In this paper, BaCe1− x La x O3− δ (x = 0.05, 0.1, 0.2, 0.3) oxides were calcined at 1100 °C for 5 h and further sintered at 1550 °C for 5 h via a citrate-nitrate combustion method. The crystal structure, conductivity, and chemical properties were investigated by X-ray diffraction (XRD),...

Deep learning model has great potential and advantages in modeling the relations between stocks and helping trading on financial market. This paper studies the application of deep learning, reinforcement learning and graph neural network methods in portfolio optimization. A graph reinforcement...