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With the requirement of the emission regulations for the transient working condition of the vehicle diesel engine and the increasing demand of the public to the energy saving, the optimization of the transient performance of the engine based on DSPACE is very important. To this end, this study carried out on a turbocharged diesel engine under transient operating conditions of the test and analysis...
The maximum likelihood (ML) estimation method has been extensively applied to identifying the parameters of an aircraft. But it has to derive sensitivity equations in advance and solve sensitivity matrices, thus being complicated for its application and easily reaching locally optimal solutions. The paper proposes an aircraft's parameter identification algorithm, which optimizes the ML function with...
There are massive data in the aerospace field, and the characteristics of the aerospace data evoke the difficulty to query from the data. The multi-join queries can ease the difficulty. A BCOP_GA algorithm based on the Genetic Algorithm for multi-join query of the specific data with a new appropriate cost model for it is proposed. The algorithm takes the advantages of both Bee Colony Algorithm and...
Image segmentation based on Bee Colony Algorithm (BCA) and fuzzy entropy is presented in this paper. The fuzzy entropy function is simplified with single parameter. The BCA is applied to search the minimum value of fuzzy entropy function. According to the minimum function value, the optimal image threshold is obtained. Experimental results are provided to demonstrate the superior performance of the...
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