浅谈重卡进气系统发展趋势

随着国家对于节能减排的重视程度日益增强,相关法规对整车的排放性能、能耗水平的要求不断提高。进气系统对动力性、经济性、排放性能都有较大影响,因此进气系统的设计是否合理对整车性能能否达成有较大影响。文章以重卡进气系统为例,介绍了进气系统的作用,结构组成,近年来应用的新技术以及未来的发展趋势,文章对进气系统的设计具有一定指导作用。     

潭耒混凝土桥面开裂成因分析及坑洞修补技术探讨

随着交通流量和超载车辆的不断增加,潭耒高速公路桥面铺装损坏较为严重,维修周期越来越短,甚至出现了修补不久再次出现开裂、破碎、坑洞的现象.针对这一现象,对潭耒桥面开裂的成因进行了分析,并就改性环氧树脂进行桥面坑洞修补的技术进行了探讨.     

市场营销类课程线上教学效果的影响因素研究

伴随着新型冠状病毒肺炎疫情防控进入常态化阶段,我国有关部门要求停课不停教、停课不停学,确保线上与线下教学实质等效。然而,线上学习的质量和效果未达预期,学习者普遍存在自主学习主观动因较弱、情境支持不足、监督管控失衡等问题。由于“容易掌握基础知识、难以实现高阶目标”的知识结构特征,上述问题在市场营销类课程的线上学习中表现得尤为明显。文章研究了学习意愿和学习行为、教师支持和教师互动、教学资源和教学模式等影响因素,旨在增强市场营销类课程线上教学效果。     

乘客中途下车遭车祸责任谁担

裁判要旨：无意思联络的数人数个行为间接结合发生同一损害后果，加害人承担与各自的过失大小或者原因力比例相适应的按份责任，而非连带责任。[编者按]     

CRH380A型动车组刮雨器四级修简述及故障诊断

介绍CRH380A型动车组刮雨器四级捡修过程中关于刮臂、驱动机构、控制装置及其线路和管路的检修内容,并对该型号刮雨器四级检修过程中常见故障进行分析。     

A novel vertical handoff algorithm based on fuzzy logic in aid of grey prediction theory in wireless heterogeneous networks

To coordinate the various access technologies in the 4G communication system, intelligent vertical handoff algorithms are required. This paper mainly deals with a novel vertical handoff decision algorithm based on fuzzy logic with the aid of grey theory and dynamic weights adaptation. The grey prediction theory (GPT) takes 4 sampled received signal strengths as input parameters, and calculates the predicted received signal strength in order to reduce the call dropping probability. The fuzzy logic theory based quantitative decision algorithm takes 3 quality of service (QoS) metric, received signal strength (RSS), available bandwidth (BW), and monetary cost (MC) of candidate networks as input parameters. The weight of each QoS metrics is adjusted along with the networks changing to trace the network condition. The final optimized vertical handoff decision is made by comparing the quantitative decision values of the candidate networks. Simulation results demonstrate that the proposed algorithm provides high performance in heterogeneous as well as homogeneous network environments.