Focusing on the failure of intrusion detection resulted from low captured image width of traditional Wireless Visual Sensor Network (WVSN) target-barrier, a Wireless visual sensor network β Quality of Monitoring (β-QoM) Target-Barrier coverage Construction (WβTBC) algorithm was proposed to ensure that the captured image width is not less than β. Firstly, the geometric model of the visual sensor β-QoM region was established, and it was proven that the width of intruder image captured by the target-barrier of intersection of all adjacent visual sensor β-QoM regions must be greater than or equal to β. Then, based on the linear programming modeling for optimal β-QoM target-barrier coverage of WVSN, it was proven that this coverage problem is NP-hard. Finally, in order to obtain suboptimal solution of the problem, a heuristic algorithm WβTBC was proposed. In this algorithm, the directed graph of WVSN was constructed according to the counterclockwise β neighbor relationship between sensors, and Dijkstra algorithm was used to search β-QoM target-barriers in WVSN. Experimental results show that WβTBC algorithm can construct β-QoM target-barriers effectively, and save about 23.3%, 10.8% and 14.8% sensor nodes compared with Spiral Periphery Outer Coverage (SPOC), Spiral Periphery Inner Coverage (SPIC) and Target-Barrier Construction (TBC) algorithms, respectively. In addition, under the condition of meeting the requirements of intrusion detection, with the use of WβTBC algorithm, the smaller β is, the higher success rate of building β-QoM target-barrier will be, the fewer nodes will be needed in forming the barrier, and the longer working period of WVSN for β-QoM intrusion detection will be.
In order to achieve the stable and precise control of industrial processes with non-linearity, hysteresis, and strong coupling, a new control method based on Local Policy Interaction Exploration-based Deep Deterministic Policy Gradient (LPIE-DDPG) was proposed for the continuous control of deep reinforcement learning. Firstly, the Deep Deterministic Policy Gradient (DDPG) algorithm was used as the control strategy to greatly reduce the phenomena of overshoot and oscillation in the control process. At the same time, the control strategy of original controller was used as the local strategy for searching, and interactive exploration was used as the rule for learning, thereby improving the learning efficiency and stability. Finally, a penicillin fermentation process simulation platform was built under the framework of Gym and the experiments were carried out. Simulation results show that, compared with DDPG, the proposed LPIE-DDPG improves the convergence efficiency by 27.3%; compared with Proportion-Integration-Differentiation (PID), the proposed LPIE-DDPG has fewer overshoot and oscillation phenomena on temperature control effect, and has the penicillin concentration increased by 3.8% in yield. In conclusion, the proposed method can effectively improve the training efficiency and improve the stability of industrial process control.