Article
Engineering, Multidisciplinary
Alma Rodriguez, Octavio Camarena, Erik Cuevas, Itzel Aranguren, Arturo Valdivia-G, Bernardo Morales-Castaneda, Daniel Zaldivar, Marco Perez-Cisneros
Summary: This paper introduces a modified version of Grey Wolf Optimizer, which achieves a better balance, increased accuracy, and avoids convergence at local minima through synchronous-asynchronous processing and increasing diversity operations.
APPLIED MATHEMATICAL MODELLING
(2021)
Article
Computer Science, Interdisciplinary Applications
Mahdi Shariati, Mohammad Saeed Mafipour, Behzad Ghahremani, Fazel Azarhomayun, Masoud Ahmadi, Nguyen Thoi Trung, Ali Shariati
Summary: The study introduces a novel hybrid ELM-GWO model to predict the compressive strength of concrete with partial replacements for cement. The results demonstrate that combining the ELM model with GWO can efficiently improve performance, leading to superior performance indices compared to other models.
ENGINEERING WITH COMPUTERS
(2022)
Article
Computer Science, Artificial Intelligence
Mahdis Banaie-Dezfouli, Mohammad H. Nadimi-Shahraki, Zahra Beheshti
Summary: The paper proposes a representative-based grey wolf optimizer (R-GWO) to address the weaknesses of GWO, introducing a search strategy that enhances exploration and diversity. Experimental results demonstrate that R-GWO outperforms competitor algorithms on most benchmark functions and engineering design problems, with an overall effectiveness of 95.4%.
APPLIED SOFT COMPUTING
(2021)
Article
Mathematics
Asit Kumar Das, Debahuti Mishra, Kaberi Das, Pradeep Kumar Mallick, Sachin Kumar, Mikhail Zymbler, Hesham El-Sayed
Summary: This study analyzes the volatility of the crude oil market and proposes a hybrid model based on ELM and IGWO for crude oil price forecasting. The results show that the ELM-IGWO model has better predictive performance and convergence rate.
Article
Computer Science, Interdisciplinary Applications
Mohammad H. Nadimi-Shahraki, Shokooh Taghian, Seyedali Mirjalili, Hoda Zamani, Ardeshir Bahreininejad
Summary: In this article, a variant of the grey wolf optimizer called gaze cues learning-based grey wolf optimizer (GGWO) is proposed to address the issues of premature convergence, local optima trapping, and stagnation in GWO algorithm. The GGWO algorithm combines neighbor gaze cues learning and random gaze cues learning to enhance exploitation ability and diversity, and achieve a balance between exploration and exploitation. Experimental results demonstrate that the GGWO algorithm performs competitively and effectively in solving engineering problems.
JOURNAL OF COMPUTATIONAL SCIENCE
(2022)
Article
Computer Science, Artificial Intelligence
Jianhua Jiang, Ziying Zhao, Yutong Liu, Weihua Li, Huan Wang
Summary: This paper proposes an improved Grey Wolf Optimizer algorithm (DSGWO) to address the issues of poor population diversity and weak global search capability in the original GWO algorithm. DSGWO significantly improves the algorithm's performance through the combination of group-stage competition mechanism and exploration-exploitation balance mechanism, and its applicability and effectiveness are demonstrated through experiments.
KNOWLEDGE-BASED SYSTEMS
(2022)
Article
Computer Science, Artificial Intelligence
Mohammad H. Nadimi-Shahraki, Shokooh Taghian, Seyedali Mirjalili
Summary: An Improved Grey Wolf Optimizer (I-GWO) is proposed in this article to tackle global optimization and engineering design problems by introducing a dimension learning-based hunting (DLH) search strategy. The IGWO algorithm addresses the lack of population diversity, imbalance between exploitation and exploration, and premature convergence seen in the GWO algorithm. Experimental results show that I-GWO is competitive against six other state-of-the-art metaheuristics, demonstrating its efficiency and applicability in engineering design problems.
