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Annals of Applied Mathematics 2024年第1期40卷 43-70页

作者： Yanming Lai kewei liang Ping Lin Xiliang Lu Qimeng Quan School of Mathematics and Statistics Wuhan UniversityWuhanHubei 430072China School of Mathematical Sciences Zhejiang UniversityHangzhouZhejiang 310058China Division of Mathematics University of DundeeDundee DD14HNUK School of Mathematics and Statistics and Hubei Key Laboratory of Computational Science Wuhan UniversityWuhan 430072China

In this paper we investigate the nonconforming P_(1) finite element ap-proximation to the sequential regularization method for unsteady Navier-Stokes *** provide error estimates for a full discretization ***-cally,conforming P_(1) finite element methods lead to error bounds that depend inversely on the penalty parameter ∈.We obtain an ∈-uniform error bound by utilizing the nonconforming P_(1) finite element method in this *** examples are given to verify theoretical results.

关键词： Navier-Stokes equations error estimates finite element method stabilization method

HOMOCENTRIC CONVERGENCE BALL OF THE SECANT METHOD

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Applied Mathematics(A Journal of Chinese Universities) 2007年第3期22卷 353-365页

作者： liang kewei Dept. of Math. Zhejiang Univ. Hangzhou 310027 China

A local convergence theorem and five semi-local convergence theorems of the secant method are listed in this paper. For every convergence theorem, a convergence ball is respectively introduced, where the hypothesis conditions of the corresponding theorem can be satisfied. Since all of these convergence balls have the same center x^＊, they can be viewed as a homocentric ball. Convergence theorems are sorted by the different sizes of various radii of this homocentric ball, and the sorted sequence represents the degree of weakness on the conditions of convergence theorems.

关键词： secant method semi-local convergence theorem local convergence theorem convergence ball,homocentric ball.

Heat Dissipation Performance of Metal Core Printed Circuit Board with Micro Heat Exchanger

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Journal of Harbin Institute of Technology(New Series) 2020年第1期27卷 91-96页

作者： Diancheng Qin kewei liang Guangdong LED Packaging⁃Used Heat Dissipation Substrate Engineering Technology Research Center Zhuhai 519180GuangdongChina Rayben Technologies(Zhuhai)Limited Zhuhai 519180GuangdongChina

A Metal Core Printed Circuit Board with Micro Heat Exchanger(MHE MCPCB)was introduced for thermal management of high power LED.A comparative study was performed between 4 W/(m·K)regular MCPCB and this novel MCPCB to investigate the heat dissipation performance of this novel *** was found that MHE MCPCB can obviously enhance the comprehensive optical properties of LED in comparison with 4 W/(m·K)regular ***,thermal contact resistance confining a dominant part of heat within the micro heat exchanger to achieve high efficient heat dissipation was proved.

关键词： MHE MCPCB heat dissipation performance LED optical property

Skin‑Inspired Ultra‑Tough Supramolecular Multifunctional Hydrogel Electronic Skin for Human–Machine Interaction

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Nano-Micro Letters 2023年第8期15卷 1-19页

作者： Kun Chen kewei liang He Liu Ruonan Liu Yiying Liu Sijia Zeng Ye Tian College of Medicine and Biological Information Engineering Northeastern UniversityShenyang 110169People’s Republic of China Foshan Graduate School of Innovation Northeastern UniversityFoshan 528300People’s Republic of China

