向量和

This paper introduces some common query expansion approaches in relevance feedback based on probability model and vector space model,then a new term selection method is introduced based on language model,which takes into account two features of expanded terms-"relevance"and"coverage".

本文介绍了概率模型和向量空间模型下的常用查询扩展方法，并提出了一种基于语言模型的相关反馈方法，该方法同时考虑了扩展词应该具备的两个特征，即相关性和覆盖性。

The results show that jet fuel price mean and profit mean were influenced by initial value of change probability vector and adjustment rate of jet fuel price.

结果表明，航油价格均值和利润均值与价格变化概率向量初值和价格调节率有关。

This paper introduces some common query expansion approaches in relevance feedback based on probability model and vector space model,then a new term selection method is introduced based on language model,which takes into account two features of expanded terms-"relevance"andco...

本文介绍了概率模型和向量空间模型下的常用查询扩展方法，并提出了一种基于语言模型的相关反馈方法，该方法同时考虑了扩展词应该具备的两个特征，即相关性和覆盖性。在TREC测试集上对这些算法进行了比较，结果表明这种新算法在平均准确率上比传统方法有所提高。

Applling the key techniques of text topics classification to text sentiment classification In this paper, using three kinds feature selection methods (information gain, mutual information and chi-square statistic), and two kinds probability computer, and support vector machine to construct the classifier, text sentiment classification are studied.

本文采用了信息增益、互信息和x~2统计三种特征选择方法以及布尔和频率两种概率估算方法，对文本情感倾向分类进行了实验研究，选择支持向量机技术构造分类器。

To solve the problem encountered in finding a proper rotation matrix and translation vector, approximate and precise solutions are provided successively. The approximate one has the advantage of utilizing existing solution, with limited range of weight to choose from. The precise one has no limit to weight, and can also prevent the problem of obtaining a mirror matrix of the correct one. Besides, it permits the'hat'to be amplified to fit the size of'head'.

其中近似解可以直接套用现成的公式计算，但是权重的选择余地不大，而精确解则无此限制，而且从理论上解决了不同权重下求解旋转矩阵和平移向量时，可能出现错误的旋转矩阵的问题，并允许在配准时对"帽"进行缩放以适应"头"和"帽"的大小不匹配的问题。

As Wikipedia puts it "WPF aims to unify a host of application services: user interface, 2D and 3D drawing, fixed and adaptive documents, advanced typography, vector graphics, raster graphics, animation, data binding, audio and video.".

作为语言的说法" wpf的目的是统一的一系列应用服务：用户界面，二维和三维制图，固定和自适应的文件，先进的印刷术，向量图形，光栅图形，动画，数据绑定，音频和视频"。

The Vector Auto Regression and lmpulse Respond Function models are mainly used in analyzed the quantity and time effects.

同时利用向量自回归模型以及脉冲反应模型分析了我国利率政策和货币供应量对价格和产出的数量效应以及时间效应。

It is proved that the"feedback linearization" certainty equivalence control law with"regressor vector-based"update law can guarantee the real output to track reference output in relative degree one case.

当控制对象的相对阶为1时，我们证明了采用"反馈线性化型"确定性等价控制律，和"基于回归向量"的自适应律，可以保证实际输出有界跟踪参考输出；当控制对象的相对阶大于1时，控制律和自适应律的结构保持不变，但是构造自适应律的信号采用了由跟踪误差得来的"增广误差"。

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

Three-dimensional dynamic finite element methods and theories , improved the Ritz vector method and vibration shapes superposition method are applied to analyze and calculate the dynamic response of drilling string.

本文采用三维动力有限元理论方法和改进的Ritz向量法及振型迭加法对钻柱进行了动力响应分析和计算。

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。