In semiconductor manufacturing, constraints, including multiple scheduling routes, complex production processes, and robotic transportation, particularly bring difficult challenges to production schedules. To address ...
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In semiconductor manufacturing, constraints, including multiple scheduling routes, complex production processes, and robotic transportation, particularly bring difficult challenges to production schedules. To address this issue, we investigated an energy-efficient distributed flexible job shop scheduling problem with robotic transportation. In the considered problem, two objectives, i.e., the maximum completion time and total energy consumption, are minimized simultaneously. First, two mixed integer linear programming models are constructed, including the sequence-based and position-based models. Then, a hybrid algorithm combining the artificial immune algorithm and variable neighborhood search algorithm is proposed. To generate a population with better performance and diversity, five initialization strategies and an active decoding method are designed. In addition, a novel clone mechanism and an improved suppression process are being developed to improve the exploration abilities. Furthermore, two distinct neighborhood structures and two object-oriented local search heuristics are designed to balance exploration and exploitation capabilities. Eventually, the proposed algorithm achieved better performance with the comparison of three other state-of-the-art algorithms with different scale instances.
Improving classification performance is an essential goal for various practical applications. Feature selection has become an important data preprocessing step in machine learning systems. However, many effective meth...
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Improving classification performance is an essential goal for various practical applications. Feature selection has become an important data preprocessing step in machine learning systems. However, many effective methods based on heuristic search strategies have the problem of high running costs. This paper proposes an efficient multiobjective feature selection method based on artificial immune algorithm optimization. It introduces a clone selection algorithm to explore the search space of optimal feature subsets. According to the target requirements of feature selection, combined with biological research results, this method introduces genome shuffling technology and a conditional lethal mutation mechanism to improve the search performance of the algorithm. Experimental comparisons are conducted on 21 benchmark datasets with 17 advanced feature selection methods in terms of classification accuracy, the number of feature subsets, and computational cost. The results show that the algorithm achieves the smallest number of selected features (only 3.26% compared to the lowest) and better average classification accuracy with a much lower average computational cost than others (only 3.62% compared to the lowest).
Aiming at the current problems of high failure rate and low diagnostic efficiency of railway point machines(RPMs)in the railway industry,a short-time method of fault diagnosis is *** the effect of noise on power signa...
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Aiming at the current problems of high failure rate and low diagnostic efficiency of railway point machines(RPMs)in the railway industry,a short-time method of fault diagnosis is *** the effect of noise on power signals in the data acquisition process of the railway centralized signaling monitoring(CSM)system,this study utilizes wavelet threshold denoising to eliminate *** results show that the accuracy of fault diagnosis can be improved by 4.4% after denoising the power *** in order to attain a lighter weight and shorten the running time of the diagnosis model,Mallat wavelet decomposition and artificial immune algorithm are applied to RPM fault ***,voluminous experiments using veritable power signals collected from CSM are introduced,which show that combining these methods can procure higher precision of RPMs and curtail fault diagnosis *** substantiates the validity and feasibility of the presented approach.
The creativity of artistic works encompasses multifaceted elements such as color, shape, and texture, characterized by their complexity and subtlety. Current evaluation methods are predominantly subjective, lacking th...
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The creativity of artistic works encompasses multifaceted elements such as color, shape, and texture, characterized by their complexity and subtlety. Current evaluation methods are predominantly subjective, lacking the ability to objectively and comprehensively capture and quantify these dynamic attributes. To address this limitation, this study proposes an innovative approach for evaluating artistic creativity by integrating an artificial immune algorithm (AIA). Initially, features related to color, shape, and texture are extracted from the artworks, and these feature vectors are input into the AIA as antigens. Subsequently, by defining antigen-antibody matching rules, the features of the artworks are compared with creative reference antibodies generated by the algorithm to derive creativity evaluation results. Finally, leveraging a dynamic adjustment mechanism for bidirectional crossover mutation probabilities, the diversity of the antibody population is optimized through a clonal selection strategy, enhancing the model's adaptability to diverse artistic styles. Experimental results demonstrate that the proposed improved AIA achieves significant enhancements in evaluation metrics, with average Precision and Recall values increasing by 8.45% and 11.21%, respectively, compared to the baseline AIA. This study concludes that the AIA-integrated creativity evaluation method effectively improves the objectivity and accuracy of artistic assessments, offering a novel perspective for the intelligent evaluation of artworks.
Our study centers on the multi-UAV multi-store delivery problem and considers the power problem of the UAV for the charging setup of the UAV. In our study, we developed an optimized mathematical model for the problem ...
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In recent years, with the rapid growth of the digital currency industry, blockchain technology has attracted wide attention, and its research mostly focuses on the protection of economic security and privacy. In order...
