油船间货油海上过驳海事监管探析

文中专题分析2009年MAI（POL公约附则I修正案“关于防止油轮间海上货油过驳期间造成污染”的履约要求和我国海事监管存在的问题,并提出相应对策建议,以期全面履约和实现对我国管辖海域内的油船间货油过驳作业的有效监管     

新条例实施后港口危险货物作业场所现状

为贯彻新修订的《危险化学品安全管理条例》,对港口危险货物作业场所现状进行分析.阐述危险货物相关概念.阐明危险货物、危险化学品的区别与联系.统计全国现有危险货物码头、库区及堆场,以及移交港口行政管理部门的储罐的数量,为港口行政管理部门进行安全监管提供理论依据.     

桥隧过渡段重载车辆冲击响应分析

考虑车辆的纵向转动与倾覆,将重载车辆通过桥隧过渡段的过程视为一定初始条件下的受迫振动.根据D'Alembert原理,建立了车辆与路面的动力耦合计算模型,并给出振动方程,利用Laplace变换,对车辆的动力响应进行分析,求得车辆各轮胎对路面最大作用力随时间的变化规律.研究了车辆载质量、货物位置、行车速度与差异沉降对汽车动力响应的影响,实测了汽车的加速度,并对计算结果进行了验证.分析结果表明:差异沉降、行车速度以及车辆载质量的增加均使车辆对路面的冲击力增大,影响程度由大到小依次为车辆载质量、差异沉降、行车速度;货物位置对车辆冲击力的影响较小.     

A time series analysis of the dynamic competition between major cargo airports

This paper models the dynamic competition between major cargo airports from the time series perspectives of long-term equilibriums and short-run dynamics. We first apply a unit root test to examine the stationarity of cargo throughput data. Airports are then analysed pairwise by region to test their equilibrium relationships through cointegration analysis. Meanwhile, we also utilise the error correction model to investigate the short-run impacts of cargo traffic between the airports. According to our findings, there are four positive long-term equilibriums, one positive short-run dynamic and three negative short-run dynamics in Asia. In addition, the airports in North America are found to have four positive long-term equilibriums, three negative long-run equilibriums, seven positive short-run impacts and three negative short-run impacts. As these dynamic relationships imply competition between cargo airports, our study can provide airport authorities with the reference to develop their long-term strategies and short-run operational plans.     

一种集成式全功能自动装车系统成套技术及其应用

通过介绍目前港口铁路大宗散装货物装车作业工艺的三种传统方式及其优缺点,重点推介南京港集团新生圩港区采用的一种自主创新的集成式全功能自动装车系统成套技术,与传统装车工艺相比具有高效率、节约成本、节能、环保等特点,推广应用前景非常广阔.     

Modelling heavy vehicle car‐following behaviour in congested traffic conditions

This study develops a car‐following model in which heavy vehicle behaviour is predicted separately from passenger car. Heavy vehicles have different characteristics and manoeuvrability compared with passenger cars. These differences could create problems in freeway operations and safety under congested traffic conditions (level of service E and F) particularly when there is high proportion of heavy vehicles. With increasing numbers of heavy vehicles in the traffic stream, model estimates of the traffic flow could be degrades because existing car‐following models do not differentiate between these vehicles and passenger cars. This study highlighted some of the differences in car‐following behaviour of heavy vehicle and passenger drivers and developed a model considering heavy vehicles. In this model, the local linear model tree approach was used to incorporate human perceptual imperfections into a car‐following model. Three different real world data sets from a stretch of freeway in USA were used in this study. Two of them were used for the training and testing of the model, and one of them was used for evaluation purpose. The performance of the model was compared with a number of existing car‐following models. The results showed that the model, which considers the heavy vehicle type, could predict car‐following behaviour of drivers better than the existing models. Copyright © 2013 John Wiley & Sons, Ltd.     

塔寺岭至新集段大修方案研究

塔寺岭至新集段2003年竣工通车,二级公路标准。经路况调查,该路段病害较严重,路面强度等级大部分为次等,需要大中修。经论证推荐大修方案为：维持原路线的走向与线形指标;路基路面分路段采取不同的大修方案;桥涵、沿线设施进行完善维修,查缺补漏。经计算该方案造价在合理范围内。     

线控转向系统对汽车操纵稳定性的影响

基于MATLAB/Simulink软件建立线控转向系统的动力学模型,分析线控转向系统关键部件——转向电机的转动惯量、阻尼系数、刚度等对汽车操纵稳定性的影响。合理设计线控转向系统转向电机的结构参数,可提高汽车的操纵稳定性。     

高架轨道交通式集装箱码头装卸新工艺与性能评价

提出一种在堆场上部空间进行装卸船水平运输作业和地面进行集疏运水平运输作业的立体交叉式集装箱装卸工艺,以解决两种装卸活动的干扰问题。结合岸边和堆场起重机装卸时间的内禀随机性问题,提出集装箱装卸工艺的评价指标,并对几种集装箱码头装卸工艺进行性能对比。     

油轮PV阀管路防堵装置的设计和应用

在油轮的货仓系统中,通常都装有PV阀(中文名字叫高速压力-真空阀),以便油轮在装卸过程中和营运过程中起到保护货仓的作用,以防止安全事故的发生。但在实际过程中,如果有货油进入该阀门或者连接管路后,使有可能使其失效。