谱函数

The general closed formula of power spectrum density for multi-user aggregate pulsed UWB radio is given, which is the theoretical base for optimizing PSD design of UWB radio. We investigate the main system parameters impact to the PSD of UWB aggregate signals.

从理论上给出了基于超宽带冲激无线电方式的常规调制信号的功率谱密度函数的一般性表达式，为超宽带信号的功率谱优化设计提供了理论基础，研究了系统参数对超宽带信号功率谱的影响。

It followsthat it is possible to construct various kinds of regularization methods by combining the filter functions with the solution expression of compact operator equation.

文中给出了滤子函数的充分条件和三个最重要的滤子函数，其中，用第三个滤子函数构造的正则化是谱截断正则化，而用第一个滤子函数构造的正则化正是Tikhonov正则化。

A method of cross power spectral density between responses is derived and a poly reference modal analysis method using cross power spectral density method in frequency domain is presented in this paper.

对各测点响应的互功率谱密度函数进行了详细推导，提出了一种基于互功率谱密度的频域多参点辨识法，这意味着许多原本利用频响函数的传统频域识别法可以很容易地用于工作状态下的模态识别，大大开阔了未知激励下模态识别的视野。

On the basis of the power spectra of earthquake records, the parameters of the power spectral density function of the twice filtered Gaussian white noise process are determined by adopting the least squares procedure of a nonlinear function.

根据地震记录的功率谱，采用非线性函数的最小二乘法，确定了两次过滤Gauss白噪声过程的功率谱密度函数的参数。

The expansion coefficients Of aperture fields are Obtained after the three-dimensional arbitrary aperture fields have been represented by the sum of three-dimensional Gaussian function in the configuration-spatial wavenumber phase space.

本文利用Gabor原理把三维任意口面场表示成离散结构－波数相位空间中三维高斯基函数的叠加，将二维高斯基函数与相位空间谱双重正交的函数推广到三维，从而得到口面场展开函数。

For the one-dimensional p-Laplacian with indefinite weights, four sequences of periodic and anti-periodic eigenvalues are given by introducing the rotation number function, and these eigenvalues are the endpoints of the preimage intervals of the rotation number function at nonnegative integers.

本文以带变号权函数和带变号势函数的一维p-Laplacian为基本模型，系统地阐述了特征值的旋转数方法、带正权Dirichlet特征值的最佳估计、特征值在正则和奇异渐近半线性方程的可解性中的应用、Fucik谱的旋转数方法以及Fucik谱在周期解的扭转性和多解性中的应用。

We take the spherical harmonic functions as base functions on the spherical surface and other systems of orthogonal functions as base functions in the direction of radius. However.

据此，我们可以在球面上以球面调和函数为基函数而在半径方向以其它适当的正交函数系为基函数，从而构成一种混合谱方法。

First, the paper introduced the principle of the method,discussed the influence of sample interval of relaxation spectrum in the method and compared the method's result with the result from core mercury injection.

首先 ，介绍了基于梭状函数抽样的高分辨率弛豫谱反演方法的原理，并用该方法对岩心核磁数据进行了弛豫谱分解，讨论了弛豫谱抽样间隔对该方法的影响；其次，高分辨率弛豫反演结果和压汞结果的比较证明了弛豫谱反演方法的高分辨率优点。

The content involves Digital Filter, Auto Correlation, Cross Correlation, mean and standard deviation, probability density and probability distribution statistic, as well as Auto Power Spectrum based on Fast Flourier Transfer, Correct Power Spectrum, Cestrum and Frequency Response. The Short-time Flourier Transfer and Wavelet Transfer are included in the analysis program.

具体内容包括：数字滤波、时域加窗、自相关计算与互相关处理、均值和方差计算、概率密度和概率分布统计，快速傅立叶变换基础上的自功率谱、互功率谱、频率响应函数、相关函数、倒频谱分析；基于短时傅立叶分析的联合时频分析、小波变换等。

Based on the perturbation theory,the influences of the Fermi resonance interaction between the two and three vibronic levels on the level energy,wavefunction,and the spectral line intensity are investigated in detail respectively.

本文考虑了分子振动非谐性所引起的振动能级之间的费米共振相互作用，利用定态微扰论，从理论上系统地分析了两态和三态之间的费米共振相互作用对能级能量、态函数和谱线强度的影响，在三阶非谐性近似下，得到了计及费米共振相互作用在内的能级能量、态函数和谱线强度的数学解析表达式。

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。