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Theoretical Study on Reaction Mechanism of Aluminum-Water System

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Chinese Journal of Chemical Physics 2008年第3期21卷 245-249页

作者： yun-lan Sun Yan Tian Shu-fen Li Department of Chemical Physics University of Science and Technology of China Hefei 230026 China School of Metallurgy and Resources Anhui University of Technology Maanshan 243002 China

A theoretical study on the reaction of aluminum with water in the gas phase was performed using the hybrid density functional B3LYP and QCISD（T） methods with the 6-311＋G（d,p） and the 6-311＋＋G（d,p） basis sets. The results show that there are three possible reaction pathways that involve four isomers, seven transition structures, and two possible products for the reaction of aluminum with water. The two most favorable reaction pathways were found, whose intermediates and products agreed quite well with experimental results. The enthalpy and Gibbs free energy change of the reaction between A1 and H2O at 298 and 2000 K were calculated. Some results are also in good agreement with the previous calculations or experimental results.

关键词： Aluminum Water Reaction mechanism Hybrid density functional theory

Left-definite boundary conditions of Sturm-Liouville problems when the interval shrinks to a point

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Applied Mathematics(A Journal of Chinese Universities) 2011年第1期26卷 29-37页

作者： GAO yun-lan WANG Zhong WU Hong-you Department of Mathematics Inner Mongolia University of Technology Huhhot 010051 China Department of Mathematics ZhaoQing University Zhaoqing 526061 China Department of Mathematics Northern Illinois University DeKalb IL60115 USA

On the condition that the interval of the problem shrinks to a point, we investigated the separated boundary conditions Sα,β of left-definite Sturm-Liouville problem, and answered the following question： Is there a co ∈ J such that Sα,β is always left-definite or semi-left-definite for the Sturm-Liouville equation for each c ∈ （a, co）？

关键词： Left-definite Sturm-Liouville problem semi-left-definite Sturm-Liouville problem separatedboundary condition.

Investigation of trace elements in Guangxi ancient pottery by INAA

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Nuclear Science and Techniques 1997年第1期8卷 33-37页

作者： PengZi－Cheng yun－lan 等 DepartmentofEarthandSpaceScience StructureResearchLaboratory UniversityofScienceandTechnologyofChina

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关键词：中子激活分析古代陶瓷示踪元素

Controllable Synthesis of a Well-defined Polypropylene grafted Silica Nanoparticles and Its Effect on Crystallization Behavior of Polypropylene

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Chinese Journal of Polymer Science 2022年第11期40卷 1411-1421页

作者： Wei-Long Ju Shao-Fan Li yun-lan Su Du-Jin Wang Key Laboratory of Engineering Plastics Beijing National Laboratory for Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing100190China University of Chinese Academy of Sciences Beijing100049China

Well-defined polypropylene grafted silica nanoparticles(PP-g-SiO_(2))were prepared through the reaction of maleic anhydride grafted polypropylene(PP-g-MAH)with amino-functionalized silica(SiO_(2)-NH_(2))by the'grafting-to'*** grafting density of PP-g-SiO_(2) is found to be controlled by the concentration of silane coupling agent 3-[2-(2-aminoethylamino)ethyl amino]propyl trimethoxy silane(TAMS).The maximum grafting density of grafted PP-g-MAH chains with molecular weight of 9100 g/mol could reach 0.34 chains/nm~2,when the critical concentration of TAMS was 0.0194 mol/*** critical concentration of TAMS can be explained by the maximum amounts of primary amino groups,which can totally react with PP-g-MAH on the surface of SiO_(2)-NH_(2),when the silane monolayer is *** synthesized PP-g-SiO_(2)with different molecular weights was mixed with PP by solution mixing to form a series of *** crystallization temperature(T_(c))of nanocomposites increased significantly with the particle *** PP-g-SiO_(2) with high molecular weight of grafted chains exhibits a high nucleation ability at 1 wt%nanoparticle loading in PP/PP-g-SiO_(2)*** summary,we provide an effective method to synthesize the well-defined PP-g-SiO_(2)with controlled grafting density,which shows excellent nucleation ability.

