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稀疏标签传播:一种鲁棒的领域适应学习方法 被引量:7
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作者 陶剑文 fu-lai chung +1 位作者 王士同 姚奇富 《软件学报》 EI CSCD 北大核心 2015年第5期977-1000,共24页
稀疏表示因其所具有的鲁棒性,在模式分类领域逐渐得到关注.研究了一种基于稀疏保留模型的新颖领域适应学习方法,并提出一种鲁棒的稀疏标签传播领域适应学习(sparse label propagation domain adaptation learning,简称SLPDAL)算法.SLPDA... 稀疏表示因其所具有的鲁棒性,在模式分类领域逐渐得到关注.研究了一种基于稀疏保留模型的新颖领域适应学习方法,并提出一种鲁棒的稀疏标签传播领域适应学习(sparse label propagation domain adaptation learning,简称SLPDAL)算法.SLPDAL通过将目标领域数据进行稀疏重构,以实现源领域数据标签向目标领域平滑传播.具体来讲,SLPDAL算法分为3步:首先,基于领域间数据分布均值差最小化准则寻求一个优化的核空间,并将领域数据嵌入到该核空间;然后,在该嵌入核空间,基于l1-范最小化准则计算各领域数据的核稀疏重构系数;最后,通过保留领域数据间核稀疏重构系数约束,实现源领域数据标签向目标领域的传播.最后,将SLPDAL算法推广到多核学习框架,提出一个SLPDAL多核学习模型.在鲁棒人脸识别、视频概念检测和文本分类等领域适应学习任务上进行比较实验,所提出的方法取得了优于或可比较的学习性能. 展开更多
关键词 领域适应学习 稀疏表示 标签传播 最大均值差 多核学习
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稀疏近似最近特征空间嵌入标签传播 被引量:3
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作者 陶剑文 fu-lai chung +1 位作者 王士同 姚奇富 《软件学报》 EI CSCD 北大核心 2014年第6期1239-1254,共16页
针对现有的基于图的半监督学习(graph-based semi-supervised learning,简称GSSL)方法存在模型参数敏感和数据空间判别信息不充分等问题,受最近特征空间嵌入和数据稀疏表示思想的启发,提出一种稀疏近似最近特征空间嵌入标签传播算法SANF... 针对现有的基于图的半监督学习(graph-based semi-supervised learning,简称GSSL)方法存在模型参数敏感和数据空间判别信息不充分等问题,受最近特征空间嵌入和数据稀疏表示思想的启发,提出一种稀疏近似最近特征空间嵌入标签传播算法SANFSP(sparse approximated nearest feature space embedding label propagation).SANFSP首先利用特征空间嵌入投影点来稀疏表示原始数据;然后,度量原始数据和稀疏近似最近特征空间嵌入投影间的相似性;进而提出稀疏近似最近特征空间嵌入正则化项;最后,基于传统GSSL方法的标签传播算法,实现数据标签的平滑传播.同时,还将SANFSP算法简单拓展到out-of-sample学习.SANFSP算法在人造和实际数据集(如人脸识别、可视物件识别以及手写数字分类等)上取得了有效的实验结果. 展开更多
关键词 半监督学习 稀疏表示 标签传播 最近特征空间嵌入
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Clustering-Inverse: A Generalized Model for Pattern-Based Time Series Segmentation
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作者 Zhaohong Deng fu-lai chung Shitong Wang 《Journal of Intelligent Learning Systems and Applications》 2011年第1期26-36,共11页
Patterned-based time series segmentation (PTSS) is an important task for many time series data mining applications. In this paper, according to the characteristics of PTSS, a generalized model is proposed for PTSS. Fi... Patterned-based time series segmentation (PTSS) is an important task for many time series data mining applications. In this paper, according to the characteristics of PTSS, a generalized model is proposed for PTSS. First, a new inter-pretation for PTSS is given by comparing this problem with the prototype-based clustering (PC). Then, a novel model, called clustering-inverse model (CI-model), is presented. Finally, two algorithms are presented to implement this model. Our experimental results on artificial and real-world time series demonstrate that the proposed algorithms are quite effective. 展开更多
关键词 Pattern-Based TIME Series Segmentation Clustering-Inverse Dynamic TIME WARPING Perceptually Important POINTS Evolution Computation Particle SWARM Optimization Genetic Algorithm
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Knowledge-driven decision analytics for commercial banking
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作者 K.S.Law fu-lai chung 《Journal of Management Analytics》 EI 2020年第2期209-230,共22页
Although the corporate relationship manager seems to be the key enabler in commercial banking,the personal relationship sales model is not a sustainable model for the paradigm shift in digital financial markets.In thi... Although the corporate relationship manager seems to be the key enabler in commercial banking,the personal relationship sales model is not a sustainable model for the paradigm shift in digital financial markets.In this research,we propose a knowledge-driven decision analytics approach to improve the decision process.However,most of the corporate client documents processed in banks are not well-structured and the traditional analysis approach does not consider the document structure,which carries rich semantic information.We propose a document structure-based text representation approach with incorporating auxiliary information in the predictive analytics of unstructured data to improve the performance in the document classification task.The proposed approach significantly outperforms the traditional whole document approach which does not take into considerations of the document structure.With the proposed approach,knowledge can be effectively and efficiently used for business decisions and planning to improve the competitive advantage and substantiality of banks. 展开更多
关键词 document classification information retrieval informatics document structure analysis auxiliary information
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