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19th International Conference on Composite materials, ICCM 2013

作者： Liu, Y. Schwartz, A.G. Birman, V. Thomopoulos, S. Genin, G.M. Dept. Mechanical Engineering and Materials Science Washington University St. Louis United States Dept. Orthopaedic Surgery Washington University St. Louis United States Engineering Educ. Center Missouri University of Science and Technology St. Louis United States

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Increasing volume fraction of precipitates and strength of a Mg-Zn-Y alloy by pre-ageing deformation

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Magnesium Technology 2013 - TMS 2013 Annual Meeting and Exhibition

作者： Rosalie, Julian M. Somekawa, Hidetoshi Singh, Alok Mukai, Toshiji Structural Materials Unit National Institute for Materials Science Tsukuba 305-0047 Japan Dept. Mechanical Engineering Kobe University 1-1 Rokkodai Nada Kobe city 657-8501 Japan

ISBN: (纸本)9781118605523

Pre-ageing deformation was applied to a Mg-Zn-Y alloy to refine the size of β1′ precipitates. Reductions in the precipitate length and diameter were accompanied by a substantial increase in the volume fraction of the β1′ precipitates from 0.5% (no pre-strain) to 2.3% (5% pre-strain). This contrasted with Mg-Zn alloys, in which the precipitate volume fraction in the peak aged condition was not affected by pre-ageing strain. The increase in precipitate volume fraction contributed significantly to an increase in the yield strength from 217MPa (no pre-strain) to 286MPa (5% pre-strain). Precipitate strengthening via Orowan looping was the most significant contributor to the overall strength of the alloy.

关键词： Precipitates

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New experimental method to measure metallic surface area of coronary stents 30

New experimental method to measure metallic surface area of ...

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30th Danubia-Adria Symposium on Advances in Experimental Mechanics, DAS 2013

作者： Károly, Dóra Kovács, Miksa Bognár, Eszter Dept. of Materials Science and Engineering Faculty of Mechanical Engineering Budapest University of Technology and Economics Bertalan L. u. 7 Budapest1111 Hungary MTA-BME Research Group for Composite Science and Technology Muegyetem rkp. 3 Budapest1111 Hungary

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Modelling and simulation of coronary stents 30

Modelling and simulation of coronary stents

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30th Danubia-Adria Symposium on Advances in Experimental Mechanics, DAS 2013

作者： Kovács, Miksa Károly, Dóra Bognár, Eszter Dept. of Materials Science and Engineering Faculty of Mechanical Engineering Budapest University of Technology and Economics Bertalan L. u. 7 Budapest1111 Hungary MTA-BME Research Group for Composite Science and Technology Muegyetem rkp. 3 Budapest1111 Hungary

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Distributed stochastic multicommodity flow optimization

Distributed stochastic multicommodity flow optimization

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IEEE Global Conference on Signal and Information Processing (GlobalSIP)

作者： Nikolaos Chatzipanagiotis Michael M. Zavlanos Dept. of Mechanical Engineering and Materials Science Duke University Durham NC USA

ISBN: (纸本)9781479902460

In this paper we are concerned with a class of stochastic multicommodity network flow problems, the so called capacity expansion planning problems. We consider a two-stage stochastic optimization formulation that incorporates uncertainty in the problem parameters. To address the computational complexity of these stochastic models, we propose a decomposition method to divide the original problem into smaller, tractable subproblems that are solved in parallel at the network nodes. Unlike relevant techniques in existing literature that decompose the problem with respect to the possible realizations of the random parameters, our approach can be applied to networked systems that lack a central processing unit and require autonomous decision making by the network nodes. Our method relies on the recently proposed Accelerated Distributed Augmented Lagrangians (ADAL) algorithm, a dual decomposition technique with regularization, which achieves very fast convergence rates.

关键词： Optimization Convergence Stochastic processes Vectors Capacity planning Algorithm design and analysis Acceleration

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Robust H∞ control of Theodorsen's lift model for a pitching and plunging airfoil using LMI approach

Robust H∞ control of Theodorsen's lift model for a pitching...

