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导航基准
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  navigation reference
     Mumford-Shah Model Based Critical Subset Segmentation from Navigation Reference Images
     基于简化Mumford-Shah模型的导航基准图适配区分割方法
短句来源
     Experiments of segmentation of critical subset from two real navigation reference images show that the computation of the proposed method is not only much faster than that based on the correlation functions, but also gives more reasonable critical areas.
     最后对实际的导航基准图的适配区划分试验表明,该文的适配区分割方法不仅计算速度优于基于相关函数的方法,而且可以获得合理的适配区分布.
短句来源
  “导航基准”译为未确定词的双语例句
     After integrating the Gabor wavelet features and some other parameters as matching area measures,this paper uses the support vector machine(SVM) classification method to transform the estimation of matching probability problem into a classifying one.
     该方法首先运用图像的Gabor小波特征并融合图像的适配性参数,然后结合SVM分类方法将图像内任意区域的匹配概率估计问题转化为待估区域内像素的分类问题,从定量的角度衡量导航基准地图中各个区域的匹配性能.
短句来源
     On the premises of concerning position error,the precise model of GPS-SINS integrated system using GPS double differential phase and double differential phase rate measurements derived in this paper.
     成像传感器和定位子系统是先进机载成像系统的两个重要组成部分。 以东、北、天坐标系为导航基准坐标系 ,建立了 GPS-SINS组合系统状态的数学模型 ,详细推导了利用 GPS双差相位及双差相位率的组合系统观测方程。
短句来源
     A navigation method that the IN method is principal and the CN method is subordinate is presented. The calculation model of navigation standard parameter and navigation parameter is deduced. On the basis of the calculationmodel, the cross guidance equation of the CN system is given.
     提出了以惯性导航为主、天文导航为辅的一种导航方法,推导出该方法对应的导航基准参数计算模型、导航参数计算模型及天文导航系统的横向导引方程。
短句来源
  相似匹配句对
     AI Navigation
     智能导航
短句来源
     Researches on the Realization of Satellite Navigation Coordinate Reference System
     卫星导航系统坐标基准建立问题的研究
短句来源
     The Satellite Configuration of Satellite-TV Navigation System
     利用卫星电视系统进行导航基准站配置
短句来源
     Information Navigation
     信息导航
短句来源
     The Discussion of Voltage Reference and it's Application
     电压基准
短句来源
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  navigation reference
Definition of the look direction u1 from the look angles x and y in the navigation reference coordinate system.
      
Expressed in the navigation reference coordinate system, the look directions are modeling the equivalent pointing direction of each CCD element.
      
Indeed, Lake Baikal is an ideal aerial navigation reference point being 400 miles long and about 35 miles wide.
      
The Devantech IIC Digital Compass is used as an additional navigation reference.
      


On the premises of concerning position error,the precise model of GPS-SINS integrated system using GPS double differential phase and double differential phase rate measurements derived in this paper.Simulation results show that the positioning accuracy of system is centimeter level and the attitude accuracy is better than 10″

成像传感器和定位子系统是先进机载成像系统的两个重要组成部分。以东、北、天坐标系为导航基准坐标系 ,建立了 GPS-SINS组合系统状态的数学模型 ,详细推导了利用 GPS双差相位及双差相位率的组合系统观测方程。仿真结果表明 ,该组合系统能达到厘米级定位精度 ,姿态精度为 1 0″左右 ,可满足先进机载成像系统的要求。

The paper presents the segmentation critical subset method of navigation reference images for path planning of scene based vehicle guidance system. Although correlation matching method is widely used in navigation system, the traditional local robust-matching measures defined directly from correlation functions of the reference image are computationally too time-consuming. So, this paper introduces local robust- , matching measures, i. e., the main peak curvature of correlation function, track ability, feature...

The paper presents the segmentation critical subset method of navigation reference images for path planning of scene based vehicle guidance system. Although correlation matching method is widely used in navigation system, the traditional local robust-matching measures defined directly from correlation functions of the reference image are computationally too time-consuming. So, this paper introduces local robust- , matching measures, i. e., the main peak curvature of correlation function, track ability, feature density, and corresponding fast algorithms. Then in order to segment the critical subset from the local robust-matching measure map, a new critical subset segmentation scheme is proposed based on a simplified Mumford-Shah model, and the critical and non-critical subsets are optimally differentiated by evolving the partial differential equation for Mumford-Shah model. Experiments of segmentation of critical subset from two real navigation reference images show that the computation of the proposed method is not only much faster than that based on the correlation functions, but also gives more reasonable critical areas.

基于景象匹配的飞行器导航数字基准地图中需要划分匹配稳定的区域,以提高导航系统航迹的可靠性.该文首先讨论了描述基准图局部区域匹配稳定性的局部匹配稳健度量指标,据此定义了适配区的概念.常规的基于相关函数局部匹配稳健度量需要大量的计算时间,难以实用化.为此,文中采用了三种可快速计算的匹配稳健度量指标:相关主峰曲率、可跟踪度及特征密度,以及相应的快速算法.同时,引入了一种基于简化Mumford-Shah模型的水平集算法进行适配区划分,通过演化由模型推导出的偏微分方程,就能得到适配区和非适配区的最优划分.最后对实际的导航基准图的适配区划分试验表明,该文的适配区分割方法不仅计算速度优于基于相关函数的方法,而且可以获得合理的适配区分布.

The feasibility of taking strained-wire as navigating datum line of dummy guide-way was analyzed in laser length measurement system, and working principle of the system was presented. In order to eliminate the effects of strained-wire pendency on the navigating precision, a double-strained-wire amending method to the wire was proposed. Experimental results show that the navigating system can follow the track of navigating datum within given precision limitation.

对以张力金属丝作为激光测长系统虚拟导轨导航基准的可行性进行了分析,给出了系统的工作原理。为了克服张力金属丝存在的悬垂对导航精度的影响,提出了一种双张力金属丝法对悬垂量进行修正的方法。通过实验验证,该导航系统可在规定精度范围内实现对导航基准的跟踪。

 
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