查询词典 autocorrelation

It is shown that many of the existing integral transforms (including their logically equivalents) such as chirplet transform, dispersion transform, wavelet transform, chirp-Fourier transform, short-time Fourier transform, Gabor transform, Fourier transform, cosine transform, sine transform, Hartley transform, Laplace transform, z transform, Mellin transform, Hilbert transform, autocorrelation function, cross-correlation function, and the energy and mean of a signal, can each be considered as a special case of the FMmlet transform with specific parameters. In fact, an inventory of subspaces of FMmlet transform runs into countless numbers. The subspaces mentioned above are merely a few among a zoo of subspaces. They are essentially obtained by cutting the transform space of FMmlet transform at different positions, and can be likened to the computed tomography in medical diagnosis. Through these subspaces we actually see different slices or profiles of the FMmlet transform.

将现有诸多变换置于统一的 FMmlet 变换中加以审视，发现 chirplet 变换、频散变换、小波变换、 chirp-Fourier 变换、短时 Fourier 变换、 Gabor 变换、 Fourier 变换、余弦变换、正弦变换、 Hartley 变换、 Laplace 变换、变换、 Mellin 变换、 Hilbert 变换、自相关函数、互相关函数、能量和均值等，均为 FMmlet 变换在其参数取特定值时的特例；上述诸变换之间的差别，主要在于变换空间的维数有别，以及在不同空间维上取值的不同；这些变换有如医学诊断中的 CT，均由压缩 FMmlet 变换域空间所致，可以说我们通过这些变换看到的，是 FMmlet 变换的不同剖面。

After studying abroad and home studies on housing price and price dynamics, this paper constructed an analytical frame to examine house price dynamics through autocorrelation and spatial correlation and explained the causing mechanism about it.

在梳理了国内外学者关于住房价格、住房价格波动相关研究的基础上，本文建立了通过自相关和空间相关两个维度考察城市住房价格波动的分析框架，解释住房价格波动的产生机制。

Numerical simulation ; autocorrelation function ; root mean square ; Gauss distribution

数值模拟；自相关函数；均方根； Gauss分布

Lin and Wei considered the tests for homogeneity of within-individual variances and between-individual autocorrelation coefficients of nonlinear models with AR(1) errors based on longitudinal data.

对具有AR(1)误差的非线性纵向数据模型，林金官和韦博成讨论了其方差和相关系数的齐性检验。

This kind of sequences has very high frequency, it also has better characteristic of autocorrelation and intercorrelation. It present a new kind of selecting scheme for spread-spectrum communication.

在本文的最后，我们将讨论一种基于蔡氏电路的混沌扩频序列，这种混沌扩频序列可以做到很高序列脉冲频率，同时它同样具有良好的自相关特性和互相关特性，它为扩频通信提供了一种新的序列选择方案。

This paper analyzes irrational number series of square root of 2 and e in six aspects involving autocorrelation function,Power Spectral Density,phase space construction,correlation dimension,Principal Component Analysis and maximal Lyapunov exponent.

将已提出的π序列定义和分析方法推广到无理数领域，引出了无理数序列，并以常用的无理数根号2、e为例，对无理数序列的自相关、功率谱、相空间、关联维数、最大Lyapunov指数和主分量等6个方面进行深入分析。

The character values of the wood disfigurement styles distinguishability based on connecting the wavelet multi- distinguishability with autocorrelation fractal dimention, uses four kinds disfigurements of knag 、 bark pocket 、 wormhole and molder as output of distinguishability typtles,uses L-M Calculation methods to train BP neural network.

本文以小波多分辨率下自相关分形维数作为木材缺陷类型识别的特征量，以夹皮、腐朽、节子、虫眼四种缺陷作为识别类型输出，选用L-M算法对BP神经网络进行训练。

This paper proposes an algorithm for Fetal Electrocardiogram extraction, which is based on joint maximization of kurtosis and autocorrelation.

针对胎儿心电图提取问题，提出了一种基于峭度和自相关函数联合最大化的算法。

Soil carbon,soil total N,and pH belonged to high and soil total P belonged to medium degree spatial correlation at 60m lag intervals,respectively.However,there were significant differences in ranges of spatial autocorrelation among four soil properties,among which the effective range of soil organic carbon was the highest(261m),followed with soil total N(208m),pH(156m),and soil total P(133m).

在60m步长间隔尺度下，土壤有机碳、全氮和pH有强烈的空间相关性，土壤全磷空间相关性为中等程度。4种土壤养分的空间自相关范围具有明显的差异，有机碳的有效变程最大(为261m)，全氮(208m)和pH(156m)次之，全磷的有效变程最小(133m)。

Maximum likelihood estimation of spatial lag and spatial error regression modes, some specification tests for spatial autocorrelation and optimization methods for ML are also set forth in this section.

在标准回归模型中可以以两种截然不同的方式来合并空间相关：一是将空间相关表示为因变量的一个空间滞后，二是将空间相关表示为一个误差项的空间自回归结构。

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。