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Co-training is a semi-supervised learning method, which employs two complementary learners to label the unlabeled data for each other and to predict the test sample together. Previous studies show that redundant information can help improve the ratio of prediction accuracy between semi-supervised learning methods and supervised learning methods. However, redundant information often practically hurts the performance of learning machines. This paper investigates what redundant features have effect on the semi-supervised learning methods, e.g. co-training, and how to remove the redundant features as well as the irrelevant features. Here, FESCOT （feature selection for co-training） is proposed to improve the generalization performance of co-training with feature selection. Experimental results on artificial and real world data sets show that FESCOT helps to remove irrelevant and redundant features that hurt the performance of the co-training method. 相似文献
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A clustering algorithm based selective neural networks ensemble （CLUSEN） is proposed to predict the degree of malignancy in brain glioma. Since the degree prediction of malignancy is critical before brain surgery, many learning methods are used like rule induction algorithm, single neural networks, support vector machines, etc. Ensemble learning methods can improve the generalization of single learning machine, and are becoming popular in the machine learning and medical data processing communities. The procedure of CLUSEN can efficiently remove redundancy learning individuals and help improve the diversity of ensemble methods. CLUSEN is used to predict the degree of malignancy in brain glioma. Experimental results on a set of brain glioma data show that, compared to support vector machines, rule induction and single neural networks, the classification accuracy of CLUSEN is higher. 相似文献
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1 Introduction The degree of malignancy in brain glioma[1]domi-nates the way of treatment .In case of gradeⅠorⅡaccording to Kernohan,the success rate of operationis satisfactory. Otherwise ,for gradeⅢor IV,the sur-gical risk is high ,and poor life qual… 相似文献
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着重介绍了软土的工程特性及高速公路软土地基的稳定性要求,时外软土地基处理技术的常用方法、适用条件进行了分析和讨论,这在公路建设中保证工程质量,取得预期的经济效益和社会效益,具有重大的实际意义. 相似文献
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人格双性化是指一个人身上同时具有男性和女性的人格特征。国外心理学界对人格双性化现象研究已经有三十多年的历史,并取得了丰富的研究成果。然而随着中性化风潮在我国的盛行,新一轮的人格双性化的研究热潮开始在我国兴起。荣格的原型理论认为,人类天生具有双性化的生理和心理特点,双性化是人格发展的最高阶段。荣格的原型理论对我们解释中性化风潮盛行的原因及正确认识中性化现象具有重要意义。 相似文献
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每年发布一次的大学排行榜一直处于大众关注的中心。为了探讨大学排行中存在的一些基本问题,笔者从国内外大学排名的现状入手,分析了我国大学排名中存在的几点问题,并提出了一些改进意见和建议。 相似文献
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＂两型社会＂的建设,离不开与之相适应的生活方式。本研究选取长株潭三市部分城镇居民,对其生活方式进行问卷调查,分析当前长株潭居民不良生活方式的现状,并对其不良生活方式形成的原因进行探析。 相似文献
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