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npj Computational Materials 2020年第1期6卷 955-955页

作者： Zekun Ren Felipe Oviedo Maung Thway Siyu I.P.Tian Yue Wang Hansong Xue Jose Dario Perea Mariya Layurova Thomas Heumueller Erik Birgersson Armin G.Aberle Christoph J.Brabec Rolf Stangl Qianxiao Li Shijing Sun Fen Lin Ian Marius Peters Tonio Buonassisi singapore-mit alliance for research and technology SMART Singapore Singapore Solar Energy research Institute of singapore (SERIS) National University of Singapore Singapore Singapore Massachusetts Institute of technology Cambridge USA Institute of Materials for Electronics and Energy technology (i-MEET) Friedrich-Alexander University Erlangen-Nürnberg Erlangen Germany Helmholtz Institute HI-ErN Forschungszentrum Jülich Erlangen Germany National University of singapore Singapore Singapore

In the original version of the published Article,there was ambiguity in Eq.(1).To improve clarity,Eq.(1)has been corrected to the following.

关键词： enable corrected ambiguity

微波辐射合成钌/碳纳米复合材料及其在电化学超级电容器的应用

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化学学报 2003年第12期61卷 2033-2035页

作者：陈卫祥韩贵 LEE Jim-Yang 刘昭林徐铸德浙江大学化学系杭州310027 Institute of Materials research and Engineering singapore mitalliance

以RuCl3 的乙二醇溶液作为前驱体 ,利用微波辐射技术合成了Ru/C (19 1wt % )纳米复合材料 .TEM观察表明这些纳米粒子具有均匀的尺寸 ,其平均粒径为 3 2nm ,并均匀地分散在纳米碳的表面 .Ru/C纳米复合材料在电化学氧化后可以作为电化学... 详细信息

以RuCl3 的乙二醇溶液作为前驱体 ,利用微波辐射技术合成了Ru/C (19 1wt % )纳米复合材料 .TEM观察表明这些纳米粒子具有均匀的尺寸 ,其平均粒径为 3 2nm ,并均匀地分散在纳米碳的表面 .Ru/C纳米复合材料在电化学氧化后可以作为电化学超级电容器的电极材料 ,循环伏安实验表明其比电容为 14 4F/g ,而未负载纳米钌的XC 72碳的比电容为 3 1F/g .

关键词：微波辐射合成钌/碳纳米复合材料电化学超级电容器

AN IMPROVED MODAL ANALYSIS FOR THREE-DIMENSIONAL PROBLEMS USING FACE-BASED SMOOTHED FINITE ELEMENT METHOD

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Acta Mechanica Solida Sinica 2013年第2期26卷 140-150页

作者： Zhicheng He Guangyao Li Zhihua Zhong Aiguo Cheng Guiyong Zhang Eric Li State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan University Intelligent Systems for Medicine Laboratory School of Mechanical and Chemical EngineeringThe University of Western Australia35 Stirling HighwayCrawley WA 6009Australia Department of Mechanical Engineering National University of Singapore9 Engineering Drive 1117576Singapore

In this work, we further extended the face-based smoothed finite element method （FS-FEM） for modal analysis of three-dimensional solids using four-node tetrahedron elements. The FS-FEM is formulated based on the smoothed Calerkin weak form which employs smoothed strains obtained using the gradient smoothing operation on face-based smoothing domains. This strain smoothing operation can provide softening effect to the system stiffness and make the FSFEM provide more accurate eigenfrequency prediction than the FEM does. Numerical studies have verified this attractive property of FS-FEM as well as its ability and effectiveness on providing reliable eigenfrequency and eigenmode prediction in practical engineering application.

关键词： numerical method meshfree method modal analysis face-based smoothed finiteelement method (FS-FEM)

Hydrogen FBG Sensor Using Pd/Ag Film With Application in Propulsion System Fuel Tank Model of Aerospace Vehicle

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Photonic Sensors 2014年第3期4卷 254-264页

作者： Said SAAD Lotfi HASSINE Vassim ELFAHEM Group of Electronics and Quantum Physics Laboratory of Advanced Materials and Quantum Phenomena Faculty ofSciences of Tunis 2092 Tunisia National Institute of Applied Sciences and technology University of Carthage North Urban Center of Tunis-B.P. 676Cedex Tunis 1080 Tunisia Regio iT Gesellschaft mit beschrankter Hafiung Aachen Germany

高效率氢纤维布拉格栅栏(FBG ) 传感器被介绍。敏感电影是钯银(Pd-Ag ) 的一个新联盟。另外，钛(Ti ) 层被用作粘合剂层。介绍传感器显示出超过 60 pm/1% H 的决定 2 , 和 4 s5 s 的一快反应时间在 0.1% H 被保证 2 4% H 2 范围。... 详细信息

高效率氢纤维布拉格栅栏(FBG ) 传感器被介绍。敏感电影是钯银(Pd-Ag ) 的一个新联盟。另外，钛(Ti ) 层被用作粘合剂层。介绍传感器显示出超过 60 pm/1% H 的决定 2 , 和 4 s5 s 的一快反应时间在 0.1% H 被保证 2 4% H 2 范围。而且，传感器的生活时间被调查。获得的结果证明传感器有一提高的生活时间。而且，传感器在太空车辆的推进系统燃料坦克模型被使用。获得的结果显示它由于氢漏是对灾难太空的一个预防系统。

关键词： FBG传感器模型应用氢气泄漏推进系统燃料箱空天飞行器 Ag膜光纤布拉格光栅

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半定优化与半光滑牛顿算法(英文)

运筹学学报 2004年第1期8卷 41-52页

作者：孙捷 School of Business National University of SingaporeRepublic of Singapore.

