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Estimating the properties of weathered bedrock and pile-rock interaction from the geological strength index

Journal of Mountain Science 2018年第8期15卷 1757-1776页

作者： ZHOU chun-mei shao Wei yin Kun-long YANG Zong-ji School of Civil Engineering and architecture Wuhan Institute of Technology Key laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environment Change/Collaborative Innovation Centre on Forecast and Evaluation of Meteorological Disasters/School of Hydrology and Water Resources Nanjing University of Information Science and Technology Faculty of Engineering China University of Geosciences Key Laboratory of Mountain Hazards and Surface Processes Institute of Mountain Hazards and Environment Chinese Academy of Sciences

The effect of variable rock mass properties on pile-rock interaction poses a great challenge to the design of stabilizing piles and numerical analysis of pile-rock interaction. The paper presents a novel method to estimate the properties of weathered bedrock, which can be applied to routine design of landslide-stabilizing piles for collivial landslides. The Ercengyan landslide located in the Three Gorges Reservoir, China, is the area of interest for this study. A geological investigation and triaxial tests were conducted to estimate the basic parameters, including Geological Strength Index(GSI), uniaxial compressive strength σ_(ci) and Hoek-Brown constant m_i of intact bedrock in the study area. Hoek-Brown criterion was used to estimate mechanical properties of the weathered rock, including elastic modulus E_m, cohesion c, friction angle Φ, and normal ultimate lateral resistance p_(max). A parametric study was performed to evaluate the effect of parameterizations of GSI, σ_(ci) and m_i on the bedrock properties and p-y curves. The estimated rock mass properties were used with PLAXIS 2D software to simulate pile-rock interaction. Effect of GSI on stress at the pile-rock interface and in the rock, pile bending moment, pile shear force, and p-y curve were analysed.

关键词： Landslide Stabilizing pile Weathered rock Pile-rock interaction Geological strength index

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Effects of mild intrauterine hypoperfusion in the second trimester on memory and learning function in rat offspring

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Neural Regeneration Research 2020年第11期15卷 2082-2088页

作者： shao-Wei yin Yuan Wang Yi-Lin Meng Cai-Xia Liu Department of Gynecology and Obstetrics Shengjing Hospital of China Medical UniversityShenyangLiaoning ProvinceChina Key Laboratory of Maternal-Fetal Medicine of Liaoning Province ShenyangLiaoning ProvinceChina Department of Anesthesiology Shengjing Hospital of China Medical UniversityShenyangLiaoning ProvinceChina

Mild intrauterine hypoperfusion(MIUH)is a serious pathological event that affects the growth and development of fetuses and *** can lead to growth restriction,low birth weight,neurodevelopmental disorders,and other adverse clinical *** study the effects of MIUH on learning and memory function in offspring,a model of MIUH was established by placing a coil(length 2.5 mm,diameter 0.24 mm)on the uterine artery and ovarian uterine artery of Sprague-Dawley rats in the second trimester of pregnancy(day 17).Next,120 mg/kg lithium chloride(the MIUH+Li group)or normal saline(the MIUH group)was injected intraperitoneally into these *** addition,120 mg/kg lithium chloride(the Li group)or normal saline(the SHAM group)was injected intraperitoneally into pregnant rats without coil *** Morris water maze was used to detect changes in learning and memory ability in the offspring at 4 weeks after *** the MIUH group,the escape latency and journey length before reaching the platform were both increased,and the number of times that the platform was crossed and the activity time in the target quadrant within 90 seconds were both decreased compared with the SHAM *** double staining and western blot assays demonstrated that hippocampal nestin and Ki67(both cell-proliferation-related proteins)expression was significantly downregulated in the MIUH group compared with the SHAM ***,western blot assays were conducted to investigate changes in related signaling pathway proteins in the brains of offspring rats,and revealed that glycogen synthase kinase 3β(GSK3β)expression was upregulated andβ-catenin expression was downregulated in the MIUH group compared with the SHAM *** addition,compared with the MIUH group,the expression levels of p-GSK3βandβ-catenin were upregulated in the MIUH+Li *** results suggest that MIUH may affect learning and memory function in rat offspring by regulating the GSK3βsignaling pathway.T

