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Chinese Physics B 2010年第2期19卷 43-47页

作者： y Chargui l Chetouani A Trabelsi Unit de Recherche de Physique Nuclaire et des Hautes Energies Facult des Sciences de Tunis Dpartement de Physique Thorique Institut de PhysiqueUniversit de ConstantineRoute Ain El BeyConstantineAlgeria Centre National des Sciences et Technologies Nuclaires Technopole de Sidi-Thabet 2020Tunisia

Using the momentum space representation, we solve the Klein--Gordon equation in one spatial dimension for the case of mixed scalar and vector linear potentials in the context of deformed quantum mechanics characterized by a finite minimal uncertainty in position. The expressions of bound state energies and the associated wave functions are exactly obtained.

关键词： Klein--Gordon equation linear potential minimal length exact solution

Biomass-derived carbon doping to enhance the current carrying capacity and flux pinning of an isotopic Mg^(11)B_(2)superconductor

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Journal of Magnesium and Alloys 2022年第7期10卷 1868-1877页

作者： M.Shahbazi y.hao D.Patel H.liang y.yamauchi M.S.A.Hossain QUT Centre for Materials Science and School of Chemistry and Physics Queensland University of Technology(QUT)BrisbaneQLD 4001Australia School of Mechanical and Mining Engineering Faculty of EngineeringArchitecture and Information Technology(EAIT)The University of QueenslandBrisbaneQLD 4072Australia Australian Institute for Bioengineering and Nanotechnology(AIBN) The University of QueenslandBrisbaneQLD 4072Australia JST-ERATO yamauchi Materials Space-Tectonics Project and International Center for Materials Nanoarchitectonics(WPI-MANA) National Institute for Materials Science(NIMS)1-1 NamikiTsukubaIbaraki 305-0044Japan

low activation isotopic boron(11B)based magnesium diboride(Mg^(11)B_(2))superconductors doped with biomass-derived activated carbon were synthesized using11B and magnesium powder via solid-state *** effect of carbon doping on the lattice structure and superconducting properties of Mg^(11)B_(2)bulks were evaluated using X-ray powder diffraction,high resolution transmission electron microscopy,scanning electron microscopy and magnetization *** refinement of structural parameters indicates successful substitution of carbon in Mg^(11)B_(2)*** critical current density(Jc)of carbon doped Mg^(11)B_(2)synthesized at 650℃was enhanced more than two times compared with the pure Mg^(11)B_(2)*** improvement was observed for the Mg^(11)B_(2)bulks heat-treated at 800℃.This enhancement is due to successful substitution of biomass-derived carbon with high surface area into Mg^(11)B_(2)*** flux pinning mechanism of pure and doped Mg^(11)B_(2)bulks were investigated using the Dew-Hughes *** study provides information regarding enhancement of the Jc of low activation Mg^(11)B_(2)superconductors suitable for next-generation fusion magnets.

关键词： Magnesium diboride Critical current Flux pinning mechanism Fusion reactor applications

A general powder dusting method for latent fingerprint development based on AIEgens

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Science China Chemistry 2018年第8期61卷 966-970页

作者： Zijie Qiu Bin hao Xinggui Gu Zhaoyu Wang Ni Xie Jacky W.y.lam Hongxia hao Ben Zhong Tang Key laboratory of Evidence Science (China University of Political Science and law) Ministry of Education Beijing 100088 China Collaborative Innovation Center of Judicial Civilization China Department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction Division of Life Science State Key Laboratory of Molecular Neuroscienee Institute for Advanced Study Institute of Molecular Functional Materials Division of Biomedical Engineering the Hong Kong University of Science and Technology Clear Water Bay Kowloon China NSFC Center for luminescence from Molecular Aggregates SCUT-HKUST Joint Research Institute State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou 510640 China

Powder dusting method is the most practically useful approach for latent fingerprint development in the crime scene. Herein, a general powder dusting method has been explored for latent fingerprint development based on aggregation-induced emission luminogens(AIEgens). A series of tetraphenylethene(TPE) derivatives with multiple diphenylamine(DPA), namely, TPE-DPA,TPE-2 DPA and TPE-4 DPA, were selected as candidates to dope with magnetic powders and applied for latent fingerprint development. After screening, the magnetic powder 3 doped with TPE-4 DPA proves to be the best, in terms of fluorescent intensity, resolution and adhesiveness. Afterwards, the magnetic powder 3 was applied for visualization of latent fingerprint on various smooth and porous substrates, including glass, stainless steel, leaf, ceram, plastic bag, lime wall, wood and paper *** details, such as island, core, termination and bifurcation, can be clearly observed for the fluorescent fingerprint images.

