This research focused on the design of a distributed approach using consensus theory to find an optimal solution economic dispatch problem (EDP) by considering quadratic cost function along with valve-point effect generators and renewable energy systems (RESs). A is presented for under complex accounting solar in addition conventional power plants. By employing beta distribution communication t...

surge is one of the two destructive factors in compressors. surge is the stream instability phenomenon in compressor that imposes severe damages to the compressors. nowadays, suppressingsurge phenomenon is one of the most important issues in oil and gas industries, especially when flow reduction or gas reflux is considered. according to moore-greitzer compressor model, this paper designs an act...

Chronic venous insufficiency (CVI) is widely accepted as the seventh most common chronic debilitating disease and has a huge impact on human health all over the world. In the United States, 10% to 35% of adults are affected by CVI [1]. Venous valve incompetence is a major cause of this disease. When the venous valves become incompetent, blood reflux can occur, which results in blood pooling in ...

a parametric study is performed to assess the influence of the tension reinforcement index, ( ω = ρ fy /f bc), and the bending moment distribution (loading type) on the ultimate deformation characteristics of reinforced concrete (rc) beams. the analytical results for 15 simply supported beams with different amounts of tension reinforcement ratio under three different loading conditions are pres...

In the valve opening control of spacecraft, electro-hydraulic servo position-controlled loading is generally adopted. The nonlinear factors and uncertain interference in system will affect accuracy. order to improve tracking accuracy response speed, model dual-channel valve-controlled symmetrical cylinder position was established. A disturbance observer used estimate unmodeled disturbances syst...

This paper proposes the exchange market algorithm (EMA) to solve the combined economic and emission dispatch (CEED) problems in thermal power plants. The EMA is a new, robust and efficient algorithm to exploit the global optimum point in optimization problems. Existence of two seeking operators in EMA provides a high ability in exploiting global optimum point. In order to show the capabilities ...

Current artificial heart valves either have limited lifespan or require the recipient to be on permanent anticoagulation therapy. In this paper, effort is made to assess a newly developed bileaflet valve prosthesis made of synthetic flexible leaflet materials, whose geometry and material properties are based on those of the native mitral valve, with a view to providing superior options for mitr...

High precision is necessary during percutaneous transcatheter heart valve implantation. The precision of the implantation has been established by increasing the heart rate (usually to 200 beats per minute) to the point of significantly reduced cardiac output and thus minimizing valve movement. Routinely, this tachycardia is induced by rapid pacing. Here we report a case of failure to pace durin...

An approximate numerical^graphical solution was made for the motion of a human aortic valve leaflet in a meridional plane through the center of the sinus of Vabalva. The observed buckling, whipping action of the leaflet was obtained. Of primary significance in the results was the location and the determination of the maximum curvature of the leaflet in this plane, since this point corresponds t...

This paper presents the results of lab-simulated tests on longwall powered supports under dynamic loading conditions. The were carried out a test site, where tested prop was subjected to load using controlled mass falling gravity onto support. support therefore determined based weight used and distance freefall before impact. operating characteristics valve determined, specifying temporary chan...