نتایج جستجو برای: power coefficient

تعداد نتایج: 644239  

2008
Francis A. Méndez Mediavilla Frank Landram Vivek Shah

The coefficient of determination, R, is widely used as a measure of fit for model selection and variable selection. However, R does not offer any insight about the quality of the predicted values or the potential influence of particular observed values on the predicted values. In regression analysis, statistical procedures such as t test, F test, and prediction intervals provide insight into th...

2015
S. S. Devi S. Ahmad V. N. Ojha

CSIR-National Physical Laboratory (NPL) India is a National Metrology Institute (NMI), which disseminate traceability of the physical parameters in the country. In the field of microwave, it is one of the apex laboratories to provide traceability. In this paper, the method for precession measurement of effective source reflection coefficient using resistive power splitter and mismatch uncertain...

Journal: :Transactions of the Japan Society of Mechanical Engineers 1957

2012
Y. H. Wijnant E. R. Kuipers A. de Boer

The acoustic absorption coefficient is a number that indicates which fraction of the incident acoustic power impinging on a surface is being absorbed. The incident acoustic power is obtained by spatial integration of the incident intensity, which is (classically) defined as the time-averaged intensity associated with the incident sound field. The measurement of the effective, in situ, sound abs...

Journal: :IOP Conference Series: Materials Science and Engineering 2021

Ebrahim Hajidavalloo,

There is a demand for reduced power consumption in the vapor compression refrigeration cycle. Coefficient of performance of window-air conditioners considerably decreases and power consumption increases under very hot conditions. These problems have encouragecl studies aimed at improving the performance of window-air-conditioners by enhancing the heat transfer rate in the condenser. In this ar...

2013
Almas Heshmati Subal C. Kumbhakar Kai Sun

Estimation of Productivity in Korean Electric Power Plants: A Semiparametric Smooth Coefficient Model This paper analyzes the impact of load factor, facility and generator types on the productivity of Korean electric power plants. In order to capture important differences in the effect of load policy on power output, we use a semiparametric smooth coefficient (SPSC) model that allows us to mode...

2015
M. THESBERG M. POURFATH N. NEOPHYTOU H. KOSINA

Energy filtering has been put forth as a promising method for achieving large thermoelectric power factors in thermoelectric materials through Seebeck coefficient improvement. Materials with embedded potential barriers, such as cross-plane superlattices, provide energy filtering, in addition to low thermal conductivity, and could potentially achieve high figure of merit. Although there exist ma...

Journal: :CoRR 2012
Arash Gholami Davoodi Mohammad Javad Emadi Mohammad Reza Aref

 Abstract—In this paper optimum power allocations are derived for a fading decode-and-forward full-duplex relay channel, analytically. Individual power constraints for the source and the relay are assumed and the related optimization problem is analyzed for two scenarios. First, optimization is taken over the source power, the relay power, and the correlation coefficient between the transmitte...

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