搜索结果: 91-105 共查到“知识库 雷达工程”相关记录1910条 . 查询时间(1.286 秒)
主动防护系统探测雷达的高速多目标配对
主动防护系统 多目标配对 高速目标
2016/3/30
提出了一种基于目标补偿的主动防护系统探测雷达高速多目标配对方法。通过采用点频连续波与负斜率线性调频连续波的组合作为雷达发射信号，由点频差拍信号获得高速目标的多普勒频率， 构造补偿信号，对负斜率线性调频信号的差拍信号进行补偿，对于同一速度的高速目标补偿后得到目标距离。仿真结果验证了该方法的有效性。
结构矢量法的模糊故障树重要度分析
模糊故障树 梯形模糊数 重要度分析 结构矢量
2016/3/6
针对模糊故障树分析中，重要度分析描述复杂、抽象含义不明确以及不利于重要度排序等问题，提出基于结构矢量的重要度分析方法。首先将梯形模糊数抽象为匀质梯形，将梯形模糊数的变化抽象为梯形质心的矢量变化。而后利用质心变化矢量在水平和垂直方向上的分量定义模糊故障树中故障率的变化量、梯形模糊数模糊度的变化量以及故障率的变化率。最后以某型雷达水冷系统故障为顶事件，通过重要度分析验证了所提方法的有效性。
OPERATIONAL MAPPING OF THE ENVIRONMENTAL CONDITION OF RIPARIAN ZONES OVER LARGE REGIONS FROM AIRBORNE LIDAR DATA
Riparian Zones LiDAR Large Spatial Extents Riparian Condition
2016/2/29
Riparian zones maintain water quality, support multiple geomorphic processes, contain significant biodiversity and also maintain the
aesthetics of the landscape. Australian state and national govern...
AUTOMATIC RECONSTRUCED ROOF SHAPES FOR LIDAR STRIP ADJUSTMENT AND QUALITY CONTROL
LIDAR Reconstruction Adjustment Building Point Cloud Quality
2016/2/29
In the recent years, the performance of LiDAR systems was improved by acquisition of the terrain surface with steadily increasing
point densities. However, the main error sources affecting the quali...
TREE CROWN DELINEATION FROM HIGH RESOLUTION AIRBORNE LIDAR BASED ON DENSITIES OF HIGH POINTS
Tree detection tree crown delineation density of high points (DHP) canopy height model (CHM)
2016/2/29
Tree detection and tree crown delineation from Airborne LiDAR has been focusing mostly on utilizing the canopy height model
(CHM). This paper presents a method for individual tree crown delineation ...
ESTIMATING VERTICAL LEAF AREA DENSITY PROFILES OF TREE CANOPIES USING THREE-DIMENSIONAL PORTABLE LIDAR IMAGING
Broad leaf Canopy Leaf area density Lidar Point cloud 3D Voxel
2016/2/29
In this paper, a new method for estimation of vertical leaf area density (LAD) profile of tree canopy using portable scanning lidar is
proposed. In this method, which we refer to as the voxel-based ...
A DECIDIOUS-CONIFEROUS SINGLE TREE CLASSIFICATION AND INTERNAL STRUCTURE DERIVATION USING AIRBORNE LIDAR DATA
LiDAR species classification geometrical analysis bole derivation branch derivation
2016/2/29
This project has two main purposes; the first is to perform deciduous-coniferous classification for 65 trees by using the leaf-on single
flight LiDAR data. It was done by looking at the geometrical ...
OBJECT DETECTION IN AIRBORNE LIDAR DATA FOR IMPROVED SOLAR RADIATION MODELING IN URBAN AREAS
Airborne LiDAR 3D Point Cloud Solar Potential 3D Horizon Segmentation Vegetation
2016/2/29
In times of higher market prices of fossil fuels and to meet the increasingly environmental and economic threads of climate change
renewable energy must play a major role for global energy supply. Th...
NEW INTEGRATION APPROACH OF PHOTOGRAMMETRIC AND LIDAR TECHNIQUES FOR ARCHITECTURAL SURVEYS
Integration Image Edge Matching LIDAR Automation Architecture
2016/2/29
In the last few years, LIDAR and image-matching techniques have been employed in many application fields because of their
quickness in point cloud generation. Nevertheless, these techniques do not a...
VERIFICATION OF A BUILDING DAMAGE ANALYSIS AND EXTENSION TO SURROUNDINGS OF REFERENCE BUILDINGS
Change Detection LIDAR Vegetation Classification Building Disaster Raster Multispectral
2016/2/29
After a disaster not necessarily all buildings in affected areas are damaged. Therefore, a building damage analysis does not only have
to distinguish different damage types. In fact, unchanged build...
LIDAR FILTERING ALGORITHMS FOR URBAN FLOOD APPLICATION: REVIEW ON CURRENT ALGORITHMS AND FILTERS TEST
LiDAR Filtering Algorithm Digital terrain model (DTM) Urban flood modelling Classification Urban Flood
2016/2/29
Digital terrain model (DTM) is one of the important input parameters in urban flood application. This is because it influences the
flow direction, flow velocity, flood extend and flood depth. LiDAR ...
AUTOMATIC ROAD EXTRACTION FROM LIDAR DATA BASED ON CLASSIFIER FUSION IN URBAN AREA
LIDAR Road Extraction Classifier Fusion Classifier selection Genetic Algorithm
2016/2/29
LIDAR is a powerful remote sensing technology for acquisition of 3D information from terrain surface. Algorithms used for LIDAR
data in urban area are used mostly to deal with the 3D points cloud an...
一种适用于大场景圆迹环扫SAR的改进CS成像算法
圆迹环扫ＳＡＲ 距离徙动 二维频谱 线性调频变标
2016/1/15
在宽测绘带圆迹环扫合成孔径雷达（ＣＳＳＡＲ）中，目标斜距表示形式复杂，测绘带内距离徙动（ＲＣＭ）
变化剧烈均给成像处理引入难点。针对上述问题，根据圆迹环扫ＳＡＲ平台的运动特性，使用高阶逼近的方法建立
圆弧曲线模型下的回波信号斜距方程，并以导出的二维频谱高阶近似解析表达式为基础，考虑大场景下的距离徙
动空变问题，对空变的斜距历程进行详细的分析，并提出了一种适用于大场景圆迹环扫ＳＡＲ的改进线性调...
一种多普勒域走动校正的斜视SAR成像算法
合成孔径雷达 线性调频变标 斜视成像
2016/1/15
为了解决时域校正走动带来的方位空变性问题，提出了一种在方位多普勒域走动校正的斜视合成孔
径雷达（ＳＡＲ）成像算法。文中利用级数反演理论，将斜距公式展开至三次项，推导出ＳＡＲ回波信号的两维频谱表
达式。再从两维频谱出发，提出了基于两维频谱匹配滤波的斜视ＳＡＲ成像算法。该算法考虑到距离空变性问题，
提出先在两维频域进行走动校正和相位预滤波，接着在距离多普勒域进行线性频率变标的处理方法，经过距离脉...