舰船供电生命力测试分析

针对目前舰船供电生命力的实际测试问题,从供电生命力的设计原则和电力系统组成两方面出发,对测试指标及测试方法进行分析研究。结合某型舰船性能鉴定工作,设计形成一整套试验方案,并进行实船测试。结果显示,该方案克服了原来的软件设计模拟评估这一缺陷,可为后续舰船性能鉴定工作提供理论和实践支撑,也可为舰船生命力评价提供一条新思路。     

Rescheduling through stop-skipping in dense railway systems

Based on the analysis of the railway system in the Paris region in France, this paper presents a rescheduling problem in which stops on train lines can be skipped and services are retimed to recover when limited disturbances occur. Indeed, in such mass transit systems, minor disturbances tend to propagate and generate larger delays through the shared use of resources, if no action is quickly taken. An integrated Integer Linear Programming model is presented whose objective function minimizes both the recovery time and the waiting time of passengers. Additional criteria related to the weighted number of train stops that are skipped are included in the objective function. Rolling-stock constraints are also taken into account to propose a feasible plan. Computational experiments on real data are conducted to show the impact of rescheduling decisions depending on key parameters such as the duration of the disturbances and the minimal turning time between trains. The trade-off between the different criteria in the objective function is also illustrated and discussed.     

交通型地下空间与周边物业开发结合方式研究

分析了地下空间的特征,引出以轨道交通为主的地下空间与周边物业开发方式结合的原则和要求,并结合相关城市的经验,提出了客流引导型和客流疏导型两种交通型地下空间与周边物业开发的结合方式.     

国内汽车市场驾驶人眼动行为检测技术分析

为研究不同认知分心等级时的驾驶人眼动行为,通过数理统计的分析方法,对实车道路试验采集的驾驶人完成不同等级认知次任务时的眼动行为特性指标进行了对比分析,定量研究了不同认知分心等级时驾驶人的眨眼、扫视及注视的变化规律。结果表明:认知次任务复杂度、眨眼频率、扫视幅度、视野广度之间显著相关。随着认知次任务难度的增加,驾驶人眨眼频率显著增加、搜索广度明显缩小、注视点分布更加集中。可见本文的研究可以为基于眼动行为的驾驶辅助系统的开发提供理论支持。     

创设预告登记制度之必要性--从我国实定法上说起

作为一项重要的物权制度,预告登记起源于中世纪之普鲁士法,其旨在保全以不动产物权变动为目的的债权请求权,赋予该请求权物权的排他效力。本文试图以我国现有法律制度为起点,全面揭示预告登记的范围、性质、效力及构成要件等问题,并就此提出构建我国预告登记制度的一些建议。     

房地产建设项目投资风险的模糊影响图分析

模糊影响图方法由于它的易于理解性和直观性,被广泛的应用.分析了房地产建设项目的投资风险,针对房地产建设项目的特点,将模糊影响图方法进行改进,并运用于一个实例,说明了方法可行性和有效性.     

无人机倾斜摄影技术在铁路行业的应用研究

随着以无人机为飞行平台、搭载高精度传感器的倾斜摄影技术日益成熟,大量倾斜摄影项目应运而生。在铁路行业,无人机倾斜摄影技术从带状地形图、断面图的生成到实景三维模型的制作都展现出巨大的应用前景。本文深入研究无人机倾斜摄影的原理和特点,分析倾斜摄影技术在铁路勘察设计、施工建造、运营管理不同阶段的应用,并对该技术目前存在的问题进行探讨。     

Transit technology investment and selection under urban population volatility: A real option perspective

This paper addresses transit technology investment issues under urban population volatility using a real option approach. Two important problems are investigated: which transit technology should be selected and when should it be introduced. A real option model is proposed to incorporate explicitly the effects of transit technology investment on urban spatial structure in terms of households’ residential location choices and housing market. The trigger population thresholds for investing in a transit technology project and for shifting from a transit technology to another are explored analytically. Comparative static analyses of the urban system and transit technology investment are also carried out. It was found that (i) transit technology investment can induce urban sprawl; (ii) ignoring the effects of transit technology investment on urban spatial equilibrium can lead to a late investment; and (iii) there is a significant difference in the trigger population thresholds for transit technology shift estimated by the net present value approach and the real option approach.     

Cost benefit analysis of three different urban bus drive systems using real driving data

One of the CIVITAS-ELAN project measures in Ljubljana, Slovenia, was the introduction of alternative city bus propulsion systems (CNG, hydraulic hybrid buses) into the public transport and comparison of their performance in terms of costs and benefits with conventional (diesel) buses. A cost-benefit analysis was conducted to provide a model for identifying the most attractive alternative, with aim of aiding the decision making process for future rational up-scaling of the alternative propulsion technologies in PT fleet in Ljubljana. This paper focuses on presenting the key findings of this CBA, using real driving data, while demonstrating the sensitivity/variance of different parameters of a CBA, as well as the differentiation between uncertainties of parameters in an ex-ante analysis versus an ex-post analysis.     

城乡规划居住用地专题统计分析系统的设计与建设

以哈尔滨市"十一五"住宅规划建设为主线,建立哈尔滨市城乡规划居住用地专题统计分析系统。详细介绍系统的总体设计、数据库设计和功能实现等方面的内容。通过系统的分析与研究掌握全市审批居住用地的发展趋势,为今后住宅发展规划提供决策依据。