Results 261 to 270 of about 27,715 (278)

An extended DEA with more general fuzzy data based upon the centroid formula

Journal of Intelligent & Fuzzy Systems, 2017
The conventional data envelopment analysis (DEA) models for evaluating the relative efficiencies of a set of entities called decision making units (DMUs) converting multiple inputs into multiple outputs are limited to crisp data.
Xiao-Li Meng, Fu-Gui Shi
openaire   +1 more source

Extended centroid of Ore extensions and injective ring endomorphisms

1996
exaly   +2 more sources

A Method to Extend the Estimation Range of the Existing Time-Domain Doppler Centroid Estimators

IEEE Geoscience and Remote Sensing Letters, 2008
In this letter, we use the summation-by-parts formula as a simple tool to extend the estimation range of a certain class of the already existing correlation-based Doppler centroid estimators. The resulting estimators are as robust as the original ones but cover a much larger estimation range of about 50% of the pulse-repetition frequency.
Pakorn Ubolkosold, Stefan Knedlik, Otmar Loffeld   +2 more
openaire   +1 more source

Enhancement of RSSI-Based Localization Using an Extended Weighted Centroid Method With Virtual Reference Node Information

Journal of Electrical Engineering & Technology, 2020
In this paper, an extended weighted centroid localization (EWCL) method for a received signal strength indicator (RSSI)-based localization system is proposed. In the traditional WCL method, an unknown target position is estimated using the actual position of each reference node and RSSI information collected from each reference node based on the ...
Apidet Booranawong, Kiattisak Sengchuai, Nattha Jindapetch, Hiroshi Saito   +3 more
openaire   +1 more source

Research of centroiding algorithms for extended and elongated spot of sodium laser guide star

SPIE Proceedings, 2016
Laser guide stars (LGSs) increase the sky coverage of astronomical adaptive optics systems. But spot array obtained by Shack-Hartmann wave front sensors (WFSs) turns extended and elongated, due to the thickness and size limitation of sodium LGS, which affects the accuracy of the wave front reconstruction algorithm.
Yayun Shao, Yudong Zhang, Kai Wei
openaire   +1 more source

Impact of under-sampling on centroiding methods for wavefront sensing on extended guide sources

Imaging and Applied Optics, 2011
We study the impact of under-sampling on various centroiding methods for wavefront sensing on an elongated spot. Because of its robustness against model errors, correlation appears to be the best option for extreme elongations.
Damien Gratadour, Eric Gendron, Gérard Rousset   +2 more
openaire   +1 more source

Extended Edge-Weighted Centroidal Voronoi Tessellation for Image Segmentation

2014
In this paper, we extend the basic edge-weighted centroidal Voronoi tessellation model (EWCVT) for image segmentation to a new advanced model, namely fuzzy and harmonic EWCVT model. This extended model introduces a fuzzy and harmonic form of clustering energy by combining the image intensity with cluster boundary information.
Kangkang Hu, Yongjie Jessica Zhang
openaire   +1 more source

Extended centroids of skew polynomial rings

Mathematical Journal of Okayama University, 1988
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +3 more sources

Centroid Type-Reduction of Interval Type-2 Fuzzy Logic Systems Based on Extended Binary Algorithms

International Journal of Uncertainty, Fuzziness and Knowledge-Based Systems
In the application of interval type-2 (IT2) Mamdani fuzzy logic systems (FLSs), centroid type-reduction is a commonly used reduction method. This paper introduces two new algorithms, the Binary algorithm and its extended version, the Extended-Binary algorithm, to address the centroid reduction problem in IT2 Mamdani systems.
Nina Ma, Yang Chen
openaire   +1 more source

Extended Centroid Frequency Shift Method for Near-Surface Q Estimation

83rd EAGE Annual Conference & Exhibition, 2022
H. Li, B. Liu, X. Liu, P. Soupios
openaire   +1 more source