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Fabricating polymer/HEA-hybrid topological lattice structure for enhanced mechanical properties

Progress in Natural Science:Materials International 2022年第6期32卷 800-805页

作者： Wentao Zhang Zhongzheng Yao sihan Zhang sinan Liu Huiqiang ying Jiacheng Ge Shu Fu Yu Lou xiang Li Zhenduo Wu He Zhu Shuangqin Chen si Lan Herbert Gleiter Institute of Nanoscience School of Materials Science and Engineering Nanjing University of Science and Technology School of Sciences Nanjing University of Science and Technology Center for Neutron Scattering and Physics Department City University of Hong Kong Dongguan Research Institute Shenzhen Research Institute City University of Hong Kong

Metamaterials such as architected lattice structures have aroused broad interest in being applied as mechanical supports for their lightweight and custom-shaped *** various prior efforts have been devoted,a multiscale fabrication of micro-nano lattice structures without penalizing the mechanical properties is still a challenging but highly desirable *** we put forward a strategy to produce a mechanically enhanced micro-nano lattice structure by conformally depositing a CoCrFeNiTi high-entropy alloy(HEA) coating layer onto a three-dimensional(3D) printed polymer *** template for the 3D printing employs a six-membered tricapped trigonal prism(6M-TTP) structure derived from a medium-range order structure motif in amorphous *** topological complexity of the 6M-TTP can substantially avoid the stress concentration by offering stress-release channels,while the HEA film incorporating with amorphous and nanocrystalline constituents can further reinforce the lattice architecture through its size hardening *** from the above,the fabricated polymer/HEA-hybrid lattice exhibits a high specific compressive strength(～0.055 MPa kg-1m3at a density below 500 kg m-3),a superior elastic recoverability(～70% recovery rate under>30% compression),an enhanced plasticity(40% strain) and a high specific modulus(0.135 MPa kg-1m3).Our strategy initiates a perspective way to fabricate multiscale micro-nano lattice structures with improved mechanical properties,which could be extended to widespread metamaterial research.

关键词： Nanocrystals

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Adaptive Harmonic Virtual Impedance Control for Improving Voltage Quality of Microgrids

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Journal of Modern Power Systems and Clean Energy 2024年第5期12卷 1548-1558页

作者： Yang Wang xiang Zhou Junmiao Tang Xianyong Xiao Shu Zhang Jiandong si the College of Electrical Engineering Sichuan UniversityChengdu610065China the Taizhou Power Supply Company State Grid Zhejiang Elec tric Power Co.Ltd.Taizhou 318000China

The effects of nonlinear loads on voltage quality represent an emerging concern for islanded *** research works have mainly focused on harmonic power sharing among multiple inverters,which ignores the diversity of different inverters to mitigate harmonics from nonlinear *** a result,the voltage quality of microgrids cannot be effectively *** address this issue,this study proposes an adaptive harmonic virtual impedance(HVI)control for improving voltage quality of *** on the premise that no inverter is overloaded,the main objective of the proposed control is to maximize harmonic power absorption by shaping the lowest output impedances of *** achieve this,the proposed control is utilized to adjust the HVI of each inverter based on its operation *** addition,the evaluation based on Monte Carlo harmonic power flow is designed to assess the performance of the proposed control in ***,comparative studies and control-in-the-loop experiments are conducted.

关键词： Microgrid nonlinear load residual capacity harmonic power inverter adaptive harmonic virtual impedance control

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Insights into stem cell therapy for diabetic retinopathy: a bibliometric and visual analysis

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Neural Regeneration Research 2021年第1期16卷 172-178页

作者： xiang-Jun Li Chun-Yan Li Dan Bai ying Leng Department of Ophthalmology Affiliated Hospital of Beihua UniversityJilinJilin ProvinceChina Department of Endocrinology Affiliated Hospital of Beihua UniversityJilinJilin ProvinceChina

