CNMARC客观照录的利弊

文章根据CALLS联机编目著录细则的规定,以实际例子探讨了CNMAILC有关客观照录的利弊,指出了客观照录需要改进之处。     

论图书信息的组织与其编目格式的利用

随着网络环境的发展,书目信息控制有了突破性的进展,特别是中国高等教育文献保障体系(CALIS)推广和普及更使图书信息的揭示趋于系统化和科学化,其深远的意义不仅仅是减轻了编目人员的工作强度,避免图书积压现象,而是为最终实现资源共享创造先决条件。但是,在实际工作中,由于图书馆馆类型和收藏图书的方向不同,以及对CALIS掌握使用的程度,编目人员的业务素质等因素的影响,图书信息揭示的完整和准确性还有待进一步的商榷。本文从图书所包含的信息内容出发,阐述其必要的编目格式的著录,使资源利用真正做到共享,抛砖引玉,促进我国编目研究的发展。     

普通专著在CNMARC著录中的对应关系

普通专著在CNMARC著录中有许多对应关系。了解这些对应关系,可大大提高编目速度和编目质量。本文归纳出三种对应关系．并以实例详细阐述。     

关于CNMARC检索点及其著录的探讨

针对CNMARC格式著录的复杂情况,论述了当前图书馆使用的CNMARC格式中具有检索意义的字段的著录技巧和方法。     

Process-based approach to automated classification of forest structures using medium format digital aerial photos and ancillary GIS information

The methods of forest inventory data acquisition, based on the analysis of remotely sensed images have been well tested and implemented during the last decade. The predominant visual interpretation and pixel-based automated techniques are now being gradually replaced by the object-based image classification at multiple levels. This paper describes an experiment using medium-format digital aerial imagery for the purpose of automated updating of the existing GIS forest management database (LHPO). The method emphasises the pre-processing phase, where various image transforms and additional channels i.e. spectral ratios and vegetation indices (NDVI), low-pass filters, Sobel edge and GLCM (grey level co-occurrence matrix) texture measures are derived from the original dataset. The layer stack is then transferred into the object-oriented classification environment together with the existing thematic vector layer, and analysed on three hierarchical object levels. The classification involves the recognition of the successional stage of forest compartments and the estimation of tree species composition in terms of area coverage. In addition, age information on the GIS forestry management map can be updated and the spatial distribution of classes corrected using the multi-scale object relations of the former analysis. The advances of the automated procedure based on sequential processing of image objects are partially covered. Moreover, aspects of utilisation of the medium-format colour infra-red images (CIR) as an alternative to traditional aerial photos and very high resolution (VHR) satellite data, were considered.     

基础医学核心期刊摘要结构和内容调查

通过调查中美基础医学类核心期刊稿约对论文摘要结构、内容的要求，了解基础医学类摘要结构的现状和摘要的必要内容。得出我国基础医学类核心期刊绝大部分采用四项结构式摘要，稿约中涉及摘要内容少、粗。美国基础医学类核心期刊摘要以非结构式为主，规定的摘要内容详细、较有层次。     

柿(Diospyros kaki L.) AFLP标记连锁图谱的构建

以甜柿禅寺丸和涩柿磨盘柿杂交,用获得的F1代分离群体的96个单株为实验材料,以AFLP标记尝试构建柿属植物的AFLP分子标记连锁图谱。先用2个亲本筛选引物,从256对AFLP引物组合中筛选得到了27对多态性好的引物。用筛选得到的27对引物对2个亲本及其F1群体进行AFLP分析,共得到多态性标记447个,其中符合孟德尔定律的标记有400个,占总多态性标记的89.5%。符合1∶1分离比率的多态性标记共有300个,在禅寺丸中得到147个,在磨盘柿中得到153个。符合3∶1比率的多态性标记有100个。用Mapmaker 3.0软件和拟测交策略,分别构建了禅寺丸和磨盘柿的分子标记AFLP连锁图谱。禅寺丸的连锁图谱包括24个连锁群,由149个AFLP标记组成,总图距为2 105.5cM,标记间平均距离为14.1cM。磨盘柿的连锁图谱包括22个连锁群,由181个AFLP标记组成,总图距为2 253.8cM,标记间平均距离为12.5cM。     

对CNMARC字段指示符的若干认识和思考

文章结合著录工作实践对CNMARC指示符的赋值问题提出一些看法及建议。     

大批量数据自动移植方案的设计与开发——在不同版本、不同编码格式的Oracle数据库之间

通过在同一进程中灵活变换系统变量NLS_LANG的值,融合数据导入导出技术,从而实现大批量数据的在不同版本、不同编码格式的Oracle数据库之间的自动移植.