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Defence Technology（防务技术） 2024年第5期35卷 47-59页

作者： a.exa.dre riot Enrico Panettieri Antonio Cosculluela Marco Montemurro Universite de Bordeaux Arts et Metiers Institute of TechnologyCNRSINRABordeaux INPHESAM UniversiteI2M UMR 5295F-33405 TalenceFrance French Atomic Energy Commission Route des GargailsCedexF-33114Le BarpFrance

Modern additive manufacturing processes enable fabricating architected cellular materials of complex shape,which can be used for different *** them,lattice structures are increasingly used in applications requiring a compromise among lightness and suited mechanical properties,like improved energy absorption capacity and specific stiffness-to-weight and strength-to-weight ratios.A dedicated modeling strategy to assess the energy absorption capacity of lattice structures under uni-axial compression loading is presented in this *** numerical model is developed in a non-linear framework accounting for the strain rate effect on the mechanical responses of the lattice *** geometries,i.e.,cubic body centered cell,octet cell,rhombic-dodecahedron and truncated cuboctahedron 2+,are ***,the influence of the relative density of the representative volume element of each geometry,the strain-rate dependency of the bulk material and of the presence of the manufacturing process-induced geometrical imperfections on the energy absorption capacity of the lattice structure is *** main outcome of this study points out the importance of correctly integrating geometrical imperfections into the modeling strategy when shock absorption applications are aimed for.

关键词： Lattice structures Architected cellular materials Dynamic simulation Energy absorption Geometrical imperfection Additive manufacturing

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Corrosion Investigation by Scanning Electrochemical Microscopy of AISI 446 and Ti-Coated AISI 446 Ferritic Stainless Steel as Potential Material for Bipolar Plate in PEMWE

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Acta Metallurgica Sinica(English Letters) 2024年第4期37卷 607-619页

作者： Andrea Kellenberger Nicolae Vaszilcsin Mircea Laurentiu Dan Ion Mitelea Alexandru Adrian Geana Sigrid Lædre Corneliu M.Craciunescu Faculty of Industrial Chemistry and Environmental Engineering Politehnica University TimisoaraPiata Victoriei 2300006TimisoaraRomania Faculty of Mechanical Engineering Politehnica University TimisoaraPiata Victoriei 2300006TimisoaraRomania SINTEF Industry 7465TrondheimNorway

The components of proton exchange membrane water electrolysers frequently experience corrosion issues, especially at high anodic polarization, that restrict the use of more affordable alternatives to titanium. Here, we investigate localized corrosion processes of bare and Ti-coated AISI 446 ferritic stainless steel under anodic polarization by scanning electrochemical microscopy (SECM) in sodium sulphate and potassium chloride solutions. SECM approach curves and area scans measured at open-circuit potential (OCP) of the samples in the feedback mode using a redox mediator evidence a negative feedback effect caused by the surface passive film. For the anodic polarization of the sample, the substrate generation-tip collection mode enables to observe local generation of iron (II) ions, as well as formation of molecular oxygen. For the uncoated AISI 446 sample, localized corrosion is detected in sodium sulphate solution simultaneously with oxygen formation at anodic potentials of 1.0 V vs. Ag/AgCl, whereas significant pitting corrosion is observed even at 0.2 V vs. Ag/AgCl in potassium chloride solution. The Ti-coated AISI 446 sample reveals enhanced corrosion resistance in both test solutions, without any evidence of iron (II) ions generation at anodic potentials of 1.2 V vs. Ag/AgCl, where only oxygen formation is observed.

关键词： Ferritic stainless steel Corrosion Ti coating Scanning electrochemical microscopy(SECM) Magnetron sputtering Proton exchange membrane water electrolysis(PEMWE)

Influence of manufacturing process-induced geometrical defects on the energy absorption capacity of polymer lattice structures

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Roles of macrophages in tumor development: a spatiotemporalperspective

Defence Technology 2024年第5期 47页

作者： a.exa.dre riot Enrico Panettieri Antonio Cosculluela Marco Montemurro

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Cellular & Molecular Immunology 2023年第9期20卷 983-992页

作者： Mathilde Bied William W.Ho Florent Ginhoux Camille Blériot Institut Gustave Roussy INSERM U1015VillejuifFrance Singapore Immunology Network(SIgN) Agency for ScienceTechnology and Research(A∗STAR)SingaporeSingapore Shanghai Institute of Immunology Shanghai JiaoTong University School of MedicineShanghaiChina Translational Immunology Institute SingHealth Duke-NUSSingaporeSingapore Institut Necker des Enfants Malades INSERMCNRSUniversitéParis CitéParisFrance

Macrophages are critical regulators of tissue homeostasis but are also abundant in the tumor microenvironment (TME). In bothprimary tumors and metastases, such tumor-associated macrophages (TAMs) seem to support tumor development. While we knowthat TAMs are the dominant immune cells in the TME, their vast heterogeneity and associated functions are only just beingunraveled. In this review, we outline the various known TAM populations found thus far and delineate their specialized rolesassociated with the main stages of cancer progression. We discuss how macrophages may prime the premetastatic niche to enablethe growth of a metastasis and then how subsequent metastasis-associated macrophages can support secondary tumor ***, we speculate on the challenges that remain to be overcome in TAM research.

