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Solvothermal Synthesis, Crystal Structure and Characterization of a New Binuclear Copper(Ⅱ) Complex with K^(3):N^(1):N^(2):N^(4)-3-(Pyridin-2-yl)-1,2,4-triazole(HPT)

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Chinese Journal of Structural Chemistry 2021年第4期40卷 453-458,406页

作者： LI Chong-yu yu peng School of Chemistry and Materials Science Hunan Agricultural UniversityChangsha 410128China

A new binuclear copper(Ⅱ)complex[Cu_(2)(MBBA)_(2)(HPT)_(2)(H_(2)O)_(2)]·2H_(2)O(1)was synthesized with copper acetate,2-(4-methylbenzoyl)benzoic acid(MBBA)and 3-(pyridin-2-yl)-1H-1,2,4-triazole(HPT).It crystallizes in the monoclinic space group P21/c with a=14.722(2),b=8.8907(12),c=18.5565(18)A,β=116.820(7)o,V=2167.6(5)A^(3),Mr=483.96,Dc=1.483 g/cm^(3),Z=4,μ(Mo Ka)=1.049 mm^(-1),F(000)=981,the final GOOF=0.952,R=0.0586 and w R=*** whole molecule consists of two copper ions bridged by two HPT *** central Cu(Ⅱ)ion is coordinated by six atoms to give a distorted octahedral coordination *** structure of 1 has been determined by X-ray diffraction,IR spectrum and thermal stability *** solid-state fluorescence displays an obvious emission band at 412 nm upon excitation at 330 *** properties indicate that 1 exhibits antiferromagnetic properties.

关键词： binuclear copper(Ⅱ)complex thermal stability fluorescence magnetic property

Carbon steel slag as cementitious material for self-consolidating concrete

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第7期11卷 488-494页

作者： yu-Chu peng Chao-Lung HWANG Graduate Institute of Construction Engineering National Taiwan University of Science and Technology Taipei Department of Leisure Management Taiwan Hospitality and Tourism College Taipei

This study deals with the recycling of carbon steel slag (CSS) to produce self-consolidating concrete (SCC). Since the chemical composition of CSS is similar to that of Portland cement or blast furnace slag (BFS), it is expected to behave similarly. In the current study, the pozzolanic activity index of CSS is examined. Furthermore, the use of CSS as a pozzolanic material to partially replace Portland cement in the production of SCC is tested. We designed concrete mixtures with different water-tocementitious material ratios (w/cm) keeping water and superplasticizer (SP) contents constant. Results showed that the design and performance of all the concrete mixtures used in this investigation were comparable to those of SCC and high performance concrete (HPC). However, compared to ordinary plain concrete (OPC), the additional CSS content increases the setting time. In the CSS mixtures set for 90 d, compressive strengths of 86%, 134% and 121% were attained as compared to the control concrete; the corresponding w/cm ratios were 0.28, 0.32 and 0.40, respectively. Verifying the soundness of the SCC for meeting the criteria for HPC, the ultrasonic pulse velocity (UPV) of CSS was found to be comparable to that of ordinary concrete. In conclusion, the recycling of CSS can be advantageously employed in the production of SCC.

关键词： Carbon steel slag (CSS) Self-consolidating concrete (SCC) Pozzolanic Recycling

An improved solution to geometric distortion using an orthogonal method

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Research in Astronomy and Astrophysics 2017年第2期17卷 89-96页

作者： Huan-Wen peng Qing-yu peng Na Wang yunnan Observatories Chinese Academy of Sciences Kunming 650216 China Department of Computer Science Jinan University Guangzhou 510632 China University of Chinese Academy of Sciences Beijing 100049 China Sino-French Joint Laboratory for Astrometry Dynamics and Space Science Jinan University Guangzhou 510632 China

The geometric distortion of a CCD field of view has a direct influence on the positional measurements of CCD observations. In order to obtain high precision astrometric results, the geometric distortion should be derived and corrected precisely. As presented in our previous work, a convenient solution has been carried out and has also been applied to observations of Phoebe. In order to fur- ther improve the solution, an orthogonal method based on Zernike polynomials is used in this work. Four nights of CCD observations including Himalia, the sixth satellite of Jupiter, and open clusters （NGC 1664 or NGC 2324） on each night have been processed as an application. The observations were obtained from the 2.4 m telescope administered by yunnan Observatories. The catalog UCAC4 was used to match reference stars in all of the CCD frames. The ephemeris of Himalia is retrieved from the Institut de M6canique C61este et de Calcul des Ephemerides （IMCCE）. Our results show that the means of observed minus calculated （O - C） positional residuals are -0.034 and -0.026 arcsec in right ascension and declination, respectively. The corresponding standard deviations are 0.031＂ and 0.028＂. The measurement dispersion is significantly improved compared to that by using our previous solution.

