搜索结果: 1-15 共查到“K-means”相关记录119条 . 查询时间(0.181 秒)
GF-3 SAR IMAGE DESPECKLING BASED ON THE IMPROVED NON-LOCAL MEANS USING NON-SUBSAMPLED SHEARLET TRANSFORM
GF-3 SAR non-subsampled Shearlet transform image despeckling improved Non-Local Means
2018/5/15
GF-3 synthetic aperture radar (SAR) images are rich in information and have obvious sparse features. However, the speckle appears in the GF-3 SAR images due to the coherent imaging system and it hinde...
MONITORING OF HORIZONTAL MOVEMENTS OF HIGH-RISE BUILDINGS AND TOWER TRANSMITTERS BY MEANS OF GROUND-BASED INTERFEROMETRIC RADAR
Ground-based radar interferometry Horizontal movements Deformations High-rise buildings Tower transmitters
2018/5/8
The paper describes possibilities of the relatively new technics – ground based radar interferometry for precise determining of deformation of structures. Special focus on the horizontal movements of ...
中国地质大学科学技术发展院章丽平，张艺馨，唐善玉等计算机学院，IEEE Transactions on Industrial Electronics, 2018, Privacy Protection for E-health Systems by Means of Dynamic Authentication and Three-factor Key Agreement
电子医疗；健康系统；通信安全；认证协议
2021/10/21
2018年，题为"Privacy Protection for E-health Systems Using Dynamic Authentication and Three-factor Key Agreement" 论文刊发在国际权威期刊《IEEE Transactions on Industrial Electronics》上。该文第一作者为中国地质大学计算机学院章丽平副教授。该文对电子医疗...
MULTI-PATCHES IRIS BASED PERSON AUTHENTICATION SYSTEM USING PARTICLE SWARM OPTIMIZATION AND FUZZY C-MEANS CLUSTERING
Particle swarm optimization Fuzzy c-means Taylor’s series expansion weighted mean Hamming distance Iris recognition system
2017/6/19
Locating the boundary parameters of pupil and iris and segmenting the noise free iris portion are the most challenging phases of an automated iris recognition system. In this paper, we have presented ...
一种K-means改进算法的软扩频信号伪码序列盲估计
软扩频信号 伪码序列 K-means聚类 盲估计
2018/5/21
针对软扩频信号因采用了编码技术使得伪码序列难以估计的问题，该文提出一种基于K-means聚类改进的软扩频信号伪码序列盲估计方法。该方法首先以单倍伪码周期的窗长对接收信号进行数据分段以构造观测数据矩阵，其次利用相似测度的理论从观测数据中寻找出K-means算法最优的初始聚类中心点，然后通过搜索平均轮廓系数(Silhouette Coefficient, SC)最大的绝对值以完成伪码集合规模数的估计，...
ADAPTATION OF ROADS TO ALS DATA BY MEANS OF NETWORK SNAKES
snakes networks vector data roads ALS intensity topology consistency
2016/2/29
In the Authoritative Topographic Cartographic Information System (ATKIS®), which is the main public topographic data base in
Germany, the heights and the 2D positions of objects such as roads a...
针对传统隐私保护方法无法应对任意背景知识下恶意分析的问题，提出了分布式环境下满足差分隐私的k-means算法。该算法利用MapReduce计算框架，由主任务控制k-means迭代执行；指派Mapper分任务独立并行计算各数据片中每条记录与聚类中心的距离并标记其属于的聚类；指派Reducer分任务计算同一聚类中的记录数量num和属性向量之和sum，并利用Laplace机制产生的噪声扰动num和sum...
Estimation of a Tax Gap in the Personal Income Tax by Means of National Accounts
Czech Republic National Accounts Personal Income Tax Tax Gap
2016/1/27
The article deals with the estimation of a tax gap incurred by devastation of a tax base and concentrates on undervaluation of incomes from an independent activity. The distortion rate was estimated b...
Usefulness of K-means Method in Detection Corporate Crisis
Assets turnover Average collection period Cluster analysis Current ratio
2016/1/27
Market situation and business environment of construction companies influence significantly decisions met by this group of entities. These decisions are reflected in financial statements, later on. Th...
Tests atternative to higher criticism for high dimensional means under sparsity and column-wise dependence
Large deviation Large p, small n Optimal detection boundary Sparse signal Thresholding Weak dependence
2016/1/20
We consider two alternative tests to the Higher Criticism test of Donoho and Jin (2004) for high dimensional means under the spar-sity of the non-zero means for sub-Gaussian distributed data with unkn...
LIDAR Data Classification Using Hierarchical K-Means Clustering
Remote Sensing LIDAR Hierarchical Classification DTM Multiresolution
2015/12/8
This paper deals with lidar point cloud filtering and classification for modelling the Terrain and more generally for scene segmentation. In this study, we propose to use the well-known K-means cluste...
The Roman City of Uxama Argeala (Soria,Spain) and its Study by Means of Remote Sensing and Digital Cartography
Remote Sensing Image Processing Digital Cartography Roman Town Urbanism
2015/11/12
During the last ten years, we have undertaken a research in order to elaborate a working methodology to study archaeological sites without excavating, by means of using no destructive interventions as...
Ensemble Research: A Means for Immigrant Children to Explore Peer Relationships Through Fotonovela
Explore Peer Relationships Immigrant Children
2015/9/15
This work began with a question about the challenges of nonverbal communication across cultures for both immigrant children in Canadian schools and a community of researchers. The question led to the ...
Being excluded by one means being excluded by all: Perceiving exclusion from inclusive others during one-person social exclusion
Rejection Belonging Cyberball
2015/8/7
Although research has shown that social exclusion undermines well-being, past work has focused
primarily on complete and unambiguous social exclusion in which all people in a situation exclude
one i...
VIRTUAL LANDSCAPES AND EXCURSIONS - INNOVATIVE TOOLS AS A MEANS OF TRAINING IN GEOGRAPHY
interactive web-based e-learning virtual excursion animation visualisation of landscapes real geodata
2015/8/6
VIRTUAL LANDSCAPES AND EXCURSIONS - INNOVATIVE TOOLS AS A MEANS OF TRAINING IN GEOGRAPHY.