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Practical method and application study for predicting cyclic accumulative deformations of the saturated soft clay

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Journal of Mountain Science 2017年第11期14卷 2348-2358页

作者： HE Lin-lin WANG Yuan-zhan LI shu-zhao WANG zhao-yang Key Laboratory of Hydraulic and Waterway Engineering of Ministry of Education Key Laboratory of regulation technology for inland waterway in transportation industry Chongqing Jiaotong University State Key Laboratory for Simulation & Safety of Hydraulic Engineering Tianjin Key Laboratory of Harbor & Ocean Engineering Tianjin University CNOOC Research Institute

The distribution of saturated soft clay is greatly wide in China. The current main measures adopted to deal with soft soil foundations may lead to environmental pollution, even some engineering accidents may happen on soft soil foundations. In order to solve engineering problems of saturated soft soil foundations well, researches of mechanical properties of them are necessary. One of the most important mechanical characteristics of saturated soft clay is its cyclic accumulative deformation under cyclic loadings. For saturated soft clay, the cyclic accumulative deformation is similar to the creep behavior under static loadings. Therefore, the cyclic accumulative deformation is equivalent to the creep, the number of loading cycles is seen as the time, and this study develops a practical method for predicting the cyclic accumulative deformation of saturated soft clay with the creep theory. The method is a pseudostatic elasto-plastic finite element method implemented by ABAQUS software. A fitted equation between cyclic accumulative strain and number of loading cycles and the empirical relationship of parameters of fitted equation were established with aseries of cyclic triaxial compression tests. Then with this empirical relationship of parameters, the method developed by this study was employed to predict the cyclic accumulative deformation under cyclic triaxial tension tests. Predicted results were in good agreement with test results, and the effectiveness of this method was thus validated for different stress states. The method was then applied in analyzing the cyclic accumulative deformation for soft soil foundation of a pile-supported wharf structure.

关键词： Saturated soft clay Finite elementmethod Soil tests Cyclic accumulativedeformation Creep theory

Visible light response ZnO-C_(3)N_(4) thin film photocatalyst

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Rare Metals 2021年第1期40卷 96-104页

作者： Yue Zhang shu-Man zhao Qi-Wen Su Jun-Li Xu School of Science Northeastern University.Shenyang 110004China

Nanoflower-like ZnO-C_(3)N_(4) thin film with a porous net structure was successfully synthesized by a simple chemical corrosion *** prepared ZnOC_(3)N_(4) thin films presented remarkable photocatalytic activities for the degradation of methyl orange under visible light irradiation,and more than 90%methyl orange was removed from water by ZnO-C_(3)N_(4) ***,the ZnO-C_(3)N_(4) composite presented an enhanced photocatalytic *** loading content of C_(3)N_(4) had a great effect on the photocatalytic ***,the photocatalytic activities were higher in acidic media than those in alkaline *** adsorption of methyl orange was enhanced,and the recombination of photogenerated electrons and holes was suppressed with a suitable content of C_(3)N_(4).However,too much loading content of C_(3)N_(4) resulted in a poor dispersion of C_(3)N_(4) as the aggregated C_(3)N_(4) can behave as recombination *** addition,the prepared ZnO-C_(3)N_(4) thin film can be used for the water splitting in water-methanol system under simulated solar light irradiation.

关键词： ZnO-C_(3)N_(4)thin film Photodegradation Water splitting Visible light irradiation Photocatalytic stability

Upper gastrointestinal hemorrhage caused by superwarfarin poisoning

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World Journal of Gastroenterology 2010年第13期16卷 1680-1682页

作者： zhao, shu-Lei Li, Peng Ji, Ming Zong, Ye Zhang, shu-Tian Capital Med Univ Beijing Friendship Hosp Dept Gastroenterol Beijing 100050 Peoples R China

Superwarfarins are a class of rodenticides. Gastrointestinal hemorrhage is a fatal complication of superwarfarin poisoning, requiring immediate treatment. Here, we report a 55-year-old woman with tardive upper gastroi... 详细信息

关键词： Esophagogastroduodenoscopy Upper gastrointestinal hemorrhage Superwarfarin poisoning

