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Buckling of a stiff thin film on a compliant substrate under anisotropic biaxial prestrain

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Science China(Physics,Mechanics & Astronomy) 2016年第2期59卷 57-66页

作者： Zhi Cheng Ou xiao Hu Yao xiao qing zhang Xue Jun Fan School of Civil Engineering and Transportation South China University of TechnologyGuangzhou 51064China Department of Mechanical Engineering Lamar UniversityBeaumont 77710USA

The structure of stretchable electronics is based on the buckling of a thin film on a compliant substrate. Under anisotropic biaxial prestrains, this structure may buckle into several patterns, including cylindrical, checkerboard, and undulating patterns. The displacement and energy of each pattern are deduced analytically. By comparing their minimum potential energies, the critical buckling condition of each pattern is determined. After secondary bifurcation, the checkerboard pattern occurs just above the critical prestrains, but the undulating pattern dominates other regions. The buckling amplitude and wavenumber of the undulating pattern are shown under biaxial prestrains. Even if the structure is under equi-biaxial prestrains, it may buckle into an asymmetric undulating pattern.

关键词： film substrate buckling biaxial anisotropic undulating

Machine Learning for Cataract Classification/Grading on Ophthalmic Imaging Modalities:A Survey

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Machine Intelligence Research 2022年第3期19卷 184-208页

作者： xiao-qing zhang Yan Hu Zun-Jie xiao Jian-Sheng Fang Risa Higashita Jiang Liu Research Institute of Trustworthy Autonomous Systems Southern University of Science and TechnologyShenzhen 518055China Department of Computer Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Tomey Corporation Nagoya 4510051Japan Cixi Institute of Biomedical Engineering Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315300China Guangdong Provincial Key Laboratory of Brain-inspired Intelligent Computation Southern University of Science and TechnologyShenzhen 518055China

Cataracts are the leading cause of visual impairment and blindness *** the years,researchers have achieved significant progress in developing state-of-the-art machine learning techniques for automatic cataract classification and grading,aiming to prevent cataracts early and improve clinicians′diagnosis *** survey provides a comprehensive survey of recent advances in machine learning techniques for cataract classification/grading based on ophthalmic *** summarize existing literature from two research directions:conventional machine learning methods and deep learning *** survey also provides insights into existing works of both merits and *** addition,we discuss several challenges of automatic cataract classification/grading based on machine learning techniques and present possible solutions to these challenges for future research.

关键词： Cataract classification and grading ophthalmic image machine learning deep learning

An end-to-end anastomosis model of guinea pig bile duct:A 6-mo observation

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World Journal of Gastroenterology 2011年第6期17卷 789-795页

作者： xiao-qing zhang Yuan-Hu Tian Zhi Xu Li-Xin Wang Chun-Sheng Hou xiao-Feng Ling xiao-Si Zhou Department of General Surgery Peking University Third Hospital Beijing 100191 China

AIM:To establish the end-to-end anastomosis (EEA) model of guinea pig bile duct and evaluate the healing process of bile ***:Thirty-two male guinea pigs were randomly divided into control group,2-,3-,and 6-mo groups after establishment of EEA ***,immunohistochemical and serologic tests as well as measurement of bile contents were *** bile duct diameter and the diameter ratio (DR) were measured to assess the formation of relative ***:Acute and chronic inflammatory reactions occurred throughout the healing process of bile *** test and bile content measurement showed no formation of persistent stricture in 6-mo *** DR revealed a transient formation of relative stricture in 2-mo group in comparation to control group (2.94 ± 0.17 vs 1.89 ± 0.27,P=0.004).However,this relative stricture was released in 6-mo group (2.14 ± 0.18,P=0.440).CONCLUSION:A simple and reliable EEA model of guinea pig bile duct can be established with a good reproducibility and a satisfactory survival rate.

