Infrared dim tiny-sized target detection based on feature fusion.

Detection of infrared objects is essential for applications ranging from remote sensing to thermal imaging. In certain instances, such as when the infrared target is situated at a considerable distance from the detector, the detected object exhibits diminutive dimensions with a concurrently low signal intensity, leading to a challenge in achieving precision in object detection. In this paper, we propose a dual-layer omnidirectional target enhancement (DODTE) module to address the issue of low contrast, which causes the target to be submerged in the background and lose its position information.

[Expression of MMP-9 and TIMP-1 in nasopharyngeal carcinoma and its signification at Xi'an and Shenzhen].

Objective: To compare the expression of matrix metalloproteinase-9 and tissue inhibitor of matrix metalloproteinase-1 of nasopharyngeal carcinoma at Xi'an and Shenzhen area.

Method: The protein expression of MMP 9 and TIMP 1 were studied by immunohistochemistry staining in 21 cases nasopharyngeal carcinoma of Xi'an and 22 cases of Shenzhen.

Result: The expression positive rates of MMP-9 in nasopharyngeal carcinoma tissues at Xi'an and Shenzhen were 61.