本文讨论半光滑牛顿算法的基本概念与其在求解半定优化问题中的应用.特别地,该算法可用于求解线性或非线性半定互补问题.本文同时综述最近在矩阵方程,增广拉格朗日公式和半定优化稳定性方面的、源于半光滑牛顿算法的理论成果.

关键词：半定优化半光滑牛顿算法变分不等式矩阵方程拉格朗日公式

Interpretable and Explainable Machine Learning for Materials Science and Chemistry

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Accounts of Materials research 2022年第6期3卷 597-607页

作者： Felipe Oviedo Juan Lavista Ferres Tonio Buonassisi Keith T.Butler Massachusetts Institute of technology CambridgeMassachusetts 02139United States Microsoft AI for Good research Lab RedmondWashington 98052United States SciML Scientific Computing DepartmentRutherford Appleton LaboratoryDidcot OX110DU.K. Department of Chemistry University of ReadingReading RG66ADU.K.

Machine learning has become a common and powerful tool in materials *** more data become available,with the use of high-performance computing and high-throughput experimentation,machine learning has proven potential to accelerate scientific research and technology *** the uptake of data-driven approaches for materials science is at an exciting,early stage,to realize the true potential of machine learning models for successful scientific discovery,they must have qualities beyond purely predictive *** predictions and inner workings of models should provide a certain degree of explainability by human experts,permitting the identification of potential model issues or limitations,building trust in model predictions,and unveiling unexpected correlations that may lead to scientific *** this work,we summarize applications of interpretability and explainability techniques for materials science and chemistry and discuss how these techniques can improve the outcome of scientific *** start by defining the fundamental concepts of interpretability and explainability in machine learning and making them less abstract by providing examples in the *** show how interpretability in scientific machine learning has additional constraints compared to general *** upon formal definitions in machine learning,we formulate the basic trade-offs among the explainability,completeness,and scientific validity of model explanations in scientific *** the context of these trade-offs,we discuss how interpretable models can be constructed,what insights they provide,and what drawbacks they *** present numerous examples of the application of interpretable machine learning in a variety of experimental and simulation studies,encompassing first-principles calculations,physicochemical characterization,materials development,and integration into complex *** discuss the varied impacts and uses of interpretabiltiy in these cases

关键词： explain purely insight

Mapping nanoscale topographic features in thick tissues with speckle diffraction tomography

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Light(Science & Applications) 2023年第9期12卷 1877-1885页

作者： Sungsam Kang Renjie Zhou Marten Brelen Heather K.Mak Yuechuan Lin Peter T.C.So Zahid Yaqoob Laser Biomedical research Center G.R.Harrison Spectroscopy LaboratoryMassachusetts Institute of TechnologyCambridgeMA 02139USA Department of Biomedical Engineering The Chinese University of Hong KongHong KongChina Department of Ophthalmology and Visual Sciences The Chinese University of Hong KongHong KongChina Department of Mechanical Engineering Massachusetts Institute of TechnologyCambridgeMA 02139USA Department of Biological Engineering Massachusetts Institute of TechnologyCambridgeMA 02139USA Department of Biomedical Engineering Boston UniversityBostonMA 02215USA

Resolving three-dimensional morphological features in thick specimens remains a significant challenge for label-free *** report a new speckle diffraction tomography(SDT)approach that can image thick biological specimens with~500 nm lateral resolution and~1μm axial resolution in a reflection *** SDT,multiple-scattering background is rejected through spatiotemporal gating provided by dynamic speckle-field interferometry,while depth-resolved refractive index maps are reconstructed by developing a comprehensive inverse-scattering model that also considers specimen-induced *** from the high-resolution and full-field quantitative imaging capabilities of SDT,we successfully imaged red blood cells and quantified their membrane fluctuations behind a turbid medium with a thickness of 2.8 scattering mean-free *** importantly,we performed volumetric imaging of cornea inside an ex vivo rat eye and quantified its optical properties,including the mapping of nanoscale topographic features of Dua’s and Descemet’s membranes that had not been previously visualized.

