Moment invariants are widely used in image processing, pattern recognition and computer vision. Several methods and algorithms have been proposed for fast and efficient calculation of moment's invariants where numerical approximation errors are involved in most of these methods. In this paper, an optimized set of moment invariants with respect to rotation, scaling and translation is presented. ...

The report presents a model to investigate the collective behaviour of a colony when memory of the agents interferes with the usual interaction between individuals. The approach is developed in the framework of a simple situation consisting in tandem recruitment in a population of conservative agents but it is susceptible to be applied also to a wider range of problems. The principle of the met...

Objectives: To evaluate post lockdown mental health parameters that are anxiety, depression, and stress among students of Baqai Dental College, Karachi, Pakistan.Materials Methods: A cross sectional study was conducted all dental college academic years through convenience sampling with a valid questionnaire DASS 21 on phycological i.e., anxiety depression. Questionnaire distributed offi cial on...

We provide necessary and sucient conditions for psi-conditional as-ymptotic stability of the solution of a linear matrix Lyapunov system and sucientconditions for psi -conditional asymptotic stability of the solution of a rst ordernon-linear matrix Lyapunov system X0 = A(t)X + XB(t) + F(t;X).

In this paper at rst, a history of mathematical models is given.Next, some basic information about random variables, stochastic processesand Markov chains is introduced. As follows, the entropy for a discrete timeMarkov process is mentioned. After that, the entropy for SIS stochastic modelsis computed, and it is proved that an epidemic will be disappeared after a longtime.