نتایج جستجو برای: set b
تعداد نتایج: 1504919 فیلتر نتایج به سال:
سابقه و هدف: شیگلا از عوامل شایع مرگ و میر در کودکان است. مطالعات اخیر در ایران نشان داده است که شیگلا از عوامل مهم دیسانتریه باسیلی می باشد. set1b و set1a از ژن های مهم ویرولانس شیگلا محسوب می شوند. هدف از این مطالعه بررسی فراوانی ژن های set1b و set1a در سویه های باکتریایی جداشده از افراد مبتلا به اسهال دیسانتری با روش multiplex-pcr می باشد. مواد و روش ها: در این مطالعه توصیفی مقطعی تع...
let h be a separable hilbert space and let b be the set of bessel sequences in h. by using several interesting results in operator theory we study some topological properties of frames and riesz bases by constructing a banach space structure on b. the convergence of a sequence of elements in b is de_ned and we determine whether important properties of the sequence is preserved under the con...
let g=(v,e) be a graph with vertex set v and edge set e.for two vertices u,v of g ,the closed interval i[u,v] ,consists of u,v and all vertices lying in some u-v geodesic in g.if s is a set of vertices of g then i[s]is the union of all sets i[u,v]for u,v ? s. if i[s]=v(g) , then s is a geodetic set for g.the geodetic number g(g) is the minimum cardinality of geodetic set.the maximum cardinalit...
Fuzzy relation inequalities based on max-F composition are discussed, where F is a binary aggregation on [0,1]. For a fixed fuzzy relation inequalities system $ A circ^{F}textbf{x}leqtextbf{b}$, we characterize all matrices $ A^{'} $ For which the solution set of the system $ A^{' } circ^{F}textbf{x}leqtextbf{b}$ is the same as the original solution set. Similarly, for a fixed matrix $ A $, the...
fuzzy relation inequalities based on max-f composition are discussed, where f is a binary aggregation on [0,1]. for a fixed fuzzy relation inequalities system $ a circ^{f}textbf{x}leqtextbf{b}$, we characterize all matrices $ a^{'} $ for which the solution set of the system $ a^{' } circ^{f}textbf{x}leqtextbf{b}$ is the same as the original solution set. similarly, for a fixed matrix ...
Based on a new hesitant fuzzy partial ordering proposed by Garmendia et al.~cite{GaCa:Pohfs}, in this paper a fuzzy disjunction ${D}$ on the set ${H}$ of finite and nonempty subsets of the unit interval and a t-conorm ${S}$ on the set $bar{{B}}$ of equivalence class on the set of finite bags of unit interval based on this partial ordering are introduced respectively. Then, hesitant fuzzy negati...
Let b and c be two elements in a semigroup S. This paper is devoted to studying the structures of S||(b,c) H(b,c) S, where stands for set all (b, c)-invertible = {y ? S | bS1 yS1, S1y S1c}. Denote c)-inverse by a||(b,c). If , ?, then {a||(b,c)| S||(b,c)}. We first find some new equivalent conditions group analyze its structure from viewpoint generalized inverses. Then necessary sufficient condi...
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