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STUDy On THE THERMODynAMICS OF CuO/Al In SITU Al_2O_3 REInFORCED Al MATRIX COMPOSITES

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Acta Metallurgica Sinica(English Letters) 2004年第5期17卷 732-740页

作者： y.Ma y.Hao S.Z.kou X.n.Lu StateKeyLab.ofAdvancednonferrousMaterials LanzhouUniversityofTechnologyLanzhou730050China

Based on the experiment and the thermodynamics analysis for CuO/Al system, it is founded that the compounding reaction of CuO/Al under low temperature is available. The general equation of adiabatic temperature of the system is set up, and the influence of resultant concentration and temperature on adiabatic temperature is theoretically analyzed. The values of heat effect of CuO/Al system under different temperature are also caculated.

关键词： composites in situ thermodynamics CuO Al exothermic dispersion

The Mehler Formula for the Generalized Clifford-Hermite Polynomials

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Acta Mathematica Sinica,English Series 2007年第4期23卷 697-704页

作者： F.BRACKX n.DE SCHEPPER K.I.kou F.SOMMEn Clifford Research Group Ghent UniversityDepartment of Mathematical AnalysisFaculty of EngineeringGalglaan 2B-9000 GentBelgium University of Macao Department of MathematicsFaculty of Science and TechnologyP.O.Box 3001Macao Clifford Research Group Ghent UniversityDepartment of Mathematical AnalysisFaculty of SciencesGalglaan 2B-9000 GentBelgium

The Mehler formula for the Hermite polynomials allows for an integral representation of the one-dimensional Fractional Fourier transform. In this paper, we introduce a multi-dimensional Fractional Fourier transform in the framework of Clifford analysis. By showing that it coincides with the classical tensorial approach we are able to prove Mehler＇s formula for the generalized Clifford-Hermite polynomials of Clifford analysis.

关键词： Clifford analysis Fractional Fourier transform. Hermite Dolvnomials

Catalyst deactivation in alkaline water splitting

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Science China Chemistry 2023年第2期66卷 301-303页

作者： Tianyi kou yat Li School of Mechanical Electrical and Information EngineeringShandong UniversityWeihai264209China Department of Chemistry and Biochemistry University of California1156 High StreetSanta CruzCalifornia95064USA

Alkaline water splitting(AWS)is one of the low-temperature electrolysis strategies for hydrogen *** is a lowcost technology and has been commercialized for over a *** date,the rated power of a single stack system has ... 详细信息

关键词： splitting alkaline deactivation

LASER CLADDED TiCn COATInGS On THE SURFACE OF TITAnIUM

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Acta Metallurgica Sinica(English Letters) 2007年第3期20卷 210-216页

作者： y.L. yang D. Zhang H.S. kou C. S. Liu College of Science Northeastern University Shenyang 110004 China College of Material and Metallurgy Northeastern University Shenyang 110004 China

Laser cladded coatings of TiCn were produced on the surface of titanium. To obtain the optimal techniques, several conditions were tested by varying the laser scanning rate. The choice of shielding gas was also studied. The cladded coatings were then evaluated from the surface mechanics point of view based on their microhardness. The microstructure of some interesting samples was investigated by optical micrographs （OM）. The results showed that under the condition of fixed pulse frequency and pulse width, the laser scanning rate and the shielding gas are the main factors influencing the components of coatings. TiCn coatings were decompounded and oxidized during the cladding process in the condition of no shielding gas of n2. X-ray diffraction results indicated that the composite coatings composed of TiCn, TiC, Ti2n, and TiO2 were produced using appropriate techniques. The results indicated that the best condition in terms of the surface microhardness is obtained when the scanning rate is 1.5mm/s, the pulse frequency is 15Hz, the pulse width is 3.0ms, and n2 is chosen as the shielding gas. The microhardness of the composite coatings is about 1331kg · mm^-2, which is about 4 times that of the substrate. The optical micrographs indicated that the cladding zone is made up of TiCn, TiO2 and some interdendritic Ti, but the diffusion zone mainly consists of the dendrites phase, and the cladded depth is about 80μm, which is more than 2 times that of the laser nitrided sample. There were no microcracks or air bubbles in the cladded sample, which was cladded using the above optimal techniques.

关键词： laser cladding TiCn coating titanium

SpyStapler-mediated assembly of nanoparticle vaccines

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nano Research 2023年第2期16卷 2821-2828页

作者： Songzi kou Weitao Chen Chenbo Sun Fei Sun Biomedical Research Institute Shenzhen Peking University-The Hong Kong University of Science and Technology Medical CenterShenzhen 518036China Greater Bay Biomedical Innocenter Shenzhen Bay LaboratoryShenzhen 518132China Department of Chemical and Biological Engineering The Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina

The COVID-19 pandemic caused by the severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)has wreaked havoc around the globe,with no end in *** rapid emergence of viral mutants,marked by rapid transmission and effective immune evasion,has also posed unprecedented challenges for vaccine development,not least in its speed,mass production,and *** we report a versatile“plug-and-display”strategy for creating protein vaccines,including those against malaria parasites and SARS-CoV-2,through the combined use of the intrinsically disordered protein ligase SpyStapler and computationally designed viral-like *** resulting protein nanoparticles harboring multiple antigens induce potent neutralizing antibody responses in mice,substantially stronger than those induced by the corresponding free *** modular vaccine design enabled by SpyStapler furnishes us with a new weapon for combatting infectious diseases.

