Liu Haohan

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The essence of traditional ANN algorithm is to transfer the input-output problem of a group sample into a nonlinear programming problem. And it is a learning method to use iteration to work out weight problem along the negative gradient direction, but its convergence rate is slow and it is easy to fall into local minimum. Previously, there are many improved(More)
The applied research for visualization methods in recommendation systems are demonstrated from the data analysis, results and explanation of the recommendations and human-computer interaction. First, various categories of visualization methods thoughts are described, and their characteristics, pros and cons are analyzed. Second, the typical application(More)
first of all, by defining low-grade reservoir in this paper, we evaluate and quantitatively analyze operational risks of the untapped low-grade reservoir and classify the operational risks. Then, through introducing the probability analysis method and combining with the low-grade reservoir operation, we establish the operational risk assessment model of the(More)
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