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北方平原河道洪水演算方法探讨 被引量:1
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作者 雷德林 雷蕾 《水利科技与经济》 2018年第7期13-17,共5页
干涸河道各次洪水间河道状况变化较大,传统的河道洪水预报方法精度不高。将MSK(马斯京根河道演算)与R.E.Horton(霍顿饱和下渗理论)相结合,实现实时校正参数的河道洪水演算方法。通过在常年干涸、过水及输水河道中进行应用,效果较好,有... 干涸河道各次洪水间河道状况变化较大,传统的河道洪水预报方法精度不高。将MSK(马斯京根河道演算)与R.E.Horton(霍顿饱和下渗理论)相结合,实现实时校正参数的河道洪水演算方法。通过在常年干涸、过水及输水河道中进行应用,效果较好,有较广的适用范围。 展开更多
关键词 实时校正参数 干涸河道 下渗河道 方法
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A hand tracking algorithm with particle filter and improved GVF snake model 被引量:1
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作者 SUN Yi-qi WU Ai-guo +1 位作者 DONG Na SHAO Yi-zhe 《Optoelectronics Letters》 EI 2017年第4期314-317,共4页
To solve the problem that the accurate information of hand cannot be obtained by particle filter, a hand tracking algorithm based on particle filter combined with skin-color adaptive gradient vector flow(GVF) snake mo... To solve the problem that the accurate information of hand cannot be obtained by particle filter, a hand tracking algorithm based on particle filter combined with skin-color adaptive gradient vector flow(GVF) snake model is proposed. Adaptive GVF and skin color adaptive external guidance force are introduced to the traditional GVF snake model, guiding the curve to quickly converge to the deep concave region of hand contour and obtaining the complex hand contour accurately. This algorithm realizes a real-time correction of the particle filter parameters, avoiding the particle drift phenomenon. Experimental results show that the proposed algorithm can reduce the root mean square error of the hand tracking by 53%, and improve the accuracy of hand tracking in the case of complex and moving background, even with a large range of occlusion. 展开更多
关键词 Bandpass filters Mean square error Monte Carlo methods Tracking (position)
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