wind power has been widely considered in recent years as an available and a clean renewable energy source. the cost of wind energy production is currently the main issue, and increasing the size of wind turbines can reduce wind energy production costs. hence, megawatt wind turbines are being rapidly developed in recent years. in this paper, an aerodynamic analysis of the nrel 5mw turbine is car...

Research advances in digital factory design has led to a number of simulation techniques and tools which have the capability to represent aspects of the lifecycle of manufacturing systems. Although this is the case, analysis of key performance indicators (such as cost) are not very advanced when compared with other digital manufacturing simulation applications. To address this gap, this paper p...

In the development of eecient parallel applications, reliable performance predictions are essential. However, many performance modelling formalisms, such as queueing networks, are not directly suitable for modelling parallel applications, while for other formalisms the analysis is too expensive. We present a methodology for performance modelling of parallel processing systems (Glamis), based on...

In the development of e cient parallel applications, reliable performance predictions are essential. However, many performance modelling formalisms, such as queueing networks, are not directly suitable for modelling parallel applications, while for other formalisms the analysis is too expensive. We present a methodology for performance modelling of parallel processing systems (Glamis), based on...

State transition matrices as used in standard HMM decoders have two widely perceived limitations. One is that the implicit Geometric state duration distributions which they model do not accurately reflect true duration distributions. The other is that they impose no hard limit on maximum duration with the result that state transition probabilities often have little influence when combined with ...

Decisions during the reliability growth development process of engineering equipment involve trade-offs between cost and risk. However slight, there exists a chance an item of equipment will not function as planned during its specified life. Consequently the producer can incur a financial penalty. To date, reliability growth research has focussed on the development of models to estimate the rat...

the conventional method towards deriving schedule for a fleet of ships to minimize cost alone has the short-coming of not addressing the problem of operation revenue losses associated with delays during maintenance at ships dockyards. in this paper, a preventive maintenance schedule for a fleet of ships that incorporates op-portunity cost is presented. the idea is to assign a penalty cost to al...

the current study attempted to investigate the mathematical sturcuture of cost function of irrigated wheat crop in kurdistan province. the methodolgy is based on duality assumption. the sample size is 257 farmers for the agricultural year 2011-2012.data was collected byinterviewwith farmers and writing writerquestionnaire.the multistage cluster random sampling used. the results showed that, the...

The purpose of this paper is to estimate the welfare cost of inflation in Iran. We first use the long-horizon regression approach developed by Fisher and Seater (1993) to obtain an estimate of the inflation rate elasticity of money demand and then the Baily’s consumer surplus approach to calculate the welfare cost function. The results show that reducing inflation rate from 40% to 0% increases ...