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As more aerospace task are performed, the security of network which provide channel for the aerospace task is gradually recognized. Firstly, this paper discuss that the access control problem about multitask parallel processing. And then, It carry on the modeling According to the characteristics of multitask. In the end of the paper security of system is analyzed.
Systematic errors, such as multipath and residual atmospheric errors in GPS double difference carrier phase observations, are the main error sources for high precision GPS applications. The complicated properties of systematic errors limit the modelling and mitigation of these errors when parametric models are used. In this paper, a new approach based on wavelet analysis is developed to tackle them...
The main contribution of this paper is that, to improve the performance properties of satellite attitude manoeuvre controlled by nonlinear stabilizing control law derived from standard adaptive back-stepping method, a hybrid control approach is developed to guarantee the stability of system in global sense while improving control performance of satellite attitude manoeuvre problem in a local region...
Automatic classification has been applied to land use survey for its advantage of objectivity and high speed. The automatic classification results have met to the accuracy requirements in land-use status investigation. However, whether the automatic classification data can be used to monitor land-use changes and how much the error range is. In this context, little research has been done, especially...
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