关键词： developmental neurobiology glycogen synthase kinase 3 intrauterine learning lithium memory offspring placenta diseases signal pathways β-catenin

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Carbon Dots Promote the Performance of Anodized Nickel Passivation Film on Ethanol Oxidation by Enhancing Oxidation of the Intermediate

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Chinese Journal of Chemistry 2021年第5期39卷 1199-1204页

作者： Yandi Shi Fan Liao Wenxiang Zhu Huixian Shi Kui yin Mingwang shao Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Bosed Functional Materials&DevicesJoint International Research Laboratory of Carbon-Based Functional Materials and DevicesSoochow University199 Ren'ai RoadSuzhouJiangsu 215123China

Ethanol is considered a better fuel than methanol in direct alcohol fuel cells because of the high energy density and low *** with noble metal catalysts,nickel-based catalysts are much cheaper in ***,present nickel-based catalysts still surfer from some disadvantages such as low activity and high *** this paper;we show a new and high efficient nickel-based catalyst for ethanol oxidation.A layer of anodized nickel passivation film(Ni-APF)was formed on the surface of nickel sheet by anodic oxidation method with carbon dots(CDs)as *** the current density of 110 mA·cm^(-2),the potential for Ni-APF/CDs was only 0.541 V(***/AgCI),which was 18.8% lower than that of *** overpotential could reduce electrode thermal loss and increase output ***-APF/CDs showed 144.4 mA·cm^(-2) peak current density at peak potential 0.662 V(***/AgCI),which was 31% higher than that of Ni-APF(110.3 mA·cm^(-2)).In this system,CDs mainly function in the increase of charge-transfer capacity and the promotion oxidation of carbonaceous intermediates.

关键词： Electrochemistry Heterogeneous catalysis Nickel Ethanol oxidation reaction Carbon dots

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Remediation of Cu and As contaminated water and soil utilizing biochar supported layered double hydroxide:Mechanisms and soil environment altering

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Journal of Environmental Sciences 2023年第4期126卷 275-286页

作者： Pengling shao Hua yin yingchao Li Yuhao Cai Caiya Yan Yibo Yuan Zhi Dang School of Environment and Energy South China University of TechnologyGuangzhou 510006China Key Laboratory of Ministry of Education on Pollution Control and Ecosystem Restoration in Industry Clusters Guangzhou 510006China Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling Guangzhou 510006China

Preparing materials for simultaneous remediation of anionic and cationic heavy metals contamination has always been the focus of research. Herein a biochar supported FeMnMg layered double hydroxide(LDH) composites(LB) for simultaneous remediation of copper and arsenic contamination in water and soil has been assembled by a facile co-precipitation approach. Both adsorption isotherm and kinetics studies of heavy metals removal by LB were applied to look into the adsorption performance of adsorbents in water. Moreover, the adsorption mechanisms of Cu and As by LB were investigated, showing that Cu in aqueous solution was removed by the isomorphic substitution, precipitation and electrostatic adsorption while As was removed by complexation. In addition, the availability of Cu and As in the soil incubation experiments was reduced by 35.54%–63.00% and 8.39%–29.04%, respectively by using LB. Meanwhile, the addition of LB increased the activities of urease and sucrase by 93.78%–374.35% and 84.35%–520.04%, respectively, of which 1% of the dosage was the best. A phenomenon was found that the richness and structure of microbial community became vigorous within 1% dosage of LB, which indirectly enhanced the passivation and stabilization of heavy metals. These results indicated that the soil environment was significantly improved by LB. This research demonstrates that LB would be an imaginably forceful material for the remediation of anionic and cationic heavy metals in contaminated water and soil.

