1 (t) then the tangent vector ^ T ips direction as can be shown by its dot product with ^ T. Rewriting equation 13 as ^ T (t) = (x 0 (t); y 0 (t)) + (?y 00 (t); x 00 (t))d k ^ Tk + (y 0 (t); ?x 0 (t))k ^ Tk 0 d k ^ Tk 2 and substituting it into ^ T (t) ^ T(t) = " (x 0 (t); y 0 (t)) + (?y 00 (t); x 00 (t))d k ^ Tk + (y 0 (t); ?x 0 (t))k ^ Tk 0 d k ^ Tk 2 # (x 0 (t); y 0 (t)) = (x 0 (t) 2 + y 0 (...

interval-valued intuitionistic fuzzy sets (ivifss) are widely used to handle uncertainty and imprecision in decision making. however, in more complicated environment, it is difficult to express the uncertain information by an ivifs with considering the decision-making preference. hence, this paper proposes a group generalized interval-valued intuitionistic fuzzy soft set (g-givifss) which conta...

investigation of reliability characteristics under fuzzy environments is proposed in this paper. fuzzy weibull distribution and lifetimes of components are using it described. formulas of a fuzzy reliability function, fuzzy hazard function and their α-cut set are presented. furthermore, the fuzzy functions of series systems and parallel systems are discussed, respectively. finally, some numeric...

The investigation of impact of fuzzy sets on zero forcing set is the main aim of this paper. According to this, results lead us to a new concept which we introduce it as Fuzzy Zero Forcing Set (FZFS). We propose this concept and suggest a polynomial time algorithm to construct FZFS. Further more we compute the propagation time of FZFS on fuzzy graphs. This concept can be more efficient to model...

This paper studies fixed-time tracking problems for stochastic nonlinear systems in strict-feedback form. Different from previous results, the practical bounded theorem is given. The unknown functions of are approximated by Fuzzy logic system (FLS) which has a universal approximation. Then using back-stepping method, novel adaptive fuzzy controller designed based on theorem. states guaranteed t...