报 告 人：Goong Chen 教授（Texas A&M University-德州农工大学）
报告题目：Computational Forensics for the Syrian Sarin Attack in April 2017：What Has Happened ?
报告时间：2017年10月25日（周三）上午10:00
报告地点：静远楼1506报告厅
报告人简介：
Goong Chen was born in Kaohsiung, Taiwan in 1950. He received his BSc (Math) from the National Tsing Hua University in Hsinchu, Taiwan in 1972 and PhD (Math) from the University of Wisconsin at Madison in 1977. He has taught at the Southern Illinois University at Carbondale (1977–78), and the Pennsylvania State University at University Park (1978–1987). Since 1987, he has been Professor of Mathematics and Aerospace Engineering, and (since 2000) a member of the Institute for Quantum Studies, at Texas A&M University in College Station, Texas. He has also held visiting positions at INRIA in Rocquencourt, France, Centre de Recherche Mathematiques of the Universit´e de Montr´eal, the Technical University of Denmark in Lyngby, Denmark, the National University of Singapore, and National Tsing Hua University in Hsinchu, Taiwan.He has research interests in many areas of applied and computational mathematics: control theory for partial differential equations (PDEs), boundary element methods and numerical solutions of PDEs, engineering mechanics, chaotic dynamics, quantum computation, chemical physics and quantum mechanics. He has written over one hundred and fifty papers, seven advanced texts/monographs, and co-edited four books. He is an Editor-in-Chief of the Journal of MathematicalAnalysis and Applications, and the Editor-in-Chief of the Elsevier/Academic Press’ Mathematics in Science and Engineering Book Series. He has served as the Editor-in-Chief of the Chapman & Hall/CRC Press Applied Mathematics and Nonlinear Science Series (2002-2011), and as Associate Editor for several othereditorial boards, including the SIAM Journal on Control and Optimization, the International Journal on Quantum Information, Physica Scripta, and the Electronic Journal of Differential Equations. He is also a co-holder of a U.S. Patent on certain quantum circuit design for quantum computing. He has memberships in the American Mathematical Society (AMS) and the Society for Industrial and Applied Mathematics (SIAM).He is presently working on projects related to computational mechanics for contemporary problems. The article on the missing Malaysia Airlines flight MH370 published as the coverstory in the April 2015 issue of the Notices of The American Mathematical Society (AMS) with G. Chen as the lead author was named by the AMS as one in Top Math Stories in the Media - 2015.He is currently a Visiting Professor at the School of Mathematics and Statistics for the period of October 6 - December 29, 2017.
报告摘要：
In the morning between 6 ~ 7am of April 4, 2017 , a sarin chemical attack took place in Khan Shaykhun in the Idlib Governorate of Syria. It killed 86 people and injured more than 500. On the morning of 7 April 2017, 72 hours after the attack, the Trump Administration of the United States launched 59 Tomahawk cruise missiles from the USS Porter on Shayrat Airbase, as a punishments and a strong admonition.The only undisputable fact is that a chemical attack did take place. But the Syrian Government vehemently denied that it carried out the attack. Videos have been posted on the Internet alleging that a crater on the street of Khan Shaykhun was the scene where a chemical was dropped, causing the casualties. However, there are many inconsistencies about the crater and the debris that suggest the scene was staged and evidences were tampered. Dr. Theodore Postol, a top world weapon expert, has hypothesized some setupof munitions that may have caused the crater and the debris as shown in the videos.As the crater and the debris are the only available evidences, in this talk, we use the computer modeling tool of LS-DYNA to study and analyzethem for forensics. The explosion model in LS-DYNA is the Jones-Wilkins-Lee (JWL-) Equation of State. This equation is to be coupled with the conservation of mass, momentum, energy and constitutive equations for the numerical computation and simulation of the explosion and fracture effects. We will indicate how to proceed with the computation with LS-DYNA and the input, and also how to do data validation. Supercomputer results the outputs are then visualized throughseveral videos. Based on the videos, discussions and assessments about the chemical attack are then made. This research work is still ongoing and unfinished. Some future outlook will be provided.