关键词： Heavy metal Biochar supported layered double hydroxide composite Adsorption mechanism Soil remediation Microbial community

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A White Emitting Organic Diode with a Doped Blocking Layer

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Chinese Physics Letters 2000年第7期17卷 534-536页

作者： ZHANG Zhi-lin JIANG Xue-yin XU shao-hong Department of Materials Science Shanghai UniversityShanghai 201800

A novel white emitting organic diode has been simply realized by inserting a doped hole-blocking layer between the hole transporting layer(HTL)and the electron transporting layer(ETL).The structure of this device is ITO/CuPc/NPB/blocking layer:rubrene/Alq/*** phthalocyanine(CuPc)was used as a buffer layer,N,N'-bis-(1-naphthy1)-N,N'-DIPHENYL-1'-biphenyl-4,4'-diamine(NPB)as te HTL,and trimer of complex(Alq) as *** tin oxide and MgAg were the anode and cathode,*** emission spectrum of this device covers a wide range of visible region and can be sensitively adjusted by the concentration of *** white emission with the CIE(Commission International de l'Eclairage)color coordinates x=0.31,y=0.32,a maximum luminance of 8635 cd/m2,and the luminous efficiency 1.39lm/W at the luminance of 100 cd/m2 were obtained in the device with 1.5% rebrene concentration in TPBi.

关键词： luminous layer white

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Determination of Trace Elements in Edible Nuts in the Beijing Market by ICP-MS

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Biomedical and Environmental Sciences 2015年第6期28卷 449-454页

作者： yin Liang Liang TIAN Qing shao Xian Zhang KONG Xiang yin JI Yan Qin National Institute for Radiological Protection Chinese Center for Disease Control and Prevention

Nuts have received increased attention from the public in recent years as important sources of some essential elements, and information on the levels of elements in edible nuts is useful to consumers. Determination of the elemental distributions in nuts is not only necessary in evaluating the total dietary intake of the essential elements, but also useful in detecting heavy metal contamination in food. The aim of this study was to determine the mineral contents in edible nuts, and to assess the food safety of nuts in the Beijing market. Levels of Li, Cr, Mn, Co, Cu, Zn, As, Se, Rb, Sr, Mo, Cd, Cs, Ba, Pb, Th, and U in 11 types of edible nuts and seeds （macadamia nuts, lotus nuts, pistachios, sunflower seeds, pine nuts, almonds, walnuts, chestnuts, hazelnuts, cashews, and ginkgo nuts） as well as raisins were determined by inductively coupled plasma mass spectrometry （ICP-MS）. The accuracy of the method was validated using standard reference materials GBWlO014 （cabbage） and GBWlO016 （tea）. Our results provide useful information for evaluating the levels of trace elements in edible nuts in the Beijing market, will be helpful for improving food safety, and will aid in better protecting consumer interests.

关键词： edible contamination detecting intake evaluating dietary Brazil digestion representing recognize

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Antithrombotic effects of the effective components group of Xiaoshuantongluo formula in vivo and in vitro

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Chinese Journal of Natural Medicines 2015年第2期13卷 99-107页

作者： ZHAO Yan chu Xiao PANG Xiao-Bin WANG shao-Hua DU Guan-Hua Qingdao Municipal Hospital Affiliated Hospital of Medical College Qingdao University Qingdao University Pharmaceutical Institute Henan University National Centre for Pharmaceutical Screening Institute of Materia Medica Chinese Academy of Medical Science and Peking Union Medical College

