The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
To solve the problem of grid resource allocation for tasks, an allocation algorithm based on improved particle swarm optimization was proposed. This algorithm leaded the cross operation, variation operation and select operation of the GA to the Particle Swarm Optimization Algorithm, it effectively overcame the inherent flaw of getting local optimal value by particle swarm algorithm and find the global...
Hydroforming is the most widely used process in manufacturing steel products. Since the quality of the final parts are mostly influenced by formability of steel materials, How to determine the formability of steel materials becomes the key to improving the part quality. Back Propagation (BP) Neural Network has the ability of self-studying, self-adapting, fault tolerance and generalization was applied...
To support high bandwidth with high mobility is the predominant objective of next-generation networks. As some networks such as UMTS (universal mobile telecommunication system) can offer a wide geographical coverage with relatively low data rate, while other networks such as WLAN (wireless local area network) can support much higher bandwidth at a local level, network selection is becoming one of...
Detailed kinetic model is one of the most important basic research items that the chemic synthesis techniques will have been commercialized from laboratory. A great breakthrough has been made in the detailed mechanistic kinetics of the chemic synthesis, but LM (Levenberg-Marquardt) algorithm still plays a leading role in estimating parameters of the kinetic model. As an unlimited algorithm, LM algorithm...
An approach to construct multiple Pareto-optimal fuzzy systems based on NSGA-II is proposed in this paper. First, in order to obtain a good initial fuzzy system, a modified fuzzy clustering algorithm is used to identify the antecedents of fuzzy system, while the consequents are designed separately to reduce computational burden. Second, a Pareto multi-objective genetic algorithm based on NSGA-II and...
A novel approach to construct accurate and interpretable high-dimensional fuzzy classification system is proposed in this paper. First, in order to relieve the problem of dimension disaster, a feature selection is accomplished by the Simba algorithm. Then a fuzzy clustering algorithm is using to identify an initial fuzzy system. Finally the structure and parameters of the fuzzy system are optimized...
Traditional Grey GM(1,1) Model had its defect when it was applied to forecast relative data series. The relationship between different data series can't be reflected properly. In order to solve the problem, artificial neural network (ANN) is combined to forecast multi-series data. Then the network optimization is aided by improved genetic algorithm (GA). So the network weights and thresholds were...
According to the complexity and risk of the reverse logistics, the main objective of this paper is to propose a multistage methodology for designing a reverse logistics network from the risk management perspective. Firstly, we applied fuzzy DEA model to assess the candidate reverse logistics suppliers based on the risk management. Furthermore, we founded a mixed integer programming model by considering...
Hydroforming is relatively a new technology to manufacture ball valve shell, and the process parameters in hydroforming have the critical effects on the final part quality. In this paper, a novel method of optimization for the process parameters is developed. On basis of the quality demand of parts, the objective function is defined. Using the stress ratios as the optimization variables, the genetic...
Weapon-target assignment problem (WTA) was described and its mathematic model was established. Ant colony algorithm (ACA) was introduced briefly; a novel and equivalence coding method to solve WTA based on ACA was proposed. Aiming at ACA's defects, the strategy to select the next node was improved; crossover and mutation in GAs were introduced in, so the search space was opened up. The steps to realize...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.