3 research outputs found
Towards Autonomous Pipeline Inspection with Hierarchical Reinforcement Learning
Inspection and maintenance are two crucial aspects of industrial pipeline
plants. While robotics has made tremendous progress in the mechanic design of
in-pipe inspection robots, the autonomous control of such robots is still a big
open challenge due to the high number of actuators and the complex manoeuvres
required. To address this problem, we investigate the usage of Deep
Reinforcement Learning for achieving autonomous navigation of in-pipe robots in
pipeline networks with complex topologies. Moreover, we introduce a
hierarchical policy decomposition based on Hierarchical Reinforcement Learning
to learn robust high-level navigation skills. We show that the hierarchical
structure introduced in the policy is fundamental for solving the navigation
task through pipes and necessary for achieving navigation performances superior
to human-level control
The influence of the removal of specific NOM compounds by anion exchange on ozone demand, disinfection capacity, and bromate formation
This research on a pilot scale focuses on the reaction of ozone with natural organic matter (NOM) for three water qualities with different dissolved organic carbon (DOC) concentrations and NOM compositions, obtained after several stages of an anion exchange process. It was shown that for the same ozone dosage per DOC, the ozone demand was higher, less bromate was formed and a lower disinfection capacity was reached for water containing mainly humic substances, than for water where the humic substances were partly removed. It can be concluded that NOM composition, specifically the humic substances, influences the ozone demand, disinfection capacity and bromate formation