查询词典 crawler

Applying the software ADAMS for dynamic simulation and Pro/E for three-dimensional design creates the mechanical system of virtual prototyping model of the 200t crawler crane. The models of the drag bar, the spring backstop, the luffer rope and the crawler in the system are established well by ADAMS/View module. The dynamic simulation of the complete mechanical system is researched at series of work condition, which occurs possibly the crawler crane boom backward tipping as the crawler crane unloads suddenly.

本文应用虚拟样机技术动力学仿真软件ADAMS，结合三维实体设计软件Pro/E构建了200t履带起重机的虚拟样机机械系统模型，并利用ADAMS/View模块完善了系统中拉板、弹簧式防后倾装置、变幅钢丝绳和履带模型：研究了履带起重机突然卸载时可能发生臂架后倾的一系列工况下，整机机械系统模型的动力学仿真。

The corporation has 350 tons crawler crane, 275 tonnes crawler cranes, crawler crane 150 tons, 50 tons crawler crane, tower crane 100 tons, 80 tons of tower crane, 55-ton crane vehicle, Thin wall Crane, 60 tons of crane and concrete mixing stations, truck, Tanker complete construction machinery and equipment 1495 supporting Taiwan, with a total of 98,000 24208.86KW, technology and equipment reached 66,400 yuan per capita / person.

公司拥有350吨履带式起重机、275吨履带式起重机、150吨履带式起重机、50吨履带式起重机、100吨塔式起重机、80吨塔式起重机、55吨汽车式起重机、FZQ1250附壁式起重机、60吨龙门吊、混凝土搅拌站、泵车、罐车等配套齐全的施工机械设备1495台，总功率为24208.86KW，人均技术装备率达到6.64万元/人。

The bar chart to the right illustrates just how sharply sales of crawler dozers have grown since 2002. For both dozers and loaders, sales fell flat in 2002- by our estimates dropping to approximately 9,450 units of crawler dozers and about 1,200 units of crawler loaders -from peak sales in the late 1990s.

右边的图表清楚地显示了自2002年履带式推土机销量的快速增长情况。2002年推土机和装载机销售没有增长——据我们估计履带式推土机的销量会从九十年代末的顶峰降到大约9450台，履带式装载机会降到约1200台。

The hydraulic system model of the hydraulic cylinder backstop, which in general used on the large-tonnage crawler crane, is established by ADAMS/Hydraulics module. And the joint simulation between the mechanical system and the hydraulic system of the crawler crane virtual prototyping is implemented. The different effect of the spring backstop and hydraulic cylinder backstop for the crawler crane boom backward tipping is analysed and compared.

对目前大吨位履带起重机普遍采用的液压缸式防后倾装置，用ADAMS/Hydraulics模块构建该装置的液压系统模型，实现履带起重机虚拟样机模型机械、液压系统的联合仿真，并分析比较了弹簧式和液压缸式两种防后倾装置对臂架后倾的影响。

Building on this crawler, we developed a rule-based crawler, which uses simple rules derived from interclass linkage patterns to decide its next move.

该文针对聚焦爬虫这一研究热点，对现今聚焦爬虫的爬行方法(主要是网页分析算法和网页搜索策略)做了深入分析和对比，提出了一种改进的聚焦爬行算法。

How to design a more efficient and faster web crawler is becoming a hot issue in the research of web crawler.

如何设计高效、快速的网络爬虫，成为目前网络爬虫研究的热点。

Based on the analysis of the principle of the Web Crawler, and the multithreading technology, this article designs this Web Crawler procedure.

文章在分析网络爬虫的工作原理的基础上，结合多线程技术，设计了这个网络爬虫程序。

The mode of tracklayer traction used that crawler traction device and wheel hub axis united to control the traction.The question including the traction force match of crawler and moving axis and the stability of running speed directly concerns tracklayer track-lying quality and efficiency.

由于铺轨机组牵引采用履带式牵引装置和轮轨式动力轴联合操控牵引的方式，履带和动轴牵引力匹配，走行速度的稳定性，直接影响铺轨的质量和效率。

The distribution of sales by size, i.e., horsepower, is also quite different for crawler dozers and crawler loaders.

从马力大小看销量分配，履带式推土机和履带式装载机也是差异很大的。

60 Rollover Protective Structures 滚动保护结构 Rollover protective structures apply to the following types of materials handling equipment: All rubber-tired, self-propelled scrapers, rubber-tired frontend loaders, rubber-tired dozers, wheel-type agricultural and industrial tractors, crawler tractors, crawler-type loaders, and motor graders, with or without attachments, that are used in construction work.

滚动保护结构适用于下列类型的材料处理设备：所有橡胶轮胎的，自力推进的铲运机，橡胶轮胎的前端装载机，橡胶轮胎的推土机，轮式农用和工业拖拉机，履带式拖拉机，履带式装载机，和机动平地机，带有或不带有附件的用于施工工作的那些机械设备。

For the head-teacher of the class said that I had seriously broken the school rules,which led me to a three-day suspend class.

为什么呢？因为我的班主任说我严重的违反了校规，于是让我停课三天。

Many of them believe that the conversion of thousands of working-class folk in England spared that nation from the mass carnage and the tyranny that came with the revolution in France.

他们之中有许多人相信，在英国数以千计的劳工阶级之悔改信主使英国免於遭受如法国大革命所造成的大屠杀和专制暴政。