Qingwen Sun

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Data aggregation is one of the key technologies in the wireless sensor networks (WSNs). Moreover, the privacy of data must be preserved in WSNs. A privacy preserving data aggregation scheme is designed in the energy efficient manner in this paper. Based on the reflexivity property of the XOR operation, the original data obtained from sensor is sliced into(More)
The shaping of the buyer's market and the increasingly throat-cutting competition both serve as the key reasons for the account sale being the essential selling means for enterprises, therefore, it matters a great deal for businesses to exactly assess the returns of the account sale and balance the returns and risks of credit. In this paper, the profit(More)
The amount of sales un-house is important basis for inventory management of commerce enterprises. Through carefully analyzing about previous researching results, we find that tradition forecasting methods, such as time series analysis, regression analysis, Kalman filtering and the predictions of neural networks, have some defects in large information(More)
The efficiency evaluation of enterprise management is a fundamental factor in the promptness of evaluating enterprises, surveying the management situation and taking measures to be efficient, and also one of the key factors determining enterprise development. It is necessary to explore effective ways of management in order to enhance the competitiveness and(More)
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