background: bone sarcomas are the most common malignancies of bone tissues in children, and are classified intotwo groups as osteosarcoma and ewing’s sarcoma. treatment and prognosis depend on the subtype and grade ofthe tumor. the goal of this study was to evaluate the features bone sarcoma in patients referred to mahak childrenhospital since 2007 to 2009.materials and methods: this was a retr...

the research has been conducted with purpose of composing the main constituent of pathology for national center of persian carpet and considering it's role in exporting handmade carpet. the respective model of pathology was selected, out of 14 approved models (the six boxes model of wisboard). the method of this research is explanatory and is a kind of correlation one. 89 people from natio...

Abstract   Many parameter-tuning algorithms have been proposed for training Fuzzy Wavelet Neural Networks (FWNNs). Absence of appropriate structure, convergence to local optima and low speed in learning algorithms are deficiencies of FWNNs in previous studies. In this paper, a Memetic Algorithm (MA) is introduced to train FWNN for addressing aforementioned learning lacks. Differential Evolution...

Constraint propagation is a general algorithmic approach for pruning the search space of a constraint satisfaction problem. In a uniform way, K. R. Apt [1] has defined computation as an iteration of reduction functions over a domain. In [2], he has also demonstrated the need for integrating static properties of reduction functions (commutativity and semi-commutativity) to design specialized alg...

in this work, several machine learning techniques are presented for nanofiltration modeling. according to the results, specific errors are defined. the rejection due to nanofiltration increases with pressure but decreases with increasing the concentration of chloride ion. methods of machine learning represent the rejection of nanofiltration as a function of concentration, ph, pressure and also ...

due to the being in the desert bar and ecosystem sensitivity to water , water management in the agricultural sector of the iran is one of the priorities of managers and planners of this section. therefore accurate modeling of the production function, for policies to increase efficiency and reduce the use of inputs, as well as forecasts for the timely supply with low cost, is of utmost importanc...