1. Achiam, J., Held, D., Tamar, A., Abbeel, P., 2017. Constrained Policy Optimization.
2. Deep reinforcement learning a brief survey;Arulkumaran;IEEE Signal Process Mag.,2017
3. An assessment of available measures to reduce traction energy use in railway networks;Douglas;Energ. Conver. Manage.,2015
4. 3D-monitoring big geo data on a seaport infrastructure based on FIWARE;Fernandez;J. Geogr. Syst.,2018