abstract in this research, a radial basis function artificial neural network (rbf-ann) model was developed to predict the hot deformation flow curves of api x65 pipeline steel. the results of the developed model was compared with the results of a new phenomenological model that has recently been developed based on a power function of zener-hollomon parameter and a third order polynomial functio...

To characterize the dynamic mechanical response of rocks during initiation and propagation cracks at a high strain rate, strain-rate cohesive fracture model is established based on Lennard-Jones potential multi-scale rocks. The newly proposed explains micro-mechanism rate effect from molecular scale establishes energy function force function. First, it that arises due to change microscopic prop...

A common belief in phenomenological strain gradient plasticity modeling is that including the of scalar variables constitutive setting leads to size-dependent isotropic hardening, whereas second-order tensors induces kinematic hardening. The present paper shows it also possible produce hardening using scalar-based theory. For this purpose, a new model involving equivalent plastic developed and ...

background: the two most frequently diagnosed cancers among women worldwide are breast and cervical cancers. the objective of the present study was to classify the different countries based on the death rates from sex specific cancers. methods : in this cross-sectional study, we used dataset regarding death rate from breast, cervical, uterine, and ovarian cancers in 190 countries worldwide repo...

background: the success of faculty members of medical sciences universities in medical education arena requires qualification and capabilities authentication in relation with education.  in order to achieve these capabilities, it is necessary to use new and influential approaches of empowerment. one of the appropriate approaches is “competency based training” (cbt). in this method, competencies...

In this paper, two new quadrilateral elements are formulated to solve plane problems. Low sensitivity to geometric distortion, no parasitic shear error, rotational invariance, and satisfying the Felippa pure bending test are characteristics of these suggested elements. One proposed element is formulated by establishing equilibrium equations for the second-order strain field. The other suggested...

With the complexity and amount of information in a wide variety of comparative performance reports in poultry production, making a decision is difficult. This problem is overcomed only when all data can be put into a common unit. For this purpose, five different decision making analysis approaches including  Maximin, Equally likely, Weighted average, Ordered weighted averages and Technique for ...

The finite element method (FEM) can be applied to practically analyze the tall buildings in which the shear walls are used to resist the lateral loads. Accordingly, a variety of displacement and strain-based as well as frame macro elements have been proposed for analysis of the tall buildings. With respect to application of the lower order plane stress elements, analytical problems may arise wi...