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This paper proposes a novel multibit color-mapping steganographic scheme for palette images. Each color in the palette is considered to be a graph node, and a color-graph is constructed according to small color-difference. Some color-nodes in the color-graph are mapped to one bit-sequence with an indefinite length by exploiting a layer-by-layer depth-first search technique. Accordingly, some colors...
The main purpose of the paper is to provide the adapted and casual solution to the stochastic linear quadratic control problem for systems with multiple input-delays (SLQD). We introduce a special stochastic discrete-time maximum principle (SDMP) where instead of the admissible set consisting of the Fk−1-measurable control variable uk for any k, the admissible set is restricted to compose of the F...
The main purpose of the paper is to settle the stochastic linear quadratic control problem for systems with multiple input-delays (SDLQ) which is very intractable and remains to be solved. We introduce a different version of stochastic discrete-time maximum principle (SDMP) where it is shown that the auxiliary variable depends on the optimal system state through a stochastic matrix and the expectation...
The paper discusses relationships between the H∞ preview control and the standard H∞ control, between the H∞ fixed-lag smoothing and the H∞ filtering. It is easy to understand intuitively that the H∞ preview control problem is inevitably solvable if the standard H∞ control problem for the identical system is solvable and that the H∞ fixed-lag smoothing problem is solvable as the H∞ filtering problem...
The paper discusses the H∞ preview control problem. We apply simple tools such as completion of square to solve the problem. The sufficient and necessary condition under which the finite-horizon problem is solvable is provided and is actually the inertia condition reflecting the aftereffect from the disturbance. Different from existing results, the proposed controller is given by a Riccati equation...
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