Stem cells have been confirmed to be involved in the occurrence and development of diabetic retinopathy;however,the underlying mechanisms remain *** this study,we used Citespace software to visually analyze 552 articles exploring the stem cell-based treatment of diabetic retinopathy over the past 20 years,which were included in the Web of Science Core *** found the following:(1)a co-citation analysis of the references cited by all 552 articles indicated 15 *** cluster#0,representing the stem cell field,some highly cited landmark studies emerged between 2009–*** example,endothelial progenitor cells and diabetic retinopathy gradually received the full attention of scholars,in terms of their relationship and therapeutic *** researchers also verified the potential of adipose-derived stem cells to differentiate into stable retinal perivascular cells,using a variety of animal models of retinal vascular *** of these achievements provided references for the subsequent stem cell research.(2)An analysis of popular keywords among the 552 articles revealed that,during the past 20 years,a relative increase in basic research articles examining stem cells and endothelial progenitor cells for the treatment of diabetic retinopathy was *** contents of these articles primarily involved the expression of vascular endothelial growth factor,vascular regeneration,oxidative stress,and inflammatory response.(3)A burst analysis of keywords used in the 552 articles indicated that genetic and cytological research regarding the promotion of angiogenesis was an issue of concern from 2001 to 2012,including several studies addressing the expression of various growth factor genes;from 2014 to 2020,mouse models of diabetic retinopathy were recognized as mature animal models,and the most recent research has focused on macular degeneration,macular edema,neurodegeneration,and inflammatory changes in diabetic animal models.(4)Globally,the current

关键词： diabetes diabetic retinopathy epithelial cells macula progenitor cells retina stem cells visual analysis

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Reliability analysis for wireless communication networks via dynamic Bayesian network

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Journal of Systems Engineering and Electronics 2023年第5期34卷 1368-1374页

作者： YANG Shunqi ZENG ying LI xiang LI Yanfeng HUANG Hongzhong School of Naval Architecture and Ocean Engineering Huazhong University of Science and TechnologyWuhan 430074China School of Mechanical and Electrical Engineering University of Electronic Science and Technology of ChinaChengdu 611731China China University of Petroleum at Karamay Karamay 834000China

The dynamic wireless communication network is a complex network that needs to consider various influence factors including communication devices,radio propagation,network topology,and dynamic *** works focus on suggesting simplified reliability analysis methods for these dynamic *** one of the most popular modeling methodologies,the dynamic Bayesian network(DBN)is ***,it is insufficient for the wireless communication network which contains temporal and non-temporal *** this end,we present a modeling methodology for a generalized continuous time Bayesian network(CTBN)with a 2-state conditional probability table(CPT).Moreover,a comprehensive reliability analysis method for communication devices and radio propagation is *** proposed methodology is verified by a reliability analysis of a real wireless communication network.

关键词： dynamic Bayesian network(DBN) wireless commu-nication network continuous time Bayesian network(CTBN) network reliability

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课程目标达成度评价的价值导向:从举证到赋能

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黑龙江高教研究 2025年第2期43卷 109-114页

作者：蒋成香上海师范大学上海200234

课程目标达成度评价是产出导向的师范人才培养内部评价体系的起点和重要内容,其贯穿师范类专业认证和人才培养全周期,需要从认证体系和人才培养两个视角探究其实质。将外部师范类专业认证要求内化为师范人才内部培养要求,将有助于实现... 详细信息

课程目标达成度评价是产出导向的师范人才培养内部评价体系的起点和重要内容,其贯穿师范类专业认证和人才培养全周期,需要从认证体系和人才培养两个视角探究其实质。将外部师范类专业认证要求内化为师范人才内部培养要求,将有助于实现从举证导向到赋能导向评价的价值转变。在赋能评价建构路径上,建立以师范生教师职业能力标准为核心的培养体系是赋能评价的基础,以师范生教师职业能力培养为导向设计课程教学评价任务、教师将评价融入教学研究从而提高自身专业水平、师范生将参与评价融入学习是实施赋能评价的切入点,以适切的评价取向实施赋能评价是其评价模式。

关键词：师范类专业认证课程目标达成度评价价值导向举证赋能

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国家级一流本科专业建设点的布局及特征分析

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黑龙江高教研究 2025年第2期43卷 8-16页

作者：陈祥祺厦门大学福建厦门361005

国家级一流本科专业的建设工作体现一流本科、一流专业和一流人才的建设旨向,其布局更深谙着我国一流本科教育的长远规划,故尝试对收集到的11 502个国家级一流本科专业建设点进行基本情况的统计分析和空间布局的聚类分析,借此明晰国家... 详细信息

