免费平等服务是实现全民共享图书馆的重要基础——南京图书馆全面免费开放以来的实践与启示

本文结合南京图书馆全面免费开放以来的实践,探讨公共图书馆作为保障人民基本文化权益的主要途径之一,如何开展免费平等的公益性服务,才能让民众走进图书馆,利用图书馆,真正实现全民共享图书馆.     

浅论出版理念的时代特征

在我国社会主义市场经济体制下,出版理念有两个显著特征一是体现先进文化的前进方向;二是具有宏观视野。具有时代特征的出版理念是一种重要的出版资源。     

概念地图及其结构分析在知识评价中的应用(Ⅲ):实证研究

进行概念地图的结构分析可以在一定程度上有效地评价知识。对概念地图作为知识评价工具的研究框架进行了实证分析;提出了18个概念地图结构分析的测量指标,并验证了这些指标的信度和效度。对概念地图及结构分析在知识评价中应用的实证研究,为进一步利用概念地图全面评价知识奠定了基础。表3。图4。参考文献46。     

书目数据的质量控制

高质量的书目数据库建设是图书馆自动化的基础。本论述了编制书目数据中的质量控制的方法。     

论电视资源的有效整合

本文从电视集团内部资源配置的视角入手,分析电视传媒集团的管理结构中忽视和背离资源整合和资源运作的客观规律的问题,探讨电视传媒产业化进程中资源配置的最优化的途径,并提出具体的改革对策.     

基于双曲等效的双星滑动聚束SAR两步成像算法

双星滑动聚束模式合成孔径雷达(SAR)既保持了双星SAR的灵活性、可靠性和稳定性,同时还可产生高分辨率的图像对,对于观测和测绘具有巨大的潜力.这种模式下需要兼顾双星成像与多普勒带宽显著增加的问题.分析双星滑动聚束SAR系统下目标的多普勒特性,结合双星成像算法与频谱分析法,提出一种基于双曲等效的双星滑动聚束SAR 2步成...     

中外政府数据开放运行机制的实证分析

对当前中外政府数据开放平台的运行方式及保障机制的实证对比研究,有助于我国政府数据开放的建设与发展。本文以各国Data.Gov平台数据为基础,运用实证分析法、统计分析法、比较分析法,从政府数据开放平台的数据层、平台层、管理层3个层面,分析各国政府数据开放的整合与利用机制、开放与协作机制及管理与评估机制的现状。从中得出我国应借鉴国外先进技术与管理经验,加快完成各省、市试点工作,早日建成基于CKAN的国家级Data.gov专业平台建设。     

Two decades of suspect evidence for adaptive molecular evolution—negative selection confounding positive-selection signals

There has been a large literature in the last two decades affirming adaptive DNA sequence evolution between species. The main lines of evidence are from (i) the McDonald-Kreitman (MK) test, which compares divergence and polymorphism data, and (ii) the phylogenetic analysis by maximum likelihood (PAML) test, which analyzes multispecies divergence data. Here, we apply these two tests concurrently to genomic data of Drosophila and Arabidopsis. To our surprise, the >100 genes identified by the two tests do not overlap beyond random expectation. Because the non-concordance could be due to low powers leading to high false negatives, we merge every 20–30 genes into a ‘supergene’. At the supergene level, the power of detection is large but the calls still do not overlap. We rule out methodological reasons for the non-concordance. In particular, extensive simulations fail to find scenarios whereby positive selection can only be detected by either MK or PAML, but not both. Since molecular evolution is governed by positive and negative selection concurrently, a fundamental assumption for estimating one of these (say, positive selection) is that the other is constant. However, in a broad survey of primates, birds, Drosophila and Arabidopsis, we found that negative selection rarely stays constant for long in evolution. As a consequence, the variation in negative selection is often misconstrued as a signal of positive selection. In conclusion, MK, PAML and any method that examines genomic sequence evolution has to explicitly address the variation in negative selection before estimating positive selection. In a companion study, we propose a possible path forward in two stages—first, by mapping out the changes in negative selection and then using this map to estimate positive selection. For now, the large literature on positive selection between species has to await reassessment.     

编译图书主要责任者的选取

文章阐明了编译的含义及第一责任者与主要责任者的区别,并针对编译图书在选择主要责任者时存在的一些问题,结合具体实例,指出应依据图书的实际著作方式,有针对性的选择。     

校园文化与大学发展

校园文化看不见、摸不着,却支撑着大学的脊梁,它潜移默化影响和造就一所大学的文化品格.它不仅对大学发展起着重要作用,也是大学发展的重要内容,是大学建设的题中应有之义.为此,需要建设民主和谐,具有学术自由、人文精神和创新精神的校园文化,并将它提高到学校战略发展的高度来看,以校园文化整合学校发展战略.