Volume 12, Issue 2, Autumn 2018, Page 13-87


Adaptation of a Mosquito Swarm Algorithm to Solve a Binary Knapsack Problem

AL-Rafidain Journal of Computer Sciences and Mathematics, Volume 12, Issue 2, Pages 13-24

The paper tackled one of the artificial intelligence algorithms which is Mosquito swarm algorithm as a nature inspired algorithms, to solve 0-1 knapsack an optimization problem through adaptation steps of a Mosquito swarm algorithm and the inspiration coming from the behavior of Mosquitoes, in addition to propose steps (update) for Chemical sensors, Heat sensors and location of Mosquito, to find an optimal solution in small search space and small computational requirements. A program is written in MATLAB 7.10. language to simulate this algorithm with 0-1 knapsack problem. The experimental results in this research showed effective approach, easy implementation of algorithm to find optimal solution. .

On Almost Weakly np – injective Rings

AL-Rafidain Journal of Computer Sciences and Mathematics, Volume 12, Issue 2, Pages 25-30

The ring R is called right almost weakly np – injective, if for any a∈N_2 (R), there exists a positive integer n and a left ideal X_(a^n ) of R such that lr(a^n )=Ra^n⨁X_(a^n ). In this paper, we give some characterization and properties of almost weakly np – injective rings. And we study the regularity of right almost weakly np – injective ring and in the same time, when every simple (simple singular) right R – module is almost weakly np – injective, we also give some properties of an R. R.

On Annihilating - Ideal Graph of Zn

AL-Rafidain Journal of Computer Sciences and Mathematics, Volume 12, Issue 2, Pages 31-42

In this paper, we study and give some properties of annihilating-ideal graphs of Zn, also we find Hosoya polynomial and Wiener index for this graph.
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The Application of Some Linear Feedback Control Strategies on 3D Chaotic System

AL-Rafidain Journal of Computer Sciences and Mathematics, Volume 12, Issue 2, Pages 43-51

This paper tackles to some linear feedback control strategies, where we take a 3D chaotic system with a five critical point of unstability, which is discovered by scientist [Zhu Congxu, 2010]. So we applied some linear feedback strategies: first strategy Ordinary Feedback Control and the second strategy Dislocate Feedback Control on this system at origin point and we noticed that a necessary condition for suppression is getting positive feedback coefficient; but this condition fails at some strategies. For this reason, we focused on these cases in our search, and design more than a strategy for studying these different situations. Theoretical analysis and numerical simulation check the validity of the results obtained..