国家级一流本科专业的建设工作体现一流本科、一流专业和一流人才的建设旨向,其布局更深谙着我国一流本科教育的长远规划,故尝试对收集到的11 502个国家级一流本科专业建设点进行基本情况的统计分析和空间布局的聚类分析,借此明晰国家级一流本科专业建设点在全国范围内的地域分布及配置情况。结果显示:国家级一流本科专业建设点的布局存续着“三不均”和“三具有”之特征,即国家级一流本科专业建设点的地域分布不均、校际分布不均和学科分布不均,具有重点的区域集聚、具有鲜明的战略导向和具有动态的调整机制。有鉴于此,有针对性地提出具体的实践策略,以期为国家级一流本科专业建设点全面落实“双万计划”的目标要求提供指引。

关键词：一流本科教育国家级一流本科专业建设点布局特征

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Validity and Reliability of Chinese Physical Activity Questionnaire for Children Aged 10-17 Years

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Biomedical and Environmental Sciences 2019年第9期32卷 647-658页

作者： YANG Xi JAGO Russell ZHAI Yi YANG Zhen Yu WANG Yu ying si xiang WANG Jun GAO Jian Fen CHEN Jing Ron YU ying Jie ZHAO Wen Hua National Institute for Nutrition and Health Chinese Center for Disease Control and PreventionBeijing 100050China Chinese Center for Disease Control and Prevention Beijing 102206China Center for Exercise Nutrition and Health SciencesSchool for Policy StudiesUniversity of BristolBristol BS8 1TZUK Beijing Tiantan Hospital Capital Medical UniversityBeijing 100050China Wanzhou District Center for Disease Control and Prevention Chongqing 404000China Yanqing District Center for Disease Control and Prevention Beijing 102100China Chongqing Center for Disease Control and Prevention Chongqing 400042China Beijing Center for Disease Prevention and Control Beijing 100013China

Objective This study is aimed to report the development,the reliability and validity of the Chinese Children Physical Activity Questionnaire(CCPAQ)which was designed for the assessment of physical activity pattern in young population in *** The CCPAQ was administered for two times in 119 children(mean age 13.1±2.4 years;boys 47%)to examine reliability by using intraclass correlation *** was determined in 106 participants by agreement with the CCPAQ measures and the objective method,the ActiGraph *** on physical activity patter n including time spe nt on d iff ere nt intensi ties and total physical activity,sedentary behavior as well as physical activity energy expenditure were used to assess the validity with Spearman's correlation coefficient and the Bland-Altman *** The reliability coefficient of the CCPAQ ranged from 0.63-0.93(Intra-class correlation coefficient).Spearman's correlation coefficient for validity of time spent on total physical activity and sedentary behavior were all 0.32(Psical activity energy expenditure was 0.58(Psical activity and light physical activity showed a relatively low correlation with the accelerometer(rho=0.20,P=0.040;rho=0.19,P=0.054).Conclusion The CCPAQ appears to be a promising and feasible method to assess physical activity pattern in Chinese children.

关键词： Physical activity Sedentary behavior Child Questionnaire Validity and reliability

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Facile preparation of Nb_(2)O_(5) microspheres and their excellent electrochemical performance in aqueous zinc-ion hybrid supercapacitors

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Rare Metals 2022年第9期41卷 3129-3141页

作者： si-Jia Zhang Han Chen Yi-Xue Xu Chang-Sheng An Kai-Xiong xiang School of Materials and Advanced Manufacturing Liling Ceramic InstituteHunan University of TechnologyZhuzhou412007China Hunan Institute of Science and Technology Yueyang414000China Hunan Key Laboratory of Applied Environmental Photocatalysis Changsha UniversityChangsha410022China

