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Landslides susceptibility mapping in Guizhou province based on fuzzy theory

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Mining Science and Technology 2009年第3期19卷 399-404页

作者： WANG Wei-dong xie Cui-ming DU Xiang-gang School of Civil Engineering and Architecture Central South University Changsha Hunan 410075 China

The purpose of this study was to assess the susceptibility of landslides around the area of Guizhou province based on fuzzy *** first instance, slope, elevation, lithology, proximity to tectonic lines, proximity to drainage and annual precipitation were taken as independent, causal factors in this study.A landslide hazard evaluation factor system was established by classifying these factors into more subclasses according to some ***, a trapezoidal fuzzy number weighting(TFNW) approach was used to assess the importance of six causal factors to landslides in an ArcGIS ***, a landslide susceptibility map was created based on a weighted linear combination *** to this susceptibility map, the study area was classified into four categories of landslide susceptibility:low, moderate, high and very ***, in order to verify the results obtained, the susceptibility map and the landslide inventory map were combined in the *** addition, the weighting procedure showed that TFNW is an efficient method for weighting causal landslide factors.

关键词： landslides susceptibility mapping fuzzy theory GIS weighted linear combination

Two New Oplopanol Esters from Ligularia narynensis

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Chinese Chemical Letters 2006年第3期17卷 341-343页

作者： Xue GAO Tong SHEN Wei dong xie Zhong Jian JIA College of Chemistry and Engineering State Key Laboratory of Applied Organic Chemistry Lanzhou University Lanzhou 730000

Tow new oplopanol esters were isolated from the roots of Ligularia narynensis. Their structures were eluc idated by spectroscopic methods, especially 2D-NMR techniques.

关键词： Ligularia narynensis Compositae sesquiterpenoids oplopanol esters.

Time Dependence of Entropy Flux and Entropy Production of a Dissipative Dynamical System Driven by Non-Gaussian Noise

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Communications in Theoretical Physics 2008年第6期49卷 1561-1566页

作者： GUO Yong-Feng XU Wei LI dong-Xi xie Wen-Xian Department of Applied Mathematics Northwestern Polytechnical University Xi＇an 710072 China

A stochastic dissipative dynamical system driven by non-Gaussian noise is investigated. A general approximate Fokker-Planck equation of the system is derived through a path-integral approach. Based on the definition of Shannon＇s information entropy, the exact time dependence of entropy flux and entropy production of the system is calculated both in the absence and in the presence of non-equilibrium constraint. The present calculation can be used to interpret the interplay of the dissipative constant and non-Gaussian noise on the entropy flux and entropy production.

关键词： information entropy entropy flux and entropy production non-Gaussian noise Fokker-Planck equation

Numerical modeling of tidal currents,sediment transport and morphological evolution in Hangzhou Bay,China

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International Journal of Sediment Research 2013年第3期28卷 316-328页

作者： dong-feng xie Shu GAO Zheng-bing WANG Cun-hong PAN Zhejiang Institute of Hydraulics & Estuary Key Laboratory for Coast and Island Development Ministry of EducationNanjing University Chang Jiang Scholar State Key Laboratory of Estuarine and Coastal ResearchEast China Normal University Delft University of Technology Faculty of Civil Engineering and Geosciences

A 2D depth-averaged numerical model is set up to simulate the macro-scale hydrodynamic characteristics,sediment transport patterns and morphological evolution in Hangzhou Bay,a large macro-tidal estuary on the eastern coast of *** incorporating the shallow water equations,the suspended sediment transport equation and the mass-balance equation for sediment;short-term hydrodynamics,sediment transport and long-term morphological evolution for Hangzhou Bay are simulated and the underlying physical mechanisms are *** model reproduces the spatial distribution patterns of suspended sediment concentration(SSC) in Hangzhou Bay,characterized by three high SSC zones and two low SSC *** also correctly simulates the residual flow,the residual sediment transport and the sediment accumulation patterns in Hangzhou *** model results are in agreement with previous studies based on field *** residual flow and the residual sediment transport are landwards directed in the northern part of the bay and seawards directed in the southern *** accumulation takes place in most areas of the *** analysis revealed that the tide is flood-dominant in the northern part of the bay and ebb-dominant in the southern part of the *** strength of the flood-dominance increases landwards along the northern Hangzhoii *** turn sediment transport in Hangzhou Bay is controlled by this tidal asymmetry *** addition,the direction of tidal propagation in the East China Sea,the presence of the archipelago in the southeast and the funnel-shaped geometry of the bay,play important roles for the patterns of sediment transport and sediment accumulation respectively.

