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This paper aimed at accept accurate output query results for the XQuery query over the XML Streams, and presents a solution based on XML Streams. Dynamically insert the update events into the XML Streams, constructed XML update Streams, so that we can receive continuous and precise results. XQuery language based on XPath queries use FLOWR expressions to achieve the complexity of queries on XML data...
This paper deals with transfer alignment between the slave inertial navigation system (INS) of scientific experiment and the master INS of space moving platform. Firstly, the navigation equations of the master and slave INS in J2000 inertial frame are presented. Then, we derive the state equations of transfer alignment model in detail, which include the error equations of the slave INS navigation...
This paper deals with the equivalence between the traditional transfer alignment (TTA) equations and the rapid transfer alignment (RTA) equations proposed by Kain and Cloutier. The TTA and RTA equations are presented firstly, and the platform misalignment vector, the physical misalignment vector and the measurement misalignment vector introduced by Kain and Cloutier are explained. The relationships...
On account of its sensitivity to external interferences of the magnetic field, the electric compass itself is not accurate enough to be used for localization compared with the rate gyroscope. To overcome this shortcoming, in this research, a robust electric compass was designed by using two electric compasses to efficiently cancel out the low-frequency interferences. That is, in this paper, a double...
A new electric compass technique is proposed for localization to improve the reliability of automobile navigation system. On account of its sensitivity to external interferences of the magnetic field, the electric compass itself is not accurate enough to be used for localization compared with the rate gyroscope. To overcome this shortcoming, in this research, a robust electric compass was designed...
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