The π∆ production on the nucleon by real and virtual photons is discussed as initial step in a simple model approach for the two pion photoand electroproduction on the nucleon, with emphasis on nucleon resonance excitation which is of interest for new facilities like TJNAF. A calculation for π∆ channel in resonance excitation region is presented and compared to existing experimental data along ...

Robust time-to-contact calculation belongs to the most desirable techniques in the field of autonomous robot navigation. Using only image measurements it provides a method to determine when contact with a visible object will be made. However the computation of the time-tocontact values is very sensitive to noisy measurements of feature positions in a image. Instead of developing a new feature e...

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In view of the characteristics of electromagnetic harmonic movable teeth transmission system, the heat loss has been analyzed in this paper based on basic assumptions. At the same time, the calculation methods of electromagnetic loss and mechanical loss in system have been also discussed. Moreover, the influence of changes of system parameters on electromagnetic loss and mechanical loss has bee...