项目名称: 基于最大间隔的多示例学习算法设计与分析
项目编号: No.61202270
项目类型: 青年科学基金项目
立项/批准年度: 2013
项目学科: 计算机科学学科
项目作者: 肖燕珊
作者单位: 广东工业大学
项目金额: 23万元
中文摘要: 多示例学习是机器学习和模式识别中的重要研究领域,本项目拟设计基于支持向量机的最大间隔多示例学习算法,对多示例学习问题进行研究。首先,针对多示例包中歧义性较大的示例,本项目提出基于相似度的多示例分类算法,通过相似度权重把歧义性较大的示例整合到分类器学习中,提高分类边界划分的精确性。其次,对于多示例分类中的知识迁移问题,构建基于分类器的多示例迁移学习算法,通过设计分类器之间的耦合参数,实现相关任务到目标任务的有效知识迁移。再次,在多示例聚类基础上引入成对约束,建立基于成对约束的半监督多示例聚类算法,通过成对约束先验信息的引入来提升多示例聚类性能。最后,设计在特征缺失情况下的多示例排序算法,通过在低维子空间中对排序函数进行重新定义,避免传统填补法中因数据填充不正确而产生的噪音。本项目旨在通过以上问题的解决为多示例学习算法的研究提供思路。
中文关键词: 多示例学习;;;;
英文摘要: Multiple-instance learning is an important research area in machine learning and pattern recognition. In order to cope with the multiple-instance learning problems, this project designs several support vector machine based multiple-instance learning models. Firstly, present a similarity based multiple- instance learning model to incorporate the ambiguous instances into learning the classifier, so that the classification boundary can be refined to be more accurate. Secondly, propose a multiple-instance transfer learning model that transfers the knowledge to the target task from multiple related tasks via auxiliary classifiers. Compared to the multi-task multiple-instance learning methods, transferring the knowledge of related tasks via auxiliary classifiers can improve the training efficiency. Thirdly, put forward a semi-supervised multiple-instance clustering model by introducing the pairwise constraints. Lastly, design a model to handle the absent features in multiple-instance ranking by redefining the ranking functions of instances in lower dimensional spaces. Compared to the traditional missing-data imputation methods, it can avoid the noises caused by the inappropriate imputation.
英文关键词: Multiple-instance learning;;;;