Several Deduced Definitions of Adjacency Matrix;
本文用定义的方式对相邻矩阵的概念在平行边和自回路两个方向作了 推广，最终建立了对称矩阵和无向图之间的一一对应关系。
In recent years,Rail Transit lines in Shanghai have been built in dense forma- tion with mutual crossing one another for two networks or more,thence the problem of protective measures for running section already in operation impacted by the pit excavation of adjacent operational metro lines has been placed on agenda.
地铁运营,对轨道变形(横向和纵向相对弯曲、曲率半径等)有严格的要求,本文以地铁7号线常熟路站南端头井施工对已运营地铁区间隧道保护为例,对相邻已运营的地铁区间隧道保护技术进行分析研究,为今后相类似的工程提供经验。
The paper introduces the geological condition and working surface situation of Du'erping mine, points out the problems existing in re-mining, analyses the condition of lower wall rock stress of mine column, and presents the mining measures of over mine column of adjacent coal bed.
介绍了杜儿坪矿的地质条件、工作面情况,指出了回采中遇到的问题,分析了煤柱下围岩应力的情况,提出相邻煤层过煤柱开采的措施。