EXPERT SYSTEMS WITH APPLICATIONS
(2021)
Article
Computer Science, Interdisciplinary Applications
Amir Seyyedabbasi, Farzad Kiani
Summary: This paper introduces two novel meta-heuristic algorithms inspired by the Grey Wolf Optimizer (GWO) algorithm, which are the expanded Grey Wolf Optimizer and the incremental Grey Wolf Optimizer. Both algorithms focus on exploration and exploitation, and their simulated results over 33 benchmark functions show promising solutions for various problems.
ENGINEERING WITH COMPUTERS
(2021)
Article
Thermodynamics
Mehdi Ghalambaz, Reza Jalilzadeh Yengejeh, Amir Hossein Davami
Summary: In this research, the Grey Wolf Optimizer (GWO) was utilized to minimize the energy consumption of an office building in Seattle, with optimal performance achieved using 40 wolves. Compared to other optimization algorithms, GWO efficiently led to excellent optimal solutions.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Computer Science, Information Systems
Wu Lei, Wu Jiawei, Meng Zezhou
Summary: Since its introduction, the Grey Wolf Optimizer (GWO) has been widely used due to its simplicity and applicability. However, the problem of early convergence and inefficient results in GWO variants still persists. To address this, the GWO is integrated with Levy Flight in LFGWO. Experimental results show that LFGWO outperforms other algorithms in terms of average and standard deviation values, demonstrating its performance, stability, and robustness. Additionally, LFGWO is superior in solving real-world problems and IIR challenging model identification.
Article
Engineering, Marine
Fang Wang, Liang Zhao
Summary: This paper discusses the coordinated path planning mission accomplished by collaborative efforts among multiple Autonomous Underwater Vehicles (AUVs). By formulating a sophisticated coordinated path planning model and addressing the optimization problem through the incorporation of a restricted initialization scheme and a multi-objective clustering strategy, the Parallel Grey Wolf Optimizer (P-GWO) is developed, which exhibits strong global searching abilities and a rapid convergence rate, providing an effective solution for underwater missions.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Mohammad H. H. Nadimi-Shahraki, Ebrahim Moeini, Shokooh Taghian, Seyedali Mirjalili
Summary: This paper presents a new algorithm called DI-GWOCD, which is an improved discrete version of the Grey Wolf Optimizer algorithm, for effectively detecting communities in different networks. The algorithm first uses a local search strategy to improve the search ability of the algorithm and then introduces a novel Binary Distance Vector to calculate the distances between the wolves. Experimental results show that DI-GWOCD can detect communities more effectively than other algorithms.
JOURNAL OF BIONIC ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Chuanqi Li, Jian Zhou, Daniel Dias, Yilin Gui
Summary: A novel machine learning model, KELM-GWO, was proposed for predicting rock compressive strength, with the best performance indices. Porosity was identified as the most important parameter for predicting UCS using the mean impact value (MIV) technique.
APPLIED SCIENCES-BASEL
(2022)
Article
Physics, Multidisciplinary
Ahmed Mohamed Helmi, Mohammed A. A. Al-qaness, Abdelghani Dahou, Robertas Damasevicius, Tomas Krilavicius, Mohamed Abd Elaziz
Summary: Human activity recognition (HAR) is crucial in various real-world applications, and a proposed efficient HAR system using lightweight feature selection method called GBOGWO has been developed to enhance classification accuracy. Experimental results show that GBOGWO significantly improves classification accuracy, with an average accuracy of 98%.
Article
Computer Science, Artificial Intelligence
Khaled H. H. Almotairi
Summary: This paper presents a hybrid filter-wrapper method for cancer classification using the multi-filter ensemble (MFE) approach. Three different algorithms based on the grey wolf optimizer (GWO), evolutionary population dynamics (EPD), and two selection mechanisms are introduced to enhance the GWO algorithm performance. Results show that EPD can improve the search capability of GWO in terms of avoiding local optima, exploration, and convergence rate.