The aqueous solution-based zinc-ion hybrid supercapacitors(ZHSCs)have attracted immense attention as they are characterized by high power and energy *** materials with high performance should be developed for ZHSCs to resolve power imbalances between capacitor-and battery-type electrode *** address this issue,Nb_(2)O_(5) microspheres(with the structure like sweet dumplings with exposed stuffing)were produced following a hydrothermal process which was followed by a high-temperature calcination *** specific capacity of the as-synthesized Nb_(2)O_(5) microspheres was up to 324 F·g^(-1) when the current density was 0.1 A·g^(-1),and the long-term capacity retention was 85%at the end of 5000 *** results revealed that the nanospheres could be used as battery-type electrode materials for the fabrication of ***_(2)O_(5)//AC ZHSCs were fabricated with Nb_(2)O_(5) microspheres as the negative electrode materials,and activated carbon(AC)was used as the positive electrode *** a result,a specific capacity of 108 F·g^(-1) was achieved when the current density was 0.1 A·g^(-1).The power density was high(8020 W·kg^(-1))at 28 Wh·kg^(-1),and the energy density was high(60 Wh·kg^(-1))at 100 W·kg^(-1).The structurally novel Nb_(2)O_(5) microspheres can be potentially used for the development of the next-generation ZHSCs that exhibit excellent performance.

关键词： Hydrothermal Microspheres Nb_(2)O_(5) Zincion hybrid supercapacitors(ZHSCs) Fast kinetics

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Androgen and meibomian gland dysfunction:from basic molecular biology to clinical applications

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International Journal of Ophthalmology(English edition) 2021年第6期14卷 915-922页

作者： Li-xiang Wang ying-Ping Deng Department of Ophthalmology West China Hospital of Sichuan UniversityChengdu 610041Sichuan ProvinceChina

Meibomian gland,the largest sebaceous gland of the body,is responsible for the biosynthesis of lipid layer of the tear film to prevent excessive *** loss of normal functions of meibomian gland,known as meibomian gland dysfunction(MGD),is a chronic disease and is the leading cause of dry eye symptoms in the *** have found sex hormones,especially androgen,play vital roles in the regulation of the functions of meibomian ***,androgen has also been preliminarily applied in clinics for the treatment of MGD and showed promising results,especially in people with endogenous androgen *** review summarized the mechanisms of the function of androgen on meibomian gland based on molecular,animal,and clinical studies,and proposed evidence-based views about its potential applications for the treatment of MGD.

关键词： meibomian gland dysfunction androgen dry eye disease

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Comparison of isolated-check visual evoked potential and standard automated perimetry in early glaucoma and high-risk ocular hypertension

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International Journal of Ophthalmology(English edition) 2017年第4期10卷 599-604页

作者： xiang-Wu Chen ying-Xi Zhao Department of Outpatient Service the Eye Hospital of Wenzhou Medical University

AIM：To compare the diagnostic performance of isolatedcheck visual evoked potential（ic VEP） and standard automated perimetry（SAP）,for evaluating the application values of ic VEP in the detection of early ***：Totally 144 subjects（288 eyes） were enrolled in this *** VEP testing was performed with the Neucodia visual electrophysiological diagnostic system.A 15% positive-contrast（bright） condition pattern was used in this device to differentiate between glaucoma patients and healthy control ***-to-noise ratios（SNR） were derived based on a multivariate *** eyes were judged as abnormal if the test yielded an SNR≤*** testing was performed with the Humphrey Field Analyzer *** visual fields were deemed as abnormality if the glaucoma hemifield test results outside normal limits;or the pattern standard deviation with P〈0.05;or the cluster of three or more non-edge points on the pattern deviation plot in a single hemifield with P〈0.05,one of which must have a P〈*** photographs were graded as either glaucomatous optic neuropathy or normal by two experts who were masked to all other patient *** regression analysis（MRA） used as a separate diagnostic classification was performed by Heidelberg retina tomograph（HRT）.RESULTS：When the disc photograph grader was used as diagnostic standard,the sensitivity for SAP and ic VEP was 32.3% and 38.5% respectively and specificity was 82.3% and 77.8% *** the MRA Classifier was used as the diagnostic standard,the sensitivity for SAP and ic VEP was 48.6% and 51.4% respectively and specificity was 84.1% and 78.0% *** the combined structural assessment was used as the diagnostic standard,the sensitivity for SAP and ic VEP was 59.2%and 53.1% respectively and specificity was 84.2% and 84.6% *** was no statistical significance between the sensitivity or specificity of SAP and ic VEP,regardless of which diagnostic standard was based ***

关键词： isolated-check visual evoked potential standard automated perimetry signal-to-noise ratios early glaucoma

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