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Crack Fault Classification for Planetary Gearbox Based on Feature Selection Technique and K-means Clustering Method

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Chinese Journal of Mechanical Engineering 2018年第1期31卷 242-252页

作者： Li-Ming Wang yi-Min shao State Key Laboratory of Mechanical Transmission Chongqing University

During the condition monitoring of a planetary gearbox, features are extracted from raw data for a fault ***, different features have different sensitivity for identifying different fault types, and thus, the selection of a sensitive feature subset from an entire feature set and retaining as much of the class discriminatory information as possible has a directly effect on the accuracy of the classification results. In this paper, an improved hybrid feature selection technique(IHFST) that combines a distance evaluation technique(DET), Pearson’s correlation analysis, and an ad hoc technique is proposed. In IHFST, a temporary feature subset without irrelevant features is first selected according to the distance evaluation criterion of DET, and the Pearson’s correlation analysis and ad hoc technique are then employed to find and remove redundant features in the temporary feature subset, respectively, and hence,a sensitive feature subset without irrelevant or redundant features is selected from the entire feature set. Further, the k-means clustering method is applied to classify the different kinds of health conditions. The effectiveness of the proposed method was validated through several experiments carried out on a planetary gearbox with incipient cracks seeded in the tooth root of the sun gear, planet gear, and ring gear. The results show that the proposed method can successfully distinguish the different health conditions of a planetary gearbox, and achieves a better classification performance than other methods. This study proposes a sensitive feature subset selection method that achieves an obvious improvement in terms of the accuracy of the fault classification.

关键词： Planetary gearbox Gear crack Feature selection technique K-means classification

In memory of respected ***-Zhao Feng

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Journal of Palaeogeography 2023年第1期12卷 26-27页

作者： Long-yi shao China University of Mining and Technology(Beijing) BeijingChina

January 13,2023 Professor Feng left us in such a hurry,and his voice and smile will always remain in our *** I participated in ***'s carbonate petrology course in 1983,my communication with *** has not stopped,and I regard myself as Professor Feng's postgraduate student outside the program.I often participated in the seminars convened by ***,participated in the discussion of relevant issues,listened to his teachings,and benefited a lot.

关键词： carbonate outside stopped

Novel sutureless transplantation for primary pterygium associated with cysts

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International Journal of Ophthalmology(English edition) 2011年第3期4卷 280-283页

作者： yi shao, Jing-Lin yi Department of Ophthalmology the First Affiliated Hospital of Nanchang University Nanchang 330006 Jiangxi Province China Department of Science education the First Affiliated Hospital of Nanchang University Nanchang 330006 Jiangxi Province China Department of Endocrinology the Third Hospital of Nanchang the Affiliated Nanchang Hospital of Southern Medical University Nanchang 330009 Jiangxi Province China Laboratory of Neurobiology University of California·Irvine Irvine California 92697 USA

AIM: To evaluate the efficacy and safety of a novel sutureless AMT (amniotic membrane transplantation) or CAT (conjunctivolimbal autograft transplantation) using fibrin glue for reconstructing corneoconjunctival surfaces for primary pterygium associated with cysts. METHODS: A prospective descriptive study was made of the period 1 January 2006-1 May 2009. Nine patients with primary pterygium associated with cysts underwent pterygium and cyst excision followed by sutureless AMT or CAT using fibrin glue. RESULTS: During a mean follow-up of 8.00 +/- 0.67 months, all eyes maintained a smooth and stable corneal epithelial surface without recurrent erosion or persistent epithelial defect. The limbal donor site showed the presence of mild depressions without the formation of pseudopterygium. All eyes have good tear secretion function, tear film stability and ocular motility. CONCLUSION: Sutureless transplantation using fibrin glue is safe and effective for restoring a stable corneoconjunctival epithelium in primary pterygium associated with cysts.

