Debris Flow Hazard Assessment Based on Improved Matter-Element Extension Model
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Abstract:
As weight is an important issue in risk evaluation of debris flow, an optimization algorithm of determining weight reasonably is proposed in this paper based on improved combination weighting matter-element extension model. Firstly, according to references, risk classification standard of debris flow is suggested, and assessment indices of hazard degree are set up. Then, with matter-element extension evaluation idea, in order to get the weight of each indicator of this method, coupling the subjective weight calculated by analytical hierarchy process and the objective weight calculated by projection pursuit method with distance function to get comprehensive weight of indicators, using bat algorithm which is optimized by projection pursuit method to get solution, according to above research, combination weighting matter-element extension model and algorithm of debris flow are built. Finally, programming with Mat lab language to realize this algorithm, compare the results from this algorithm to existing projects, it turns out that the evaluation conclusion is reasonable which has definite value to engineering application.
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