Zong Woo Geem | Johns Hopkins University (original) (raw)

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Papers by Zong Woo Geem

Research paper thumbnail of MENet: A Mitscherlich function based ensemble of CNN models to classify lung cancer using CT scans

PloS one, Mar 11, 2024

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Research paper thumbnail of Reptile Search Algorithm (RSA): A nature-inspired meta-heuristic optimizer

Expert Systems With Applications, Apr 1, 2022

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Research paper thumbnail of 지글러-니콜스 계단응답기법기반의 하모니서치 알고리즘을 적용한 BLDC모터의 PID속도제어

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Research paper thumbnail of Optimal scheduling for maintenance period of generating units using a hybrid scatter‐genetic algorithm

Iet Generation Transmission & Distribution, 2015

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Research paper thumbnail of PSF-HS 알고리즘을 이용한 신발 갑피의 점착제 도포 경로생성

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Research paper thumbnail of Hybrid Heuristic Optimization Methods in Geotechnical Engineering

Many solutions in geotechnical problems are given by the solutions of optimization analysis. In m... more Many solutions in geotechnical problems are given by the solutions of optimization analysis. In many practical engineering problems, the objective function is nonconvex and discontinuous, with the presence of multiple strong local minima, and the classical optimization methods may sometimes be trapped by the local minimum during the analysis. In cases where a strong local minimum is present in the solution domain, the commonly adopted heuristic global optimization method may fail to work properly, which has been seen by the authors. In this chapter, coupled optimization methods developed by the authors are reviewed, which are demonstrated to be suitable for such difficult cases. The mixed optimization algorithm can take the advantage of different optimization algorithms, and it is demonstrated to be effective and efficient in solving a very complicated hydropower problem with a high level of confidence.

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Research paper thumbnail of Comprehensive Evaluation of Machine Learning MPPT Algorithms for a PV System Under Different Weather Conditions

Journal of Electrical Engineering & Technology, Nov 30, 2020

The rapid growth of demand for electrical energy and the depletion of fossil fuels opened the doo... more The rapid growth of demand for electrical energy and the depletion of fossil fuels opened the door for renewable energy; with solar energy being one of the most popular sources, as it is considered pollution free, freely available and requires minimal maintenance. This paper investigates the feasibility of using machine learning (ML) based MPPT techniques, to harness maximum power on a PV system under PSC. In this study, certain contributions to the field of PV systems and ML based systems were made by introducing nine (9) ML based MPPT techniques, by presenting three (3) experiments under different weather conditions. Decision Tree (DT), Multivariate Linear Regression (MLR), Gaussian Process Regression (GPR), Weighted K-Nearest Neighbors (WK-NN), Linear Discriminant Analysis (LDA), Bagged Tree (BT), Naïve Bayes classifier (NBC), Support Vector Machine (SVM) and Recurrent Neural Network (RNN) performances are validated and proved using MATLAB SIMULINK simulation software. The experimental results demonstrated that WK-NN performs significantly better when compared with other proposed ML based algorithms.

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Research paper thumbnail of Special Issue on Advances in Intelligent Systems

Applied sciences, Mar 17, 2023

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Research paper thumbnail of Hibrit HS-Solver optimizasyon yaklaşımı kullanılarak ek klorlama istasyonlarının optimum tasarımı

DOAJ (DOAJ: Directory of Open Access Journals), Jun 1, 2018

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Research paper thumbnail of Power System Stability Enhancement Using Robust FACTS-Based Stabilizer Designed by a Hybrid Optimization Algorithm

Energies, Nov 21, 2022

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Research paper thumbnail of Interval-Type 3 Fuzzy Differential Evolution for Designing an Interval-Type 3 Fuzzy Controller of a Unicycle Mobile Robot

Mathematics, Sep 28, 2022

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Research paper thumbnail of 수자원 공학에 적용된 하모니 서치 알고리즘 리뷰

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Research paper thumbnail of A Novel Human Respiration Pattern Recognition Using Signals of Ultra-Wideband Radar Sensor

Sensors, Jul 30, 2019

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Research paper thumbnail of Interval-Type 3 Fuzzy Differential Evolution for Designing an Interval-Type 3 Fuzzy Controller of a Unicycle Mobile Robot

Mathematics

Recently, interval-type 3 fuzzy systems have begun to appear in different research areas. This ar... more Recently, interval-type 3 fuzzy systems have begun to appear in different research areas. This article outlines a methodology for the parameterization of interval type-3 membership functions using vertical cuts applied to the dynamic parameter adaptation of the differential evolution algorithm and implemented in an interval-type 3 Sugeno controller. This methodology was applied to the dynamic adaptation of the F (mutation) parameter in differential evolution to improve the performance of this method as the generations occur. To test the type-3 fuzzy differential evolution algorithm, the optimal design of a type-3 Sugeno controller was considered. In this case, the parameterization of the type-3 membership functions of this Sugeno fuzzy controller was performed. The experimentation is based on the application of three different noise levels for validation of the efficacy of the method and performing a comparison study with respect to other articles in the literature. The main idea is...

