向量和

We explored the single-trial estimation of P300 from channel Pz using support vector machine in three subjects, and gained a satisfied classification accuracy, which is 91.3%, 88.9% and 91.5% respectively. These results demonstrated the advantages of the inducing paradigm in constructing our mental speller.

本文利用支持向量机分类器对三名被试的脑电信号的载波成分进行了单次提取，特征数据来自通道Pz，以300ms~600ms时段的P300成分作为特征信号，对靶刺激的正确识别率分别为91.3%、88.9%和91.5%，证明了诱发模式的先进性，为系统的实现打下了基础。

The statements below compare and contrast link state and distance vector routing protocols. Which of these are true? Choose two

下列关于链路状态协议和距离向量协议的比较说法中，正确的是哪两个？

Based on the statistical learning theory and optimization theory, SVMs have been successfully applied to many fields such as pattern recognition, regression and etc.Training an SVM amounts to solving a convex quadratic programming problem.

它将机器学习问题转化为求解最优化问题，并应用最优化理论构造算法来解决问题，本文主要是从最优化理论和算法的角度对支持向量机中的最优化问题进行研究。

The parameter of the support vector machine and the length of sliding step in smoothing the power spectrum are determined by experiments.

通过实验确定了支持向量机核函数的参数和功率谱平滑的滑移步长。

In the third part, we study an application of stereographic projection transformation in statistics, deriving Box-Muller formula (use two independent uniform random number to generate two independent standard normal random number) and spherical symmetric distribution (a product of a positive random variable and a random vector with uniform distribution) in multivariate statistical analysis.

第3章，研究了球极投影变换在统计中的应用，通过球极投影变换获得了利用两个相互独立的均匀随机数生成两个相互独立的标准正态随机数的Box-Muller公式以及多元统计分析中的球对称分布（一个正的随机变量和一个与之相互独立的均匀分布的随机向量的乘积）。

In order to overcome blurring effects of linear filters, partition-based weighted sum filter utilizes vector quantization method to partition the observation space, and filters each partition separately.

为了克服线性滤波会模糊边缘的缺点，采用基于分割的加权和滤波器利用向量量化方法来分割图象，并对各分区进行不同的滤波操作。

In this paper we consider about a parallel method for finding all the eigenvalues and corresponding eigenvectors of a real symmetric tridiagonal matrix.

本文讨论了一种求解实对称三对角矩阵全部特征值和特征向量的并行算法。

And local coordinate representations of left invariant symplectic structure and symplectic left invariant vector field on the Symplectic-Lie group are given.

还给出了辛李群上左不变辛结构和辛左不变向量场的局部坐标表示。

After illustrating the conception pseudo-symplectry ,the evolvement and extension of the conception symplectry and the formation of pseudo-symplectic space ,the nature of pseudo-symplectic space and the inner relationship and differences between pseudo-symplectic space and symplectic space are reflected here.

通过对辛空间的深入分析和研究，从空间中的度量与向量的迷向性问题入手并展开较为详细的讨论，定义"伪辛"的概念，阐述"辛"概念的演变、扩充与伪辛空间生成的事实，进而揭示伪辛空间的本质属性及其与辛空间的内在联系与区别。

The algorithm of the static voltage stability region s tangent plane through the characteristic vector method or the implicit function derivative method is presented in the total parameter space,which can provide quantitatively the influence degree of all kinds of parameters on the voltage stability region.

提出了基于全参数空间的静态电压稳定域的2种切平面计算方法：特征向量法和隐函数求导法。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。