Recently in the field of vehicular communication, there has been a concentration of research on the integration of a vehicle-to-vehicle (V2V) network. With vehicle-to-vehicle (V2V) communication, users can directly ex...
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Recently in the field of vehicular communication, there has been a concentration of research on the integration of a vehicle-to-vehicle (V2V) network. With vehicle-to-vehicle (V2V) communication, users can directly exchange significant information with nearby vehicles. Typically, automobiles tend to travel at higher speeds on highways compared to roads at intersections. As a result, it is necessary to have a reliable system in place that can effectively and securely facilitate communication. In recent times, scientists have developed different methods for distributing information. However, these systems have various issues such as latency, reliability, mobility, and communication cost. Consequently, this results in a lack of dependability for real-time communication. Therefore, this study introduces a novel approach to Federated Learning (FL) by including the chimp optimization algorithm (ChOA). Federated Learning is an approach in the field of machine learning that enables multiple devices or nodes to collaboratively train a model without the need for data exchange. In the area of vehicular communication, utilization of Federated Learning can be employed to develop a predictive model that estimates the trajectory of nearby vehicles by utilizing collected data. The chimp optimization algorithm (ChOA) is designed to improve the model's efficacy. The proposed method aims to enhance the accuracy of the model's predictions regarding the conduct of nearby vehicles, while also reducing the amount of data exchanged between vehicles, by combining Federated Learning and chimpoptimization termed FLECO. This method has the potential to enhance vehicular communication effectiveness and security, while also improving road safety and traffic management. Federated Learning facilitates the group control of a machine learning (ML) system by vehicles through the adjustment of model parameters. To enhance the energy efficiency of the system, the implementation of resource allocation
Recently, emotion analysis and classification of tweets have become a crucial area of research. The Arabic language had experienced difficulties with emotion classification on Twitter(X), needing preprocessing more th...
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Recently, emotion analysis and classification of tweets have become a crucial area of research. The Arabic language had experienced difficulties with emotion classification on Twitter(X), needing preprocessing more than other languages. Emotion detection is a major challenge in Natural Language Processing (NLP), which allows machines to ascertain the emotions expressed in the text. The task includes recognizing and identifying human feelings such as fear, anger, sadness, and joy. The discovered sentiments and feelings expressed in tweets have gained much recognition in recent years. The Arab region has played a substantial role in international politics and the global economy needs to scrutinize the emotions and sentiments in the Arabic language. Lexicon-based and machine-learning techniques are two common models that address the problems of emotion classification. This study introduces a chimp optimization algorithm with a Deep Learning-Driven Arabic Fine-grained Emotion Recognition (COADL-AFER) technique. The presented COADL-AFER technique mainly aims to detect several emotions in Arabic tweets. In addition to its academic significance, the COADL-AFER technique has practical applications in various fields, including enhancing applications of E-learning, aiding psychologists in recognising terrorist performance, improving product quality, and enhancing customer service. The COADL-AFER technique applies the long short-term memory (LSTM) model for emotion detection. Finally, the hyperparameter selection of the LSTM method can be accomplished by COA. The experimental validation of the COADL-AFER system, a crucial step in our research, is verified utilizing the Arabic tweets dataset. The simulation results stated the betterment of the COADL-AFER technique, further reinforcing the reliability of our research.
作者:
Zhang, LiChen, XiaoboJiangsu Univ Technol
Coll Comp Engn Changzhou 213001 Peoples R China Jilin Univ
Key Lab Symbol Computat & Knowledge Engn Minist Educ Changchun 130012 Peoples R China Peoples Bank China
Changzhou City Ctr Branch Changzhou 213001 Jiangsu Peoples R China
Feature selection is a critical component of machine learning and data mining to remove redundant and irrelevant features from a dataset. The chimp optimization algorithm (CHoA) is widely applicable to various optimiz...
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Feature selection is a critical component of machine learning and data mining to remove redundant and irrelevant features from a dataset. The chimp optimization algorithm (CHoA) is widely applicable to various optimization problems due to its low number of parameters and fast convergence rate. However, CHoA has a weak exploration capability and tends to fall into local optimal solutions in solving the feature selection process, leading to ineffective removal of irrelevant and redundant features. To solve this problem, this paper proposes the Enhanced chimp Hierarchy optimizationalgorithm for adaptive lens imaging (ALI-CHoASH) for searching the optimal classification problems for the optimal subset of features. Specifically, to enhance the exploration and exploitation capability of CHoA, we designed a chimp social hierarchy. We employed a novel social class factor to label the class situation of each chimp, enabling effective modelling and optimization of the relationships among chimp individuals. Then, to parse chimps' social and collaborative behaviours with different social classes, we introduce other attacking prey and autonomous search strategies to help chimp individuals approach the optimal solution faster. In addition, considering the poor diversity of chimp groups in the late iteration, we propose an adaptive lens imaging back-learning strategy to avoid the algorithm falling into a local optimum. Finally, we validate the improvement of ALI-CHoASH in exploration and exploitation capabilities using several high-dimensional datasets. We also compare ALI-CHoASH with eight state-of-the-art methods in classification accuracy, feature subset size, and computation time to demonstrate its superiority.
