大型数据库交叉型数据鲁棒性挖掘模型仿真

在大型流媒体数据库数据集中,交叉性数据的鲁棒性挖掘结构建立是实现对数据库差异属性分类和数据访问的基础。传统方法对大型数据库中的交叉性数据的鲁棒性挖掘结构建模采用基于遗传算法的数据集聚调度方法,存在较大的路径损耗,数据挖掘的鲁棒性不好。提出改进的基于局部离群点检测遗传进化的大型数据库交叉型数据挖掘模型,构建基于遗传算法的大型流媒体数据库挖掘结构,进行大型流媒体数据库中交叉型数据信息流特征预处理,结合交叉性型数据的离群因子概念,调整流媒体数据调度的位置变换策略,实现交叉性数据的鲁棒性挖掘算法改进。仿真实验结果表明,该算法能有效数据挖掘的a最大匹配率和局部离群点检测性能,保证了数据挖掘的鲁棒性,各项参数指标优于传统方法,展示了较好的应用价值。     

Writing and pseudo‐writing from Internet‐based sources: implications for learning and assessment

In recent years, plagiarism has been on the increase across the Western world. This article identifies Internet access as a contributory cause of this trend and addresses the implications of readily available Internet sources for the teaching and assessment of writing in schools. The basis for the article is a previous study showing a wide incidence of plagiarism in the Internet‐based writing of students in three classes at upper secondary school level in Norway. I relate the students' choices to writing as a cognitive process and as a cultural practice. My basic assumption is that the students' writing is work. It is this work we have in mind when we relate writing to learning and when we assess students' skills on the basis of their written texts. Access to the Internet changes the premises for this work because writing can be replaced by ‘pseudo‐writing’. ‘Pseudo‐writing’ is a work reducing writing practice, which neither excludes nor coincides with what we traditionally associate with plagiarism in schools. The main point in this article is that when students have access to the Internet during essay writing, the result is unavoidably a product of both writing and pseudo‐writing. Internet access thus leads to greater uncertainty about the role writing plays in student learning and makes it more difficult to take written assignments into account in assessing students' school results and effort.     

差错能成为创新之源吗——基于差错管理文化对员工创造力影响的跨层次分析

在面临社会经济转型的关键时期,如何有效激发员工的创造力已成为我国现阶段企业中人力资源管理者的重要课题。以问卷调查的方式获取了安徽省境内43家企业531名员工的有效数据,构建了组织层面的差错管理文化对个体层面员工创造力和创造力自我效能感影响的跨层次中介效应模型,并运用多层线性模型技术对其进行了深入的分析。研究结果表明:组织差错管理文化对员工创造力产生正向的跨层次影响,且创造力自我效能感在组织差错管理文化和员工创造力之间起到部分中介作用。     

成形磨齿表面粗糙度分析及实验研究

表面粗糙度是用来评价一个加工后的零件的几何精度的标准,影响表面粗糙度的因素很多,其中包括砂轮的表面特性、形貌、磨削工艺参数等。通过磨削工艺实验并对数据分析找出表面粗糙度的影响因素及其变化规律,这样能够更好地找出使粗糙度变低的磨削参数以及砂轮的修整参数,所得出的参数能够为降低粗糙度提供更为充足的数学依据。     

Using game‐based learning to support struggling readers at home

Significant numbers of children (6% of 11‐year‐olds) have difficulties learning to read. Meanwhile, children who receive appropriate support from their parents do better in literacy than those who do not. This study uses a case study approach to investigate how digital games designed to support struggling readers in school were used at home, by the parents of six children to support their children’s literacy. Mostly, the children enjoyed playing the games and believe that it helped improve their reading. The parents all valued the opportunity to participate in their child’s learning and believe that the games’ approach to learning is effective. The study considers key influences on the successful use of games to support struggling readers (repetition, feedback, motivation, self‐efficacy, parental beliefs) and raises questions, further consideration of which might usefully inform the future development of effective game‐based learning.     

Using the multimodal affordances of the interactive whiteboard to support students’ understanding of texts

The purpose of the study reported on here was to explore ways in which the interactive whiteboard (IWB) can support students’ understanding of texts. A Year 3 and a Year 4 primary school class in New South Wales, Australia, is the focus of the research. A qualitative case study was carried out using multimodal analysis focusing on the use of an e‐book displayed via the IWB. The results of the study indicate that the IWB can support students’ understanding of a narrative to prepare them to write a whole‐class response through providing increased access to a range of resources that are multimodal in nature. The way the interactive features of the IWB can facilitate access to multimodal resources to cater for student needs is also discussed.     

经管类跨专业综合实训课程初探与实践

随着高职院校实践教学改革的不断深入,改变传统、单一专业的实训方式,建立仿真社会经济环境下的经管类跨专业综合实训平台成为当前实践教学必然方式。结合我院经管类跨专业实训课程平台建设、课程设计与实践,分析了课程实施过程中存在的不足,进行教学反思,提出改善方案。