NEURAL COMPUTING & APPLICATIONS
(2023)
Article
Mechanics
Yi Ge, Negin Ashrafi, Khaled Oslub, Yousef Zandi, Morteza Gholizadeh, Alibek Issakhov
Summary: This study presents the maximum amplitude, frequency, and low-velocity impact characteristics of angle-ply laminated curved panels under external excitation. The contact force between the impactor and angle-ply laminated curved panel is modeled using Hertz contact theory. The governing equations of the panel and impactor are obtained using Hamilton's principle and first-order shear deformation theory. The time-dependent governing equations are solved using coupled Galerking and Newmark methods. The results show the influence of viscoelastic parameters, young module ratio, laminated layer patterns, and geometry on the free vibration characteristics, as well as the influence of impactor density and young module ratio on indentation, contact force, and indenter velocity.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Nutrition & Dietetics
Angel Roco-Videla, Rodrigo Landabur-Ayala, Nelson Maureira-Carsalade, Mariela Olguin-Barraza
NUTRICION HOSPITALARIA
(2023)
Letter
Nutrition & Dietetics
Angel Roco-Videla, Marcela Caviedes-Olmos, Nelson Maureira-Carsalade, Mariela Olguin-Barraza
NUTRICION HOSPITALARIA
(2023)
Letter
Nutrition & Dietetics
Angel Roco-Videla, Rodrigo Landabur-Ayala, Nelson Maureira-Carsalade, Mariela Olguin-Barraza
NUTRICION HOSPITALARIA
(2023)
Article
Polymer Science
S. Anne Kavitha, R. Krishna Priya, Krishna Prakash Arunachalam, Siva Avudaiappan, Nelson Maureira-Carsalade, Angel Roco-Videla
Summary: This study focuses on extracting and characterizing the novel root fibers of Zea mays plant for potential use in composites. Various tests were conducted to analyze the structural, thermal, elemental, and mechanical properties of both untreated and treated fibers. The results indicate that Zea mays root fibers can be used as effective reinforcement for polymeric composites.
Article
Polymer Science
Kasirajan Rajam Jaya Sheeba, Retnam Krishna Priya, Krishna Prakash Arunachalam, Siva Avudaiappan, Nelson Maureira-Carsalade, Angel Roco-Videla
Summary: The physico-chemical, structural, mechanical and thermal properties of Acacia pennata as a potential reinforcement in polymer composites were characterized in this study. Treatment with sodium acetate improved the quality and thermal stability of the fibers. The fiber's tensile strength and elongation at break also increased after treatment. Due to its lightweight property, Acacia pennata fiber can be suggested as a reinforcement in light-weight applications of polymer composites.
Review
Green & Sustainable Science & Technology
Herbert Sinduja Joseph, Thamilselvi Pachiappan, Siva Avudaiappan, Nelson Maureira-Carsalade, Angel Roco-Videla, Pablo Guindos, Pablo F. Parra
Summary: There have been efforts to use building demolition waste as an alternative aggregate in concrete to decrease the use of natural resources. This study reviews prior research on using recycled aggregate in concrete production, discussing its composition, behavior, and the additives used to enhance its properties. The recommendation is to use up to 30% recycled aggregate in concrete and to add precoated and pozzolanic materials for adequate workability, strength, and durability.
Article
Construction & Building Technology
Nagarajan Divyah, Ramaiah Prakash, Sundaresan Srividhya, Siva Avudaiappan, Pablo Guindos, Nelson Maureira Carsalade, Krishna Prakash Arunachalam, Ehsan Noroozinejad Farsangi, Angel Roco-Videla
Summary: The steel-concrete composite column is composed of a steel core and surrounding concrete. It provides analysis and design techniques for a new class of laced steel-concrete composite short columns for cyclic axial loads. Lightweight sintered fly ash aggregates, obtained from factories, are used to address the issues of increasing density and depletion of natural resources. Basalt fiber-reinforced normal-weight concrete exhibits the highest ductility among the columns studied.
Article
Construction & Building Technology
Nelson Maureira-Carsalade, Esteban Balboa-Constanzo, Marcelo Sanhueza-Cartes, Claudio Sanhueza, Eduardo Nunez, Angel Roco-Videla
Summary: A novel energy dissipation device is proposed for protecting structures against dynamic loads. The device's conceptual model and its fundamental components are described. Experimental trials and analytical modeling are conducted to validate the device's performance. The results demonstrate the device's potential for effective protection under dynamic loads.