Multifunctional supramolecular ultra-tough bionic e-skin with unique durability for human–machine interaction in complex scenarios still remains ***,we develop a skininspired ultra-tough e-skin with tunable mechanical properties by a physical cross-linking salting-freezing-thawing *** gelling agent(β-Glycerophosphate sodium:Gp)induces the aggregation and binding of PVA molecular chains and thereby toughens them(stress up to 5.79 MPa,toughness up to 13.96 MJ m^(−3)).Notably,due to molecular self-assembly,hydrogels can be fully recycled and reprocessed by direct heating(100°C for a few seconds),and the tensile strength can still be maintained at about 100%after six *** hydrogel integrates transparency(>60%),super toughness(up to 13.96 MJ m^(−3),bearing 1500 times of its own tensile weight),good antibacterial properties(*** and ***),UV protection(Filtration:80%–90%),high electrical conductivity(4.72 S m^(−1)),anti-swelling and *** hydrogel can not only monitor daily physiological activities,but also be used for complex activities underwater and message encryption/*** also used it to create a complete finger joint rehabilitation system with an interactive interface that dynamically presents the user’s health *** multifunctional electronic skin will have a profound impact on the future of new rehabilitation medical,human–machine interaction,VR/AR and the metaverse fields.

关键词： Ultra-tough hydrogel Supramolecular Flexible electronics Knuckle training Human-machine interaction

Giant reversible barocaloric effects with high thermal cycle stability in epoxybonded(MnCoGe)_(0.96)(CuCoSn)_(0.04) composite

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International Journal of Minerals,Metallurgy and Materials 2024年第11期31卷 2528-2534页

作者： Yafei Kuang Kun Tao Bo Yang Peng Tong Yan Zhang Zhigang Sun kewei Zhang Dunhui Wang Jifan Hu liang Zuo College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China Shanxi Key Laboratory of Magnetic and Electric Functional Materials and Applications Taiyuan University of Science and TechnologyTaiyuan 030024China Key Laboratory of Materials Physics Institute of Solid State PhysicsChinese Academy of SciencesHefei 230031China Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China School of Electronics and Information Hangzhou Dianzi UniversityHangzhou 310018China

Hexagonal MnMX-based(M=Co or Ni,X=Si or Ge)alloys exhibit giant reversible barocaloric ***,giant volume expansion would result in the as-cast MnMX ingots fragmenting into powders,and inevitably bring the deterioration of mechanical properties and *** fragmentation can bring degradation of structural transformation entropy change during cyclic application and removal of *** this paper,giant reversible barocaloric effects with high thermal cycle stability can be achieved in the epoxy bonded(MnCoGe)0.96(CuCoSn)0.04 *** reversible isothermal entropy change of 43.0 J·kg^(−1)·K^(−1) and adiabatic temperature change from barocaloric effects(ΔT_(BCE))of 15.6 K can be obtained within a wide temperature span of 30 K at 360 MPa,which is mainly attributed to the integration of the change in the transition temperature driven by pressure of−101 K·GPa^(−1) and suitable thermal hysteresis of 11.1 ***,the variation of reversibleΔ_(TBCE) against the applied hydrostatic pressure reaches up to 43 K·GPa^(−1),which is at the highest level among the other reported giant barocaloric *** importantly,after 60 thermal cycles,the composite does not break and the calorimetric curves coincide well,demonstrating good thermal cycle stability.

关键词： barocaloric effects cycle stability reversible isothermal entropy change reversible adiabatic temperature change MnCoGe alloys

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《四库全书总目》易学思想探析

江西师范大学学报（哲学社会科学版） 2019年第6期52卷 136-144页

作者：梁珂维张涛北京师范大学历史学院

《四库全书总目》为古代众多有代表性的易学著作撰写了提要,作了评价,内容非常丰富,俨然是一部古代易学发展简史。关于《周易》的性质和思维方式,《四库全书总目》提出了“寓教于卜筮”和“推天道以明人事”的观点,极为精确,影响深远。... 详细信息

《四库全书总目》为古代众多有代表性的易学著作撰写了提要,作了评价,内容非常丰富,俨然是一部古代易学发展简史。关于《周易》的性质和思维方式,《四库全书总目》提出了“寓教于卜筮”和“推天道以明人事”的观点,极为精确,影响深远。《四库全书总目》以较为折中的观点,分析了历代主要的易学流派,调和汉宋之争,酌平象数义理,提出了“两派六宗”说,大体反映了两千多年古代易学的发展轨迹,在易学史上具有重要地位。

