Hepatic CT image query based on threshold-based classification scheme with gabor features

Hepatic computed tomography(CT) images with Gabor function were analyzed.Then a threshold-based classification scheme was proposed using Gabor features and proceeded with the retrieval of the hepatic CT images.In our experiments, a batch of hepatic CT images containing several types of CT findings was used and compared with the Zhao's image classification scheme, support vector machines(SVM) scheme and threshold-based scheme.     

Identity-based verifiably committed signature scheme without random oracles

An identity-based verifiably committed signature scheme （IB-VCS） was proposed, which is proved secure in the standard model （i.e., without random oracles）. It enjoys the setup-free property and stand-alone property, both of which make an exchange protocol more practical. The scheme is unconditionally secure against the cheating signer, its security against the cheating verifier is reduced to the computational Diffie-Hellman （CDH） problem in the underlying group, it is secure against the cheating trusted third party if the underlying Paterson Schuldt＇s identity based signature （IBS） scheme is secure, which is proven true based on the CDH assumption in the standard model.     

沿江高速铁路引入合肥枢纽的关键问题

规划年度(2030年)合肥枢纽将形成衔接9个方向、13条线路的大型放射状枢纽.但随着沿江高速铁路建设的提前,沿江高速铁路与既有沪蓉铁路在枢纽内共通道能力是否满足需求、枢纽的客运系统布局和客运站分工是否合理、引入车站站型方案是否最优是面临的关键问题.本文根据研究年度(近期2035年、远期2045年)的枢纽客运量及车流特点,结合既有沪蓉铁路的功能定位及分工调整,对枢纽内主要客运站和区段能力进行分析,对引入车站站型进行研究.通过定量和定性分析,从契合城市总体规划、运输组织的便捷性、线路平面条件、工程实施难易度、工程建设条件、投资等多方面综合比选,优化了枢纽的客运系统布局和客运站分工,确定了合理的枢纽引入方案.     

Airline ambidextrous competition under an emissions trading scheme – A reference-dependent behavioral perspective

This study presents a reference-dependent Hotelling model for analyzing airline competition in pricing and green transportation investment, as well as the resulting financial performance under the European Union emission trading scheme. One feature of the proposed methodology is that it embeds psychological benefits/costs of consumers to characterize consumer attitudes to the increases in airline fare adjustments and improvements in green transportation. This study then investigates the equilibrium solutions for airfare adjustment and green transportation investment margins in different scenarios. The analytical results reveal specific operational conditions under which a cost-efficient airline can gain supreme competitive advantage by increasing both airfare and green transportation investment margins beyond the increases made by competitors under the emission trading scheme, whereas certain specific conditions may favor a cost leadership strategy. Conversely, a cost-inefficient airline can compete with a cost-efficient airline in both market share and profitability using the green transportation investment-differentiation strategy, particularly when consumers perceive the airfare difference as equaling the increased psychological benefit induced by the airline’s green effort.     

机动性管理措施的质量管理——促进城市交通可持续发展的方案

机动性管理一直是欧洲促进和实现城市交通可持续发展普遍采用的方法。然而,机动性管理政策和措施在欧洲城市的发展未能遵循一个有组织且持续的方法,用以规划、设计、应用和评估综合机动性管理系统。在这一背景下,基于质量管理原则,提出一个促进城市系统地发展及实施机动性管理规划和措施的方案。这一机动性管理的质量管理方案（QMSMM）由4个主要组成成分整合而成,包括政策制定、规划、实施及监测和评估。详细阐述了QMSMM的结构、组成成分和要素,以及支撑评估该方案与城市的适用性和相容性的过程。除此之外,对QMSMM在比利时科特赖克市机动性管理计划中的应用开展实证研究。     

Bottleneck model revisited: An activity-based perspective

The timing of commuting trips made during morning and evening peaks has typically been investigated using Vickrey’s bottleneck model. However, in the conventional trip-based approach, the decisions that commuters make during the day about their activity schedules and time use are not explicitly considered. This study extends the bottleneck model to address the scheduling problem of commuters’ morning home-to-work and evening work-to-home journeys by using an activity-based approach. A day-long activity-travel scheduling model is proposed for the simultaneous determination of departure times for morning and evening commutes, together with allocations of time during the day among travel and activities undertaken at home or at the workplace. The proposed model maximizes the total net utility of the home-based tour, which is the difference between the benefits derived from participating in activities and the disutility incurred by travel between activity locations. The properties of the model solution are analytically explored and compared with the conventional bottleneck model for a special case with constant marginal-activity utility. For the case with linear marginal-activity utility, we develop a heuristic procedure to seek the equilibrium scheduling solution. We also explore the effects of marginal-work utility (or the employees’ average wage level) and of flexible work-hour schemes on the scheduling problem in relation to the morning and evening commuting tours.     

复杂条件下隧道设计方案探讨

通过对猪油岗隧道出口段,强风化千枚岩地层长浅埋偏压段隧道方案拟定过程的讨论,可以看出特殊条件下隧道方案的确定应进行多方案必选,在保证安全实用、质量可靠、经济合理、技术先进的前提下,尽量做到绿色环保,并应对选定方案进行必要的分析计算。     

宿迁市洋河大道快速化改造总体方案设计

以宿迁市洋河大道快速化改造设计为例,对项目的功能定位、建设规模、技术标准、总体布置方案、重要节点方案等方面进行了重点论述,相关设计成果可供类似工程的设计及建设工作者参考.     

一种改进的铁路异物侵限监测方案研究

通过对铁路传统异物侵限监测方案的对比分析，提出一种基于智能双电网的异物侵限监测新方案，并对优化方案的工作原理、系统构成等关键技术进行较为详细的描述。     

天津集疏港海河大桥(旧)钢箱梁维修加固工程设计与施工

天津集疏港海河大桥(旧)为一座2002年建成通车独塔斜拉桥,主跨310 m,结构形式为钢箱梁(289 m)+混凝土箱梁(20 m),主要介绍其钢箱梁在2010年度进行维修改造时的方案设计与施工组织。