In this note, using the spectral theory of linear operators, a spectral representation of infimum of two self-adjoint operators with respect to the logic order is established. 本文利用线性算子的谱理论给出了逻辑序下两个自伴算子下确界的谱表示。
In consideration of large computational efforts of Deodatis simulation, a modified spectral representation method was proposed for simulating the fluctuating wind field of long span bridges. 基于自然风特性及模拟点间的风速时程相关性,采用谐波合成法模拟了南京大胜关长江大桥的拱肋脉动风速时程。
Application of Fourier transform infrared spectrometer the spectral representation 傅里叶变换红外光谱在橡胶研究中的应用
Based on the spectral representation theorem of stationary stochastic processes, in this paper, a method is propesed for Monte Carlo simulation of stationary stochastic processes by the fast Hartley transform. 由平稳随机过程谱表示定理导出了平稳随机过程蒙特卡罗模拟的一个快速Hartley变换方法。
Based on effective medium approximation, self-consistent mean field approximation and the spectral representation method were adopted to investigate the temperature dependence of optical bistability of metal/ dielectric granular composite. 应用有效媒质近似,结合自洽平均场理论和谱表示方法,研究了金属电介质颗粒复合介质的光学双稳行为与温度的关系。
Using Schrodinger wave function in quantum field theory, the time-dependent Green func-tion and its spectral representation for 2-fermion system are derived, and the Schrodinger equa-tion as well as the normalization condition of his wave function are deduced. 使用量子场论中的Schrodinger波函数描述2-费密子系统。导出了时间相关Green函数及其谱表示。
With the spectral representation method, 19 samples of fluctuating wind load are simulated considering the vertical co relation. 采用频谱表示法,仿真得到了作用在合肥电视塔上的与塔高竖向相关的19条脉动风荷载时程样本。
And compact normal operators have some more excellent properties, such as its spectral representation, functional calculus and so on. 而正规的紧算子具有一些更好的性质,如正规紧算子具有离散的谱表示,正规紧算子的函数演算等。
A Spectral Representation of Nonlinearity and Correlativity on P& Value Logical functions is presented in this paper. 本文给出了P&值逻辑函数的非线性度和相关度的谱表示。
Studies on Thermal Degradation of Polybenzimidazole by FTIR THE SPECTRAL REPRESENTATION 红外光谱法研究聚苯并咪唑的热降解性能
Proper orthogonal decomposition ( POD) of random multivariate processes was defined firstly. Then, a series of practical expression of the spectral representation method on the basis of POD was given, which can be accelerated by FFT. 定义了随机向量过程的特征正交分解,推导了特征正交分解型谱表示法的模拟表达式,该算法可用FFT加速。
To improve classification reliability, a Gaussian Radial Basis Function ( RBF) is chosen on the Spectral Histogram Representation and the Support Vector Machines ( SVMs) is used as classifying function. 为了保证分类的可靠性,选择高斯径向基函数(RBF)进行谱直方图表示,采用支持向量机(SVMs)作为分类函数。
Direct Determination of the Content of Glycerin by ATR-FTIR THE SPECTRAL REPRESENTATION 衰减全反射红外光谱法直接测定丙三醇的含量
In time domain buffeting analysis, wind velocity field for the cable-stayed bridge is simulated by the spectral representation method. 时域抖振响应分析中,采用谱解法模拟了斜拉桥的脉动风场,抖振力采用准定常表达形式,自激力采用Y。
The Ordered Spectral Representation of Normal Operators 正常算子的有序谱表示
That is if the concept of absolute confinement is introduced, we must discard a part of elementary hypothesis of spectral representation theory. 也就是如果引入绝对禁闭的概念,必须放弃谱表示理论的一部分基本假定。
The conditions of regularity and singularity and spectral representation of wold's decomposition for bivariate Stationary Sequences 二维平稳序列的正则奇异条件及WOLD分解的谱表示
Error assessment for wind fields generated by the original spectral representation method 谱表示法模拟风场的误差分析
When applying Spectral Histogram Representation ( SHR) for texture classification, each image window is represented as a feature vector consisting of histograms of filtered images, and the histograms are concatenated to form the spectral representation for the image. 在纹理分类中采用谱直方图表示(SHR),每个图像窗表示一个包含滤波后图像直方图的特征向量,而直方图是图像谱表示的连接桥梁。
A combination of the wave superposition method and the modified spectral representation method is applied to a wind field simulation for whole bridge including the deck and the towers. 将谐波合成法与修正的谱描述法结合用于大跨度桥梁主梁及桥塔上的随机风场模拟。
Then, the classical spectral representation method based on power spectrum density functions is applied, and Davenport spectrum is used to generate wind speed histories of a given field. 然后,应用经典的基于功率谱密度函数的谱表现方法,结合Davenport谱生成了目标场地的风场;
The proper orthogonal decomposition ( POD)-based spectral representation method is used to digitally simulate wind fields around bridges with wind passage effects. 将特征正交分解型谱表示法运用于模拟具有桥塔风效应的桥梁风场中。
Spectral Representation of the Full Gravity Tensor 全张量重力梯度数据的谱表示方法
By combining with the modal truncation technique, the simulation formulas for proper orthogonal decomposition ( POD) based on the spectral representation method were derived. 结合模态截断技术,导出了特征正交分解型谱表示法的随机模拟公式。
(ⅱ) Based on the theory of spectral representation the concept of absolute confinement is unallowable, even the absolute confinement is taken as the limit of relative confinement. (ⅱ)在谱表示理论基础上不能允许绝对禁闭的概念,即使把绝对禁闭作为相对禁闭的极限也是一样。
With the increase of the initial attack Angle, reduced stability of Bridges. ( 3) Adopts MATLAB software, using spectral representation and fixed inverse Fourier transform method simulate fluctuating wind field of bridge. 随着初始风攻角的加大,桥梁的稳定性降低。(3)运用MATLAB软件,采用谐波合成法与修正逆傅里叶变换法模拟了桥梁的脉动风场。
The time domain module and the digital spectral representation of the periodic nonuniformly sampled signal are derived and the influence of sampling nonuniformity on the sampled signal is analyzed. 本文首先研究了周期非均匀采样的原理,给出了周期非均匀采样信号的时域模型和数字频谱的解析表达式,分析了非均匀采样对采样信号频谱的影响。
Consequently, study on the following aspects will be included in this dissertation. ( 1) Concerning how to simulate stochastic wind velocity fields more accurate by using the POD-based spectral representation method. 主要工作包括以下方面:(1)研究了用POD型谱表示法来精确的模拟高层建筑风场。
Furthermore, the POD-based method can be employed to simulate the wind fields including wind passage effects. ( 2) Concerning the detailed error assessment of the two types of spectral representation methods, both analytical and numerical. 给出了POD型谱表示法模拟具有桥塔风效应风场的简化算法。(2)对两类谱表示法在理论上和数值上进行了精细化的误差分析。
This dissertation is based on spectra theory of graphs and statistical theories. In this dissertation, we investigate graph spectra and spectral features, relational graph representation and clustering in low dimensional spaces. 本文以图的谱理论和统计理论为基础,研究关联图的谱及谱分解特征、关联图的低维空间的表达和聚类分析。