Aircraft ducts play an indispensable role in various systems of aircraft. The regular inspection and maintenance aircraft are great significance for preventing potential failures ensuring the normal operation Traditional manual methods costly inefficient, especially under low-light conditions. To address these issues, we propose a new defect detection model called LESM-YOLO. In this study, integrate lighting enhancement module to improve accuracy recognition Additionally, reduce model's...

Defect detection in transparent materials typically relies on specific lighting conditions. However, through our work defect for aircraft glass canopies, we found that using a single condition often led to missed or false detections. This limitation arises from the optical properties of materials, where certain defects only become sufficiently visible under angles. To address this issue, developed dual-modal illumination system integrates both forward and backward capture images....

PDF HTML阅读 XML下载 导出引用 引用提醒 区间上非线性程序的终止性判定 DOI: 作者: 作者单位: 作者简介: 通讯作者: 中图分类号: 基金项目: Supported by the National Natural Science Foundation of China under Grant Nos.90718041, 10901116, 11001228 (国家自然科学基金); Basic Research Program No.2004CB318003 (国家重点基础研究发展计划(973)); Knowledge Innovation Chinese Academy Sciences No.KJCX2-YW-S02 (中国科学院知识创新工程); Open Project Shanghai Key Laboratory Trustworthy Computing No.07dz22304200801 (上海市高可信计算重点实验室开放课题) Termination Decision Nonlinear Programs over Intervals...

Sparse representation has been proven to be a very effective technique for various image restoration applications. In this paper, an improved sparse based method is proposed detect and estimate defocus blur of imaging sensors. Considering the fact that patterns usually vary remarkably across different images or patches in single image, it unstable time-consuming over over-complete dictionary. We propose adaptive domain selection scheme prelearn set compact dictionaries adaptively select...

This paper presents a novel audio classification algorithm, which combines the rule-based with model-based method in an efficient way. First, threshold-based is performed over each clip for preclassification, three typical features utilized and majority rule applied. Next, weighted frame-based Support Vector Machine (SVM) presented further classification, using new feature Mel-ICA as preclassification results weights. Finally, experimental have shown that algorithm achieved effective...

Network Centric Warfare (NCW) concept has been developed over ten years, but some misunderstanding is still in existence. The Command and Control, Battle Management, Communications (C2BMC) system of U.S. Ballistic Missile Defense System one the cases which employs NCW successfully. In this paper, successful reason was found by work information dissemination modeling then essence grasped deeply. Firstly, development status C2BMC introduced; Secondly, types characteristics BMDS flow were...

The detection of artillery inner-chamber flaw is an important task in development, production and maintenance. Owing to the special structure lathy space gun, processing images has many difficulties. In this paper, aiming at problem single image can not show a larger integrally, improved splice method based on log-polar coordinate mapping phase correlation was employed, seamless realized; Aiming flaws such as rifling rib cracks, rush concaves erosion pits influence security seriously,...

Aiming at the practical situations such as accurate optimal design, complex algorithms and precise technical demands of gun bore flaw image collecting, design frame a 3-D collecting processing system based on multi-baseline stereo imaging was presented in this paper. This mainly including computer, electrical control box, stepping motor CCD camera it can realize function collection, matching, information reconstruction after-treatments etc. Proved by theoretical analysis experiment results,...

The traditional collision detection of triangular patches is mostly attributed to the position relationship between line segments and points in patches. To judge three edges vertices patches, it necessary calculate spatial for many times. separation, intersection parallel should be discussed cases, which very complex. While judgment triangles on two-dimensional plane much simpler. In view this, this paper proposes a new method that transforms two into same patch. complexity triangle...