利用债券市场促进城市轨道交通融资企新

对目前国内城市轨道交通融资模式和环境进行了分析,在考虑债券的融资特点及国内债券市场现状的基础之上,深刻分析了发行轨道交通企业债券的意义;并结合轨道文通的行业特点和当前实际,总结了轨道交通企业发行债券在操作上的难点,并有针对性地提出了相应的解决方案。     

论完善权力的监督和制约

权力是统治阶级为了维护自身利益而以强制性手段体现出来的国家意志。在我国,权力主要掌握在人民群众利益的代表——中国共产党手中,就其性质而言,它产生于人民并服务于人民。权力本身是一把“双刃剑”,运用得好,可以利党利国利民,造福社会;一旦失控,往往就会产生腐败,遗患社会。要进行社会主义现代化建设,必须要对权力进行监督和制约。     

社区主义:公共伦理建设的新走向

当代中国正处在以城市化为主导的社会转型的关键时期 ,社会出现了种种不协调 ,需要相应价值尺度来引导。而以国家理性为价值尺度的“国家主义”在中国正趋向衰微 ,以个人理性为终极价值尺度的“个人主义”在中国无法植根 ,造成了社会公共伦理的“空场”,从而说明以公共理性为核心 ,以“个人自由加公共利益”为精神实质的“社区主义”作为一种新的社会精神价值取向应时而生 ,适应了中国当代城市化进程的需要     

“海洋石油720”地球物理勘探船总体设计技术特点浅析

“海洋石油720”地球物理勘探船是一艘现代化12缆三维物探船,能够利用声学探测技术原理,借助船载人工震源和信号接收电缆,高效、精确、大面积和高质量地采集海底以下的地质数据。该船型总体设计技术特点包括对物探设备系统的布置、船型优化、重量重心控制、降低水下噪声、拖曳、联动定位和涉及满足最新规范、公约等船舶安全、环保、舒适性问题。目前我国已具备了对该类船型的研发设计能力。     

双燃料型近海供应船开发设计研究

以一艘LNG燃料近海供应船船型的研究开发项目为例,对船舶的总布置方式、动力系统选型、LNG燃料系统架构、危险气体影响区域、变频驱动技术等关键技术进行详细分析,对于船舶的污染物排放和船舶能效指数做了初步计算分析,可以为LNG动力船舶的船型开发提供有益参考。     

Observed and simulated traffic impacts from the 2013 Bay Area Rapid Transit strike

Despite high costs, many cities build public transit to address regional equity, environmental and economic goals. Although public transit accounts for a minority of trips (～5%), the impact is widely felt when service is suspended during a strike through excess road demand and slower journeys. In 2013, Bay Area Rapid Transit (BART) workers participated in two brief strikes, and the resulting traffic conditions illustrate the value of transit to drivers in the San Francisco Bay Area region. This paper tests the impact of rail transit service interruption on freeway traffic conditions using volumes and travel times. During the strike, regional freeway conditions showed negligible change. However, on facilities that parallel BART service, the impacts are as bad as the worst day of a typical week. Conditions on the San Francisco–Oakland Bay Bridge showed significant impacts with travel times and volumes nearly doubling the baseline median values on the worst day.     

Solving the K-shortest paths problem in timetable-based public transportation systems

Finding the K-shortest paths in timetable-based public transportation systems is an important problem in practice. It has three typical variants: the K-earliest arrival problem (K-EAP), the K-shortest travel time problem (K-STTP), and the K-minimum number of transfers problem (K-MNTP). In this article we show that these problems can be solved efficiently by first modeling the timetable information with the time-expanded approach, then applying the Martins and Santos (MS) algorithm. Then we model the timetable information with the time-dependent approach and propose a modified version of the MS algorithm for solving the K-EAP. Experimental results on real-world data show that for K smaller than 100, which is enough for most applications, the execution times of the MS algorithm for the problems in the time-expanded model are less than 100 ms on a server with a 1.86-GHz central processing unit (CPU) and 4 GB of memory. For solving the K-EAP the modified MS algorithm in the time-dependent model is even more efficient (about three times faster for K ≤ 100) than the original algorithm in the time-expanded model. Our results imply the great potential of the MS algorithms in practical transportation service systems.     

人工智能在镇江公交成本控制中的应用研究

近年来,人工智能技术发展迅速,并被广泛应用于不同行业.在公交行业运用人工智能技术进行成本控制,可以使得成本数据核算和分析更加准确,从而提升企业成本管控水平,提高乘客的服务满意度,提升企业的市场竞争力.作为公交企业,镇江公交承担着一定的社会责任,导致其无法通过提高客票收入来缓解经营成本压力.本文以镇江公交为研究对象,从该...     

压力容器的应力腐蚀及控制

应力腐蚀是压力容器腐蚀破坏的重要形式,尤其是这种断裂失效呈脆性断裂的特点,易导致灾难性后果。阐述了压力容器应力腐蚀断裂产生的条件和特征,并从合理选材、降低或消除应力和改善环境等方面提出了控制应力腐蚀断裂的技术措施。     

原油转驳船主推进器基座设计制造与安装技术

针对原油转驳船（Cargo Transfer Vessel，CTV）主推进器设备尺寸大、质量大和安装难度大等问题，设置主推进器基座，用于对艉部结构与主推进器的连接安装。详细研究主推进器基座的设计、制造与安装技术。对主推进器基座进行合理的结构设计，确定有效的焊接工艺和安装流程，可确保基座的结构稳定性和制造与安装的精度。