关键词： subunit vaccine SpyTag SARS-CoV-2 malaria

Au(Ⅰ)-Catalyzed Annulation of Benzofurazan n-oxides with ynamides: From Predicting the Chemo-Selectivity to the Synthesis of 7-nitroindole Derivatives

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Chinese Journal of Chemistry 2020年第1期38卷 57-62页

作者： Changlei Zhu Luyao kou Xiaoguang Bao College of Chemistry Chemical Engineering and Materials ScienceSoochow University199 Ren-Ai RoadSuzhou Industrial ParkSuzhouJiangsu215123China

Summaryof main observation and conclusion It could be proposed that gold(I)-catalyzed reactions of ynamides with benzofurazan n-oxidesmightproceed through eitherO-attack or n-attack to affordα-oxo orα-imino Au(I)-*** studies were performed to predict that benzofurazan n-oxides are ready to undergo the chemoselective n-attack tothe Au(I)-activatedynamides to generate theα-imino Au(I)-carbenoid *** studies were carried out to confirm the computational results and the 7-nitroindole derivatives were synthesized in a concise and efficient *** unfavored O-attack for benzofurazan n-oxides,which is in contrast to nitrones and pyridine/quinoline n-oxides,in the Au(I)-catalyzed reactions with ynamides is rationalized.

关键词： oxides catalyzed indole

Rank-One Cross Commutators on Backward Shift Invariant Subspaces on the Bidisk

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Acta Mathematica Sinica,English Series 2009年第5期25卷 693-714页

作者： Kei Ji IZUCHI kou Hei IZUCHI Department of Mathematics Niigata University Graduate School of Science and Technology Niigata University Department of Mathematics Graduate School of ScienceHokkaido University

For a backward shift invariant subspace n in H^2（Г^2）, the operators Sz and Sw on n are defined by Sz = PnTz｜n and Sw, = PnTw｜n, where Pn is the orthogonal projection from L^2（Г^2） onto n. We give a characteri... 详细信息

关键词： backward shift invariant subspace invariant subspace Hardy space cross commutator rank-one operator

Quasilinear Elliptic Equations with neumann Boundary and Singularity

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Acta Mathematicae Applicatae Sinica 2009年第4期25卷 631-646页

作者： Bing-yu kou Shuang-jie Peng School of Mathematics and Statistics Central China Normal University Wuhan 430079 China Institute of Science PLA University of Science and Technology Nanjing 210007 China

Let Ω be a bounded domain with a smooth C2 boundary in Rn（n ≥ 3）, 0 ∈Ω, and n denote the unit outward normal to ЭΩ.We are concerned with the neumann boundary problems： -div（｜x｜α｜△u｜p-2△u）=｜x｜βup（α,β）-1-λ｜x｜γup-1,u（x）〉0,x∈Ω,Эu/Эn=0 on ЭΩ,where 1〈p〈n and α〈0,β〈0 such that p（α,β）△=p（n＋β）/n-p＋α〉p,y〉α-*** various parameters α,βorγ,we establish certain existence results of the solutions in the case 0∈Ω or 0∈ЭΩ.

关键词： Singular equations Caffarelli-Kohn-nirenberg inequalities critical exponents ground state sloutions

Determination of Biotin in Pharmaceutical Formulations by Potassium Permanganate-luminol-CdTe nanoparticles Chemiluminescence System

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Chemical Research in Chinese Universities 2012年第4期28卷 604-608页

作者： TRAORE Zoumana Sékou SU Xing-guang College of Chemistry Jilin University

A sensitive flow-injection chemiluminescence method was developed for the determination of biotin in the pharmaceutical *** affinity between avidin and biotin was used to adsorb biotin on the polystyrene,with subsequent quantification of biotin based on its ability to enhance the chemiluminescence（CL） signal generated by the redox reaction of potassium permanganate-luminol-CdTe nanoparticles CL *** investigations prove that apart from 3-aminophthalate,the CdTe quantum dots（QDs） play both catalytic and emitter *** optimum conditions,the linear range for the determination of biotin was 0.01―25 ng/mL with a detection limit of 7.3×10-3 ng/mL（S/n=3）.The relative standard deviation of 5 ng/L biotin was 2.06%（n=7）.The proposed method was used to determine the biotin concentration in the pharmaceutical formulations and the recovery was between 96.4% and 104%.The proposed method is simple,convenient,rapid and sensitive.

关键词： Flow-injection Chemiluminescence Biotin CdTe nanoparticle