公路交通资产管理系统开发关键技术与应用保障

介绍了公路交通资产系统的含义与资产管理过程,并指出开发交通资产管理系统的关键技术,论述了公路交通设施信息准确高效获取、公路交通设施使用性能评估、公路交通资产管理系统决策的实现过程,最后提出了公路交通资产管理系统应用保障措施.     

柴油机电控系统平台开发及应用

介绍了柴油机单体泵电控系统平台化开发内容:ECU硬件开发、上层驱动和应用层开发、底层驱动开发、操作系统及任务调动。提出了V型开发流程、软件CMMI开发方法等规范的开发流程方法。对应用该平台化方法开发的柴油机单体泵电控系统进行试验,验证了该平台开发方法的有效性。     

混合动力汽车汽油机电子节气门模糊智能PID控制

应用英飞凌新一代车用嵌入式控制芯片XC164,开发了基于模糊智能积分PID复合控制算法的混合动力汽车汽油机电子节气门控制系统,为混合动力汽车主控制器和发动机控制之间提供了控制接口。通过对混合动力轿车进行的实际行驶中频繁急加速、急减速过程中电子节气门目标开度和实际控制开度的对比试验,验证了电子节气门控制响应速度快、稳态误差小及控制系统软硬件设计满足混合动力总成对发动机控制的要求。     

An inverse model for calculation of global volume transport from wind and hydrographic data

The P-vector inverse method has been successfully used to invert the absolute velocity from hydrographic data for the extra-equatorial hemispheres, but not for the equatorial region since it is based on the geostrophic balance. A smooth interpolation scheme across the equator is developed in this study to bring together the two already known solutions (P-vectors) for the extra-equatorial hemispheres. This model contains four major components: (a) the P-vector inverse model to obtain the solutions for the two extra-equatorial hemispheres, (b) the objective method to determine the Ψ-values at individual islands, (c) the Poisson equation-solver to obtain the Π-values over the equatorial region from the volume transport vorticity equation, and (d) the Poisson equation-solver to obtain the Ψ and depth-integrated velocity field (U, V) over the globe from the Poisson Ψ-equation. The Poisson equation-solver is similar to the box model developed by Wunsch. Thus, this method combines the strength from both box and P-vector models. The calculated depth-integrated velocity and Ψ-field agree well with earlier studies.     

The foreign non-fuel cargo-traffic demand of the major British seaports in 1980 and 1985, a Markov Chain approach

Projections of the future traffic demand of British seaports are of great importance to port management bodies because of the huge capital investment required for installing modern port facilities. In this paper, the author uses a first order Markov Chain model to forecast the non-fuel cargo traffic demand of the major British seaports in 1980 and 1985.     

静力触探试验确定软粘性土不排水抗剪强度研究

介绍在国内各地多处工程搜集和进行的十字板试验(FVT)、静力触探试验(CPT)确定软粘性土不排水抗剪强度的对比研究,得到若干实用性经验关系式,对软基工程勘察有所裨益。     

湫湖灌区1号过水桥改造工程设计与计算

过水桥在丘陵灌区应用十分广泛,其广泛的应用为丘陵地区跨流域调水提供了便利基础条件。该文介绍湫湖灌区一号过水桥改造情况,为满足过水桥的设计过流能力及减少占地等要求,改造后过水桥的断面及跨度均有所增加。过水桥30m跨度槽身采用后张法预应力技术,通过三维有限元分析计算,表明通过预应力钢筋的施加,可以大大减少运行期的混凝土拉应力,提高了结构的安全度。     

车辆快速起-停控制装置现状研究

发动机怠速起-停装置是实现节能环保的有效途径之一,本文主要研究了几种起停系统的结构、工作原理,并对它们进行了比较,给出了各自的优缺点及适用场合。     

Aggregates cranes handling capacity of container terminals: the port of Kaohsiung

This study looks at the degrees of interference for multiple cranes that work simultaneously at six major container terminals in the port of Kaohsiung. The results confirm that there are different degrees of mutual crane interference among terminals where different operational modes are adapted in the container yards. RTG handling systems show a very high value of aggregate cranes exponent f , with nearly no interference, as long as the number of allocated cranes is no more than the number of truck lanes under each crane. While SC systems reveal a relatively larger degree of mutual interference as the number of cranes increase.