nonstationary method 中文意思是什麼

nonstationary method 解釋
非平穩方法
  • nonstationary : 不固定的,變的
  • 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. In this paper, a crank - nicolson mixed element method, a nonlinear galerkin mixed element method for the non stationary conduction - convection problems time second order accuracy fully discrete formats and a two - level mixed element method with backtracing for the stationary conduction - convection problems are presented and analyed, respectively, an error analysis are provided for the crank - nicolson method of time discretization applied to spatially discrete galerkin mixed element approximations of the nonstationary conduction - convection problems

    本文分別給出了非定常的熱傳導-對流問題的crank - nicolson混合元法時間二階精度全離散格式，非線性galerkin混合元法時間二階精度全離散格式以及定常的熱傳導-對流問題回溯二重水平法。討論了時間上的crank - nicolson離散方法應用於非定常的熱傳導-對流問題的空間離散的galerkin混合元近似。
  2. Rectangular crouzeix - raviart anisotropic finite element method for nonstationary stokes problem with moving grids

    型各向異性非協調元變網格方法
  3. Then, the multidimensional pseudo excitation method is developed for nonstationary random vibration analysis of lattice shells under multi - support and multi - dimensional earthquake inputs

    在此基礎上，發展了多維隨機虛擬激勵演算法的理論，推導出了考慮多點、非平穩輸入時多維虛擬激勵法的計算公式。
  4. A new method for doa estimation in certain nonstationary environments is presented in chapter 4. the maximum likelihood ( ml ) estimations of doa ' s of multiple rapidly moving sources is derived and the theoretical variance of angle estimation and the corresponding cramer - rao lower bound ( crlb ) are also given. its simulations show that this parametric technique is able to resolve closely spaced sources

    提出了一種非平穩環境下的最大似然doa估計方法，該演算法適合於時變doa的情形，並分析了其參數估計性能，給出了角度估計的漸進方差的解析表達式，表明了常規的最大似然doa估計是本文的一特殊情形。
  5. As far as the nonstationarity during the long period operation of machinery was concerned, the application of adaptive linear element ( adaline ) neural network to prediction of nonstationary time series was studied. the relationship between adaline and auto regressive ( ar ) model was analyzed, and the method to determine the number of input neurons in adaline prediction model according to bic criteria was presented. the effect of the adaptive learning rate on prediction was also analyzed

    針對生產實踐中設備運行的非平穩性，基於動態預測思想，研究了非平穩時間序列的自適應線性單元（ adaline ）神經網路預測，討論了adaline和自回歸（ ar ）模型之間的關系，提出根據ar模型定階方法確定adaline預測模型的輸入神經元數目，分析了自適應學習率對預測性能的影響，為機械設備狀態預測提供了一種方法。
  6. A numerical method for simulating natural wind based on nonstationary random process

    按非平穩隨機過程模擬自然風速的一種數值方法
  7. The non - conforming mixed finite element method for the nonstationary conduction - convection problems

    對流問題的非協調混合有限元法
  8. For nonstationary stokes problem, materials ' anisotropic character should be considered in a boundary layer or near the angular of the domain fj. at this time, the subdivision to region q is not of regularity or quasi - uniform and should be anisotropic grid, which can describle the facts exactly. crouzeix - raviart element and rotary q4 element are failed in anisotropic grid and many others either ca n ' t satisfy the anisotropic property or ca n ' t be used to the moving grid finite element method. it ' s proved that five nodals element presented by professor houde han can overcome this shortcoming

    常用crouzeix - raviart元和旋轉q _ 4元由於不能滿足各向異性插值特徵而失去效用。而其它許多單元或是不滿足各向異性插值特徵或是尚不能直接應用於stokes方程變網格有限元。經本文證明由韓厚德教授提出的五節點單元很好地解決了這一矛盾，這些結論以前是沒有人作過的。
  9. In chapter 3, we discuss the problem of doa estimation in the presence of spatially nonstationary noise fields. an estimate of the colored noise covariance matrix is firstly given. the received data for parameter estimation is then prewhitened using the estimated noise covariance, hence, overcoming the highly biased estimates. finally, adaptive beamforming with the modified weight is also performed. computer simulations show that the proposed method can completely remedy beam distortion. 3

    在第三章討論了一種在環境噪聲為白噪聲而陣元噪聲為空間非平穩情況下的doa估計問題，給出了一種有效的估計陣元噪聲功率的方法，進而利用估計的噪聲協方差矩陣進行預處理而實現色噪聲環境下的doa估計，理論分析和模擬結果均表明了本章提出的方法的有效性。
  10. Its contents include results on the finite element method for the dynamics equations, the lumped mass finite element methods and error estimations for solving the parabolic problem, fourth order nonstationary elliptic equation, the nonstationary stokes problem and bingham fluid problem, the finite element methods and error estimations for solving linear and nonlinear the hyperbolic equations

    內容包括關于求解工程力學方程有限元方法的最新結果。解拋物問題、非穩態四階橢圓方程、 stokes問題以及管道bingham流的質量集中有限元方法及其誤差估計，解線性與非線性雙曲型方程的有限元方法及其誤差估計。
  11. The nonstationary vibration sources that are mutually independent can be effectively identified by using the nonstationary blind source separation method from the multi - channel fault vibration signals

    對于多通道的設備故障振動信號，應用非平穩信號的盲源分離演算法，可以有效地提取各自獨立的非平穩振動源，從而可以準確地進行機械故障診斷。
  12. This paper proposed a novel method for detection of biomedical signals based on the parametric model and higher order spectra technique. the new method can separate continuous signals automatically and this method is also useful in nonstationary time - varying signals. we proposed a sequential procedure that does not use the information provided by the future and the computational complexity is less than global segmentation of the process

    本論文詳細論述了肌電信號產生的機理，以及介紹了肌電信號在康復醫學中的應用，並詳細介紹了目前存在的肌電分析的方法，在此基礎上，本文提出了一種基於ar參數模型的生物醫學信號的檢測方法，能夠按照它所對應的不同的上肢動作，對於一段連續肌電信號進行檢測和信號自動分段，這種方法特別適用於非平穩的肌電信號，而且運算量要大大小於基於全局的信號的分段方法。
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