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THREE NEw SPECIES Of GENONEOPSYLLA wu, wu & LIU, 1966 wITH A DISCUSSION ON THE CHARACTERS Of THE GENUS

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昆虫学报 1980年第3期 328-330页

作者： wu H.Y. HSIEH P.C. LIU L.C. TSAI L.Y. wu w.C. LIU C. CHANG w.f.

So far, only three species of Genoneopsylla were known from China andNepal. In the present paper three new species and one new record of the genus areherewith deseribed from western China. for comparison of the salient characters of the five species of the genus in Chinaa table is appended at the end of the paper. Since the rapid in crease of the species of Ge-

关键词： wITH A DISCUSSION ON THE CHARACTERS Of THE GENUS wu LIU THREE NEw SPECIES Of GENONEOPSYLLA wu

Coupling Alfvénic and Ion-Acoustic Solitons

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Chinese Physics Letters 1996年第8期13卷 594-597页

作者： wu De-jin wANG De-yu Carl-Gunne fälthammar Purple Mountain Observatory Chinese Academy of SciencesNanjing 210008*Department of Plasma PhysicsRoyal Institute of TechnologyStockholmSweden

An exact nonlinear equation governing the coupling Alfvénic and ion-acoustic solitons and criterion for their existence are *** the case of low-β plasmas,the two modes *** the small amplitude limit,the analytical re... 详细信息

关键词： solitons exact criterion

Printable Aligned Single-walled Carbon Nanotube film with Outstanding Thermal Conductivity and Electromagnetic Interference Shielding Performance

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Nano-Micro Letters 2022年第11期14卷 143-156页

作者： Zhihui Zeng Gang wang Brendan f.wolan Na wu Changxian wang Shanyu Zhao Shengying Yue Bin Li weidong He Jiurong Liu Joseph w.Lyding Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of EducationSchool of Materials Science and EngineeringShandong UniversityShandongJinan 250061People’s Republic of China Department of Electrical and Computer Engineering Beckman Institute for Advanced Science and TechnologyUniversity of Illinois at Urbana-ChampaignUrbanaIL 61801USA Department of Chemistry Swiss Federal Institute of Technology in Zurich(ETH Zürich)8092 ZurichSwitzerland School of Materials Science and Engineering Nanyang Technological University50 Nanyang AvenueSingapore 639798Singapore Empa Swiss Federal Laboratories for Materials Science and TechnologyÜberland Strasse 1298600 DübendorfSwitzerland Institute for Advanced Technology Shandong UniversityJinan 250061People’s Republic of China

Ultrathin,lightweight,and flexible aligned single-walled carbon nanotube(SwCNT)films are fabricated by a facile,environmentally friendly,and scalable printing *** aligned pattern and outstanding intrinsic properties render“metal-like”thermal conductivity of the SwCNT films,as well as excellent mechanical strength,flexibility,and ***,the aligned cellular microstructure promotes the electromagnetic interference(EMI)shielding ability of the SwCNTs,leading to excellent shielding effectiveness(SE)of~39 to 90 dB despite a density of only~0.6 g cm^(−3) at thicknesses of merely 1.5-24μm,*** ultrahigh thickness-specific SE of 25693 dB mm^(−1) and an unprecedented normalized specific SE of 428222 dB cm^(2)g^(−1) are accomplished by the freestanding SwCNT films,significantly surpassing previously reported shielding *** addition to an EMI SE greater than 54 dB in an ultra-broadband frequency range of around 400 GHz,the films demonstrate excellent EMI shielding stability and reliability when subjected to mechanical deformation,chemical(acid/alkali/organic solvent)corrosion,and high-/low-temperature *** novel printed SwCNT films offer significant potential for practical applications in the aerospace,defense,precision components,and smart wearable electronics industries.

关键词： Aligned film Single-walled carbon nanotube Lightweight flexible Thermal conductivity Electromagnetic interference shielding

SUPERPLASTICITY IN SiC_w/ZK60 COMPOSITE

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Acta Metallurgica Sinica(English Letters) 2003年第3期16卷 217-220页

作者： f.Yan K.wu M.Zhao School of Muterials Science and Engineering Harbin Institute of Technology Harbin 150001ChinaSchool of Muterials Science and EngineeringHarbin Institute of Technology Harbin 150001ChinaSchool of Muterials Science and EngineeringHarbin Institute of Technology Harbin 150001China

The superplastic deformation behavior of SiCw/ZK60 composite was investigated at temperatures ranging from 573K to 723K and at initial strain rates ranging from 8.3x10-4s-1 to 8.3x10-2s-1. A maximum elongation of 200% with a m-value of 0.35 was obtained at 613K and a initial strain rate of 1.67x 10-2s-1. The apparent activation energy (98kJ/mol) approximates that for grain boundary diffusion (92kJ/mol) in magnesium. It is proposed that the dominant mechanism of superplastic deformation in the present composite is grain boundary sliding accommodated by diffusional transport, besides, interfacial sliding plays an important role in the superplastic deformation.