关键词： sutureless pterygium cyst AMT CAT

Evaluation of novel decellularizing corneal stroma for cornea tissue engineering applications

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International Journal of Ophthalmology(English edition) 2012年第4期5卷 415-418页

作者： yi shao, Lu Yang Department of Ophthalmology the First Affiliated Hospital of Nanchang University Nanchang 330006 Jiangxi Province China Department of Endocrinology the Third Hospital of Nanchang the Affiliated Nanchang Hospital of Southern Medical University Nanchang 330009 Jiangxi Province China Department of Physiology Endocrinology Institute of Oklahoma University Oklahoma City OK 73104-5020 USA Department of Ophthalmology the First Affiliated Hospital of Nanhua University Hengyang 421001 Hunan Province China

AIM:To develop a new decellularization method depended upon the natural corneal structure and to harvest an ideal scaffold with good biocompatibilities for corneal ***:The acellular cornea matrix (ACM) were prepared from de-epithelium fresh porcine corneas (DFPCs) by incubation with 100% fresh human sera and additional electrophoresis at 4℃. Human corneal epithelial cells (HCEs) were used for the cytotoxicity tests of ACM. ACM were implanted into the Enhanced Green Fluorecence Protein (eGFP) transgenic mouse anterior chamber for evaluation of ***:HE and GSIB4 results showed fresh porcine cornea matrix with 100% human sera and electrophoresis could entirely decellularize stromal cell without reducing its transparency. ACM has no cytotoxic effect ex vivo. Animal test showed there was no rejection for one month after ***:These results provide a decellularizing approach for the study of corneal tissue engineering and had the broader implications for the field of biological tissue engineering in other engineered organ or tissue matrix.

关键词： cornea human sera electrophoresis tissue engineering decellularization biocompatibility

The expression and distribution of α-Gal gene in various species ocular surface tissue

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International Journal of Ophthalmology(English edition) 2012年第5期5卷 543-548页

作者： yi shao, Qiu-Ping Liu Department of Ophthalmology the First Affiliated Hospital of Nanchang University Nanchang 330006 Jiangxi Province China Department of Endocrinology the Third Hospital of Nanchang the Affiliated Nanchang Hospital of Southern Medical University Nanchang 330009 Jiangxi Province China Cullen Eye Institute of Baylor Universit Houston Texas 77030 USA

AIM: To examine the α-Gal gene expression and distribution in the different species/genus and developing phase animal ocular surface ***: α-Gal binding assay were carried out on various animal eye sections. Photograph, slit-lamp observation on various eye showed normal corneal ***: A strong α-Gal expression in invertebrates and some vertebrates ocular tissue, but no α-Gal binding in birds, fish and mammal. α-Gal expression change in the development of mice ocular surface tissue (except sclera) and display genus dependency in the different murine ocular surface ***: This study identified specific α-Gal epitopes binding area in the ocular surface of several species and may solve the problem that naive ocular surface may be used as natural α-Gal gene knockout model/high risk immunologic rejection model or ocular surface scaffold material.

关键词： α-Gal xenotransplantation animal ocular surface tissue engineering

Calculations of the Spin-Lattice Coupling Coefficients Fij and Zij for MgO:Co2+Crystal

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Communications in Theoretical Physics 2001年第10期36卷 487-490页

作者： ZHENG Wen-Chen WU shao-yi Department of Materials Science Sichuan University Chengdu 610064 China International Centre for Materials Physics The Chinese Academy of Sciences Shenyang 110015 China Department of Materials Science Sichuan University Chengdu 610064 China International Centre for Materials Physics The Chinese Academy of Sciences Shenyang 110015 China

According to a uniform and simple method of calculating spin-lattice coupling coefficients and the pert1rbation formulas of gi factors and hyperfine structure constants Ai based on the cluster approach for 3d7 ions in cubic,tetragonal and trigonal octahedral crystal fields, the spin-lattice coupling coefficients Fij (F11, Fl2, F44), Zij (Z11, Z12,Z44) and also g factor and hyperfine constant A for MgO:Co2+ are calculated by using the parameters obtained from the optical spectra without adjustable parameters. The calculated results show good agreement with the observed *** difiiculty in explaining the coeficients Fij and Zij is therefore removed.

