In many organizations and financial institutions, we don't always have acsses to inputs and outputs to evaluate the decision-making units (DMUs), but rather only a ratio of inputs to outputs ( or reverse) might be available. In DEA, cost efficiency determines input standards based on input costs. In multi-stage network DEA processes, in addition to input standards, cost efficiency would determi...

Dairy wastewater is enriched in organic matter (about 45-72 g/l, COD) and also contains biodegradable carbohydrates. A three-stage system, NRBC was fabricated as a bench scale unit for lab experiments, to remove organic carbon from the whey. The fabricated NRBC had several advantages, such as quick start-up, high biomass concentration and was additionally able to handle high organic loading rat...

the effect of drought stress on yield and components of three varieties of autumnal rapeseed in the south ‎eastern region of isfahan, utilizing four irrigation regimes (i.e. no irrigation from flowering stage on, no ‎irrigation from the podding stage on, no irrigation from grain filling stage on, and a normal irrigation regime ‎after 80 mm evaporation from class a evaporation tube) were studied...

A controversial technique for testing the hypothesis that physicians induce demand involves two stage least squares (TSLS) regression analysis of cross-section data on physician supply and utilization. This paper tests the power of TSLS by applying it where there is at most only a trivial amount of demand inducement--the demand for childbirths. We find 'evidence' of inducement of childbirths, c...

In this study, we propose a three-stage weighted sum method for identifying the group ranks of alternatives. In the first stage, a rank matrix, similar to the cross-efficiency matrix, is obtained by computing the individual rank position of each alternative based on importance weights. In the second stage, a secondary goal is defined to limit the vector of weights since the vector of weights ob...

Two new computational models show that the EEG distinguishes three distinct mental states ranging from alert to fatigue. State 1 indicates heightened alertness and is frequently present during the first few minutes of time on task. State 2 indicates normal alertness, often following and lasting longer than State 1. State 3 indicates fatigue, usually following State 2, but sometimes alternating ...

Aiming at the problems of ship plate forming spring-back in theory and experiment, combining the law of sheet metal forming, this paper puts forward a measurement and compensation method of spring-back outside plate of a ship based on the three dimensional NC (numerical control) pressing machine. First, we use Dynaform software for finite element analysis of springback prediction, and then esta...