Journal of Hyperstructures
Volume:2 Issue: 2, Summer and Autumn 2013

In this paper, the concepts of M-fuzzy left h-ideals (right h-ideals, h-bi-ideals, h-quasi-ideals) in M-Gamma-hemirings are introduced. Some new properties of these kinds of M-fuzzy h-ideals are also given. Finally, we show that h-hemiregular, h-intra-hemiregular and h-quasi-hemiregular M-Gamma-hemirings can be described by M-fuzzy left(right) h-ideals, M-fuzzy h-bi-ideals and M-fuzzy h-quasi-ideals, respectively.

The soft category theory oers a way to study soft theories developed so far more generally. The main purpose of this paper is to introduce the basic notions of the theory of soft categories, to present some introductory results of the theory. Also we compare soft category with fuzzy category.

The concept of idealistic soft $\Gamma-$rings is introduced, some properties of idealistic soft $\Gamma-$rings are given< In particular, three basic $\Gamma-$isomorphism theorems are established. Finally, the definitions of prime idealistic soft $\Gamma$rings and fuzzy ideals of idealistic soft $\Gamma-$rings are proposed, then some theory of them is considered.

In this paper, we dene the concept of (;_)-derivations for BL-algebras and discuss some related results. We study this derivation on boolean center B(A) of a BL-algebra A. Finally, we investigate some properties of isotone (; _)-derivations on a BL-algebra A and characterize the (;_)-derivation on the Godel structure [0; 1].

In this article, it an achievement for our part to be had of notions of a few operations on intuitionistic fuzzy soft sets and generalization of De Morgan''s laws with respect to some operations in intuitionistic fuzzy soft set theory. It is being validated by suitable example. Thereafter properties like associative, distributive relative to dierent operations on intuitionistic fuzzy soft set are established and justied by suitable example. It is shown that Restricted symmetric dierence operation does not satisfy associative and restricted intersection does not distribute over restricted symmetric dierence in intuitionistic fuzzy soft set theory.

In recent years, some of parameters estimated negative binomial distribution is obtained by the researchers. One of the parameters of this distribution, is the number of successes that we''ve discussed here with another view. In this paper, the problem of estimating the number of successes, k, in a negative binomial distribution for both known and unknown probability p of success are examined from a Bayesian point of view.

In this paper, estimation of snow particles velocity and snow-drift density by mathematical modeling is studied. The snow particles ow while modeling from fluid dynamic concepts and micro- continuum approach (couple stresses fluid [1]). The present approach is compared to conventional classical approach of logarithmic law of snow-drift density [2]. It is shown that, the present approach yield better results than that of conventional approach. The snow-drift density has been estimated by using momentum equation and then it compared to snow-drift density [3, 4].