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In this paper we study rare event simulation for the tail probability of an affine point process (Jt)t??0 that generalizes the Hawkes process. By constructing a suitable exponential martingale, we are able to construct an importance sampling algorithm that is logarithmically efficient in the Gartner-Ellis asymptotic regime.
In wireless sensor networks, proposed an energy efficient routing strategy based on ant colony algorithm. The algorithm combined residual energy of nodes, and accorded to transition probability to choose the next node. When ants passed a node, updated the path list and node information table .Through the node information table, nodes in the network are divided into ordinary nodes and aggregation nodes,...
When the current block is at the edge of the objects, the prediction accuracy of H.264 intra-frame coding will be decreased. An enhanced intra prediction method is proposed in this paper based on the directional of intra prediction and correlation among adjacent pixels in the current block. The proposed algorithm use the pixels calculated already as the reference pixels to predict the rest pixels...
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