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The structures approximation analysis technology is studied based on neural network. The back-propagation neural network model corresponding to the size parameters of the hydraulic press' crossbeam and its displacement or stress is generated to replace the original finite element model in this paper. Using the saturated multi-level table of orthogonal arrays to choose the trained samples could make...
Proposesing a multi-state adaptive ant pheromones mechanism base on researching on ant colony algorithm model, pheromones update and pheromones selection had been improved. Make up the traditional ant colony algorithm for the calculation of distribution network planning that is slow and easy to fall into local optimal solution. And improved the convergence of the optimal solution. The validity of...
Cognitive radio has been recognized as one of the most promising technologies dealing with the scarcity of the radio spectrum. In cognitive radio system, with spectrum sensing, secondary users are allowed to utilize the frequency bands of primary users when the bands are idle. Hence, how to accurately detect the idle frequency bands has attracted many researchers' eyes. Energy detection is the common...
When searching for robust optimal solutions in evolutionary optimization, a criterion for robustness estimation is needed. An expectation-based approach and a variance-based approach are highlighted in this paper. Experiments are conducted on a single-objective test function adopting three unequal values of dimension size, solved by an chaotic evolutionary algorithm. In both former low-dimensional...
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