分类空间

In the classification of QSIC, the notion of affine finiteness of a space curve is put forward.

在对两二次曲面交线的拓扑分类中，本文提出了空间曲线的仿射有限性这一性质。

This method represents the virtual objects in Euclidean space instead of in affine space, which is consistent with the popular graphics rendering tools such as OpenGL and is more common in practice. A new classification based local and global tracking strategy to match features between the reference image and the currently frame directly is presented, which enables the augmented reality system working effectively even under large changes of viewing angles. A novel affine coordinate system definition method based on a collection of feature points is also proposed, which makes the tracking method effective even when not all the reference points are detected during the whole process, as long as there are at least four pairs of reference points correspondences.

该方法以仿射变换为桥梁来建立欧氏空间下的摄像机坐标系与世界坐标系之间的变换关系，它与OpenGL等当前流行的图形渲染工具一致，具有更强的通用性；采用基于分类的自然特征匹配策略，能够在视角和视点发生大幅度变化情况下依然正常工作；提出基于特征点集合的仿射坐标系定义方法，使增强现实系统在最小配置下只需4点追踪成功即可完成注册，比需要6点的透视投影方法具有更好的健壮性和精确性。

Local invariant feature ; object recognition ; image matching ; image classification ; scale space ; affine invariant moment ; detector ; descriptor

吉林大学；刘萍萍局部不变性特征；物体识别；图像匹配；图像分类；尺度空间；仿射不变矩；检测子算法；描述子算法

In this paper, a new real AdaBoost algorithm based on multithreshold method was developed. Through the selection method of multioptimization threshold and combining the strategy of weak classifier threshold selection in discrete AdaBoost algorithm, the rational division of sample space was implemented.

对基于连续AdaBoost算法的人脸检测方法进行了改进，结合离散AdaBoost中弱分类器的阈值选取策略，通过多重最优阈值选择方法实现了样本空间的合理划分。

In which the taxa and the formation of elements in the event that there are different degrees of relevance, in the geographical distribution of the performance space for a variety of duplication, or showed a certain alternating sequence.

其中各分类单元在发生和形成因素上有不同程度的相关性，在地理分布上表现为多种空间上的重复，或呈一定顺序的交替出现。

In this paper, algorithms of automatic text categorization are studied.

描述了文本的向量空间模型，并进行了常用文本分类算法的性能分析； 2。

We implemented a modular automatic text classification systems based on the vector space model and validate its feasibility.

实现了一个基于向量空间模型的模块化的文本分类系统。

The last two parts contain the four basic principles in Banach space, and the theory on the spectrum of operators.

最后两部分，Banach空间的四个基本定理和谱的一些基本性质和分类等。

A generalized moment-space-feature has been proposed, and has been applied to the faults classification and condition monitoring to three phase induction machine.

作者提出推广矩特征空间方法，GMFS方法能提供比传统的矩特征空间更多的信息，易于实现信号的辨识和分类。

This paper proposes a sentence space modeland a classification algorithm based on SSM.

提出了句子空间模型及基于句子空间模型的分类算法。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。