abstract: one the most important problems in recent sensitive loads is the quality of voltage. for this challenge custom power devices are used in distribution systems. dynamic voltage restorer (dvr) is a custom power device that improves voltage, decrease power distortion, filter harmonics and balance distributed generations (dgs) with low voltage distribution system. in this paper, a new algo...

A ‘centrifugal force’ as experienced by particles in a centrifuge actually reflects the natural tendency of the particle to move in a straight line in the absence of external forces. If we view the experiment in the (fixed) reference frame of the laboratory, we observe that the particle is deflected from a linear trajectory by a centripetal force (directed toward the central axis of the rotor)....

We describe the viscous evolution of a collinear three-vortex structure that corresponds initially to an inviscid point vortex fixed equilibrium, with the goal of elucidating some of the main transient dynamical features of the flow. Using a multi-Gaussian “core-growth” type of model, we show that the system immediately begins to rotate unsteadily, a mechanism we attribute to a “viscously induc...

This thesis develops a nonlinear observer for the problem of pose estimation; that is, the determination of the position and attitude of a rigid body from sensor measurements. The observer is derived on the Special Euclidean group, SE (3), and exploits the natural Lie groups geometry of the space in the structure of the observer. The observer uses body fixed frame measurements of known landmark...

A double stimulus subjective evaluation was performed to determine preferred frame rates at a fixed bit rate for low bit rate video. Stimuli consisted of eight reference color video sequences of size 352 × 240 pixels. These were compressed at rates of 100, 200 and 300 kbps for low, medium, and high motion sequences, respectively, using three encoders and frame rates of 10, 15 and 30 frames per ...

A reference frame F is described by the element g of the Poincaré group P which connects F with a given fixed frame F 0. If F is a quantum frame, defined by a physical object following the laws of quantum physics, the parameters of g have to be considered as quantum observables. However, these observables are not compatible and some of them, namely the coordinates of the origin of F , cannot be...