Traditional heuristic algorithms often fall into local optima and converge slowly when test case prioritization is addressed in regression testing,making them inadequate for complex real-world scenarios.The Aquila opt...Traditional heuristic algorithms often fall into local optima and converge slowly when test case prioritization is addressed in regression testing,making them inadequate for complex real-world scenarios.The Aquila optimizer,a novel metaheuristic algorithm,demonstrates strong global exploration capability but still faces limitations,including insufficient exploitation capability and slow convergence.To overcome these challenges,a multi-strategy improved chaotic Cauchy inverse cumulative distribution Aquila optimizer for test case prioritization is proposed.First,a logistic–sine–cosine composite chaotic mapping is introduced during the initialization phase of the Aquila optimizer to increase population diversity.Second,the mutated random walk strategy is used to improve global exploration,further enhancing the global search ability of the Aquila optimizer.Moreover,during the narrowed exploration and narrowed exploitation phases,the Cauchy inverse cumulative distribution flight replaces the Lévy flight strategy to reallocate individual positions,strengthening individuals’optimization capability and preventing the algorithm from becoming trapped in local optima.Finally,in the later iteration stage,the specular reflection learning strategy is used to perturb the optimal individual positions and improve the Aquila optimizer’s convergence accuracy and comprehensive optimization performance.Five Java projects were selected from the Defects4J benchmark datasets to conduct comparative experiments with the Aquila optimizer and seven other metaheuristic algorithms.The results demonstrate the effectiveness and superiority of the improved algorithm in test case prioritization.It achieves average improvements of approximately 4.96%in the average percentage of fault detection,3.82%in the average percentage of block coverage,and 5.64%in the average percentage of decision coverage,enabling faster coverage of code blocks and branches.The results provide an efficient priority sorting solution for complex regression testing scenarios.展开更多
This research study aims to enhance the optimization performance of a newly emerged Aquila Optimization algorithm by incorporating chaotic sequences rather than using uniformly generated Gaussian random numbers.This w...This research study aims to enhance the optimization performance of a newly emerged Aquila Optimization algorithm by incorporating chaotic sequences rather than using uniformly generated Gaussian random numbers.This work employs 25 different chaotic maps under the framework of Aquila Optimizer.It considers the ten best chaotic variants for performance evaluation on multidimensional test functions composed of unimodal and multimodal problems,which have yet to be studied in past literature works.It was found that Ikeda chaotic map enhanced Aquila Optimization algorithm yields the best predictions and becomes the leading method in most of the cases.To test the effectivity of this chaotic variant on real-world optimization problems,it is employed on two constrained engineering design problems,and its effectiveness has been verified.Finally,phase equilibrium and semi-empirical parameter estimation problems have been solved by the proposed method,and respective solutions have been compared with those obtained from state-of-art optimizers.It is observed that CH01 can successfully cope with the restrictive nonlinearities and nonconvexities of parameter estimation and phase equilibrium problems,showing the capabilities of yielding minimum prediction error values of no more than 0.05 compared to the remaining algorithms utilized in the performance benchmarking process.展开更多
