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COE HPC

Bring High Performance Computing to Everyone in College of Engineering at Texas A&M University!

Texas A&M University College of Engineering

Seminars

TAMIDS Tech Talk: Machine Learning for Computational Engineering

Posted on September 24, 2020 by Jian Tao

Speaker: Kailai Xu, Ph.D. Student at Stanford University
Date: Tuesday, October 6, 2020
Time: 3:00 – 4:00PM US Central Time

Zoom Link: ​ https://tinyurl.com/yy8ldtfh

Abstract

ADCME is a novel computational framework to solve inverse problems involving physical simulations and deep neural networks (DNNs). By describing physical laws with partial differential equations (PDEs) and substituting unknown components with DNNs, we preserve the physics to the largest extent while leveraging DNNs for data driven modeling. To train the DNNs within a physical system, ADCME expresses both numerical simulations (e.g., finite element method) and DNNs as computational graphs and calculates the gradients using reverse-mode automatic differentiation. We have built a system of re-usable and flexible numerical simulation operators that support gradient-backpropagation for many engineering applications, such as seismic inversion, constitutive modelin g, Navier-Stokes equations, etc. ADCME also provides a computational model for conducting large-scale inverse modeling using MPI, and has been deployed across thousands of cores. The ADCME software is open -sourced and available at https://github.com/kailaix/ADCME.jl.

Biography

Kailai Xu is a Ph.D. student in computational mathematics at Stanford. His current research interest centers on machine learning for inverse problems in computational engineering. He has developed the open-source software ADCME.jl in Julia and C++ for high-performance inverse modeling using automatic differentiation. Specifically, he has developed novel physics-based machine learning algorithms and software packages based on ADCME.jl for solving inverse problems in stochastic processes, solid mechanics, geophysics and fluid dynamics. One highlight of his research is combining neural networks with numerical solvers for PDEs, which enables data-driven modeling with physics knowledge.

Filed Under: Seminars, Webinars

Hitchhiker’s Guide to High Performance Computing Seminar

Posted on October 17, 2017 by Jian Tao

From Microstructure to the Performance: A Computational Framework to Study the Response of Materials

Speaker: Vahid Attari
Location: Emerging Technologies Building (ETB) 3027
Time: Thursday, October 26, 2017 12:15 PM – 1:30 PM (CDT)

Abstract: The micropackaging technology in 3-Dimensional Integrated Circuits (3DIC) utilizes a three-level combined microbump and interconnection joint architecture. These micropackages are formed of thousands of interconnections, and hence confront significant design and materials related reliability concerns during service performance of these systems.
This seminar presents an integrated computational framework, incorporated by means of multiphase field approach together with electromigration model, vacancy evolution model, density functional theory, and dilute solution thermodynamic formalism to study the microstructure changes in Cu/Sn/Cu sandwich interconnection systems.
In the first stage, nucleation and growth of intermetallics during formation of the joint are investigated using the multi-phase field method. In the second stage, the performance of the joint under direct current fields for two of the obtained microstructural states are evaluated. It is shown that the intermetallic layer in the anode side grows faster while the intermetallic layer in the cathode side shrinks by increasing the current density. In the third stage, the equilibrium intrinsic point defect concentrations, solute site preferences in the crystal structure of the intermetallics, and the transient evolution of the point defects are investigated.

Brief Bio: Vahid Attari is a PhD candidate at the Department of Materials Science and Engineering, working for the computational materials science laboratory, under supervision of Dr. Raymundo Arroyave. He received his B.Sc. and M.Sc. degrees in Mechanical Engineering from Iran and Turkey, respectively. He first joined the research cohort at the Texas A&M University as a visiting research scholar during his master studies. His research is focused on phase field modeling, moving boundary problems, phase transformation, thermal, and electrical modeling of microstructural phenomena in materials. His research interests span mesoscopic study and modeling of behavior of the materials during transient phenomena. He has published one journal paper, one patent and presented his researches in International conferences such as ESOMAT, TMS and MS&T.

Website: http://arroyavelab.tamu.edu/people/vahid-attari/

Filed Under: Seminars

HPRC Seminar on May 1: Toughness, Roughness and Crack Path Engineering for Improved Fracture Resistance

Posted on April 23, 2017 by Jian Tao

Title: Toughness, Roughness and Crack Path Engineering for Improved Fracture Resistance

Speaker:        Dr. Alan Needleman, University Distinguished Professor

                      Professor, Department of Materials Science and Engineering

                      TEES Distinguished Research Professor

                      Texas A&M University

Date: May 1, 2017 2:00-3:00pm

Place: Koldus Building, Room 110

Abstract: I discuss the possibility of engineering crack paths by controlling the features of the microstructure, such as the distribution of second phase particles or the grain morphology, in a manner so as to increase the ductile crack growth resistance of structural metals. The focus is on ductile fracture where crack growth occurs by the nucleation, growth and coalescence of micro-scale voids. Simulations of crack growth in various microstructures are carried out in order to address some basic questions of fracture mechanics. One such question is, do cracks choose a minimum energy path? Another is, what is the relation, if any, between measures of the statistics of fracture surface roughness and the material’s ductile crack growth resistance? The extent to which a material’s crack growth resistance can be significantly increased by suitably designing its microstructure is explored. Perhaps surprisingly, it turns out that, in a range of circumstances, adding defects to a material can increase its fracture resistance. The important role of large-scale simulations in addressing these issues will be illustrated.

Anyone who attends will have an opportunity to win a door prize (tee-shirts and scarfs). Refreshments will be served after the seminar. Please help distribute this message to anyone who may be interested.

I am looking forwarding to seeing you at this seminar on May 1.

Honggao Liu, PhD
Director, High Performance Research Computing (HPRC)
115 Henderson Hall
Texas A&M University (TAMU)

3361 TAMU

222 Jones St.

College Station, TX 77843-3361
Email: honggao@tamu.edu
Tel: 979.845.2561
Web: http://hprc.tamu.edu

Filed Under: Seminars

Updates

  • Dr. Jian Tao joined the Department of Visualization September 7, 2021
  • Parallel Computing with MATLAB Hands-On Workshop February 25, 2021
  • TAMIDS Scientific Machine Learning Lab February 1, 2021
  • TAMU Master of Science in Data Science February 1, 2021
  • HPRC/TAMIDS Workshop: Data Visualization and Geospatial Analysis With R November 3, 2020

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