查询词典 vector

Four new relative efficiencies of the best linear unbiased estimator to the covariance improvement estimator for the unknown parameter vector are given, and three new relative efficiencies of the least square estimator to the covariance improvement estimator for the unknow parameter vector are given.

本文考虑相依模型，对其未知参数向量给出了其最佳线性无偏估计相对于协方差改进估计的四种相对效率，同时，还给出了最小二乘估计相对于协方差改进估计的三种相对效率，在不同条件下，分别给出了相对效率的上界与下界。

According to the varied kinds of the retrieve models in the course of the design and our practical situation,we put forward a new information retrieve system combining the Boolean logical model and the Vector Space retrieve model,which is named extended weighting vector space retrieve model.

在系统的设计实现过程中，我们根据上文提到的不同检索模型，结合我们的实际情况，提出了一种结合布尔逻辑模型和空间向量模型的新的检索系统，即扩展的加权向量空间检索模型。

However,in this paper,it is first introduced sequential convergence C and L*- space which is a vector space giving some relation:xmCx between sequences and points in it,then the bounded set is defined in vector space.

设C为一序列收敛关系，T是由C确定的拓扑，B是由C确定的有界集族，则有B=BT(C，并进一步从L*-空间构造了包囿拓扑向量空间。

Vector mainly in plane geometry, Cartesian coordinate system, trigonometric functions, such as knowledge-based, learning through Vector, on the one hand, our mathematical expression of understanding entered a new field, on the other hand will enhance our space imagination capacity, the ability of thinking and analysis, the ability to solve practical problems.

向量主要以平面几何，直角坐标系，三角函数等知识为基础，通过向量的学习，一方面将我们对量的数学表达式的认识进入到一个新的领域，另一方面将增进我们的空间想象能力，思维能力和分析，解决实际问题的能力。

It is pointed out that the category of L-fuzzy topological vector spaces is isomorphic to the full subcategory of the category of I -fuzzy topological vector spaces, whose elements are induced I -fuzzy topological spaces.

指出了格值模糊拓扑线性空间范畴同构于I型fuzzy线性拓扑空间范畴中诱导空间构成的满子范畴。

We also give a simple formula to determine the characteristic vector of L^{+} from the characteristic vector of N.

我们也会给定一个简易的运算式，它能够从N的特徵向量来导出G^{+}的特徵向量。

Finally these characteristic point calculation a characteristic vector, person face characteristic in the database the vector proceeds to match.

最后把这些特征点计算成一组特征向量，同数据库中的人脸特征向量进行匹配。

From Poisson matrix, we can observe volume-preserving vector fields. By using Geiges-Gonzalo's existence of contact circle Theorem [3] , we show the existence of volume-preserving circle on3-manifolds which says that every3-manifold admits two linear independent vector fields preserving a same volume form.

通过Poisson矩阵可以观察出保积向量场，再利用Geiges-Gonzalo的接触圆存在性定理[3]，我们证明了保积圆的存在性：每个闭的3-流形上都存在两个处处线性无关的保积向量场并且它们的常系数线性组合仍是保积向量场。

We present two methods for generating a segment of circular arc by the vector valued continued fractions. Based on this method we construct a parametric rational arc spline that is GC〓 continuity. By adjusting the given tangent vector, this parametric rational arc spline also has convexity preserving property and monotonicity preserving property.

本文利用向量连分式给出了两种快速生成圆弧的新方法；在此基础上，本文还构造了一种GC〓连续的可调参数有理圆弧样条，在实际操作中，通过调整一侧端点的切向量，可使上述圆弧样条曲线保凸，保单调。

Two methods to draw productive technical plane figures of cutting areas are developed in the paper:one is vector, by which surveying data are put into system and processed to calculate the area and closing error, and finally graphical file is established in vector format.

由外业测量数据的输入，经系统处理得出面积、闭合差，并最终形成矢量图形文件；其二为栅格法。

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。