Based on Vector Quantization (VQ), a Grey-based Competitive Learning Network (GCLN) in the Mean value / Difference value Transform (MDT) domain is proposed. In this paper, the grey theory is applied to a two-layer Modify Competitive Learning Network (MCLN) in order to generate optimal solution for VQ. In accordance with the degree of similarity measures between training vectors and codevectors,...

In this paper, a novel color image hiding technique using spread grey-based competitive Hopfield neural network (SGHNN) and Hadamard Transform (HT) digital watermarking is proposed. The goal is to offer secure communications in the internet through compress the original color image and embedded into another disguise color image. Our method includes a spread-unsupervised competitive Hopfield neu...

This paper evaluates the human resource information systems provided by different vendors using two new hybrid multicriteria decision-making methods that require ordinal data as inputs. First, grey-point-allocation full-consistency (Grey-PA-FUCOM) weighting method is proposed. The Grey-PA-FUCOM combines simple point-allocation widely used managers and advanced FUCOM accepted scholars in grey sy...

Demir çelik üretimi, ülke ekonomilerinde önemli göstergelerden biridir. Sanayi gelişimine büyük katkı sağlayan bu sektörde yaşanan gelişmeler refahı ve istihdamı üzerinde etkili sonuçlar doğurmaktadır. Özellikle üretim sektörü sürekliliği reel ekonominin gelişmesine ivme kazandıran demir sektörünün önemi gün geçtikçe artmaktadır. Bu çalışmada BIST Ana Metal Endeksi (XMANA) kapsamında bulunan dö...

The problemof selection and the best option are themain subject of operation research science in decision-making theory. Selection is a process that scrutinizes and investigates several quantitative and qualitative, and most often incompatible, factors. One of the most fundamental management issues in multicriteria selection literature is the multicriteria adoption of the projects portfolio. In...

This paper presents a novel approach to solve the multi-objective optimization problem designing two-stage helical gearbox by applying Taguchi method and grey relation analysis (GRA). The objective of study is identify optimal main design factors that maximize efficiency minimize mass. To achieve that, five factors. including coefficients wheel face width (CWFW) first second stages, allowable c...

As high-level equipment and advanced technologies continue toward sophistication, ultrasonic technology is extensively used in the polishing process of difficult-to-process materials to achieve efficiently smooth surfaces with nanometer roughness. The silicon carbide, an indispensable difficult-to-machine optical material, extremely challenging due its high hardness good wear resistance. To ove...