The present study was designed to investigate the antithrombotic effects and underlying mechanisms of the effective components group(ECG) of Xiaoshuantongluo recipe(XECG) and to further verify the rationality and feasibility of ECG-guided methodology in traditional Chinese medicine(TCM) research. The arterial thrombosis model induced by ferric chloride(FeC l3) oxidation and the venous thrombosis model induced by inferior vena cava ligation were established to evaluate the antithrombotic potential of XECG. Our results indicated that XECG significantly prolonged the time to occlusion, activated partial thromboplastin time(APTT), and prothrombin time(PT), and markedly inhibited adenosine diphosphate(ADP)-induced platelet aggregation in the 20% Fe Cl3-induced arterial thrombosis model. The superoxide dismutase(SOD) activity was significantly increased and the levels of malondialdehyde(MDA) and nitric oxide(NO) were dramatically decreased in the plasma of arterial thrombosis rats after XECG treatment for 12 days. Furthermore, XECG markedly reduced the weight of thrombus formed by inferior vena cava ligation. Additionally, XECG exhibited 2,2-diphenyl-1-picrylhydrazyl(DPPH) free radical scavenging activity and protective effect on mitochondrial lipid peroxidation. In summary, XECG played an important role in the prevention of thrombosis through interacting with multiple targets, including inhibition of platelet aggregation and coagulation and repression of oxidative stress. The ECG-guided methodology was validated as a feasible tool in TCM research.

关键词： Traditional Chinese medicine Effective components group Thrombosis Platelet aggregation Oxidative stress Radical scavenging

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Heat Flux Through Slag Film and Its Crystallization Behavior

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Journal of Iron and Steel Research International 2008年第4期15卷 7-11,20页

作者： TANG Ping XU chu-shao WEN Guang-hua ZHAO Yan-hong QI Xin College of Materials Science and Engineering Chongqing University Chongqing 400044 China

An experimental apparatus for simulating copper mold is used to quantify the heat flux through the slag film and to obtain a solid slag for further determining its crystallization behavior. The result indicates that both the chemical composition of the mold powder and the cooling rate have an important influence on the heat flux through the slag film. With increasing the binary basicity, the heat flux of slag film decreases at first, reaches the minimum at the basicity of 1.4, and then increases, indicating that the maximum binary basicity is about 1.4 for selecting ＂mild cooling＂ mold powder. The heat transfer through the slag film can be specified in terms of the crystalline ratio and the thickness of the slag film. Recrystallization of the solid slag occurs and must be considered as an important factor that may influence the heat transfer through the solid slag layer.

关键词： continuous casting mold powder slag film heat flux crystallization

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Heterogeneous Catalytic Ozonization of Sulfosalicylic Acid

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Chinese Chemical Letters 2002年第6期13卷 579-582页

作者： shao Ping TONG Wen Hua LENG Jiang Qing ZHANG chu Nan CAO Department of Chemistry Zhejiang UniversityHangzhou 310027

This paper describes the potential of heterogeneous catalytic ozonization of sulfo-salicylic acid (SSal). It was found that catalytic ozonization in the presence of Mn-Zr-O (a modified manganese dioxide supported on silica gel) had significantly enhanced the removal rate (72%) of total organic carbon (TOC) compared with that of ozonization alone (19%). The efficient removal rate of TOC was probably due to increasing the adsorption ability of catalyst and accelerating decomposition of ozone to produce more powerful oxidants than ozone. .

关键词： Ozone catalytic ozonization total organic carbon sulfosalicylic acid.

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Robust Sliding-Mode Position/Force Set-Point Control of Underactuated Constrained manipulator 36

Robust Sliding-Mode Position/Force Set-Point Control of Unde...

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第36届中国控制会议

作者： Zhulong shao Shurong Li Huaiqiang yin College of Information and Control Engineering China University of Petroleum （East China）

ISBN: (纸本)9781538629185

In this paper, a robust position/force set-point control strategy based on a sliding-mode is designed for constrained underactuated manipulator. At first, the reduced underactuated position/force dynamic model is obtained by considering a coordination transformation. Then, a controller based on a sliding-mode is designed to drive the closed-loop system states to reach the adopted sliding model surface. Considering the parametric uncertainties of the manipulator, a robust control strategy is applied to bound compensation. Furthermore, we can obtain a global asymptotic stability result for the positions error in the Lyapunov sense and the error of constraint force is bounded with a controllable bound. Finally, the simulation results of a three-DOF manipulator system illustrate the validity and the feasibility of the proposed method in this paper.

关键词： Underactuated manipulator Position/Force control Sliding-Mode control

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