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Asymptotics for Certain Harmonic functions and the Martin Compactification on the Quaternionic Heisenberg Group

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Acta Mathematica Sinica,English Series 2005年第6期21卷 1295-1308页

作者： Jing wen LUAN fu Liu ZHU School of Mathematics and Statistics Wuhan University Wuhan 430072 P. R. of China

In this paper, we make the asymptotic estimates of the heat kernel for the quaternionic Heisenberg group in various cases. We also use these results to deduce the asymptotic estimates of certain harmonic functions on the quaternionic Heisenberg group. Moreover a Martin compactification of the quaternionic Heisenberg group is constructed, and we prove that the Martin boundary of this group is homeomorphic to the unit ball in the quaternionic field.

关键词： Quaternionic Heisenberg group Asymptotic estimate Heat kernel Martin boundary

Fabrication of Fe_2O_3@polypyrrole Nanotubes and the Catalytic Properties Under the Ultrasound

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Journal of Wuhan University of Technology(Materials Science) 2013年第5期28卷 990-996页

作者：陈春年 fu wen ZHOU Qian Anhui Key Laboratory of Controllable Chemistry Reaction & Material Chemical Engineering Hefei University of Technology Department of Applied Chemistry Hefei University of Technology

Fe2O3@polypyrrole nanotubes （Fe2O3@PPy nanotubes） have been successfully prepared by in-situ polymerization of the pyrrole on the surface of Fe2O3 nanotubes （Fe2O3-NTs）, via using L-Lysine as modified surfactant. Hollow PPy nanotubes were also produced by dissolution of the Fe2O3 core from the core/shell composite nanotubes with 1 mol,L-1 HC1. Scanning electron microscopy（SEM）, transmission electron microscope （TEM）, selective-area electron diffraction （SAED）, X-ray powder diffraction （XRD）, X-ray photoelectron spectroscopy （XPS） and Fourier transform infrared spectroscopy（FT-IR） confirmed the formation of Fe2O3-NTs and Fe2O3@PPy core/shell nanotubes. Its catalytic properties were investigated under the ultrasound. The results of UV-vis spectroscopy （UV） demonstrated Rhodamine B （RhB） can be efficiently degraded by Fe2O3 @PPy nanotubes.

关键词： Fe2O3 nanotubes composites polypyrrole polymerisation catalysis rhodamine B

Effects of Dietary Lysine on Growth Performance, Serum Concentrations of Insulin-Like Growth Factor-I (IGF-I) and IGF-I mRNA Expression in Growing Rabbits

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Agricultural Sciences in China 2010年第6期9卷 887-895页

作者： JING wen-qian LI fu-chang College of Animal Science and Technology Shandong Agricultural University Tai＇an 271018 P.R.China College of Life Science Linyi Normal University Linyi 276005 P.R.China

The effects of dietary lysine on production performance,serum concentrations of metabolites,growth hormone （GH）,insulin-like growth factor-I （IGF-I） and IGF-I mRNA expression in growing rabbits were *** hundred weaned New Zealand rabbits were allocated to individual cages and randomly offered a diet containing 5.5 （L1）,6.5 （L2）,7.5 （L3）,8.5 （L4）,or 9.5 g （L5） lysine per kg *** results showed that the average daily gain （ADG） of the rabbits from L3,L4 or L5 was higher than those from L1 or L2 （P 〈 0.05）.The feed gain ratio （F/G） in the rabbits from L4 or L5 was lower than those from L1 or L2 （P 〈 0.05）.Dietary lysine did not affect serum concentrations of total protein （TP）,glucose,insulin （INS）,and growth hormone （GH）（P 〉 0.05）.The quadratic effects of lysine on the serum urea nitrogen （SUN） concentration was detected （P = 0.035）.Serum IGF-I concentrations had a trend to increase quadratically with the increasing dietary lysine （P = 0.07）.A significant correlation was found between serum IGF-I concentrations （x,ng mL-1） and ADG （y,g kg-1）： y = -0.017x2 ＋ 1.984x ＋ 20.87 （R2 = 0.8982,P = 0.003）.The relative abundance of hepatic and muscular IGF-I mRNA tended to increase with increasing dietary lysine levels （P = 0.053 and 0.082,respectively）.Providing the diets mainly consisted of corn,wheat bran and peanut vine,the most appropriate dietary lysine level for growing meat rabbits from weaning to 70 d old was found to be 8.5 g kg-1,and IGF-I may be an important factor controlling growth of weaned rabbits.

