Observation and Numerical Simulation of Heterogenous Underlying Surface Boundary Layer (II): Numerical Simulation of Inverse Humidity Phenomenon
Bascd on the whole physical of inverse humidity given in literature, a new scheme of land-surface process parameterization is designed. The new scheme has successfully simulated appearing the inverse humidity phenomenon in desert near oasis. The simulated result is coincident with the observed ones, so that the new scheme of land-surface process parameterization is feasible. These conclusions are beneficial to study heterogeneous land-surface process.
The first step of the /spl Hscr//sub /spl infin// loop shaping design procedure is to specify desired closed loop performance by shaping the singular values of the nominal plant with a pre- and/or a post-compensator. Designers usually choose diagonal weighting functions but it is not always possible to obtain the desired loop shape with diagonal weights. This paper develops a systematic procedure for designing nondiagonal pre- and post-compensators. Such nondiagonal weighting functions enable the designer to shape each singular value of the nominal plant separately. To illustrate the procedure an /spl Hscr//sub /spl infin// loop shaping controller is designed for a plant whose singular values can not be shaped accurately using diagonal weights.