关键词： astrometry -- planets and satellites: individual (Himalia) -- methods: observational

Preliminary results of CCD observations targeting Himalia acquired at yunnan Observatories in 2015

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Research in Astronomy and Astrophysics 2016年第12期16卷 59-66页

作者： Huan-Wen peng Na Wang Qing-yu peng Sino-French Joint Laboratory for Astrometry Dynamics and Space ScienceJinan UniversityGuangzhou 510632China yunnan Observatories Chinese Academy of SciencesKunming 650216China University of Chinese Academy of Sciences Beijing 100049China

In order to study the potential associated with high precision CCD astrometry of irregular satel- lites, we have acquired experimental observations of Himalia, the sixth and irregular satellite of Jupiter. A total of 185 CCD observations were obtained by using the 2.4m and 1 m telescopes administered by yunnan Observatories over ten nights. Preliminary analysis of the observations were made, including geo- metric distortion, atmospheric refraction, and also the phase effect. All positions of Himalia are measured relative to the reference stars from the catalog UCAC4 in each CCD field of view. The theoretical positions of Himalia were retrieved from the Institute de M6chanique C61este et de Calcul des t^ph6m6rides, while the positions of Jupiter were obtained based on the planetary ephemeris INPOP13c. The results show that the means of observed minus computed （O - C） residuals are -0.004＂ and -0.002＂ in right ascension and declination, respectively. The standard deviations of （O - C） residuals are estimated to be about 0.04＂ in each direction.

关键词： astrometry -- planets and satellites: individual (Himalia) -- methods: observational

Eclipses and Occultations of Galilean Satellites Observed at yunnan Observatory in 2003

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Chinese Journal of Astronomy and Astrophysics 2007年第2期7卷 317-324页

作者： Qing-yu peng Benoit Noyelles Department of Computer Science Jinan University Guangzhou 5106321 Institut de mecanique celeste et de calcul des ephemerides - Observatoire de Paris UMR 8028 du CNRS 77 avenue Denfert-Rochereau F-75014 Paris France Joint Laboratory for Optical Astronomy Chinese Academyof Sciences Kunming 650011

We describe and analyze observations of mutual events of Galilean satellites made at the yunnan Observatory in February 2003 from CCD imaging for the first time in China. Astrometric positions were deduced from these photometric observations by modelling the relative motion and the photometry of the involved satellites during each event.

关键词： planets and satellites individual Jupiter- astrometry - eclipse - occultation

Mapping the Spinless Fermion-Boson Model onto a Luttinger Liquid Model

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Chinese Physics Letters 1996年第11期13卷 801-804页

作者： WANG yu-peng PU Fu-ke Cryogenic Laboratory Chinese Academy of SciencesBeijing 100080 Department of Physics Guangzhou Teacher’s CollegeGuangzhou 510400 Institute of Physics Chinese Academy of SciencesBeijing 100080

The spinless fermion-boson model in one-dimension is studied via the Bethe ansatz *** eigenstates of the model Hamiltonian are *** long distance correlation functions are calculated based on the prediction of the conformal field *** is shown that the low energy physics of the present model is equivalent to that of a Luttinger liquid model.

关键词： theory method Fermi

A Note on Gradient Estimates for Elliptic Equations with Discontinuous Coefficients

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Chinese Annals of Mathematics,Series B 2024年第1期45卷 1-10页

作者： yu peng Xiandong SUN Huichun ZHANG Department of Mathematics Sun Yat-Sen UniversityGuangzhou 510275China.

The authors will use a method in metric geometry to show an L^(P)-estimate for gradient of the weak solutions to elliptic equations with discontinuous coefficients,even the BMO semi-norms of the coefficients are not *... 详细信息

关键词： L^(p)-Estimate Elliptic equation Discontinuous coefficients

Exact Solution of a Backward Scattering Kondo Model

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Chinese Physics Letters 1996年第9期13卷 703-706页

作者： WANG yu-peng PU Fu-ke Cryogenic Laboratory Chinese Academy of SciencesBeijing 100080 Department of Physics Guangzhou Teachers’CollegeGuangzhou 510400 Institute of Physics Chinese Academy of SciencesBeijing 100080

To specify the difference between the one-dimensional Kondo problem and the three-dimensional Kondo problem,we consider a model which describes the interaction between one-dimensional free electrons and a magnetic *** ansatz exact results and scaling analysis show that if J_(F)>-|J_(B)|,the Kondo screening *** is no ferromagnetic Kondo screening in such a system but the long range antiferromagnetic Kondo coupling is *** soon as the Coulomb interaction is introduced,the crossovers between the scaling trajectories in the parameter region J_(F)<-|J_(B)|and the trajectories in other parameter regions arise and ferromagnetic Kondo screening may occur.

关键词： Kondo ferromagnetic scaling

Development of high performance and high strength heavy concrete for radiation shielding structures

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International Journal of Minerals,Metallurgy and Materials 2011年第1期18卷 89-93页

作者： yu-Chu peng Chao-Lung Hwang Graduate Institute of Construction Engineering Taiwan University of Science and Technology Taipei 11243 China Taipei Department of Resort and Leisure Management Taiwan Hospitality ＆ Tourism College Taipei 11243 China Taipei

Heavy concrete currently used for construction contains special materials that are expensive and difficult to work *** study replaced natural aggregate（stones） in concrete with round steel balls,which are inexpensive and easily *** diameters of the steel balls were 0.5 and 1 cm,and their density was 7.8 kg/*** packing mixture methods were used to produce heavy concrete with densities of 3500 and 5000 kg/*** various properties of this concrete were tested according to the standards of the American Society for Testing and Materials（ASTM）.The results indicated that the construction slump of the concrete could reach 260-280 mm and its slump flow could reach 610-710 *** important,its compressive strength could reach 8848 *** results will significantly alter traditional construction methods that use heavy concrete and enhance innovative ideas for structural design.

关键词： radiation shielding composite structures concretes concrete construction materials properties