This paper is concerned with the tracking control problem for lower-triangular systems unknown fractional powers and nonparametric uncertainties. A prescribed performance approach put forward as a means of resolving this problem. The proposed law incorporates set barrier functions to guarantee error constraints. Unlike previous works, our works cases where powers, nonlinearities, their bounding...

The User-over-Ranking hypothesis states that the best retrieval performance can be achieved with queries returning about as many results as can be considered at user site [21]. We apply this hypothesis to Lee et al.’s problem of automatically formulating a single promising query from a given set of keywords [16]. Lee et al.’s original approach requires unrestricted access to the retrieval syste...

Let AN be the symmetric operator given by the restriction of A toN , where A is a self-adjoint operator on the Hilbert space H and N is a linear dense set which is closed with respect to the graph norm on D(A), the operator domain of A. We show that any self-adjoint extension AΘ of AN such that D(AΘ)∩D(A) = N can be additively decomposed by the sum AΘ = Ā + TΘ, where both the operators Ā and TΘ...

The shape parameter estimation using the minimum-variance linear estimator with hyperparameter (MVLE-H) method is believed to be effective for a wear-out failure period in small sample. In process of estimation, our uses and estimate parameters MVLE-H method. To obtain optimal c, it takes long time, even case main purpose this paper remove restriction samples. We observed that if we set paramet...

MHD boundary layer flow of two phase model nanofluid over a vertical plate is investigated both analytically and numerically. A system of governing nonlinear partial differential equations is converted into a set of nonlinear ordinary differential equations by suitable similarity transformations and then solved analytically using homotopy analysis method and numerically by the fourth order Rung...

Given an arbitrary graph G = (V, E) and an additional set of admissible edges F , the Chordal Sandwich problem asks whether there exists a chordal graph (V, E ∪ F ′) such that F ′ ⊆ F . This problem arises from perfect phylogeny in evolution and from sparse matrix computations in numerical analysis, and it generalizes the widely studied problems of completions and deletions of arbitrary graphs ...

In this paper, natural convection heat transfer over a vertical plate in a Darcy porous medium saturated with a nanofluid subject to heat generation/absorption was theoretically studied. The governing partial differential equations were transformed to a set of ordinary differential equations using similarity transformations and solved using finite difference method. The influence of parametric ...

This paper deals with a theoretical investigation of heat and mass transfer with thermal radiation analysis on hydromagnetic peristaltic Prandtl fluid model with porous medium through an asymmetric tapered vertical channel under the influence of gravity field. Analytical results are found for the velocity, pressure gradient, pressure rise, frictional force, temperature and concentration. The in...