关键词： Animal model Guinea pig Anastomosis Common bile duct Wound healing

An optimized grey wolf optimizer based on a mutation operator and eliminating-reconstructing mechanism and its apphcation

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Frontiers of Information Technology & Electronic Engineering 2017年第11期18卷 1705-1719页

作者： xiao-qing zhang Zheng-feng MING School of Mechano-Electronic Engineering Xidian University Xi'an 710071 China School of Physics and Electronic Engineering Xianyang Normal University Xianyang 712000 China

Due to its simplicity and ease of use, the standard grey wolf optimizer （GWO） is attracting much attention. However, due to its imperfect search structure and possible risk of being trapped in local optima, its application has been limited. To perfect the performance of the algorithm, an optimized GWO is proposed based on a mutation operator and eliminating-reconstructing mechanism （MR-GWO）. By analyzing GWO, it is found that it conducts search with only three leading wolves at the core, and balances the exploration and exploitation abilities by adjusting only the parameter a, which means the wolves lose some diversity to some extent. Therefore, a mutation operator is introduced to facilitate better searching wolves, and an eliminating- reconstructing mechanism is used for the poor search wolves, which not only effectively expands the stochastic search, but also accelerates its convergence, and these two operations complement each other well. To verify its validity, MR-GWO is applied to the global optimization experiment of 13 standard continuous functions and a radial basis function （RBF） network approximation experiment. Through a comparison with other algorithms, it is proven that MR-GWO has a strong advantage.

关键词： Swarm intelligence Grey wolf optimizer Optimization Radial basis function network

Europe ***:Pholcus(Araneae,Pholcidae)from Yanshan-Taihang Mountains confirms uneven distribution of spiders in Eurasia

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Zoological Research 2022年第4期43卷 532-534页

作者： Ying Lu Chang Chu xiao-qing zhang Shu-Qiang Li Zhi-Yuan Yao College of Life Science Shenyang Normal UniversityShenyangLiaoning 110034China Institute of Zoology Chinese Academy of SciencesBeijing 100101China Liaoning Key Laboratory of Evolution and Biodiversity ShenyangLiaoning 110034China Liaoning Key Laboratory for Biological Evolution and Agricultural Ecology ShenyangLiaoning 110034China

DEAR EDITOR,Morphological and molecular data were used to study 35 species of the Pholcus phungiformes species group from the Yanshan-Taihang Mountains in *** uneven distribution pattern of spiders in Eurasia is discussed,with a focus on Europe and *** covers approximately 10.18 million km2 in western Eurasia,while China covers about 9.6 million km2 in the *** to their relative positions to each other and similar land areas,spider species richness in Europe and China is comparable(Li,2020).

关键词： China distribution Mountains

Regression of East Tethys resulted in a center of biodiversity: A study of Mysmenidae spiders from the Gaoligong Mountains, China

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Zoological Research 2023年第4期44卷 737-738页

作者： Qiu-Qiu zhang Ya Li Yu-Cheng Lin Shu-Qiang Li Zhi-Yuan Yao xiao-qing zhang Key Laboratory of Bio-resources and Eco-environment(Ministry of Education) College of Life SciencesSichuan UniversityChengduSichuan 610064China Sichuan Key Laboratory for Conservation Biology of Endangered Wildlife Sichuan UniversityChengduSichuan 610064China Institute of Zoology Chinese Academy of SciencesBeijing 100101China College of Life Science Shenyang Normal UniversityShenyangLiaoning 110034China

DEAR EDITOR,This research involved the study of 31 species from the spider family Mysmenidae Petrunkevitch,1928,found in the Gaoligong Mountains of China,including one new genus and 13 new *** results suggested that regression of East Tethys contributed to the appearance of a center of *** Tethys,a classical and hot topic in *** has undergone a succession of significant geodynamic transformations,transitioning from an ancient ocean to the current Alpine-Himalayan orogenic ***,the East Tethys,serving as an invaluable lens through which to study continental geology and geodynamics,has played a pivotal role in triggering the major geological reconstructions of the entire Tethys(Pan et al.,1997).

