scholarly journals A Comparison of Soft Computing Methods for the Prediction of Wave Height Parameters

2021 ◽  
Vol 2 (1) ◽  
pp. 31-46 ◽  
Author(s):  
Rifat Tur ◽  
Serbay Yontem
Keyword(s):  
Soft Computing ◽  
Wave Height ◽  
Fuzzy Inference ◽  
Evaluation Criteria ◽  
Computing Methods ◽  
Coastal Structures ◽  
Inference System ◽  
Neuro Fuzzy ◽  
Black Sea Coast ◽  
Soft Computing Methods

In the previous studies on the prediction of wave height parameters, only the significant wave height has been considered as the unknown parameter to be predicted. However, the other wave height parameters, which may be required for the design of coastal structures depending on their importance level, have been neglected. Therefore, in this study, novel soft computing methods were used to predict all wave height parameters required for the design of coastal structures. To this end, wave data were derived from a buoy located in Southwest Black Sea Coast. Then, Multi-layer Perceptron Neural Network (MLPNN) and Adaptive-Neuro Fuzzy Inference System (ANFIS) models were developed to predict wave height parameters. Various input combinations were selected to create seven different sub-models. These sub-models were applied using developed MLPNN and ANFIS models. Accuracy of sub-models were evaluated for each wave height parameters in terms of performance evaluation criteria. The results showed that the wave height parameters predicted by the MLPNN and ANFIS methods are similar and both methods yield results acceptable for design purposes. However, for maximum wave height, Hmax, ANFIS sub-model yields slightly better results.

scholarly journals Estimation of current-induced pile groups scour using a rule-based method

2012 ◽  
Vol 15 (2) ◽  
pp. 516-528 ◽  
Author(s):  
N. Ghaemi ◽  
A. Etemad-Shahidi ◽  
B. Ataie-Ashtiani
Keyword(s):  
Soft Computing ◽  
Fuzzy Inference ◽  
Computing Methods ◽  
Accurate Estimation ◽  
Scour Depth ◽  
Pile Groups ◽  
Empirical Formulas ◽  
Inference System ◽  
Acceptable Risks ◽  
Soft Computing Methods

Scour phenomenon around piles could endanger the stability of the structures placed on them. Therefore, an accurate estimation of the scour depth around piles is very important for engineers. Due to the complexity of the interaction between the current, seabed and pile group; prediction of the scour depth is a difficult task and the available empirical formulas have limited accuracy. Recently, soft computing methods such as artificial neural networks (ANN) and adaptive neuro-fuzzy inference system (ANFIS) have been used for the prediction of the scour depth. However, these methods do not give enough insight into the generated models and are not as easy to use as the empirical formulas. In this study, new formulas are given that are compact, accurate and physically sound. In comparison with the other soft computing methods, this approach is more transparent and robust. Comparison between the developed formulas and previous empirical formulas showed the superiority of the developed ones in terms of accuracy. In addition, the given formulas can be easily used by engineers to estimate the scour depth around pile groups. Moreover, in this study, design factors are given for different levels of acceptable risks, which can be useful for design purposes.

A comparative study for estimation of wave height using traditional and hybrid soft-computing methods

2016 ◽  
Vol 75 (7) ◽  
Author(s):  
Chandrabhushan Roy ◽  
Shervin Motamedi ◽  
Roslan Hashim ◽  
Shahaboddin Shamshirband ◽  
Dalibor Petković
Keyword(s):  
Comparative Study ◽  
Soft Computing ◽  
Wave Height ◽  
Computing Methods ◽  
Soft Computing Methods

scholarly journals Multivariate modeling of groundwater quality using hybrid evolutionary soft-computing methods in various climatic condition areas of Iran

2021 ◽  
Author(s):  
Alireza Emadi ◽  
Sarvin Zamanzad-Ghavidel ◽  
Reza Sobhani ◽  
Ali Rashid-Niaghi
Keyword(s):  
Soft Computing ◽  
Mean Squared Error ◽  
Gene Expression Programming ◽  
Groundwater Resources ◽  
Computing Methods ◽  
Climatic Conditions ◽  
Inference System ◽  
Deep Well ◽  
Deep Wells ◽  
Soft Computing Methods

Abstract In the current study, several soft-computing methods including artificial neural networks (ANNs), adaptive neuro-fuzzy inference system (ANFIS), gene expression programming (GEP), and hybrid wavelet theory-GEP (WGEP) are used for modeling the groundwater's electrical conductivity (EC) variable. Hence, the groundwater samples from three sources (deep well, semi-deep well, and aqueducts), located in six basins of Iran (Urmia Lake (UL), Sefid-rud (SR), Karkheh (K), Kavir-Markazi (KM), Gavkhouni (G), and Hamun-e Jaz Murian (HJM)) with various climate conditions, were collected during 2004–2018. The results of the WGEP model with data de-noising showed the best performance in estimating the EC variable, considering all types of groundwater resources with various climatic conditions. The Root Mean Squared Error (RMSE) values of the WGEP model were varied from 162.068 to 348.911, 73.802 to 171.376, 29.465 to 351.489, 118.149 to 311.798, 217.667 to 430.730, and 76.253 to 162.992 μScm−1 in the areas of UL, SR, K, KM, G, and HJM basins. The WGEP model's performance (R-values) for deep wells, semi-deep wells, and aqueducts of the areas of the KM basin associated with the arid steppe cold (Bsk) dominant climate classification was the best. Also, the WGEP's extracted mathematical equations could be used for EC estimating in other basins.

