学科分类方法研究是学科交叉评价的重要环节,为学科交叉测度研究奠定了基础。文章在总结现有的学科分类研究视角和学科分类体系的基础上,基于对《中国图书馆分类法》和国家标准《学科分类与代码》的理解,利用文献分析工具Derwent Data A...学科分类方法研究是学科交叉评价的重要环节,为学科交叉测度研究奠定了基础。文章在总结现有的学科分类研究视角和学科分类体系的基础上,基于对《中国图书馆分类法》和国家标准《学科分类与代码》的理解,利用文献分析工具Derwent Data Analyzer构建了一种基于中图分类号和国家标准学科分类体系之间映射关系的学科分类方法。该学科分类方法可根据文献标记的中图分类号将文献直接划分到国家标准学科体系当中。该方法操作相对简单,以单篇论文作为分类标准较为精确,并且划分的学科目录在国内也具有很强代表性和说服力。展开更多
Based on China National Standard of Soil Engineering Classification (GB/T 50145-2007) and the Unified Soil Classification System of American Society for Testing Materials (ASTM D-2478), two kinds of soil laboratory en...Based on China National Standard of Soil Engineering Classification (GB/T 50145-2007) and the Unified Soil Classification System of American Society for Testing Materials (ASTM D-2478), two kinds of soil laboratory engineering classification methods were discussed and analyzed from the aspects of the definition in particle fraction, classification of soil type and evaluation standard for soil gradation. There is a same limit of fine grains fraction in the two standards, and there are three main types of soil in GB/T 50145-2007 and two in ASTM D-2487. Different evaluation standards of gradation are put forward for gravels and sands in ASTM D-2487. Same criteria of A line, B line and controlling value of plastic index are in the plasticity chart of both standards.展开更多
文摘学科分类方法研究是学科交叉评价的重要环节,为学科交叉测度研究奠定了基础。文章在总结现有的学科分类研究视角和学科分类体系的基础上,基于对《中国图书馆分类法》和国家标准《学科分类与代码》的理解,利用文献分析工具Derwent Data Analyzer构建了一种基于中图分类号和国家标准学科分类体系之间映射关系的学科分类方法。该学科分类方法可根据文献标记的中图分类号将文献直接划分到国家标准学科体系当中。该方法操作相对简单,以单篇论文作为分类标准较为精确,并且划分的学科目录在国内也具有很强代表性和说服力。
基金Supported by Projects of National Natural Science Foundation of China ( Nos. 40902077,41111120084,41172236)
文摘Based on China National Standard of Soil Engineering Classification (GB/T 50145-2007) and the Unified Soil Classification System of American Society for Testing Materials (ASTM D-2478), two kinds of soil laboratory engineering classification methods were discussed and analyzed from the aspects of the definition in particle fraction, classification of soil type and evaluation standard for soil gradation. There is a same limit of fine grains fraction in the two standards, and there are three main types of soil in GB/T 50145-2007 and two in ASTM D-2487. Different evaluation standards of gradation are put forward for gravels and sands in ASTM D-2487. Same criteria of A line, B line and controlling value of plastic index are in the plasticity chart of both standards.
