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- 저자 : Zexuan Liu (검색결과 3 건)
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Animal Fur Recognition Algorithm Based on Feature Fusion Network
Peng Liu,Tao Lei,Qian Xiang,Zexuan Wang,Jiwei Wang 한국멀티미디어학회 2022 The journal of multimedia information system Vol.9 No.1
China is a big country in animal fur industry. The total production and consumption of fur are increasing year by year. However, the recognition of fur in the fur production process still mainly relies on the visual identification of skilled workers, and the stability and consistency of products cannot be guaranteed. In response to this problem, this paper proposes a feature fusion-based animal fur recognition network on the basis of typical convolutional neural network structure, relying on rapidly developing deep learning techniques. This network superimposes texture feature - the most prominent feature of fur image - into the channel dimension of input image. The output feature map of the first layer convolution is inverted to obtain the inverted feature map and concat it into the original output feature map, then Leaky ReLU is used for activation, which makes full use of the texture information of fur image and the inverted feature information. Experimental results show that the algorithm improves the recognition accuracy by 9.08% on Fur_Recognition dataset and 6.41% on CIFAR-10 dataset. The algorithm in this paper can change the current situation that fur recognition relies on manual visual method to classify, and can lay foundation for improving the efficiency of fur production technology.
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Cysteinyl Cathepsins: Multifunctional Enzymes in Cardiovascular Disease
Xiang Li,Zexuan Liu,Zeen Cheng,Xian Wu Cheng 전남대학교 의과학연구소 2012 전남의대학술지 Vol.48 No.2
Until recently, the role of lysosomal cysteine protease cathepsins in intracellular protein degradation was believed to be mainly restricted to scavenging. However, recent studies have revealed nontraditional roles for cysteine protease cathepsins in the extracellular space during the development and progression of cardiovascular disease. Although the precise mechanisms are unknown, data from animal studies suggest that members of the cathepsin family, like other extracellular proteases, contribute to extracellular matrix protein remodeling and interstitial matrix degradation, as well as to cell signaling and cell apoptosis in heart disease. Inflammatory cytokines and hormones regulate the expression and secretion of cathepsins in cultured cardiovascular cells and macrophages. Serum levels of cathepsins L, S, and K and their endogenous inhibitor cystatin C may be useful predictive biomarkers in patients with coronary artery disease and cardiac disease. Furthermore, in vivo pharmacological intervention with a synthetic cathepsin inhibitor and cardiovascular drugs (including statins and angiotensin II type 1 receptor antagonists) has the potential for pharmacologic targeting of cathepsins in cardiovascular disease. This review focuses on cathepsin biology (structure, synthesis, processing, activation, secretion, activity regulation, and function)and the involvement of cysteinyl cathepsins in the pathogenesis of several heart and vessel diseases, especially with respect to their potential application as diagnostic and prognostic markers and drug targets to prevent inappropriate proteolysis in cardiovascular disease.
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Chunjian Su,Jiazhen Liu,Zexuan Zhao,Shumei Lou,Rui Wang,Longyun Yang 대한기계학회 2020 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.34 No.12
In the present study, a five-boundary conditional distribution function of the forming angle is proposed. The stress, strain, and springback of a sheet in roll-forming process under three different angle distribution functions are studied. Furthermore, effects of forming angle increment, sheet thickness, and material yield strength on stress, strain distribution, and springback of sheet during roll forming are studied under optimized forming angle. The results demonstrate that stress, strain, and springback of each pass based on increment of forming angle under five-boundary condition during roll forming are less than those achieved by other forming angle distribution methods. The stress and strain in the bending zone increase with increase in the sheet thickness. After roll forming, the springback angle decreases with the increase of sheet thickness, increases with the increase of forming angle and material yield strength. However, springback angle can be effectively reduced by increasing the number of passes or correction rolls.
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