关键词：四库全书总目易类序易学流派

Rhizoma Drynariae-derived nanovesicles reverse osteoporosis by potentiating osteogenic differentiation of human bone marrow mesenchymal stem cells via targeting ERα signaling

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Acta Pharmaceutica Sinica B 2024年第5期14卷 2210-2227页

作者： Qing Zhao Junjie Feng Fubin Liu Qianxin liang Manlin Xie Jiaming Dong Yanfang Zou Jiali Ye Guilong Liu Yue Cao Zhaodi Guo Hongzhi Qiao Lei Zheng kewei Zhao Guangzhou Key Laboratory of Chinese Medicine Research on Prevention and Treatment of Osteoporosis the Third Affiliated Hospital of Guangzhou University of Chinese MedicineGuangzhou 510378China Guangdong Engineering Research Center of Chinese Herbal-derived Vesicles Guangzhou University of Chinese MedicineGuangzhou 510006China Department of Laboratory Medicine Nanfang HospitalSouthern Medical UniversityGuangzhou 510515China Guangdong Engineering and Technology Research Center for Rapid Diagnostic Biosensors Nanfang HospitalSouthern Medical UniversityGuangzhou 510515China The Fifth Affiliated Hospital Sun Yat-sen University Zhuhai 519000China Department of Blood Transfusion Guangdong Heyou International HospitalFoshan 528306China School of Pharmacy Nanjing University of Chinese MedicineNanjing 210023China

Although various anti-osteoporosis drugs are available,the limitations of these therapies,including drug resistance and collateral responses,require the development of novel anti-osteoporosis *** Drynariae displays a promising anti-osteoporosis effect,while the effective component and mechanism remain ***,we revealed the therapeutic potential of Rhizoma Drynariae-derived nanovesicles(RDNVs)for postmenopausal osteoporosis and demonstrated that RDNVs potentiated osteogenic differentiation of human bone marrow mesenchymal stem cells(hBMSCs)by targeting estrogen receptor-alpha(ERα).RDNVs,a natural product isolated from fresh Rhizoma Drynariae root juice by differential ultracentrifugation,exhibited potent bone tissue-targeting activity and anti-osteoporosis efficacy in an ovariectomized mouse ***,effectively internalized by hBMSCs,enhanced proliferation and ERαexpression levels of hBMSC,and promoted osteogenic differentiation and bone ***,via the ERαsignaling pathway,RDNVs facilitated mRNA and protein expression of bone morphogenetic protein 2 and runt-related transcription factor 2 in hBMSCs,which are involved in regulating osteogenic *** analysis revealed that naringin,existing in RDNVs,was the active component targeting ERαin the osteogenic *** together,our study identified that naringin in RDNVs displays exciting bone tissue-targeting activity to reverse osteoporosis by promoting hBMSCs proliferation and osteogenic differentiation through estrogen-like effects.

关键词： Rhizoma Drynariae-derived nanovesicles Bone marrow mesenchymal stem cells Bone targeting Osteogenic differentiation ERαsignaling Naringin Bone morphogenetic protein 2 Runt-related transcription factor 2

热电分离式铜基板的制备及其在LED散热领域的应用

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半导体光电 2018年第4期39卷 544-548页

作者：秦典成梁可为陈爱兵乐健科技珠海有限公司广东省LED封装散热基板工程技术研究中心广东珠海519180

借鉴热电分离式设计理念,利用图形转移和蚀刻技术将铜合金板材加工成带有导热柱的底座,然后通过压合工艺将金属底座与FR4复合制备成热电分离式金属基板。利用冷热冲击试验箱对基板进行了热冲击试验,并借助SEM对历经1 000个高低温突变冷... 详细信息