Oil production estimation plays a critical role in economic plans for local governments and organizations.Therefore,many studies applied different Artificial Intelligence(AI)based meth-ods to estimate oil production i...Oil production estimation plays a critical role in economic plans for local governments and organizations.Therefore,many studies applied different Artificial Intelligence(AI)based meth-ods to estimate oil production in different countries.The Adaptive Neuro-Fuzzy Inference System(ANFIS)is a well-known model that has been successfully employed in various applica-tions,including time-series forecasting.However,the ANFIS model faces critical shortcomings in its parameters during the configuration process.From this point,this paper works to solve the drawbacks of the ANFIS by optimizing ANFIS parameters using a modified Aquila Optimizer(AO)with the Opposition-Based Learning(OBL)technique.The main idea of the developed model,AOOBL-ANFIS,is to enhance the search process of the AO and use the AOOBL to boost the performance of the ANFIS.The proposed model is evaluated using real-world oil produc-tion datasets collected from different oilfields using several performance metrics,including Root Mean Square Error(RMSE),Mean Absolute Error(MAE),coefficient of determination(R2),Standard Deviation(Std),and computational time.Moreover,the AOOBL-ANFIS model is compared to several modified ANFIS models include Particle Swarm Optimization(PSO)-ANFIS,Grey Wolf Optimizer(GWO)-ANFIS,Sine Cosine Algorithm(SCA)-ANFIS,Slime Mold Algorithm(SMA)-ANFIS,and Genetic Algorithm(GA)-ANFIS,respectively.Additionally,it is compared to well-known time series forecasting methods,namely,Autoregressive Integrated Moving Average(ARIMA),Long Short-Term Memory(LSTM),Seasonal Autoregressive Integrated Moving Average(SARIMA),and Neural Network(NN).The outcomes verified the high performance of the AOOBL-ANFIS,which outperformed the classic ANFIS model and the compared models.展开更多
Although the Aquila optimization(AO) algorithm demonstrates promising results in various optimization tasks, it is still easy to fall into local optima, particularly when addressing more intricate problems. To tackle ...Although the Aquila optimization(AO) algorithm demonstrates promising results in various optimization tasks, it is still easy to fall into local optima, particularly when addressing more intricate problems. To tackle this issue, a reinforced tent-enhanced AO(RTEAO) algorithm that incorporates multiple strategic integrations was proposed in this paper. During the initialization phase, a tent chaotic mapping method is employed to enhance population diversity. To update individual positions iteratively, an elite reverse learning strategy and an optimal retention mechanism are employed to circumvent local optima. Experimental evaluations on the CEC2005 test functions demonstrate significant improvements in both convergence speed and accuracy. Furthermore, the RTEAO algorithm showcases remarkable optimization performance in practical applications, specifically in the calibration of a back propagation(BP) neural network for regression analysis on the Boston Housing Price Dataset and Wisconsin Breast Cancer Dataset, thereby affirming its efficacy and versatility in confronting real-world optimization challenges.展开更多
In this study,we present a novel approach to multi-threshold image segmentation using an adaptive method that combines the Ebola Optimization Search Algorithm(EOSA)with the Aquila Optimizer,termed the Integrated Enhan...In this study,we present a novel approach to multi-threshold image segmentation using an adaptive method that combines the Ebola Optimization Search Algorithm(EOSA)with the Aquila Optimizer,termed the Integrated Enhanced Ebola Optimization Search Algorithm(IEOSA).Our approach leverages this integration to produce high-quality segmented images.The IEOSA method introduces two distinct optimization mechanisms to identify optimal solutions.By blending the randomness of the Aquila Optimizer with the capabilities of EOSA,we enhance the exploration potential of the algorithm.Additionally,we incorporate a self-transition learning system within the IEOSA to further boost its performance.To tackle multi-level threshold image segmentation,we apply Kapur’s entropy between-class variance within the IEOSA framework.Our findings show that the IEOSA-based techniques outperform other comparable methods,offering faster convergence and more stable segmentation results.Through comparative analysis using standard test images,we demonstrate that IEOSA achieves higher solution accuracy than other methods.Ultimately,the proposed IEOSA methodologies effectively address multi-level threshold image segmentation challenges,accurately segmenting even the minor errors that are often overlooked in high-resolution images.展开更多
