Zhongguan Village, China's Silicon Valley

In 1999,driven by the dream of using technology to change people‘s lives, Li Yanhong,returned to Zhongguan- cun (Zhongguan Village in Chinese), Beijing from Silicon Valley in the U.S.to create Baidu.com.Over the years,Baidu has become the most frequently hitted website in China as well as the largest Chinese search engine and Chinese lan- guage website in the world.In August     

基于Lucene的搜索引擎系统的开发与应用

随着网络信息的普及,搜索引擎的作用日益明显。回顾了搜索引擎技术的发展历程,介绍了搜索引擎的工作原理,在此基础上结合企业的实际应用阐述了搜索引擎应用系统的开发过程。     

提高发动机大修合格率的方法

介绍了如何提高发动机大修质量的整个过程,通过六西格管理绿带项目—《提高发动机大修合格率的方法》对发动机大修流程进行了充分的梳理,运用六西格玛管理工具中排列图、因果图以及minitab软件进行全面分析,找出影响发动机大修合格率的关键因素,通过对关键因素的确认,并有针对性地提出改进方法,使大修发动机合格率得到显著提升。     

元搜索引擎研究

该文对元搜索引擎进行了界定,阐述元搜索引擎的特征、分类及其运作原理,研究了元搜索引擎几项关键技术,并讨论了它的未来发展方向。     

重型瓦楞包装在发动机出口CKD项目中的应用

传统发动机出口包装大多采用一次性木质包装,不环保、成本高且取用不便。以出口发动机CKD项目为例,基于绿色包装理念,选用重型瓦楞包装,以纸代木,对发动机重新进行集合包装设计,满足CKD零件的包装防护需求的同时,也实现了绿色环保和降本增效的双重目标。     

内燃机代用燃料的废气排放探讨

机动车尾气污染已更甚于煤烟型污染 ,成为城市大气环境的主要污染源 ,分析了燃用 7种不同的代用燃料的 CO,NOx,HC,CO2 的排放量及烟度值 ,并与燃用传统燃料(汽油或柴油 )作了比较 ,其中着重分析了燃用压缩天然气及压缩天然气 -柴油双燃料的废气排放情况 ,指出燃用代用燃料将减轻对大气环境的危害 ,改善大气环境质量。     

柴油机机油的选用与失效

柴油机的机油,如选用不恰当,会使柴油机功率降低,机械磨损加大。了解柴油机机油的质量粘度等级和失效方法,对延长柴油机使用寿命有益。     

Travel queries on cities in the United States: Implications for search engine marketing for tourist destinations

Given the growing importance of search in online travel planning, marketers need to better understand the behavioural aspect of search engines use. Built upon a number of previous studies, the goal of this research is to identify patterns in online travel queries across tourist destinations. Utilizing transaction log files from a number of search engines, the analysis shows important patterns in the way travel queries are constructed as well as the commonalities and differences in travel queries about different cities in the United States. The ratio of travel queries among all queries about a specific city seems to associate with the “touristic” level of that city. Also, keywords in travelers' queries reflect their knowledge about the city and its competitors. This paper offers insights into the way tourism destinations are searched online as well as implications for search engine marketing for destinations.     

康明斯发动机操作及维护保养要点

康明斯发动机采用国际上流行的标准集成化模块式设计,结构简单紧凑,配件通用化程度高。采用增压、增压中冷以及空气对空气中冷措施,仅改变与发动机动力有直接关系的零部件。可获得不同功率,不同用途的发机系列。为了使康明斯发动机更好使用,也使维修人员尽快地掌握维修技术,现将康明斯发动机操作及维护保养要点作简要的介绍。