Spacial Structure of Cationic Phosphorus Ligand-Ru （Ⅱ） Halide Complexes-by DFT Study

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Chinese Chemical Letters 2005年第11期16卷 1555-1558页

作者： Yi Xin zhao shu Guang WANG School of Chemistry and Chemical Technology Shanghai Jiaotong University Shanghai 200240

The full-parameter geometry optimization of cationic （ S ） - BINAP - Ru （ Ⅱ ） halide complex was performed by DFT method using B3LYP, PW91 and PBE potentials with several basis sets. PW91 with 3-21G / SDD basis sets is found to be the most suitable method with consideration of both precision and efficiency. The dihedral angles （ θ ） of the binaphthyl or biphenyl with different phosphorus ligand - Ru （ Ⅱ ） halide complexes were found changing from 59.9 to 79.3 degree, while the natural bite angle （ βn ） of those complexes only changes from 87.4 to 90.3 degree. It is different from the common view of asymmetric organic chemists＇ that θ directly influences βn.

关键词： Chiral phosphorus ligand DFT dihedral angle(θ) natural bite angle(βn).

Studies on the Rice LEAF INCLINATION1 （LC1）, an IAA-amido Synthetase, Reveal the Effects of Auxin in Leaf Inclination Control

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Molecular Plant 2013年第1期6卷 174-187页

作者： shu-Qing zhao Jing-Jing Xiang Hong-Wei Xue National Key Laboratory of Plant Molecular Genetics institute of Plant Physiology and Ecology Shanghai Institutes for Biological Sciences ChineseAcademy of Sciences Shanghai 200032 China

The angle of rice leaf inclination is an important agronomic trait and closely related to the yields and archi- tecture of crops. Although few mutants with altered leaf angles have been reported, the molecular mechanism remains to be elucidated, especially whether hormones are involved in this process. Through genetic screening, a rice gain-of- function mutant leaf inclination1, Icl-D, was identified from the Shanghai T-DNA Insertion Population （SHIP）. Phenotypic analysis confirmed the exaggerated leaf angles of Icl-D due to the stimulated cell elongation at the lamina joint. LC1 is transcribed in various tissues and encodes OsGH3-1, an indole-3-acetic acid （IAA） amido synthetase, whose homolog of Arabidopsis functions in maintaining the auxin homeostasis by conjugating excess IAA to various amino acids. Indeed, recombinant LC1 can catalyze the conjugation of IAA to Ala, Asp, and Asn in vitro, which is consistent with the decreased free IAA amount in Icl-D mutant. Icl-D is insensitive to IAA and hypersensitive to exogenous BR, in agreement with the microarray analysis that reveals the altered transcriptions of genes involved in auxin signaling and BR biosynthesis. These results indicate the crucial roles of auxin homeostasis in the leaf inclination control.

关键词： rice leaf inclination auxin GH3.

Photophysical Behavior of Heteroduplexes Formed from Naphthalene Incorporated Foldamers,and Linear Donors and Pyromellitic Diimide Incorporated Foldamers

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Chemical Research in Chinese Universities 2009年第3期25卷 317-327页

作者： zhao shu-min GU Hai-ning ZHOU Qi-zhong Key Laboratory for Molecular Design and Nutrition Engineering of Ningbo Ningbo Institute of Technology of Zhejiang University Ningbo 315100 P. R. China Department of Chemistry Zhejiang University Hangzhou 310027 P. R. China

The authors synthesized the electron-rich 1,5-dioxonaphthyl group incorporated foldamers, and linear donors and electron-deficient pyromellitic diimide incorporated foldamers, which were investigated in organic solvents. There is an evident charge transfer process from the donors to the electron-deficient foldamers, due to the donor-acceptor interaction of the heteroduplexes formed from the donors and the electron-deficient foldamers in chloroform, observed by using the ultraviolet（UV） visible method. The charge transfer process of the heteroduplexes depends on the molecular structure（not only the number of 1,5-dioxonaphthyl groups and pyromellitic diimide groups in the heteroduplex, but also the intermolecular double hydrogen bond in the heteroduplex）, the intercalative π-π stacking motif, the initial concentration of heteroduplexes, and the polarity of the solvent. Fortunately, the authors found a critical bumping concentration（CBC） of the donors in acetonitrile or chloroform, which is useful in quantitative research, by using the fluorescence method. The value of CBC depends not only on intramolecular folding and the intramolecular hydrogen bond, but also on intramolecular π-π stacking and the solvent. The electron-deficient foldamers quenched the fluorescence of the donors. Fluorescence quenching depends not only on the number of pyromellitic diimide groups and 1,5-dioxonaphthyl groups in the heteroduplex, but also on the intercalative π-π stacking motif between the donor and the acceptor.