关键词： Polypropylene grafted silica nanoparticles Grafting density Grafting to Crystallization behavior

Quantum transport signatures of non-trivial topological edge states in a ring-shaped Su–Schrieffer–Heeger double-chain system

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Chinese Physics B 2022年第2期31卷 558-565页

作者： Cheng-Zhi Ye lan-yun Zhang Hai-Bin Xue School of Physics and Electronic Engineering Linyi UniversityLinyi 276005China Key Laboratory of Interface Science and Engineering in Advanced Materials Ministry of EducationTaiyuan University of TechnologyTaiyuan 030024China

In the ring-shaped Su–Schrieffer–Heeger(SSH)double-chain,the quantum interference between the two different electron tunneling paths of the upper and lower chains has an important influence on the electron transport properties of non-trivial topological edge ***,we have studied the electron transport signatures of non-trivial topological edge states in a ring-shaped SSH double-chain system based on the wave-guide theory and transfer-matrix *** the ringshaped SSH double-chain with the upper chain being different from the lower one,it is demonstrated that the electron transmission probability displays the four and two resonance peaks associated with the non-trivial topological edge states in the weak and strong coupling regimes,*** in the case of the upper chain being the same as the lower one,the two transmission resonance peaks associated with the non-trivial topological edge states in the weak coupling regime are only found,and that in the strong coupling regime disappear that originated from the destructive interference between the two different electron tunneling paths of the upper and lower ***,the variation of the number of transmission resonance peaks associated with the non-trivial topological edge states in the weak and strong coupling regimes suggests that an alternative scheme for detecting non-trivial topological edge states in the ring-shaped SSH doublechain system.

关键词： ring-shaped Su-Schrieffer-Heeger double-chain non-trivial topological edge states transmission probability

Multi-source Remote Sensing Image Registration Based on Contourlet Transform and Multiple Feature Fusion

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International Journal of Automation and computing 2019年第5期16卷 575-588页

作者： Huan Liu Gen-Fu Xiao yun-lan Tan Chun-Juan Ouyang College of Electronic and Information Engineering Jinggangshan UniversityJi′an 343009China Key Laboratory of Watershed Ecology and Geographical Environment Monitoring National Administration of SurveyingMapping and Geoinformation(NASG)Ji′an 343009China College of Mechanical and Electronic Jinggangshan UniversityJi′an 343009China

Image registration is an indispensable component in multi-source remote sensing image processing. In this paper, we put forward a remote sensing image registration method by including an improved multi-scale and multi-direction Harris algorithm and a novel compound feature. Multi-scale circle Gaussian combined invariant moments and multi-direction gray level co-occurrence matrix are extracted as features for image matching. The proposed algorithm is evaluated on numerous multi-source remote sensor images with noise and illumination changes. Extensive experimental studies prove that our proposed method is capable of receiving stable and even distribution of key points as well as obtaining robust and accurate correspondence matches. It is a promising scheme in multi-source remote sensing image registration.

关键词： Feature fusion multi-scale circle Gaussian combined invariant moment multi-direction gray level co-occurrence matrix multi-source remote sensing image registration contourlet transform

Orbital Stability of Solitary Waves of Compound KdV-type Equation

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Acta Mathematicae Applicatae Sinica 2015年第4期31卷 1033-1042页

作者： Wei-guo ZHANG Hui-wen Li Xiao-shuang BU lan-yun BIAN School of Science University of Shanghai for Science and Technology

In this paper, we study the orbital stability of solitary waves of compound KdV-type equation in the form of ut ＋ auPux ＋ bu2pux ＋ Uzzz = 0 （b 〉 0, p 〉 0）. Our results imply that orbital stability of solitary waves is affected not only by the highest-order nonlinear term bu2pux, but also the nonlinear term auPux. For the case of b 〉 0 and 0 〈 p ≤ 2, we obtain that the positive solitary wave Ul（X - ct） is stable when a 〉 0, while that unstable when a 〈 0. The stability for negative solitary wave u2（x - ct） is on the contrary. In particular, we point that the nonlinear term with coefficient a makes contributes to the stability of the solitary waves when p= 2 and a〉0.

