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Communications in Theoretical Physics 2008年第3期49卷 590-594页

作者： dai Fang-wen MA Lei Department of Physics East China Normal University Shanghai 200062 China

We obtain an explicit formula to calculate the entanglement entropy of bipartite entangled state of general two-mode boson exponential quadratic operator with continuous variables in Fock space. The simplicity and gen... 详细信息

关键词： entanglement entropy continuous-variable entangled states linear quantum transformation

Gauges for the Cookie-cutter Sets

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Acta Mathematica Sinica,English Series 2009年第12期25卷 2119-2126页

作者： Yu Xia dai Sheng You wen Department of Mathematics Hubei University Wuhan 430062 P. R. China

Let E be a cookie-cutter set with dimH E =s. It is known that the Hausdorff s-measure and the packing s-measure of the set E are positive and finite. In this paper, we prove that for a gauge function g the set E has positive and finite Hausdorff g-measure if and only if 0 〈 liminft→0 g（t）/ts 〈 ∞. Also, we prove that for a doubling gauge function g the set E has positive and finite packing g-measure if and only if 0 〈 lim supt→0 g（t）/ts 〈 ∞.

关键词： cookie-cutter set gauge function Hausdorff gauge packing gauge

Serum sex hormone and growth arrest-specific protein 6 levels in male patients with coronary heart disease

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Asian Journal of Andrology 2016年第4期18卷 644-649页

作者： Rui Zhao Yan Li wen dai Department of Clinical Laboratory Renmin Hospital of Wuhan University Wuhan 430060 Hubei Province China.

Epidemiological studies have shown a high prevalence of low serum testosterone levels in men with cardiovascular disease. Moreover, the tyrosine kinase receptor Axl, the ligand of which is growth arrest-specific protein 6 （GAS6）, is expressed in the vasculature, and serum GAS6 levels are associated with endothelial dysfunction and cardiovascular events. Testosterone regulates GAS6 gene transcription directly, which inhibits calcification of vascular smooth muscle cells and provides a mechanistic insight into the cardioprotective action of androgens. This study was designed to determine the correlation between serum GAS6 and testosterone levels in male patients with coronary heart disease （CHD）. We recruited 225 patients with CHD and 102 apparently healthy controls, Serum concentrations of GAS6 and soluble Axl were quantified by an enzyme-linked immunosorbent assay. Levels of high-sensitivity C-reactive protein, testosterone, estradiol, and other routine biochemical markers were also measured. Testosterone decreased from 432.69 ± 14.40 to 300.76± 6.23 ng d1-1 （P 〈 0.001） and GAS6 decreased from 16.20± 0.31 to 12.51 ± 0.19 ng ml-1 （P 〈 0.001） in patients with CHD, compared with control subjects. Multiple linear regression analysis showed that serum testosterone and GAS6 levels were positively associated in male patients with CHD. Alterations in GAS6 levels may influence the development of CHD. Downregulation of GAS6/Axl signaling in the presence of low sex hormone levels during disease progression is a potential mechanism by which GAS6 affects CHD. This study provides novel results regarding the influence of sex hormones on serum GAS6 levels in patients with CHD.

关键词： coronary heart disease growth arrest-specific protein 6 soluble Axl testosterone

Influence of particle size on combustion behavior of bamboo char used for blast furnace injection

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Journal of Iron and Steel Research International 2018年第12期25卷 1213-1222页

作者： Run-sheng Xu Wei Wang Bo-wen dai State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology Wuhan 430081HubeiChina Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081HubeiChina

The combustion behavior of bamboo char and its relationship with particle sizes were evaluated using thermo-gravimetric *** results showed that the combustion properties of bamboo char were much better than those of the anthracite used as a coal injected for blast furnace ironmaking due to its porous structure,disordered microcrystalline and higher catalytic index of ash *** the particle size increased from -0.074 to 0.500-1.000 mm,the ignition temperature and burnout temperature of bamboo char increased,while the combustible index and comprehensive combustion characteristic index decreased *** apparent activation energies of non-isothermal combustion of bamboo char and anthracite were calculated based on the distributed activation energy *** results showed that the average activation energy was 162.86 kJ/mol for-0.074 mm anthracite,while it ranged from 71.01 to 89.44 kJ/mol for bamboo chars of different *** revealed that the combustion reactivity of bamboo char in the largest size (0.500-1.000 mm)was much better than that of -0.074 mm,anthracite;thus,the size of biomass char could be enlarged to the maximum size specified by the injection application of blast furnace.

