特征向量

Also in the 3-D space, we assign the 20 amino acids to 20 vertices of the dodecahedron. By the symmetry of the dodecahedron we obtain 3-D representation of 20 amino acids, and 3-D graphical representation and the corresponding numerical sequence of protein sequences. And similarity and dissimilarity analysis based on the invariants of graphs and characteristics of numerical sequences are given for nine RNA secondary structures of RNA-3 of virus. We construct sequence phylogenetic tree of a group of cytochromes C protein.

在DNA三联体密码子表示的基础上，在半复平面上给出了蛋白质序列的非退化的2-D图形表示，同时利用复向量的主要特征—模和相位，给出了蛋白质序列的一种数值刻划，进一步在3-D空间里，把20种氨基酸分别分配给正12面体的20个顶点，根据正12面体的对称性得到了20种氨基酸的3-D表示，进而得到了蛋白质序列的3-D图形表示和对应的数字序列，并利用图的不变量和数字序列的特征比较了9种动物的神经元

By doing so, the dimension of attribute can be reduced effectively, the noise can be filtered successfully and the underlying semantic structural relation will be stressed.(3) The dissertation carries on expanded research on double-bases cooperating mechanism in terms of pattern, discusses and proves the important structure mapping theorem of the above mechanism.

该方法通过小波变换及潜在语义索引算法将向量空间模型中的"特征词项空间"转化为Hilbert子空间——"概念空间"的范畴，从而有效地降低了特征项维数、过滤掉文本数据中的噪声、突出了文本数据的深层语义结构关系。

By this approach, the structural features and statistical features of characters are firstly extracted, then they are normalized to the input vector of neural network, and RBF neural network is used for recognition.

该方法首先提取字符的结构特征和统计特征，以它们作为神经网络的输入向量，然后用RBF神经网络进行识别。

In order to solve the problems of the vector quantization error and the excessive computation complexity arising from audio features, this paper proposed a new automatic audio classification method based on PCA and CHMM.

针对DHMM分类器对音频特征进行向量量化引起的误差及特征维数过多导致计算复杂度过大的问题，提出了一种新的基于PCA和CHMM的音频自动分类方法。

Gabor-ring is often used in texture feature extraction, but it is based on the assumption that texture is narrowband signal and can not applied to most actual textured images that have more than one center frequency in power spectrum. To overcome the limitation of existing method, an improved method is proposed. According to this method, Gabor filters are constructed in accordance with the spectrum feature vector of texture, and a relaxation parameter is used to determine the effect of difference filters so as to integrate the frequencies and phases into the process of extraction.

Gabor环（即在频率域成环形分布的Gabor滤波器组）常被用于提取图像纹理特征，但它是以"纹理是窄带信号"为基础的，实际的纹理图像并不能很好地满足"窄带信号"的假设，用一个中心频率来描述一种纹理对能量集中在多个频率点的纹理图像往往不能取得理想的效果，而根据频谱特征值向量构造Gabor环的改进方法，通过松弛因子的加入改变不同滤波器的作用强度，综合考虑了多频率多相位对纹理特征提取的影响。

The essential mathematical feature upon which this technique is based is that a square m*m matrix C of non-negative real numbers representing, for example, pairwise comparisons of the importance of element of the next higher tactics level has a characteristic equation which yields a dominant eigenvalue λ and a cprresponding right eigenvector x

基本数学特征后，该技术的基本思想是方形m*M矩阵三非负实号码代表，例如成对比较的重要组成部分，未来较高的战术水平有一个特性方程而产生主导特征和cprresponding权向量xwherec=与cij和cij=满足一致性条件

The paper simplifies the joint diagonalization of matrices into optimization problem which only includes the eigen matrix. For solving the problem conveniently, each row vector of the eigen matrix is parameterized, then utilizes the improved genetic algorithm to get the optimal parameter.

摘要该文首先将矩阵联合对角化问题化简成一个只含有特征矩阵的优化问题，为了便于求解，文中将待求特征矩阵的每一列向量进行参数化处理，并利用改进的遗传算法寻找最优的新参数。

The SVM has the basis limited sample training to obtain good exude ability,and it\'s an general learning machine,it maps the original space into high dimensional characteristic space,makes the original classified question become a linear separable question in the characteristic space.

支持向量机具有依据有限样本训练获得良好的泛化能力，并且是一个通用的学习机，它将原空间映射到一个高维的特征空间里，使原分类问题在特征空间里成为一个线性可分的问题。

According to the previous studies, a method combining the feature analysis methods of sequences with support vector machine technology was proposed for identifying GPCRs and their type by analyzing the characteristics of sequence differences.

在前期工作的基础上，作者将序列特征分析与支持向量机技术结合起来，通过分析序列的特征差异，对G蛋白偶联受体分子及其类型进行识别。

Using singular vector and eigenvector matrix as the features of flight maneuver not only has the results of dimension reduction and data denoising,but also unifies the flight maneuver data of different length to the same dimensionality.

将奇异值向量和特征矩阵作为飞行动作的特征，不仅具有数据降维和去噪的效果，并可将不同长度的飞行动作数据统一到同一个维度。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