连续配筋混凝土板在岩溶及采空区公路建设中的应用

采用连续配筋混凝土板对岩溶及采空区路基进行处理，可增强路面层抵抗弯矩的能力，消除安全隐患，具有良好的经济效益。本文给出的连续配筋混凝土路面板配筋计算公式经济合理，三维有限元整体分析安全可靠，对于西部高等级公路岩溶及采空区的处理具有较好的借鉴意义。     

悬索桥施工质量控制技术

结合宜昌长江公路大桥的建设实际，分析了大跨度悬索桥关键部位质量的影响因素，研究了相应控制质量的主要技术措施和方法。     

水泥强度快速检测试验研究

工程实际中应快速测定硅酸盐水泥强度，对于加快土木建筑工程施工速度，确保混凝土质量，充分合理地利用水泥活性十分重要，根据对承德地区14个品牌的175组新标准水泥的试验结果，研究了1.5h压蒸养护促硬快速检测水泥强度与28d标准强度之间的关系。通过分析它们之间的回归关系曲线表明，1.5h压蒸养护促硬快测水泥强度与28d标准强度之间的相关性高度显著。研究结果还表明，利用1.5h压蒸养护促硬快速检测和推测水泥强度的方法切实可行，该方法所建立的上述关系曲线适合于进行区域性推广应用。     

永寿梁隧道渗流场分析

通过隧道开挖的有限元数值模拟,设定全排水、注浆堵水和盲沟排放3种工况,分析永寿梁隧道开挖对水环境所产生的影响,即地下水的变化规律和变化趋势等,分析结果表明:隧道开挖造成了隧道周围地下水位和水压的变化,围岩径向注浆能够在一定程度上控制地下水的流失,通过盲沟泄水孔3种间距的数值模拟给出了泄水孔的流量,可以作为排水沟断面设计...     

PM2.5 and NOx from traffic: Human health impacts,external costs and policy implications from the Belgian perspective

This article employs an optimized impact pathway approach to marginal external health costs that relies on high-resolution dispersion models calibrated for Belgium and the surrounding areas. Per tonne, the MEHC_PM2.5 is found to be many times larger than MEHC_NOx, which is currently negative. Further, the impact of Belgian PM_2.5 emissions in the immediate area of generation is significantly larger than the impact on more distant areas; the opposite is true for NO_x. The MEHCs of both pollutants are predicted to increase in the coming years. Further analysis of the impacts of PM_2.5 and NO_x reveals that, on average, modern gasoline vehicles outperform their diesel counterparts as far as future emissions are concerned. This contrasts with findings for 2007, which suggested that Euro 5 diesels had fewer associated health costs because of the potential for ozone reduction offered by their NO_x emissions.     

Integrated Environmental Modeling and Assessment of Coastal Ecosystems: Application for Aquaculture Management

This article presents an approach that couples coastal ecosystem modeling with integrated environmental assessment methodologies to support coastal management. The focus is to support the development of an ecosystem approach to aquaculture management including interactions with watershed substance loading. A Chinese bay, with intense aquaculture and multiple catchment uses, and where significant modeling efforts were undertaken is used as a case study. The ecosystem model developed for this bay is used to run scenarios that test the local management strategy for nutrient reduction. The corresponding ecological and economic impacts of the managers’ scenarios are analyzed by means of the Differential Drivers-Pressure-State-Impact-Response (ΔDPSIR) analysis. Emphasis is given to the analysis of the eutrophication process in the bay including present eutrophic condition and the expected changes due to the simulated scenarios. For this purpose, the Assessment of Estuarine Trophic Status (ASSETS) screening model is a valuable tool to interpret and classify the data and model outputs regarding eutrophication condition and to evaluate the manageable level of the nutrient loading entering in the bay.     

Do mergers and alliances influence European shipping and port competition?

In Europe, ports are confronted with a closer integration in the maritime and shipping industries. The co-operation agreements can take several forms such as alliances and mergers among shipping lines, conferences, involvement of shipping companies in terminal management, and extending interests in inland transport of shipping companies. In this paper we give a brief overview of these different types of agreement and we examine the consequences of this evolution of the market structures in which ports and shipping companies have to operate. More specifically, attention goes to the competitive position of the port in this new environment. It is clear that the role of the port and the port authorities has to be redefined to guarantee that it remains a fully fledged player in this fast evolving integrated market.     

独塔对称自锚式悬索桥简化解析解研究

自锚式悬索桥在初步设计阶段,需频繁修改设计和变更计算参数,工作量大,迫切需要一种快速求解的方法,使设计人员迅速了解桥梁受力状态及其随参数变化的情况.为此,根据独塔对称自锚式悬索桥的受力特点,基于最小势能原理,提出一种求解内力和变形的简化解析方法.将自锚式悬索桥分离为加劲梁体系和主缆体系,分别计算恒载和活载作用下的吊索力...     

文字学与古籍的翻译

汉字从古老的象形字发展而来。汉字的字形直接显示字义的全部或部分。汉字的特、点使汉语作，特别是古代典籍的英译有着特别的困难。译在翻译古代典籍的时候，必须具备一定的字学知识。     

船运散装液体化学品溢漏应急地理信息系统的研究

为了有效地减少船运散装液体化学品溢漏事故导致人身伤亡与环境污染，将目前方兴未艾的地理信息系统应用在船运散装液体化学品溢漏事故上，利用Mapinfo自带的二次开发工具MapBasic对船运散装液体化学品溢漏应急地理信息系统做开发研究，取得了实质性的进展。重点介绍了系统的实际开发创建过程（包括数学模型建立，数据库建立与管理，编程语言及其关键技术）以及系统所能实现的功能。希望能为国内外同行的研究提供参考。