自相关函数

The stationary conditions and autocorrelation function are derived.

讨论了混合自回归滑动平均模型的平稳性条件和自相关函数。

In the test of weak-form efficient hypothesis, this thesis used auto regression, auto correlation function and unit root three models, and got the basically same results. In the test of semistrong-form efficient hypothesis, this thesis used market model, index return model and constant mean return model three ways to estimate the normal return when making use of event study, and the results were also basically same.

其中，为求全面和比较，在对弱势有效市场的假说的检验部分，本文运用了自回归检验、自相关函数检验和单位根检验三种计量模型，检验结果基本一致；在对半强势有效市场假说的检验部分，本文运用了事件研究法，并在估计正常收益率时使用了市场模型、指数收益模型以及均值模型三种方法，估计结果也相对一致。

The model\'s performance is acceptable in the prediction of error, auto-covariance function and Hurst effect.

在预测误差、自相关函数和自相似性等方面，该模型取得了较好的拟合效果。

The intensity distribution is closely related to ACF of incident wavefront.

干涉场的强度分布是与入射波面的自相关函数密切相关的。

The analysis indicates that the mean intensity distribution on the receiver plane is closely related to the ratio of the lateral correlation length to the surface root mean square height.

研究了粗糙目标对相干光场的散射，导出了在接收平面上光场的自相关函数、光强度的分布和光强度的二阶矩，在分析粗糙目标对激光脉冲后向散射的基础上，提出了后向散射光强度与目标均方根高度和相关长度的关系，阐明了粗糙目标的后向散射机理。

A set of equally long finite sequences is said to be complementary sequences if the sum of autocorrelation functions of the sequences in that set is zero except for a zeroshift term.

补码是一种由多个等长的序列组成的、具有良好的自相关性特性的序列集。补码集中每个序列的自相关函数的和在除了零点外的其他任何点上均为零。

In the amino-acid composition with auto-correlation function-added approach, the overall resubstitution accuracy is 95.34%, the overall accuracy of Jackknife test is 81.92% and the overall accuracy of the cross-validation test is 86.61% when Miyazawa and Jernigan's index is used.

结果表明：对非同源蛋白质数据库，在氨基酸组成和自相关函数相结合的方法中，采用Miyazawa和Jernigan的疏水值时，训练库的自检验的总精度为95.34%，其Jackknife 检验的总精度为81.92%，检验库的他检验的总精度为86.61%。

Adaptivefilter can adjust its coefficients automatically to minimize themean-square error between its output and that of an unknown input,unnecessary to know the autocorrelation functions of signal andnoise in advance, hence it can realize linearly optimumfiltering.

自适应滤波器可以不必事先给定信号及噪声的自相关函数，它可以利用前一时刻已获得的滤波器参数自动地调节现时刻的滤波器参数使得滤波器输出和未知的输入之间的均方误差最小化，从而它可以实现最优滤波。

Adaptive filter can adjust its coefficients automatically to minimize the mean-square error between its output and that of an unknown input, unnecessary to know the autocorrelation functions of signal and noise in advance, hence it can realize linearly optimum filtering.

自适应滤波器可以不必事先给定信号及噪声的自相关函数，它可以利用前一时刻已获得的滤波器参数自动地调节现时刻的滤波器参数使得滤波器输出和未知的输入之间的均方误差最小化，从而它可以实现最优滤波。

The pair distribution function, the mean square displacement of melt and the normalization velocity self correlation function have been calculated.

计算了纯金属熔体Al在不同温度下的双体分布函数，平均平方位移及速度自相关函数。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。