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With the development of the four global navigation satellite systems(GNSS), the integrated positioning of four GNSS has become future development trend. A combined positioning algorithmusing four system data with weighted measurement fusionis developed in the paper. Using DCB data provided by IGS, the satellite clock error was corrected for each code. The four GNSS positioning accuracy was analyzed...
Quality of Service (QoS) play very important role in web service recommendation system. The precision of service recommendation depends on the credible QoS. So people begin to find better method for calculating the credibility of QoS. We can count the execution result and user comment to calculate the QoS credibility of single web service. But how to calculate the QoS credibility of web service composition...
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