本文目录一览:
- 1、线路什么意思线路
- 2、什么是线路?
- 3、什么叫铁路线路?它由哪几部分构成,有什么作用
- 4、线路是什么意思?
线路什么意思线路
亦作“线路”。 细小狭窄的道路。 宋 苏轼 《汤村开运盐河雨中督役》诗:“线路不容足,又与牛羊争。”
2.门路;途径。 明 孟子若 《英雄成败》第二折:“俺却觅个线路,拜他做了乾爷,不次召入,升做礼部侍郎、平章政事。” 清 王夫之 《读四书大全说·大学·传第六章四》:“《章句》为初学者陷溺已深,寻不著诚意线路,开此一法门,且教他有入处。”
3.电流、运动物体等所经过的路线。 郑观应 《盛世危言·火器》:“新礮膛加长,用药加重,若仍用黑药必逾礮质所受涨力之量,非惟来复线路易蚀,且防炸裂之虞。” 杨朔 《鸭绿江南北》:“他们夜夜在敌人的轰炸下抢修线路维持行车。” 邵燕祥 《我们架设了这条超高压电线》诗:“正是我们这条线路,使灿烂的灯火更加灿烂。
什么是线路?
轻轨线路由地下、地面和高架三种形式,具体采用何种形式,应结合城市总体布局,考虑城市用地、保护环境等因素。
什么叫铁路线路?它由哪几部分构成,有什么作用
铁路线路的定义和作用:铁路线路在路基上铺设轨道,供机车车辆和列车运行的土工构筑物。铁路线路是为了进行铁路运输所修建的固定路线。是铁路固定基础设施的主体。
铁路线路的构成:铁路线路是由路基、桥隧建筑物和轨道组成的一个整体工程。
铁路线路分类:
岔线是指在区间或站内接轨,通向路内外单位的专用线。特别用途线是指安全线和避难线。根据线路意义及其在整个铁路网中的作用,划分为3个等级:
Ⅰ级铁路:保证全国运输联系,具有重要政治、经济、国防意义和在铁路网中起骨干作用的铁路。
远期国家要求的年输送能力800万吨;
Ⅱ级铁路:具有一定的政治、经济、国防意义,在铁路网中起联络、辅助作用的铁路,远期国家要求的年输送能力≥500万吨;
Ⅲ级铁路:为某一地区服务,具有地方意义的铁路,远期国家要求的年输送能力500万吨。
以上内容参考:百度百科-铁路线路
线路是什么意思?
关键线路又称关键路径,为线路上总的工作持续时间最长的路线,即工期最长的路线。一个项目的关键线路可能不止一条,关键线路在 *** 图可用双箭线、粗实线来表示。关键线路主要用于各类项目的计划制定和其进度的监控。
基本信息
中文名
关键线路
外文名
Critical Path
特性
一个项目的关键线路可能不止一条
目录
关键工作
在 *** 计划中,总时差最小的工作称为关键工作。当 *** 计划的计划工期与计算工期相同时,总时差为零的工作为关键工作。
在 *** 计划的实施过程中,关键工作的实际进度提前或拖后,均会对总工期产生影响。因此,关键工作的实际进度是工程进度控制工作的重点。
定义
关键线路也称关键路径。 *** 计划中,自始至终全部由关键工作组成的线路或线路上总的工作持续时间(总工期)最长的路线叫作关键线路。
一个项目中,可能有多于一条的关键线路, *** 图上的关键线路可用双线或粗线标注。
关键线路的确定
当计算出 *** 计划的时间参数后,该 *** 计划的关键线路就十分容易确定,确定 *** 有如下几种:
从 *** 图起点开始到终点为止,工期最长的路线即为关键线路;
将 *** 图起点开始到终点工作总时差为0或为最小值的关键工作串联起来,即为关键线路;
将时差为最小值的节点串联起来,即为关键线路。
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