Two-phase optimized machine learning and deep learning models play a key role in enhancing the prediction accuracy of nonlinear time series modeling.This study assesses the performance of a novel two-phase optimized L...Two-phase optimized machine learning and deep learning models play a key role in enhancing the prediction accuracy of nonlinear time series modeling.This study assesses the performance of a novel two-phase optimized Long Short-Term Memory(LSTM)model with integration of Aquila Optimizer(AO)and Wild Horse Optimizer(WHO)in predicting monthly streamflow in a snow-fed catchment.The two-phase optimized LSTM-WHOAO model is compared with single-phase optimized models such as LSTM-GA(Genetic Algorithm),LSTM-GWO(Grey Wolf Optimizer),LSTM-WOA(Whale Optimization Algorithm),LSTM-AO,and LSTM-WHO.The outcomes acquired from the deep learning models were compared using four statistical measures:root-mean-square-error(RMSE),mean absolute error(MAE),Nash-Sutcliffe efficiency(NSE),and coefficient of determination(R²).The LSTM-WHOAO model exhibited the best performance during training,with a mean RMSE of 51.930 and an R² of 0.851.The LSTM-WHO model also demonstrated robust performance,achieving an average RMSE of 53.900 and an R² value of 0.840.Other models,such as LSTM-AO and LSTM-WOA,showed average RMSE of 57.135 and 58.978,respectively,indicating improved performance over the single LSTM model.For the testing stage,the LSTM-WHOAO model remained more effective than other models,with an average RMSE of 70.413 and an R²of 0.755.For peak streamflow events,the LSTM-WHOAO model had the lowest absolute error(201.4%),significantly reducing prediction error compared to other models such as LSTM-GA(333.9%)and LSTM(347.1%).For peak streamflow events,the LSTM-WHOAO model had the lowest absolute error(201.4%),significantly reducing the prediction error compared to other models such as LSTM-GA(333.9%)and LSTM(347.1%).Models that incorporated snow-covered area(SCA)data,such as LSTM-WHOAO and LSTM-WHO,showed lower RMSE and higher R²values,underscoring the importance of considering snow cover dynamics in streamflow forecasting.The LSTM-WHOAO model proved to be the most successful,showing superior results in both the training and testing stages,as well as in peak streamflow predictions.By addressing the unique challenges of snow-fed catchments,this research offers valuable insights,especially into the application of advanced ML techniques in hydrology.展开更多
基金funded by Natural Science Foundation of Fujian Province,grant numbers 2023J01975,2026J0011041,and 2026J0011042Educational research projects of young and middle-aged teachers in Fujian Province,grant number JAT220362Industry-University-Research Project of Longyan Nonferrous Metals Research Institute,grant number PT202502.
摘要Traditional heuristic algorithms often fall into local optima and converge slowly when test case prioritization is addressed in regression testing,making them inadequate for complex real-world scenarios.The Aquila optimizer,a novel metaheuristic algorithm,demonstrates strong global exploration capability but still faces limitations,including insufficient exploitation capability and slow convergence.To overcome these challenges,a multi-strategy improved chaotic Cauchy inverse cumulative distribution Aquila optimizer for test case prioritization is proposed.First,a logistic–sine–cosine composite chaotic mapping is introduced during the initialization phase of the Aquila optimizer to increase population diversity.Second,the mutated random walk strategy is used to improve global exploration,further enhancing the global search ability of the Aquila optimizer.Moreover,during the narrowed exploration and narrowed exploitation phases,the Cauchy inverse cumulative distribution flight replaces the Lévy flight strategy to reallocate individual positions,strengthening individuals’optimization capability and preventing the algorithm from becoming trapped in local optima.Finally,in the later iteration stage,the specular reflection learning strategy is used to perturb the optimal individual positions and improve the Aquila optimizer’s convergence accuracy and comprehensive optimization performance.Five Java projects were selected from the Defects4J benchmark datasets to conduct comparative experiments with the Aquila optimizer and seven other metaheuristic algorithms.The results demonstrate the effectiveness and superiority of the improved algorithm in test case prioritization.It achieves average improvements of approximately 4.96%in the average percentage of fault detection,3.82%in the average percentage of block coverage,and 5.64%in the average percentage of decision coverage,enabling faster coverage of code blocks and branches.The results provide an efficient priority sorting solution for complex regression testing scenarios.
