高校网络群体性事件舆情演化规律初探——基于多项式拟合的定量分析

高校大学生群体由于文化素质高、思维活跃、关心社会、思想不够成熟等,在网络敏感事件的诱使下容易在网络上形成一些过激语言和行动,从而形成一些大规模的高校网络群体性事件,给社会造成了巨大的影响力。因此,有必要清楚地了解各类高校网络群体性事件网络舆情的演化规律,用定量分析的方法进行科学的论证和预测。本文通过搜集5个典型的高校网络群体事件舆情演化的历史数据,建立了基于多项式拟合的舆情演化规律模型,得到了各类高校网络群体性事件舆情演化的具体规律,为科学预测和及时应对高校网络群体性事件起到一定的借鉴作用。     

安徽舟形藻属新资料

 In this paper, a new species, a new variety and a new record for china of Navicu- la from Anhui Province are reported. They are Navicula anhuinsis sp. nov. and N. muticaKütz. var. sinica var. nov.  and N.  mutica var. stigma Patrick.     

高原号春小麦品种的培育与推广

春小麦是甘肃省、青海省及我国北方春麦区的主要粮食作物。西北高原生物研究所培育出22个高原号春小麦品种,这些品种在我国春麦区推广应用后,新增产值约8亿元。本文从高原号春小麦品种在推广应用中产生的社会经济效益角度,阐述了这些品种在解决“三农”问题中发挥的重要作用,介绍了培育、推广高原号春小麦采取的主要措施,并提出了四点建议,以使其发挥更大的作用。     

基于知识链的企业战略知识管理框架

在对“知识链”相关概念分析的基础上，提出企业战略知识管理框架构建所需的知识链模式，并分析以知识链为核心构建框架的原因以及框架内容和各部分关系。     

Ion concentration polarization on paper-based microfluidic devices and its application to preconcentrate dilute sample solutions

Microfluidic paper-based analytical devices (μPADs) are a promising solution for a wide range of point-of-care applications. The feasibility of inducing ion concentration polarization (ICP) on μPADs has thus far attracted little attention. Accordingly, this study commences by demonstrating the ICP phenomenon in a μPAD with a Nafion ion-selective membrane. We are the first to measure the current-voltage curve on a Nafion-coated μPAD in order to indicate that the ion depletion occurs and the ICP is triggered when the current reaches the limiting current. The ICP effect is then exploited to preconcentrate fluorescein on μPADs incorporating straight and convergent channels. By an optimal geometric design, it is shown that the convergent channel results in a greater preconcentration effect than the straight channel. Specifically, a 20-fold enhancement in the sample concentration is achieved after 130 s given an initial concentration of 10^?5 M and an external potential of 50 V. By contrast, the straight channel yields only a 10-fold improvement in the concentration after 180 s. Further, the practical feasibility of the proposed convergent-channel μPAD is demonstrated using fluorescein isothiocyanate labeled bovine serum albumin. The experimental results show that a 15-fold enhancement of the initial sample concentration (10^?5 M) is obtained after 120 s given an external potential of 50 V.     

图书馆网站版权政策现状调查

利用网络对国内115所"211工程"高校图书馆、31所省级公共图书馆、48所中国科学院文献情报中心系统内图书馆、文献信息中心、资料室网站的版权政策进行调查研究,将国内的版权政策内容与国外图书馆相比较,指出国内图书馆版权政策只有少数几所图书馆的体系比较完善,大部分图书馆版权政策只是电子资源公告,还不是真正意义上的版权政策,从整体上来说普遍存在体系不完整,架构不科学,内容不完备,操作性不强等问题。     

高校图书馆微信服务的现状与应对策略

微信服务作为高校图书馆信息服务的新发展方向,在服务形式、信息推送速率、稳定性、使用成本等方面具有一定的优势,其服务内容也比较丰富。本文通过文献分析和网络调研发现,现有的高校图书馆微信服务存在着诸如栏目设置随意、内容创新不足、更新率低、平台功能不完善、宣传推广不足和用户群缺乏稳定性等情况,在此基础上对微信的运营管理、信息与语言组织、平台功能、推送策略、稳定相应用户方面提出了应对策略,以期对高校图书馆开展微信服务提供理论依据与事实参考。     

煤炭类科技期刊集团化管理模式与路径

【目的】 探索煤炭类科技期刊群管理模式与路径。【方法】 针对煤炭科学研究总院所属20种期刊单刊运作模式存在的专业性强、期刊影响力小的弊端,通过集团化管理,在“集中管理、原位运营、名刊直管”运营思路的指导下,积极探索期刊群在质量管理、采编平台建设、集群网站建设、微信平台建设、期刊品牌打造、编辑人才培养方面的管理方法。【结果】 期刊集群化完善期刊质量管控体系,建立中国煤炭期刊网数字出版与服务平台,开通“煤传媒”微信公众服务平台,统一期刊论文采编平台。【结论】 期刊集群化发展对打造精品学术期刊群,实现煤炭类科技期刊的集体繁荣具有重要的促进作用。     

Evaluating R&D investment efficiency in China's high-tech industry

Research and development (R&D) investment activity plays a crucial role in developing high-tech industries. In recent decades, China has made sustained investments in its domestic high-tech industries, with the goal of increasing their productivity. This paper investigates the effect of this investment on relative R&D efficiency across China's high-tech sectors. Data Envelopment Analysis (DEA) was used to generate quantitative indices for sector comparisons. The analysis of this study indicates that overall R&D investment efficiency did not increase from 1998 to 2009, despite R&D expenditure increasing by 2188%. Over the same period, most sectors suffered from decreasing returns to scale (DRS), presumably also reflecting the inefficient R&D investment. Most of the sectors showed significant fluctuation on R&D investment efficiency. This research result indicates that the problem of China's high-tech industry may be from the inefficiency of its technology commercialization processes, and therefore represents a critical parameter for policy makers and managers.     

培养学生创造力的策略

创造力是一种认知、人格和社会层面的综合体。课堂教学中对学生创造力的培养包括认知策略、人格策略和环境策略 ,教师应促进整合并运用于课堂教学实践中