关键词： New Zealand rabbit lysine growth performance IGF-I mRNA expression

Can the bump in the composite spectrum of GRB 910503 be an emission line feature of gamma-ray bursts?

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Chinese Journal of Astronomy and Astrophysics 2005年第6期5卷 627-635页

作者： Yi-Ping Qin fu-wen Zhang National Astronomical Observatories Yunnan Observatory Chinese Academ）： of SciencesKunming 650011 Physics Department Guangxi University Nanning 530004 Graduate University of Chinese Academy of Sciences Beijing 100049

Appearing in the composite spectral data of BATSE, EGRET and COMPTEL for GRB 910503, there is a bump at around 1600keV. We perform a statistical analysis on the spectral data, trying to find out if the bump could be accounted for by a blue-shifted and significantly broadened rest frame line due to the Doppler effect of an expanding fireball surface. We made an F-test and adopted previously proposed criteria. The study reveals that the criteria are well satisfied and the feature can be interpreted as the blue shifted 6.4 keV line. From the fit with this line taken into account, we find the Lorentz factor of this source to be F = 116-9^＋9 （at the 68% confident level, △X^2 = 1） and the rest frame spectral peak energy to be E0,p=2.96-0.18^＋0.24 ke *** the existence of the emission line feature requires other independent tests to confirm, the analysis suggests that it is feasible to detect emission line features in the high energy range of GRB spectra when taking into account the Doppler effect of fireball expansion.

关键词： gamma-rays bursts - gamma-rays theory - radiation mechanisms nonthermal - relativity

Arc-Discharge Synthesis and Microstructure Characterization of AIN Nanowires

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Journal of Materials Science & Technology 2006年第1期22卷 113-116页

作者： Zhijie LI Zhiqi shen fu WANG Lianlong HE shenyang National Laboratory of Materials Science Institute of Metal Research Chinese Academy of SciencesShenyang 110016 China Laboratory of Ultra-fine Particle Shenyang University of Technology Shenyang 110023 China School of Materials and Metallurgy Northeastern University Shenyang 110004 China

AIN nanowires with a hexagonal structure were synthesized using an improved arc-discharge method and their microstructures were characterized using a high-resolution transmission electron microscope. The synthesized AIN nanowires were of various shapes. Their diameters ranged from 20 to 110 nm and the lengths were up to 20 μm. Most of the AIN nanowires were coated by an amorphous layer of aluminum oxide. Fabrication yield was about several grams. The growth mechanism was considered to be a vapor-liquid-solid process and an AI droplet formed on the top of as-grown AIN nanowire played a role of catalyst.

关键词： Arc-discharge Nanowire High-resolution transmission electron microscope(HRTEM)

Distributed optimal energy consumption control of HEVs under MFG-based speed consensus

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Control Theory and Technology 2020年第2期18卷 193-203页

作者： Qiaobin fu fuguo XU Tielong shen Kenichi TAKAI Department of Engineering and Applied Sciences Sophia UniversityChiyuda-ku Tokyo 102-8554Japan

This paper investigates a distributed optimal energy consumption control strategy under mean-field game based speed *** scale vehicles in a traffic flow is targeted instead of individual vehicles,and it is assumed that the propulsion power of vehicles is hybrid electric *** control scheme is designed in the following two *** the first stage,in order to achieve speed consensus,the acceleration control law is designed by applying the MFG(mean-field game)*** the second stage,optimal powertrain control for minimizing energy consumption is obtained through coordinate the engine and the motor under the acceleration *** simulation is conducted to demonstrate the effectiveness of the proposed control strategy.