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Research paper thumbnail of The Development of a Suicidal Ideation Predictive Model for Community-Dwelling Elderly Aged >55 Years

Neuropsychiatric Disease and Treatment, Feb 1, 2022

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Research paper thumbnail of Harmony Search-Based Approaches for Fine-Tuning Deep Belief Networks

Springer eBooks, 2023

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Research paper thumbnail of PID Speed Control of BLDC Motor with Harmony Search Algorithm Based on Ziegler-Nichols Step Response Method

Journal of The Korean Institute of Intelligent Systems, Jun 30, 2021

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Research paper thumbnail of Data for: Vanishing Point Detection for Self-Driving Car Using Harmony Search Algorithm

Vanishing Point Detection in an Autonomous Car using Harmony Search and RANSAC algorithms

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Research paper thumbnail of Prediction of suicide among 372,813 individuals under medical check-up

Journal of Psychiatric Research, Dec 1, 2020

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Research paper thumbnail of A novel harmony search based optimization of reinforced concrete biaxially loaded columns

Structural Engineering and Mechanics, Jun 25, 2015

ABSTRACT

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Research paper thumbnail of MENet: A Mitscherlich function based ensemble of CNN models to classify lung cancer using CT scans

PloS one, Mar 11, 2024

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Research paper thumbnail of Reptile Search Algorithm (RSA): A nature-inspired meta-heuristic optimizer

Expert Systems With Applications, Apr 1, 2022

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Research paper thumbnail of 지글러-니콜스 계단응답기법기반의 하모니서치 알고리즘을 적용한 BLDC모터의 PID속도제어

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Research paper thumbnail of Optimal scheduling for maintenance period of generating units using a hybrid scatter‐genetic algorithm

Iet Generation Transmission & Distribution, 2015

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Research paper thumbnail of PSF-HS 알고리즘을 이용한 신발 갑피의 점착제 도포 경로생성

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Hybrid Heuristic Optimization Methods in Geotechnical Engineering

Many solutions in geotechnical problems are given by the solutions of optimization analysis. In m... more Many solutions in geotechnical problems are given by the solutions of optimization analysis. In many practical engineering problems, the objective function is nonconvex and discontinuous, with the presence of multiple strong local minima, and the classical optimization methods may sometimes be trapped by the local minimum during the analysis. In cases where a strong local minimum is present in the solution domain, the commonly adopted heuristic global optimization method may fail to work properly, which has been seen by the authors. In this chapter, coupled optimization methods developed by the authors are reviewed, which are demonstrated to be suitable for such difficult cases. The mixed optimization algorithm can take the advantage of different optimization algorithms, and it is demonstrated to be effective and efficient in solving a very complicated hydropower problem with a high level of confidence.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Comprehensive Evaluation of Machine Learning MPPT Algorithms for a PV System Under Different Weather Conditions

Journal of Electrical Engineering & Technology, Nov 30, 2020

The rapid growth of demand for electrical energy and the depletion of fossil fuels opened the doo... more The rapid growth of demand for electrical energy and the depletion of fossil fuels opened the door for renewable energy; with solar energy being one of the most popular sources, as it is considered pollution free, freely available and requires minimal maintenance. This paper investigates the feasibility of using machine learning (ML) based MPPT techniques, to harness maximum power on a PV system under PSC. In this study, certain contributions to the field of PV systems and ML based systems were made by introducing nine (9) ML based MPPT techniques, by presenting three (3) experiments under different weather conditions. Decision Tree (DT), Multivariate Linear Regression (MLR), Gaussian Process Regression (GPR), Weighted K-Nearest Neighbors (WK-NN), Linear Discriminant Analysis (LDA), Bagged Tree (BT), Naïve Bayes classifier (NBC), Support Vector Machine (SVM) and Recurrent Neural Network (RNN) performances are validated and proved using MATLAB SIMULINK simulation software. The experimental results demonstrated that WK-NN performs significantly better when compared with other proposed ML based algorithms.

