查询词典 dimension theorem

This thesis mainly discuss following issues, Theory and simple expressions for array covariance matrixes are derived when angular spread functions are symmetric distribution functions, i. e. the Uniform distribution, the Gauss distribution, the Laplace distribution and the Von Mises distribution, and a non-symmetric distribution function, i. e. the Gamma distribution. And the relation between the effective signal subspace and the array number, or and the nominal angle of the distributed source, the angular spread, the distributed functions, and the Signal-to-Noise Ratio is gained. The dimension of the effective signal subspace increases with increment of the array number. And it is more obvious to the non-symmetric distribution. The dimension of the effective signal subspace decreases with increment of the nominal angle. And the distributed source is equal to a point source as θ=π/2. The dimension of the effective signal subspace increases with increment of the angular spread.

本论文针对阵列信号处理中广泛存在的分布源现象，主要讨论了以下问题：推导了角度分布函数分别为对称的均匀分布、高斯分布、拉普拉斯分布、Von Mises分布和非对称的伽马分布时，分布源阵列接收信号协方差阵的严格模型和简化模型，得到了单个分布源的有效信号子空间随阵元数、分布源中心角、分布角、角度分布函数和信噪比的变化规律：随着阵元数的增加，对所有角度分布函数的有效信号子空间维数也随着增加，且非对称分布函数的有效信号子空间充满整个空间的可能性更大；随着分布源中心角逐步增加，有效信号子空间维数逐步减小，当θ=π/2时，等价于点源情形；随着分布源分布角逐渐加大，有效信号子空间维数也随之增加，直到有效信号子空间充满整个空间；随着信噪比的增加，有效信号子空间维数有一定程度的减少。

We also calculate the capacity-dimension, information-dimension and correlation-dimension of the light curve.

一个用Weierstrass函数构造的分形曲线与OJ287的历史光变的线性相关系数达到了0.73。

In this paper dimension-chain is used to calculate the last effective dimension formed under the influence of tolerances and other distortions. Feature modeling is applied to construct the three-dimension mode of the parts in solidworks. Based on the parametric design function, simulation of assembling result is realized by making use of VB to develop Solidworks. The accomplish of variable parametric design system in tolerance designing is realiazed.

运用尺寸链技术计算出零件在公差及其他变形影响下的最终作用尺寸，利用solidworks中特征建模方法建立起装配体的三维模型，并根据该软件的参数化设计功能，利用VB对其进行二次开发，模拟了装配结果，实现了变参数设计方法在公差设计评价技术上的应用。

Three dimension modeling technique includes three dimension finite element method, three dimension photoelasticity experiment method and modeling with other materials.

该技术包括三维有限单元计算数值模拟、三维光弹实验模拟和其它材料的工程实验模拟技术。

In this paper, We only analyse the projective transformation in3- Dimension space, explain the geometric significance of its column and row's correlation coefficient and give the method of changing the non-full rank projective transformation of3- Dimension to2- Dimension.

对三维空间中的射影变换加以分析，说明其行、相关系数的几何意义及将三维非满秩射影变换改为二维满秩射影变换的处理方法进行探索，这对计算机辅助设计中的图形处理和建立图形数据库是有利的。

But the finite difference methods require that the computational domain is regular, and usually people construct the finite difference scheme for one dimension and then extend it to two or three dimensions in a dimension by dimension fashion.

有限差分方法要求计算区域比较规则，随着工程问题的复杂化，计算区域也变得复杂，这对数值方法提出了新的挑战。

But the finite difference methods require that computational domain is regular, and usually people construct the difference scheme for one dimension and then extend it to two or three dimensions in a dimension by dimension fashion.

有限差分方法要求计算区域比较规则，而且人们往往是对一维方程构造差分格式，再用分裂方法将其推广到多维。

The "spiculation"sign raised accurate rate of the diagnosis by 11.8%.Conclusion Real-time three-dimension ultrasound is a good supplement of two-dimension ultrasound.It can give more diagnosis information of the breast mass,especially to the small mass which can not be diagnosed definitely by two-dimension ultrasound.To analyse the characteristics of coronary section will improve the diagnosis accurate rate of the breast cancer.

三维超声是对二维超声检查的一个补充，它为诊断乳腺肿块的良恶性多提供了一些观察的指标，尤其对那些在二维图像上不能明确诊断的小肿块，加用三维扫查，注重分析冠状切面特点，有助于提高诊断的正确率。

In addition, the paper analyzed the influence of fractal dimension values on the compaction characteristics, and indicated that the fractal dimension values was the representation of gradation, the gradations with different fractal dimension values had different compaction process and energy dissipation, but the trend of compaction curve was consilient.

通过分析分维值对级配压实特性的影响，认为分维数是级配的表征，不同分维数级配的压实过程以及压实耗能也不一样，但其压实曲线变化趋势一致。

You should regard others as the same of yourselves in the three dimensions of teaching the knowing dimension, the power dimension, and the ethics dimension (this is the taxonomy by Fouler, who is the famous French postmodern thinker ).

将心比心应发生在教学中的认识、权力与伦理三个维度（著名后现代主义思想家福科的观点）。

A historical region of southwest France between the Pyrenees and the Garonne River. The duchy of Aquitaine was joined with France after the marriage of Eleanor of Aquitaine to King Louis VII in1137, but its possession was disputed after her subsequent marriage to Henry II of England.

阿基坦法国西南部一个历史地区，位于比利牛斯山和加隆河之间，在1137年阿基坦的埃莉诺与国王路易斯七世结婚之后阿基坦公国加入法国，但当她再嫁英国亨利二世后，其归属权便受到争议

There are moments when I look at the smiling , happy faces of my expectant staff and wonder how they will cope when confronted by an outraged housemaster along with an unrepentant and recalcitrant bleached blond teenager in 18 years ' time .

有时候，我看着那些满怀期待的员工微笑，幸福的脸，想着当他们遇到一位愤怒的宿舍管理员和一位不知悔改，叛逆，而且将头发染成白色的18岁少年时，他们会如何处理。