This paper discusses an almost periodic Lotka-Volterra cooperation system with time delays and impulsive e ects. By constructing a suitable Lyapunov functional, a sucient condition which guarantees the existence, uniqueness and uniformly asymptotically stable of almost periodic s...
Open access
Research Article10.9734/BJMCS/2017/29723
Aims: To design and implement a classification-based model using specific features for identification and extraction of high quality questions in a thread. Study Design: The study design is divided into three modules: preprocessing, configuration, and question classification Plac...
Open access
Research Article10.9734/BJMCS/2017/32541
In this paper, we define a new topological structure of D-closed, D-continuous and D-fixed point property and discussed of its properties, some result for this subject are also established.
Open access
Research Article10.9734/BJMCS/2017/32791
A third order analytic approximation solution of Lyapunov orbits around the collinear equilibrium in the planar restricted three-body problem by utilizing the Lindstedt Poincaré method is presented. The primaries are oblate bodies and sources of radiation pressure. The theory has...
Open access
Research Article10.9734/BJMCS/2017/33168
In this paper, a class of -rings which is a generalization of*–reversible rings is introduced. A ring with involution * is called central *–reversible if for a,b ∈ R whenever ab= 0, b* a is central in R. Since every *–reversible ring is central *–reversible, sufficient conditi...
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Research Article10.9734/BJMCS/2017/32407
Francisco A. Betancourt, Dalia M. Muñoz Pizza, Anibal Muñoz Loaiza, John F. Arredondo Montoya, Carlos A. Abello Muñoz, Oscar A. Manrique Arias, Julian A. Olarte, Steven Raigosa Osorio, Hans Meyer Contreras & Valentina Zuluaga Zuluaga·Journal of Advances in Mathematics and Computer Science·2017
It is formulated and analyzed an optimal control problem for the transmission dynamics of the SEIS-like pulmonary tuberculosis (TB) including prevention by means of non-linear differential equations, which are linked to a functional cost. Also, it is established and analyzed the...
Open access
Research Article10.9734/BJMCS/2017/30381
This paper handles a prominent problem of project management, namely that of project scheduling under uncertainty. The paper models this problem as a vector-weighted voting system and expresses the indicator variable for the successful (on-time) completion of project activities a...
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Research Article10.9734/BJMCS/2017/33161
The wind speed equation of circular cyclone is a set of non-linear partial differential equations (PDE) with 4 unknown functions u (wind speed), ρ (density), p (pressure) and T (temperature) and is separated to 14 unknown functions, 4 unknown constants related by 15 equations. Th...
Open access
Research Article10.9734/BJMCS/2017/33249
Wearable electronics are electronic products which are implemented by using both electronics technologies and computing devices that a person can wear usually on a daily basis and integrated into clothing. Wearable devices come in many forms with various levels of complexity. Cur...
Open access
Research Article10.9734/BJMCS/2017/32721
We introduce the seemingly new concept of a rigid matrix based on the comparison of its sparsity to the sparsity of the natural powers of the matrix. Our results could be useful as a usage guide in the scheduling of various iterative algorithms that appear in numerical linear alg...
Open access
Research Article10.9734/BJMCS/2017/32839