نتایج جستجو برای: positive function
تعداد نتایج: 1800927 فیلتر نتایج به سال:
In this paper we investigate a kind of boundary value problem involving a fractional differential equation. We study the existence of positive solutions of the problem that fractional derivative is the Reimann-Liouville fractional derivative. At first the green function is computed then it is proved that the green function is positive. We present necessary and sufficient conditions for existen...
We observe that successive applications of known results from the theory of positive systems lead to an efficient general algorithm for positive realizations of transfer functions. We give two examples to illustrate the algorithm, one of which complements an earlier result of [6]. Finally, we improve a lower-bound of [18] to indicate that the algorithm is indeed efficient in general.
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