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Then, both the stationary and non-stationary random response of hysteretic system with cubic rigidity and sticky damp were deduced and calculated. In the research of colored white noise, the filter for shaping the power spectral density was designed and the random state response of enlarged vector was gotten. With this, the experimental power spectral curve was changed into colored white noise and the random response could be easily calculated.

对平稳白噪声,给出了平稳响应的求解方法并对平稳状态下的模型参数对响应的影响进行了比较与分析;在有色白噪声的研究里,通过有色白噪声的扩阶方法和构造成型滤波器来计算有色白噪声的响应,从而解决一类工程实际振动问题的仿真模拟。

Brain is a very complex non-linear system, and electroencephalograph and electrocorticogram are also non-stationary and nonlinear in nature, signal processing methods based on linear and stationary assumptions, although has obtained important result, can not grasp the entire picture of neuroscience.

人脑是一个高度复杂的非线性非平稳系统,所以脑电图和皮层脑电图也是非线性非平稳信号,基于线性和平稳假设的分析方法尽管取得了一些重要的研究成果,但是无法对神经系统进行更加深入的解释。

Furthermore, based on the ergodic theory of Markov process we analyze the stationary distribution of network residual series, and prove the efficient conditions under which the unique asymptotic stationary distribution exists.

同时,根据马氏过程的遍历理论,对网络输出残差的平稳条件进行了研究,证明了网络输出平稳残差的充分条件,给出了残差序列存在唯一的渐近平稳分布的条件。

A model for finding the cryptic period of hydrological time series is proposed. The functions of the model include to apply logarithm transformation for making the sequence more stationary, to construct a corresponding auto-regression model for reducing the herteroskedasticity of residual, to determine the component of the prime period by periodogram analysis.

本文在讨论水文时序平稳性和异方差性的基础上,提出了检测水文时序隐含周期的模型,即对水文时序设计对数变换序列,提高序列的平稳性;建立相应的自回归模型降低残差的异方差性;通过对所得平稳序列进行周期图分析确定可能的主周期分量。

Model for finding the cryptic period of hydrological time series is proposed. The functions of the model include to apply logarithm transformation for making the sequence more stationary, to construct a corresponding auto-regression model for reducing the herteroskedasticity of residual, to determine the component of the prime period by periodogram analysis.

bstract 本文在讨论水文时序平稳性和异方差性的基础上,提出了检测水文时序隐含周期的模型,即对水文时序设计对数变换序列,提高序列的平稳性;建立相应的自回归模型降低残差的异方差性;通过对所得平稳序列进行周期图分析确定可能的主周期分量。

The correlation coefficient stationary process in which the mean and variance vary with time is familiar in engineering,and the traditional correlation function stationary process is just a special case of that.

相关系数平稳过程是从非平稳过程中分离出的一类工程上常见且便于研究的随机过程,其均值和方差都可随时间变化,传统的平稳随机过程是它的一个特例。

Previous work on this problem has typically assumed that the channel conditions between the base station and the users are governed by a stationary stochastic process.

但在实际情况中,这样的平稳假设并非总是合理的。研究表明基于平稳假设的调度算法,如流行的M-LWDF和EXP-rule算法,在非平稳信道上的性能下降明显。

In this dissertation , the methods of prediction and parameters\' estimation based on stationary multivariate autoregressive models AR(p are studied systematically. Some properties of these methods are formulized.In the first part, it introduce some basal conceptions about multidimensional stationary time series, contained the estimation and property of mean vector and auto-covariance function. Then the stable condition of multidimensional AR models are discussed.

本文主要研究了多维平稳序列自回归模型AR的参数估计及其相关的统计性质,具体内容如下:第一部分,介绍了多维平稳时间序列及其均值向量和协方差阵函数的概念,并引入了多维AR模型及其数字特征,在此基础上给出了模型的平稳性条件。

Using augmented Dickey-Fuller test, the result shows that BDI logarithm series is nonstationary but the first difference is stationary, i. e. it is integrated of order one. High-level ARCH effect was certification in the BDI logarithm series by ARCH LM test, and GARCH (1, 1) model was used to eliminate the conditional heteroscedasticity. Through variance ratio test, the result shows, that the random walk hypothesis of BDI logarithm series can be rejected and international dry bulk shipping market is inefficient.

运用ADF检验方法对BDI的对数序列进行平稳性和单整检验,结果证明BDI对数序列是一个非平稳过程,经一阶差分后是平稳过程,即BDI对数序列是一阶单整过程;通过ARCH LM检验认为BDI对数序列存在高阶ARCH效应,并用GARCH(1,1)模型消除了残差序列的条件异方差性;通过方差比检验法对国际干散货航运市场的收益率序列进行了检验,结果显示BDI的对数序列的随机游走假设被拒绝,国际干散货航运市场不是一个有效的市场。

But with last year"front Gao Hou4 Di" dissimilarity BE, 2005 investment growth more steady, do not appear "crustily six" that someone anticipate, September ratio growth most slow of February only 3.1 percentage point in Gao Chu, increase soon and more quick and steady present towards promote national economy steadily circulate develop importance function, express nation the policy effect of"have retention to press, differentiation treat" just at.

但与上年&前高后低&不同是,2005年投资增长比较平稳,并未出现有人预计的&硬着陆&,9月比增长最慢的2月份仅高出3.1个百分点,增速较快而且平稳对促进国民经济平稳运行发挥了重要作用,表明国家&有保有压,区别对待&的政策效应正在显现。

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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。