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UNDERSTANDING: 作品数：1531被引量：2459H指数：19; 导出分析报告; 相关领域：医药卫生更多>>; 相关作者：张伟伟孙永陈炯王彦蔡英凤更多>>; 相关机构：吉林大学南京大学东南大学中国科学院更多>>; 相关期刊：更多>>; 相关基金：国家自然科学基金国家重点基础研究发展计划中国博士后科学基金高等学校学科创新引智计划更多>>

Understanding low-threshold mode-locking at multi-GHz repetition rate: 《Light(Science & Applications)》2025年第1期13-14,共2页Wenbin He Meng Pang Philip St.J.Russell; Continuous-wave mode-locking at multi-GHz repetition rates is achieved in an ultrashort laser cavity at critical pulse energies 100 times lower than predicted by conventional theory.The authors reveal that dynamic gai...; 关键词：SWITCHED REPETITION LOCKING

Understanding the friction laws of Amontons and Coulomb by evaluating the real contact area: 《Friction》2025年第1期159-172,共14页Mitjan Kalin Petra Jan; Friction is a complex phenomenon that depends on many parameters.Despite this,we still rely on and describe friction in the vast majority of cases with a single value,namely,the coefficient of friction(µ),as first pr...; 关键词：real contact area FRICTION SLIDING Amontons COULOMB

Towards understanding the surface rippling process by periodic reciprocal nanoscratching: 《Friction》2023年第10期1815-1828,共14页Zihan LI Yongda YAN Jiqiang WANG Chen LI Yanquan GENG; The authors gratefully acknowledge the financial supports of the Natural Science Foundation of Heilongjiang Province of China(YQ2020E015);Science and Technology Based for Equipment Design and Manufacturing for Introduction Talents of Discipline to Universities 2.0 of the 111 Project(BP0719002);Self-planned Task of State Key Laboratory of Robotics and Systems,Harbin Institute of Technology(SKLRS202001C);Young Elite Scientist Sponsorship Program by China Association for Science and Technology(YESS20200155);the Fundamental Research Funds for the Central Universities(FRFCU5710050521 and FRFCU5710091220).; The bundle structure formed perpendicular to the scratching direction is a type of wear-induced structure for thermoplastics.In this study,the formation mechanism of bundle structures on polycarbonate(PC)surfaces is i...; 关键词：atomic force microscopy(AFM) bundle structures STICK-SLIP friction force

Understanding Pseudocapacitance Mechanisms by Synchrotron X-ray Analytical Techniques被引量：1: 《Energy & Environmental Materials》2023年第4期312-331,共20页Pei Tang Wuyang Tan Guangyang Deng Yunting Zhang Shan Xu Qijun Wang Guosheng Li Jian Zhu Qingyun Dou Xingbin Yan; financialy supported by National Key R&D Program of China(2022YFB2402600);the National Natural Science Foundation of China(22279166);the Research Start-up Funds from Sun Yat-Sen University(200306);the Fundamental Research Funds for the Central Universities,Sun Yat-Sen University(22qntd0101 and 22dfx01); Pseudocapacitive materials that store charges via reversible surface or near-surface faradaic reactions are capable of overcoming the capacity limitations of electrical double-layer capacitors.Revealing the structure...; 关键词：in situ experiments pseudocapacitive materials structure-property relationship synchrotron X-ray analytical techniques

A review of current understanding in tribochemical reactions involving lubricant additives被引量：7: 《Friction》2023年第4期489-512,共24页Yan CHEN Peter RENNER Hong LIANG; Lubricants have played important roles in friction and wear reduction and increasing efficiency of mechanical systems.To optimize tribological performance,chemical reactions between a lubricant and a substrate must be...; 关键词：lubricant additives tribochemical reactions oil-soluble organics ionic liquids(ILs) nanoparticles(NPs)

Understanding wide field-of-view flat lenses:an analytical solution[Invited]: 《Chinese Optics Letters》2023年第2期111-118,共8页杨帆安森松 Mikhail Y.Shalaginov 张华亮胡崛隽古田; supported by the Defense Advanced Research Projects Agency Defense Sciences Office(DSO)Program,EXTREME Optics and Imaging(EXTREME)(No.HR00111720029);MIT Skoltech Seed Fund Program,and MIT Deshpande Center for Technological Innovation。; Wide field-of-view(FOV)optics are widely used in various imaging,display,and sensing applications.Conventional wide FOV optics rely on complicated lens assembly comprising multiple elements to suppress coma and other ...; 关键词：metasurface metalens FIELD-OF-VIEW

Understanding pedestrian behavior and spatial relations:A pedestrianized area in Besiktas,Istanbul被引量：3: 《Frontiers of Architectural Research》2023年第1期67-84,共18页Ozge Ceylin Yıldırım Elif C¸elik; This research provides a mixed method of investigating and analyzing pedestrian behavior in pedestrianized areas,which is one of the human-based urban development practices.The relationship between pedestrian behavior...; 关键词：Pedestrian behavior Pedestrianization Besiktas Gordon Cullen’s theory Space syntax

Understanding the lineshape of surface-enhanced infrared absorption spectra: 《National Science Review》2021年第4期34-35,共2页Shunping Zhang Hongxing Xu; Infrared absorption spectroscopy offers fingerprint identification of molecular analytes through their vibrational or rotational degrees of freedom.However,the absorption cross-section of a single molecule is very sma...; 关键词：ABSORPTION VIBRATIONAL typically

Understanding the source of signal fluctuations in laser-induced breakdown spectroscopy analytical applications: 《Frontiers of physics》2021年第2期33-34,共2页Vincenzo Palleschi; A recent paper[1]by the group of Prof.Zhe Wang,Beijing,China reveals the physical mechanism responsible of the signal fuctuations in laser-induced breakdown spectroscopy analysis.Exactly 20 years ago,today, I official...; 关键词：BREAKDOWN SIGNAL LASER

Understanding X-ray absorption spectra by means of descriptors and machine learning algorithms被引量：1: 《npj Computational Materials》2021年第1期1877-1889,共13页A.A.Guda S.A.Guda A.Martini A.N.Kravtsova A.Algasov A.Bugaev S.P.Kubrin L.V.Guda P.Šot J.A.van Bokhoven C.Copéret A.V.Soldatov; A.Guda acknowledges the financial support from the Russian Foundation for Basic Research(project number 20-32-70227)for the work on the multicomponent mixtures.A.Bugaev and A.V.Soldatov acknowledge the Russian Science Foundation grant#20-43-01015 for the financial support for the work on the spectral descriptors.Authors acknowledge D.D.Badyukov from Vernadsky Institute of Geochemistry and Analytical Chemistry of Russian Academy of Sciences for providing samples for analysis.P.Šot acknowledges the Shell Global Solutions International,B.V.for funding the work on the synthesis of Fe-containing catalyst,and European Synchrotron Research Facility for awarded beamtimes at beamlines ID26,BM25,and Swiss Light Source for the beamtime at SuperXAS beamline.; X-ray absorption near-edge structure(XANES)spectra are the fingerprint of the local atomic and electronic structures around the absorbing atom.However,the quantitative analysis of these spectra is not straightforward....; 关键词：SPECTRA SPECTRA ABSORPTION

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