variance stability 中文意思是什麼
variance stability
解釋
方差穩定性-
Besides, this paper adopts the random finite element method, uses geometric and physical mechanical parameters that are relevant to lining weight of surrounding rock, coefficient of lateral pressure, height or buried depth of vertical loading, elastic resistance coefficients of surrounding rock, elastic modulus of support structure, unit weight of concrete, thickness of the structure as well as torsional strength and compression strength of concrete and etc., as random variables, applies the monte - carlo method to sampling by computer, preliminarily evaluates the reliability of bearing capacity and stability of molded concrete lining of the xuefeng mountain tunnel, and obtains the related displacement of the lining, mean value and variance of internal force, and computed the reliability index of lining structures
此外，本文採用隨機有限元方法，將圍巖容重、側壓力系數、垂直荷載高度或埋深、圍巖的彈性抗力系數、支護結構的彈性模量、混凝土容重、結構的厚度以及混凝土的抗扭與抗壓強度等與襯砌結構有關的幾何與物理力學參數作為隨機變量，應用蒙特卡洛理論進行計算機隨機取樣，對雪峰山隧道模注混凝土襯砌的承載力與穩定性的可靠度進行了初步評估，得出了襯砌的相關位移與內力的均值和方差，並計算出了相應的襯砌結構可靠指標。 -
The fifth chapter " stock price arfima, garch and figarch model " introduced different kinds of time series models including fractal model, method such as analysis of variance ( anova ) and unit root test to test the stability of time series, method and criteria to estimate the arfima, garch and figarch model
第五章介紹了股票價格的分形時間序列模型，介紹了檢驗時間序列平穩性的方差分析和單位根檢驗方法以及非平穩的處理方法， arfima ， garch和figarch模型的建模方法和股票市場的分形特徵和股票價格的figarcll模型叭穴參數估計方法和估計準則。 -
Since 1960 ", the methods for charactering time - frequency stability in time - domain have been in progress. the methods include allan variance, modified allan variance, time variance, hardamard variance, total variance, time interval error ( tie ) and maximum time interval error ( mtie ), of which tie and mt1e are usually used for telecommunication network
自20世紀60年代以來，時間及頻率穩定度的表徵方法一直在不斷的發展，有阿侖方差、修正阿侖方差、時間方差、哈達瑪方差、總方差以及常用於電信網路的時間間隔誤差（ tie ）和最大時間間隔誤差（ mtie ） 。 -
Some robust stability conditions are derived. ( 4 ) a class of dual - rate input - output predictive model containing time delays is established. a new dual - rate predictive control algorithm for the time - delay system is presented, which makes up the shortcoming of multi - rate weighted minimum - variance control for time - delays system, and has solved the influence of time delays on the multi - rate system
針對輸入更新速率比輸出采樣速率慢的雙速率采樣系統，建立了帶有時滯的輸入輸出預測模型，給出了時滯雙速率采樣預測控制演算法，彌補了已有文獻中時滯多速率采樣加權最小方差控制的不足，解決了時滯對多速率采樣系統帶來的影響 -
Results show that the interdecadal anomalies are more significant in the variance of the system anomaly in the north pacific ( np ), and the interannual and interdecadal anomalies are about equivaleut in the tropical pacific ( tp ) ; the interdecadal change characters of the surface ( shallow ) layer of the ocean and the atmosphere aloft are unanimous in the same season and region, and their transition from a low mode to a high mode both occurred from the end of 1970s to the beginning of 1980s, with an exception for july in the np, which is related to the stability of the stratification of sea temperature within the sub - surface layer ; the interannual scale air - sea anomalies are associated with enso, is most typical for january, then july in the tp, followed by january in the np, and there is no visible relationship for july in the np
