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Photonics Research 2019年第11期7卷 1249-1257页

作者： CARLOS DO?ATE-BUENDíA MERCEDES FERNáNDEZ-ALONSO JESúS LANCIS GLADYS MíNGUEZ-VEGA groc·uji Institute of New Imaging Technologies Universitat Jaume I

There exists an increasing demand of industrial-scale production of high-purity ligand-free nanoparticles due to the continuous development of biomedicine, catalysis, and energy applications. In this contribution, a simultaneous spatial and temporal focusing(SSTF) setup is first proposed for increasing nanoparticle productivity of the eco-friendly pulsed laser ablation in liquids(PLAL) technique. In spite of the fact that femtosecond pulses have proved to achieve higher ablation rates in air than picosecond pulses, in PLAL this is reversed due to the nonlinear energy losses in the liquid. However, thanks to the incorporation of SSTF, the energy delivered to the target is increased up to 70%, which leads to a nanoparticle production increase of a 2.4 factor. This breaks a barrier toward the employment of femtosecond lasers in high-efficiency PLAL.

关键词： barrier simultaneous liquids

Time-expanded phase-sensitive optical time-domain reflectometry

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Light(Science & Applications) 2021年第3期10卷 443-454页

作者： Miguel Soriano-Amat Hugo F.Martins Vicente Duran Luis Costa Sonia Martin-Lopez Miguel Gonzalez-Herraez Maria R.Fernandez-Ruiz Departamento de Electronica Universidad de AlcalaEscuela Politecnica Superior28805 MadridSpain Instituto deóptica"Daza de Valdes" IO-CSICC/Serrano 12128006 MadridSpain groc-uji Institute of New Imaging TechnologiesUniversity Jaume112071 CastellonSpain

Phase-sensitive optical time-domain reflectometry(CDOTDR)is a well-established technique that provides spatiotemporal measurements of an environmental variable in real *** unique capability is being leveraged in an everincreasing number of applications,from energy transportation or civil security to *** date,a wide number of different approaches have been implemented,providing a plethora of options in terms of performance(resolution,acquisition bandwidth,sensitivity or range).However,to achieve high spatial resolutions,detection bandwidths in the GHz range are typically required,substantially increasing the system cost and ***,we present a novel OOTDR approach that allows a customized time expansion of the received optical ***,the presented technique reaches cm-scale spatial resolutions over t km while requiring a remarkably low detection bandwidth in the MHz *** approach relies on the use of dual-comb spectrometry to interrogate the fibre and sample the backscattered *** phase-spectral coding is applied to the employed combs to maximize the signal-to-noise ratio of the sensing scheme.A comparison of the proposed method with alternative approaches aimed at similar operation features is provided,along with a thorough analysis of the new *** results demonstrate a radically novel high-resolution OOTDR scheme,which could promote new applications in metrology,borehole monitoring or aerospace.

关键词： optical phase expanded

Plasma Confinement Characteristics in Heliotron J——Spontaneous Change of Plasma Confinement State

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Plasma Science and Technology 2004年第4期6卷 2371-2376页

作者： T.Mizuuchi H.Okada K.Nagasaki S.Kobayashi S.Yamamoto F.Sano K.Kondo K.Hanatani M.Nakasuga Y.Nakamura Y.Suzuki Y.Manabe H.Shidara H.Kawazome M.Kaneko Y.Nishioka Y.Ohno T.Takamiya H.Yukimoto Y.Fukagawa Y.Morita S.Nakazawa S.Nishio K.Takahashi S.Tuboi M.Yamada K.Ohashi Y.Ijiri T.Senju K.Yaguchi K.Sakamoto K.Tohshi M.Shibano T.Obiki Institute of Advanced Energy Kyoto UniversityUji 611-0011Japan Graduate School of Energy Science Kyoto UniversityUji 611-0011Japan

Spontaneous transition of the plasma confinement mode was observed in thehelical-axis heliotron device 'Heliotron J' for three different plasma heating schemes, ***-only, NBI-only and the combination of ECH and NBI. The transition seems to occur above a certaincritical density. In addition to the confinement transition, a spontaneous shift of the hittingposition of the divertor plasma flux on the wall was observed. This shift could be related with thechange of the edge field topology caused by non-inductive toroidal currents.

