This article describes the first steps done into the direction of an four dimensional assimilation scheme (4DDA) for the retrieval of snow pack properties from passive microwave remote sensing. The scheme assimilates passive microwave remote sensing observation into a physical based snow model. Simulated annealing is used to minimize the cost function.

The integration theory of reactive behaviours is discussed. A linear emerging model is adopted where the motion of a robot is represented as the weighted linear sum of reactive behaviours. The weights are defined as differentiable nonlinear functions of sensor signals and parameters. We propose approaches toward skill learning and skill abstraction based on the sensor space model, where the parameters are systematically tuned through iteration of trials such that the sensor signals converge to the given teacher signals. The learning algorithm and the abstraction algorithm are experimentally applied to the reactive grasp of a three-fingered robot hand. The experimental results illustrate the effectiveness of the proposed algorithms.