在海氣系統異常的方差構成中，北太平洋區域以年代際異常為主，熱帶太平洋區域年際和年代際異常相當；表（淺）層海洋與大氣的年代際變化特徵對同一季節、區域是一致的，且20世紀70年代後期到80年代初均發生由低模態向高模態的轉變；北太平洋區域的7月與此不同，這與該季節近表層海溫層結穩定有關；年際尺度的海、氣異常與enso有關，且以熱帶太平洋區域1月最典型， 7月次之，北太平洋區域1月再次之， 7月無明顯關系。 -
Based on the basic principle of wavelet analysis, multi - resolution analysis of signal in atomic clock is made. the coefficients of wavelet transform for synthesis atomic time, which are weighed and averaged at different wavelet scales, are obtained. then according to reconstruction theorem, multi - resolution synthesis time scale can be reconstructed. since the signal of atomic clock has been analysed by multi - resolution, we can use wavelet variance at different scales to weight and average the coefficients. thus either the difference in stability of different clock or the varying characteristic of the same clock at the different scale are all considered. finaly, this method is checked by the measured data from national timing serve center of shaanxi astronomy observatory. it confirmed that this technique, which is simple and practicable, is a new method of multi - resolution. from this method, the common characteristic of different clocks can be extracted. the stability of multi - resolution synthesis atomic time scale is obviously superior to that of other methods
本文根據小波分析的基本原理，對原子鐘信號進行多解析度分解，將分解后的小波變換系數進行加權平均，得到不同小波尺度綜合原子時的加權平均小波變換系數，然後由小波變換的重構條件，反演綜合時間尺度.由於對原子鐘信號進行了小波分解，利用不同尺度的小波變換系數的小波方差進行加權平均，這樣既考慮不同原子鐘在穩定性方面的差異，又顧及同一臺原子鐘在不同小波尺度的變化特性.最後根據陜西天文臺國家授時中心的實測數據對這種方法進行了檢驗.表明這是一種全新的多解析度綜合方法，這種方法比較簡單而切實可行，它能提取各個原子鐘的共同特性，多解析度綜合時間尺度的平穩性明顯優于其他方法 -
Histogram character is not affected by object figure ' s variance and scale, and it has good stability
直方圖特徵不受目標的外形和比例變化的影響，具有較好的穩定性。 -
And then the ill effects are discussed in the view of computation and statistics, respectively. a new diagnostics technique so - called stability analysis method is proposed. the characteristics analysis, the condition number and the condition indexes & variance decomposition proportions methods are discussed, respectively
提出了一種新的診斷技術? ?穩定性分析法，這是本文研究的一個重點內容；就基於特徵系統的特徵分析法、條件數法和條件指標與方差分解比法等診斷理論進行了較為詳細地研究和探討；對標準化及重新參數化與線性變換對病態性問題的影響進行了初步研究。 -
Abstract : in the nonminimum phase system, it contains the unstable zero, so the controller can " t be designed according to the ideal state. the mode of modified evaluate function addressed in this paper can promise the bounds and stability of the minimum variance control in nonminimum phase
文摘:對于非最小相位系統，因其含有不穩定的零點，所以不可以按理想狀態的情況構成控制器.提出修正目標函數的方法，可確保非最小相位時最小方差控制輸入的有界性和穩定性 -
The results of variance analysis showed that anstar and gannong no. 1 had the characteristics of good stability, high yield potential, strong regeneration and so on, which were favorable in planting on large areas
結果表明，安斯塔、甘農一號苜蓿生產穩定性好，產草量潛力較大，再生性強，綜合性狀好，適宜在當地大面積推廣種植。 -
Based on the total variance analysis on the vehicle steering stability and the neural network control theory, an algorithm of the single neuron adaptive pid control over the vehicle steering stability was proposed
摘要基於汽車操縱穩定性總方差評價方法和神經網路控制理論，建立了汽車轉向單神經元自適應pid控制演算法。 -
The focusing evaluation functions are tested in detail in this dissertation. the experiments indicated that using variance method could attain good stability, insensitivity to noise and good regulation effect
論文重點分析了自動對焦評價函數的性能，最後選擇了性能相對良好的方差評價函數作為清晰度的評價方法。
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