A Method for Compensating Bellows Pressure Loads while Accommodating Thermal Deformations

Active Filter Control Method Based on Direct Power Control for Compensating Reactive Powers due to Unbalanced Voltages and Nonlinear Loads

Active filters have proven to be more effective than passive techniques to improve power quality and to solve harmonic and power factor problems due to nonlinear loads. This paper proposes a control scheme based on the instantaneous active and reactive power. The inverter of this active filter is a three-phase, two-level converter. Space vector technique is used as modulators and pattern genera...

Canny's compensating pressure theory fails a test.

Canny's compensating pressure theory for water transport (American Journal of Botany 85: 897-909) has evolved from the premise that cavitation pressures are only a few tenths of a megapascal negative (approximately -0.3 MPa). In contradiction, "vulnerability curves" indicate that xylem pressures can drop below -3 MPa in some species without causing a loss of hydraulic conductivity. Canny claims...

Generating electricity while walking with loads.

We have developed the suspended-load backpack, which converts mechanical energy from the vertical movement of carried loads (weighing 20 to 38 kilograms) to electricity during normal walking [generating up to 7.4 watts, or a 300-fold increase over previous shoe devices (20 milliwatts)]. Unexpectedly, little extra metabolic energy (as compared to that expended carrying a rigid backpack) is requi...

active filter control method based on direct power control for compensating reactive powers due to unbalanced voltages and nonlinear loads

active filters have proven to be more effective than passive techniques to improve power quality and to solve harmonic and power factor problems due to nonlinear loads. this paper proposes a control scheme based on the instantaneous active and reactive power. the inverter of this active filter is a three-phase, two-level converter. space vector technique is used as modulators and pattern genera...

A Regular Indirect Boundary Element Method for Thermal Analysis