PurposeThe purpose of this paper is to develop an algorithm and computer script for the optimization of permanent magnet synchronous machines with self-starting ***/methodology/approachThe optimization script consists...
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PurposeThe purpose of this paper is to develop an algorithm and computer script for the optimization of permanent magnet synchronous machines with self-starting ***/methodology/approachThe optimization script consists of two independent modules: (a) optimization procedure and (b) a finite element models describing the investigation of line-start permanent magnet synchronous motors (LSPMSM). The proposed modification of the chimp optimization algorithm improves the convergence and reliability of the optimization procedure. The multiobjective compromise function consists of three components describing the functional parameters of the optimized machine. The field-circuit mathematical model of the dynamics operation of the LSPMSM was elaborated in Ansys and consists of: transient electromagnetic field equations, equations describing external electric circuits and mechanical motion *** proposed optimization procedure containing the chimpalgorithm can be applied to the optimal selection of the selected parameters of the various permanent magnet motors. The optimizationalgorithm was modified to obtain better convergence. The proposed modification involves the use of different types of changes in the parameter characteristic of the group of best-adapted individuals in the chimp troop. The developed optimization procedure was adapted to optimization ***/valueThe proposed optimizationalgorithm and optimizing procedure can be successfully applied to solve the design problems of the LSPMSM.
Sentiment analysis is the process of looking through digital text to determine if the emotional tone of a text is positive, negative, or neutral. It helps companies improve their product, but a serious problem arises ...
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Sentiment analysis is the process of looking through digital text to determine if the emotional tone of a text is positive, negative, or neutral. It helps companies improve their product, but a serious problem arises in classifying the polarity of certain texts with information, sentences or features to forecast their opinion. Therefore, sentiment classification should be done using new technology that classifies reviews as positive or negative so that users can make effective decisions. This research paper develops an effective model to classify sentiment using cell phone data. Initially, the Amazon phone document is passed to the BERT tokenization stage to split the acquired reviews. Then, the Aspect Term Extraction (ATE) is applied and the Term Frequency-Inverse Document Frequency (TF-IDF) is extracted as the first output. Afterward, Wordnet ontology features are extricated as the second output. Moreover, features like statistical, sarcasm linguistic, and N-gram features are extracted from BERT tokenization and considered as the third output. Finally, the sentiment is classified by subjecting the obtained three outputs to Random Multimodal Deep Learning (RMDL), which is tuned by Dwarf Mongoose chimpoptimization (DMCO). DMCO is created by the combination of the Dwarf Mongoose optimization (DMO) and the chimp optimization algorithm (ChOA). The developed DMCO-RMDL approach attained high accuracy, True Positive Rate (TPR), True Negative Rate (TNR), precision, recall, and F1-score values of 93%, 92.8%, 92.2%, 91.5%, 94.1%, and 94.8%, respectively.
For improving software maintainability prediction (SMP), an efficient method for SMP is required in early stages of SDLC to avoid higher maintenance costs involved with the software. To address this issue, we have use...
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For improving software maintainability prediction (SMP), an efficient method for SMP is required in early stages of SDLC to avoid higher maintenance costs involved with the software. To address this issue, we have used three metaheuristic algorithms, i.e., chimp optimization algorithm (ChOA), Harris hawks optimization (HHO) and manta ray foraging optimization (MRFO) algorithm. chimp optimization algorithm has two variants: ChOA1 and ChOA2 depending on the dynamic coefficients of h vector. These metaheuristic algorithms are used for artificial neural network (multilayer perceptron) hyperparameters optimization which can be useful for improving the predictive capability of ANN which will then correctly predict software maintainability (change) using various OO metrics. In this study, a novel HCHHMRFO algorithm has been developed to select the best hyperparameters of ANN (multilayer perceptron) to build the model, which can predict software maintainability accurately. Performance evaluation of models developed after hyperparameters tuning with ChOA1, ChOA2, HHO, MRFO, Ensemble of ChOA, HHO and MRFO (ChOA1_HHO_MRFO and ChOA2_HHO_MRFO) is performed using performance indicators including MAE and RMSE. UIMS and QUES datasets have been used to assess this work. Tent map and singer map are the best chaotic maps (in terms of iterations;RMSE;and MAE, respectively) that are used for ANN's hyperparameters initialization on UIMS dataset. Gauss/mouse map and tent map are the best chaotic maps (in terms of iterations;RMSE and MAE, respectively) that are used for ANN's hyperparameters initialization on the QUES dataset. Comparison results suggest that ChOA2_HHO_MRFO Ensemble is found to give better results to tune ANN hyperparameters for SMP for both the datasets, i.e., UIMS and QUES.
Multilevel thresholding is one of the most commonly used methods in image segmentation. However, the exhaustive search methods are costly in determining optimal thresholds and the conventional remora optimization algo...