关键词： Tethys East Mountains

Preparation of Cassava Starch-based Superabsorbent Polymer Using a Twin-roll Mixer as Reactor

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Chinese Journal of Polymer Science 2014年第10期32卷 1348-1356页

作者： Dong-ling Qiao Xian-yang Bao 刘宏生 Xing-xun Liu Ling Chen 余龙 xiao-qing zhang Pei Chen Centre for Polymer from Renewable Resource ERCPSP SCUT CSIRO Materials Science and Engineering Clayton Vic 3169 Australia School of Food Science South China Agriculture University

Cassava starch-based superabsorbent polymer was successfully synthesized using a new technology that based on modification of a Haake twin-roll mixer as reactor. The cassava starch was first gelatinized then modified by grafting under external shear stress in the reactor. The torque and temperature curves as a function of time can reflect the variations in the reactor and also offer some information about the copolymerization reaction. The advantages of this system include starch modification can be carried out （l） with high starch concentration, （2） under controlled ticne and （3） smaller amount of sample （60 g） required. The technology provides useful guides for reactive extrusion. The starch grafted composites were characterized by Fourier transform infrared spectroscopy （FTIR）, nuclear magnetic resonance （NMR） and thermal gravimetric analysis （TGA）. The TGA was also used for determining the percentage of grafting ratio. The results show that the cassava starch has been successfully grafted with acrylamide then crosslinked by N,N＇-methylene-bisacrylamide using this reactor. The ultimate water absorbent capacity of the cassava-based superabsorbent polymer impacted by various pH values illustrated that the acid and basic solutions inhibit the ability of imbibing water. Additionally, gel properties of the cassava-based superabsorbent polymer were investigated. It can be concluded that the structure of cassava gel is stable, while the three dimensional network of cassava-based superabsorbent polymer is rigid but its structure could not resist external force effectively and everlastingly since G＇ was decreased with increasing amplitude.

关键词： Graft Acrylamide Superabsorbent Extrusion Starch Cassava.

Inhibitory effect of Polo-like kinase 1 depletion on mitosis and apoptosis of gastric cancer cells

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World Journal of Gastroenterology 2006年第1期12卷 29-35页

作者： Xue-Hua Chen Bin Lan Ying Qu xiao-qing zhang Qu Cai Bing-Ya Liu Zheng-Gang Zhu Department of Surgery Shanghai Institute ofDigestive Surgery Ruijin Hospital Medical School of ShanghaiJiao Tong University Shanghai 200025 China Department of Surgical Oncology the First AffiliatedHospital Fujian Medical University Fuzhou 350005 FujianProvince China

AIM： Polo-like kinase 1 （PLK1） serine/threonine kinase plays a vital role in multiple phases of mitosis in gastric cancer cells. To investigate the effect of PLK1 depletion on mitosis and apoptosis of gastric cancer cells. METHODS： PLK1 expression was blocked by small RNA interference（siRNA）. The expression levels of PLK1, cdc2, cyclin B and caspase 3 were detected by Western blotting. Then, PLK1 depletion, cdc2 activity, cell proliferation, cell cycle phase distribution, mitotic spindle structure, and the rate of apoptosis of the PLK1 knockdown cells were observed. RESULTS： PLK1 gene knockdown was associated with increased cyclin B expression, increased cdc2 activity （but not with the expression levels）, accumulation of gastric cancer cells at G2/M, improper mitotic spindle formation, delayed chromosome separation and delayed or arrested cytokinesis. Moreover, PLK1 depletion in gastric cancer cells was associated with decreased proliferation, attenuated pro-caspase 3 levels and increased apoptosis. CONCLUSION： Blockage of to decreased mitosis or even PLK1 expression may lead apoptosis in gastric cancer cells, indicating that PLK1 may be a valuable therapeutic target for gastric cancer.

关键词： Gastric cancer cells PLK1 gene Mitosis Cell cycle Apoptosis

Study on treatment and nursing of elderly patients with gastric cancer complicated with diabetes

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Gastroenterology & Hepatology Research 2022年第2期4卷 40-42页

作者： xiao-qing zhang College of traditional Chinese medicine Shandong University of traditional Chinese medicineJinanShandongChina.

Objective To study and analyze the treatment and nursing of elderly patients with gastric cancer complicated with ***:different data were analyzed and ***:the elderly patients with gastric cancer and diabetes can cooperate with the control of blood glucose during the surgical treatment,and strengthen the nursing before and after the operation.

关键词： treatment and nursing of elderly patients with gastric cancer complicated with diabetes