信息技术隐性课程对提升信息素养的促进作用

信息化的浪潮在全球范围内风起云涌,使得信息素养已成为每个公民必备的生存能力,如何提升信息素养也日益成为社会各界关注的重要问题。信息技术的隐性课程是相对于显性课程而言的,它对促进信息素养的培育同样有着不可忽视的重要意义。本文在介绍信息素养以及信息技术隐性课程的基础上,阐述了信息技术隐性课程对提升信息素养的促进作用。     

阜阳市农村金融与经济发展关系的实证分析

基于阜阳市2006—2015年的统计数据,通过实地调研,选取农村金融与经济发展的影响因子,实证分析了阜阳市农村金融与经济发展相互促进、相互影响的正相关关系,并从农户、金融机构、政府等不同角度提出了提高农村金融市场的发展效率、促进当地经济发展的建议.     

基于核密度估计多样性采集的背景建模算法

1IntroductionBackground subtraction methods are extensively ex-ploited for moving object detection in videos in manyapplications ,such as traffic monitoring[1],human mo-tion capture[2]and video surveillance[3]. The centralidea behind such methods is to segment foreground ini mage sequences taken from a fixed camera by com-paring each newframe to a model of the scene back-ground . Therefore , correctly and efficiently modelingand updating the background model is one of the mostchallenging aspec…     

高职院校学籍管理参与者信息化素养提升策略探析

学籍管理工作既关系到高职院校人才培养质量的水平,也关系到高职学生的切身利益,需要学生、辅导员与班主任、教务管理人员等学籍管理参与者主动参与,他们的信息化素养水平直接决定参与的成效。本文通过问卷调查,发现某高职院校学籍管理方面存在的问题,并有针对性地提出通过培训提升学籍管理参与者信息素养的策略,以期对高职院校学籍管理培训的发展起到抛砖引玉的作用。     

Metaphor,Transferred Epithet与Personification辨析

本文认为隐喻、移位法与拟人法这三个英语辞格是人类思维中三种性质不同的方式的产物，并分析了其表现形式的不同。     

口腔仿真模拟系统及其在临床前教学中的应用

介绍口腔仿真模拟系统的主要构成以及功能特点。在口腔临床前教学中应用此系统不但能够增强学生的学习积极性、巩固基础理论知识,而且能够提高临床操作技能,值得进一步在口腔教学中推广应用。     

Conversion of CO<Subscript>2</Subscript> to useful substances with composite iron,nickel, and copper catalysts

Composite materials of Fe/Al₂O₃, which consist of small particles of iron supported by thermally stable alumina even at 500–700 °C, have been widely used in the water-gas shift reaction for natural gas reforming. Therefore, Fe/Al₂O₃ is one of the promising candidates for re-transformation of exhausted CO₂ into fuels such as alcohols and hydrocarbons. The development of a CO₂ reforming system using the composite materials of Fe/Al₂O₃ through CO₂ reduction to CO, dissociation of water into hydrogen, and methanol synthesis has been investigated. It was found that dry and steam (i.e. wet) reforming of CO₂ produced almost the same amount of CO. At a temperature above 500 °C, maximal and saturated yields of CO and H₂ from CO₂ and water were obtained. However, this CO₂ reforming system requires higher-pressure conditions from several tens to hundreds standard atmospheric pressure in order to achieve high yield and selectivity for methanol production. In this study we developed the modified CO₂ reforming system by the utilization of Ni and/or Cu instead of Fe in order to obtain other types of useful products such as CO, CH₄, and carbon, more efficiently and selectively under atmospheric pressure. When Ni or Cu was used, conversion of CO₂ was reduced to 76%, while 9% of methane was detected in the case of Ni. On the other hand, though the CO₂ conversion reduced half of the Fe, the selectivity of CO from CO₂ increased to 95% in the case of Cu.