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该文提出了一种将支持向量机(SVM)与神经网络相结合的方法,得到一种新型的级联型组合分类器.此组合分类器先利用神经网络或SVM对人脸图像进行预分类,得到不同性别的两类人脸图像;然后分别针对其中某一类人脸图像进行K-I。变换以提取有效特征,再使用SVM进行细分,得到最终的识别结果.应用该组合分类器方法在本文整合得到的人脸样本库上进行测试,结果显示该方法不但可以有效地提高识别速度,而且还可以在一定程度上提高识别率,因此方法是有成效和有价值的. 相似文献
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文本分类是信息检索和文本挖掘的关键技术之一。提出了一种基于支持向量数据描述(SVDD)的多类文本分类算法,用支持向量描述训练求得包围各类样本的最小超球体,并使得分类间隔最大化,在测试阶段,引入基于核空间k-近邻平均距离的判别准则,判断样本所属类别。实验结果表明,该方法具有很好的泛化能力和很好的时间性能。 相似文献
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结合江苏省高校科技创新成果转化的现状,构建高校科技成果转化效率评价体系,以江苏省39所本科院校为研究对象,采用分类DEA法,将评价指标的选取和成果转化效率的测算有机结合,分别测算39所江苏省高校、28所其他本科院校的科技成果转化的总体效率。研究表明211高校的科技成果转化效率相对较高,18所非DEA有效的其他本科院校中有11所高校的规模报酬递增。 相似文献
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新的Hopfield神经网络分类器在葡萄酒质量评价中的应用 总被引:1,自引:0,他引:1
建立一种新的Hopfield神经网络分类器模型,该模型通过训练单层前向神经网络来设计,数据兼容性强,可以直接处理来自UCI数据库的葡萄酒的理化性质测试指标数据和专家的感官评价等级数据,实现葡萄酒质量分类。仿真结果表明,该分类器设计简单,耗时短,分类效果明显。 相似文献
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With the arrival of big-data society, methods for classifying real-world problems have attracted much attention for researchers and developers in various fields. In recent years, much effort has been devoted for improving performances of classification algorithms by adding functions or modifying their weaknesses. However, since a large variety of classification algorithms has been available, it is difficult for non-experts to find classification algorithms that achieve good results on a given data set. Therefore, if there is a system which automatically selects the best classification algorithm for a given data set, non-experts would receive various benefits such as saving time and effort. This paper presents a system of predicting the best possible classification algorithm for a given data set with respect to the accuracy. To the best of our knowledge, this is the first approach focused on predicting the best one. The main target users of the proposed system are non-experts who do not have knowledge and experience in data mining. The proposed system utilizes useful meta-features selected from existing recta-features to increase the performance of the prediction. The feature selection is conducted by a wrapper approach with the genetic search algorithm. In the proposed system, K-nearest neighbor algorithm is used to learn the selectedmeta-features and build a classification model for predicting future data. Experiments using 58 real-world data sets show that the proposed system predicted the best classification algorithm with 60.34% accuracy from the top five in 30 classification algorithms. 相似文献
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Boosting算法及其在动态视频图像中的应用 总被引:3,自引:0,他引:3
Boosting是一种有效的分类器组合方法,它用某个分类算法生成一系列的基分类器,每个基分类器的训练依赖于在其之前产生的分类器的分类结果,基分类器在训练集上的错误率用于调整训练样本的概率分布,最终分类器通过单个基分类器的加权投票建立起来。将Boosting算法应用在动态车型图像检测中,大大提高了对运动过程中车辆的识别能力,对智能交通系统的发展起着推动作用。 相似文献