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A GROSS ERROR ELIMINATION METHOD FOR POINT CLOUD DATA BASED ON KD-TREE
Data point cloud Gross error elimination Kd-tree
2018/4/30
Point cloud data has been one type of widely used data sources in the field of remote sensing. Key steps of point cloud data’s pro-processing focus on gross error elimination and quality control. Owin...
VECTOR AND RASTER DATA STORAGE BASED ON MORTON CODE
Vector and raster Integration Morton code Data storage Georaster
2018/4/30
Even though geomatique is so developed nowadays, the integration of spatial data in vector and raster formats is still a very tricky problem in geographic information system environment. And there is ...
MINING CO-LOCATION PATTERNS WITH CLUSTERING ITEMS FROM SPATIAL DATA SETS
Spatial data mining Clustering items Co-location patterns with clustering items Neighbor relationship Praticipation index
2018/4/30
The explosive growth of spatial data and widespread use of spatial databases emphasize the need for the spatial data mining. Co-location patterns discovery is an important branch in spatial data minin...
THIN CLOUD DETECTION METHOD BY LINEAR COMBINATION MODEL OF CLOUD IMAGE
Cloud Detection Image Features Grayscale Texture Linear Model AdaBoost Classifier
2018/4/30
The existing cloud detection methods in photogrammetry often extract the image features from remote sensing images directly, and then use them to classify images into cloud or other things. But when t...
Engineering Analysis of Strong Motion Data from Recent Earthquakes in Sichuan, China
ground motion prediction equations NGA-West2 project code-based spectrum pulse-like ground motions
2018/4/20
Recent earthquakes in the Sichuan Province have contributed to significantly expand the existing ground-motion database for China with new, high-quality ground-motion records. This study investigated ...
穿零问题是时间序列分析中的一个重要研究内容，被广泛应用于语音识别、信号探测等科学研究领域.统计学者已经给出了二阶自回归序列AR（2）的渐进穿零率与一阶渐进相关函数的关系，以及均方渐近穿零率与自回归序列AR（P）的特征根的关系等一系列研究成果.在此基础上，本文引入了自回归序列AR（P）的渐近穿带率（BCR）的概念，建立了序列的2邻点渐近穿带率与一阶渐近相关函数之间的关系.当带宽足够窄时，用2邻点穿带...
采用图像感知哈希的TLD改进算法
TLD KCF 量子遗传算法 感知哈希特征
2018/4/17
为了提高长时间视觉目标跟踪的鲁棒性，提出了一种基于图像感知哈希的TLD改进算法。在改进算法中，跟踪模块使用尺度自适应的KCF跟踪器，检测模块对每个检测窗口提取感知哈希特征，并引入量子遗传算法作为搜索策略加快检测速度。对文中算法在OTB2013的50组视频序列上进行了测试，实验结果表明：其跟踪精度与成功率分别达到了0.784和0.568，较TLD算法分别提高了18.7%和14.2%。并且在处理光照变...
以数据包络分析法（DEA）为研究工具，以国家级科技企业孵化器为研究对象，依据2009 ~ 2014年全国国家级科技企业孵化器投入产出数据，测算连续7年的国家级科技企业孵化器总体运行效率变化趋势，以及四大经济区域、十六个省市国家级科技企业孵化器运行效率在近年的变化趋势和差异。研究表明：2009 ~ 2014年全国国家级科技孵化器整体运行效率较低，且一直处于波动状态，近年来运行效率持续下降，技术无效是...
高管减持、信息环境与社会责任报告印象管理
高管减持 社会责任报告 印象管理 信息环境
2018/4/3
以2010 ~ 2015年披露社会责任报告的重污染行业上市公司为样本，探究高管减持动机对社会责任报告印象管理程度的影响。结果显示：高管减持公司社会责任报告印象管理程度显著高于高管未减持公司；高管减持规模越大，社会责任报告印象管理程度越高，说明高管在减持前会通过社会责任报告印象管理来干扰投资者决策，进而谋求私利。进一步研究发现，上述现象在信息环境较差以及强制披露样本中更为显著。本研究为管理层自利动机...
ACQUISION OF GEOMETRICAL DATA OF SMALL RIVERS WITH AN UNMANNED WATER VEHICLE
Unmanned Water Vehicle Multi-sensor Platform Mobile Mapping Lidar Echo Sounder Flash Flood
2018/3/30
Rivers with small- and medium-scaled catchments have been increasingly affected by extreme events, i.e. flash floods, in the last years. New methods to describe and predict these events are developed ...
研究金属套管对低频电磁场各分量透射信号和反射信号的影响规律对采用过套管电磁感应测井技术监测生产过程中的流体移动具有重要价值.采用柱状成层各向异性介质中的并矢Green函数模拟当发射源在套管内、接收器分别在套管内和套管外时多分量电磁感应的响应，并系统分析了金属套管对透射磁场和反射磁场各主分量的影响规律.计算结果表明，无论是透射场还是反射场，由于所采用的频率较低，金属套管对每个分量信号的影响可以与地层...
USE OF MULTIVARIATE MACHINE LEARNING ANALYSIS TECHNIQUES FOR FLOOD RISK PREVENTION
flood risk data Machine Learning Prediction
2018/3/6
Natural disasters such as flood are regarded to be caused by extreme weather conditions as well as changes in global and regional climate.
The prediction of flood incoming is a key factor to ensure c...
INTER-ANNUAL HEIGHT VARIATIONS OBSERVED BY GPS MEASUREMENTS IN TURKEY
Inter-annual signal Height GPS Climate change
2018/3/6
Turkey is located in Africa-Eurasia-Saudi Arabian plate converged areas with surrounding by the Black Sea and the Mediterranean Sea. Apart from its tectonic conditions, the climate is complexly varyin...
POST-HURRICANE DAMAGE ASSESSMENT ON GREENHOUSE FIELDS WITH USE OF SAR DATA
SAR Tornadoes Disaster Management Greenhouses Remote Sensing SENTİ NEL
2018/3/6
Hurricanes occur without any control of human-being, and it causes large scale loss of life and properties. They happen in the very short timeline and cannot be stopped by the people after it starts t...
FLASH FLOOD MAPPING FOR MOUNTAIN STREAMS USING HIGH-RESOLUTION ALOS-2 DATA
ALOS-2 Capacity building Flood detection Valley floodplain
2018/3/6
This paper introduces a practical way to improve the risk management capacity and resilience of communities by utilizing a prompt flash flood map produced from very high spatial resolution ALOS-2 data...