Probabilistic guarantees of safety and performance are important in constrained dynamical systems with stochastic uncertainty. We consider the reachability problem, which maximizes probability that state remains within time-varying constraints (i.e., a “target tube”), despite bounded control authority. This problem subsumes viability terminal hitting-time reach-avoid problems. Of special intere...

in this paper effects of fractured sleepers on rail track vibration under moving wheelset have been investigated. two parallel rails of the track have been modeled as euler-bernoulli beams on elastic points as rail pads. also sleepers have been modeled as visco-elastic euler-bernoulli beams. it is assumed that, some sleepers under the rail track have been fractured and modeled by two beams. the...

this paper studies the role of the conceptual models of the policy makers in the quality of prioritizing problems in the agenda setting stage of public policy cycle.  several factors contribute to perceiving problems, presenting clear definitions of them, prioritizing them and then problem setting in the format of agenda for policy makers. however, expecting to examine the theories of enactment...

magnetic susceptibility has been extensively used to determine the magnetic properties of rocks for different applications, such as hydrocarbon or mineral explorations. this magnetic quantity can be directly measured in an accurate but time-consuming operation, or it can be mathematically approximated using a reliable procedure to achieve a desired accuracy. the poisson theory is one of the mos...