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This paper adopts a new guidance and control framework to address the problem of 3D trajectory tracking for an under-actuated autonomous underwater vehicle (AUV). First, based on the error dynamics in the time-dependent trajectory frame, the desired surge speed, pitch angle and yaw angle of the AUV are deduced in kinematics by the improved Line-of-Sight (LOS) guidance law that makes full use of the...
The paper presents a real-time and reliable communication system for a newly developed hybrid underwater robotic vehicle (HURV). The surface monitoring station of the HURV is linked with the onboard underwater control system by a fine and neutral buoyance fiber, which enables the state monitoring and tele-operation mode of the vehicle based on the industrial Ethernet Modbus/TCP via the fiber-optic...
Considering a two-period, two-part supply chain consisting of one supplier and multi-retailers, this paper studies the effects of stock sharing among retailers on the supply chain. By establishing analysis model and using simulation method, the effects of stock sharing mode and also the traditional mode without stock sharing on retailer, supplier and the whole supply chain’s performance are analyzed...
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