关键词： speckle inverse interferometry

Exon-centric regulation of pyruvate kinase M alternative splicing via mutually exclusive exons

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分子细胞生物学报:英文版 2012年第2期4卷 79-87页

作者： Zhenxun Wang Deblina Chatterjee Hyun Yong Jeon Martin Akerman Matthew G.Vander Heiden Lewis C.Cantley Adrian R.Krainer Cold Spring Harbor Laboratory PO Box 100Cold Spring HarborNY 11724USA Watson School of Biological Sciences Cold Spring HarborNY 11724USA Graduate Program in Molecular and Cellular Biology Stony Brook UniversityStony BrookNY 11794USA Koch Institute for Integrative Cancer research at mit CambridgeMA 02139USA Division of Signal Transduction Beth Israel Deaconess Medical Center and Department of Systems BiologyHarvard Medical SchoolBostonMA 02115USA

Alternative splicing of the pyruvate kinase M gene(PK-M)can generate the M2 isoform and promote aerobic glycolysis and tumor ***,the cancer-specific alternative splicing regulation of PK-M is not completely ***,we demonstrate that PK-M is regulated by reciprocal effects on the mutually exclusive exons 9 and 10,such that exon 9 is repressed and exon 10 is activated in cancer ***,exonic,rather than intronic,cis-elements are key determinants of PK-M splicing isoform *** a systematic sub-exonic duplication approach,we identify a potent exonic splicing enhancer in exon 10,which differs from its homologous counterpart in exon 9 by only two *** identify SRSF3 as one of the cognate factors,and show that this serine/arginine-rich protein activates exon 10 and mediates changes in glucose *** findings provide mechanistic insights into the complex regulation of alternative splicing of a key regulator of the Warburg effect,and also have implications for other genes with a similar pattern of alternative splicing.

关键词： alternative splicing cancer metabolism pyruvate kinase SRSF3

Wide-field three-photon excitation in biological samples

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Light(Science & Applications) 2016年第1期5卷 65-73页

作者： Christopher J Rowlands Demian Park Oliver T Bruns Kiryl D Piatkevich Dai Fukumura Rakesh K Jain Moungi G Bawendi Edward S Boyden Peter TC So Department of Biological Engineering Massachusetts Institute of TechnologyCambridgeMA 02139USA Media Lab Massachusetts Institute of TechnologyCambridgeMA 02139USA Department of Chemistry Massachusetts Institute of TechnologyCambridgeMA 02139USA Edwin L.Steele Laboratories Department of Radiation OncologyMassachusetts General Hospital and Harvard Medical SchoolBostonMA 02114USA Department of Brain and Cognitive Sciences McGovern Institute and MIT Center for Neurobiological EngineeringMassachusetts Institute of TechnologyCambridgeMA 02139-4307USA Department of Mechanical Engineering Massachusetts Institute of TechnologyCambridgeMA 02139USA

Three-photon wide-field depth-resolved excitation is used to overcome some of the limitations in conventional point-scanning two-and three-photon *** of chromophores as diverse as channelrhodopsins and quantum dots is shown,and a penetration depth of more than 700μm into fixed scattering brain tissue is achieved,approximately twice as deep as that achieved using two-photon wide-field *** with live animal experiments is confirmed by imaging the cerebral vasculature of an anesthetized mouse;a complete focal stack was obtained without any evidence of *** an additional validation of the utility of wide-field three-photon excitation,functional excitation is demonstrated by performing threephoton optogenetic stimulation of cultured mouse hippocampal neurons expressing a channelrhodopsin;action potentials could reliably be excited without causing photodamage.

关键词： biophotonics multiphoton microscopy optogenetics temporal focusing three-photon

Direct optical-structure correlation in atomically thin dichalcogenides and heterostructures

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Nano research 2020年第5期13卷 1363-1368页

作者： Akshay Singh Hae Yeon Lee Silvija Gradcak Department of Materials Science and Engineering Massachusetts Institute of Technology77 Massachusetts AveCambridgeMA 02141USA

Atomically thin transition metal dichalcogenides(TMDs)have distinct opto-electronic properties including enhanced luminescence and high on-off current ratios,which can be further modulated by making more complex TMD ***,resolution limits of conventional optical methods do not allow for direct nanoscale optical-structural correlation measurements in these materials,particularly of buried interfaces in TMD *** we use,for the first time,electron beam induced cathodoluminescence in a scanning transmission electron microscope(CL-STEM)to measure optical properties of monolayer TMDs(WS2,MoS2 and WSSe alloy)encapsulated between layers of *** observe dark areas resulting from localized(~100 nm)imperfect interfaces and monolayer folding,which shows that the intimate contact between layers in this application-relevant heterostructure is required for proper inter layer *** also realize a suitable imaging method that minimizes electron-beam induced changes and provides measurement of intrinsic *** overcome the limitation of small electron interaction volume in TMD monolayer(and hence low photon yield),we find that encapsulation of TMD monolayers with hBN and subsequent annealing is ***-STEM offers to be a powerful method to directly measure structure-optical correspondence in lateral or vertical heterostructures and alloys.

关键词： cathodoluminescence two-dimensional(2D)materials transition metal dichalcogenides interfaces heterostructures