关键词： Macrophages Tumor associated macrophages Tumor microenvironment Metastasis

Diffusive Lorenz dynamics: Coherent structures and spatiotemporal chaos

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Communications in Nonlinear Science and Numerical Simulation 2000年第2期5卷 49-57页

作者： Yuehong QIAN Hudong CHEN and Da-Hsuan FENG (exa Corporation, 450 Bedford Street, Lexington, MA 02420, USA email: qian@***, hudong@exa. Com Department of Physics, drexel University, Philadelphia, PA 19104, USA email: da.hsuan.feng@***) exa Corporation 450 Bedford Street Lexington MA 02420 USA Department of Physics Drexel University Philadelphia PA 19104 USA

In this paper, we are interested in collective behaviors of many interacting Lorenz strange attractors. With an intermediate chion coupling between the attractors,a new remarkable synchronization of well orgtried structuxes merges as a result of two competing mechanisms: temporal chaos and spatial chsive stabilization. A window of the coupling parazneter for coherent structures is found numerically. Different from all exist ing scenarios of routes to chaos (period doubling, intermittency and strange attractors), an algorithmetic increase of wavenumbers before an abrupt change to chaos (compared to the periodic doubling geometrical) is unexpectedly discovered. Metastable states are also ob served in simulations.

关键词： synchronizied chaos coherent structures intermittency reaction-diffusion

Third Millennium Physics Come out from the Mind of Ettore Majorana

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Journal of Life Sciences 2017年第3期11卷 155-162页

作者： Roberta riot Francesco Alessandrini Historian and Member of the German Federation of Historians Maria Saa19063 Austria Engineer and Free Researcher Udine 33100 Italy

A new fourth order finite difference scheme for the heat equation

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Communications in Nonlinear Science and Numerical Simulation 2000年第4期5卷 151-157页

作者： Yuehong QIAN, Hudong CHEN, Raoyang ZHANG and Shiyi CHEN (exa Corporation, 450 Bedford Street, Lexington, MA 02420, USA e-mail.. qean＠*** Deportment of Mechanical Engineering, Johns Hopkins University, Baltimore, MD 21280, USA) (Received December 1, exa Corporation 450 Bedford Street Lexington MA 02420 United States Department of Mechanical Engineering Johns Hopkins University Baltimore MD 21280 United States

We propose and investigate a new simple fourth order finite difference scheme for the heat equation. Numerical simulations do confirm theoretical analysis of accuracy and stability condition.

关键词： heat equation CFL condition stability high-order scheme

New direction of computational fluid dynamics and its applications in industry

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Science China(Technological Sciences) 2007年第5期50卷 521-533页

作者： CHEN YaoSong1, SHAN XiaoWen2 & CHEN HuDong2 1 Department of Mechanics, Peking University, Beijing 100871, China 2 exa Corporation, Burlington, MA 01803 USA Department of Mechanics Peking University Beijing China exa Corporation Burlington USA

For the past ten years there has been much progress in computational fluid dy- namics (CFD), among which the formation and development of the lattice Boltz- mann method (LBM) are an important new direction. We give a review on the main aspect and the latest development of this method in this article, and at the same time we also discuss the related development of scientific software and its impact on the real-world applications in industry.

关键词： lattice method, Boltzmann equation, CFD

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对话·史益豪、李国鹏、胡硕杰、黎光维、陈泽彬

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电子竞技 2020年第10期 34-43页

作者：凌婕 riot Games(图) 不详苏宁电子竞技俱乐部

Q:来到苏宁执教,你遇到什么困难?A:前半年我感觉特别辛苦,后面还可以。如果是我亲自选的选手,我就觉得他们一定会赢,因为我知道怎么让他们发挥各自的能力。刚来的前半年,就是突然出现了一个队伍要带,那我就觉得不知道为什么会把这东西... 详细信息

Q:来到苏宁执教,你遇到什么困难?A:前半年我感觉特别辛苦,后面还可以。如果是我亲自选的选手,我就觉得他们一定会赢,因为我知道怎么让他们发挥各自的能力。刚来的前半年,就是突然出现了一个队伍要带,那我就觉得不知道为什么会把这东西凑在一起,太恐怖了。我脑子有个画面,这五个人出来,不管怎么样都没有办法平衡,就是这种感觉。Q:现在这五个人是如何凑在一起的呢?有什么考量?A:配置这五个人的时候,就是选择化学效应比较好的。同样的五个人,一个拿掉,甚至换成一个貌似更强的人进来,未必会更好,这是英雄联盟的一个特点。在队伍的组合上面,如果是棒球,我找全世界最会投球的投手、最会打击的、最猛的防守……全部都是最猛的人凑在一起玩,应该是真的很强,应该是真的无懈可击。

关键词：化学效应投手英雄联盟防守感觉无懈可击

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21世纪什么最重要电脑帮我考证书

电脑迷 2009年第5期 46-52页

作者：陈相 dre 小刀

21世纪什么最重要?就是"人才"。什么样的人叫"人才"?就是有能力的人。怎样才是有能力的人呢?当然是要有经历与学历。经历,就是工作经验,但对我们很多大学生来说,是没有工作经验的。所以对即将步入社会的学子们来讲,什么最重要?学历。学... 详细信息

21世纪什么最重要?就是"人才"。什么样的人叫"人才"?就是有能力的人。怎样才是有能力的人呢?当然是要有经历与学历。经历,就是工作经验,但对我们很多大学生来说,是没有工作经验的。所以对即将步入社会的学子们来讲,什么最重要?学历。学历,除了大学本科毕业证书、研究生证书之外,就是英语证书、培训证书等其他专业类证书。那怎样才能得到证书呢?简单,就是考试。为什么还有那么多朋友考不过?原因更简单,就是没找对方法,没有记忆,不够聪明。这些问题,其实电脑都可帮我们解决。(归根到底,21世纪什么最重要?其实是电脑最重要。)(所有考试时间、模拟软件与考试题库已收入本期光盘)

关键词：题库按钮试题仓库英语点击证书英文字幕 CCNA 网页设计师软件模拟