安全情报概念的由来、演进趋势及涵义——来自安全科学学理角度的思辨

[目的/意义]安全问题是当前国家、政府、企业、社会、大众及学界广泛关注的一个重要现实问题，而安全情报是保障安全的必用之宝，故安全情报研究具有十分重要的理论与现实意义。[方法/过程]运用文献分析法和思辨法，从安全科学学理角度出发，论证基于安全科学视角解读与界定安全情报概念的必要性、重要性与紧迫性，探讨安全情报概念的由来与演进趋势，并分析安全情报的涵义。[结果/结论]从安全科学学理角度看，从安全信息到安全情报的安全管理新认识是提出安全情报概念的根本动力，安全情报概念的总体演进趋势是从分散到统一。同时，从系统安全学角度看，安全情报是指所有影响系统安全行为的安全信息。     

数字图书馆信息服务的融合与创新——基于2019年JCDL年会论文的综述

[目的/意义]本文通过对2019年国际数字图书馆联合会议(Joint Conference on Digital Library,JCDL)的录用论文进行整体回顾,梳理了本届年会的最新研究成果与学科发展动态,以助国内图情领域学者更好地了解本届年会成果,把握国际数字图书馆领域研究的前沿热点问题。[研究设计/方法]采用文献综述的方法进行研究。[结论/发现]本届年会更加关注数字图书馆如何通过多源数据的融合、数字人文馆藏资源的利用等实现信息服务深度融合;数字图书馆如何通过海量大数据挖掘与利用、用户行为分析提升其服务水平;如何通过对学术文本资源深入挖掘,实现信息计量学在学术评审、学术评价等方面的创新应用。[创新/价值]本文揭示了国际数字图书馆领域的最新发展态势,展望了未来数字图书馆领域的学术前沿方向。     

Impacts of social economic status on higher education opportunity and graduate employment in China

Based on a nation-wide survey of higher education graduates, this paper analyzes the impact of family background, using paternal occupation and education as indicators, on their scores in the National College Entrance Examination, the level and type of higher education institutions they attend, their employment after graduation, and the income they receive from their first job. It has been found that there are wide disparities among students with different family backgrounds in both access to higher education and their potential employment in China nowadays. This paper also studies how those influences happen. __________ Translated from Peking University Education Review, 2005 July (3)     

Science Letters:Discovery of ultrahigh-T spinel-garnet granulite with pure CO_2 fluid inclusions from the Altay orogenic belt, NW China

We first report discovery of the spinel-garnet-orthopyroxene granulite with pure CO2 fluid inclusions from the Fuyun region of the late Paleozoic Altay orogenic belt in Central Asia, NW China. The rock is characterized by an assemblage of garnet, orthopyroxene, spinel, cordierite, biotite, plagioclase and quartz. Symplectites of orthopyroxene and spinel, and orthopyroxene and cordierite indicate decompression under UHT conditions. Mineral chemistry shows that the or-thopyroxenes have high XMg and A12O3 contents (up to 9.23 wt%). Biotites are enriched in TiO2 and XMg and are stable under granulite facies conditions. The garnet and quartz from the rock carry monophase fluid inclusions which show peak melting temperatures of around -56.7℃, indicating a pure CO2 species being presented during the ultrahigh-T metamorphism in the Altay orogenic belt. The inclusions homogenize into a liquid phase at temperatures around 15.3-23.8℃ translating into CO2 densities of the order of 0.86-0.88 g/cm3. Based on prelim     

Discussion on National Standard GB 6167"Methods for Testing the Performance of Airborne Particle Counter

Classificationofaircleanlinessinanykindofclean roomsandcleanzoneswillbeaccomplishedintermsofconcentrationofairborneparticles .Alightdiscreteair borneparticlecounter (hereafterreferringtoasAPC)isusedtodeterminetheconcentrationofairborneparticlesequaltoandlargerthanthespecifiedsizesatdesignatedsamplinglocation[1,2 ] .Inthepracticalmeasurementofparticleconcentrationincleanrooms,itisfoundthetest ingresultsofparticlenumberinthesameareacountedbydifferentparticlecountersarequitedifferentanduptoanord…     

Polarography

J Heyrovsky’s invention of polarography in which a dropping mercury electrode is used in the electrochemical cell revolutionised electroanalysis, study of electrode kinetics and adsorption studies on mercury electrodes. Polarography has also directly contributed to the development of new and innovative ideas in electrochemical techniques, instrumentation and applications     

固体杂多酸(盐)催化酯化反应研究进展

概述了杂多酸 (盐 )的结构与性质 ,着重介绍了活性炭和二氧化硅负载杂多酸催化剂的制备及在酯化反应中的应用、研究现状与未来的发展方向     

重言管窥

重言源远流长,应用广泛普遍。它结构独特,灵活多样;它短小凝炼,鲜明生动,往往起到画龙点睛的作用。通过重言来构词或构形,是汉语悠久的历史传统,也是具有鲜明民族特色的语汇、语法现象。在文学创作中,重言运用一直被当作主要的语言表现手法之一。重言的意义不仅表现在语言、文学上,而且渗进更广泛、深刻而根本的中国“社会传统”和“心理习惯”之中。它成为一种文化现象,对中国语言及文学、文化的历史、现实与未来产生重要的影响。     

加强未成年人的思想道德教育势在必行

道德是社会生活中调节人与人之间、个人与社会之间相互关系的行为规范总和,它是一个国家文明的象征,最能反映一个国家国民素质的高低.未成年人是祖国的未来,青少年强则国家强,青少年兴则民族兴.而当今的未成年人在现实生活中所表现出来的道德行为不能令人满意,必须加强对青少年的思想道德教育,使祖国的未来健康成长,从而成为社会有用的人才.     

图书馆文献订购经费向开放出版经费转化:目标、挑战与策略

[目的/意义]为图书馆文献订购经费转化为开放出版经费提供基于事实的案例分析和支撑,以期引起科技发展管理机构、科研教育机构、图书馆及学者对开放出版及经费转化趋势的关注,促进科技信息交流传播和图书馆创新发展。[方法/过程]采用扎根理论方法,系统分析当前传统订购模式和开放出版模式并存局面造成的多重挑战,详细调查多种文献订购经费转化为开放出版经费的试验模式并进行对比分析,提出经费转化的必要性、可行性和策略建议。[结果/结论]图书馆订购经费向开放出版经费的转化具有明确的可行性和必要性,建议从建立"抵消模式"、制定经费转化规则和协调机制等多维角度积极推动文献订购经费向开放出版经费的全面转化。