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3D Hessian deconvolution of thick light-sheet z-stacks for high-contrast and high-SNR volumetric imaging

Photonics Research 2020年第6期8卷 1011-1021页

作者： ZHE ZHANG dongzhou gou FAN FENG RUYI ZHENG KE DU HONGRUN YANG GUANGYI ZHANG HUITAO ZHANG LOUIS TAO LIANGYI CHEN HENG MAO LMAM School of Mathematical SciencesPeking UniversityBejing 100871China State Key Laboratory of Membrane Biology Bejing Key Laboratory of Cardiometabolic Molecular MedicineInstitute of Molecular MedicinePeking UniversityBeijing 100871China Center for Bioinformatics National Laboratory of Protein Engineering and Plant Genetic EngineeringSchool of Life SciencesPeking UniversityBeijing 100871China School of Software and Microelectronics Peking UniversityBeijing 100871China Bejing Advanced Innovation Center for Imaging Theory and Technology Cepital Normal UniversityBeijing 100871China

Due to its ability of optical sectioning and low phototoxicity,z-stacking light-sheet microscopy has been the tool of choice for in vivo imaging of the zebrafish *** image the zebrafish brain with a large field of view,the thickness of the Gaussian beam inevitably becomes several times greater than the system depth of field(DOF),where the fluorescence distributions outside the DOF will also be collected,blurring the *** this paper,we propose a 3D deblurring method,aiming to redistribute the measured intensity of each pixel in a light-sheet image to in situ voxels by 3D *** introducing a Hessian regularization term to maintain the continuity of the neuron dis-tribution and using a modified stripe removal algorithm,the reconstructed z stack images exhibit high contrast and a high signal-to-noise *** performance characteristics can facilitate subsequent processing,such as 3D neuron registration,segmentation,and recognition.

关键词： Hessian image thick

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Pressure-Induced Topological and Structural Phase Transitions in an Antiferromagnetic Topological Insulator

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Chinese Physics Letters 2020年第6期37卷 57-65页

作者： Cuiying Pei Yunyouyou Xia Jiazhen Wu Yi Zhao Lingling Gao Tianping Ying Bo Gao Nana Li Wenge Yang dongzhou Zhang Huiyang gou Yulin Chen Hideo Hosono Gang Li Yanpeng Qi School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China Shanghai Institute of Optics and Fine Mechanics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China Materials Research Center for Element Strategy Tokyo Institute of TechnologyYokohama 226-8503Japan Center for High Pressure Science and Technology Advanced Research(HPSTAR) Shanghai 201203China Hawai’i Institute of Geophysics and Planetology School of Ocean and Earth Science and TechnologyUniversity of Hawai’i at ManoaHonoluluHawaii 96822USA Department of Physics Clarendon LaboratoryUniversity of OxfordOxford 0X13PUUK ShanghaiTech Laboratory for Topological Physics ShanghaiTech UniversityShanghai 200031China

Recently,natural van der Waals heterostructures of(MnBi2 Te4)m(Bi2 Te3)n have been theoretically predicted and experimentally shown to host tunable magnetic properties and topologically nontrivial surface *** systematically investigate both the structural and electronic responses of MnBi2 Te4 and MnBi4 Te7 to external *** addition to the suppression of antiferromagnetic order,MnBi2 Te4 is found to undergo a metalsemiconductor-metal transition upon *** resistivity of MnBi4 Te7 changes dramatically under high pressure and a non-monotonic evolution of p(T)is *** nontrivial topology is proved to persist before the structural phase transition observed in the high-pressure *** find that the bulk and surface states respond differently to pressure,which is consistent with the non-monotonic change of the ***,a pressure-induced amorphous state is observed in MnBi2 Te4,while two high-pressure phase transitions are revealed in MnBi4 *** combined theoretical and experimental research establishes MnBi2 Te4 and MnBi4 Te7 as highly tunable magnetic topological insulators,in which phase transitions and new ground states emerge upon compression.

关键词： nontrivial topological resistivity

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