This paper presents a new approach for solution of the economic load dispatch (ELD) problem with valve-point effect using a modified particle swarm optimization (MPSO) technique. The practical ELD problems have non-smooth cost function with equality and inequality constraints, which make the problem of finding the global optimum difficult when using any mathematical approaches. In this paper, a...

The problem of power system optimization has become a deciding factor in current power system engineering practice with emphasis on cost and emission reduction. The economic and emission dispatch problem has been addressed in this paper using two efficient optimization methods, Artificial Bee Colony (ABC) and Particle Swarm Optimization (PSO). A hybrid produced from these two algorithms is test...

the history of closed mitral valve comissurotomy (cmvc) and its indication is discussed in this article. however many of the patients undergo (ptmc) these days as a new procedure and of course more effective and easier way whenever is indicated, yet, (cmcv) should be considered as a simple, and effective surgery when indicated, especialy in third world countries in which economical, social and ...

IMPORTANCE The stairstep graft is a novel method to modify the lateral anchoring point of lateral grafts for nasal valve correction. OBSERVATIONS Eight consecutive patients with a diagnosis of nasal valve collapse were included in the study. The novel method of stairstep grafts was performed to reinforce the lateral crus and to widen the nasal valve. Postoperative evaluations were performed b...

Valve positioner is the core component of pneumatic control valve. A new software and hardware design scheme intelligent valve presented in this paper. The circuit composition each part introduced part. Based on it, a solution to realize HART ‘multi-point’ communication proposed research. In design, novel combined PID algorithm solve nonlinear problem caused by friction between stem packing dur...

Aim Contemporary data comparing early versus newer generation transcatheter heart valve (THV) devices in routine clinical practice are lacking. We sought to compare the safety and efficacy of early versus newer generation THVs in unselected patients undergoing transcatheter aortic valve implantation (TAVI). Methods and results We performed a propensity score matched analysis of patients under...