Designing a trust evaluation model for open‐knowledge communities

The openness of open‐knowledge communities (OKCs) leads to concerns about the knowledge quality and reliability of such communities. This confidence crisis has become a major factor limiting the healthy development of OKCs. Earlier studies on trust evaluation for Wikipedia considered disadvantages such as inadequate influencing factors and separated the treatment of trustworthiness for users and resources. A new trust evaluation model for OKCs—the two‐way interactive feedback model—is developed in this study. The model has two core components: resource trustworthiness (RT) and user trustworthiness (UT). The model is based on more interaction data, considers the interrelation between RT and UT, and better represents the features of interpersonal trust in reality. Experimental simulation and trial operation for the Learning Cell System, a novel open‐knowledge community developed for ubiquitous learning, show that the model accurately evaluates RT and UT in this example OKC environment.     

大学生纸本文献阅读研究——以山东农业大学为例

以山东农业大学为样本,对大学生纸本文献阅读现状进行问卷调查。统计分析发现,目前纸本文献阅读依然是大学生首选的阅读对象;认为影响纸本文献阅读的因素主要有三个,即文献资源、场所及服务。为此指出高校阅读推广应从这三个方面着手：根据阅读倾向的变化调整藏书结构,减少学术期刊的订购比例;改善环境条件;开展互动式服务。     

蹦床运动发展中的问题及其对策探究

蹦床运动历史悠久,素有“空中芭蕾”的美称。与国外蹦床运动广泛开展相比,中国的蹦床运动虽起步较晚,但发展非常迅速,且近年来成绩骄人。然而蹦床运动在我国的根基却十分薄弱,所以体育工作者应认真研究,制定发展策略,建立长效机制,力求实现中国蹦床的可持续发展。     

地方本科院校生物工程专业复合型人才培养模式的探索与实践

地方本科院校根据市场需求,结合学校总体定位,构建复合型人才培养模式的方案,通过教学条件建设和制度建设,确保方案的顺利实施,提高人才培养质量,培养出适应经济社会发展要求的复合型专业人才。     

The construction of an interfacial valve-based microfluidic chip for thermotaxis evaluation of human sperm

Thermotaxis has been demonstrated to be an important criterion for sperm evaluation, yet clinical assessment of thermotaxis capacity is currently lacking. In this article, the on-chip thermotaxis evaluation of human sperm is presented for the first time using an interfacial valve-facilitated microfluidic device. The temperature gradient was established and accurately controlled by an external temperature gradient control system. The temperature gradient responsive sperm population was enriched into one of the branch channels with higher temperature setting and the non-responsive ones were evenly distributed into the two branch channels. We employed air-liquid interfacial valves to ensure stable isolation of the two branches, facilitating convenient manipulation of the entrapped sperm. With this device, thermotactic responses were observed in 5.7%-10.6% of the motile sperm moving through four temperature ranges (34.0-35.3 °C, 35.0-36.3 °C, 36.0-37.3 °C, and 37.0-38.3 °C, respectively). In conclusion, we have developed a new method for high throughput clinical evaluation of sperm thermotaxis and this method may allow other researchers to derive better IVF procedure.     

基于Sci2的国外经济学知识图谱研究

为发掘出国外经济学领域的研究热点,文章将文献计量学的方法引入经济学领域,借助Histcite对数据进行全面的统计分析,利用知识图谱工具Sci²构建共词网络,将国外经济学的发展情况以可视化的方式展示。文章首先阐述了数据来源的依据,并对知识图谱工具Histcite和Sci²做了简单的介绍;其次对数据概况进行全面的分析;最后,抽取高频关键词进行共词分析,通过共词网络,分析出3年来国外经济学领域的研究前沿。     

实施"科技富民强县"专项构建和谐社会

“科技富民强县”是新时期构建县域和谐社会的紧迫任务和有效途径。本文阐述了“科技富民强县”与建立和谐社会的关系,论述了依靠科技实现县“强”民“富”的内涵,指出“科技富民强县专项行动计划”是一项促进县域经济社会和谐发展的系统工程,提出在实施过程中要以上下联动的组织管理体系和机制创新作为保障。     

论图书馆人际关系的和谐

论述了人际关系、图书馆人际关系的基本概念．对构建和谐的图书馆人际关系做了有益的探索。     

基于链接分析的网站评价研究

从排名前50位的美国商学院中,随机抽取20个,把它们主页所在网站作为研究对象, 以指向网站的网页数和网络影响因子(Web-IF)作为测定核心网站的依据。研究表明:用这两种依据来测定核心网站,所得结果基本一致;Web-IF对评价网站质量和测定核心网站具有重要价值;在计算Web-IF时应以其他网站指向被研究对象的网页数和网站在该时刻可访问到的网页数作为依据;布拉德福定律可能适用于核心网站的研究。表3。参考文献11。     

冰上课教学中学生生理负荷与心理负荷的研究

在冰上课的教学中,我们往往只注重对学生生理负荷承受能力的测定,而忽视了对学生心理负荷的评定,不能全面客观地评价学生.通过二者结合起来对学生进行研究、调控、评价,从而全面反映教学效果,提高冰上课教学效果.