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Local Lipschitz-α Mappings and Applications to Sublinear Expectations

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Acta Mathematica Sinica,English Series 2014年第5期30卷 844-860页

作者： Huai Xin CAO jun cheng YIN Zhi Hua GUO Zheng Li CHEN College of Mathematics and Information Science Shaanxi Normal University

The aim of this paper is to establish a series of important properties of local Lipschitz-α mappings from a subset of a normed space into a normed space. These mappings include Lipschitz operators, Lipschitz-α opera... 详细信息

关键词： Local Lipschitz-α mapping random variable sublinear expectation

The point spread function reconstruction by using Moffatlets–I

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Research in Astronomy and Astrophysics 2016年第9期16卷 51-64页

作者： Bai-Shun Li Guo-Liang Li jun cheng John Peterson Wei Cui Purple Mountain Observatory Chinese Academy of Sciences Nanjing 210008 China University of Chinese Academy of Sciences Beijing 100049 China Department of Physics Purdue University 525 Northwestern Ave West Lafayette Indiana 47907 USA

Shear measurement is a crucial task in current and future weak lensing survey projects. The reconstruction of the point spread function （PSF） is one of the essential steps involved in this process. In this work, we present three different methods, Gaussianlets, Moffatlets and Expectation Maximization Principal Component Analysis （EMPCA）, and quantify their efficiency on PSF reconstruction using four sets of simulated Large Synoptic Survey Telescope （LSST） star images. Gaussianlets and Moffatlets are two different sets of basis functions whose profiles are based on Gaussian and Moffat functions respectively. EMPCA is a statistical method performing an iterative procedure to find the principal components （PCs） of an ensemble of star images. Our tests show that：（1） Moffatlets always perform better than Gaussianlets. （2） EMPCA is more compact and flexible, but the noise existing in the PCs will contaminate the size and ellipticity of PSF. By contrast, Moffatlets keep the size and ellipticity very well.

关键词： cosmology observations -- stars imaging -- techniques image processing

Mechanical and biological properties of Ti–(0–25 wt%)Nb alloys for biomedical implants application

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Regenerative Biomaterials 2020年第1期7卷 119-127页

作者： Yuqing Zhang Danni Sun jun cheng James Kit Hon Tsoi Jiang Chen School and Hospital of Stomatology Fujian Medical UniversityFuzhou 350002FujianChina Stomatological Key Laboratory of Fujian College and University Fujian Medical UniversityFuzhou 350002FujianChina Faculty of Dentistry Dental Materials ScienceDivision of Applied Oral Sciences and Community Dental CareThe University of Hong KongHong Kong SARChina Shaanxi Key Laboratory of Biomedical Metal Materials Northwest Institute for Non-ferrous Metal ResearchXi’an 710016ShaanxiChina

Binary titanium–niobium(Ti–Nb)alloys have recently been attracted due to low Young’s moduli and non-toxic *** study explores the influence of low Nb content(0–25 wt%)on the comprehensive parameters of tensile stress–strain relationships(ultimate strength(rUTS),yield strength(r0.2)and elastic modulus(E)),surfaces properties(Vickers microhardness,surface roughness(Ra),water contact angle(WCA),X-ray diffraction(XRD)and scanning electron microscopy(SEM)),corrosion resistance(in artificial saliva and lactic acid)and biological properties(cytotoxicity and alkaline phosphatase activity of MC3T3-E1 pre-osteoblasts)of Ti–xNb alloys(x紏5,10,15,20 and 25 wt%),with using commercially pure grade 2 titanium(cp-Ti)as *** results shown that all the Ti–xNb alloys comprised atb Ti alloy phases,such that the b phase increased correspondingly with the increased amount of Nb in the alloy,as well as the reduction of E(69–87 GPa).Except Ti–5Nb,all other Ti–xNb alloys showed a significantly higher hardness,increased rUTS and r0.2,and decreased WCA compared with *** corrosion was detected on Ti–xNb alloys and cp-Ti in artificial saliva and lactic acid *** cytotoxicity of Ti–xNb alloys was comparable to that of cp-Ti in MC3T3-E1 pre-osteoblasts without interference from differentiation behaviour,but the proliferation rate of the Ti–5Nb alloy was lower than other *** overall,binary Ti–(10–25 wt%)Nb alloys are promising candidate for orthopaedic and dental implants due to their improved mechanical properties and comparable biological performance,while Ti–5Nb should be used with caution.

