for fighting with blights and studying on effect of thickness, two experiments were done. the first series were included independent variable ages of blight in four levels (age1,age2,age3 and age4) and the thermal care temperature in four levels(10,15,20 and 30 seconds) and the dependent variable is death rate . the second series were included independent variables thermal care temperature in t...

in this article, a numerical approximation to the solution of the newell-whitehead equation (nwe) and cauchy problem of ill-posed non-linear diffusion equation have been studied. the presented scheme is obtained by using the derivative of the cubic b-spline quasi-interpolation (bsqi) to approximate the spatial derivative of the dependent variable and first order forward difference to approximat...

The purpose of this research was to assess the role of educational factors in protecting urbanlandscapes in Tehran Metropolitan. This is a quantitative research, applied and descriptivecorrelationmethod was used. The research population consisted of all participants in educationalcourses held by Tehran municipality (N=300) and 172 of them selected by using simple randomsampling method. To gathe...

the purpose of this article was to study, from a sociological point of view, the factors affecting commitment of shiraz high school students to religious values. the study was carried out within the theoretical framework of weber, parsons, inghart and mead. the data was collected through a questionnaire from a sample of 380 high school students in shiraz in the academic year 2001-2002. independ...

Researchers are often interested in the relationship between two variables, with no single data set containing both. A common strategy is to use proxies for dependent variable that surveys impute into independent variable. We show commonly employed regression or matching-based imputation procedures lead inconsistent estimates. offer a consistent and easily-implemented two-step estimator, “re-sc...

In this paper, a new method for estimating the linear regression coefficients approximation is presented based on Z-numbers. In this model, observations are real numbers, regression coefficients and dependent variables (y) have values ​​for Z-numbers. To estimate the coefficients of this model, we first convert the linear regression model based on Z-numbers into two fuzzy linear regression mode...

Results of electro-thermo-elastic analysis of a functionally graded thick-walled spherical shell made of temperature dependent materials are presented in this article. All material properties are assumed temperature-dependent and also are graded along the thickness direction based on power function. Temperature dependency is accounted for all material properties including, thermal, mechanical a...