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The development of modern information technology and digitalization of our daily lives brings security database new challenges. It is necessary for a security database to provide access control and privacy protection mechanism to ensure the legal use of data and to prevent privacy breach. This paper introduces an integrated security model which can provide the functions of privacy protection and access...
Randomization-based motion planning algorithm is represented to solve the servicing spacecraft maneuvering in close proximity of servicing target on elliptical orbit. This algorithm can satisfy the requirement of real-time planning, and consider a variety of constraints. State transition matrix is applied to computation of relative motion on elliptical orbit without numerical integration for reduction...
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