基于多最小支持度的挖掘算法研究

数据挖掘是从事务数据库中抽取有用的知识和感兴趣的模式,而从事务数据库中发现关联规则是最常见的挖掘技术之一。提出一个遗传模糊关联规则挖掘框架和综合聚类、模糊和遗传概念的多最小支持度的遗传模糊关联规则挖掘算法。该算法从定量事务数据库中抽取合理的多最小支持度值、隶属函数和模糊关联规则,首先使用k—means聚类算法采集相似项目,然后初始化一个种群设定相同的支持度值,每一个染色体通过需求满足的标准和隶属函数的适应性来评估是否满足其适应度。     

Preliminary tests for mechanical properties of wooden ‘buttons’ used for attaching auxiliary supports behind panel paintings

Abstract

When wooden supports of panel paintings have been severely altered or damaged and the original cross beams are missing, new cross beams or other types of auxiliary supports are connected to the panel's back-face in order to achieve desired effects including panel strengthening and control of deformations. Some conservation laboratories use small wooden blocks, each glued on the back face of the panel and holding freely the head of a screw connected (often by means of springs) to the auxiliary support; such blocks being called in Italian ‘piedini’ or ‘bottoni’, the English term ‘buttons’ is proposed here. This paper reports research aiming to characterize the mechanical behavior of three types of ‘buttons’ having different geometries and made of various wood types (oak, walnut, lime, beech, and a medium density fiberboard). Short-term mechanical tests (～1 minute duration) were performed with a universal testing machine by axially pulling out the 4 mm diameter steel screw from the button, glued onto a dummy board. Load and deformation were recorded, and the load–deformation curves were analyzed. The results show that the deformability and the load-carrying capacity of the buttons were influenced primarily by the manufacturing geometry and secondarily by the wood density.     

Element-free Galerkin method for free vibration of rectangular plates with interior elastic point supports and elastically restrained edges

The element-free Galerkin method is proposed to solve free vibration of rectangular plates with finite interior elastic point supports and elastically restrained edges.Based on the extended Hamilton＇s principle for the elastic dynamics system,the dimensionless equations of motion of rectangular plates with finite interior elastic point supports and the edge elastically restrained are established using the element-free Galerkin method.Through numerical calculation,curves of the natural frequency of thin plates with three edges simply supported and one edge elastically restrained,and three edges clamped and the other edge elastically restrained versus the spring constant,locations of elastic point support and the elastic stiffness of edge elastically restrained are obtained.Effects of elastic point supports and edge elastically restrained on the free vibration characteristics of the thin plates are analyzed.     

基于知识管理的网络课程设计研究

随着互联网技术的发展,网络课程在现代远程教育中所起的作用日益突出。网络课程与知识管理结合有重要意义,知识管理为网络课程在技术方面提供了有益借鉴。     

文学叙事的道德承载

道德承载是文学叙事的一份社会责任和历史使命。文学叙事的道德承载得到中国和西方的普遍认同和重视。在古今中外文学史上都强调发挥文学陶冶人的情操、开拓人的襟怀、提升人的境界,把人不断引向自我超越的价值和作用。如果文学叙事没有了道德承载,文学就没有了灵魂,没有了寄托,成为轻飘、平淡、无聊的文字游戏和文字符号。     

Communities of practice in inclusive education

The data in this paper represent the experiences and perspectives of parents and teachers who worked as communities of practice, designing support plans for the inclusion of three students with intellectual disabilities in general education classrooms. Their reflections, obtained through interviews and questionnaires, show how they constructed relevant knowledge to support these children with special educational needs in their class. The findings show the potential benefits of partnerships and local knowledge in addressing the educational challenge of inclusion.     

“三支一扶”计划政策梗阻与消解——基于海西高校的实证调查研究

＂三支一扶＂计划一经推出就引发社会各方面的共同关注,并在宏观层面上制定了相应的指导意见,然而在＂三支一扶＂计划实施中,仍存在着认识偏差和政策梗阻,有必要加以澄清和理顺。     

陕西省射击队运动员赛前失眠的相关心理因素及对策研究

参考相关资料,对运动员赛前失眠进行界定,从心理角度的不同方面分析总结影响运动员赛前失眠的心理因素。针对原因提出各种积极有效的调整措施,对改善赛前失眠群体的失眠症状,提高睡眠质量提供一定的辅助和参考,为运动员在比赛中取得优异成绩储备必需的心理能量。     

运动员伤病期间的自信重建及其影响因素

采用运动中任务和自我定向问卷(SSQ)、运动自信来源问卷(M-SSCQ)和状态运动自信问卷(M-SSCI)对39名运动员伤病期间自信重建过程的影响因素进行了调查,结果发现,运动中强调任务定向倾向有效地预测了策略的选择,在伤病期间自信多来源于自我参考,而在伤病初期感受到更多社会支持的运动员更可能依靠表现来重建自信.     

财政支农对分组农户收入影响的差异分析

为了分析国家财政支农政策对农民不同群体影响的差异,文章运用2002—2012年财政支农数据,建立财政支农对五等份分农村居民收入的面板数据回归模型,研究发现,财政支农对农民收入的增长效应要强于国民经济增长水平,平均每户整、半劳动力和平均每个劳动力负担人口对农民收入增长影响为负效应,财政支农对五等份分农村居民收入影响由中等收入群体向两极收入群体递减,但五等份分农户个体效应限制了低收入居民的收入增长能力。因此,加大财政支农力度不仅可以提高农户的收入水平,而且可以缩小农村内部差距,同时应注意政策对不同群体影响的差异,要建立专门针对农村20%低收入群体的脱贫攻坚政策。