新显色剂5-(8-喹啉偶氮)-2,3-二羟基吡啶分光光度法测定微量钴

用作者合成的嘶试剂5-(8-喳啉偶氮)-2,3-二羟基吡啶作显色剂,以分光光度法测定微量钴,在PH9.3的硼砂缓冲溶液中,配合物的最大吸收波长在624nm处,钴量在0～20μg/25ml范围内符合比尔定律,表观摩尔吸光系数为9.0×10~4L·10mol(-1)·cm(-1)。方法简便、快速,应用于维生素B_(12)和镍盐中钴的测定,获得满意结果。     

构建安全的虚拟网

为建设安全高效的企业、虚拟网 .本文综合分析虚拟专用网VPN的隧道协议、用户认证及VPN与防火墙集成的安全问题     

体育教学中应加强情感教育

情感教育是完整教育的基本内容之一 ,它涉及到一个人的心理存在的各个方面 ,是全面提高学生素质 ,更好地实施素质教育的重要内容。从体育教学中如何认识情感教育的基本内容 ;教学中实施情感教育的途径和手段 ;体育教育中情感教育应注意的问题等几方面 ,提出本人的见解     

Studies on some serum enzyme levels in various liver diseases

Serum alkaline phosphatase (ALP) (EC 3.1.3.1), 5′nucleotidase (5′NT) (EC 3.1.3.5), aldolase (ALD) (EC 4.1.2.13) and sorbitol dehydrogenase (SDH) (EC 1.1.1.14) were estimated in infective hepatitis, alcoholic hepatitis, chronic active hepatitis, obstructive jaundice, cirrhosis of liver and amoebic liver abscess. It was observed that serum ALP and 5′NT were significantly increased in all cases of chronic active hepatitis and obstructive hepatic disease. However, the elevation observed in the latter was much higher than the former. Serum SDH and ALD levels were elevated in all cases of infective hepatitis, studied though increase in the former was much higher than the latter, suggesting its significance in the diagnostic confirmation of this disease. Results presented suggest 5′NT and SDH as more reliable diagnostic test compared to ALP and ALD for obstructive jaundice and infective hepatitis respectively.     

美国四年制与五年制教师培养方案比较研究

四年制和五年制教师培养方案是美国教师职前培养的两种主要方式。文章从学制和学位、录取条件、课程设置和培养效果等方面对两种教师教育方案进行了比较分析。中国可以借鉴关国的经验,设置多样化、多层次的教师培养方案,要注意师范教育课程中学术性和专业性课程的均衡以及加强教师培养中对实地经验的重视。     

5G时代图书馆智慧阅读推广服务研究

从5G视角出发阐释智慧阅读的演变优势和服务特点,基于5G+多元智能技术打造智慧阅读空间、阅读游戏开发、智慧阅读营销、阅读资源导航、阅读素养教育的服务体验。为完善5G模式下图书馆智慧阅读的发展格局,论文从维系阅读媒介生态、用户数据的规范与增效、融入情感交互、多样举措融合4个层面对智慧阅读的开展提出参考意见。     

两类学术评价指标比较研究——以影响因子和谷歌学术指标期刊评价为观察视角

[目的/意义]学术评价对整个学术生态系统的发展具有重要意义。以影响因子和谷歌学术指标为视角,跟踪国内外学术评价指标发展的新动态,思考和探索学术评价指标优化发展的可能方向。[方法/过程]分别选取h5指数排名前50的中英文出版物并查询对应影响因子,分析并检验h5指数与影响因子的关系;对比中英文出版物在学科分布、时间范围、"被引"统计标准等方面的异同和优缺点,总结学术评价指标应考虑的诸多因素。从评价主体、评价对象等维度对网络环境下新的学术评价方式进行探索,对Altmetrics、RCR、PubPeer的创新性学术评价实践进行案例分析。[结果/结论]学术评价体系系统而复杂,与学术出版、交流与传播、保存利用等各环节密切关联,科学合理的评价体系应平衡数量与质量、保持客观中立、兼顾内容与形式,应分层次、多维度、全方位进行学术评价。     

Information world mapping: A participatory arts-based elicitation method for information behavior interviews

Participatory, arts-based methods generate rich data with which researchers can explore information behavior in context, and may be particularly apt when engaging with youth or participants with low literacy levels. Information world mapping (IWM) is an innovative and interactive drawing-based interview technique for data elicitation. Initially developed for use in a study of young parents’ health information practices, IWM guides participants in depicting their personal social information worlds, including items, places, and relationships. Maps are then used to facilitate critical incident elicitation of participants' stories about, and interpretations of, their information practices. Within the young parent study, three styles of map were commonly seen: the directional map, the mind map, and the symbolic map. Use of IWM requires time and ethical care, but the method enables researchers to center participants’ own perspectives on information practices, triangulate data obtained via more traditional methods, and enrich understanding of social information worlds.     

TEC-5数字逻辑与计算机组成的实验系统

该文首先介绍了专利产品TEC-5实验系统的特点、配套教材与体系结构，然后总结了实践教学的经验。     

单片机在非稳态法测定不良导体热导热系数中的应用

介绍了在非稳态法测定不良导体导热系统中，使用单片机进行数据采集、解偏微分方程等复杂数据的处理、测试条件的自动控制，导热系数的自动求取，能直接显示待测材料的导热系数。