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Apple price prediction method based on distributed neural network
Bin LIU, Jinrong HE, Yuancheng LI, Hong HAN
Journal of Computer Applications    2020, 40 (2): 369-374.   DOI: 10.11772/j.issn.1001-9081.2019081454
Abstract373)   HTML2)    PDF (672KB)(374)       Save

Concerning the issue that the traditional price prediction model for agricultural product cannot predict the market price of apple quickly and accurately under the big data scenario, an apple price prediction method based on distributed neural network was proposed. Firstly, the relative factors that affect the market price of apple were studied, and the historical price of apple, historical price of alternatives, household consumption level and oil price were selected as the input of the neural network. Secondly, a distributed neural network prediction model containing price fluctuation law was constructed to implement the short-term prediction for the market price of apple. Experimental results show that the proposed model has a high prediction accuracy, and the average relative error is only 0.50%, which satisfies the requirements of apple market price prediction. It indicates that the distributed neural network model can reveal the price fluctuation law and development trend of apple market price through the characteristic of self-learning. The proposed method not only can provide scientific basis for stabilizing apple market order and macroeconomic regulation of market price, but also can reduce the harms brought by price fluctuations, helping farmers to avoid the market risks.

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Research of user Agent mechanism in RBAC model
yueyang chen xuesen ma jianghong han
Journal of Computer Applications   
Abstract1713)      PDF (530KB)(1124)       Save
In order to solve the more and more complicated problem of permission assignment between users and services on ASP service platform, A new Role-Based Access Control (A_RBAC) model was proposed. A_RBAC model made platform services associated with enterprise level user by making use of Agent layer, adopted mechanism of user role access control of classification authorization, implemented regional autonomy of permission access in user Agent mechanism and was applied to the platform of information trusteeship of small medium enterprises with Lightweight Directory Access Protocol (LDAP) and Java 2 Platform Enterprise Edition (J2EE) in Hefei city. The results show that the complexity of permission assignment is effectively reduced.
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