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以竞争市场环境中的产品在线评论数据为研究对象,基于支持产品设计改进的视角,采用数据挖掘的方法与工具,开展面向产品设计改进的在线评论大数据分析研究。重点开展在线评论数据挖掘过程模型中的有用性建模和特征评价值情感分析。以某智能手机产品的在线评论数据为对象进行了实验,得到该产品各个属性的评价值,与更新换代后的产品属性进行比较,验证了此方法的有效性。 相似文献
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针对有监督评论有用性预测方法中的训练数据集难以构造,以及无监督方法缺乏对情感信息支撑的问题,提出基于语义和情感信息构建一种无监督模型,用于对评论有用性进行预测,同时考虑了评论和评论下回复内容对观点的支持度用来计算观点的有用性得分,进而得到评论的有用性。同时,提出结合句法分析和改进潜在狄利克雷分配(LDA)模型的评论摘要方法用于评论有用性预测模型中的观点提取,基于句法分析结果构建must-link和cannot-link两种约束条件指导主题模型学习,在保证召回率的同时提高模型准确率。该方法在实验数据集上能取得70%左右的F1值和90%左右的排序准确率,且实例应用也表明该方法对结果具有较好的解释性。 相似文献
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在线评论的有用性预测任务在当前的电子商务领域中发挥着重要的作用, 该任务的目标是判断在线评论的有用性, 进而重点展示对未来消费者更有帮助的评论, 提高消费者获取信息的效率. 在本文中, 我们重点关注近年来在各大在线平台兴起的一种新的评分系统——多维评分系统, 尝试研究用户在该系统中给出的方面评分对在线评论有用性的影响. 本文提出了一个综合考虑了评论文本、用户总体评分和方面评分3种元素及其交互的多层次神经网络模型HORA来完成有用性预测任务. 通过在两个真实世界的数据集上进行的实验结果表明, 与当前的基线模型相比, HORA在MAE和RMSE两个指标上展示了更好的结果, 同时在实验中也表现出了良好的鲁棒性, 表明了方面评分对用户的在线评论有用性感知的重要意义. 相似文献
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近些年来,随着电商平台的飞速发展,越来越多的人会选择在网上购物并且对商品进行评价。对于较长篇幅的评论,进行摘要可以让用户快速地了解到商品的优缺点。目前主流的生成式摘要模型大多只考虑文本的序列化信息,而对一个商品评论来说,评论中的商品属性信息和情感信息极为重要。为了让模型学习到评论中的商品属性及情感信息,该文提出了一种融合评论中属性及情感信息的生成式摘要方法。该方法通过将不同种类的情感和属性信息嵌入生成模型的编码阶段的方式,从而有效的结合这些信息。实验证明,该方法可生成更高质量的摘要,生成的摘要在ROUGE评价指标上会有较大幅度的提升。 相似文献
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汽油属性的在线预测多采用无偏估计方法建立的近红外定量分析模型实现,累积预测误差的正负偏差范围难以控制,这会严重影响汽油调合优化控制的投运效果.针对这一问题,本文提出了一种采用有偏估计实现油品属性在线预测的方法.首先从最小最大概率学习机出发,提出了有偏最小最大概率回归模型.然后利用即时学习方法设计了有偏回归模型的局部建模与更新策略,用以提高回归模型的自适应能力.最后在国内某炼厂汽油调合过程中采集的工业数据上进行实验,结果表明该方法与传统方法相比具有明显优势,有利于大幅度提高调合优化控制的投运率. 相似文献
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提出了一种基于随机网络的在线评论情绪倾向性分类模型SCP-X (Shortest covering path-X). 首先引入了一种增量式创建词语顺序共现随机网络的方法, 并基于此随机网络以及情绪词表, 提出了一种基于评论序列最短覆盖路径(Shortest covering path, SCP)的情绪倾向性分类方法. 该方法具有以下两个优点: 1)能够对相对短小、随意性 较强、完整性较差的评论文本展开词语联想, 从而对完整性较差的评论数据进行属性值扩展; 2) 能够对评论文本的冗余属性进行约简, 约简后数据的属性规模为一般VSM模型 的10%左右. 本文最后设计了一组实验, 对以下算法进行了对比测试: TC, SVM, SCP-TC, SCP-SVM, SCP-HMM, SCP-Bayes. 结果表明本文提出的SCP-X方法对在线评论文本的倾向性分类效果更佳. 相似文献
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S. Shaw 《Journal of Computer Assisted Learning》1993,9(2):93-99
Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained. 相似文献
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European Community policy and the market 总被引:1,自引:0,他引:1
C. Lloyd 《Journal of Computer Assisted Learning》1993,9(2):86-91
Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven. 相似文献
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融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。 相似文献
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Wayne O’Brien Author Vitae 《Journal of Systems and Software》2008,81(11):1997-2013
Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them. 相似文献
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This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives. 相似文献
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Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what
is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic
sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and
its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of
an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify
robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can
or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest.
This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January
31–February 2, 2008 相似文献
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张涛 《计算机测量与控制》2015,23(1):86-89
为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值. 相似文献
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Recent years have seen rapid advances in various grid-related technologies, middleware, and applications. The GCC conference has become one of the largest scientific events worldwide in grid and cooperative computing. The 6th international conference on grid and cooperative computing (GCC2007) Sponsored by China Computer Federation (CCF),Institute of Computing Technology, Chinese Academy of Sciences (ICT) and Xinjiang University ,and in Cooperation with IEEE Computer Soceity ,is to be held from August 16 to 18, 2007 in Urumchi, Xinjiang, China. 相似文献
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David Poole 《Computational Intelligence》1989,5(2):97-110
Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given. 相似文献
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《控制理论与应用(英文版)》2014,(3)
正The 34th Chinese Control Conference and SICE Annual Conference 2015(CCCSICE2015)is organized by the Technical Committee on Control Theory(TCCT)of Chinese Association of Automation(CAA)and the Society of Instrument and Control Engineers(SICE)of Japan,and locally organized by Hangzhou Dianzi University(HDU). 相似文献