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location systems
相关语句
  定位系统
    The Analysis of Helicopter Target Location Systems
    直升机目标声定位系统分析
短句来源
    The major research works are divided into five sections, including warship bearings-only tracking maneuver research, warship bearings-only tracking research, multi-warships passive data association research, multi-warships passive location research and the engineering implementation of bearings-only passive location systems.
    研究内容共分五个方面,分别是单舰纯方位无源定位机动研究、单舰纯方位无源定位跟踪研究、多舰无源数据关联研究、多舰纯方位无源定位研究以及舰艇纯方位无源定位系统的工程实现,主要完成了如下的工作:
短句来源
  “location systems”译为未确定词的双语例句
    Study on AOA and Joint Location Method of TDOA and FDOA in Passive Location Systems
    无源系统测向及时差频差联合定位方法研究
短句来源
    In this paper, started with the most elementary probability formula of Fisher matrix for time delay estimation, some properties of the Fisher matrix for time delay, Doppler shift and its hither derivatives joint estimation are exploited by use of Toeplitz matrix chracteristics in passive location systems.
    本文从时延估计的Fisher矩阵的最基本概率表达式入手,利用Toerlitz矩阵性质,对无源定位中时延、多普勒及其更高阶导数联合估计的Fisher矩阵的性质进行分析。
短句来源
    Study on Ambiguity and Non-Solution of 3-Station TDOA Location Systems
    平面三站时差定位中的模糊及无解研究
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  location systems
The accuracy and precision of microseismic event locations were measured, analyzed, and compared for two types of location systems: "anolog" and "digital".
      
Mining-induced microseismic event location errors: Accuracy and precision of two location systems
      
Differences were found in the pheromonally mediated mate location systems of two subspecies of Hemileuca electra, H.
      
The present study shows that the VLF level is determined to a high degree by fairly well defined areas with lightning discharges, which can be localized with automatic lightning location systems or forecasted by the weather services.
      
To date, research involving such systems in the indoor environment has concentrated on the development of cheap, realisable, accurate location systems rather than the continued maintenance of the associated world model needed to derive context.
      
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Passive location and tracking method using multiple measuring station is discussed for a moving target carrying an active emitter. Weighted least square estimation for target location and Kalman filtering for tracking and predication are used in such passive location system. Simulation results show that it is an efficient mathod for emitter location. The location accuracy depends on the number, measuring accuracy and geometry of the stations and the moving emitter trajectories.

本文探讨了在有源干扰环境下利用多个测量站对运动辐射源进行被动定位与跟踪的方法。该无源被动定位系统采用了加权最小二乘法来估计目标位置并用卡尔曼滤波器对目标进行跟踪与预测。计算机仿真结果表明,该系统可对运动辐射源定位,定位精度主要由测量站数目、布局及其测量精度和目标航迹所确定。

This paper presents an algorithm based on TOA(Time of Arrival)and azimuth measure-ment.The location principle and feasibility of the technique are analysed in detail.For some bistatic radar systems in which receivers locate and track 3-D moving targets by means of passive method,it is sometimes difficult to measure elevation angle of targets.Therefore,the algorithm proposed in the paper is clearly of great importance to the practicability of passive location systems.The performance of this algorithm is...

This paper presents an algorithm based on TOA(Time of Arrival)and azimuth measure-ment.The location principle and feasibility of the technique are analysed in detail.For some bistatic radar systems in which receivers locate and track 3-D moving targets by means of passive method,it is sometimes difficult to measure elevation angle of targets.Therefore,the algorithm proposed in the paper is clearly of great importance to the practicability of passive location systems.The performance of this algorithm is evaluated by computer simulation(according to Monte Carlo methods)for typical target paths.

本文提出了一种基于TOA(到达时间)和方位角测量的算法,详细分析了该技术的定位原理和可行性。在某些接收机以被动方法对三维运动目标定位跟踪的双基地雷达系统中,往往难以测量目标的俯仰角,因此本文提出的算法对于双基地被动定位系统的实用性具有很重要的意义。文中通过典型目标航迹的计算机仿真(按照MonteCarlo方法)对算法的性能作了评估。

If the observer's trajectory is composed of constant velocity segments termed “legs”,we call this trajectory is in “legs” maneuver mode if the location system is observable,we shall say the target motion if,and only if,can be uniquely determined by noise free angle measurements in this paper,the necessary observability conditions for observaer“legs”manuever mode is established,we show that “legs” mode does not always ensure observability.

由多个等速直线运动段组成的观察站运动方式,称为“Legs”机动方式,所谓的纯方位系统是可观测的,是指系统在纯方位观察条件下,能唯一地求解出目标的运动参数。讨论了“Legs”机动方式,对纯方位目标定位系统可观测性的影响,建立了该模式下系统可观测的必要条件。

 
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