关键词： magnesium matrix composite superplasticity apparent activation energy

Accurate nanoelectrode recording of human pluripotent stem cell-derived cardiomyocytes for assaying drugs and modeling disease

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Microsystems & Nanoengineering 2017年第1期3卷 382-388页

作者： Ziliang Carter Lin Allister f.McGuire Paul w.Burridge Elena Matsa Hsin-Ya Lou Joseph C.wu Bianxiao Cui Department of Applied Physics Stanford UniversityStanfordCA 94305USA Department of Chemistry Stanford UniversityStanfordCA 94305USA Stanford Cardiovascular Institute Stanford UniversityStanfordCA 94305USA Department of Pharmacology and Center for Pharmacogenomics Northwestern UniversityChicagoIL 60611USA

The measurement of the electrophysiology of human pluripotent stem cell-derived cardiomyocytes is critical for their biomedical applications,from disease modeling to drug ***,a method that enables the high-throughput intracellular electrophysiology measurement of single cardiomyocytes in adherent culture is not *** address this area,we have fabricated vertical nanopillar electrodes that can record intracellular action potentials from up to 60 single beating *** access is achieved by highly localized electroporation,which allows for low impedance electrical access to the intracellular ***,we demonstrate that this method provides the accurate measurement of the shape and duration of intracellular action potentials,validated by patch clamp,and can facilitate cellular drug screening and disease modeling using human pluripotent stem *** study validates the use of nanopillar electrodes for myriad further applications of human pluripotent stem cell-derived cardiomyocytes such as cardiomyocyte maturation monitoring and electrophysiology-contractile force correlation.

关键词： cardiomyocytes drug screening electrophysiology human pluripotent stem cells multielectrode array

Effect of perforation on flow past a conic cylinder at Re=100:vortex-shedding pattern and force history

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Acta Mechanica Sinica 2018年第2期34卷 238-256页

作者： L.M.Lin X.f.Zhong Y.X.wu Key Laboratory for Mechanics in fluid Solid Coupling Systems Institute of Mechanics Chinese Academy of Sciences

The flow past a circular-section cylinder with a conic shroud perforated with four holes at the peak was simulated numerically at Re = 100, considering two factors, *** angle of attack and the diameter of the holes. The effects of the perforated conic shroud on the vortex shedding pattern in the near wake was mainly investigated, as well as the time history of the drag and lift forces. In the investigated parameter space, three flow regimes were generally identified, corresponding to weak, moderate, and strong disturbance *** regime I, the wake can mainly be described by alternately shedding Kármán or Kármán-like vortices. In regime II, the spanwise vortices are obviously disturbed along the span due to the appearance of additional vorticity components and their interactions with the spanwise vortices, but still shed in synchronization along the spanwise direction. In regime III,the typical Kármán vortices partially or totally disappear,and some new vortex shedding patterns appear, such as-type, obliquely shedding, and crossed spanwise vortices with opposite sign. Corresponding to these complex vortex shedding patterns in the near wake, the fluid forces no longer oscillate regularly at a single vortex shedding frequency, but rather with a lower modulation frequency and multiple amplitudes. An overview of these flow regimes is presented.

关键词： Vortex shedding pattern fluid forces flow control Conical shroud Perforation

Effect of perforation on flow past a conic cylinder at Re =100: wavy vortex and sign laws

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Acta Mechanica Sinica 2018年第5期34卷 812-829页

作者： L.M.Lin X.f.Zhong Y.X.wu Key Laboratory for Mechanics in fluid Solid Coupling Systems Institute of MechanicsChinese Academy of SciencesBeijing 100190China School of Engineering Sciences University of Chinese Academy of SciencesBeijing 100049China

In order to find the intrinsic physical mechanism of the original Kármán vortex wavily distorted across the span due to the introduction of three-dimensional (3-D) geometric disturbances,a flow past a peak-perforated conic shroud is numerically simulated at a Reynolds number of *** on previous work by Meiburg and Lasheras (1988),the streamwise and vertical interactions with spanwise vortices are introduced and *** vortex-shedding patterns in the near wake for different flow regimes are reinspected and illustrated from the view of these two ***,in regime Ⅰ,spanwise vortices are a little distorted due to the weak *** in regime Ⅱ,spanwise vortices,even though curved obviously,are still shed synchronously with moderate streamwise and vertical *** in regime Ⅲ,violently wavy spanwise vortices in some vortex-shedding patterns,typically an Ω-type vortex,are mainly attributed to the strong vertical interactions,while other cases,such as multiple vortex-shedding patterns in sub-regime Ⅲ-D,are resulted from complex streamwise and vertical interactions.A special phenomenon,spacial distribution of streamwise and vertical components of vorticity with specific signs in the near wake,is analyzed based on two models of streamwise and vertical vortices in explaining physical reasons of top and bottom shear layers wavily varied across the *** these two models and above two interactions are *** two sign laws are summarized:the first sign law.f.r streamwise and vertical components of vorticity is positive in the upper shear layer,but negative in the lower shear layer,while the second sign law.f.r three vorticity components is always negative in the wake.

