太阳城集团app-澳门太阳城集团娱乐城注册送彩金28_澳门百家乐群代理_一速全讯网111565官方 (中国)·官方网站

Mechanical and Mathematical Properties of Quasicrystals

作者:時(shí)間:2018-04-13瀏覽:1301供圖:審閱:來(lái)源:南京航空航天大學(xué)

字體:

報(bào)告題目:Mechanical and Mathematical Properties of Quasicrystals

報(bào)告人:   Prof. W?odzimierz DomańskiMilitary University of Technology

報(bào)告時(shí)間:2018414日(周六)下午15:30-1630

報(bào)告地點(diǎn):18號(hào)樓526會(huì)議室

主辦單位: 國(guó)際合作處、科協(xié)、機(jī)械結(jié)構(gòu)力學(xué)及控制國(guó)家重點(diǎn)實(shí)驗(yàn)室、航空宇航學(xué)院

報(bào)告摘要:

The discovery of quasicrystals in 1984 by D. Shechtman , destroyed the fundamental concepts of crystallography which relied on a traditional definition of a crystal as a periodic arrangement of identical unit cells.  In his experiments with a rapidly cooled Al-Mn alloy, Shechtman obtained a sharp diffraction pattern with a rotational symmetry incompatible with periodicity. His findings forced the International Union of Crystallography to redefine the notion of a crystal as any solid having discrete diffraction diagram.

Quasicrystals are new class of materials which thanks to their unique properties such as electrical, optical, hardness and nonstick features are finding new and promising applications e.g. in nonstick coatings, thermal barriers. infra red sensor etc. Two decades after the first publication on quasicrystals, a soft quasicrystal was found in nature and a number of materials including liquid crystals, polymers, nanoparticles and colloids enriched the family of soft quasicrystals , enhancing the potential applications of these quasi-periodic structures.

The talk will present a brief history of the discovery of quasicrystals and will discuss some of the fascinating mechanical and mathematical properties of quasicrystals. In particular the talk will focus on elastic constitutive relations in which besides the phonon space there is also a contribution from the phason space. The talk will present the form of the energy density function in some of these quasi-periodic structures. Recent findings of natural quasicrystals will also be mentioned.

報(bào)告人簡(jiǎn)介:

      W?odzimierz Domański, is currently a Professor of the Institute of Mathematics and Cryptology, a faculty of Cybernetics at the Military University of Technology. He was a Fulbright Postdoctoral Fellow Department of Mathematics and Program in Applied and Computational Mathematics, Princeton University, USA.

百家乐免费注册| 最新娱乐城注册送彩金| 安桌百家乐游戏百家乐| 必胜娱乐城| 百家乐科学| V博百家乐官网的玩法技巧和规则| 木棉百家乐网络| 百家乐官网大赌城| bet365网址| 百家乐人生信条漫谈| 百家乐官网连跳规律| 中骏百家乐的玩法技巧和规则| 百家乐官网翻天粤qvod| 免费百家乐统计| 大玩家百家乐游戏| 网络百家乐官网路单图| 大发888娱乐城下载新澳博| 阴宅24层手机罗盘| 打百家乐官网的介绍| 大发888在线娱乐城加盟合作| 百家乐代理商博彩e族| 百家乐官网永利赌场娱乐网规则 | 百家乐网址是多少| 澳门百家乐官网娱乐网| 百家乐官网是骗人的| 大发888官方 截图| 百家乐全部规| 大地百家乐官网的玩法技巧和规则| 大赢家百家乐官网66| 时时博娱乐城评级| 大发888娱乐官网| 金臂百家乐官网注册送彩金| 优博娱乐网| 大发888娱乐鸿博娱乐| 澳门百家乐游戏官网| 百家乐官网创立几年了| 百家乐官网五湖四海娱乐场| 真人百家乐官网导航| 澳门百家乐官网娱乐城怎么样| 明珠| 集结号棋牌下载|