关键词： orbital stability compound KdV-type equation solitary waves spectral analysis

Cimicifuga heracleifolia is therapeutically similar to black cohosh in relieving menopausal symptoms: evidence from pharmacological and metabolomics studies

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Chinese Journal of Natural Medicines 2019年第6期17卷 435-445页

作者： MIAO lan-yun CHU Thi Thanh Huyen LI Ping JIANG Yan LI Hui-Jun State Key Laboratory of Natural Medicines China Pharmaceutical UniversityNanjing 210009China College of Chemical Engineering Nanjing Forestry UniversityNanjing 210037China

In the market of botanical dietary supplements, Cimicifuga heracleifolia(CH) has always been considered as an adulterated species of Cimicifuga racemosa(CR), a conventional American herb with promising benefits to counteract troubles arising from the menopause. However, the detailed comparison of their therapeutic effects is lacking. In present study, the pharmacological and metabolomics studies were comparatively conducted between CH and CR in ovariectomized(OVX) female rats. Specifically, estrogen-like, anti-hyperlipidemia and anti-osteoporosis effects were evaluated through measuring serum biochemical parameters, histopathological examination and micro computed tomography(Micro-CT) scanning. At the same time, a gas chromatography-mass spectrometry(GC-MS)-based serum metabolomics method was employed to profile the metabolite compositional changes. As a result, both CR and CH displayed anti-osteoporosis and anti-hyperlipemia on menopause syndrome. Meanwhile, their potentials in improving the OVX-induced metabolic disorders were discovered. In conclusion, these results demonstrated that CH is therapeutically similar to CR in relieving menopausal symptoms and CH could be considered as a promising alternative to CR instead of an adulterant in the market of botanical dietary supplements.

关键词： Cimicifuga heracleifolia Black cohosh Menopausal symptoms Metabolomics Substitute

Intra-abdominal pressure monitoring in predicting outcome of patients with severe acute pancreatitis

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Hepatobiliary & Pancreatic Diseases International 2007年第4期6卷 420-423页

作者： Zhang, Wei-Fang Ni, yun-lan Cai, Ling Li, Tong Fang, Xue-Ling Zhang, yun-Tao Zhejiang Univ Sch Med Affiliated Hosp 1 Intens Care Unit Hangzhou 310003 Peoples R China Hangzhou Hosp Tradit Chinese Med Dept Resp Syst Hangzhou 310003 Peoples R China

BACKGROUND: Severe acute pancreatitis (SAP) is a serious disease with many complications, high mortality and poor prognosis. It is characterized by rapid deterioration and poses one of the most difficult challenges in clinical practice. Previous investigations suggest that SAP is one of the main causes of intra-abdominal pressure (IAP) increase. The aim of this study was to evaluate the utility of IAP-monitoring in predicting the severity and prognosis of SAP. METHODS: Eighty-nine patients with SAP who had been treated from February 2001 to December 2005 were studied. Since bladder pressure accurately reflects IAP, we measured it instead of IAP. Bladder pressure was measured at the time of admission and every 12 hours in the course of the disease, 9 consecutive times in all. The APACHE II scores of all patients were obtained within 24 hours after admission. According to a maximum bladder pressure <10 cmH(2)O, all patients were divided into two groups, mildly-elevated and severely-elevated. Mortality and mean APACHE II scores in the two groups were calculated. In addition, the mean bladder pressure and APACHE II scores in survivors were compared with those in deaths. RESULTS: Sixty-eight of the 89 patients were in the severely-elevated group. Mortality and mean APACHE II scores in this group were much higher than those in the mildly-elevated group (mortality, 39.71% vs. 9.52%; mean APACHE II score, 23.15 +/- 7.42 vs. 15.95 +/- 5.35, P<0.01). The mean bladder pressures and APACHE II scores in deaths were significantly greater than those in survivors (mean bladder pressure, 14.1 +/- 3.8 vs. 9.2 +/- 2.3 cmH(2)O, P<0.01; mean APACHE II score, 27.83 +/- 4.87 vs. 18.37 +/- 6.74, P<0.01). CONCLUSION: It is suggested that IAP may be used as a marker of the severity and prognosis of SAP.

关键词： severe acute pancreatitis intra-abdominal pressure APACHE II score mortality