关键词： latent fingerprint development powder dusting aggregation-induced emission

Cell membrane coating for reducing nanoparticle-induced inflammatory responses to scaffold constructs

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Nano Research 2018年第10期11卷 5573-5583页

作者： Zhiyuan Fan Peter y. li Junjie Deng Stephen C. Bady hao Cheng Department of Materials Science and Engineering Drexel University Philadelphia Pennsylvania 19104 USA Engineering Research Center of Clinical Functional Materials and Diagnosis & Treatment Devices of Zhejiang Province Wenzhou Institute of Biomaterials and Engineering Chinese Academy of Sciences Wenzhou 325011 China

The controlled release of therapeutics from microparticles or nanoparticles （NPs） has been well-studied. Incorporation of these particles inside biomaterial scaffolds is promising for tissue regeneration and immune modulation. However, these particles may induce inflammatory and foreign body responses to scaffold constructs, limiting their applications. Here we show that widely used poly（lactic-co-glycolic acid） nanoparticles （PlGA NPs） formed by double emulsion dramatically increased neutrophil infiltration and pro-inflammatory cytokines in alginate scaffolds 1 day after the subcutaneous injection of the scaffolds into mice. The coating of red blood cell （RBC） membranes on PlGA NPs completely eliminated these short-term inflammatory responses. For a longer term of 10 days, neither PlGA NPs nor RBC membrane-coated NPs exerted a significant effect on the infiltration of neutrophils or macrophages in alginate scaffolds, possibly due to the degradation and/or clearance of NPs by infiltrating cells. Despite the extensive exploration of cell membrane-coated NPs, our study is the first to investigate the effects of cell membrane coating on foreign body reaction to NPs. By harnessing the natural biocompatibility of cell membranes, our strategy of anti-inflammatory protection for scaffolds may be pivotal for many applications such as those relying on the recruitment of stem cells and/or progenitor ceils to scaffolds.

关键词： regenerative medicine wound healing drug delivery endothelial cell immune tolerance

Mathematical modelling of axonal microtubule bundles under dynamic torsion

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Applied Mathematics and Mechanics(English Edition) 2018年第6期39卷 829-844页

作者： J.y.WU Hong yUAN l.y.lI MOE Key laboratory of Disaster Forecast and Control in Engineering Institute of Applied MechanicsJinan University School of Engineering University of Plymouth

Owing to its viscoelastic nature, axon exhibits a stress rate-dependent me- chanical behavior. An extended tension-shear chain model with Kelvin-Voigt viscoelas- ticity is developed to illustrate the micromechanical behavior of the axon under dynamic torsional conditions. Theoretical closed-form expressions are derived to predict the de- formation, stress transfer, and failure mechanism between microtubule （MT） and tau protein while the axon is sheared dynamically. The results obtained from the present an- alytical solutions demonstrate how the MT-tau interface length, spacing between the tau proteins, and loading rate affect the mechanical properties of axon. Moreover, it is found that the MTs are more prone to rupture due to the contributions from the viscoelastic effects. Under the torsional force, the MTs are so long that the stress concentrates at the loaded end where axonal MTs will break. This MT-tau protein dynamics model can help to understand the underlying pathology and molecular mechanisms of axonal injury. Additionally, the emphasis of this paper is on the micromechanical behavior of axon, whereas this theoretical model can be equally applicable to other soft or hard tissues, owning the similar fibrous structure.

关键词： torsion biocomposite diffuse axonal injury (DAI) Kelvin-Voigt viscoelas-tic model dynamic response tension-shear chain model

Study on denoising of continuous spectrum on-line monitoring signal of water quality with micro-reagents based on HHT

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Optoelectronics letters 2022年第2期18卷 115-121页

作者： lI Wen lÜ Binbin FU hao CAI yongqing Institute of Mechanical and Electrical Engineering North China University of TechnologyBeijing 100144China

A continuous spectrum water quality on-line monitoring signal processing method based on Hilbert-Huang transform(HHT) is proposed in this paper, which combines the micro-reagent water quality on-line monitoring technology of sequential injection. The modulation signal and spectrum curve of each intrinsic mode function(IMF) component of the original spectrum signal were obtained by empirical mode decomposition(EMD). The water sample data of different concentrations in the continuous spectrum on-line monitoring system was analyzed by the HHT model. The noise signal was excavated to realize the noise reduction processing, and the reconstruction of the continuous spectrum signal was realized after the noise reduction processing was completed. The research results show that this method can effectively reduce the noise of continuous spectrum signals according to different signal-to-noise characteristics of continuous spectrum, and has convenient use, fast processing speed, and high resolution in the time-frequency domain, which effectively improves the stability and accuracy of the micro-reagent continuous spectrum water quality on-line monitoring system.