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Research paper thumbnail of Special Issue on Advances in Intelligent Systems

Applied sciences, Mar 17, 2023

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Research paper thumbnail of Hibrit HS-Solver optimizasyon yaklaşımı kullanılarak ek klorlama istasyonlarının optimum tasarımı

DOAJ (DOAJ: Directory of Open Access Journals), Jun 1, 2018

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Power System Stability Enhancement Using Robust FACTS-Based Stabilizer Designed by a Hybrid Optimization Algorithm

Energies, Nov 21, 2022

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Interval-Type 3 Fuzzy Differential Evolution for Designing an Interval-Type 3 Fuzzy Controller of a Unicycle Mobile Robot

Mathematics, Sep 28, 2022

Bookmarks Related papers MentionsView impact

Research paper thumbnail of 수자원 공학에 적용된 하모니 서치 알고리즘 리뷰

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A Novel Human Respiration Pattern Recognition Using Signals of Ultra-Wideband Radar Sensor

Sensors, Jul 30, 2019

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Interval-Type 3 Fuzzy Differential Evolution for Designing an Interval-Type 3 Fuzzy Controller of a Unicycle Mobile Robot

Mathematics

Recently, interval-type 3 fuzzy systems have begun to appear in different research areas. This ar... more Recently, interval-type 3 fuzzy systems have begun to appear in different research areas. This article outlines a methodology for the parameterization of interval type-3 membership functions using vertical cuts applied to the dynamic parameter adaptation of the differential evolution algorithm and implemented in an interval-type 3 Sugeno controller. This methodology was applied to the dynamic adaptation of the F (mutation) parameter in differential evolution to improve the performance of this method as the generations occur. To test the type-3 fuzzy differential evolution algorithm, the optimal design of a type-3 Sugeno controller was considered. In this case, the parameterization of the type-3 membership functions of this Sugeno fuzzy controller was performed. The experimentation is based on the application of three different noise levels for validation of the efficacy of the method and performing a comparison study with respect to other articles in the literature. The main idea is...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The Development of a Suicidal Ideation Predictive Model for Community-Dwelling Elderly Aged >55 Years

Neuropsychiatric Disease and Treatment, Feb 1, 2022

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Harmony Search-Based Approaches for Fine-Tuning Deep Belief Networks

Springer eBooks, 2023

Bookmarks Related papers MentionsView impact

Research paper thumbnail of PID Speed Control of BLDC Motor with Harmony Search Algorithm Based on Ziegler-Nichols Step Response Method

Journal of The Korean Institute of Intelligent Systems, Jun 30, 2021

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Data for: Vanishing Point Detection for Self-Driving Car Using Harmony Search Algorithm

Vanishing Point Detection in an Autonomous Car using Harmony Search and RANSAC algorithms

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Prediction of suicide among 372,813 individuals under medical check-up

Journal of Psychiatric Research, Dec 1, 2020

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A novel harmony search based optimization of reinforced concrete biaxially loaded columns

Structural Engineering and Mechanics, Jun 25, 2015

ABSTRACT

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Research paper thumbnail of Comparative Study on Recent Metaheuristic Algorithms in Design Optimization of Cold-Formed Steel Structures

Sustainable construction aims at reducing the environmental impact of buildings on human health a... more Sustainable construction aims at reducing the environmental impact of buildings on human health and natural environment by efficiently using energy, resources and reducing waste and pollution. Building construction has the capacity to make a major contribution to a more sustainable future of our World because this industry is one of the largest contributors to global warming. The use of cold-formed steel framing in construction industry provides sustainable construction which requires less material to carry the same load compare to other materials and reduces amount of waste material at a site. In this study five optimum design algorithms are developed for cold-formed steel frames made of thin-walled sections using the recent metaheuristic techniques. The algorithms considered are firefly, cuckoo search, artificial bee colony with levy flight, biogeography-based optimization and teaching-learning-based optimization algorithms. The design algorithms select the cold-formed thin-walled C-sections listed in AISI-LRFD (American Iron and Steel Institution, Load and Resistance Factor Design) in such a way that the design constraints specified by the code are satisfied and the weight of the steel frame is the minimum. A real size cold-formed steel building is optimized by using each of these algorithms and their performance in attaining the optimum designs is compared.

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