关键词： heliotron J plasma confinement transition phenomena

CONTROLLED SYNTHESIS OF AMPHIPHILIC BLOCK POLYMERS HAVING GLUCOSE RESIDUES AND THEIR STRUCTURE FORMATION

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Chinese Journal of Polymer Science 1999年第1期17卷 21-26页

作者： Takeaki Miyamoto Masahiko Minoda Yoshinobu Tsujii Institute for Chemical Research Kyoto University Uji Kyoto 611 JapanInstitute for Chemical Research Kyoto University Uji Kyoto 611 JapanInstitute for Chemical Research Kyoto University Uji Kyoto 611 Japan

Vinyl ether (VE)-based amphiphilic block copolymers with D-glucose residues as hydrophilicpendants were synthesized by CH_3 CH(OiBu)Cl/ZnI_2-initiated sequential living cationic copolymerization of3-O-(vinyloxy)ethyl-1, 2:5, 6-di-O-isopropylidene-D-glucofuranose (IGVE) and isobutyl VE (IBVE ) andsubsequent deprotection. The precursor block copolymers had a narrow molecular weight distribution(M_w/M_n～1.1) and a controlled segmental composition. The solubility characteristics of the amphiphiliccopolymer depended strongly on composition. Their solvent-cast thin films were examined, under atransmission electron microscope, and could be seen to exhibit various microphase-separated surfacemorphologies such as spheres, cylinders, and lamellae, depending on composition. The amphiphiliccopolymers with the appropriate segmental composition were found to form a stable monolayer at the air-water interface, which was successfully transferred onto a substrate by the Langmuir-Blodgett (LB)technique. The layered strucfure of the built-up LB films was controlled by blending the homopolymer.

关键词： Glucose-substituted amphiphilic block polymer Controlled structure

Photophysics of halide perovskite nanocrystal quantum dots

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Nano Research 2024年第12期17卷 10536-10542页

作者： Yoshihiko Kanemitsu Institute for Chemical Research Kyoto UniversityUjiKyoto 611-0011Japan

Here I provide a summary of my group’s research on the photophysics of nanocrystal quantum dots and briefly discuss multipeak luminescence structures related to excitons,trions,and biexcitons in halide perovskite nan... 详细信息

关键词： quantum dot nanocrystals halide perovskite exciton trions biexciton

A REMARK ON THE HENSELIZATION OF A REGULAR LOCAL RING

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Chinese Annals of Mathematics,Series B 1999年第1期20卷 63-64页

作者： C. GALINDO(Department of Mathematics(ESTCE)),uji,Campus P.Roja,12071,Castellon ,Spain.E-mail:galindo@mail.uji.es uji Dept Math ESTCE Castellon 12071 Spain

The author gives simple characterization of the Henselization of an excellent regular localring.

关键词： Regular local ring Local Henselian ring Characterization

Structured Learning in Biological Domain

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Journal of Systems Science and Systems Engineering 2020年第4期29卷 440-453页

作者： Canh Hao Nguyen Bioinformatics Center Instute for Chemical ResearchKyoto UniversityUjiKyotoJapan

Biological domain has been blessed with more and more data from biotechnologies as well as data integration *** the renaissance of machine learning and artificial intelligence,there is so much promise of data-driven biological knowledge ***,it is not straight forward due to the complexity of the domain knowledge hidden in the *** any level,be it atoms,molecules,cells or organisms,there are rich interdependencies among biological *** learning approaches in this domain usually involves analyzing interdependency structures encoded in graphs and related *** this report,we review our work in developing new Machine Learning methods for these applications with improved performances in comparison with state-of-the-art *** show how the networks among biological components can be used to predict properties.

