搜索结果: 1-15 共查到“理学 crystals”相关记录133条 . 查询时间(0.049 秒)
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Approximation and computation for the linear and nonlinear eigenvalue problems in photonic crystals
光子晶体 线性非线性特征值问题 近似 计算
2023/5/15
In this talk, we discuss the approximation and computation for the linear and nonlinear eigenvalue problems in photonic crystals. We discretize the shifted Maxwell operator with edge finite elements a...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Computation of phononic crystals using the PG finite element method
PG有限元法 计算 声子晶体
2023/4/17
Phononic crystals are composite materials with periodic distribution of two or more media. The difficulty of computing the band structure of the phononic crystals lies in capturing the complex geometr...
In 1934, physicist Eugene Wigner made a theoretical prediction based on quantum mechanics that for decades years went unseen.
'Blinking' crystals may convert carbon dioxide into fuels（图）
Blinking crystals convert carbon dioxide into fuels
2020/7/24
Imagine tiny crystals that "blink" like fireflies and can convert carbon dioxide, a key cause of climate change, into fuels.A team funded by the U.S. National Science Foundation has created ...
You won’t find ice cubes like this in your freezer.An international team of scientists has set a new record for creating ice crystals that have a near-perfect cubic arrangement of water molecules—a fo...
Crystals once deep inside a volcano offer new view of magma,eruption timing
Crystals deep inside a volcano eruption timing
2017/7/21
Volcanologists are gaining a better understanding of what's going on inside the magma reservoir that lies below New Zealand's Mount Tarawera volcano. They're finding a colder, more solid place than th...
Volcanologists are gaining a new understanding of what’s going on inside the magma reservoir that lies below an active volcano, and they’re finding a colder, more solid place than previously thought, ...
NYU Chemists Color World of 3D Crystals with Advances in Self-Assembly
NYU Chemists Color World 3D Crystals Self-Assembly
2017/3/30
A team of New York University chemists has created self-assembled, three-dimensional DNA crystals that can bind a separate, dye-bearing strand—a breakthrough that enhances the functionality of these t...
Researchers create 'time crystals' envisioned by Princeton scientists（图）
Researchers time crystals Princeton scientists
2017/3/30
Time crystals may sound like something from science fiction, having more to do with time travel or Dr. Who. These strange materials — in which atoms and molecules are arranged across space and time — ...
第四届声子晶体/声学超材料，声子传输/声子耦合与拓扑声子学国际会议（The 4th International Conference on Phononic Crystals/Metamaterials,Phonon Transport/Coupling and Topological Phononics ）
第四届 声子晶体/声学超材料，声子传输/声子耦合与拓扑声子学 国际会议
2017/1/11
“声子学（Phononics）”是近年来凝聚态物理领域发展起来的一门新兴学科。随着其相关研究工作不断从理论探索走向工程应用，工程实践驱动为该学科的发展注入了新的活力。声子学的发展体现出物理、振动、声学、热学、力学、材料和机械工程等多学科交叉融合发展的特点，受到国内外相关领域的广泛关注，展现出蓬勃的生命力和广阔的前景。声子学研究的基本对象是一种假想的虚拟粒子——“声子（Phonon）”。声子概念的提...
Unconventional quasiparticles predicted in conventional crystals
Unconventional quasiparticles predicted conventional crystals
2016/8/1
An international team of researchers has predicted the existence of several previously unknown types of quantum particles in materials. The particles — which belong to the class of particles known as ...
Polarized Absorption Spectra of Green Fluorescent Protein Single Crystals:Transition Dipole Moment Directions
Animals Scyphozoa Protons Threonine Serine Luminescent Proteins Green Fluorescent Proteins Microscopy, Fluorescence Amino Acid Substitution Spectrometry, Fluorescence
2016/5/24
Polarized absorption spectra of orthorhombic crystals of wild-type green fluorescent protein (GFP) were measured between 350 and 520 nm to obtain information on the directions of the electronic transi...
Crystals of Type B and Metaplectic Whittaker Functions
Metaplectic Whittaker Functions Type B
2015/7/6
Let n be an integer and let F be a nonarchimedean local eld whose characteristic
is not a prime dividing n. Let k be the group of k-th roots of unity in the algebraic
closure of F; we assume that ...
Automorphic forms are generalizations of periodic functions; they are functions on a group that
are invariant under a discrete subgroup. A natural way to arrange this invariance is by averaging.
Eis...
Facetless crystals that mimic starfish shells could advance 3-D-printing pills（图）
Crystal p 3-D-printing pills
2014/12/1
ANN ARBOR—In a design that mimics a hard-to-duplicate texture of starfish shells, University of Michigan engineers have made rounded crystals that have no facets.