摘要This research study aims to enhance the optimization performance of a newly emerged Aquila Optimization algorithm by incorporating chaotic sequences rather than using uniformly generated Gaussian random numbers.This work employs 25 different chaotic maps under the framework of Aquila Optimizer.It considers the ten best chaotic variants for performance evaluation on multidimensional test functions composed of unimodal and multimodal problems,which have yet to be studied in past literature works.It was found that Ikeda chaotic map enhanced Aquila Optimization algorithm yields the best predictions and becomes the leading method in most of the cases.To test the effectivity of this chaotic variant on real-world optimization problems,it is employed on two constrained engineering design problems,and its effectiveness has been verified.Finally,phase equilibrium and semi-empirical parameter estimation problems have been solved by the proposed method,and respective solutions have been compared with those obtained from state-of-art optimizers.It is observed that CH01 can successfully cope with the restrictive nonlinearities and nonconvexities of parameter estimation and phase equilibrium problems,showing the capabilities of yielding minimum prediction error values of no more than 0.05 compared to the remaining algorithms utilized in the performance benchmarking process.
基金supported by National Natural Science Foundation of China(Grant No.62150410434)National Key Research and Development Program of China(Grant No.2019Y FB1405600)by LIESMARS Special Research Funding.
摘要Oil production estimation plays a critical role in economic plans for local governments and organizations.Therefore,many studies applied different Artificial Intelligence(AI)based meth-ods to estimate oil production in different countries.The Adaptive Neuro-Fuzzy Inference System(ANFIS)is a well-known model that has been successfully employed in various applica-tions,including time-series forecasting.However,the ANFIS model faces critical shortcomings in its parameters during the configuration process.From this point,this paper works to solve the drawbacks of the ANFIS by optimizing ANFIS parameters using a modified Aquila Optimizer(AO)with the Opposition-Based Learning(OBL)technique.The main idea of the developed model,AOOBL-ANFIS,is to enhance the search process of the AO and use the AOOBL to boost the performance of the ANFIS.The proposed model is evaluated using real-world oil produc-tion datasets collected from different oilfields using several performance metrics,including Root Mean Square Error(RMSE),Mean Absolute Error(MAE),coefficient of determination(R2),Standard Deviation(Std),and computational time.Moreover,the AOOBL-ANFIS model is compared to several modified ANFIS models include Particle Swarm Optimization(PSO)-ANFIS,Grey Wolf Optimizer(GWO)-ANFIS,Sine Cosine Algorithm(SCA)-ANFIS,Slime Mold Algorithm(SMA)-ANFIS,and Genetic Algorithm(GA)-ANFIS,respectively.Additionally,it is compared to well-known time series forecasting methods,namely,Autoregressive Integrated Moving Average(ARIMA),Long Short-Term Memory(LSTM),Seasonal Autoregressive Integrated Moving Average(SARIMA),and Neural Network(NN).The outcomes verified the high performance of the AOOBL-ANFIS,which outperformed the classic ANFIS model and the compared models.
摘要Although the Aquila optimization(AO) algorithm demonstrates promising results in various optimization tasks, it is still easy to fall into local optima, particularly when addressing more intricate problems. To tackle this issue, a reinforced tent-enhanced AO(RTEAO) algorithm that incorporates multiple strategic integrations was proposed in this paper. During the initialization phase, a tent chaotic mapping method is employed to enhance population diversity. To update individual positions iteratively, an elite reverse learning strategy and an optimal retention mechanism are employed to circumvent local optima. Experimental evaluations on the CEC2005 test functions demonstrate significant improvements in both convergence speed and accuracy. Furthermore, the RTEAO algorithm showcases remarkable optimization performance in practical applications, specifically in the calibration of a back propagation(BP) neural network for regression analysis on the Boston Housing Price Dataset and Wisconsin Breast Cancer Dataset, thereby affirming its efficacy and versatility in confronting real-world optimization challenges.