关键词： Bamboo char Blast furnace injection Particle size Combustion characteristics Kinetics

Driving factors of direct greenhouse gas emissions from China's pig industry from 1976 to 2016

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Journal of Integrative Agriculture 2021年第1期20卷 319-329页

作者： dai Xiao-wen Zhanli SUN Daniel MULLER Sichuan Center for Rural Development Research Sichuan Agricultural UniversityChengdu 611130P.R.China Leibniz Institute of Agricultural Development in Transition Economies(IAMO) Halle(Saale)06120Germany Geography Department Humboldt-Universitat zu BerlinBerlin 10099Germany Integrative Research Institute on Transformations of Human-Environment Systems(IRI THESys) Humboldt-Universitat zu BerlinBerlin 10099Germany

Livestock cultivation is a significant source of greenhouse gas(GHG) emissions, accounting for 14.5% of the total anthropogenic emissions. China is responsible for a considerable share of the global livestock emissions, particularly caused by pork production. We used the Kaya identity and the logarithmic mean Divisia index(LMDI) to decompose the national annual GHG emissions from enteric fermentation and manure management in pig farming in China from 1976 to 2016. We decomposed the sources of the emissions into five driving factors:(1) technological progress(e.g., feed improvement);(2) structural adjustment in the livestock sector;(3) structural adjustment in agriculture;(4) affluence;and(5) population growth. The results showed that the net GHG emissions from the pig sector in China increased 16 million tons(Mt) of carbon dioxide equivalents(CO2 eq) during the study period. The decomposition analysis revealed that structural adjustment in agriculture, growing affluence, and population growth contributed to an increase of the GHG emissions of pork production by 23, 41, and 13 Mt CO2 eq, respectively. The technological progress and structural changes in animal husbandry mitigated emissions by –51 and –11 Mt CO2 eq, respectively. Further technological progress in pig production and optimizing the economic structures are critical for further reducing GHG emissions in China's pig industry. Our results highlight the dominant role of technological changes for emission reductions in the pig farming.

关键词： livestock production carbon emissions manure management pig farming LMDI decomposition

Unthermal Hawking Radiation from a General Stationary Black Hole

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Communications in Theoretical Physics 2008年第2期49卷 379-381页

作者： ZHANG Yong-Ping dai Qian LIU wen-Biao Department of Physics Institute of Theoretical Physics Beijing Normal University Beijing 100875 China

Using Damour-Ruflini＇s method, Hawking radiation from a general stationary black hole is investigated again deeply. Considering the back reaction of the particle to the space-time and energy conservation, we find that the radiation is not exactly thermal and can take out information from the black hole. This can be used to explain the information loss paradox, and the result is consistent with the works finished before.

关键词： Hawking radiation stationary black hole back-reaction information loss paradox unitary theory

A Simple Approach to Control the Growth of Non-spherical Gold Nanoparticles

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Chinese Chemical Letters 2003年第11期14卷 1163-1166页

作者： Hong YUAN Ru Xiu CAI dai wen PANG College of Chemistry and Molecular Sciences Wuhan UniversityWuhan 430072

A simple method to prepare the non-spherical gold particles was developed. The result solution included trigonal, truncated trigonal, hexagonal layers, and a pseudo-pentagonal shaped gold nanocrystals. The key factor is to control the relative rates of nucleation and cluster growth in this method. These attributes make seeding growth method as a useful tool in the fabrication of colloidal metal materials. A longitudinal plasmon resonance of 866 nm was observed, which is in the near-IR spectral regions (600-1000 nm). The excellent optical properties as near-IR labels are used to develop highly sensitive analysis method.

关键词： Controlled synthesis shaped nanoparticles gold.