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31st AIAA Applied Aerodynamics Conference

作者： Li, Zhicheng Agarwal, Ramesh K. Gao, Huijun Dept. of Mechanical Engineering and Materials Science Washington University St. Louis MO 63130 United States Research Institute of Intelligent Control and Systems Harbin Institute of Technology Harbin 150001 China

This paper develops a robust H∞ controller for a pitching and plunging airfoil using the state space representation of Theodorsen's lift model employing the linear matrix inequalities (LMI) method. Both parameter uncertainty and the input disturbances are considered in the model. The existence condition for the robust H∞ state-feedback controller is obtained using the Lyapunov functional approach. In practical systems, it is difficult to obtain all the states of the model needed for the controller. Thus the observer existence condition is proposed to provide the states' information for the model. Several examples are used to demonstrate the effectiveness of the designed controller and the designed observer.

关键词： Controllers

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Dual-Gate MOSFETs on Monolayer CVD MoS_2 Films

Dual-Gate MOSFETs on Monolayer CVD MoS_2 Films

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Annual Device Research Conference

作者： H. Liu M. Si S. Najmaei A. T. Neal Y. Du P. M. Ajayan J. Lou P. D. Ye School of Electrical and Computer Engineering Purdue University Dept. of Mechanical Engineering and Materials Science Rice University

ISBN: (纸本)9781479908134

Monolayer MoS_2 with a direct band gap of 1.8 eV is a promising two-dimensional material with a potential to surpass graphene in next generation nanoelectronic applications.[1-3] We have synthesized monolayer MoS_2 thin films via chemical vapor deposition (CVD) method on Si/SiO_2 substrate and comprehensively study the device performance and variation on dual-gated MoS_2 field-effect transistors. Over 100 devices are studied to obtain a statistical description of device performance on monolayer CVD MoS_2. We have achieved record high drain current of 62.5 mA/mm in CVD monolayer MoS_2 films ever reported. [4] We further extract the intrinsic contact resistance of low work function metal Ti on monolayer CVD MoS_2 with an expectation value of 175 Ω·mm, which can be significantly decreased to 10 Ω·mm by appropriate gating. By taking the impact of contact resistance into account, average and max intrinsic field-effect mobility is estimated to be 13.0 and 21.6 cm~2/V·s in monolayer CVD MoS_2 films. The MoS_2 crystal growth was carried out in a furnace on 285 nm SiO_2 capped p~(++) Si substrate by sulfurization of MoO_3 via CVD method shown in Fig. 1(a). Optical and AFM images of the monolayer MoS_2 crystals with triangle domains are shown in Fig. 1(b) and (c). MoS_2 crystals are single layers with good uniformity. [5] After material synthesis, source/drain regions are defined with e-beam lithography followed by Ti/Au deposition as contacts. After a 1 nm Al deposition as the seeding layer, 15 nm Al_2O_3 was grown at 200℃ by ALD used as top gate dielectric. Ni/Au that covers the whole channel served as the top gate. Fig. 2(a) shows the schematic device structure of the dual-gate MoS_2 MOSFET. Over 100 devices were fabricated with channel length varied between 100 nm to 1 μm. Fig. 2(b) shows the output curves of a 100 nm channel length back-gate devices with record-high maximum drain current of 62.5 mA/mm. Fig. 2(c) shows the output curves of a 1μm channel length top-gate de

关键词： contact resistance Drain current Figs Chemical vapor deposition Monolayers equipment performance EXPECTATION VALUE FIELD EFFECT MOBILITY Cardiovascular Diseases

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Immunotherapy Bridge 2016 and Melanoma Bridge 2016: meeting abstracts

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Journal of Translational Medicine 2017年第1期15卷 1-14页