Review
Materials Science, Composites
Abdullahi Haruna Birniwa, Shehu Sa'ad Abdullahi, Mujahid Ali, Rania Edrees Adam Mohammad, Ahmad Hussaini Jagaba, Mugahed Amran, Siva Avudaiappan, Nelson Maureira-Carsalade, Erick I. Saavedra Flores
Summary: This study aims to evaluate the most suitable and widely utilized natural fiber-reinforced polymer composites (NFPCs) and their characteristics, including manufacture, processing, and applications. The study also explores various external treatments of natural fibers and their impact on the properties of NFPCs. Additionally, it investigates the effects of fiber supply, type, and structure, as well as different physical and chemical treatments on the thermal and strength properties of NFPCs. The review uncovers the applications of NFPCs in industries such as automotive and research, highlighting the potential for improving their properties through intentional modification of the fibers.
JOURNAL OF COMPOSITES SCIENCE
(2023)
Article
Materials Science, Composites
Siva Avudaiappan, Patricio Cendoya, Krishna Prakash Arunachalam, Nelson Maureira-Carsalade, Cristian Canales, Mugahed Amran, Pablo F. Parra
Summary: Due to the COVID-19 epidemic, proper management of biomedical waste has become a critical issue globally. This study explores the opportunity of recycling face masks into polypropylene fibers for use in concrete production, offering complete disinfection of the waste material and improving the strength characteristics of the end product. The results show that incorporating mask fibers in concrete significantly enhances compressive and tensile strength, presenting a novel approach for waste disposal and upcycling of trash face masks.
JOURNAL OF COMPOSITES SCIENCE
(2023)
Article
Polymer Science
Abisha Mohan, Retnam Krishna Priya, Krishna Prakash Arunachalam, Siva Avudaiappan, Nelson Maureira-Carsalade, Angel Roco-Videla
Summary: The present study focuses on the usage of Butea parviflora fiber for high end applications. The physical, structural, morphological, mechanical, and thermal properties of the raw and KOH-treated Butea Parviflora plant were analyzed. The treated fibers exhibited improved density, crystallinity, cellulose content, tensile strength, and modulus, as well as reduced hemicelluloses and wax content. The thermal conductivity decreased after alkalization treatment, and the fibers showed good thermal stability.
Article
Engineering, Civil
Aria Ghabussi, Mina Mortazavi, Raghu Betha
Summary: This study focuses on the numerical analysis of curved steel dampers in the hybrid wall panel consisting of cold-formed and hot-rolled squared hollow section frames to improve seismic performance. The results show that the energy dissipation, frame strength, and elastic stiffness are optimal when using a 75 degrees damper with 10 mm thickness and 40 mm depth or a 55 degrees damper with 13 mm thickness and 40 mm depth at the top of the hot-rolled section.
Article
Construction & Building Technology
Esteban Balboa-Constanzo, Nelson Maureira-Carsalade, Frank Sanhueza-Espinoza, Angel Roco-Videla, Marcelo Sanhueza-Cartes, Patricio Arias-Guzman, Cristian Canales
Summary: An improved numerical formulation for a self-centering frictional damper is presented, and its validity is experimentally verified. This damper is designed for seismic protection of industrial storage racks and has shown satisfactory performance. By comparing the experimental results with the numerical predictions, the effectiveness of the improved model is demonstrated.
Article
Construction & Building Technology
Ramon Mata, Eduardo Nunez, Frank Sanhueza, Nelson Maureira, Angel Roco
Summary: This research evaluated the behavior of the web panel zone in steel moment connections under unidirectional and bidirectional cyclic loads. The results showed that bidirectional load can modify the stress and strain distribution in the web panel zone, and increasing the width-to-thickness ratio of the column influences the failure mechanism and plastic incursion in the column. These findings demonstrate the improved performance of the web panel zone under bidirectional cyclic loads.