WAND（Wireless ATM Network Demonstrate）是欧洲ACTS（Advanced Communication Technologies and Services）支持的项目之一。在WAND中采用一种基于集线器式、自适应TDMA方式的MAC协议—MASCARA，它通过预约与竞争相结合的方法，为无...WAND（Wireless ATM Network Demonstrate）是欧洲ACTS（Advanced Communication Technologies and Services）支持的项目之一。在WAND中采用一种基于集线器式、自适应TDMA方式的MAC协议—MASCARA，它通过预约与竞争相结合的方法，为无线ATM（WATM）终端提供具有QoS保证的宽带无线接入。文章着重分析了MASCARA中基于时延的优先权调节调度（PRADOS）算法，并给出了几种不同情况下的算法性能仿真结果。展开更多
The plain of Mascara includes groundwater resources, heavily exploited for the needs of the population, industry and agriculture. However, this resource is under threat from the point of view of quality and quantity. ...The plain of Mascara includes groundwater resources, heavily exploited for the needs of the population, industry and agriculture. However, this resource is under threat from the point of view of quality and quantity. The degradation of water quality comes from water discharges untreated （domestic and/or industrial） and from the irrational use of fertilizers and pesticides in agriculture. The decrease in reserves is due to the effects of intensive exploitation. Several studies on the water resources of the plain generated a mass of very important data. In most cases, these data are disparate at different institutions managers （water resources, environment, etc.）, and are found recorded in paper documents, difficult to exploit. For this reason, it would be essential to use reliable new techniques, namely the GIS （geographic information systems）. The implementation of the GIS of the plain of Mascara （with extension to all the sub-basin of Wadi Fekan） must permit to organize the data and transform it into information. Integration, crossing and superposition of the data with other variables may contribute to spatial analysis and generate very important thematic maps. The GIS constitutes a very effective decision aid tool for the management, exploitation, preservation and protection of water resources. The exploitation possibilities of GIS are multiple, direct or indirect. We give an example as the coupling with a groundwater flow model that may be the subject of additional work.展开更多
雅诗兰黛公司新推出一个名为XL Maximum Length Mascara的睫毛膏，该睫毛膏可以显著加长睫毛。据公司介绍，这款新品的设计灵感来自于蜘蛛丝的弹性，蜘蛛丝尽管较之人体头发的发丝要纤细很多，但它的弹性却是尼龙的两倍。XL Maximum Len...雅诗兰黛公司新推出一个名为XL Maximum Length Mascara的睫毛膏，该睫毛膏可以显著加长睫毛。据公司介绍，这款新品的设计灵感来自于蜘蛛丝的弹性，蜘蛛丝尽管较之人体头发的发丝要纤细很多，但它的弹性却是尼龙的两倍。XL Maximum Length Mastara睫毛膏的配方中加入了一种名为Elong Ex的复合物，该物质结合了新的液体石蜡和人体皮肤纤维，再加上聚合物，从而具有加长睫毛的作用。使用这种新的睫毛膏．可以将睫毛加长达到50％。展开更多
文摘WAND（Wireless ATM Network Demonstrate）是欧洲ACTS（Advanced Communication Technologies and Services）支持的项目之一。在WAND中采用一种基于集线器式、自适应TDMA方式的MAC协议—MASCARA，它通过预约与竞争相结合的方法，为无线ATM（WATM）终端提供具有QoS保证的宽带无线接入。文章着重分析了MASCARA中基于时延的优先权调节调度（PRADOS）算法，并给出了几种不同情况下的算法性能仿真结果。
文摘The plain of Mascara includes groundwater resources, heavily exploited for the needs of the population, industry and agriculture. However, this resource is under threat from the point of view of quality and quantity. The degradation of water quality comes from water discharges untreated （domestic and/or industrial） and from the irrational use of fertilizers and pesticides in agriculture. The decrease in reserves is due to the effects of intensive exploitation. Several studies on the water resources of the plain generated a mass of very important data. In most cases, these data are disparate at different institutions managers （water resources, environment, etc.）, and are found recorded in paper documents, difficult to exploit. For this reason, it would be essential to use reliable new techniques, namely the GIS （geographic information systems）. The implementation of the GIS of the plain of Mascara （with extension to all the sub-basin of Wadi Fekan） must permit to organize the data and transform it into information. Integration, crossing and superposition of the data with other variables may contribute to spatial analysis and generate very important thematic maps. The GIS constitutes a very effective decision aid tool for the management, exploitation, preservation and protection of water resources. The exploitation possibilities of GIS are multiple, direct or indirect. We give an example as the coupling with a groundwater flow model that may be the subject of additional work.
文摘雅诗兰黛公司新推出一个名为XL Maximum Length Mascara的睫毛膏，该睫毛膏可以显著加长睫毛。据公司介绍，这款新品的设计灵感来自于蜘蛛丝的弹性，蜘蛛丝尽管较之人体头发的发丝要纤细很多，但它的弹性却是尼龙的两倍。XL Maximum Length Mastara睫毛膏的配方中加入了一种名为Elong Ex的复合物，该物质结合了新的液体石蜡和人体皮肤纤维，再加上聚合物，从而具有加长睫毛的作用。使用这种新的睫毛膏．可以将睫毛加长达到50％。
