A Knowledge Discovery System with Support for Model Selection and Visualization

The process of knowledge discovery in databases consists of several steps that are iterative and interactive. In each application, to go through this process the user has to exploit different algorithms and their settings that usually yield multiple models. Model selection, that is, the selection of appropriate models or algorithms to achieve such models, requires meta-knowledge of algorithm/model and model performance metrics. Therefore, model selection is usually a difficult task for the user. We believe that simplifying the process of model selection for the user is crucial to the success of real-life knowledge discovery activities. As opposed to most related work that aims to automate model selection, in our view model selection is a semiautomatic process, requiring an effective collaboration between the user and the discovery system. For such a collaboration, our solution is to give the user the ability to try various alternatives and to compare competing models quantitatively by performance metrics, and qualitatively by effective visualization. This paper presents our research on model selection and visualization in the development of a knowledge discovery system called D2MS. The paper addresses the motivation of model selection in knowledge discovery and related work, gives an overview of D2MS, and describes its solution to model selection and visualization. It then presents the usefulness of D2MS model selection in two case studies of discovering medical knowledge in hospital data—on meningitis and stomach cancer—using three data mining methods of decision trees, conceptual clustering, and rule induction.     

京东扶贫3.0时代下设计参与电商路径探索

目的 促进乡村振兴下的电商扶贫发展,探索以设计参与电商进而推动京东品牌扶贫3.0模式的发展路径.方法 以设计参与农村电商扶贫为研究路径,结合京东集团在云计算、人工智能、大数据、区块链等方面深厚的技术积累,充分利用新技术、新业态、新融合,通过销售数据、交易数据、消费者行为、行业竞争等要素的分析,量化需求与市场指向,指导设计介入的方式.结论 在京东品牌扶贫3.0模式下,把握好互联网、大数据、人工智能、设计、电商、品牌等与一二三产业的深度融合,能盘活乡村文化资源、推进扶贫品牌培育、激活乡村内生市场、创新交易方式、帮助企业创收、助推农民增收,引导推动乡村新经济的转型升级,进一步加快乡村振兴战略的跨越式发展.     

客户参与下的服务型制造系统模型

客户参与的产品服务系统是服务型制造的一个显著特征。针对客户参与度对实施服务型制造的企业产品服务系统绩效难以度量的难题,以客户参与度为变量,构建了客户参与度与客户满意度、市场需求和企业利润的模型。通过分析表明：客户参与产品服务系统能在一定条件下提升客户满意度,实现市场需求和企业利润的增长;并可用平衡积分卡理论诠释四者之间相互支撑的逻辑关系,最后算例验证了上述模型和理论分析的科学与有效性。     

Some of these things are not like the others: Examining motivations and political predispositions among political Facebook activity

Political engagement via social media has evolved, and web sites including Facebook continue to be a place for individuals, especially young ones, to engage politically. Because politics on social media is diverse, it makes sense that the reasons for participating in it vary. In addition, because current events information and political news is accessible via social media, the role of attention to traditional news sources in this type of political engagement is debatable. The study takes up the opportunity to address these questions by examining young people’s attention to television, print, and online news, their engagement with four Facebook political activities, and their psychological motivations for using the website politically just prior to the 2012 U.S. Presidential election. The results suggest that the primary motivations for using Facebook politically are not universal, and indeed vary by activity. They revolve around connecting with others socially, sharing information with others, and presenting oneself to others. In addition, attention to offline and online news largely do not matter. The study moves research forward by describing the variety of psychological predispositions some Facebook users bring to their political engagement with the web site, and how these predispositions vary across different Facebook political behavior.     

Join-based算法在Matlab中的实现

Join-based算法是一种著名的空间co-location模式挖掘算法,co-location模式代表的是一组空间特征的子集,它们的实例在空间中频繁的关联。首先描述了Join-based算法的工作原理,然后以挖掘三江并流珍希植物的共生物种问题为例利用matlab进行了程序实现,给出了运行的最优结果。     

城市街道活力的营造

在现代功能主义规划思想的主导下,城市的活力正逐渐丧失,城市街道作为城市重要的公共生活场所,是城市活力的发生容器.因此,建立形态良好的街道空间,营造具有品质的街道氛围,开展丰富的街道生活,能创造出人们渴望的街道活力.进而给城市带来生机和活力,增加城市的魅力.     

基于《城乡规划法》的公众参与制度

关于公众参与,<城乡规划法>提出了规划公开的原则规定,确立将公众的知情权作为基本权利,明确了公众表达意见的方法和途径,强调了按公众意愿进行规划.随着<城乡规划法>的实施,规划师应具备社会沟通能力,加强社会活动组织能力和综合协调能力,以应对公众参与的前置情况.     

环境非政府组织在环境影响评价中的作用探讨

概述了环境非政府组织的涵义、环境非政府组织的专业性优势和公益性优势,进一步分析了公众参与的主体和形式,以及公众在参与环境影响评价过程中存在的局限性,包括公众的环境意识不强、公众不能对项目发布信息进行有效加工、公众在参与环境影响评价决策过程中缺乏影响力。结合环境非政府组织的优势得出环境非政府组织在公众参与中可以发挥积极作用,主要为沟通桥梁作用、为普通公众提供技术信息支持、教育宣传作用、增强公众的影响力、后续监督作用。     

武汉城市空间特色公众意向调查研究

该文通过对武汉城市空间特色公众认知调查结果的统计分析,从公众对武汉城市空间特色的认知、对城市空间特色各影响要素的评价以及对城市未来发展方向的期望等三个方面,探讨了武汉城市空间特色的公众意向,并在此基础上提出了武汉城市空间特色塑造的方法和建议。