in this paper, we study the generalized bin covering problem. for this problem an exact algorithm is introduced which can nd optimal solution for small scale instances. to nd a solution near optimal for large scale instances, a heuristic algorithm has been proposed. by computational experiments, the eciency of the heuristic algorithm is assessed.

cloud computing is the latest technology that involves distributed computation over the internet. it meets the needs of users through sharing resources and using virtual technology. the workflow user applications refer to a set of tasks to be processed within the cloud environment. scheduling algorithms have a lot to do with the efficiency of cloud computing environments through selection of su...

abstract— in this paper we have tried to develop an altered version of the artificial bee colony algorithm which is inspired from and combined with the meta-heuristic algorithm of firefly. in this method, we have tried to change the main equation of searching within the original abc algorithm. on this basis, a new combined equation was used for steps of employed bees and onlooker bees. for this...

in the science of operation research and decision theory, selection is the most important process. selection is a process that studies multiple qualitative and quantitative criteria, related to the science of management, which are mostly incompatible with each other. the multi criteria selection of a renewable energy portfolio is one of the main issues considered in multi criteria literature. i...

the main aim of this paper intends to discuss the solution of fuzzy sylvester matrix equation

basal cell carcinoma (bcc) is the most common cancer of the skin. definite diagnosis usually requires histological examination but recently it has been suggested that cytological examination of skin smear can be used as an alternative. to evaluate sensitivity and specificity of cytological examination, a total of 125 skin lesions, clinically suspected to be bcc were studied. cytological samples...

this paper proposes a novel hybrid algorithm namely apso-bfo which combines merits of bacterial foraging optimization (bfo) algorithm and adaptive particle swarm optimization (apso) algorithm to determine the optimal pid parameters for control of nonlinear systems. to balance between exploration and exploitation, the proposed hybrid algorithm accomplishes global search over the whole search spa...

PURPOSE In recent years, many reports have focused on clinical changes in the oral cavity of orthodontic patients, manifested in general inflammation of the mucosa. In order to better understand histopathological alterations in the mouth and the use of easily available diagnostic material, we decided to assess the morphology of salivary cells at different time points of treatment with orthodont...

BACKGROUND Rosai-Dorfman disease (RDD) is a rare benign idiopathic histiocytic proliferation. Most commonly reported cases are lymph nodal. Only 30-40% of cases occur in extranodal sites. Although the morphological features of RDD are well documented, there is limited information about the morphometric variations in the histiocytes of this entity. METHOD Twenty-two cases of RDD diagnosed on f...

AIMS To determine the frequency of immature haemopoietic cells in the peripheral blood of healthy persons. METHODS Cytocentrifuge preparations were made using mononuclear leucocytes separated by a Ficoll-Hypaque density gradient. The slides were stained by May-Grünwald-Giemsa. The combination with immunoperoxidase technique allowed immunotyping of uncommon blood cells. RESULTS Blast cells e...