关键词： biomaterial titanium-niobium binary titanium alloys low Young’s modulus biocompatibility

In Situ Inducing Spinel/Rock Salt Phases to Stabilize Ni-Rich Cathode via Sucrose Heat Treatment

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Energy Material Advances 2023年第1期4卷 262-271页

作者： Xiaosong Zhang Mengyuan Wang Ziyin Guo Chunhua Chen Ya-jun cheng Yonggao Xia Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences1219 Zhongguan West RoadZhenhai DistrictNingboZhejiang Province 315201P.R.China University of Chinese Academy of Sciences 19A Yuquan RdShijingshan DistrictBeijing 100049P.R.China Nano Science and Technology Institute University of Science and Technology of China166 Renai RdSuzhou215123Jiangsu ProvinceP.R.China Department of Chemistry College of SciencesShanghai UniversityShanghai 200444P.R.China University of Science and Technology of China 96 Jinzhai RoadHefei 230026Anhui ProvinceP.R.China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences19A Yuquan RdShijingshan DistrictBeijing 100049P.R.China

Nickel-rich cathode materials have attracted widespread interest due to their high capacity;however,the structure is prone to degradation and collapse during cycling,resulting in poor stability performance and safety,hindering the development of high-nickel cathode ***,we propose a straightforward method to consume oxygen on the surface of primary particles during the high-temperature calcination process of precursors,inducing the coupled rearrangement of surface cations,resulting in the in situ generation of a nano-sized mixed spinel/rock salt defect phase,which is confirmed by high-angle annular dark-field scanning transmission electron ***_(0.8)Co_(0.1)Mn_(0.1)O_(2) modified with mixed phase not only can reduce side reactions with the electrolyte,resulting in fewer by-products such as LiF and Li2CO3,preventing the formation of excessively thick cathode-electrolyte interface layers,but also can avoid irreversible phase transitions and prevents lattice *** a result,the cycling performance has been improved to some extent,benefiting from structural *** addition,the special 3-dimensional structure of the spinel phase allows the material surface to expand ion transport channels and enhance multiplicative ***,this study provides a new perspective on the modification of highnickel materials and extends the application of nickel-rich materials.

关键词： cycling nickel electrolyte

Research progress in terahertz quantum-cascade lasers and quantum-well photodetectors

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Chinese Physics B 2020年第8期29卷 59-71页

作者： Zhi-Yong Tan Wen-Jian Wan jun-cheng Cao Key Laboratory of Terahertz Solid-State Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

As semiconductor devices,the terahertz quantum-cascade laser is a coherent source based on intersubband transitions of unipolar carriers while the terahertz quantum-well photodetector is a kind of detector which matches the laser *** are solid-state,electrically operated,and can be easily integrated with other *** paper reviews the state of the art for the design,working performance,and future directions of the two *** applications in photoelectric characterization and imaging are also discussed.

关键词： terahertz semiconductor device photoelectric characterization imaging system

Locus TUTOU2 determines the panicle apical abortion phenotype of rice(Oryza sativa L.)in tutou2 mutant

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Journal of Integrative Agriculture 2022年第3期21卷 621-630页

作者： ZHU Zi-chao LUO Sheng LEI Bin LI Xian-yong cheng Zhi-jun Institute of Crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081P.R.China Rice Research Institute Chongqing Academy of Agricultural SciencesChongqing 400060P.R.China

Rice panicle apical abortion(PAA)is a detrimental agronomic trait resulting in spikelet number reduction and yield *** understand its underlying molecular mechanism,we identified one recessive PAA mutant tutou2 from the offspring of tissue *** mutation locus was finely mapped to a 75-kb interval on the long arm of chromosome *** analysis revealed a single nucleotide substitution of A to T at the 941 position of LOC_Os10g31910 in tutou2,resulting in an amino acid change from isoleucine to *** analysis showed that the degenerated panicle phenotype in tutou2 was rescued in the transgenic lines.A phenotype similar to tutou2 can also be obtained by LOC_Os10g31910 knockout in wild-type *** results suggested that LOC_Os10 g31910 is the causative locus TUTOU2 responsible for the tutou2 PAA phenotype and probably also the locus of DEL1,previously documented as a leaf senescence *** significant phenotypic differences between del1 and tutou2 suggest that the locus DEL1/TUTOU2 plays roles in both leaf and panicle development which were not considered fully in previous studies.

