Rising Sea Levels: Helping Decision-Makers Confront the Inevitable

Sea-level rise (SLR) is not just a future trend; it is occurring now in most coastal regions across the globe. It thus impacts not only long-range planning in coastal environments, but also emergency preparedness. Its inevitability and irreversibility on long time scales, in addition to its spatial non-uniformity, uncertain magnitude and timing, and capacity to drive non-stationarity in coastal flooding on planning and engineering timescales, create unique challenges for coastal risk-management decision processes. This review assesses past United States federal efforts to synthesize evolving SLR science in support of coastal risk management. In particular, it outlines the: (1) evolution in global SLR scenarios to those using a risk-based perspective that also considers low-probability but high-consequence outcomes, (2) regionalization of the global scenarios, and (3) use of probabilistic approaches. It also describes efforts to further contextualize regional scenarios by combining local mean sea-level changes with extreme water level projections. Finally, it offers perspectives on key issues relevant to the future uptake, interpretation, and application of sea-level change scenarios in decision-making. These perspectives have utility for efforts to craft standards and guidance for preparedness and resilience measures to reduce the risk of coastal flooding and other impacts related to SLR.     

基于Matlab的空间RSSR机构弹性动力学研究

随着现代科学技术的进步，轻量化和高速化的机械结构也越来越受到广泛关注。因此，结构中的柔性构件的应用也越来越广泛。这些柔性构件会直接导致结构在运动中存在一定的弹性变形，最终导致机械结构的输出误差。通过本文的相关论述，为解决空间RSSR机构因柔性产生的输出误差的计算提供了一种建模计算方法，同时也为补偿由于机构杆件柔性给系统带来的输出误差具有一定的指导意义。     

考虑入射角和局部地形影响的地面地震动效应分析

本文通过建立考虑局部地形条件的场地模型,采用粘弹性理论设置人工边界,考虑入射角进行等效地震荷载输入,对五种不同地形和坡度的场地进行地面地震动效应分析。结果表明,凹状河谷地形和凸状山脊地形相比于平地地形来说对地震动具有放大效应,坡顶的地震响应要高于坡底的地震响应,地面地震动响应大致呈现与地形类似的形状,迎波面地震响应要高于背波面地震响应。     

Carbon dioxide emissions from port container distribution: Spatial characteristics and driving factors

Port carbon dioxide (CO₂) emissions in China have become an ever-increasing public concern due to their significant impacts on human health and the environment. However, existing studies focus mainly on CO₂ emissions from vessels calling at the ports and cargo handling within the ports, paying little attention to the inland distribution networks. To fill this gap, this paper proposes an easily implemented method for calculating CO₂ emissions from port container distribution (PCD) and investigates their spatial characteristics and driving factors. By analyzing 30 container ports in China, the main findings are as follows. First, road transportation is the major contributor of CO₂ emissions from PCD due to the lack of rail and inland water transportation. Second, PCD carbon emissions exhibit significant local spatial clustering. That is, ports with similar geographical locations tend to present a similar pattern of PCD carbon emissions. Third, as suggested by the spatial Durbin model, PCD carbon emissions are negatively determined by local gross domestic product, number of port berths, but are positively determined by local tertiary industry value and highway freight volume, and waterway freight volume in both local and neighboring ports. These results provide empirical insights into cross-port collaboration in reducing PCD carbon emissions.     

智能型列车总线ARCNET通信网卡的研究

分析了ＡＲＣＮＥＴ网络协议及其特点，介绍了列车总线智能型ＡＲＣＮＥＴ通信网卡的硬件设计，给出了网卡的通信软件流程图。试验结果表明：该网卡能够减少主机的开销，并具有实时性好、可靠性高等优点。     

草尾河挖槽河段水位下降及其对上游的影响

挖槽是航道整治的主要措施之一,但挖槽会引起水位下降,给航道通航带来负面影响。为了解水位降落的传递规律,根据洞庭湖草尾河阿弥石至响水坎河段航道全线挖槽的物理模型试验资料,对挖槽所引起的水位下降及其向上游传递规律作了初步分析和论证。     

总线与以太网技术在船闸控制系统中的应用

总线与以太网技术已成为目前国内、外控制系统设计中正在兴起的主流控制技术。本文详细介绍了基本Interbus总线、光纤以太网、PLC和组态软件的船闸控制系统的设计,给出了控制系统的网络结构、中央控制单元、现地控制单元的构成及实现的功能,同时介绍了船闸控制系统的安全措施设计。     

铁路选线中与地方关系的处理

研究目的:铁路作为带状建筑物,涉及面广,经过的经济据点众多,在前期工作中,如何处理好与地方政府的关系,协调好地方政府对于线路走向、站点设置的意见与铁路全线建设之间的矛盾显得尤为重要,直接关系到铁路建设推进速度及后期开展情况的顺利程度。研究结论:作为铁路建设的龙头,选线设计应坚持为地方服务为基础;合理的征求地方政府对于线路方案选择及站点设计的意见、建议;在地方政府提出的要求与全线相矛盾时,在与地方政府进行良好沟通的同时应进行多方案的比选,并坚持原则。     

重庆市轨道交通换乘衔接标准体系建设探讨

在轨道交通出行中,换乘和衔接占用总出行时间的比例往往较高,而这部分出行过程中所使用的设施应达到什么要求目前缺少相关标准进行约束。从提高出行效率的角度,需要对这一环节的关键问题和参数进行分析,提出相应的一般化要求。重庆作为山地城市的代表,其衔接和换乘问题又有其特殊性,部分标准要求需要结合其本地特色具体分析。通过对重庆本地及国内城市换乘站和交通衔接的调查,提出按高峰换乘量分级和按衔接客流性质分类的处理方法,并按分级分类结果提出相应车站设施的标准。     

广义超立方体网络容错路由算法

基于广义超立方体图的局部连通性概念，讨论了具有局部连通性的广义超立方体网络的容错路由算法，一个局部连通的广义超立方体网络可以容许大量的错误结点比较均匀地存在于多个广义子立方体而仍保证其全局连通性．对失效结点比较集中的情况，给出了路由算法。