关键词： signal spectrum continuous

Interplay of polarization,strength,and loss in dielectric films for capacitive energy storage:Current status and future directions

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Journal of Materiomics 2023年第3期9卷 516-519页

作者： hao Pan yizhe Jiang Judith l.MacManus-Driscoll Department of Materials Science and Engineering University of CaliforniaBerkeleyCA94720USA Department of Materials Science and Metallurgy University of Cambridge27 Charles Babbage RoadCambridgeCB30FSUnited Kingdom

Energy-storage dielectric capacitors have emerged as one of the key technologies for high-power systems such as green energy generation,hybrid/electrical vehicles,pulsed power devices,etc.[1]The high-power feature of dielectric capacitors originates from the fast electrostatic *** is in contrast with the slower electrochemical processes in batteries and supercapacitors.

关键词： Dielectric film Energy storage Polarization Strength loss

INTERNAl FRICTION AND ElASTIC CONSTANTS OF Pd-B-H AllOyS

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Acta Metallurgica Sinica(English letters) 1998年第1期11卷 51-55页

作者： y.l.Chen Zhejiang Univ Hangzhou China

Internal friction measurements on binary and ternary α-phase alloys of Pd with hydrogen and boron have been performed with a torsion pendulum and by observing the cttenuation of ultrasonic pulses. A pronounced damping maximum of binary Pd-B alloys at 220K and measuring frequencies of about 4Hz could not be established at a frequency of 15MH. Ternary Pd-B-H alloys show an additional damping maximum besides the hydrogen Zener effect, which is interpreted in terms of a changed jump frequency of hydrogen in the neighborhood of boron atoms.

关键词： Pd-B-H alioy,internal friction,elastic constant Zener effect

Nonreciprocal generation of Schrodinger cat state induced by topology

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Science China(Physics,Mechanics & Astronomy) 2024年第4期67卷 23-30页

作者： Zi-hao li li-li Zheng ying Wu Xin-you lü School of Physics and Institute for Quantum Science and Engineering Huazhong University of Science and Technologyand Wuhan Institute of Quantum TechnologyWuhan 430074China Key laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education Jianghan UniversityWuhan 430074China

The Schrodinger cat state produced differently in two directions is anticipated to be a critical quantum resource in quantum information *** exploring the interplay between quantum nonreciprocity and topology in a one-dimensional microcavity array,we obtain the Schrodinger cat state(a pure quantum state)in a chosen direction at the edge cavity,whereas a classical state in the other *** nonreciprocal generation of the cat state originates from the topologically protected chiralitymode excitation in the nontrivial phase,but in the trivial phase,the nonreciprocal generation of cat state ***,our proposal is switchable by tuning the parameters so that a topological phase transition ***,the obtained cat state has nonreciprocal high fidelity,nonclassicality,and quantum coherence,which are sufficient to be used in various one-way quantum technologies,e.g.,invisible quantum sensing,noise-tolerant quantum computing,and chiral quantum *** work provides a general approach to control quantum nonreciprocities with the topological effect,which substantially broadens the fields of nonreciprocal photonics and topological physics.

关键词： Schr?dinger cat state nonreciprocity topology

Influence of the velocity barrier on the massive Dirac electron transport in a monolayer MoS2 quantum structure

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Frontiers of physics 2020年第3期15卷 113-121页

作者： X.-J.hao R.-y.yuan J.-J.Jin y.Guo Center for Theoretical Physics Department of PhysicsCapital Normal UniversityBeijing100048China Department of Physics and State Key laboratory of low-Dimensional Quantum Physics Tsinghua UniversityBeijing100084China Collaborative Innovation Center of Quantum Matter BeijingChina

Using the transfer matrix method,spin-and valley-dependent electron transport properties modulated by the velocity barrier were studied in the normal/ferromagnetic/normal monolayer MoS2 quantum *** on Snell’s law in optics,we define the velocity barrier asξ=v2/v1 by changing the Fermi velocity of the intermediate ferromagnetic region to obtain a deflection condition during the electron transport process in the *** results show that both the magnitude and the direction of spin-and valley-dependent electron polarization can be regulated by the velocity barrier.−100%polarization of spin-and valley-dependent electron can be achieved forξ>1,while 100%polarization can be obtained forξlley transport always occur at a large incident *** addition,the spin-and valley-dependent electron transport considerably depends on the length kFl and the gate voltage U(x)of the intermediate ferromagnetic *** findings provide an effective method for designing novel spin and valley electronic devices.

关键词： velocity barrier monolayer MoS2 spin valley polarization