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1故障现象贵州三狮汽车销售服务有限公司反馈一辆东风标致3008轿车,由神龙汽车有限公司生产,购车日期:2015年6月16日,故障日期:2015年7月14日。配备EP6发动机,AT6Ⅲ自动变速器,带STT(起停)功能,全景天窗,故障时里程为2 961 km。行驶不到3 000km,就开始出现加速无力,发动机故障灯亮,并且故 相似文献
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Various flexible mechanisms related to quality of service (QoS) provisioning have been specified for uplink traffic at the
medium access control (MAC) layer in the IEEE 802.16 standards. Among the mechanisms, contention based bandwidth request scheme
can be used to indicate bandwidth demands to the base station for the non-real-time polling and best-effort services. These
two services are used for most applications with unknown traffic characteristics. Due to the diverse QoS requirements of those
applications, service differentiation (SD) is anticipated over the contention based bandwidth request scheme. In this paper
we investigate the SD with the bandwidth request scheme by means of assigning different channel access parameters and bandwidth
allocation priorities at different packets arrival probability. The effectiveness of the differentiation schemes is evaluated
by simulations. It is observed that the initial backoff window can be efficient in SD, and if combined with the bandwidth
allocation priority, the SD performances will be better.
Foundation item: the National Basic Research Program (973) of China (No. 2005C13321804) 相似文献
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以某高速公路T梁预制移动台座智能集成化工厂为例,比较传统与智能集成化预制场两者差异,在此基础上说明其在自行式液压模板施工、恒温蒸养养生、预应力分次张拉等关键工艺与质量的控制,结果表明通过集成化生产的梁体钢筋保护层厚度、色泽、混凝土强度、预应力张拉力均达到理想的质量效果,最后对智能集成化工厂的T梁生产成本与控制与生产规模进行分析。 相似文献
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以DJK140型架桥机机臂悬伸38 m工况为例,分析了架桥机主机车架前辅助支撑对其前转向架的减载作用,得出了前辅助支撑所受荷载的计算公式.在实际应用中,用户可通过调整前辅助支撑与钢轨面之间的间隙决定前辅助支撑减载作用的大小. 相似文献
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结合龙潭沟大桥施工,介绍无支架组合钢模板翻升与塔式吊机垂直运输相结合的薄壁空心高墩的施工工艺,过程控制,为今后同类工程施工提供参考。 相似文献