We consider the problem of estimation the population mean of the study variate Y in presence of measurement errors when information on an auxiliary character X is known. A class of estimators for population means using information on an auxiliary variate X is defined. Expressions for its asymptotic bias and mean square error are obtained. Optimum conditions are obtained for which the mean...

Wearing spectacles was a province of adults over 40 years age till half century earlier. Now we find more children and adolescents wearing spectacles. There have been dramatic rise both in prevalence as well as progression of refractive errors especially myopia in children and adolescents. Various studies in Asian population demonstrate a rise in refractive error (RE) among school and college s...

Multiplication and square are elementary mathematical operations extremely important for core computing process. Also exponentiation, the process of raising a base number to a power is an important operation in many numerical computations. To keep pace with the technology, high speed applications require faster methods of multiplication and Square architecture. This paper reports a new faster a...

pending on the laboratory. Smaller laboratories analyze the sample on a direct ISE system for Na , K , and Cl , and then forward the remaining sample to the nearest laboratory in the network with the capacity for ultracentrifugation and analysis of the remaining requested test profile. In the larger laboratories equipped with Airfuges, the sample is ultracentrifuged, and all results, including ...

This paper presents the design of the hybrid PID-ANFIS controller for controlling the speed of the Brushless Direct Current Motor (BLDCM). The objective of this work is to obtain the BLDCM speed controller equipment effectively. The hybrid PID-ANFIS controller is a combination of classical PID controller and ANFIS controller. This method is applied to BLDCM speed controller by simulation and im...

In the present work, heat exchanger process is selected for investigation, which can be modelled as first order plus dead time model. PI controllers using various tuning techniques that are Ziegler-Nichols, Shinskey, Skogestad, Liptak and Moros have been designed for the selected process. Important time response characteristics and integral error performance indices viz. ISE, IAE and ITAE are c...