关键词： Mean-field games(MFGs) speed consensus powertrain control hybrid electric vehicles(HEVs)

Mock X-Ray Observations of Hot Gas with L-Galaxies Semi-analytic Models of Galaxy Formation

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Research in Astronomy and Astrophysics 2023年第7期23卷 37-51页

作者： wenxin Zhong Jian fu Shiyin shen Feng Yuan Key Laboratory for Research in Galaxies and Cosmology Shanghai Astronomical ObservatoryCASShanghai 200030China University of Chinese Academy of Sciences Beijing 100049China Key Lab for Astrophysics Shanghai 200034China

We create mock X-ray observations of hot gas in galaxy clusters with a new extension of the L-Galaxies semianalytic model of galaxy formation,which includes the radial distribution of hot gas in each *** on the model outputs,we first build some mock light cones,then generate mock spectra with the SOXS package and derive the mock images in the light *** the mock data,we simulate mock X-ray spectra for the ROSAT all-sky survey,and compare the mock spectra with the observational ***,we consider the design parameters of the HUBS mission and simulate the observation of the halo hot gas for HUBS as an important application of our mock *** find:(1)our mock data match the observations by current X-ray telescopes.(2)The survey of hot baryons in resolved clusters by HUBS is effective below redshift 0.5,and the observations of the emission lines in point-like sources at z>0.5 by HUBS help us understand the hot baryons in the early universe.(3)By taking advantage of the large simulation box and flexibility in semi-analytic models,our mock X-ray observations provide the opportunity to select targets and observation strategies for forthcoming X-ray facilities.

关键词： X-rays:galaxies:clusters galaxies:clusters:intracluster medium galaxies:groups:general galaxies:halos (galaxies:)intergalactic medium

Does consciousness overflow cognitive access?Novel insights from the new phenomenon of attribute amnesia

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Science China(Life Sciences) 2021年第6期64卷 847-860页

作者： Yingtao fu wenchen Yan Mowei shen Hui Chen Department of Psychology and Behavioral Sciences Zhejiang UniversityHangzhou 310007China

The moment we open our eyes,we experience a rich and detailed visual world,but the amount of information available to report is rather *** dissociation relates to a major debate regarding the nature of visual *** overflow argument suggests that our conscious experience is quite rich and far beyond what can be reported,standing in sharp contrast to the nooverflow argument that visual consciousness is severely impoverished and limited to what can be *** this paper,we systematically reviewed existing evidence in favor of the overflow argument,including studies of several variations of the iconic memory paradigm and the divided attention paradigm,as well as studies of neural correlates of ***,we expounded some critical objections and alternative interpretations to such evidence,as well as some opposing ***,we introduced a series of our recent studies based on a striking phenomenon of attribute amnesia,which we believe could provide new insight into the overflow view of visual consciousness.

关键词： phenomenal/access consciousness attribute amnesia attention working memory

Flag-hinge-like highly luminescent chiral nanographenes with twist geometry

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Chinese Chemical Letters 2024年第11期35卷 334-339页

作者： wenying Cui Zhetong Jin wentao fu Chengshuo shen School of Chemistry and Chemical Engineering Zhejiang Sci-Tech UniversityHangzhou 310000China

Nanographenes(NGs)with twisted backbones are emerging as new candidates for chiroptical *** this work,we describe a new strategy for synthesizing a[10]twistacene-embedded NG which exhibits a rare flag-hinge-like *** neatly creating steric crowding on the[6]helicene breaches of the NG skeleton,the synthesis only provided homochiral isomers without generating the“meso-”*** formed NGs showed high luminescence with quantum yield up to 52%,and promising circularly polarized luminescence(CPL)performance with|glum|up to 5.0×10^(-3).Besides,these NGs also showed outstanding CPL brightness(BCPL)up to 305 L mol^(-1)cm^(-1)among chiral NGs.

关键词： Nanographene Twistacene Helicenes Chirality Circularly polarized luminescence