At the beginning of question , this paper , in virtue of plentiful literature information and on the basis of scholar research and in the theory of application for city geography , economical geography , regional economics and via autocad2000 spss 10 . 0 , urms software etc , have made a accidence study on cities and towns system of lanzhou municipal loop 论文从现状问题出发，在查阅大量的文献资料和前人研究的基础上，应用城市地理、经济地理、区域经济学等相关学科的理论与方法，部分研究辅助于autocad2000 、 spss10 . 0和urms等软件，对兰州都市圈城镇体系开展了调查分析和综合研究。
The latter is the emphasis of this article . its hard core is the accidence analysis builder grammar _ lexer . mll and the syntax analysis builder grammarjpaser . mly . it transforms the fortran character string in the program , which would be processed automatic differentiation transform , into data stream of diversified syntax units 词法分析和语法分析部分又分为输入命令数据流以及fortran源程序数据流的词法分析和语法分析，后一部分是本文分析的重点，它以词法分析程序生成器grammarlexer . mll和语法分析程序生成器grammarpaser . mly为核心，将进行自动微分变换的fortran源代码字符串变换成各类语法单位的数据流。
In the system of pre - warning management on the medium and high railway locomotives , the research on the independence , relativity and sensitivity of a variety of specific indexes as well as their interactions and links each other , and the relations between the external crisis of the medium and high speed locomotives and internal traffic accidences , their how to behave and how extent reached by them needs still to research and explore in more deep going and more broad 由于受学识和条件的限制，本课题的研究还是一个较为粗糙的理论框架，中高速铁路机车运行预警管理指标体系中，各具体指标的独立性、相关性与敏感性的研讨及其交互耦合作用及相互联度。中高速铁路机车外因型风险如何转化为中高速铁路机车运行的内部交通风险，如何表现出来，其程度有多大等，有待于继续深入研究和探讨。
The ictclas ( chinese accidence analysis system ) developped by institute of computation technology of china academy of science is used to implement chinese automatic word segmentation and tagging . the algorithm of data mining is used to extract meaningful features that represent the main characteristics of the retrieved documents . then , a novel ideal of virtual concept is proposed to organize the extracted features into specific concepts 用中科院计算所的ictclas汉语词法分析系统实现中文分词及标引，并用数据挖掘算法提取文档特征词条，然后利用本文提出的虚拟概念的思想，将所有特征词条组织成更有意义的概念，最后，根据概念间的继承关系，建立领域自适应概念层次结构，实现了本体论的自动构造。
The paper in this paper makes numerical computation based on operation conditions , which allows operation staff to really reduce accidences judging by the radical rule and then improve economic and safety in boiler ' s operation , to get a good idea of the temperature varying regulation of spiral finned tubes as well 本文根据电厂的实际运行情况进行数值计算的。计算结果可供运行人员在实际工作中参考，减少生产事故发生率、提高电站锅炉运行的经济性和安全性，同时又可了解壁温的变化规律。