关键词： Structured learning sparse modeling systems biology deep learning

Ultrathin Acoustic Parity-Time Symmetric Metasurface Cloak

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Research 2019年第1期2019卷 671-677页

作者： Hao-xiang Li Mar-a Rosendo-López Yi-fan Zhu Xu-dong Fan Daniel Torrent Bin Liang Jian-chun Cheng Johan Christensen Key Laboratory of Modern Acoustics MOEInstitute of AcousticsDepartment of PhysicsCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China Department of Physics Universidad Carlos III de Madrid28916 LeganesMadridSpain groc UJIInstitut de Noves Tecnologies de la Imatge(INIT)Universitat Jaume I12080 Castell`eSpain

Invisibility or unhearability cloaks have been made possible by using metamaterials enabling light or sound to fow around obstacle without the trace of refections or *** are known for being fexible building units that can mimic a host of unusual and extreme material responses,which are essential when engineering artifcial material properties to realize a coordinate transforming *** and stretching the coordinate grid in space require stringent material parameters;therefore,small inaccuracies and inevitable material losses become sources for unwanted scattering that are decremental to the desired *** obstacles further limit the possibility of achieving a robust concealment of sizeable objects from either radar or sonar *** using an elaborate arrangement of gain and lossy acoustic media respecting parity-time symmetry,we built a one-way unhearability cloak able to hide objects seven times larger than the acoustic *** speaking,our approach has no limits in terms of working frequency,shape,or size,specifcally though we demonstrate how,in principle,an object of the size of a human can be hidden from audible sound.

关键词： coordinate stretching arrangement

Recent Progresses and Critical Issues of SiC_f/SiC Composite Under Irradiation Environments

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Plasma Science and Technology 2003年第5期5卷 1965-1976页

作者：沙建军 A.Kohyama Y.Katoh Graduate School of Energy Science Kyoto UniversityGokashoUjiKyoto 611-0011Japan Institute of Advanced Energy Kyoto UniversityGokashoUjiKyoto 611-0011 Japan

SiC with fiber-reinforced composites, which are presently considered as the primary structural materials in some fusion reactor conceptual designs, are more attractive and competitive for structural materials in a fusion energy system because of its excellent chemical and mechanical properties such as high fracture toughness, induced-low activation, afterheat under 14MeV neutron irradiation environment at elevated temperature, and good compatibility with coolant and breeder materials. Thus it is important to investigate the research progress of advanced SiC composite, including transmuted helium gas, radiation swelling, radiation effects on mechanical properties, irradiation-enhanced creep, fatigue, physical properties associated with fusion design and their critical issues. This report summarized these results and addressed the major critical issues under irradiation conditions.

关键词： SiCf/SiC composite irradiation environments

Wave-Number Spectral Characteristics of Drift Wave Micro-Turbulence with Large-Scale Structures

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Plasma Science and Technology 2011年第3期13卷 297-301页

作者：李继全 Y.KISHIMOTO Graduate School of Energy Science Kyoto University 611-0011 Gokasho Uji Japan

Wave-number spectral characteristics of drift wave micro-turbulence with large-scale structures （LSSs） including zonal flows （ZFs） and Kelvin-Holmheltz （KH） mode are investigated based on three dimensional gyrofluid simulations in a slab geometry. The focus is on the property of the wave-number spectral scaling law of the ambient turbulence under the back reaction of the self-generated LSSs. A comparison of the spectral scaling laws between ion/electron temperature gradient （ITG/ETG） driven turbulences is presented. It is shown that the spectral scaling of the ITG turbulence with robust ZFs is fitted well by an exponential-law function （Φ^2/2）E∝e^-λkx in kx and a power-law one in （Φ^2/2）p∝ky^-β in ky. However, the ETG turbulence is characterized by a mixing Kolmogorov-like power-law and exponential-law （Φ^2/2）E∝e-λkx＇yk^-3x,y/（1 ＋ k^2x,y）^2 scaling for both kx and ky spectra due to the ZFs and KH mode dynamics, with λ and β the slope index factors. The underlying physical mechanism is understood as the spectral scattering caused by the back-reaction of the LSSs on the ambient turbulence. These findings may provide helpful guideline to diagnose the plasma fluctuations and flow structures in experiments.

关键词： spectral scaling law zonal flows micro-turbulence gyrofluid simulation