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基于逻辑回归函数的加权K-means聚类算法
欧式距离 特征加权的K-means算法 逻辑回归函数 初始聚类中心
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2022/3/15
传统K-means聚类算法通过欧式距离计算样本的相似度，将数据所有的属性特征均平等对待，忽略每个属性特征的不同贡献，导致样本相似度计算的准确率不高。针对这个不足，提出一种特征加权的K-means算法进行优化。首先，运用Softmax和Sigmoid逻辑回归函数计算特征权重，使得加权的欧式距离更能准确地表示样本相似度；其次，优化初始聚类中心选择策略，选择距离较大的K个样本作为初始聚类中心，可有效避免...
AGB Estimation in a Tropical Mountain Forest (TMF) by Means of RGB and Multispectral Images Using an Unmanned Aerial Vehicle (UAV)
forest AGB UAV RGB data multispectral data
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2024/2/4
The present investigation evaluates the accuracy of estimating above-ground biomass (AGB) by means of two different sensors installed onboard an unmanned aerial vehicle (UAV) platform (DJI Inspire I) ...
Towards real-time hidden speaker recognition by means of fully homomorphic encryption
Fully Homomorphic Encryption Neural Networks LWE
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2019/8/30
Securing Neural Network (NN) computations through the use of Fully Homomorphic Encryption (FHE) is the subject of a growing interest in both communities. Among different possible approaches to that to...
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
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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...
铁路运输设备是铁路运输生产的基础，管理单元是铁路运输设备进行设备监控、维修、管理及分析决策的基础对象，是运输设备专业管理与综合应用的基本分析单位.为满足运输设备管理的业务需求，本文在分析铁路运输设备构成的基础上，总结提出铁路运输设备单元划分原则，基于K-means聚类算法开展铁路运输设备单元划分方法研究，并利用该方法对电务通信设备进行单元划分，实践结果证明，该方法比传统的设备类别分类方式更适合设备...
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
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2018/4/18
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 ...
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
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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 ...
Substitution of whole grains for refined grains: a means to avoid excess B-vitamin intake
refined grains excess B-vitamin hole grains
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2018/11/19
We read with interest the article by Karl et al. (1) in a recent issue of the Journal. The authors studied the effects of the substitution of whole grains for refined grains on energy-balance metrics ...
THE SEGMENTATION OF POINT CLOUDS WITH K-MEANS AND ANN (ARTIFICAL NEURAL NETWORK)
Lidar Laser Scanning Photogrammetry Segmentation K-means ANN
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2017/7/13
Segmentation of point clouds is recently used in many Geomatics Engineering applications such as the building extraction in urban areas, Digital Terrain Model (DTM) generation and the road or urban fu...
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
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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 ...
DETERMINING TOOTH OCCLUSAL SURFACE RELIEF INDICATOR BY MEANS OF AUTOMATED 3D SHAPE ANALYSIS
Photogrammetry 3D reconstruction Automation Non-contact measurements Odontometry
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2017/6/19
Determining occlusal surface relief indicator plays an important role in odontometric tooth shape analysis. An analysis of the parameters of surface relief indicators provides valuable information abo...
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
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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，...
Evaluation of forest fire risk using the Apriori algorithm and fuzzy c-means clustering
wildfire association rules fuzzification Ilam Province Iran
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2018/3/6
In this study we evaluated forest fire risk in the west of Iran using the Apriori algorithm and fuzzy c-means (FCM)
clustering. We used twelve different input parameters to model fire risk in Ilam Pr...
Evaluation of transformation from even-aged to selection forest by means of Gini index
stand transformation selection system structural indices forest management
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2018/3/6
We used the Gini index for evaluation of the 40-year transformation to selection forests in the Training Forest Enterprise
Masaryk Forest Křtiny (Czech Republic). The Gini index values for parti...
DYKE MONITORIN BY THE MEANS OF PERSISTENT SCATTERING INTERFEROMETRY AT THE COAST OF NORTHERN GERMANY
SAR-Interferometry Persistent Scattering Interferometry displacement measurement
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2016/11/30
40 percent of the world's population are presently living in coastal areas or along the main rivers. Taking into account that the vulnerability of these areas is increasing due to sea-level rise and c...