关键词： Oryza sativa L. panicle apical abortion pectate lyase-like gene cloning DEL1

Strange quark matter and proto-strange stars in a baryon density-dependent quark mass model

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Chinese Physics C 2022年第5期46卷 171-179页

作者： Huai-Min Chen cheng-jun Xia Guang-Xiong Peng School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China Center for Gravitation and Cosmology College of Physical Science and TechnologyYangzhou UniversityYangzhou 225009China Theoretical Physics Center for Science Facilities Institute of High Energy PhysicsBeijing 100049China Synergetic Innovation Center for Quantum Effects and Application Hunan Normal UniversityChangsha 410081China

The properties of strange quark matter and the structures of(proto-)strange stars are studied within the framework of a baryon density-dependent quark mass model,where a novel quark mass scaling and self-consistent thermodynamic treatment are *** results indicate that the perturbative interaction has a significant impact on the properties of strange quark *** is determined that the energy per baryon increases with temperature,while the free energy decreases and eventually becomes *** fixed temperatures,the pressure at the minimum free energy per baryon is zero,suggesting that the thermodynamic self-consistency is ***,the sound velocity v in quark matter approaches the extreme relativistic limit(c/√3)as the density *** increasing the strengths of the confinement parameter D and perturbation parameter C,the tendency for v to approach the extreme relativistic limit at high density is slightly ***(proto-)strange stars,the novel quark mass scaling can accommodate massive proto-strange stars with their maximum mass surpassing twice the solar mass by considering the isentropic stages along the star evolution line,where the entropy per baryon of the star matter is set to be 0.5 and 1 with the lepton fraction Y_(l)=0.4.

关键词： strange quark matter temperature thermodynamic

Determination of Metamizole Sodium by Cyclic Voltammetry Under Microwave Activation

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Chemical Research in Chinese Universities 2010年第4期26卷 537-540页

作者： LI Li-jun cheng Long-jun CAI Zhuo LAN Su-mei GUO Xiao-fei LI Yan-qing Department of Biological and Chemical Engineering Guangxi University of Technology Liuzhou 545006 P. R. China College of Chemistry and Chemical Engineering Guangxi University Nanning 530004 P. R. China

Microwave radiation was applied to the detection of metamizole sodium by cyclic voltammetry. The electrochemical characteristics of metamizole sodium were studied by cyclic voltammetry at GC electrode under microwave radiation and a considerable current enhancement was observed for metamizole sodium in aqueous 0.05 mol/L H2SO4. Under the optional conditions, metamizole sodium was determined in the absence and presence of microwave activation. In the absence of microwave activation cyclic voltammogram of metamizole sodium shows good linear relationship in a concentration range of 8.0×10^-5-1.0×10^-3 mol/L in aqueous 0.05 mol/L H2SO4 with a detection limit of 6.75× 10^-6 mol/L（S/N=3） and the equation of linear regression is Ip=12.973c-0.1905（R^2=0.9996, n=6）; in the presence of 80 W microwave activation cyclic voltammogram of metamizole sodiumin shows good linear relationship in a concentration range of 4.0× 10^-5-1.0×10^-3 mol/L in aqueous 0.05 mol/L H2SO4 with a detection limit of 4,41 × 10^-6 mol/L（S/N=3） and the equation of linear regression is Ip=25.107c-0.1193（R^2=0.9973, n=7）. The current in the presence of 80 W microwave activation increases to about 2 orders of magnitude compared with that in the absence of microwave activation. The proposed method in the presence of microwave activation showed high selectivity and sensitivity, and the sampling of the disposal method is simple. The method was verified by the determination of Metamizole Sodium tablet with satisfactory results.

关键词： Microwave Metamizole sodium Cyclic voltammetry

On the Eigenvalue Problem in One-Dimensional Mesoscopic Rings with Electron-Phonon Coupling

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Chinese Physics Letters 1997年第6期14卷 401-404页

作者： WANG Xiao-guang YU Rong-jin XIE cheng-jun Changchun Institute of Physics Chinese Academy of SciencesChangchun 130021 Department of Computer Engineering Changchun UniversityChangchun 130022 Department of Physics Jilin Teachers ColleageJilin 132011

By invoking the concept of displaced number state in quantum optics,the complete eigen-states in one-dimensional mesoscopic rings with electron-phonon coupling are abtained and the eignevalues *** is shown that the ei... 详细信息

关键词： number. phonon coupling