Variable speed wind turbines are designed to follow wind speed variations in low winds in order to maximize aerodynamic efficiency. Unfortunately, uncertainty in the aerodynamic parameters may lead to sub-optimal power capture in variable speed turbines. Adaptive generator torque control is one method of eliminating this suboptimality; however, before adaptive control can become widely used in ...

ABSTR4CT-The purpose of tliis paper is to prcsellt a solution to the n~ininlization prohlenl of the transient time to accomplish the switching hetween different levels of power in a nuclear research reactor satislying the inverse period cons~rairtt and avoiding to use any physical model of the plant. 'l'be strategy liere proposed consists of two stazes. first. the optinul trajectory which satis...

Given a set A ={a1, . . . ,an} of n image points and a set B ={b1, . . . ,bn} of n model points,the problem is to find a transformation matching (a one-to-one mapping) each point a ∈ A tosome point b ∈ B such that the length of the longest edge in the matching is minimized (so-calledbottleneck distance). The geometric transformations we allow are translation, rot...

Low-grade waste heat conversion to electricity has drawn much attention toward reduction of production cost (Matsuura, Rowe et al. 1992, Rowe 1995, Ebrahimi, Jones et al. 2014). Organic Rankine cycle has been recently proved as a feasible solution with about 7% thermal efficiency and initial cost of about $2/watt for a high temperature of 116 °C and low temperature of 25 °C (Imran, Park et al. ...

The effect of draining crop fields during the wheat season on the soil CH4 andN2O emissions during the rice season in this article. There were four treatments:traditional cultivation during the wheat season + cultivation without fertilizationduring the rice season (CK1 field), traditional cultivation during the wheat season +traditional cultivation during the rice season (CK2 field), draining t...

climate is one of the most important factors that influence the quality and quantity of crops. understanding the natural features of any region, especially about the climate, can play a major role in making plans and land use planning. sugar beet, is one of the major industrial plants, that in addition to producing one of the most fundamental basic needs of society, namely sugar, it can have ot...

The abundances of nine transcripts predicted to encode lignocellulose-modifying enzymes were measured over the course of Phanerochaete carnosa cultivation on four wood species. Profiles were consistent with sequential decay; transcripts encoding lignin-degrading peroxidases featured a significant substrate-dependent response. The chitin synthase gene was identified as the optimal internal refer...