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GEOMETRIC PHASE OF ELECTROMAGNETIC FIELD IN WAVE VECTOR SPACE 波矢空间中电磁场的几何相位
wave vector space 波矢量空间
The Derivative of a Map between Vector Spaces. 向量空间之间映射的微分。
Wave vector resolved surface densities of states and band structure along the surface Brillouin zone are presented. 采用层轨道表象及表面投影技术 ;给出了 (313)表面在二维布里渊区高对称点的波矢分辩的电子态密度和表面投影能带结构 .
We have discussed sum for subspace of vector space, and cannot popularize sum of subspace to infinitude. 摘要对向量空间的子空间的和的概念不能推广到无限多个子空间的情形进行了讨论。
Compared with the vector space model, the probability model is more effective on describing a users interests. 对比实验表明,概率模型比矢量空间模型更好地表达了用户的兴趣和变化。
Open Bookmark uses the vector space method and social filtering to get useful information for the users. OpenBookm ark使用向量空间法和社会过滤两种信息过滤方式帮助用户获取有用信息。
It is found that under little axial strain,armchair carbon nanotubes are still conductors,but Fermi wave vector,Fermi dot and the effective mass near Fermi face are changed. 在小的轴向拉伸下,扶手椅型碳纳米管仍然是良好的导体,但其费米波矢、费米点及费米面处的有效质量都发生了变化。
There are many different types of abstract space in mathematics, for examples, vector space, inner product space, etc. 数学上存在各种不同的抽象空间，例如向量空间，内积空间等。
A new hybrid evolutionary LSF codebook optimization algorithm is proposed based on the vector space stretching. 本文提出了一种新型的基于对LSF矢量空间进行拉伸变化的混合进化码书优化算法。
Mathematicianstalk about axioms, integrals, and vector spaces. 数学家谈论的是公理、积分和向量空间。
Through the vector space model, text clustering, genetic algorithms to try a new method summary of the text. 通过空间向量模型、文本聚类、遗传算法等成熟的技术尝试一种新的文本摘要方法。
We propose a text vector space model (VSM) based on suffix tree and implement a text categorizing system on the model. 摘要本文在面向网络内容分析的前提下，提出了一种基于后缀树的文本向量空间模型(VSM)，并在此模型之上实现了文本分类系统。
In this abstract setting, the scalars with which an element of a vector space can be multiplied need not be numbers. 向量空间是在域上定义的，比如实数域或复数域。
The Brillouin scattering tensers and the stiffening Christoffel equations in (100), (010), and (001) planes of C2v point group crystals are obtained at arbitery wave vector directions. 简述了应用布里渊散射测量晶体的弹性和压电系数的方法;推导了C_(2v)点群晶体(100);(010)和(001)晶面内任意波矢方向的布里渊散射张量及声速各向异性方程.
This paper introduces a text clustering method based on VSM (vector space model). 摘要研究了一种基于向量空间模型的文档聚类方法。
By introducing "complex wave vector" and applying the Bloch theorem to the N-layer-based SLs, we derive general formulae to calculate the localized electronic states in the infinite SLs with structural defects. 利用复波矢将布洛赫定理运用到多组分超晶格中,推导了计算多组分含结构缺陷超晶格中局域电子能级的公式。从数值上研究了含结构缺陷的三组分超晶格中局域电子态的性质,详细地比较了对称结构和不对称结构中局域电子态的差异。
Against the characteristic of electromagnetic wave propagating in left-handed material, researches on surface wave producing condition, draws wave vector equation of TE, TM polarization surface wave. 针对电磁波在左手介质中的传播性质,研究了表面波产生的条件,得出了TE、TM偏振表面波波矢方程。
The experimental result shows that the performance of simple SLM-CIR model should be superior to simple vector space models and probability models. 实验结果表明:简单的SLM-CIR模型的性能要优于简单的向量空间模型和概率模型。
In the paper, a method is proposed based on vector space model making use of the structure to effectively retrieve HTML document. ? 应用了向量空间信息检索方法,扩展了传统的信息检索,利用HTML文档结构提高了在WWW环境下的检索效率。