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Traditional visual simultaneous localization and mapping (SLAM) systems are primarily based on the assumption that the environment is static, which makes them struggle with the interference caused by dynamic objects in complex industrial production environments. This paper aims to improve the stability of visual SLAM in complex dynamic environments through semantic segmentation and its optimization.

This paper proposes a real-time visual SLAM system for complex dynamic environments based on YOLOv5s semantic segmentation, named YLS-SLAM. The system combines semantic segmentation results and the boundary semantic enhancement algorithm. By recognizing and completing the semantic masks of dynamic objects from coarse to fine, it effectively eliminates the interference of dynamic feature points on the pose estimation and enhances the retention and extraction of prominent features in the background, thereby achieving stable operation of the system in complex dynamic environments.

Experiments on the Technische Universität München and Bonn data sets show that, under monocular and Red, Green, Blue - Depth modes, the localization accuracy of YLS-SLAM is significantly better than existing advanced dynamic SLAM methods, effectively improving the robustness of visual SLAM. Additionally, the authors also conducted tests using a monocular camera in a real industrial production environment, successfully validating its effectiveness and application potential in complex dynamic environment.

This paper combines semantic segmentation algorithms with boundary semantic enhancement algorithms to effectively achieve precise removal of dynamic objects and their edges, while ensuring the system's real-time performance, offering significant application value.

This paper compares the characteristics of reverse logistics in the publishing industry among China, Hong Kong, and Taiwan.

A multiple‐case approach in combination with EIQ (entry of order, items, and quantity) analysis is selected to allow analytical generalization of the findings.

The research findings show that the reverse logistics of Chinese publications is still in early stage and is not mature enough to be interconnected in China, Hong Kong, and Taiwan. The reverse logistics cost in these areas is unlikely to be significantly reduced in the near future.

Instead of making effort to process returned goods, logistics firms or publishers may consider discarding the returned goods directly. The loss on material cost is far less than the manpower spent on processing. Also, publishers can sort returned goods in off‐peak season to save cost on reverse logistics.

This research provides the first empirical study by applying EIQ analysis to understand the challenges of reverse logistics in the publishing industry in China, Taiwan, and Hong Kong, which has been rarely discussed in the past.