Yasumichi Hasegawa's Algebraically Approximate and Noisy Realization of PDF

By Yasumichi Hasegawa

ISBN-10: 3642032168

ISBN-13: 9783642032165

This monograph bargains with approximation and noise cancellation of dynamical structures which come with linear and nonlinear input/output relationships. It additionally care for approximation and noise cancellation of 2 dimensional arrays. will probably be of particular curiosity to researchers, engineers and graduate scholars who've really good in filtering idea and process conception and electronic photos. This monograph consists of 2 components. half I and half II will care for approximation and noise cancellation of dynamical structures or electronic photographs respectively. From noiseless or noisy info, aid can be made. a mode which reduces version details or noise used to be proposed within the reference vol. 376 in LNCIS [Hasegawa, 2008]. utilizing this technique will permit version description to be taken care of as noise aid or version relief with no need to trouble, for instance, with fixing many partial differential equations. This monograph will suggest a brand new and simple process which produces a similar effects because the approach handled within the reference. As evidence of its beneficial influence, this monograph presents a brand new legislation within the experience of numerical experiments. the recent and simple procedure is carried out utilizing the algebraic calculations with no fixing partial differential equations. For our function, many real examples of version details and noise relief can also be provided.

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Extra resources for Algebraically Approximate and Noisy Realization of Discrete-Time Systems and Digital Images

Example text

Under the constraint Aˆ xi = 0, x s K n1 and x ¯Ti,2 ∈ K n2 for i (1 ≤ i ≤ s), let ¯i x ¯i take minimum i=1 x value, where x ¯i x ¯i denotes the inner product of the vectors x ¯i and x ¯i . Then λT2 λT2 T T −1 = A [AA ] A x holds for i (1 ≤ i ≤ s), where λT2 = ˆi + x ¯i x ¯i a1 [aT2 a2 ]−1 aT2 x ¯i,2 for A := [aT1 aT2 ]. [proof]⎡Let AT ⎢ 0 ⎢ S1 = ⎢ . ⎣ .. x ∈ K sn×1 ,⎤S1 and S⎡2 ∈ K qs×ns be x ⎤:= [xT1 , xT2 , · · · , xTs ]T BT 0 · · · 0 0 ··· 0 T T ⎢ ⎥ ⎥ A ··· 0 ⎥ ⎢ 0 B ··· 0 ⎥ , S2 = ⎢ . . ˆ+x ¯, x ˆ := ⎥, where x = x .

Under the constraint Aˆ xi = 0 for i (1 ≤ i ≤ s), let i=1 x ¯i x ¯i take a minimum value, where x ¯i x ¯i denotes the inner product of the vectors x ¯i and x ¯i . Then x ¯i = AT [AAT ]−1 Axi holds for i (1 ≤ i ≤ s). [proof] x ∈ K sn×1 ⎤and S ∈ K qs×ns be x := [xT1 , xT2 , · · · , xTs ]T and ⎡ Let T A 0 ··· 0 ⎢ 0 AT · · · 0 ⎥ ⎥ ⎢ ˆ+x ¯, x ˆ := [ˆ xT1 , x ˆT2 , · · · , x ˆTs ]T , x ¯ := S = ⎢ . . ⎥ , where x = x ⎣ .. . . ⎦ 0 ¯T2 , · · · [¯ xT1 , x 0 · · · AT ,x ¯Ts ]T . ¯] + [x − x ¯]T S T λ Let a scalar function f (¯ x, λ) be f (¯ x, λ) = x ¯ x ¯ + λT S[x − x qs×1 for a Lagrange multiplier vector λ ∈ K .

Here we have introduced a new method which is the algebraic CLS method. However, it is well-known that the analytic method is troublesome and that the AIC method is only applied to linear systems. Here, we list the difference between the algebraic CLS and AIC methods through our examples. The error in the next table means the mean value of the square root of the V following value: (1/V ) ∗ i=1 (signal(i)−obtained signal(i))2 . No. dim. ’ denotes the number of examples in this chapter. ’ denotes the number of dimensions of the original systems.

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Algebraically Approximate and Noisy Realization of Discrete-Time Systems and Digital Images by Yasumichi Hasegawa


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