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Chinese Journal of Polymer Science 2008年第6期26卷 697-703页

作者：刘结平 Department of Chemistry Huaibei Coal Industry Teachers College

The spherulitic structure and morphology development of poly(ethylene succinate)/poly(ethylene oxide) (PES/PEO) blends with one-step crystallization behavior were observed by means of polarizing optical *** was found that the pure PES spherulite in which the adequate quantity of PEO melt existed in the interlamellar regions,and the blending spherulite formed by both PES and PEO lamellae could form *** the two types of spherulites contacted with each other the front of the blending ...

关键词： PES/PEO blend One-step crystallization Penetrated growth Structure and morphology.

Close coupling calculations for excitation partial cross sections in Ne-HF collisions

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Chinese Physics B 2008年第6期17卷 2097-2102页

作者：余春日 School of Physics & Electric Engineering Anqing Teachers College

This paper reports that an exact quantum close coupling calculation is carried out for rotational excitation in Ne HF collisions on the available anisotropic potential. Partial cross sections are obtained separately at the incident energies of 48.35, 75, 120 and 150meV. The reliability of the results is demonstrated by comparison with previously published theoretical findings. Based on the calculations, the effect of the potential energy surface on the excitation partial cross sections is discussed in detail.

关键词： close coupling calculation excitation partial cross section Ne HF collision

The Synthesis of Podophyllotoxin Derivatives with Macrocyclic Dilactone

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Chinese Chemical Letters 1999年第4期10卷 275-276页

作者： Min YANG Ning CHEN Xin Fu PAN Bing Chang QIN(Department of Chemistry. National Laboratory of Applied Organic Chemistry,Lanzhou University, Lanzhou, 730000)(Department of chemistry, anyang teachers college. anyang 455002) Lanzhou Univ Dept Chem Natl Lab Appl Organ Chem Lanzhou 730000 Peoples R China anyang teachers Coll Dept Chem Anyang 455002 Peoples R China

Starting from podophyllotoxin, five new derivatives with macrocyclic dilactone 5 similar to 9 have been synthesized,and their structures were confirmed by IR, MS,H-1 NMR as well as HRMS. The key step is cyclization by... 详细信息

关键词： podophyllotoxin derivatives macrocyclic dilactone synthesis

Enhanced cycling stability and rate performance of Co-doped and La_(2)O_(3)-coated LiNi_(0.9)Mn_(0.1)O_(2) toward power battery

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Rare Metals 2024年第2期43卷 658-670页

作者： Jia-Qi Peng Yuan-Yuan Wei Dong-Ming Liu Yun Li Bin Hu Bin Huang Jian-Wen Yang Shun-Hua Xiao Ren-Heng Wang Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials College of Chemistry and BioengineeringGuilin University of TechnologyGuilin541004China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen518060China

Ultra-high nickel layered oxide cathode material with high energy density is the most promising material to improve the electrochemical performance of lithium-ion batteries(LIBs).However,the poor structural stability and severe surface/interface side reactions of the material lead to poor rate performance and cyclic stability,which limits its application in *** this paper,the dual-modification strategy of Co doping and La_(2)O_(3) coating is used to meet the above *** doping can effectively widen layer spacing and reduce Li^(+)/Ni^(2+) mixing,and La_(2)O_(3) coating can effectively eliminate the residual alkali on the surface of active material,inhibit the thickening of cathode electrolyte interphase(CEI)film and reduce surface/interface side ***,the modified material(NM90-CL)with excellent electrochemical properties is achieved through the synergistic enhancement of Co doping and La_(2)O_(3) *** capacity retention rate can reach 77.9%after 200 cycles at 1.0℃ and 75.7%after 200 cycles at 5.0℃.Its reversible capacity can up to 153.5 mAh·g^(–1) at 10.0℃.This dual-modification strategy will provide theoretical guidance and technical support for the synthesis of other high-performance electrode materials.

关键词： High nickel cathode material Co doping La_(2)O_(3) coating Electrochemical performance Electrochemical mechanism

Theoretical analysis of mass distribution of quasifission for ^(238)U-induced reactions

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Science China(Physics,Mechanics & Astronomy) 2014年第3期57卷 453-457页

作者： SHEN JunJie SHEN CaiWan School of Science Huzhou Teachers College

Fragment mass distributions of quasifission induced by 238U on 160, 26Mg, 32S, 35C1, 40Ca and 65Zn targets at several bombarding energies have been calculated with the two-step model. The experimental data are reproduced consistently, and the mechanism of the distribution shape is also analyzed by investigating the different incident channels.