关键词： Hangzhou Bay Tidal currents Sediment dynamics Estuary Morphology Numerical modeling

A Wind Power Time Series Modeling Method Based on Stochastic Burgers Equation 36

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A Wind Power Time Series Modeling Method Based on Stochastic...

Configuration interaction calculations on the spectroscopic and transition properties of magnesium chloride

第36届中国控制会议

作者： xie dong Wu Jiang Song Feilong Liu Weisheng Ministry of Education Key Lab for Intelligent Networks and Network Security Xi’an Jiaotong University

ISBN: (纸本)9781538629185

With more wind power integrating into power grid,a lot of issues are caused by its uncertainty and *** order to analysis wind characters,this paper proposes a method to model wind *** method bases on stochastic Burgers *** turns wind power model from three dimension to one dimension in order to simplify the physical model and generate more wind speed data to improve *** uses Gaussian distribution to fit the *** uses the Park model to calculate the wake *** it turns the wind speed data to wind power ***,the scheme is applied to a 30-turbines case.

关键词： wind power stochastic Burgers equation Park model

来源： cnki会议评论

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Chinese Physics B 2018年第8期27卷 187-195页

作者： dong-lan Wu Cheng-quan Lin Yu-feng Wen An-dong xie Bing Yan College of Mathematical and Physical Sciences Jinggangshan UniversityJi＇an 343009China Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy Institute of Atomic and Molecular PhysicsJilin UniversityChangchun 130012China

The potential energy curves （PECs） of 14 A-S states for magnesium chloride （MgC1） have been calculated by using multi-reference configuration interaction method with Davidson correction （MRCI ＋ Q）. The core-valence correlation （CV）, scalar relativistic effect, and spin-orbit coupling （SOC） effect are considered in the electronic structure computations. The spectroscopic constants of X2∑＋ and A2П states have been obtained, which are in good agreement with the existing theoretical and experimental results. Furthermore, other higher electronic states are also characterized. The permanent dipole moments （PDMs） of A-S states and the spinorbit （SO） matrix elements between A-S states are also computed. The results indicate that the abrupt changes of PDMs and the SO matrix elements are attributed to the avoided crossing between the states with the same symmetry. The SOC effect is taken into account with Breit-Panli operator, which makes the 14 A-S states split into 30 Ωstates, and leads to a double-well potential of the Ω =（3）1/2 state. The energy splitting for the A2I-I is calculated to be 53.61 cm-1 and in good agreement with the experimental result 54.47 cm-1. The transition dipole moments （TDMs）, Franck-Condon factors （FCFs）, and the corresponding radiative lifetimes of the selected transitions from excited Ω states to the ground state X2∑＋ 1/2 have been reported. The computed radiative lifetimes tV1, of low-lying excitesΩ states are all on the order of 10 ns. Finally, the feasibility of laser cooling of MgC1 molecule has been analyzed.

关键词： MgC1 MRCI+Q spectroscopic and transition properties spin-orbit coupling

Polyvinylchloride surface modified with polymer brushes for reduced protein,cell and bacteria attachment

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Biosurface and Biotribology 2023年第4期9卷 187-198页

作者： Rashed Almousa dong xie Jiliang Li Gregory G.Anderson Weldon School of Biomedical Engineering Purdue UniversityWest LafayetteIndianaUSA Department of Medical Equipment Technology College of Applied Medical SciencesMajmaah UniversityAl-MajmaahSaudi Arabia Department of Biomedical Engineering Indiana University-Purdue University at IndianapolisIndianapolisIndianaUSA Department of Biology Purdue School of ScienceIndiana University-Purdue University at IndianapolisIndianapolisIndianaUSA

The objective of this study was to coat negatively charged polymer brushes by a covalent bond onto the surface of polyvinylchloride using a simple conventional surface free radical polymerisation *** coated surfaces were assessed with contact angle,protein adsorption,cell adhesion,and bacterial *** serum albumin and bovine fibrinogen were used for protein adsorption *** fibroblast(NIH-3T3)cells and Pseudomonas aeruginosa were used to assess surface *** show that the surface modified with all the attached polymers exhibited significantly reduced contact angle,protein adsorption,and cell as well as bacterial adhesion among which the negatively charged polymers showed extremely low values in all the *** negatively charged polymer shows its contact angle at 5°as compared to 70°for original *** bovine serum albumin,bovine fibrinogen,3T3 adhesion,and *** adhesion were 93%,84%,92%,and 92%lower than the original PVC,***,the polyvinylchloride surface coated with negatively charged polymer brushes exhibited a hydrogel-like *** results indicate that coating a polyvinylchloride surface with acrylic acids using a simple surface-initiated free radical polymerisation and then converting those to negatively charged salts can be an effective and efficient route for fouling-resistant applications.

