random walk model 中文意思是什麼

random walk model 解釋
無規行走模型
  • random : n 〈罕用語〉胡亂行為，偶然的[隨便的]行動[過程]。adj 1 任意的，胡亂的，隨便的；（話等）信口亂說的...
  • walk : vi 1 走，步行；【籃球】帶球走，走步；（馬）用常步走。2 走著去；散步。3 （鬼等）出來。4 〈比喻〉處...
  • model : n 1 模型，雛型；原型；設計圖；模範；（畫家、雕刻家的）模特兒；樣板。2 典型，模範。3 （女服裝店僱...
  1. Random - walk model for photon migration in turbid biological media

    生物組織中光傳輸的隨機行走模型
  2. Spatial distribution and time scales of atmospheric diffusion over beijing area are revealed by means of a random walk simulation model and practical meteorological data with a specified emission source from the city. results show a southward transport pattern for wintertime while a northwest transport of pollutants in summer. the area is the least evidently influenced by the emission source in spring, while the largest in autumn. the time spent for instantly emitted material removing from the model domain varies from winter - spring to summer - autumn. the former was shorter one of less than 20 hours ; the latter was longer one of approximately 30 hours. distribution of occurrence probability for different removal times was not symmetry. reducing slowly at the end of longer removal time, probability exists for pollutants remaining in this area a long time

    結果表明，冬季示蹤物偏南夏季偏西北的輸送明顯春季擴散影響范圍最小秋季最大。示蹤物從200km200km模式區域輸出的平均時間去除時間明顯分為冬春季和夏秋季兩組，前者較小，平均在20h以下，後者較大，平均約30h 。不同去除時間出現的頻率分佈是非對稱的，在長去除時間一側，出現頻率下降緩慢，顯示污染物有在該區域內長時間滯留的可能。
  3. We analyse the dispersion of stock returns and have the tests of serial correlation. the results show that the trading mechanism has a significant effect on a number of characteristics of stock returns. first, the distribution of open - to - open returns has greater variance than that of close - to - close returns. second. the serial correlation pattern is quite different in the two return series. the open - to - open returns have negative autocorrelation coefficient, but the close - to - close returns is positive. further, employing an arma ( 1, 1 ) model we find that in the opening. returns exhibit higher residual noise and stronger dependence on past returns, reflecting stronger deviations from the random - walk form of the market efficiency hypothesis

    主要表現為：一，開盤收益序列比收盤收益序列具有更大的方差。二，兩種收益序列的序列相關形式不同，開盤收益序列表現為負相關，而收盤收益序列表現為正相關。而且我們通過arma （ 1 ， 1 ）模型的進一步檢驗，發現開盤收益序列比收盤收益序列具有更大的殘差，更依賴于過去的收益序列，也更偏離於市場有效的隨機遊走形式的假設。
  4. Specially, based on risk - metric and factor variables, the author discusses multi - factor asset pricing model. in theoretical analysis, the author attempts to release the assumption of index ' s random walk, proves a portfolio selection model suitable for the linear index level moreover, based on assets un - exchangeable, the author brings forward asset pricing models for b - shares, h - shares and non - circulated - shares. the author also brings forward multi - factor asset pricing model based on risk - metric indices, such as coefficient of beta, standard variance, standard semi - variance, average absolute deviation, value at risk, and factor variables, such as circulated market equity, exchange ratio, short - term historical return

    在理論分析時，作者嘗試放鬆指數水平滿足隨機遊走過程的假設，推導出指數水平呈線性趨勢的資產組合選擇模型；此外，作者基於資產不可交易這一假設，提出了b股、 h股和非流通股等情形的資產定價模型，並基於系數、標準差、標準半方差、平均絕對離差和風險價值等風險度量指標以及流通市值、換手率、短期歷史收益率等因素變量提出了四因素資產定價模型。
  5. This part mainly discusses the statistical distribution of the price and the returns rate, including random process and the returns rate model, gaussian process, measuring returns rate with discrete random process, white noise process, auto regression process, moving average process, auto regression moving average process, random walk, continuous random process, leptokurtic distribution, conditional mixed distribution, garch model and fractal distribution