借鉴热电分离式设计理念,利用图形转移和蚀刻技术将铜合金板材加工成带有导热柱的底座,然后通过压合工艺将金属底座与FR4复合制备成热电分离式金属基板。利用冷热冲击试验箱对基板进行了热冲击试验,并借助SEM对历经1 000个高低温突变冷热循环后的铜基材与FR4界面形貌进行了观察与研究。利用结温测试仪、功率计、积分球系统、半导体制冷温控台等仪器和设备,通过结温及热阻测试对比研究了普通铜基板与热电分离式铜基板在铜基、绝缘层及线路层厚度相同的情况下,对大功率LED模组散热效果的影响。结果表明,基板在经低温-55℃、高温125℃、1 000次冷热循环后,铜基材与FR4界面处既无裂纹萌生,也无气泡产生,FR4与铜基材结合完好。对于驱动功率为13W的LED灯珠,在模组辐射功率与热功率大致相同的情况下,热电分离式铜基板与普通铜基板所对应的芯片结温分别为49.72和73.14℃,所对应模组的热阻则分别为2.21和4.37℃/W,这意味着热电分离式铜基板较之普通铜基板在大功率LED散热管理方面更具优势。

关键词：热电分离 LED 散热结温热阻

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金属基板结构对LED散热性能的影响

中国材料进展 2019年第7期38卷 717-721页

作者：秦典成梁可为陈爱兵肖永龙乐健科技(珠海)有限公司广东省LED封装散热基板工程技术研究中心广东珠海519180

为满足天使眼汽车照明用LED灯的散热需求,设计了4种散热管理方案,同时利用结温测试仪与热电偶分别对上述4种方案的LED灯珠结温及金属基板(MCPCB)底部温度进行了测试,并对4种方案的散热效果展开了对比研究。结果表明,表面贴装技术(SMT)... 详细信息

为满足天使眼汽车照明用LED灯的散热需求,设计了4种散热管理方案,同时利用结温测试仪与热电偶分别对上述4种方案的LED灯珠结温及金属基板(MCPCB)底部温度进行了测试,并对4种方案的散热效果展开了对比研究。结果表明,表面贴装技术(SMT)焊接方案较铆接方案具备一定的散热优势,而热电分离式金属基板的焊接方案较普通金属基板的焊接方案散热优势明显,能大幅度降低LED结温,有望赋予天使眼LED灯更加优异的综合性能;当环境温度分别为(25±1)及(90±3)℃时,4种方案的散热效果为:0.4mm厚热电分离式金属基板的焊接方案>0.3mm厚普通金属基板的焊接方案>1.0mm厚普通金属基板的铆接方案>0.3mm厚普通金属基板的铆接方案;当环境温度为(25±1)℃时,4种散热方案下的LED结温均在最高允许温度135℃以内。而当环境温度为(90±3)℃时,只有使用热电分离式金属基板焊接方案的天使眼的LED结温低于最高允许温度,为117.92℃,其它3种方案的天使眼LED结温均超过最高允许温度。

关键词：天使眼 LED 散热金属基板热电分离结温

A Discussion on the Geochemical Characteristics of Stream Sediments and Ore - Prospecting Orientation in Weixing - Anquan Area of Heilongjiang Province

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Abstracts of Chinese Geological Literature 2018年第3期34卷 57-57页

作者： Yin Guoliang liang kewei Research Institute of Geological Survey of Heilongjiang Province Harbin 150036 China 不详

The Luming molybdenum deposit is located in Weixing-Anquan area of Heilongjiang Province, where stream sediments are well - developed. This paper introduces the popular statistical method which investigates the relationship between geochemical character - istics of stream sediments and mineralization. Some conclusions have been reached : 1) Mo is most likely to form large deposits;Au may form ore deposits, but the size will not be large;2) Mo and Sb, Cu, Pb, Zn. W belong to the same factor. and Mo has experienced multi-period mineralization;Au. Ag and As belong to the same factor;and 3) the authors chose 4 mineralization prospective areas to study stream sediment anomaly and found a new Mo orebody, which suggests that this area has good oresearch prospects of Mo deposits.

关键词： stream sediment surveys geochemistry ore guide of prospecting Heilongjiang River