关键词： polymer surface

Hydrophilic polymer-coated PVC surface for reduced cell and bacterial adhesions

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Biosurface and Biotribology 2022年第1期8卷 34-43页

作者： Rashed Almousa Xin Wen Sungsoo Na Gregory Anderson dong xie Weldon School of Biomedical Engineering Purdue UniversityWest LafayetteIndianaUSA Department of Medical Equipment Technology College of Applied Medical ScienceMajmaah UniversityAlmajmaahSaudi Arabia Department of Biomedical Engineering Purdue School of Engineering and TechnologyIndiana University-Purdue University at IndianapolisIndianapolisIndianaUSA Department of Biology Purdue School of ScienceIndiana University-Purdue University at IndianapolisIndianapolisIndianaUSA

Hydrophilic polymers are very useful in biomedical *** this study,biocom-patible polyethylene glycol(PEG)and polyvinylpyrrolidone(PVP)polymers end-capped with succinimidyl groups were either modified or synthesised and attached to poly-vinylchloride *** modified surfaces were evaluated with cell adhesion and bacterial adhesion.3T3 mouse fibroblast cells and three bacteria species were used to evaluate surface adhesion *** showed that the modified surface exhibited significantly reduced 3T3 cell adhesion with a 50%-69%decrease for PEG and a 64%-81%for PVP,as compared to unmodified *** modified surface also showed significantly reduced bacterial attachment with 22%-78%,18%-76%and 20%-75%decrease for PEG and 22%-76%,18%-76%and 20%-73%for PVP to Staphy-lococcus aureus,Escherichia coli and Pseudomonas aeruginosa,respectively,as compared to unmodified *** seems that an appropriate chain length or molecular weight(neither the longest nor the shortest chain length)determines the lowest cell and bacterial adhesion in terms of *** the other hand,a mixture of polymers with different chain lengths exhibited the lowest cell and bacterial adhesion in terms of PVP.

关键词： adhesion bacterial viability polymer polyvinylchloride surface coating

Polyurethane coated with polyvinylpyrrolidones via triazole links for enhanced surface fouling resistance

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Biosurface and Biotribology 2021年第4期7卷 219-227页

作者： Xin Wen Rashed Almousa Sungsoo Na Gregory GAnderson dong xie Department of Biomedical Engineering Purdue School of Engineering and TechnologyIndianapolisIndianaUSA Department of Medical Equipment Technology College of Applied Medical ScienceMajmaah UniversityRiyadhSaudi Arabia Department of Biology Purdue School of ScienceIUPUIIndianapolisIndianaUSA

Surfaces with hydrophilic and antimicrobial properties are very attractive for cardio-vascular device-associated *** aim of this study was to prepare and coat a hydrophilic polymer containing a functional group capable of forming triazole functionality onto the surface of polyurethane(PU).The modified surfaces were assessed with cell adhesion,bacterial adhesion and bacterial *** fibroblast cells(NIH-3T3)and three bacterial species were used for *** results showed that the modified surface not only exhibited a significant reduction in cell adhesion with a 25%-59%decrease to mouse fibroblast but also showed a sig-nificant reduction in bacterial attachment with 26%-67%,24%-61%and 23%-57%decrease to Staphylococcus aureus,Escherichia coli and Pseudomonas aeruginosa,respectively,as compared with original ***,the polymer-modified surface exhibited a significant antibacterial function by inhibiting bacterial growth with reduction of 49%-84%,44%-79%and 53%-79%to ***,*** and ***-ginosa,respectively,as compared with original *** results indicate that covalent polymer attachment enhanced the antibacterial and antifouling properties of the PU surface.

关键词： bacterial adhesion and inhibition cell adhesion polymer coating polyurethane