简述提高摩托车活塞环性能配置

在目前我国摩托车的使用条件下,采用高性能配置活塞环是解决早期异常磨损、减少机油消耗和保证发动机性能的有效措施。     

On the goods-activities technical relations in the time allocation theory

In areas like household production and travel choice, time assigned to the different activities plays a key role in addition to consumption as the main variables in utility within the consumer behaviour framework. However, a comprehensive conceptual structure to understand the technological relations between goods consumption and the assignment of time to activities is still lacking. In this paper the problem is reviewed and all possible relations between goods and time are re-formulated. Two general functions are defined and proposed to account for all these relations, forming a new taxonomy for the technical constraints. The resulting consumer behaviour model is used to obtain general expressions for both the value of saving time in constrained activities like travel, and the value of leisure.     

基于多智能体系统的海工装备项目物资仓储管控研究

海洋工程装备项目物资仓储管控具有物资种类繁多、仓储点众多、仓储环境复杂、物资调度任务交错进行等特点。为提高海洋工程装备项目的物资仓储管控效率,减少手工操作工作量,本文分析了仓储活动流程,构建了基于MAS （Multi-agent System,多智能体系统）的海工装备项目物资仓储管控系统框架,并进一步针对库位分配问题提出了具体的协商模型和决策算法,最终采用B/S架构开发了基于MAS的海工装备项目物资仓储管控系统原型。实例验证表明,应用多智能体技术可有效辅助海工装备企业进行智能化物资仓储管控。     

反舰导弹火力分配决策模型的构建及应用研究

反舰导弹是突击敌水面舰船的主要武器,如何根据上级意图和作战任务以及突击兵力所携带的反舰导弹数量,针对敌编队具体编成情况,合理分配导弹,争取最大战果,是在计划组织与实施反舰作战时必须解决的首要问题。在构建反舰导弹火力分配决策实用模型的基础上,利用计算机技术、面向对象程序设计方法,研制了反舰导弹火力分配决策软件。在构建模型时,提出了多种毁伤目标价值系数评估方法,它既适用于单兵种又适用于多兵种合同突击敌舰船编队的需要,可为不同型号反舰导弹提供火力分配决策方案。应用研究表明,该模型及其应用软件全面系统地反映了反舰导弹火力分配决策的基本规律,可为战术指挥员提供决策支持。     

动力定位DP-3附加标志在钻井平台上的设计与应用

介绍了在深水半潜钻井平台“海洋石油981”上采用DP-3入级附加标志的动力定位系统的设计情况,包括采用的理由以及对推进器、电力系统、控制系统及电缆走向的设计分析。作为我国在海洋工程重要项目上的首创设计,有较好的指导意义。     

含串补电容电气化铁路馈线故障测距算法

含串联补偿电容的电气化铁路牵引电网线路的电抗一距离关系不是单调的，按常规的电抗查表测距法，每个故障点会对应2个或多个定位点．通过对含串补电容馈线故障模型特性的分析，提出了一个新的判别方法．对不同的故障角和过渡电阻的ATP仿真以及MATLAB程序分析结果验证，该方法能够判断出故障与区间串补电容的相对位置．给出了含2个串补电容的电气化铁路馈线故障分段查表测距算法．     

基于多目标优化的航空器离场时隙控制方法

为了兼顾效率性和公平性,合理利用时隙资源,进行航空器离场时隙分配,根据机场管制运行部门和航空公司的决策目标,以航班正点率、旅客延误时间、延误成本、基尼系数等目标的不同组合为优化目标,建立了3组多目标优化模型.针对机场管制中航空器放行的应用背景,采用改进的人工鱼群算法求解模型.算例仿真结果表明:以航班延误成本和航班正点率为优化目标时,得到2个Pareto解集,与RBS(ration-by-schedule)分配算法相比,航班延误成本减少了52.9%和48.6%,航班正点率提高了62.5%和75.0%;以航班延误成本和旅客延误时间为优化目标时,得到1个可行解,与RBS分配算法相比,航班延误成本和旅客延误时间分别减少了52.9%和37.5%;以公平性和效率性为目标时,随着公平性的增强,效率性减弱.本文的多目标离场时隙控制方法,弥补了现有方法只考虑效率性的缺陷,为管制员提供了更多可供选择的决策方案.     

Simulation optimization of the berth allocation in a container terminal with flexible vessel priority management

ABSTRACT

Solving the berth allocation problem (BAP) in ports is not trivial where the berth resources are limited and various sizes of vessels arrive with dramatically dissimilar loads. Especially in real scenarios, arriving vessels are accepted for a berth with the first come first served (FCFS) priority rule. This study proposes a decision support system coupled with a simulation optimization module based on the swarm-based Artificial Bee Colony optimization algorithm for solving the BAP. The proposed methodology was implemented for the Izmir port in Turkey. To investigate the influences of the vessel priorities on the BAP, four different experimental scenarios based on the single (SQM) and multiple queue models (MQM) were coupled with FCFS and proposed hybrid queue priority (HQP) rule. The results indicated that SQM scenarios were superior to MQM scenarios in a manner of minimizing the average vessel waiting times and the implementation of a dynamic berth allocation strategy for the MQM significantly decreases the vessel waiting times. Results of the SQM also imply that utilization of the HQP approach further minimizes the average vessel waiting times and increases the berth utilization and port throughput without yielding excessive waiting times for the larger vessels compared with the FCFS priority rule.     

公路客运枢纽的班线组织与配置方法初探

针对公路客运枢纽班线配置问题，对班线组织和配置方法进行研究。在考虑公路客运枢纽布局的基础上，探讨了客运班线的组织和配置原则，提出班线组织主要是协调集约化和分散性两种需求。在总体思路的指导下，宏观配置方法结合场站体系和功能定位，提出了各类型场站班线配置策略；以宏观配置策略为指引，微观配置方法通过建立分区客流预测模型，依据各交通小区到各目标客运站的出行时间和最短路原则，确定各客运站对该类班线的市场划分情况，将该类班线的运力分配到各个客运站，使得总出行成本最小。