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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Fast Magnetic Resonance Imaging and Inverse Problems
快速 磁共振成像 逆问题
2023/4/17
磁共振成像是目前医学成像技术中功能最强大，技术门槛最复杂的技术之一。然而，相对其他成像模态较为缓慢的采集速度（较长的扫描时间）制约了磁共振成像在临床上的广泛应用。借助采样样本的数量与扫描时间的正比关系，通过减少采集的数据量（稀疏采样）来缩短磁共振采集时间是磁共振成像领域的重要途径，而从高度欠采样的数据中重建出高质量的图像可以近似为一个病态反问题，对这一问题的求解是快速磁共振成像领域的研究热点。本次...
Isospin Character of the Pygmy Dipole Resonance in 124Sn
Isospin Character Pygmy Dipole Resonance
2011/1/10
The pygmy dipole resonance has been studied in the proton-magic nucleus 124Sn with the ( , ′) coincidence method at E = 136 MeV.
Shape resonance for the anisotropic superconducting gaps near a Lifshitz transition: the effect of electron hopping between layers
Shape resonance anisotropic superconducting gaps effect of electron
2010/11/24
The multigap superconductivity modulated by quantum confinement effects in a superlattice of
quantum wells is presented. Our theoretical BCS approach captures the low-energy physics of a
shape reson...
We performed inelastic neutron scattering on powder sample of the P-doped iron-based super-
conductor BaFe2(As0.65P0.35)2 with Tc = 30 K, whose superconducting (SC) order parameter is
expected to ha...
Incommensurate spin-density wave and multiband superconductivity in Na$_{x}$FeAs as revealed by nuclear magnetic resonance
Incommensurate spin-density wave multiband superconductivity nuclear magnetic resonance
2010/11/18
We report a 23Na and 75As nuclear magnetic resonance (NMR) investigation of NaxFeAs series
(x = 1, 0.9, 0.8) exhibiting a spin-density wave (SDW) order below TSDW = 45, 50 and 43 K for
x = 1, 0.9, 0...
Spin Torque Ferromagnetic Resonance Induced by the Spin Hall Effect
Spin Torque Ferromagnetic Resonance Spin Hall Effect
2010/11/22
We demonstrate that the spin Hall effect in a thin film with strong spin-orbit scattering
can excite magnetic precession in an adjacent ferromagnetic film. The flow of alternating current through a P...
Resonance Parameters of the rho-Meson from Lattice QCD
pion-pion scattering phase -meson resonance parameters lattice QCD
2011/1/6
We perform a non-perturbative lattice calculation of the P-wave pion-pion scattering phase in
the -meson decay channel using two flavors of maximally twisted mass fermions at pion masses
ranging fr...
Critical-doping universality for cuprate superconductors: Oxygen nuclear-magnetic-resonance investigation of Ca(x)La(1-x)Ba(1.75-x)La(0.25+x)Cu(3)O(y)
cuprate superconductors Oxygen nuclear-magnetic-resonance investigation
2010/11/18
The critical doping levels in cuprates, where the ground state changes its nature (from an an-
tiferromagnet to a spin glass to superconductor to metal), are not universal. We investigate the origin ...
Towards T1-limited magnetic resonance imaging using Rabi beats
T1-limited magnetic resonance imaging Rabi beats
2010/10/18
Two proof-of-principle experiments towards T1-limited magnetic resonance imaging with NV cen-
ters in diamond are demonstrated. First, a large number of Rabi oscillations is measured and it is demons...
Stark-tuned Förster resonance and dipole blockade between 2 to 5 cold Rydberg atoms: Monte-Carlo simulations for various spatial configurations
Stark-tuned Fö rster resonance dipole blockade cold Rydberg atoms Monte-Carlo various spatial configurations
2010/10/18
Results of the numerical Monte-Carlo simulations for the Stark-tuned F¨orster resonance and dipole blockade between 2 to 5 cold rubidium Rydberg atoms in various spatial configurations are presented.E...
Resonance induced by repulsive interactions in a model of globally-coupled bistable systems
Resonance induced globally-coupled bistable systems repulsive interactions
2010/4/1
We show the existence of a competition-induced resonance effect for a generic globally coupled bistable system. In particular, we demonstrate that the response of the macroscopic variable to an extern...
专著信息
书名
Doping dependence of the resonance peak and incommensuration in high-Tc superconductors,
语种
英文
撰写或编译
作者
J.-X. Li,C.-D. Gong
第一作者单位
出版社
Physical Review B66, 014506 (2002)
出版地
出版日期
2002年
月
日
标准书...
专著信息
书名
Condensation energy and neutron resonance in high-Tc superconductors
语种
英文
撰写或编译
作者
J.X.Li,C.Y.Mou,C.D.Gong,T.K.Lee
第一作者单位
出版社
Physical Review B64, 104518 (2001)
出版地
出版日期
2001年
月
日
标准书号
介质类型
页...