In this paper we develop a polynomial-time approximation scheme for a particular
case of the two-machine flow shop scheduling problem with several availability
constraints on the second machine under the resumable scenario.
Tineke Goessens, Benny Malengier, Pei Li, Rob H. De Staelen
Most practical textile models are based on a two scale approach: a
one-dimensional fiber model and a fabric model, see Fan et al. (Commun Comput
Phys 4(4):929–948, 2008). No meso-level is used in between, i.e. the yarn scale
is neglected in this setup. For dense textile substrates this seems appropriate
as the yarns connect everywhere, but for loose fabrics or scrims this approach
cannot be kept. ... hiện toàn bộ
In this paper a class of linear time-varying control systems is considered. The
time variation consists of a scalar time-varying coefficient multiplying the
state matrix of an otherwise time-invariant system. Under very weak assumptions
of this coefficient, we show that the controllability can be assessed by an
algebraic rank condition, Kalman canonical decomposition is possible, and we
give a met... hiện toàn bộ