Anticipating PEV buyers’ acceptance of utility controlled charging

Utility controlled-charging (UCC) of plug-in electric vehicles (PEVs) could potentially align vehicle charging with the availability of intermittent, renewable electricity sources. We investigated the case of a nightly charging program where the electric utility can control home PEV charging. To explore consumer acceptance of this form of UCC, we implemented a web-based survey of new vehicle buyers in Canada (n = 1470). The survey assessed interest in PEVs, explained UCC, and elicited openness to UCC through attitudinal questions and a stated choice experiment. We find potential for UCC support among one-half to two-thirds of respondents interested in purchasing a PEV, depending on the scenario. However, some respondents express concerns with privacy and loss of control. To quantify preferences for UCC, we estimated a latent class choice model where respondents chose between different PEV charging programs. The model identified four distinct respondent segments (or classes) that vary in their acceptance of UCC, as well as their valuation of renewable electricity, saving money on their electrical bill, and undergoing charging inconvenience. The overall sample was more sensitive to cost incentives than to renewable incentives, where cost-based UCC programs garnered 63–78% enrollment while renewable-based programs garnered only 49–59% enrollment. Overall, we observe the potential for widespread acceptance of UCC programs among Canadian PEV buyers, but program design and deployment will need to carefully acknowledge the various motivations and concerns of different vehicle buyer segments.     

基于交换式以太网的列车通信网络的交换机排队时延分析

传统列车通信网络的带宽难以满足现代列车数据传输的要求.本文提出了一种基于交换式以太网的列车通信网络解决方案,为了降低列车实时数据的传输时延,为交换机设计了具有优先级的队列调度策略,并采用G/D/1排队论分析了列车实时数据和非实时数据的排队时延,计算证实了该策略可以将实时数据在交换机的平均排队时延降低到70 μs以下.最后,通过网络仿真研究证实了实时周期数据的平均排队时延从无优先级时的91 μs降低到了有优先级时的61 μs.     

G318（西藏境）竹卡澜沧江大桥线形控制与监测

在连续刚构桥施工中,对线形的有效控制是桥梁在不同施工温度及工况下成功合拢及平顺的保证。通过对G318（西藏境）竹卡澜沧江大桥实际施工中的线形控制及监测,探讨了该连续刚构桥梁施工过程中线形控制和监测的要点和方法,为同类桥梁工程的线形监测提供参考。     

未来的GIS体系结构发展模式G.NET

介绍了G .NET技术的特点及其意义     

用隧洞工程优化南水北调中线方案

介绍了南水北调优化方案，对方案的实施期限、工程造价、优越性及可行性进行了分析。     

基于CADDS 5和VB的三维船体结构重量重心及材料统计计算系统

根据平面图计算船体结构重量重心不但繁杂、耗时，而且难以保证计算结果的准确性。采用三维设计软件进行舰船设计，虽然具备计算功能，但仍然不能满足实际工程需要，有必要进行二次开发。以CVMAC和Visual Basic6．0作为开发工具，开发三维船体结构重量重心及材料统计计算系统，可以处理从CADDS5中获得的数据，自动完成区段和全船的重量重心及材料统计计算，提高设计效率和计算准确性。     

橡胶沥青ARSMA-5配合比设计

橡胶沥青路面整个结构是一种柔性体系,由于其优良的应力、应变消减和吸收能力,从而减缓沥青混凝土罩面层反射裂缝的产生.文中结合工程实例详细介绍了ARSMA-5型维他橡胶改性沥青混合料目标配合比设计的各项技术指标及性能验证.对沥青混凝土路面的试验研究进行了总结.     

基于5G+智慧灯杆的区域交通协调优化控制系统功能分析与研究

随着国内城市化的稳步推进,智慧交通建设的理念逐渐得到了广泛的关注.在智慧交通的建设中,车载传感器因其载体局限性,对于规避道路拥堵、优化行车路线上无法起到关键性作用.车路协同的模式越来越受到科研人员的关注.智慧灯杆,因其可拓展性成了智慧交通建设中最佳的感知载体.杆件上可安装监控设施、广播、大屏幕,以及各类传感器、检测器等等一系列的感知设备.依托5G技术,相关交通管理部门可以更及时地掌控实时的交通运行情况.通过对交通流预测模型及区域交通协调优化模型的建立,提前预测中短期内道路交通流的运行情况,依托5G+智慧灯杆编织起的城市感知网络及定向广播系统,对沿途车主定向定量地决策最优的行车导航方案,对城市道路交通进行高效、有效的管理.现以上海5G+智慧灯杆的工程实例为依托展开基于交通流预测模型而开发的区域交通协调优化控制系统功能分析与研究.     

ENHANCEMENT OF DNA SYNTHESIS IN CULTURED ADULT RAT HEPATOCYTES BY 5-HT THROUGH STIMULATION OF 5-HT2 RECEPTOR

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