Advanced Research in Civil Engineering, Materials, Machinery by M. Han, X. S. Tai

By M. Han, X. S. Tai

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Conclusions With the speeding up of urbanization in our country, urban drought, floods, and deterioration of water environment increasingly highlight the influence of urban sustainable development, we put rain flood utilization into the planning, put forward the corresponding guidance about the urban construction, effectively promote the technology application of the rain flood utilization and the reasonable development of the rain flood resources, which will reduce urban flooding as well as to a certain extent relieve the intense condition of the city water resources.

06/unsatisfied} c. 1 establishment of the artificial neural network model Network layer includes input, output and hidden layer. 2 artificial neural network evaluation algorithm of building energy saving As figure 1 shows artificial neural network, the nonlinear relationship between output and input of each node can be calculated with Sigmoid function, namely: f(x) = [1+e-x]-1 (15) 32 Advanced Research in Civil Engineering, Materials, Machinery and Applied Technologies The sample p of hidden layer is: n ypk = f( ∑ w jk u pj ), k∈(1,12) (16) j =1 The sample of output layer is: m b′P = f( ∑ wk y pk ) ypk (17) j =1 In formula(17), j∈(1, n); k∈(1, 12), wjk expresses the connection weights from the jth node of input layer to the kth node of hidden layer, wk expresses the connection weights from the jth node of hidden layer to the kth node of onput layer.

With the speeding up of the urbanization process, causing the deficit of urban water supply and urban waterlogging, we should take advantage of all available place to store rainwater, reduce urban waterlogging, increase water reuse, replenish groundwater, and improve the urban environment. Conclusions With the speeding up of urbanization in our country, urban drought, floods, and deterioration of water environment increasingly highlight the influence of urban sustainable development, we put rain flood utilization into the planning, put forward the corresponding guidance about the urban construction, effectively promote the technology application of the rain flood utilization and the reasonable development of the rain flood resources, which will reduce urban flooding as well as to a certain extent relieve the intense condition of the city water resources.

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