关键词： Heteroduplex Foldarner Linear donor Charge transfer Quench

Self-healing Behavior of Ethylene Propylene Diene Rubbers Based on Ionic Association

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Chinese Journal of Polymer Science 2019年第7期37卷 700-707页

作者： Zhi-Fei Zhang Kun Yang shu-Gao zhao Lai-Na Guo Key Laboratory of Rubber-plastics Ministry of Education/Shandong Provincial Key Laboratory of Rubber-PlasticsQingdao University of Science & TechnologyQingdao 266042China College of Chemical Engineering and Materials Science Tianjin University of Science & TechnologyTianjin 300457China Hutchinson research centerRue Gustave NourryChalette sur Loing45120France

To meet the increasing demand for safe, environmentally friendly and high-performance smart materials, self-healing rubbers are highly desired. Here, the self-healing performance of ethylene propylene diene monomer rubber (EPDM) is reported, which was designed by graft-polymerization of zinc dimethacrylate (ZDMA) onto rubber chains to form a reversible ionic cross-linked network. Single ionic cross-linked network and dual network, combining covalent and ionic cross-links, could be tuned by controlling vulcanization process to achieve tailorable mechanical and self-healing properties. It was found that ionic cross-linked EPDM showed a recovery of more than 95% of the original mechanical strength through a healing process of 1 h at 100 °C. The covalent cross-links could improve mechanical properties but block self-healing. Adding 50 wt% liquid rubber to “dry” EPDM could effectively enhance self-healing capability of the dual cross-linked network and the healed tensile strength could reach 0.9 MPa. A compromise between mechanical performance and healing capability could be potentially tailored by controlling vulcanization process and liquid rubber content.

关键词： Ionic bond Self-healing Ethylene propylene diene rubber Dual-network

An in situ infrared study of dimethyl carbonate synthesis from carbon dioxide and methanol over well-shaped CeO2

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Chinese Chemical Letters 2017年第1期28卷 65-69页

作者： shu-yang zhao sheng-ping wang yu-jun zhao xin-bin ma key laboratory for green chemical technology school of chemical engineering and technologytianjin universitycollaborative innovation center of chemical science and engineeringTianjin 300072China

The mechanism of dimethyl carbonate（DMC） formation from CO2 and methanol is investigated using three well-shaped CeO2 catalysts, nanorod, nanocube and octahedron, which are packed with different crystal planes. In situ Fourier Transform Infrared Spectroscopy（FTIR） is employed to probe each reaction step in the DMC synthesis. The number of –OH groups and the species of CO2 adsorptions on ceria surface have significant influence on the activity of ceria with different morphologies. Rod-ceria has favorable catalytic activity because of the large amount of –OH groups and the formation of bidentate carbonate species.

关键词： Dimethyl carbonate CeO2 -OH Bidentate carbonate Crystal planes

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SUSY Confinement

Communications in Theoretical Physics 2018年第8期69卷 175-178页

作者： shu-Min zhao Xue-Qian Li Department of Physics Hebei UniversityBaoding 071002China Department of Physics Nankai UniversityTianjin 300071China

In response to the present status that searching for SUSY particles has been unsuccessful, we propose a bold scenario that SUSY particles are confined inside hadrons with a required condition of PR = 1 in analog to the color confinement for quarks. The scenario seems to be able to reconcile the beautiful SUSY theory and non-observation at present experiments. On other aspects, some loopholes in the proposal emerge and require to be answered in the future research.

关键词： SUSY confinement