近似解法
  15. Meanwhile, an efficient method, impedance matrix interpolation, is described. the impedance matrix is calculated at relatively large frequency intervals and interpolated to approximate its values at intermediate frequencies

    同時，在計算寬頻帶電性能參數時，引入了一種有效而快速的方法?阻抗矩陣插值技術。
  16. The innovations of this thesis are as the follows : 1 ) it is analyzed that the lower - order jacobi - anger expansion model for an incoherently distributed source has better accuracy performance than some other approximate source models such as space frequency model, two - point source model, and low - rank approximate model. using the parametric decoupling property of the ja - based model, a novel angular parameter estimator is proposed, which is very robust in case of large angular spreading

    本文從這三個方面開展了空間分佈源波達方向估計研究，創新點包括： 1 ）分析了低階jacobi - anger級數展開近似模型的誤差性能；利用該近似模型的參數解耦特性，提出了一種新的波達方向估計器，在大角度擴展條件下，該估計器表現非常穩健。
  17. Author, secondly, starts from the approximate expandness of square root operator, perform mathematical calculations for finite difference operator in frequency - space domain, fourier finite difference operator in mixing domain ( frequency - space and frequency - wavenumber domain ) and general screen operator in mixing domain, compare and discuss their precision of their wavefield, adaptability for lateral velocity variations, computation efficiency and stability. thirdly, author, applies the steady variational reference slowness rytov approximation general screen wavefield extrapolation operator ( vrselrf ) in frequency - wavenumber domain, to the prestack and poststack forward modeling and depth migration

    第二，從平方根運算元的近似展開出發對頻率?空間域的有限差分運算元、混合域（頻率?空間域；頻率?波數域）的fourier有限差分運算元、混合域的廣義屏運算元進行了推導並對其波場描述精度、對橫向變速的適應性、計算效率和穩定性進行了比較與評述。
  18. Such limit is not due to the method itself, but is due to the limits of the speed and memory of computers. at present, we mainly use the high - frequency approximate method to analyze the electrical - large size target whose shape is relatively regular

    矩量法不適于分析電大尺寸的物體，這種限制不是由於方法本身，而是碩士學位論文凡1入ster 』 5th卜515由於計算機速度與存儲能力的限制。目前主要採用高頻近似方法來研究電尺寸較大而形狀相對規則的目標。
  19. But using the high - frequency approximate method to deal with the coupling of parts of electrical - large size target is troublesome as well as not accurate. combining the moment method and the high - frequency approximate method is a development trend and study way in the future

    但高頻近似方法對于電尺寸大而形狀很復雜的散射體各部件之間的相對禍合處理起來有些麻煩且不很精確。將高頻近似方法和數值方法（如矩量法）相結合，是以後的發展趨勢和研究方向。
  20. Feedback frequency domain equalization for approximate parallel receiver

    數字并行接收機的反饋頻域均衡方法
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