关键词： quasifission mass distribution fusion

A theorem on the transcendency of a function

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Chinese Science Bulletin 1998年第1期43卷 24-27页

作者： YU Xiuyuan Hangzhou teachers college, Hangzhou 310012, China Hangzhou teachers college Hangzhou China

For the transcendency of the limit of a sequence of algebraical functions, a theorem is given.

关键词： algebraical functions limit transcendency.

Cu(Ⅱ)-catalyzed aerobic oxidative amidation of azoarenes with amides

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Science China Chemistry 2018年第6期61卷 660-663页

作者： Gang Li Xiaoting Chen Xulu Lv Chunqi Jia Panpan Gao Ya Wang Suling Yang college of Chemistry and Chemical Engineering Anyang Normal University Henan Province Key Laboratory of New Optoelectronic Functional Materials Anyang Normal University

A method for Cu(Ⅱ)-catalyzed dehydrogenative amidation of azoarene using air as the terminal oxidant was developed. Various amides, such as arylamides, alkylamides, lactams, and imides, are all effective amidation reagents and provide the desired products in moderate to excellent yields. Notably, good yields can also be obtained on a gram-scale with this amidation *** this protocol of azoarene amidation, the catalyst(Cu(OAc)_2) and oxidant(air) are inexpensive and readily available, and the process is highly efficient and atom economical.

关键词： copper C-H activation amination aerobic oxidative azo compounds

On Weak Riemann-Stieltjes Integration of Abstract Function Valued in Locally Convex Topological Algebra

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数学进展 1990年第2期 244-245页

作者：张波,曲立学 Qiqihar teachers' college Qiqihar teachers' college

Let A be a locally convex topological *** denote by F the set of allnon-zero multiplicative linear continuous functionals on A and WF the weak topologyon A determined by F. Definition 1 Let x(t),y,(t)be abstract funct... 详细信息

关键词： On Weak Riemann-Stieltjes Integration of Abstract Function Valued in Locally Convex Topological Algebra

Coherent quantum transport in normal-metal/d-wave superconductor/normal-metal double tunnel junctions

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Science China(Physics,Mechanics & Astronomy) 2004年第2期47卷 256-264页

作者： DONG Zhengchao FU Hao Department of Physics Huaiyin Teachers College Huaiyin 223001 China Department of Physics Huaiyin Teachers College Huaiyin 223001 China

Taking into account the effects of quantum interference and interface scattering, combining the electron current with hole current contribution to tunnel current, we study the coherent quantum transport in normal-metal/d-wave superconductor/ normal-metal (NM/d-wave SC/NM) double tunnel junctions by using extended Blonder-Tinkham-Klapwijk (BTK) approach. It is shown that all quasiparticle transport coefficients and conductance spectrum exhibit oscillating behavior with the energy, in which periodic vanishing of Andreev reflection (AR) above superconducting gap is found. In tunnel limit for the interface scattering strength taken very large, there are a series of bound states of quasiparticles formed in SC.

关键词： effects of quantum interference, tunneling spectroscopy, bound state.

Time-delayed feedback control of chaos in a GaAs/AlGaAs heterostructure

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Journal of Semiconductors 2010年第5期31卷 12-16页

作者：杨癸赵雪婷 college of Physics & Electrical Engineering Anyang Normal University college of Science Hebei University of Engineering

A theoretical model has been developed to study nonlinear behaviors in a GaAs/AlGaAs heterostructure. We show that the system can exhibit chaotic oscillations under transverse magnetic fields and an electric *** time-delayed feedback method was applied to stabilize the unstable periodic orbits（UPOs） embedded in the chaotic attractor.A bifurcation specified by a successive decrease in the number of UPOs with delayed time and feedback strength was revealed,indicating the stabilization of UPOs under feedback ***,the introduction of a feedback perturbation will sometimes induce chaotic states that do not exist in the unperturbed system.

关键词： chaos feedback strength delayed time