高速铁路软土路基施工过程中整体稳定性分析

随着我国经济建设的不断发展以及运输系统要求的提高,大量高速铁路在我国广泛修建。然而,在软土区域修建高速铁路,路基施工过程中的整体稳定性一直备受关注。结合工程实例,借助有限元分析的方法,建立三维模型,对路基施工过程整体稳定性进行分析,研究方法及结论能为类似工程设计及施工提供参考依据。     

A Training Framework for Understanding Conflict in the Coastal Zone

The coastal zone is attractive for human settlement because it tends to be resource rich, providing a good location to generate incomes and livelihoods. Equally, however, it is a complex and powerful natural environment, which means that the coastal zone often becomes a focus of conflict with multiple users competing for limited space and resources. Understanding the causes of, and determining solutions to, the ensuing problems requires inputs from a range of analyses across sectors and disciplines. However, different disciplinary and sectoral approaches frequently use different investigative methods, language, and means of presenting results. This article presents a framework that has been developed in collaboration with Indian institutions over the past three years in an effort to address some of these fundamental problems of analysis and translation into policy action. Key components addressed by the framework are strengthening the capacity to practice, knowing how to proceed and how to find out what needs to be known using experience-based problem solving.     

Design and evaluation of an integrated inventory and transportation system

This paper proposes the adoption of an integrated inventory and transportation system (IITS) to minimize the total costs of inventory and transportation. A non-linear programing is developed by analyzing transportation and inventory costs with one supplier and many retailers in the distribution environment. The paper compares the proposed model with the traditional approach in computing total costs with numerical data. The results indicate that the total costs can be optimized by adopting integrated programing rather than the traditional approach, along with achieving improved customer service levels. In particular, sensitivity analysis is applied to determine the performance of the IITS under various transportation costs, holding costs and shortage costs. It shows that the transportation cost per unit is most sensitive in the proposed model. In this situation, the IITS is more effective for cost saving when set-up cost, holding and shortage costs are high, but is less effective for situations involving high per-unit transportation costs.     

Modelling parking choices considering user heterogeneity

We examine car driver’s behaviour when choosing a parking place; the alternatives available are free on-street parking, paid on-street parking and parking in an underground multi-storey car park. A mixed logit model, allowing for correlation between random taste parameters and estimated using stated choice data, is used to infer values of time, both when looking for a parking space and for accessing the final destination. Apart from the cost of parking, we found that vehicle age was a key variable when choosing where to park in Spain. We also found that the perception of the parking charge was fairly heterogeneous, depending both on the drivers’ income levels and whether or not they were local residents. Our results can be generalised for personalised policy making related with parking demand management.     

车辆加载情况下静荷载测试

对于桥梁静荷载试验,试验规范推荐的分级加载方法不能确保在分级加载过程中桥梁结构的多个控制截面同时是安全的。将所有加载车的加载位置比拟成一个广义的点,使得安全动态加载的问题转化成求解安全加载域边界的几何问题,从而很容易计算出安全加载路径。分析安全加载域的定义及计算。     

The California Coastal Act and Ports: The Unintended Environmental Justice Implications of Preserving California's Coastline

Consistent with the policies set forth in the Coastal Zone Management Act, the California Coastal Act seeks to balance the utilization and conservation of coastal resources, taking into account the social and economic needs of the citizens of California. One way the statute pursues this balance is through its provisions for ports. These provisions have functioned as a type of smart growth planning for ports, encouraging densification of existing port districts and possibly averting maritime commercial and industrial sprawl along the California coast. One unintended consequence of the encouraged consolidation of port activities, when combined with the rapid growth in international trade over the last four decades, has been disproportionally large environmental and health impacts on low-income and minority communities surrounding ports. This article examines how the Port of Long Beach's conformance with the California Coastal Act has resulted in ongoing environmental justice concerns. It discusses approaches employed by the Port of Long Beach to reduce environmental justice concerns resulting from significant and unavoidable environmental impacts and offers suggestions for how to address this issue.     

半军事管理模式与文化的耦合及创设

文章基于半军事管理在航海院校人才培养工作中的实践,以半军事管理效能的提升为出发点,提出了半军事管理模式下管理与文化的耦合及创设的方式,具有较强的指导意义。     

开拓岸电技术引领绿色水运——连云港岸电技术介绍

为了进一步节能减排，建设绿色港口，连云港在吸取国内外岸电技术成功技术的基础上，开拓了自己的岸电技术。介绍了连云港港岸电技术的由来，其在绿色水运中的意义，技术方案及其优点。阐述了实施该方案需要解决的问题。对中国在岸电方面引领世界的前景进行了展望。     

回声测深仪计量检定装置的研究

为研究浅水回声测深仪计量检定标准装置,以完成量值传递,文章介绍了2种不同的检定装置,可根据具体环境条件选择水槽比对方式和模拟器方式对回声测深仪进行检定,并对回声测深仪的基本原理、工作流程、2种检定装置的构造、测试结果和优缺点进行了简要的阐述。     

晚期奥斯曼帝国的军事改革评析

奥斯曼帝国最先推行的西化改革政策就是引进西方军事技术,改造旧军队以适应新形势。无论阿布杜.哈米德一世的改革,还是塞利姆三世的改革,目的都是尽快强兵,扭转军事上的败局,带有极强的功利性,但没有取得期望的成效。不过,改革政策倡导向西方学习、引进西方先进技术,对输入外来文明有利。军事改革不成功,主要是难以把旧军队改造成新军队。每次军事改革都会触动军事贵族的利益,军事贵族与其他反素丹的力量联合,要挟甚至废黜推行改革的素丹,迫使改革措施搁浅。直到马哈茂德二世执政之后的第十九年,才彻底摧毁旧军队,为其后的改革扫除了障碍,并建立了新式军队。