68results about How to "Evenly compensated" patented technology

The invention provides a power transformer active noise control method based on convex combination adaptive filters so as to harmonize conflict between convergence speed and steady-state error in a power transformer active noise control algorithm. In the combination filters, one filter adopts a variable-step-size FxLms algorithm based on a versiera function to enable faster convergence speed and time-varying tracking performance to be obtained in the system operation early stage; and while the other filter adopts a fixed-small-step-size FxLms algorithm to ensure small steady-state error after system convergence, and meanwhile, to compensate the stabilization problem of the variable-step-size algorithm due to step change under the steady state. In combination coefficient selection, the modified versiera function is utilized to replace a conventionanl Sigmoid function, thereby preventing exponent operation, reducing system calculation complexity, and improving sensitiveness of combination coefficients to overall errors; the algorithm is allowed to have fast convergence performance, and meanwhile, can obtain smaller steady-state error; and compared with the conventional algorithm, the method has better overall performance.

The invention discloses a large-compensation-amount heating and ventilation pipeline construction method. A large-compensation-amount heating and ventilation pipeline comprises a large-compensation-amount pipeline compensator and heating and ventilation pipeline bodies arranged at the two ends of the pipeline compensator correspondingly, connecting discs are fixedly arranged at the two ends of the pipeline compensator, and flanges are fixedly arranged at the ends, close to the pipeline compensator, of the heating and ventilation pipeline bodies. According to the large-compensation-amount heating and ventilation pipeline construction method, the heating and ventilation pipeline bodies and the pipeline compensator can be conveniently, rapidly and stably installed and fixed, the situation that the connecting positions of the heating and ventilation pipeline bodies and the pipeline compensator are loosened and leak due to thread loosening in the follow-up process is prevented, and therefore normal use of the heating and ventilation pipeline bodies in the follow-up compensation process is guaranteed; and meanwhile, the compensation process can be very stable, the defect that the stability is poor in the using process due to the fact that the compensation action is too large in the past is overcome, the structure is simple, and operation and use by people are facilitated.

A method for compensating an automatic exposure of a camera in a mobile communication terminal. The method includes determining a presumptive error value based on an average luminance value of an input current image frame and a particular target luminance value, selecting a convergent coefficient value based on the determined presumptive error value, determining a weight value of an adaptive filter based on the determined convergent coefficient value, and determining an exposure value for a next image frame based on the selected weight value, the determined presumptive error value and the exposure value of the current image frame.