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It is very important for searcher to predict the lost plane falling rang. The motion equation of lost plane is built with additional mass and random force, and solved by using difference method abd random number, the trajectory is calculated by using integral method, the lost plane falling rang is determined by using probability distribution contour map.
In this paper we present an automatic vehicle ingress/egress counting method by clustering dense trajectories extracted from monitoring videos. Dense trajectories are extracted based on dense optical flow when passengers cross the door of the vehicle, and then clustered into different groups according to their descriptors with each legitimate group as a passenger. The contribution of the proposed...
For better manipulability, a criterion in the form of a quadratic function is presented for the self-motion planning (SMP) of redundant manipulators with no target-configuration assigned. Such SMP scheme could automatically select the desirable configuration so that the manipulator could be more flexible and maneuverable. As physical limits generally exist in actual redundant manipulators, both joint...
Chaos of a new class of Hopfield neural networks is investigated. Numerical simulations show that the simple Hopfield neural networks can display chaotic attractors and limit cycles for different parameters. By virtue of horseshoes theory in dynamical systems, the rigorous computer-assisted verifications for chaotic behavior of the system for certain parameters is given, and also the quantitative...
In this paper, a scheme is proposed and investigated for the self-motion planning of PUMA560 robot arm, a functionally redundant manipulator (if the end-effector positioning is only considered). As joint physical constraints always exist in robot arms, we incorporate both the joint angle limits and joint velocity limits into the self-motion planning scheme as well. This scheme is formulated as a quadratic...
This paper proposes a new type of query for moving object trajectories -- continuous interval-based nearest neighbor (CINN) query. We clearly define the CINN in the context of streaming trajectory data. To efficiently process CINN queries, we first propose a spatial hashing algorithm (SH). Then we show theta new temporal hashing algorithm (TH) using speed constraints can save substantial computation...
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