基金King Saud University,Saudi Arabia for funding this work through Ongoing Research Funding Program,(ORF-2026-704)supported by the National Natural Science Foundation of China under Grant 62471493+1 种基金partially supported by the Natural Science Foundation of Shandong Province under Grant ZR2023LZH017,ZR2024MF066partially supported by the National Vocational Education Teacher Teaching Innovation Team Characteristic Project under Grant CXTD003.
摘要In this study,we present a novel approach to multi-threshold image segmentation using an adaptive method that combines the Ebola Optimization Search Algorithm(EOSA)with the Aquila Optimizer,termed the Integrated Enhanced Ebola Optimization Search Algorithm(IEOSA).Our approach leverages this integration to produce high-quality segmented images.The IEOSA method introduces two distinct optimization mechanisms to identify optimal solutions.By blending the randomness of the Aquila Optimizer with the capabilities of EOSA,we enhance the exploration potential of the algorithm.Additionally,we incorporate a self-transition learning system within the IEOSA to further boost its performance.To tackle multi-level threshold image segmentation,we apply Kapur’s entropy between-class variance within the IEOSA framework.Our findings show that the IEOSA-based techniques outperform other comparable methods,offering faster convergence and more stable segmentation results.Through comparative analysis using standard test images,we demonstrate that IEOSA achieves higher solution accuracy than other methods.Ultimately,the proposed IEOSA methodologies effectively address multi-level threshold image segmentation challenges,accurately segmenting even the minor errors that are often overlooked in high-resolution images.
基金financially supported by the China National Key R&D Program(No.2024YFC3013300)National Natural Science Foundation of China(No.52479019)+1 种基金Major Basic Research Development Program of the Science and Technology,Qinghai Province(2025-HZ-805)Shenzhen Talent Research Startup Fund.
摘要Two-phase optimized machine learning and deep learning models play a key role in enhancing the prediction accuracy of nonlinear time series modeling.This study assesses the performance of a novel two-phase optimized Long Short-Term Memory(LSTM)model with integration of Aquila Optimizer(AO)and Wild Horse Optimizer(WHO)in predicting monthly streamflow in a snow-fed catchment.The two-phase optimized LSTM-WHOAO model is compared with single-phase optimized models such as LSTM-GA(Genetic Algorithm),LSTM-GWO(Grey Wolf Optimizer),LSTM-WOA(Whale Optimization Algorithm),LSTM-AO,and LSTM-WHO.The outcomes acquired from the deep learning models were compared using four statistical measures:root-mean-square-error(RMSE),mean absolute error(MAE),Nash-Sutcliffe efficiency(NSE),and coefficient of determination(R²).The LSTM-WHOAO model exhibited the best performance during training,with a mean RMSE of 51.930 and an R² of 0.851.The LSTM-WHO model also demonstrated robust performance,achieving an average RMSE of 53.900 and an R² value of 0.840.Other models,such as LSTM-AO and LSTM-WOA,showed average RMSE of 57.135 and 58.978,respectively,indicating improved performance over the single LSTM model.For the testing stage,the LSTM-WHOAO model remained more effective than other models,with an average RMSE of 70.413 and an R²of 0.755.For peak streamflow events,the LSTM-WHOAO model had the lowest absolute error(201.4%),significantly reducing prediction error compared to other models such as LSTM-GA(333.9%)and LSTM(347.1%).For peak streamflow events,the LSTM-WHOAO model had the lowest absolute error(201.4%),significantly reducing the prediction error compared to other models such as LSTM-GA(333.9%)and LSTM(347.1%).Models that incorporated snow-covered area(SCA)data,such as LSTM-WHOAO and LSTM-WHO,showed lower RMSE and higher R²values,underscoring the importance of considering snow cover dynamics in streamflow forecasting.The LSTM-WHOAO model proved to be the most successful,showing superior results in both the training and testing stages,as well as in peak streamflow predictions.By addressing the unique challenges of snow-fed catchments,this research offers valuable insights,especially into the application of advanced ML techniques in hydrology.