公私合作模式在准经营性基础设施项目中的应用

针对准经营性基础设施投融资体制改革,深入分析了准经营性基础设施项目的特点,指出其较强的正外部性与一定的公益性限制是导致社会融资吸引力低的症结.通过案例借鉴与分析,围绕正外部性的补偿与矫正,提出转移支付与协议捆绑两条现实解决途径,并对两种方式下的公私合作模式进行了界定.     

城市轨道交通iAFC方案研究

移动支付、语音购票、刷脸过闸等技术是城市轨道交通AFC(自动售检票系统)未来发展的方向。本文针对城市轨道交通领域移动支付技术的发展和应用,结合徐州地铁iAFC(互联网售检票系统)建设方案,对iAFC系统架构、业务场景、接口设计等方面进行阐述,对类似新建或改造AFC项目提供借鉴。     

经营期、偿债期届满高速公路管理体制构建分析

1984年提出的收费公路政策极大的促进了我国公路事业的发展。针对现行法规对届满高速公路收回及收回后的运营管理方面的规定仍然比较欠缺,难以指导届满高速公路回收管理的具体实践等问题,对届满高速公路收回后管理体制面临的主要问题、制定原则、选择思路以及管理体制构建进行分析。并提出尽快完善《收费公路管理条例》、加快届满高速公路收回流程及相关技术标准的制定和注重借鉴国外相关经验的建议措施。     

“互联网+”时代城市轨道交通自动售检票系统设计

随着智能手机和移动互联网的大规模普及,移动支付应用场景不断出现,城市轨道交通自动售检票(AFC)系统也开始应用移动支付,通过不同技术手段实现互联网购票、取票和刷码过闸。分析对比了各类移动支付方式的特点,提出了“互联网+”AFC系统的总体设计思路,明确了“互联网+”AFC系统的架构、各层级功能、外部系统接口设计和配置优化建议,并展望了“互联网+”时代AFC系统的设计及发展方向。     

Evaluation of ultimate strength of stiffened panels under longitudinal thrust

A series of collapse analyses is performed applying nonlinear FEM on stiffened panels subjected to longitudinal thrust. MSC.Marc is used. Numbers, types and sizes of stiffeners are varied and so slenderness ratio as well as aspect ratio of local panels partitioned by stiffeners keeping the spacing between adjacent longitudinal stiffeners the same. Initial deflection of a thin-horse mode is imposed on local panels and that of flexural buckling and tripping modes on stiffeners to represent actual initial deflection in stiffened panels in ship structures. On the basis of the calculated results, buckling/plastic collapse behaviour of stiffened panels under longitudinal thrust is investigated. The calculated ultimate strength are compared with those obtained by applying several existing methods such as CSR for bulk carriers and PULS. Simple formulas for stiffened panels, of which collapse is dominated fundamentally by the collapse of local panels between longitudinal stiffeners, are also examined if they accurately estimate the ultimate strength. Through comparison of the estimated results with the FEM results, it has been concluded that PULS and modified FYH formulas fundamentally give good estimation of the ultimate strength of stiffened panels under longitudinal thrust.     

应用斜桩实用公式计算高桩刚性桩台桩力影响线

应用桥梁承台斜桩实用公式法推导出刚性桩台桩力影响线的计算公式,并应用于港口工程高桩刚性桩台桩力影响线的计算,其结果完全能满足工程设计要求。该公式简单、实用、方便,可供设计人员结构设计时参考。     

对如何正确应用铁路工程量清单计价模式的思考

通过对近年来部分铁路土建工程招标文件以及铁路建设施工合同的研究、比较及分析，总结出构成及制约当前铁路工程量清单计价模式的共同因素，分析影响铁路工程施工价格的因素，对构筑健康有序的建筑市场环境、充分发挥铁路工程量清单计价模式的作用进行思考。     

国库集中支付制度对内蒙古自治区交通建设的影响(连载二)

根据内蒙古公路交通建设现状和特点,阐述了国库集中支付制度对我区公路交通建设的影响,并分析了产生影响的原因,提出适应公路建设发展的国库集中支付制度的改革思路。     

Prediction of hull girder moment-carrying capacity using kinematic displacement theory

The hull girder moment capacity of a very large crude oil carrier (VLCC) called Energy Concentration (EC), for which many benchmark studies have been carried out using the simple progressive collapse method (SPCM), is predicted. In this study, three approaches are used to represent the load-shortening behavior, so-called average compressive strength, of a stiffened panel, comprising the hull section: 1) kinematic displacement theory (KDT); 2) nonlinear finite element analysis (FEA); and 3) simple formulas in the common structural rule (CSR) for tankers. Load-shortening curves for various kinds of stiffened panels in EC are compared for five different scenarios with variations of load-shortening approaches and initial imperfections. In order to verify the effect of load-shortening on the prediction accuracy of the hull girder moment-carrying capacity, load-shortening curves are imported into an SPCM-based in-house program called Ultimate Moment Analysis of Damaged Ships (UMADS). Comparison of the hull girder ultimate strength for general heeling conditions, including hogging and sagging conditions, reveals that the load-shortening curves significantly affect the hull girder moment-carrying capacities. Based on our comparison of these capacities with other benchmark results, it is concluded that nonlinear FEA provided the most conservative results, KDT provided the second most conservative results, and the CSR formulas predicted the upper bound.     

利用Excel辅助计量支付管理

通过表格形式 ,介绍了利用Excel的分类汇总、筛选及数据引用等数据处理功能来实现工程计量支付的辅助管理 ,对工程项目的计量支付工作具有理论和实践意义