navigation n. 1.航行;导航;领航;航海[航空]术。 2.〔集合词〕船。 3.〔古语〕航路;海上交通。 aerial navigation 空中航行。 inland navigation 内河航行。 astro navigation 宇宙航行;天文导航。 blind navigation 仪表导航。 the N- Acts 〔英国〕航海条例。 There has been an increase in navigation through the canal. 通过那条运河的船数增多了。 adj. -al
The meeting established a working group to meet the requirement for a meteorology chapter of the global air navigation plan for the communication navigation surveillance air traffic management cns atm systems for the asia pacific region 会议设立了一个工作小组,为亚太区草拟一有关气象章节,以支援通讯导航巡测空中交通管理cnsatm系统中的全球空中导航计划。
The meeting established a working group to meet the requirement for a meteorology chapter of the global air navigation plan for the communication navigation surveillance air traffic management ( cnsatm ) systems for the asiapacific region 会议设立了一个工作小组,为亚太区草拟一有关气象章节,以支援通讯、导航、巡测空中交通管理(cnsatm)系统中的全球空中导航计划。
Items on the agenda include the theme of the conference, air navigation planning and implementation, communications navigation surveillanceair traffic management implementation, aviation safety, aviation security, air transport and technical co-operation 会议的议程包括大会的会议主题、航空导航策划及实施、卫星通讯及导航监察航空交通管理系统实施、航空安全、航空保安、航空运输及技术合作。
Items on the agenda include the theme of the conference, air navigation planning and implementation, communications navigation surveillanceair traffic management ( cnsatm ) implementation, aviation safety, aviation security, air transport and technical co-operation 会议的议程将包括大会的会议主题、航空导航策划及实施、卫星通讯及导航监察航空交通管理系统实施、航空安全、航空保安、航空运输及技术合作。
Secondly, using web data charactors, the paper is to build relational abstractions of large and fairly well-structured web sites and to use an optimizer to translate declarative queries on these relational abstractions to efficient navigation plans . we use a simple subset of the araneus data model ( adm ) to describe web sites . this adm scheme is augmented with link constraints that capture the redundancy present in many web sites . this paper also use inclusion constraints that state that all the pages that can be accessed using a certain path can also be accessed using another path 本论文使用adm(thearaneusdatamodel)数据模型的一个子集来描述web网站。这种基于叭花b视图高效查询系统的研究摘要adm数据模型是依靠增加链接约束来获取网站上的冗余。论文使用包含约束(inclusionconstraini),它规定所有能被一个确定的路径访问到的页面,同样也可以使用另一条路径访问到页面。
When a query on the relational views is issued, it is repeatedly rewritten using the rules . this process generates number of navigation plans to compute the query; the cost of these plans is then estimated based on a simple cost model that takes network accesses as the primary cost parameter . in this way, an efficient execution plan is selected for processing the query 当根据关系视图发出一个查询时,它被重复的使用重写规则来重写,这个过程产生大量的导航方案来运算查询。这些方案的代价是根据代价模型来评估的。代价模型是用网络访问作为原始的代价参数。
A total of 93 discussioninformation papers were submitted for the conference . besides the theme topic, items discussed included air navigation planning and implementation, satellite-based communications, navigation, surveillanceair traffic management ( cnsatm ) implementation activities, aviation safety, aviation security, air transport and technical cooperation 除了会议主题外,其他议程还包括航空导航规划和实施事宜,卫星通讯、导航及监察?航空交通管理系统的施行情况,以及航空安全、航空保安、航空运输和技术合作等项目。
We use a navigational algebra as the target ganguage the describes navigation plans and we show how to us rewrite rules in the spirit of relational optimizers and, taking link and inclusion constraints into account, to reduce the number of page accesses needed to answer a query 我们使用引导代数(navigationalalgebra)作为描述导航方案的目标语言,同时我们在研究最优化关系抽象中使用重写规则,将链接约束和包含约束引入到运算中,以便在回答查询中,减少大量需要访问的页面数量。