A MATHEMATICAL MODEL OF MIGRATION AND EXPANSION OF MEANDER LOOPS

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Journal of Hydrodynamics 2010年第2期22卷 214-220页

作者： dai wen-hong TANG Hong-wu State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering College of Water Conservancyand Hydropower Engineering Hohai University Nanjing 210098 China

This article presents a mathematical model of the plane evolution of alluvial meandering streams,through downstream migration and lateral expansion of meander *** the conditions prevailing in natural streams,the channel centerlines follow sine-generated curves,with an assumed steady-state turbulent and subcritical flow,of large width-to-depth ratio（≥ 15,for example） and small Froude number（Fr ）.The plane deformation of the channel is caused by the action on the banks of the convective vertically-averaged meandering *** growth（migration and expansion） of meander loops is attributed to the *** computational results of the model show that the obtained migration and expansion patterns of the meander loops are in good agreement with those of observations and measurements in similar meandering streams.

关键词： mathematical model downstream migration lateral expansion meander loop vertically-averaged flow bank deformation measurements

Artificially regulated synthesis of nanocrystals in live cells

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National Science Review 2022年第6期9卷 189-199页

作者： An-An Liu En-Ze Sun Zhi-Gang Wang Shu-Lin Liu dai-wen Pang State Key Laboratory of Medicinal Chemical Biology Tianjin Key Laboratory of Biosensing and Molecular Recognition Frontiers Science Center for New Organic MatterResearch Center for Analytical SciencesCollege of ChemistrySchool of MedicineFrontiers Science Center for Cell Responses Nankai University College of Chemistry and Molecular Sciences Wuhan University

Live cells, as reservoirs of biochemical reactions, can serve as amazing integrated chemical plants where precursor formation, nucleation and growth of nanocrystals, and functional assembly, can be carried out accurately following an artificial program. It is crucial but challenging to deliberately direct intracellular pathways to synthesize desired nanocrystals that cannot be produced naturally in cells, because the relevant reactions exist in different spatiotemporal dimensions and will never encounter each other *** article summarizes the progress in the introduction of inorganic functional nanocrystals into live cells via the ‘artificially regulated space–time-coupled live-cell synthesis’ strategy. We also describe ingenious bio-applications of nanocrystal–cell systems, and quasi-biosynthesis strategies expanded from live-cell synthesis. Artificially regulated live-cell synthesis—which involves the interdisciplinary application of biology, chemistry, nanoscience and medicine—will enable researchers to better exploit the unanticipated potentialities of live cells and open up new directions in synthetic biology.

关键词： cell synthesis nanocrystal quantum dot artificial metabolism

Rational design of graphene structures for preparing high-performance thermal interface materials: A mini review

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Science China(Physics,Mechanics & Astronomy) 2022年第11期65卷 46-61页

作者： Junfeng Ying wen dai Jinhong Yu Nan Jiang Cheng-Te Lin Qingwei Yan Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Materials Technology and Engineering(NIMTE)Chinese Academy of SciencesNingbo 315201China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Qianwan Institute Ningbo Institute of Materials Technology and Engineering(NIMTE)Chinese Academy of SciencesNingbo 315201China

With the explosive development in integration of electronic components and the increasing complexity of packaging systems,semiconductor chips own extremely high operation temperatures given by the horrible heat accumulation attributed to the drastically increasing power density. Therefore, highly efficient heat dissipation with the help of rationally designed thermal interface materials(TIMs) is the key to maintaining the device performance and lifespan. Graphene exhibits an ultrahigh intrinsic thermal conductivity, which has attracted a large amount of academic interest due to its significant potential for developing high-performance TIMs. In this tutorial review, we summarize the recent advances in graphene-based TIMs, especially emphasizing the determinate effects of graphene structure and alignment in enhancing the heat transfer capacity of corresponding samples,with detailed discussion in the superiorities and limitations of various graphene skeletons. In addition, we also provide prospects for the challenges and opportunities in the future development of graphene-based TIMs.

关键词： thermal interface material graphene-based composite thermal management thermal conduction

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