In the lesson note "Reassigning object data type variables" the first sentence is fairly clunky and awkward to read. I would suggest replacing it with something like "When we mutate an object that is ...

Abstract: Object detection from remote sensing images is a key technology for Earth observation applications, which has important scientific research value. Ground objects in remote sensing images ...

Abstract: Oriented object detection has broad utilization in many fields, including urban traffic monitoring, land utilization assessment, and environmental monitoring. However, current oriented ...