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目标船
    Besides,the bubble density and reflectance increased with the wake observation position approaching the target ship.
    同时,随着观测点在尾迹中的位置距目标船的接近,气泡密度不断增大,反射率也随之增强。
    With the development of Radar technic, ARPA (Automatic Radar Plotting Aids) can display directly the course and speed of target ship and get the DCPA and the TCPA of the ship, so it is applied widely.
    随着雷达技术的发展,ARPA(Automatic Radar Plotting Aids自动雷达标绘仪)由于可以直接显示目标船的航向、航速,同时可以直接得到目标船的DCPA和TCPA,因而得到了广泛的应用。
    We make our judgments whether ship being in collision risk or not before, only through observing original data of target ship such as range and bearing and their changes.
    以前,我们只是通过观测到的目标船的原始数据,如距离和方位以及它们的变化情况,判断船舶是否存在碰撞危险,即是否有和目标船发生碰撞的可能。
    First of all, based on the aid of AIS (Automatic Identification System), which can give us the target ship's accurate data and will implement in 2002, we study own ship's relative motion to target vessels, define DCPA and its sign, give mathematic model of collision avoidance, produce the optimal opportunity and action taking of collision avoidance, and obtain a graph of action-taking. The optimal opportunity of collision avoidance is not as a point but as a period of time.
    论文首先在2002年将要开始实施的船舶自动识别系统(AIS)所能提供的准确目标船信息的基础上,研究本船相对于目标船的运动,定义DCPA的大小和符号,推导出船舶避碰数学模型,给出船舶最佳避让行动与时机,得出避让行动曲线图,并且明确最佳避让行动时机不是某个点,而是一个时间段。
    The Shenzhen Maritime Digital Platform is made of nine function modules. It is divided into Port state control (PSC) security check, Flag state control (FSC) security check, ships quality appraisal, assistant business, report forms, the assurance of the target ship, electronic declare management, parameter design and purview management, the Form Design . The course of system implement is given in the thesis.
    深圳海事数字平台分为港口国安全检查(PSC)、船舰国安全检查(FSC)、船舶质量评价、辅助业务、报表、目标船的确定、电子申报管理、参数设计与权限管理、表单设计器9个功能模块,在文中给出了系统开发环境搭建过程,并着重介绍了PSC安全检查与报表统计模块的业务逻辑。
    When a target ship enters the preset warning ring, automatic tracking and supervising begins.
    当目标船进入预先设置的警戒圈时,本系统即自动跟踪监视该目标.
    With every mile shortened between own ship and target ship, the system will predict onco tho DCPA (distance to closest point of approach) and decides if there is any danger of collision.
    自船与目标船每接近1浬,即预报一次目标船与自船的最小会迂距离,并判断一 次有无碰撞危险.
    If the danger of collision still exists when target ship gets into the 3n. m. ring, alarm will be given at once.
    当目标船进入3浬圈时,如果碰撞危险仍未解除,则发出报警信号.
    This paper details the synchronous clock principle. Also described are the relationship between the noise level and the distance, the position of the target ship to the hydrophone and errors of distance measurement.
    本文较详细的介绍了同步钟测距原理,并对在舰船辐射噪声测量中噪声组与距离关系,目标船相对测量水听器的位置,测距误差等进行了描述。
    This article carries out a deep research into the composition of the computer based radar maneuvering simulator and its simulation method. It puts forward the ways and steps to produce coast line echo, the ways to display coastline echo and target ship echo, the ways to simulate sea clutter, and particularly the ways to clip an arc with a circle with respect to the clipping rings with radar PPI.
    对基于微机的雷达操纵模拟器的构成和仿真方法进行了深入地研究,给出了岸线的生成方法和步骤、岸线回波的显示方法、目标船回波的显示方法、海浪回波的模拟方法,并针对雷达中PPI对固标圈的裁剪提出了圆对弧的完整的裁剪方法.
    With the parameters of distance of the target ship, relative bearing, distance of closest point of approach, time to the closest point of approach, speeds ratio and collision angle, the paper proposes a new way for estimating the risk of collisions by applying the comprehensive estimating method of fuzzy mathematics.
    应用模糊数学综合评判理论 ,把目标船的距离、相对方位、最近会遇距离、至最近点时间、船速比、碰角等 6个基本参数作为碰撞危险度的评判参数 ,建立起新的数学模型 ,提出了一种新的船舶碰撞危险度的评判方法
    The 5 factors in seamen's collision avoidance action are the time and the magnitude of course alternation, the relative direction of target ship, the velocity ratio of two ships and the target ship's DCPA. Quantities of seamen's collision avoidance action samples are obtained during seamen training on nautical simulator.
    影响海员避碰行动决策的主要因素有行动时机、行动幅度、目标船的舷角、会遇两船的船速比以及目标船的最后通过距离,在这五个因素中,明确哪些是主要影响因素、哪些是次要影响因素以及五个因素之间的相关性大小对指导海员采取避让操船措施有一定的实际意义.
    An evaluation model for collision risk factor by applying the comprehensive assessment theory of fuzzy mathematics is proposed based on the five factors such as the distance of closest point of approach, time to the closest point of approach, distance of target ship, relative bearing and speed ratio, together with navigational surroundings, visibility and maneuverability etc.
    运用模糊数学的综合评判理论 ,把会遇中目标船的DCPA、TCPA、两船距离、相对方位、船速比 5个因素作为基本评判参数 ,建立碰撞危险度的评价模型 .
    Further, safe sailing speed and operation area are determined according to the distance between target ship and own ship by analyzing the effects of stability and rolling extent ,which provides theory basis for controlling safe speed in the restrict water.
    根据目标船与本船的距离,通过定量分析对周围目标船稳性、横摇幅度的影响,确定本船的安全航行速度及目标船的安全作业区域,对船舶在航道、港口等受限水域安全速度的控制提供理论依据.
    An evaluation system for single target ship collision avoidance is set up.
    建立了一个用于对单目标船避碰操作进行评估的系统。
    Countering the trend of ship movement and the opportunity of avoiding collision in the collision avoidance decision system of ship,this paper makes use of genetic algorithm model to forecast the movement parameter that each target ship relative to this ship at the next moment in real time,and forecast the distance to closest point of attroach(DCPA)and the time to closest point of attroach(TCPA).
    针对船舶避碰决策系统中的船舶运动趋势和避碰时机,应用遗传算法模型,实时预测各目标船相对于本船在下一时刻的运动参数,预估目标船相对于本船的最近会遇距离(DCPA)和最近会遇时间(TCPA)。
    The measurement results show that the differences between the signals of the conductivity and thermal characteristic in the wake area and those in the non-wake area are obvious,and the differences are directly proportional to the vertical temperature gradient in the seawater and the tonnage,draught and speed of a target ship.
    实验测量结果表明:水面舰船气泡尾流区的电导率信号和热特征信号与非尾流区的信号具有显著差别,尾流区与非尾流区的信号差值与海洋垂直温度梯度的大小、目标船的吨位和吃水深度及航速的大小成正比。
 

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