作者： Vera Hirsh Sandro Pignata Melissa Bersanelli Donatello Gasparro Francesco Leonardi Sebastiano Buti Letizia Gnetti Cinzia Azzoni Lorena Bottarelli Enrico Maria Silini Erik Wennerberg Sandra Demaria Claire Vanpouille-Box Karsten Pilones Nils Rudqvist Julie Diamond Silvia Formenti Aranzazu Mediero Bruce Cronstein Zachary S. Morris Emily I. Guy David M. Francis Monica M. Gressett Eric A. Armstrong Shyhmin Huang Jacquelyn A. Hank Anna Hoefges Alexander L. Rakhmilevich Paul M. Harari Paul M. Sondel Stephen D. Gilles Alan J. Korman Yared Hailemichael Willem W. Overwijk Per thor Straten Alessandro Lugli Heather Dawson Annika Blank Inti Zlobec Luigi Fattore Susan Costantini Maria Elena Pisanu Paolo Antonio Ascierto Gennaro Ciliberto Debora Malpicci Mario Acunzo Giulia Romano Giovanni Nigita Carlo Maria Croce Alessandro Laganà Ciro Francesco Ruggiero Alessia Noto Claudia De Vitis Rita Mancini Michael Postow Jason Luke David Stroncek Luciano Castiello Wenjing Chen Ping Jin Jiaqiang Ren Marianna Sabatino Soldano Ferrone Connie PM Duong Marie Vetizou Laurence Zitvogel Marcella Occelli Carolina Cauchi Cristiana Lo Nigro Chiara Varamo Daniela Vivenza Silvia Violante Laura Lattanzio Marco Carlo Merlano Grazia Sciancalepore Giuseppe Forte Michela Rovera Zelda Seia Stefania Palazzini Fabiana Errico Davide Basso Laura Quaranta Fulvio Lavagna Paolo Bosio Duane Moogk Shi Zhong Victoria Fang Janna Dougherty Arianne Perez-Garcia Iman Osman Michelle Krogsgaard Zhiya Yu Nicholas P. Restifo Ivan Liadi Navin Varadarajan William Rittase Cheng Zhu Alan Frey Timea Balatoni Gabriella Liszkay Miklós Kasler Anita Moho Timea Sebestyén Anita Varga Judit Oláh Zsuzsanna Lengyel Gabriella Emri Andrea Ladányi Beatrice Polini Stefano Fogli Sara Carpi Maria Cristina Breschi Paola Nieri Barbara Pardini Alessio Naccarati Nevio Dubbini Antonella Romanini Francesca Morgese Davide Soldato Silvia Pagliaretta Riccardo Giampieri Silvia Rinaldi Mariangela Torniai Agnese Savini Azzurra Onofri Francesca Bianchi Rossana Berardi Donatella Brancorsini Anna Campanati McGill University Health Centre Cedars Cancer Centre Montreal QC Canada Dipartimento Uro-Ginecologico S.C. Oncologia Medica Uro-Ginecologica Istituto Nazionale Tumori Fondazione “G. Pascale” Napoli Italy Medical Oncology University Hospital of Parma Via Gramsci 14 43126 Parma PR Italy Anatomic Pathology Unit University Hospital of Parma Via Gramsci 14 43126 Parma PR Italy Weill Cornell Medicine Cornell University New York NY USA Department of Radiation Oncology Weill Cornell Medical College New York NY USA New York University Langone Medical Center New York NY USA Dept. of Human Oncology School of Medicine and Public Health University of Wisconsin Madison WI USA Provenance Biopharmaceuticals Carlisle MA USA Bristol-Myers Squibb Company Redwood City CA USA Department of Melanoma Medical Oncology The University of Texas MD Anderson Cancer Center Houston TX USA Department of Hematology Center for Cancer Immune Therapy (CCIT) University Hospital Herlev Copenhagen Denmark Department of Immunology and Microbiology University of Copenhagen Copenhagen Denmark Institute of Pathology University of Bern Bern Switzerland Istituto Nazionale per lo Studio e la Cura dei Tumori “Fondazione G. Pascale” Naples Italy Dipartimento di Chirurgia “P. Valdoni” Sapienza Università di Roma Rome Italy IRCCS Pascale Naples Italy Dipartimento Melanoma Tessuti molli Muscolo-Scheletrico e Testa-Collo Oncologia Medica Melanoma Immunoterapia Oncologica e Terapie Innovative Istituto Nazionale Tumori “G. Pascale” Via M. Semmola 80131 Naples Italy Dipartimento di Medicina Sperimentale e Clinica Università degli Studi di Catanzaro “Magna Graecia” Catanzaro Italy Department of Molecular Virology Immunology and Medical Genetics The Ohio State University Comprehensive Cancer Center Columbus OH USA Department of Genetics and Genomic Sciences Icahn School of Medicine at Mount Sinai New York NY USA Dipartimento di Medicina Clinica e Molecolare Sapienza Università di Roma Rome

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First Principles and Experimental Study of Surface Redox Reactions in Li2MnO3

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ECS Meeting Abstracts 2014年第4期MA2014-04卷

