Numerical and physical experiments on two-dimensional (2D) turbulence show that the differences of transverse components of velocity field are well described by Gaussian statistics and Kolmogorov scaling exponents. In this case the dissipation fluctuations are irrelevant in the limit of small viscosity. In general, one can assume the existence of a critical space dimensionality d=d(c), at which...

High performance robot control algorithms often rely on system physical models. For field robots, the dynamic parameters of these physical models may not be well known. This paper presents a new information based performance metric for the on-line dynamic parameter identification of a multi-body system. The metric is used in an algorithm to optimally regulate the external excitation required by...

We calculate one-loop correction to the two-point functions of curvature perturbation in single-field inflation generated by cubic self-interaction. Incorporating observed red-tilted spectrum perturbation, relevant takes a finite value and inversely proportional spectral tilt. Requiring be much smaller than tree-level contribution leads an upper bound on primordial non-Gaussianity. While observ...