基于模糊理论的停车诱导决策方法研究

从停车者的角度出发,建立最优泊位选择模型,通过车位引导系统引导驾驶员合理停车。采用模糊理论方法,把用户停车泊位的主要特性指标进行量化,并根据这些停车泊位的量化值,采用有序加权平均算法,确定停车泊位的隶属度值并进行排序,选取最大隶属度值的泊位为最优泊位。     

Application of image morphology in detecting and extracting the initial welding position

A method of image morphology in detecting and extracting the initial welding position during the autonomous welding process is described. During the process, firstly visual sensing technology is used to capture the straight seam image, and secondly the image edges are detected by morphological corrosion edge detection algorithm, with which can retain the critical information while filter other interferences effectively at the same time. Then morphological processing algorithm is used to conduct the direction of filter by selecting the multidirectional linear structuring elements and finally get the initial weld position point coordinates with the Hough transform. The algorithm is simple, rapid, self-adaptability with high accuracy for interferences except long lines so as to accomplish the entire process of detecting the initial welding position. It can meet the practical demands of automatic guidance for robotic welding.     

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为了给驾驶员提供优质的停车服务、保证停车场的良性供需平衡,本文提出了一个由汽车、停车场和停车信息服务中心组成的智能停车服务环境。基于分布控制的思想,城市被分为若干停车区域,每个区域的停车信息服务中心都是基于FIPA规范和多Agent系统架构实现,并采用了移动Agent、消息队列、Agent容器和Agent执行环境对FIPA规范进行了扩展,充分利用了FIPA良好的交互性和移动Agent的灵活性;无需驾驶员和停车场的干预,多Agent可自动完成停车场查询、停车价格协商、停车位预定、路径导航等功能。此外,还将以时间为驱动的竞价机制引入到系统中,指导分别代表汽车和停车场的Agent进行停车价格的协商。协商算法的仿真结果表明：延长协商的规定时间会增加协商次数,降低协商算法的收敛速度。     

城市交通拥挤的动态组合疏导策略研究

从缓解城市交通拥挤的决策需求出发,提出不同拥挤情况下的多种信号控制与交通诱导的动态组合疏导策略,利用VISSIM模拟方法对提出的多种动态组合疏导策略进行了验证分析.结果表明,信号控制与交通诱导的动态组合策略比两者单独实施的效果更好.     

兰州市主动引导型交通管理策略研究

在既定的交通设施和交通结构水平下,加强交通管理是提高整个交通系统运行效率的重要手段。文章分析了当前兰州市交通管理存在的问题,提出了适合兰州市交通特点的主动引导型交通管理策略。     

Evolutionary trajectory planning of ships in navigation traffic areas

By taking into account certain boundaries of the maneuvering region, along with navigation obstacles and other moving ships, the problem of avoiding collisions in navigation traffic areas was reduced to a dynamic optimization task with static and dynamic constraints. In heavy navigation traffic areas and within coastal zones, correct selection of a ship's speed, when accompanied by the necessary trajectory changes, is a crucial element of safe navigation. This paper presents a modernized version of the evolutionary ship trajectory planning system in which a new parameter was introduced, namely changes of the ship's speed along particular sections of the trajectory. Generally, a safe trajectory is estimated using specialized genetic operators for modifying the trajectory. Here, an additional operator was added to the system that mutates the ship's speed. Sample results present the safe trajectory for a ferry meeting other moving ships and navigational constraints on its way. Received for publication on Dec. 2, 1998; accepted on June 16, 1999     

一种新的鱼雷垂直命中目标的制导方法

该文针对鱼雷采用前视角声纳和旁视声纳识别和跟踪目标,引入了初始导引段跟踪虚拟目标的概念,提出一种新的精确制导方法,给出了导引跟踪和垂直命中弹道的数学模型。经仿真和分析表明：该制导方法对攻击目标的初始态势几乎没有限制,即使目标为逃避攻击进行转向机动,也能垂直命中目标。     

两种激光制导干扰技术仿真研究

介绍了漫反射假目标有源干扰技术和转移式光纤无源干扰技术两种不同激光制导干扰技术的组成和工作原理,对比分析这两种激光制导干扰技术的技术指标。得出两种不同干扰技术的优缺点,为对激光制导武器实施更为有效的干扰提供了理论依据。     

完善上海轨道交通网络导乘系统管理的探讨

在上海轨道交通形成网络后,乘客对导乘信息的需求更为迫切和多元化。目前上海轨道交通网络中已有多种形式的导乘系统为乘客提供多方位的导乘信息服务。介绍了运营服务标识系统、广播系统、乘客信息服务系统、客服中心技术支持系统、智能查询系统、网络运营智能化信息服务系统等,以及上海地铁服务监督热线、运营便民信息(印刷品)、上海地铁网等,并指出了存在的问题。对如何完善上海轨道交通网络运营导乘系统提出了相关建议。     

基于目力观测的红外烟幕干扰效能分析

利用红外成像导弹制导方式和一般的目力光学侦察在原理上的相似之处,从光电对抗的作战效能出发,对红外烟幕对抗红外成像制导导弹的干扰效能进行了简要分析。对研究红外成像制导导弹的干扰技术具有一定的现实意义。