浅议四电部分工程量清单计价

工程量清单计价方式是国际上通用的一种计价方式。着重说明工程量清单计价的目的与作用,阐述工程量清单计价的特点,分析工程量清单与定额计价规则的不同,对使用工程量清单计价提出建议。     

网络供应链的信息管理系统研究与设计

计算机通信网络技术的迅速发展和应用,使得信息价值链得以形成,并与物流供应链相结合产生了基于信息链的物流供应链,为企业利用和控制信息提供了可能.在对网络供应链信息管理相关理论研究的基础上,设计了一个基于网络供应链的信息管理系统实例,对其中的关键技术和设计特点进行了分析和总结.     

完全信息供应链的协调机制

供应链内部成员冲突的根源来自联盟利润的分配．如果不存在有效的协调机制．长期稳定的合作关系是很难建立和维持的．文中研究了供应链中具有完全信息时的协调机制．当双方具有对称讨价还价能力时。带有订货费用的讨价还价可以协调系统；当讨价能力不同。基于“最优行动博弈”的协商可以使系统达到协调．     

船用燃气轮机发电机组动态性能仿真

基于Matlab/Simulink平台,根据容积惯性法建立某三轴燃气轮机发电机组非线性动态模型,并定制燃气轮机转速调节及发电机励磁系统控制策略,对动态模型进行阶跃形突增突减负荷变工况仿真研究。结果表明动态模型能够有效地对负荷突变工况进行模拟,为船舶电网供电模块的控制系统设计与优化提供模型基础;在变工况过渡过程中,燃气轮机发电机组动态响应特性满足船舶电网供电品质要求。     

国产探照灯多点遥控系统在平台供应船上的应用

根据航道和作业需要,船舶驾驶室顶通常安装有一至数盏探照灯,用于船舶夜航、营救搜索和远距离发送灯光信号通信。某平台供应船(PSV)上配置的带有转台的探照灯可实现远程遥控,但其遥控位置通常设在航行控制台上。若能实现多点遥控探照灯,将便于船员实际作业。文中以该PSV为例,描述国产探照灯多点遥控系统在海工项目上的应用,对今后该类系统的设计选型具有较好的借鉴意义。     

Finding time‐robust fuel‐efficient paths for a call‐taxi in a stochastic city road network

Intra‐city commuting is being revolutionized by call‐taxi services in many developing countries such as India. A customer requests a taxi via phone, and it arrives at the right time and at the right location for the pick‐up. This mode of intra‐city travel has become one of the most reliable and convenient modes of transportation for customers traveling for business and non‐business purposes. The increased number of vehicles on city roads and raising fuel costs has prompted a new type of transportation logistics problem of finding a fuel‐efficient and quickest path for a call‐taxi through a city road network, where the travel times are stochastic. The stochastic travel time of the road network is induced by obstacles such as the traffic signals and intersections. The delay and additional fuel consumption at each of these obstacles are calculated that are later imputed to the total travel time and fuel consumption of a path. A Monte‐Carlo simulation‐based approach is proposed to identify unique fuel‐efficient paths between two locations in a city road network where each obstacle has a delay distribution. A multi‐criteria score is then assigned to each unique path based on the probability that the path is fuel efficient, the average travel time of the path and the coefficient of variation of the travel times of the path. Copyright © 2016 John Wiley & Sons, Ltd.     

Understanding connectivity to international markets: a systematic review

Improving freight connectivity is increasingly a topic at the centre of the international trade and transport policy agendas. An examination of available documents and studies in both the policy-making and the academic fields shows that the concept of freight connectivity has often been defined in different ways, and thus has taken a variety of meanings. This poses the question on what connectivity is and what are its determinants in the context of international trade. We are not aware of any studies that have analysed, in a systematic way, the different perspectives and determinants of freight connectivity so as to increase access to international markets. This paper seeks to fill this gap by performing a systematic literature review that spans disciplines such as Transport Engineering, Transport and International Economics, and Supply Chain Management. The outcome of this examination is a multidisciplinary framework that hopefully will help stakeholders to understand freight connectivity to international markets better, as well as guide future research and analysis in policy-making.     

共同探讨发动机控制单元电源供电系统

从丰田1JZ—G发动机ECU实物上测绘出它的电源供电系统原理电路,讲述其常供电电路、主供电电路的工作过程。介绍丰田2TZ—FE发动机电控单元、丰田LEXESLS400轿车ABS电控单元、日产蓝鸟1．8L发动机电控单元的供电系统电路,以此为基础指出《汽车发动机控制单元电源供电系统分析与探讨》一文中存在的问题。     

基于TDM的出租车供需调控方案研究

交通需求管理（TDM）是能从根本上解决城市交通问题的策略,具有现实的意义。针对成都市出租车供需现状,运用系统的思想对各供需调控方案进行评价比选,分析交通需求管理的必要性并提出针对出租车的交通需求管理的具体措施,可为解决出租车的供需矛盾提供参考。     

二甲醚—柴油混合燃料应用研究

分析了二甲醚物理化学特性,并在增压中冷多缸柴油机上进行了低比例二甲醚与高比例柴油混合燃烧试验研究。结果表明,通过优化供油系统参数,在柴油机上掺烧D30(二甲醚柴油质量分数比3∶7),动力性与原柴油机相当,燃油经济性有所改善,PM排放大幅度下降,NOx在整个负荷范围内得到控制。