外文翻譯---供應(yīng)鏈管理環(huán)境下的庫存優(yōu)化-環(huán)境工程(文件)
【正文】 n rate for ξ， then we will also take account of the feasibility of quantification. Now we will give a specific triplelayers BPNN model based on the actual inventory condition of a steel corporation to predict the change of the demand of the steel plate. This steel corporation is also a link in a supply chain, so it can get some specific information from its strategic cooperators. Now we select the demand of previous epoch: x1，the price of this epoch:x2， the internal rate of return of total steel vocation: x3， the factor of season change: x 4,making the four factors as input layer。 neuron should depend on the optimization method which we use. The model structure is show below: With some sampled data, we can select a suitable transfer function and train this model. In the process of training, we can use the ANN tools provided by MATLAB. Once the model is trained to a satisfactory level, we can utilize it to predict the change of this corporation39。 At the same time, the number of the 39。 is a supervised process that occurs with each cycle or 39。 where the answer is output as shown in the graphic below: The other two elements of BPNN are the propagation funtions of fi ,gi and the interconnection weights between the namely the weights :wij, sij， and the value of threshold: θi,βi .The relationships of these elements are determinated by the equations as follow: BPNN contains form of 39。 where the actual processing is done via a system of weighted 39。. Patterns are presented to the work via the 39。 such as: the price of product, the change of marketing seasons, the internal rate of return of total vocation. Of cause, as for a specific enterprise ,the factors may be variable ξ may not conform to a deterministic probability distribution, and the optimum inventory strategy obtained in this way may not meet with the realistic requirement. IMPROVEMENT BASED ON THE MECHANIC OF SUPPLY CHAIN MANAGEMENT The direct and profound effect to the enterprise by the think of SCM is the change of decision mode: Change from the traditional, blocked longitudinal think mode into transversal, opening think mode. With the developing of IT and logistics technology, enterprise may have the ability to realize the translation based the Intra\Extra, Inter, and EDI technology .The operational mechanic of enterprise based on the SCM is shown below: According to the figure above, enterprises to one specific SC may share some important information which is the business secret for enterprise under the information enterprise traditional SC. With this information enterprise can improve prediction for inventory, marketing, the precision of etc. MULTIPLELAYER BP NEURAL NETWORK (1) Generalization of BPNN Artificial Neural Network, ANN for short, is an informationprocessing paradigm inspired by the way the densely interconnected, parallel structure of the mammalian br
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