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In recent years, with the rapid growth of the digital currency industry, blockchain technology has attracted wide attention, and its research mostly focuses on the protection of economic security and privacy. In order to study the application and development mechanism of currency products, this work investigates the practical application of digital currency products under blockchain technology at the present stage, and analyzes the potential security risks. The artificial immune algorithm (AIA) is an intelligent method to imitate the function of the biological immune system, which provides a new solution for solving complex distributed problems. Firstly, a blockchain digital currency product is proposed based on AIA. Secondly, taking the credit risk of innovation risk in financial currency products as an example, the Diffie-Hellman (DH) with blockchain technology is used. Finally, the generation and optimization of the plan are realized, and an innovative risk plan is proposed for blockchain digital currency products on the basis of AIA. The results show that: (1) The improved AIA implements a guided AIA with adaptive parameter update. (2) The digital signature technology using the DH algorithm has a stronger anti-attack ability than the traditional blockchain digital signature technology. It improves the security of blockchain digital currency. This work has successfully established the risk-immune system of digital currency product innovation, laying a theoretical foundation for the innovation and development of blockchain digital currency products in the future.
In this paper, a multi-objective optimization-based path tracking method for a two-wheeled self-balancing robot (TWSBR) is proposed. First, the dynamics model of the system is established based on the Newton-Euler met...
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ISBN:
(纸本)9798350313567
In this paper, a multi-objective optimization-based path tracking method for a two-wheeled self-balancing robot (TWSBR) is proposed. First, the dynamics model of the system is established based on the Newton-Euler method and simulated in simulink. Then an artificial immune algorithm is used to find the optimal motion parameters for each control point based on the parameter feedback of the TWSBR, and finally a proportional-integral-derivative controller (PID) is used for control. The advantages of this study are as follows: (1) The stability of the TWSBR in high-speed working condition is improved and the efficiency of the robot is enhanced by the optimization algorithm. (2) The anti-jamming capability of the TWSBR is improved through parameter feedback. (3) The optimized PID controller is used to control the motor torque, which avoids manual adjustment of parameters and improves the control efficiency. The method can be applied to TWSBR with fixed paths such as logistics distribution and space disinfection.
The channel model optimization algorithm plays a critical role in novel communication method research. Wireless sensor connections using capacitive coupling communication inside a metal cabinet such as spacecraft are ...
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The channel model optimization algorithm plays a critical role in novel communication method research. Wireless sensor connections using capacitive coupling communication inside a metal cabinet such as spacecraft are an emerging communication technology. However, channel modeling along with optimization methods have not been systematically investigated. In this paper, a modified artificial immune algorithm (MAIA) was developed to optimize a few tens of model parameters for the capacitive coupling communication channel within a metal cabinet. The mathematical model of the communication channel was derived from the equivalent circuit model by analyzing the capacitive coupling electric field distribution. Unknown parameters in the model were optimally estimated by adopting MAIA with the objective of minimizing the root mean square error (RMSE) between the model computed data and simulation or experimental data. The proposed scheme enhanced the convergence performance by incorporating the artificial bee colony (ABC) algorithm, modifying the strategies of immune operations and introducing a similarity detection step. Validation results showed that the frequency response of the optimized model matched well with the simulation and experimental data, verifying the feasibility and robustness of the proposed MAIA. Compared with three other state-of-the-art ABC algorithms and three enhanced intelligent algorithms, it was demonstrated that the proposed algorithm performed better with respect to convergence speed and accuracy. The study provided a multiparameter channel model estimation solution for capacitive coupling communication within a metal cabinet research.
In this study, an adaptive multi-objective optimization artificial immune algorithm is presented for reactive power optimization. In the proposed algorithm, a non-inferior solution ranking method based on Pareto coeff...
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In this study, an adaptive multi-objective optimization artificial immune algorithm is presented for reactive power optimization. In the proposed algorithm, a non-inferior solution ranking method based on Pareto coefficient is proposed to rank antibodies. The fitness evaluation mechanism based on individual neighborhood selection and adaptive cloning operator ensure the convergence of the algorithm, and the chaotic random sequence is added to the mutation operator to improve the diversity of the antibody population. Considering the minimum active power loss, the maximum static voltage stability margin and the best voltage level, a multi-objective reactive power optimization model is established by introducing the static voltage stability index. IEEE-30 bus system is chosen as a research object. Combined with technique for order preference by similarity to ideal solution method, after the multi-attribute decision making of the Pareto solution set, the optimal solution cannot only ensure the economic operation of the system, but also enhance the voltage stability of the power grid. The designed reactive power optimization algorithm is effective.@2021 THE AUTHORS. Published by Elsevier BV on behalf of Faculty of Engineering, Ain Shams University. This is an open access article under the CC BY-NC-ND license (http://***/licenses/ by-nc-nd/4.0/).
To improve the construction safety degree,a twolevel construction safety control optimization model system is established for the complex construction safety control *** the first-level optimization model,the maximum ...
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To improve the construction safety degree,a twolevel construction safety control optimization model system is established for the complex construction safety control *** the first-level optimization model,the maximum cumulative construction safety improvement rate brought by the input of the major resources of the project is taken as the objective *** the constraints,the restriction of the sum of the input of each major resource and the proportion of the input of each major resource are *** main input values obtained by the first level optimization model are taken as an important prerequisite for the second-level optimization *** the second-level optimization model system,the construction safety control optimization models of three resources are established:construction worker allocation,construction material use and construction tower crane allocation *** immunealgorithm(AIA) is adopted to solve above two-level *** representing for above varied models on two levels and the detail steps of AIA is are *** scientificity and effectiveness of above twooptimization model system and AIA are verified.
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