关键词： spin-lattice coupling coefficients, electronic paramagnetic resonance, crystal- and ligand-field theory, Co2+, MgO crystal

Optimal Reinsurance and Investment Strategy with Delay in Heston’s SV Model

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Journal of the Operations Research Society of China 2021年第2期9卷 245-271页

作者： Chun-Xiang A Ai-Lin Gu yi shao School of Mathematics and Statistics Zhaoqing UniversityZhaoqing 526061GuangdongChina School of Applied Mathematics Guangdong University of TechnologyGuangzhou 510520China

In this paper,we consider an optimal investment and proportional reinsurance problem with delay,in which the insurer’s surplus process is described by a jump-diffusion *** insurer can buy proportional reinsurance to transfer part of the insurance claims *** addition to reinsurance,she also can invests her surplus in a financial market,which is consisted of a risk-free asset and a risky asset described by Heston’s stochastic volatility(SV)*** the performance-related capital flow,the insurer’s wealth process is modeled by a stochastic differential delay *** insurer’s target is to find the optimal investment and proportional reinsurance strategy to maximize the expected exponential utility of combined terminal *** explicitly derive the optimal strategy and the value ***,we provide some numerical examples to illustrate our results.

关键词： Proportional reinsurance Stochastic differential delay equation(SDDE) Heston’s stochastic volatility(SV)model Hamilton–Jacobi–Bellman(HJB)equation

New food sources and production systems:a comparison of international regulations and China’s advancements in novel foods with synthetic biology

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Food Science and Human Wellness 2024年第5期13卷 2519-2542页

作者： Xin Liu Di Wu yi shao Yongning Wu Key Laboratory for Deep Processing of Major Grain and Oil(The Chinese Ministry of Education) College of Food Science and EngineeringWuhan Polytechnic UniversityWuhan 430023China Institute for Global Food Security School of Biological SciencesBelfast B795DLUnited Kingdom NHC Key Laboratory of Food Safety Risk Assessment China National Center for Food Safety Risk AssessmentBeijing 100021China Department of Nutrition and Food Safety Peking Union Medical CollegeResearch Unit of Food SafetyChinese Academy of Medical SciencesBeijing 100021China

The global shift towards sustainable food systems has sparked innovations in food sources and production systems,including cell-based meat,plant-based food products,precision fermentation,and 3D food *** advancements pose regulatory challenges and opportunities,with China emerging as a critical player in adopting and regulating new food *** review explores the international landscape of new food sources and production systems(NFPS),focusing on China’s role and regulatory approaches compared to global *** this comparative analysis,we aim to contribute to the ongoing dialogue on food safety regulation,offering insights and recommendations for policymakers,industry stakeholders,and researchers engaged in the global food system’s *** comprehensive overview underscores the dynamic nature of regulatory frameworks governing NFPS,highlighting the international efforts to ensure food safety,consumer protection,and the sustainable evolution of the food industry.

关键词： New food sources Food production system Food safety International regulation Synthetic biology China

Results of meta-analysis should be treated critically

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World Journal of Gastroenterology 2020年第9期26卷 992-994页

作者： Rong-Qiang Liu yi shao Department of Ophthalmology The First Affiliated Hospital of Nanchang UniversityNanchang 330006Jiangxi ProvinceChina Department of Hepatobiliary Surgery The First Affiliated Hospital of Guangzhou Medical UniversityGuangzhou 510220Guangdong ProvinceChina

Proton pump inhibitors use increases hepatic encephalopathy risk in patients with liver disease.

关键词： Proton pump inhibitor Hepatic encephalopathy Liver disease