TY  - JOUR
EP  - 57
SN  - 2158107X
PB  - Science and Information Organization
N1  - cited By 6
SP  - 47
TI  - Ant colony optimization of interval Type-2 Fuzzy C-Means with subtractive clustering and multi-round sampling for large data
AV  - none
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-85062956308&doi=10.14569%2fIJACSA.2019.0100106&partnerID=40&md5=385c12fbe4f6f5ca9657ed64719eab01
A1  - Qaiyum, S.
A1  - Aziz, I.
A1  - Jaafar, J.
A1  - Wong, A.K.L.
JF  - International Journal of Advanced Computer Science and Applications
VL  - 10
Y1  - 2019///
IS  - 1
N2  - Fuzzy C-Means (FCM) is widely accepted as a clustering technique. However, it cannot often manage different uncertainties associated with data. Interval Type-2 Fuzzy C-Means (IT2FCM) is an improvement over FCM since it can model and minimize the effect of uncertainty efficiently. However, IT2FCM for large data often gets trapped in local optima and fails to find optimal cluster centers. To overcome this challenge an Ant Colony-based Optimization (ACO) is proposed. Another challenge encountered is determining the number of clusters to perform clustering. Subtractive clustering (SC) is an efficient technique to estimate appropriate number of clusters. Though for large datasets the convergence rate of ACO and SC becomes high and thus, it becomes challenging to cluster data and evaluate correct number of clusters. To encounter the challenges of large dataset, Multi-Round Sampling (MRS) technique is proposed. IT2FCM-ACO with SC and MRS technique performs clustering on subsets of data and determines suitable cluster centers and cluster number. The obtained clusters are then extended to the entire dataset. This eliminates the need for IT2FCM to work on the complete dataset. Thus, the objective of this paper is to optimize IT2FCM using ACO algorithm and to estimate the optimal number of clusters using SC while employing MRS to handle the challenges of voluminous data. Results obtained from several clustering evaluation measures shows the improved performance of IT2FCM-ACO-MRS compared to ITFCM-ACO and IT2FCM. Speed up for different sample size of dataset is computed and is found that IT2FCM-ACO-MRS is â??1-5 times faster than IT2FCM and IT2FCM-ACO for medium datasets whereas for large datasets it is reported to be â?? 30-150 times faster. © 2018 The Science and Information (SAI) Organization Limited.
KW  - Ant colony optimization; Artificial intelligence; Large dataset
KW  -  Ant colonies; Fuzzy-c means; Interval type-2 fuzzy; Interval type-2 fuzzy c-mean; Large data; Large datasets; Multi-round sampling; Number of clusters; Optimisations; Subtractive clustering
KW  -  Fuzzy systems
ID  - scholars12218
ER  -