    在這一部分中，我們主要討論價格和收益率的統計分佈：隨機過程和收益率模型、高斯過程、收益率計量中的離散隨機過程、白噪聲過程、自回歸過程、移動平均過程、自回歸移動平均過程、隨機行走、連續隨機過程、尖峰分佈、條件混合分佈、 garch模型以及分形分佈。
  6. But the most common noise is angle random walk, bias instability, rate random walk, rate ramp and quantization noise. in this paper, the random error model including the most common five noise as above

    對常見的五種噪聲因素包括角度隨機遊走、零偏穩定性、速率隨機遊走、速率斜坡和量化噪聲建立了陀螺隨機誤差模型。
  7. These measures include random walk model, industry model, mean - reverting model, jones and modified - jones models, k - s model, margin model and so on

    應計利潤模型主要包括隨機遊走預期模型、行業模型、平均數回復模型、瓊斯及其擴展模型、 k - s模型、邊際模型和營運資金模型等。
  8. If the market is nonlinear dynamics, then we would have a mistake result by using standard statistic, especially we using random walk model

    如果市場是非線性動力系統，那麼，使用標準統計分析就會得出錯誤結果，特別是使用隨機游動模型時。
  9. The results show that the ionosphere - weighted model or the tropospheric estimation, integrated with the partly - weigthed least squares, can improve, the success rate and the reliability of ambiguity resolution ; however, if the ionospheric delay or the tropospheric delay, which is modeled on random walk process or first - order gauss - markov process, is estimated with the kalman filter, it will reduce the success rate and the reliability of ambiguity resolution

    將電離層延遲作為零均值的隨機遊走過程（電離層加權模型） ，將對流層延遲作為靜態參數，採用非遞推形式的加權最小二乘法來估計，可以提高模糊度解算的成功率和可靠性。
  10. Random walk model

    無規行走模型
  11. There are random walk model and the method which are used to study an example

    給出了相應的隨機游動模型及其證明，並通過實例計算加以驗證。
  12. Secondly, we performed the time series analysis for the random walk model on the fitness landscape to discover more information about the fitness landscape, and demonstrated the modeling process based on the nk - landscapes

    對適應值曲面上的隨機遊走模型進行了時間序列分析，以獲得關于適應值曲面的更多的信息，並基於nk -適應值曲面進行了實證研究。
  13. Employing the random walk model, the white - noise models and nonlinear models to test the weak efficient market of china " s capital market, this essay find that china " s capital market hasn " t reached the lowest efficient market

    本研究採用隨機遊走模型（ therandomwalkmodel ） 、白噪聲過程模型（ thewhite - noisemodels ）和非線性模型（ nonlinearmodels ）對我國資本市場進行弱型有效市場檢驗，結果表明，迄今為止我國資本市場還沒有達到最低層次的有效市場狀態。
  14. The results show that saastamoinen / niell model can remove the most of the tropospheric delay and then significantly improve the kinematic positioning solutions ; the ionosphere which is modeled on random walk process can also improve the kinematic positioning solutions ; however, the troposphere which is modeled on random walk process will bias the kinematic positioning solutions

    結果表明，對流層模型改正可以大大改善定位結果的精度，不過仍存在未模型化的對流層延遲誤差。將電離層延遲作為隨機過程來處理，可以提高定位精度；而將對流層延遲作為隨機過程來處理，則會影響定位精度。
  15. The trajectory of the particles was computed by introducing the discrete random walk tracking model, through which the grading efficiency and general efficiency of the vortex quick separator could be simulated

    採用離散軌道模型對該旋流快分器內顆粒的運動情況進行了計算，並由此估算了旋流快分器的分級效率和總分離效率。
  16. Solomon ( 1975 ) introduced the concept of random walk in a random environment, proved the existence of the model on the set of integers, and obtained its limit theorems

    Solomon （ 1975 ）引進了隨機環境中隨機游動的概念，在整數集上證明了該模型的存在性，並得到了它的極限定理。
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