The performance of geostatistical and spatial interpolation techniques for estimation of spatial variability of heavy metals and water quality mapping of groundwater resources in Ramiyan district (Golestan province- Iran) were investigated. 24 spring/well water samples were collected and the concentration of heavy metals (Ni, Co, Pb, Cd and Cu) was determined using Differential Pulse Polarograp...

study of economic efficiency is of particular significance in evaluation of the public sector of the economy. there two alternative critorias for the measurement of efficiency: namely ratio analysis, and frontier 'analysis. the first criteria takes the ratio of inputs as compared to the outputs. the second criteria, however.first attempts to stablisb the product and cost efficiency frontie...

The main purpose of this research is the study on effect of Financial and Operating Leverage and Venture Capital on Tobin's Q ratio amongst companies listed in Tehran Stock Exchange. In this research, the Holdings and Investment companies are used as statistical samples and 73 enterprises that are listed in Tehran Stock Exchange within 2001 to 2016 have been studied. The results driven by this ...

abstract t he relationship between public sector deficits and inflation is one of the important and controversial issues in the academic literature as well as in economic policy field. on the other hand, a major objective of macroeconomic policies is to foster economic growth and to keep inflation on a low level. so keeping the price stability plays an important role in determining the growth r...

Abstract T he relationship between public sector deficits and inflation is one of the important and controversial issues in the academic literature as well as in economic policy field. On the other hand, a major objective of macroeconomic policies is to foster economic growth and to keep inflation on a low level. So keeping the price stability plays an important role in de...

background: iran is one of the countries that has ratified the world health organization framework convention of tobacco control (who-fctc), and has implemented a series of tobacco control interventions including the comprehensive tobacco control law. enforcement of this legislation and assessment of its outcome requires a dedicated evaluation system. this study aimed to develop a generic model...

In this paper, a novel stator current based Model Reference Adaptive System (MRAS) estimator for speed estimation in the speed-sensorless vector controlled induction motor drives is presented. In the proposed MRAS estimator, measured stator current of the induction motor is considered as a reference model. The estimated stator current is produced in an adjustable model to compare with the measu...

This paper discusses a state space estimation for an electromechanical actuator valve using extended Kalman filter (EKF). A proposed actuator model includes a Tustin’s friction model with strong nonlinearities, hence it represents an accurate model for describing the friction phenomenon in an electromechanical actuator valve. At first the state equations of the model were converted into a time-...