scholarly journals Penentuan Keputusan Pemberian Pinjaman Kredit Usaha Rakyat Menggunakan Metode Adaptive Neuro Fuzzy Inference System (Studi Kasus: BRI Unit A. Yani Bontang)

2020 ◽  
Vol 15 (2) ◽  
pp. 66
Author(s):  
Wahyu Dyan Permana ◽  
Indah Fitri Astuti ◽  
Heliza Rahmania Hatta
Keyword(s):  
Soft Computing ◽  
Membership Function ◽  
Fuzzy Inference System ◽  
Fuzzy Inference ◽  
Inference System ◽  
Neuro Fuzzy

Kredit Usaha Rakyat (KUR) merupakan program pemerintah yang termasuk dalam kelompok program penanggulangan kemiskinan berbasis pemberdayaan usaha ekonomi mikro dan kecil. Bank Rakyat Indonesia (BRI) unit A.Yani Bontang merupakan salah satu bank penyedia pemberian modal KUR yang pada 1 tahun terakhir kredit macet sebesar 1.2 % dari total pinjaman yang didistribusikan. Sistem Pendukung Keputusan (SPK) berbasis soft computing metode ANFIS dapat membantu masalah pemberian pinjaman dengan memberikan alternatif keputusan yang dapat membantu mengefesienkan waktu dalam pengambilan keputusan oleh bank. ANFIS merupakan sistem hybrid yang menggabungkan kelebihan antara sistem fuzzy dan jaringan syaraf tiruan. Variabel input yang digunakan adalah penghasilan, tempat tinggal, jumlah tanggungan, jaminan, serta lama usaha dan output adalah keputusan diterima atau ditolaknya pengajuan pinjaman oleh debitur. Hasil uji coba pelatihan mengunakan jenis membership function yang paling efektif adalah jenis Generalized Bell dengan hasil rata-rata error sebesar 8.3278 x10-7. Metode ANFIS dapat digunakan dalam memberikan keputusan pemberian KUR dengan baik sesuai dengan jenis membership function dan iterasi pada tahap pelatihan jaringan.

scholarly journals Prediction of strength and durability properties of HPC composites using Adaptive Neuro-fuzzy Inference System

2020 ◽  
Vol 184 ◽  
pp. 01102
Author(s):  
P Magudeaswaran. ◽  
C. Vivek Kumar ◽  
Rathod Ravinder
Keyword(s):  
Fuzzy Inference System ◽  
High Performance ◽  
Fuzzy Inference ◽  
High Performance Concrete ◽  
Intelligent System ◽  
Computing Methods ◽  
Inference System ◽  
Performance Requirements ◽  
Neuro Fuzzy ◽  
And Performance

High-Performance Concrete (HPC) is a high-quality concrete that requires special conformity and performance requirements. The objective of this study was to investigate the possibilities of adapting neural expert systems like Adaptive Neuro-Fuzzy Inference System (ANFIS) in the development of a simulator and intelligent system and to predict durability and strength of HPC composites. These soft computing methods emulate the decision-making ability of human expert benefits both the construction industry and the research community. These new methods, if properly utilized, have the potential to increase speed, service life, efficiency, consistency, minimizes errors, saves time and cost which would otherwise be squandered using the conventional approaches.

scholarly journals Performance prediction of construction projects using soft computing methods

2019 ◽  
Vol 46 (7) ◽  
pp. 609-620 ◽  
Author(s):  
Seyedeh Sara Fanaei ◽  
Osama Moselhi ◽  
Sabah T. Alkass
Keyword(s):  
Performance Prediction ◽  
Construction Projects ◽  
Fuzzy Inference ◽  
Performance Indicator ◽  
Relative Weight ◽  
Computing Methods ◽  
Subtractive Clustering ◽  
Inference System ◽  
Neuro Fuzzy ◽  
Project Data

Key performance indicators (KPIs) evaluate different aspects of projects and are used to determine the health status of projects. While there is considerable work on project quantitative performance prediction, less attention, however, has been directed towards qualitative performance prediction. This paper offers a novel framework for qualitatively measuring and predicting six important construction project KPIs using the neuro-fuzzy technique. Neuro-fuzzy models are developed to map the KPIs of three critical project stages to whole project KPIs. Subtractive clustering is utilized to automatically generate initial fuzzy inference system (FIS) models and the artificial neural network (ANN) technique is used to tune the parameters of the initial FIS models. The relative weight of each KPI is determined using a series of computing methods namely, analytic hierarchy process (AHP) and genetic algorithm (GA), to generate the performance indicator (PI). The developed models are validated with real project data showing that the rate of error is reasonably low. The results show that the AHP method is more accurate when compared to the GA method. This framework can be used in building construction projects to help decision-makers evaluate the performance of their projects.

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