特征向量

It extracted useful visual features and used one-class support vector machine to identify and filter spam.

它提取出有用的形象特征并使用一类支持向量机来过滤垃圾邮件。

It extracted useful visual features and used one-class support vector machine to identify and filter spam. The experimental results indicate that the proposed method can get satisfactory filtering effect with higher detection rate and lower false positives.

它提取出有用的形象特征并使用一类支持向量机来过滤垃圾邮件实验结果表明，该系统模型具有令人满意的过滤效果，并且有很高的探测率和较低的误判率。

In this algorithm, first, the nonlinear kernel mapping is used to map the face data into an implicit feature space, and then a linear transformation which produces orthogonal basis functions is performed to preserve locality geometric structures of the face image.

该算法首先利用核的方法提取人脸图像中的非线性信息，并将其投影在一个高维非线性空间，在保证各向量正交的同时，通过局部保持投影算法做一线性映射，从而更好地提取人脸非线性局部邻域结构特征。

An Ozone nowcasting model based on phase space and Support Vector Machines is represented in this paper.

本文利用臭氧浓度时间序列资料重构了该光化学系统的相空间，然后沿着系统演化的相轨道用最小二乘支持向量机建立了臭氧临近预报模式，并用上海市普陀站的臭氧观测资料做了提前1-8小时和提前24小时预报试验，结果表明这一模式能够较好地模拟臭氧浓度变化的非线性动力学特征，预报效果好。

Scatter matrix ; principal component analysis ; eigenvector ; feature extraction

散布矩阵；主成分分析；本征向量；特征提取

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。

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。

The images of ranbutan were obtained by CCD camera. Image processing algorithm of OSTU and area labeling were applied to 48 rambutan images in order to remove the images of background and stem, and the texture features of color and lustre were extracted. A multi-grade support vector machine was set up, and color and lustre features were the inputs of DAGSVM.

通过CCD采集红毛丹可见光图像，经OSTU分割算法来分割图像背景后，采用面积标记算法得到去除长穗梗区域的红毛丹图像；然后提取基于色度的红毛丹图像的彩色纹理特征，并用多分类支持向量机的模式识别方法来识别红毛丹色泽等级。

In the ER-Tree, the efficiency of retrieval could be improved by the ways of partition of the vector space with hyper-sphere and R*-Tree s re-insert technology introduced to enhance ER-Tree s capability to represent the data-sets'features.

该索引树用超球体划分多维向量空间，以有利于计算最近邻；吸取R*-Tree树的重插技术，以增强索引树对数据集整体特征的表达能力，从而提高检索效率；通过引入插入安全点和删除安全点概念，有效地提高建树的效率。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。