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- This paper applies the improved information gain method to feature selection,constructs the spam feature vector according to Vector Space Model,and uses SVM to spam filtering. 利用改进的信息增益特征选择的方法来提取特征词,基于向量空间模型构造邮件的特征向量,最后用支持向量机算法对邮件进行过滤。
- It outperforms much better than the other two in that it calculates and maximizes the feature vector distance between multi-modal clusters in a hyper-sphere space. 该方法能计算并最大化高维空间中的多模式聚集特征向量距离，由于具有满足三角不等式和非奇性的特性，相对于其他两种方法，它提高了检测性能。
- The traditional VSM(Vector Space Model) system often selects words as the feature,and one of its shortness is the lack of semantic information in document representation. 传统的向量空间过滤模型通常是提取字、词、短语等作为特征项,这样做的缺点是没有考虑文本的语义信息。
- The new method of document feature extraction is also used to solve the problem that the dimention of the keyword vector space is too high with increasing of keywords in document. 使用新的文档特征抽取方法还解决了由于文档关键字过多而导致文档特征向量的维数过高的问题。
- The establishment of fault feature vector is a precondition to fault diagnosis. 电机故障特征相量的确立是进行故障诊断的前提。
- This scheme merges the advantages of the two knowledge systems and takes effects in multi feature syncretic. 该方案在一定程度上融合了两者的优越性，克服了各自的缺陷，在多特徵量融合上也起到了一定的作用。
- The Derivative of a Map between Vector Spaces. 向量空间之间映射的微分。
- Compared to approaches based on vector space model,the calculation of the LZ complexity similarity between email documents requires neither text preprocessing nor feature extraction. 相比基于向量空间模型的邮件识别,邮件文本间的LZ复杂性相似度计算无需对文本进行预处理和特征提取。
- We have discussed sum for subspace of vector space, and cannot popularize sum of subspace to infinitude. 摘要对向量空间的子空间的和的概念不能推广到无限多个子空间的情形进行了讨论。
- In view of the luminance and the chrominance of the image, the class feature vector is extracted. 该算法利用彩色图像的亮度和色度进行分类特征矢量的选择。
- One speaker identification system by extracting MFCC as feature vector and using VQ in match phase is constructed. 只要矢量量化聚类法码本大小选择合适,该说话人识别系统就可以获得较好的识别效果。
- Based on the above,the algorithm can use the additivity of set feature vector to cluster data just by scan... 在此基础上,利用集合特征向量加法法则运算,只需扫描一次信息表就可实现对数据对象的聚类划分。实验结果表明该算法是有效可行的。
- Compared with the vector space model, the probability model is more effective on describing a users interests. 对比实验表明,概率模型比矢量空间模型更好地表达了用户的兴趣和变化。
- For example, 13 means concatenation of first-order gradient and norm luminance as feature vector. 比如：13意味着第一顺序梯度和常规亮度在特征向量上的组合。
- Open Bookmark uses the vector space method and social filtering to get useful information for the users. OpenBookm ark使用向量空间法和社会过滤两种信息过滤方式帮助用户获取有用信息。
- Mathematicianstalk about axioms, integrals, and vector spaces. 数学家谈论的是公理、积分和向量空间。
- There are many different types of abstract space in mathematics, for examples, vector space, inner product space, etc. 数学上存在各种不同的抽象空间，例如向量空间，内积空间等。
- Colligating AR parameter model coefficient and Wavelet packet decomposition energy feature,we get feature vector of battlefield sound-target. 综合AR参数模型系数和小波包分解能量特征,获得战场声目标特征矢量。
- A new hybrid evolutionary LSF codebook optimization algorithm is proposed based on the vector space stretching. 本文提出了一种新型的基于对LSF矢量空间进行拉伸变化的混合进化码书优化算法。
- Using the subimage of an unknown target as feature vector and minimum distance rule for target recognition, experiments on simulated data are done. 对未知目标,以其子像对库矢量的欧氏距离最小为分类准则,进行了识别模拟实验。
