The ground state pairing correlations in finite fermionic systems are described with a high degree of accuracy within variational approach based on combined coupled-cluster and particle-number-projected BCS ansatz. flexibility this symmetry-preserving wavefunction enables unified picture valid from weak to strong coupling, both small large systems. present consistently yields an energy upper bo...

Estimation of energy loss is an essential task for both operation and planning in electric distribution systems. The energy losses are considered to be uncertain due to measurements. A new method based on fuzzy-c-number clustering and fuzzy multiple linear regression analysis is proposed for developing energy loss formulas to estimate losses in this paper. The proposed method is implemented wit...

background and objectives: evaluation of the grain yield and yield components and also morphological traits can help to identify strategies for selection of resistant cultivars and increased crop yield production under heat stress condition. to this end, in experiment to evaluate of grain yield and yield components on 42 rice lines tolerant to heat stress from international rice research instit...