Conventional quaternion based methods have been extensively employed for spacecraft attitude control where the aerodynamic forces can be neglected. In the presence of aerodynamic forces, the flight attitude control is more complicated due to aerodynamic moments and inertia uncertainties. In this paper, a robust nero-adaptive quat...

In this paper we investigate the eeects of (uniform) recombination on the evolution of a haploid quasispecies on a single-peak \spike" tness landscape. It is found that at low mutation rates the long-term behaviour of the quasispecies exhibits one stable and one unstable equilibrium. At a critical mutation rate which we identify as an error threshold, the stable and unstable equilibria coalesce...

Nevanlinna theory [Ne] was created to give a quantitative measure of the value distribution for meromorphic functions, for instance to measure the extent to which they approximate a finite number of points. We view a meromorphic function as a holomorphic map ƒ : C —• P into the projective line. The theory has various higher dimensional analogues, of which we shall later consider maps ƒ : C —• X...

Content word deletion has widely been identified as a common error in statistical machine translation systems. We refer to a translation error as “content word deletion” when a content word appears in the reference translation of some sentence, but is absent from the system output translation of that sentence. For our purposes, the term “content word” does not have a precise definition, but rep...