作者： Duho Kim Jin-Myoung Lim Young-Geun Lim Minsik Park Jeom-Soo Kim Young-Jun Kim Maenghyo Cho Kyeongjae Cho Department of Mechanical and Aerospace Engineering Seoul National University Korea. Advanced Batteries Research Center Korea Electronics Technology Institute Korea. Materials Science & Engineering Dept. The University of Texas at Dallas Richardson 75080 Texas USA

The development of rechargeable lithium-ion batteries (LIB) has progressed rapidly to meet the demand for consumer electronic devices such as cellular phones and laptop computers, and the recent demands for larger energy storage applications (xEV and grid storage) require further development of LIB or alternative energy storage technology. Among possible alternative cathode materials compared to the currently used material LiCoO2, Li-rich compounds xLi2MnO3(1-x)LiMO2 (M = Ni, Co, Mn) are the most promising candidate with higher capacity, lower cost and absence of toxic element. Within the two-component composite compounds, Li2MnO3 plays a central role in increasing the capacity of the compounds and independently possess a high theoretical capacity of 460 mAh/g (if the entire lithium is utilized). Although the Li2MnO3 is not electrochemically active between 2.0V and 4.4V, it is active to extract lithium ions over 4.5V. During the initial delithiation process, Li2MnO3 is known to transform into layered LiMnO2structure, and the subsequent charge/discharge cycling induces a gradual phase transformation to the spinel structure, resulting in lowering voltage plateau and a large irreversible capacity accompanied by oxygen loss. To overcome these capacity loss problems, diverse approaches have been made to improve electrochemical properties of the cathode materials: adjusting the relative ratio of different transition metal ions, coating layers on the particles, and synthesizing at various temperature to control specific surface area. Even though the bulk properties of cathode materials have been studied by many research groups, the surface properties of cathode have seldom been researched so far. Specifically, theoretical study on cathode surface has been rarely performed even though major reactions and chemical transformations occur near the surface and interfaces between different phases. Recently, several research groups highlighted and reported experimental observation

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First Principles and Experimental Study of Phase Transformation Mechanism of Li-Rich Oxide Cathode Material in Li-Ion Battery

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ECS Meeting Abstracts 2014年第4期MA2014-04卷

作者： Jin-Myoung Lim Duho Kim Young-Geun Lim Min-Sik Park Jeom-Soo Kim Young-Jun Kim Kyeongjae Cho Maenghyo Cho Department of Mechanical and Aerospace Engineering Seoul National University Korea. Advanced Batteries Research Center Korea Electronics Technology Institute Korea. Materials Science & Engineering Dept. The University of Texas at Dallas Richardson 75080 Texas USA

Li-rich oxide cathode is one of the most promising high capacity cathode materials for the next commercialized Li-ion battery application, and its composition can be described as a mixture of Li2MnO3 and Li(TM)O2(TM: Transition metal). Li-rich cathode material has large capacity based on relatively cheap Mn oxide, and it is easy to synthesize. However, the Li-rich cathode material has critical material challenges such as capacity degradation and voltage drop. It has been reported that the main source of the material challenge is related to phase transformation inside the bulk cathode material during charge/discharge processes. In this work, detailed phase transformation mechanism of Li2MnO3 is investigated by combining the experimental and computational approaches to develop fundamental understanding on the atomic scale processes. The structure of Li-rich oxide is a composite of Li2MnO3 and layered Li(TM)O2, and the monoclinic layered structure of Li2MnO3 is known to be the source of the degradation problems. We have observed the evidence of phase transformation in Li2MnO3experimentally, and a theoretical analysis based on density functional theory calculations is combined with experimental data for a systematic comparative study. For experimental study, we have synthesized Li2MnO3 powder by solid state method at low temperature following the literature procedures. Using this powder, we made a coin cell with standard Li reference electrode, and the CV measurement shows the phase transformation during charge/discharge processes. First, basic powder characterization was conducted through XRD, and SEM analyses. Second, coin cell was assembled for cyclic performance test, and charge/discharge profile and cyclic voltammogram were obtained. From the experimental investigation, synthesized Li2MnO3is identified as monoclinic C2/m space group structure and their particle size is around 200~300 nm. The evidences of phase transformation are found from cyclic charge/discharge p

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