和向量

Firstly, The paper introduce two filtering model --Boolean model and Vector Space model.

本文在略述了信息过滤技术的产生背景后，介绍了两种比较常用的信息过滤模型--布尔逻辑模型和向量空间模型。

By the natural and harmonious relationship between differential forms and differential equations and between differential forms and vector analysis, we discuss the properties, which are covariant under the transformation of coordinates in the framework of differential forms, of particle motion in a central force field .

通过微分形式与微分方程和向量分析之间存在的自然而协调的关系，在微分形式框架下讨论了质点在有心力场中运动的特性并得出在坐标变换下其均是协变的

This curriculum primary coverage includes: Function and limit, a circular function derivative and differential, theorem of mean and derivative application, indefinite integral, definite integral, definite integral application, space analytic geometry and vector algebra, function of many variables differential method and application, multiple integral, curvilinear integral and surface integral, infinite series, differential equation.

该课程的主要内容有：函数与极限，一元函数的导数与微分，中值定理与导数的应用，不定积分，定积分，定积分的应用，空间解析几何和向量代数，多元函数微分法及其应用，重积分，曲线积分与曲面积分，无穷级数，微分方程。

According to the geometrical theory, the information of one-dimensional distributions and vector fields can be obtained after a completion of DAE.

根据DAE的几何理论，对DAE完备化能得到一维分布和向量场的信息。

Based on the theories of normal distribution and vector norm,a novel method for evaluating the effectiveness and precision of the sensor used in currency recognition is proposed.

基于正态分布和向量范数理论的方法，提出用于判断货币识别传感器的有效性和精确性分析方法，并建立了货币识别的性质模型。

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。

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。

Firstly, a scalar and vector potential analysis models of tooth-layer magnetic field in a two-degree-of-freedom motor is developed, which is the same as standard hybrid step motor. By applying the finite element method, the distribution of the tooth-layer magnetic field is studied in detail. It provides an effective means for further calculation of performance and parameters of the motor.

首先，对两自由度电机产生转矩的关键部分——齿层区域的磁场进行了细致深入的分析，提出了齿层磁场的标量位和向量位分析模型，并通过有限元的数值计算，对各种情况下齿层磁场的分布规律从微观上进行了形象的分析和研究，为完整电机的进一步计算提供了有力的工具。

Flex GIF Annimator supports pixel painter and vector graphic draw, support creating objects tween animation, and has a flexible palette options for full control over colors and built-in Windows trick banner maker, screen capturer, morpher, and nature image matting tool.

弯曲的GIF annimator支持像素画家和向量图形借鉴，支持创建对象吐温动画，并具有灵活的调色盘，选择完全控制权的颜色和内置的Windows的伎俩旗帜，制造商，屏幕上收集器， morpher ，与自然的形象，垫工具。

The paper studied the multiobjective semidefinite programming with a semidefinite constraint of a matrix function and a multiobjective function.

主要研究含矩阵函数半定约束和向量函数等式约束以及多个目标函数的多目标半定规划的对偶和鞍点问题。

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。