Daofang Chang

Jul 13, 2023 | mdpi.com | Yinping Gao |Chun-hsien Chen |Daofang Chang

5.3. Comparison of Different ApproachesDifferent approaches are compared in this section to verify the effectiveness of the QL-CNP algorithm. The proposed QL-CNP algorithm was used to solve the MADP in this study. Furthermore, the general contract net algorithm (CNA) and Dijkstra algorithm were also compared to conduct performance analysis of different approaches. Dijkstra is a classical shortest-path algorithm that is usually used to find optimal routes [44].

Mar 28, 2023 | mdpi.com | Fang Wang |Yu Wang |Daofang Chang

3.1. Problem DescriptionThe order picking process of the “parts-to-picker” system is shown in Figure 2 below. For the customer order set obtained from the e-commerce information system, the system first performs order allocation, including order batching and batch allocation, and establishes a correspondence between orders and picking stations. Workload balancing is essential as we consider multiple picking stations working in parallel in this paper.

Mar 20, 2023 | mdpi.com | Xuan Liu |Daofang Chang

Abstract:In this paper, the essence and optimization objectives of the hull parts path optimization problem of CNC laser cutting are described, and the shortcomings of the existing optimization methods are pointed out. Based on the optimization problem of the hull parts CNC laser cutting path, a new part-cutting constraint rule based on partial cutting is proposed, which aims to overcome the drawbacks of the traditional algorithms with serial cutting constraint rules.