lav [læv]
- lav的基本解释
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n.
盥洗室, 厕所, 洗手间, 洗脸盆, 抽水马桶, 洗礼盆, 公共厕所
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This paper introduces the background knowledge of heterogeneous data integration, as well as the knowledge of data integration. On the basis of the above, The author develops an ontology-based Heterogeneous data Integration prototype system, expounds the main framework and essiontial technology. Then the paper introduces its work in detail: it explains the very significance of using ontology as an comon semantic description and an global query model ,and illustrates the reason fo adopting LAV method ; then it builds the formal representation of the mapping between ontology and data resources, applies OWL to describe the ontology and the mapping ; defines a query language named by DIQL to query on our integration system , and supply the detailed arithmetic of reolving partial binding of LAV method、locating of data sources and query rewriting,etc. Finally,the paper demostrates and proves the result of research by examples .
本文介绍了目前异构数据集成的研究现状以及数据集成和本体的相关背景知识,并在此基础上设计开发了一个基于本体的异构数据LAV集成原型系统,同时对原型系统的总体框架、关键实现技术分别做了讨论:首先阐述了将本体作为公共语义描述和全局查询模型的意义,给出了采用LAV集成方案的理由,然后规定了本体和数据源间映射的形式化表示方式,采用能结合描述逻辑和框架系统的优点、适合于半结构化环境的OWL表示本体和映射;其次定义了一种针对集成系统的查询语言DIQL,并在此基础上给出解决LAV部分绑定问题、数据源定位以及查询重写的算法;最后在原型系统的基础上,通过实例验证本文所提方法的可行性。
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When I tell you that I spent the first three days of my stay shuffling brokenly in my dressing gown, barely able to speak and always within close proximity of a lav, I am being factual.
我告诉你的是事实,我在疗程的头三天身穿晨衣跌跌撞撞地拖着腿行走,几乎无法说话,总想上洗手间。
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The commercial CFD software Fluent was used for simalation of aerodynamic charactirestics of some terminal guided munitions in terminal segment under different affack anyle and mach, the variation lav of or lift coeflienct, drag coeflient and roll moment coefficient with flight mach and attacls angle was obtained, The semulation result shows the caculated aerodynarve parameters can be referend to high accuracy firing table for the terminal guided projectile.
文中主要利用商业CFD软件Fluent对某型末制导炮弹的末制导段在不同攻角、不同飞行马赫数的气动特性进行了数值仿真,得出了该型末制导炮弹升力系数、阻力系数和滚转力矩系数随飞行马赫数和攻角的变化规律。结果表明,计算所得气动参数可以为该末制导炮弹编制高精度射表提供数据依据和参考。
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LAV Langer:德国 高温球阀
LAUMANN 德国 安全阀 | LAV Langer 德国 高温球阀 | LESER 德国 安全阀
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LAV:轻型装甲车辆
1982年,剪刀鱼8 8型在美国轻型装甲车辆(LAV)竞标中获胜,由此获得了700多辆的订单. 该车的生产由加拿大通用汽车公司完成. 与剪刀鱼I/II相比,剪刀鱼III型6 6、8 8都相应提高了机动性;车体进行了重新设计,长宽都有所增加,
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LAV:轻型装甲车
近日,美国陆军坦克-机动车辆和武器指挥部与通用动力公司地面系统分公司签订一份价值1460万美元的完全固定总价合同,为轻型装甲车(LAV)生产第二代悬挂装置升级套件.
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LAV:轻装甲车辆
IFV 步兵作战车辆 | LAV 轻装甲车辆 | LVT 履带式轻装甲车辆
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LAV:盥洗室
lav 洗手间 | lav 盥洗室 | lava 岩浆
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