校园网建设的策略及原则

该文针对目前各级各类学校建设校园网风靡全国的现状 ,提出了基于Internet的校园网建设的教育目的、策略、流程图 ,并进一步分析、总结、提出设计建设校园网的教育性原则及其他原则     

基于社会资本理论的大学生社交媒体多任务使用效果研究

在使用社交媒体的人群中,大学生群体对社交媒体的多任务使用与其学业成绩之间有着怎样的内在关联属性,对其社会资本的积累产生怎样的影响是本文的研究问题所在。对研究问题的原因进行探索性分析,研究发现,出于学习或娱乐目的的社交媒体多任务使用对大学生的学业成绩呈现负相关,不利于其学业成绩的提高,阻碍学习进程健康、科学开展,不利于其社会资本的正向积累。     

物理化学教学中体现的科学研究规律和方法

科学研究的一般规律和方法是具有创新能力人才所必须掌握的。文章介绍了物理化学教学过程中所体现出来的科学研究的一般规律和方法。     

Co-benefit of hazardous trace elements capture in dust removal devices of ultra-low emission coal-fired power plants

The co-benefit of hazardous trace elements such as mercury (Hg), arsenic (As), and selenium (Se) capture in dust removal devices of ultra-low emission coal-fired power plants was investigated. Feed fuel and ash samples collected from 15 different coal-fired power units equipped with ultra-low emission systems were characterized to determine the concentrations and distribution characteristics of trace elements. It was found that the low-low temperature electrostatic precipitator (LLT-ESP) and the electrostatic fabric filter (EFF) had greater abatement capacity for Hg than normal cold-side ESP (CS-ESP). Only 0.8%–36.1% of Hg escaped from LLT-ESP and EFF, whereas 42.1%–90.6% of Hg escaped from CS-ESP. With the employment of EFF and ESP (inlet temperature<125 °C), 72.3%–99.1% of As and 70.7%–100% of Se could be captured before the wet flue gas desulfurization (WFGD) system. The significance level of the effects on the abatement capacity for Hg, As, and Se in ESP were analyzed by the Pearson correlation analysis and grey relational analysis. The results indicated that the low inlet temperature of LLT-ESP had significant promotional effect on the simultaneous removal of Hg, As, and Se. The smaller particle size of fly ash can be conducive to the adsorption of hazardous trace elements. The inhibitory effect of sulfur content in coal was significant for the enrichment of Hg and Se in fly ash.     

基于组织变革的中小学校长培训及其关系处理研究

校长培训组织应该依据社会与教育发展所引起的培训环境的变化，及时调整和完善自身结构和功能，以满足校长培训发展的新需要，这是一种新的搞好“十一五”中小学校长培训工作的组织变革观。文章认为。在实现培训组织变革中，要慎重处理好正规与非正规、现代培训手段与传统培训方式等六大关系。     

国家社科基金项目成果视角下图书情报学研究现状探析

本文基于中国知网数据库,统计了2008-2017年我国图情领域19种核心期刊刊载图情类国家社科基金项目论文的产出情况,对论文数量、年度分布、期刊分布、项目分布、研究机构、著者分布、主题分布等方面进行文献计量分析。研究表明:近十年图情领域国家社科基金项目论文的数量逐年增加,高校是图书情报研究的主要参与者;机构间科研实力悬殊,高产机构和高影响力作者分布存在地区差异;理论研究是基础,方法技术研究成为研究热点。     

国际著名检索系统收录我国高校学报的情况分析及应对策略

通过对美国SCI、Ei、MEDLINE、CA 等4种国际著名检索系统收录评价体系及我国高校学报被这4种国际著名检索系统收录情况的分析,认为我国高校学报应从提高学术质量、提升刊物的国际化程度、强化期刊的编排出版规范、缩短出版周期、注意英文写作规范、重视引文分析数据、加强对国际检索机构进行有针对性的宣传并与之动态联系等几方面入手,方能提高被国际著名检索系统收录的可能性.     

实施生物实验改革提高学生综合素质

本文详细地论述了在初等教育专业教学中进行生物实验教学改革的具体方法,即加强基础实验训练,提高学生从师能力;增加探究性实验,适应基础教育改革;开设自选实验项目,加强学生综合素质的培养等方法.并对实验改革的结果和意义进行了总结和讨论:通过对生物实验进行适当改革,可以提高师范生综合素质.     

Application of response surface methodology in medium optimization for pyruvic acid production of <Emphasis Type="Italic">Torulopsis glabrata</Emphasis> TP19 in batch fermentation

Response surface methodology （RSM） was used to optimize the fermentation medium for enhancing pyruvic acid production by Torulopsis glabrata TP19. In the first step of optimization, with Plackett-Burman design, ammonium sulfate, glucose and nicotinic acid were found to be the important factors affecting pyruvic acid production significantly. In the second step, a 23 full factorial central composite design and RSM were applied to determine the optimal concentration of each significant variable. A second-order polynomial was determined by the multiple regression analysis of the experimental data. The optimum values for the critical components were obtained as follows： ammonium sulfate 0.7498 （10.75 g/L）, glucose 0.9383 （109.38 g/L） and nicotinic acid 0.3633 （7.86 mg/L） with a predicted value of maximum pyruvic acid production of 42.2 g/L. Under the optimal conditions, the practical pyruvic acid production was 42.4 g/L. The determination coefficient （R^2） was 0.9483, which ensures adequate credibility of the model. By scaling up fermentation from flask to jar fermentor, we obtained promising results.