关键词： Vortex-shedding pattern flow control Vortex dynamics Conic disturbance Perforation Sign law

Quantitative phase imaging through an ultra-thin lensless fiber endoscope

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Light(Science & Applications) 2022年第8期11卷 1843-1852页

作者： Jiawei Sun Jiachen wu Song wu Ruchi Goswami Salvatore Girardo Liangcai Cao Jochen Guck Nektarios Koukourakis Juergen w.Czarske Laboratory of Measurement and Sensor System Technique(MST) TU DresdenHelmholtzstrasse 1801069DresdenGermany Competence Center for Biomedical Computational Laser Systems(BIOLAS) TU DresdenDresdenGermany State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision InstrumentsTsinghua University100084BeijingChina Institute for Integrative Nanosciences IFW DresdenHelmholtzstraße 2001069DresdenGermany Max Planck Institute for the Science of Light&Max-Planck-Zentrum für Physik und Medizin 91058ErlangenGermany Cluster of Excellence Physics of Life TU DresdenDresdenGermany Institute of Applied Physics TU DresdenDresdenGermany

Quantitative phase imaging(QPI)is a label-free technique providing both morphology and quantitative biophysical information in ***,applying such a powerful technique to in vivo pathological diagnosis remains ***-core fiber bundles(MCfs)enable ultra-thin probes for in vivo imaging,but current MCf imaging techniques are limited to amplitude imaging *** demonstrate a computational lensless microendoscope that uses an ultra-thin bare MCf to perform quantitative phase imaging with microscale lateral resolution and nanoscale axial sensitivity of the optical path *** incident complex light field at the measurement side is precisely reconstructed from the far-field speckle pattern at the detection side,enabling digital refocusing in a multi-layer sample without any mechanical *** accuracy of the quantitative phase reconstruction is validated by imaging the phase target and hydrogel beads through the *** the proposed imaging modality,three-dimensional imaging of human cancer cells is achieved through the ultra-thin fiber endoscope,promising widespread clinical applications.

关键词： fiber phase thin

Influences of Temperature and Solvent Ions in Solution on States and Properties of Deoxyribonucleic Acid （DNA）

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Communications in Theoretical Physics 2005年第6期43卷 1141-1152页

作者： PANGXiao-feng fENGYuan-Ying ZHANGHuai-wu A.f.Jalbout DONGRui-Xin InstituteofLifeScienceandTechnology UniversityofElectronicScienceandTechnologyofChinaChengdu610054China／／DepartmentofPhysicsNationalUniversityofSingaporeSingapore119260 DepartmentofPhysics NationalUniversityofSingaporeSingapore119260 CollegeofSolid-StateElectronics UniversityofElectronicScienceandTechnologyofChinaChengdu610054China DepartmentofPhysics DillardUniversityNewOrleansLA70112USA InstituteofLifeScienceandTechnology UniversityofElectronicScienceandTechnologyofChinaChengdu610054China

we here study the influences of the temperature and solvent ions in solution on the states and properties of DNA by a new dynamical model. This model admits three degrees of freedom per base-pair: two displacement variables related to the vibrations of the hydrogen atom in the hydrogen bonds and base (nucleotide), respectively, and an angular variable related to the rotation of each base, which delineate different forms of motion of the hydrogen atom and bases and the relations among them. In this -model we stress specially the important role of the hydrogen atom in the hydrogen bonds of the bases in the dynamics of DNA. According to their properties of motion we give the Hamiltonian of the system and the corresponding equations of motion, and End out their soliton solutions. The solitons formed by the displacements of the hydrogen atoms and bases and their rotations are the excitation states arising from the energy absorbed by the DNA working at the biological temperature. we give further the free energy of the thermal excitation state in DNA system by transfer integral way and End out the corresponding specific heat. The specific heat increases with the increasing of the temperature and concentration of the solvent ions in the solution, but is not linear changes in the region of high temperature. If compared with experimental data, they are approximately consistent. Meanwhile we End that the solvent ion conceptration influences seriously on the stability, states, and configurations of DNA.

关键词： dynamical property DNA nonlinearity soliton solvent ion specific heat