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Multilevel thresholding is one of the most commonly used methods in image segmentation. However, the exhaustive search methods are costly in determining optimal thresholds and the conventional remora optimizationalgorithm (ROA) is prone to the premature convergence. This paper presents a chimp-inspired remora optimizationalgorithm (HCROA) to search optimal threshold levels, and the cross-entropy is employed as the objective function. In HCROA, the particles' position are adjusted by the chimp optimization algorithm (ChOA) because of its good exploitation ability and sufficient diversity. With this change, HCROA achieves both the intra-group diversity intelligence and a suitable balance between exploration and exploitation. To validate its performance, a series of experiments are performed. First, we test the HCROA's segmentation accuracy by a set of natural gray-scale images with different thresholds. Second, HCROA is implemented for noisy image segmentation to evaluate its robustness. Several reference-based measurements including Peak Signal-to-Noise Ratio (PSNR), Structural Similarity (SSIM), Feature Similarity (FSIM), Quality Index based on Local Variance (QILV), Haar wavelet-based Perceptual Similarity Index (HPSI), Wilcoxon test, and CPU time have been considered for evaluating the proposed method. Additionally, eight well-known predecessors are injected for parallel comparison. The comparison results prove that the suggested method outperforms the existing approaches in terms of accuracy, convergence speed, noise robustness, and efficiency.
The global shift toward solar energy has resulted in the advancement of research into the manufacture of high-performance solar cells. It is critical to accurately model and identify the parameters of solar cells. Num...
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The global shift toward solar energy has resulted in the advancement of research into the manufacture of high-performance solar cells. It is critical to accurately model and identify the parameters of solar cells. Numerous models of solar cells have been presented thus far, including the single-diode, the double-diode, and the three-diode models. Every model contains a number of unidentified parameters, and numerous approaches for determining their optimal values have been published in the literature. The purpose of this article is to propose an efficient optimization technique, dubbed the chimp optimization algorithm (ChOA), for estimating the model parameters of solar networks. The proposed ChOA outperforms state-of-the-art algorithms in terms of conver-gence rate, global search capacity, and durability. To demonstrate the proposed ChOA algorithm's efficiency, it is used to determine the parameters of several photovoltaic modules and solar cells. The result of ChOA is evaluated and compared with ten well-known optimizationalgorithms in the literature. Additionally, the performance of the ChOA algorithm has been evaluated in a practical application for parameter evaluation of three widely-utilized commercial modules, i.e., multi-crystalline (KC200GT), polycrystalline (SW255), and monocrystalline (SM55), under a variety of temperature and irradiance circumstances that result in alterations in the photovoltaic model's parameters. The results confirm the proposed algorithm's robustness and high performance.
Spectrum sensing is a critical function in cognitive radio networks, enabling the identification of available frequency bands without interfering with primary users. To improve the effectiveness of energy detection, w...
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Spectrum sensing is a critical function in cognitive radio networks, enabling the identification of available frequency bands without interfering with primary users. To improve the effectiveness of energy detection, we propose an adaptive double-threshold method that dynamically adjusts the upper and lower thresholds based on the signal-to-noise ratio (SNR) of cognitive nodes. This research introduces a novel framework for determining the optimal weighting coefficients necessary for these threshold adjustments. Specifically, we present the hybrid Whale-chimp optimization algorithm (WCOA), which ensures stable threshold adaptation, mitigates the sensitivity to minor coefficient fluctuations, and keeps thresholds within an optimal range. Furthermore, we integrate the adaptive double-threshold method with a hybrid detection approach combining Energy Detection and Maximum-Minimum Eigenvalue (MME), which is further fine-tuned using the proposed Innovative Hybrid Whale-chimpalgorithm. Our approach effectively addresses the limitations of conventional energy detection methods, particularly under low SNR conditions. Collaborative interactions among cognitive nodes enhance detection accuracy, leading to faster spectrum sensing and improved detection probabilities. The proposed method offers a reliable solution for efficient spectrum sensing while safeguarding the integrity of primary users.
The vibration of flexible towers of wind turbines can cause accidents or even the shutdown of wind turbines from time to time. Establishing a tower vibration prediction model can effectively predict the occurrence of ...
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The vibration of flexible towers of wind turbines can cause accidents or even the shutdown of wind turbines from time to time. Establishing a tower vibration prediction model can effectively predict the occurrence of accidents. Aiming at the problems of low prediction accuracy of the BP neural network and easy to fall into the local optimal solution, the BP neural network is optimized using the chimp optimization algorithm (ChOA). To confirm the algorithm's feasibility, the 120m flexible tower data of a 2 MW wind turbine in a wind farm is simulated and analyzed, and the tower vibration prediction model is used to establish by optimizing the heterogeneous data from multiple sources through correlation analysis under different operating conditions of the wind turbine to find out the correlation variables affecting the vibration of the flexible tower. The results show that the ChOABP neural network has the best prediction effect under the rated wind speed, the root mean square error (RMSE) decreases by 12.1267, and the mean absolute error (MAE) decreases by 9.688, and the error-index decreases by more than the rated wind speed, which proves that the algorithm is better than the optimized BP neural network in rated wind speed.
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