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Stability and deformation of Xiaozhuang landslide: A large-scale creeping landslide in Gansu, China

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Journal of Mountain Science 2022年第3期19卷 756-770页

作者： ZHANG ze-lin WANG tao China Agricultural University Beijing 100083China Institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China

Information about the long-term spatiotemporal evolution of landslides can improve our understanding of the landslide development process and can help prevent landslide *** paper describes the Xiaozhuang landslide triggered by a historical earthquake and rainfall in Tianshui,Northwest *** landslide is dominated by rotational-sliding *** new failures and many fissures formed in the landslide area as a result of the 2013 Ms 6.6 Minxian earthquake and ***,field investigations,borehole drilling,geotechnical laboratory tests,and numerical calculations were conducted to study the mechanism of the landslide and to forecast its stability.A triaxial creep test of the slip soil indicates that the axial deformation of the mudstone increases with increasing water *** simulations suggest that failure is prone to occur within the deep part of the landslide under earthquake *** the input seismic acceleration exceeds 0.2 g,the landslide will become ***,the horizontal peak ground acceleration near the surface of the landslide is greater than that at *** a strong earthquake,the unstable regions are primarily located in the middle of the landslide and at its *** the rainfall intensity rate is 200 mm/d,the factor of safety is 1.319 and a dangerous zone appears in the lower and middle parts of the landslide.

关键词： Landslide Stability Rainfall and earthquake Numerical simulation Acceleration Displacement

Hall Polynomials for Affine Quivers of Type _m(m≥1)

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Acta Mathematica Sinica,English Series 2008年第3期24卷 387-396页

作者： tao xie Department of Mathematics Hubei Normal University Huangshi 435002 P. R. China

It is well known that Hall polynomials as structural coefficients play an important role in the structure of Lie algebras and quantum groups. By using the properties of representation categories of affine quivers, the task of computing Hall polynomials for affine quivers can be reduced to counting the numbers of solutions of some matrix equations. This method has been applied to obtain Hall polynomials for indecomposable representations of quivers of type Am（m≥1）

关键词： affine quiver preprojective module preinjective module regular module Hall polynomial

Exact solution of the two-mode quantum Rabi model

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Communications in Theoretical Physics 2020年第6期72卷 57-64页

作者： Qiong-tao xie College of Physics and Electronic Engineering Hainan Normal UniversityHaikou 571158China

An analytical method is developed to study the two-mode quantum Rabi *** certain specific parameter conditions,especially for the resonant conditions,we obtain an infinite number of the exact solutions of the eigenfunctions and associated *** is shown that there exist new types of the exact energies which do not correspond to the *** analytical method may find applications in some related models.

关键词： exact solutions two-mode quantum Rabi model level-crossings

CSO CO(2–1) and Spitzer IRAC observations of a bipolar outflow in high-mass star-forming region IRAS 22506+5944

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Research in Astronomy and Astrophysics 2018年第2期18卷 73-82页

作者： ze-Qiang xie Ke-Ping Qiu School of Astronomy and Space Science Nanjing University Nanjing 210023 China Key Laboratory of modern Astronomy and Astrophysics (Nanjing University) Ministry of Education Nanjing 210023 China

We present Caltech Submillimeter Observatory CO （2-1） and Spitzer IRAC observations toward IRAS 22506＋5944, which is a 104 Lo massive star-forming region. The CO （2-1） maps show an east-west bipolar molecular outflow originating from the 3 mm dust continuum peak. The Spitzer IRAC color-composite image reveals a pair of bow-shaped tips which are prominent in excess 4.5 p.m emission and are located at the leading fronts of the bipolar outflow, providing compelling evidence for the existence of bow-shocks as the driving agents of the molecular outflow. By comparing our CO （2- 1） observations with previously published CO （1-0） data, we find that the CO （2-1）/（1-0） line ratio increases from low （-5 km s- 1） to moderate （- 8-12 km s- 1） velocities, and then decreases at higher velocities. This is qualitatively consistent with the scenario that the molecular outflow is driven by multiple bow-shocks. We also revisit the position-velocity diagram of the CO （1-0） data, and find two spur structures along the outflow axis, which are further evidence for the presence of multiple jet bow- shocks. Finally, power-law fittings to the mass spectrum of the outflow gives power law indexes more consistent with the jet bow-shock model than the wide-angle wind model.

关键词： ISM: jets and outflows - stars: formation - stars: massive -- stars: protostars

Enhanced CO2 Electrolysis with Metal-oxide Interface Structures

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Chinese Journal of Structural Chemistry 2021年第1期40卷 31-41,1页

作者： XU ze-Tong xie Kui College of Chemistry and Materials Science Fujian Normal UniversityFuzhou 350007China CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China

The ever-decreasing fossil fuels and the increasing greenhouse effect have caused substantial *** oxide electrolyser cell(SOEC)with La_(0.75)Sr_(0.25)Cr_(0.5 )Mn_(0.5)O_(3-δ)(LSCM)as a cathode was used for CO_(2) electrolysis to *** this work,the metal-oxide interface was constructed on the LSCM framework by in-situ exsolution and impregnation,and the uniform distribution of metal nanoparticles on the LSCM framework was confirmed by spectroscopy techniques and electron microscopy *** existence of three-phase boundary promoted the absorption and electrolysis of CO_(2).(La_(0.75) Sr_(0.25))0.9(Cr_(0.5 )Mn_(0.5))_(0.9)(Ni_(0.5) Cu_(0.5))_(0.1) O_(3-δ)(LSCMNC)showed the best electrolytic CO_(2) performance at 850℃and exhibited excellent electrocatalytic activity after 100 hours of long-term testing and 8 redox cycles.

关键词： solid oxide electrolyser cell LSCM metal nanoparticles CO_(2)electrolysis

Adsorption behaviour of Eu(Ⅲ) on natural bamboo fibres: effects of pH, humic acid, contact time, and temperature

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Nuclear Science and Techniques 2020年第1期31卷 32-41页

作者： tao Yu Jun Yang ze-Yang Wang Engineering Research Center of Nuclear Technology Application(East China University of Technology) Ministry of EducationNanchang 330013China School of Nuclear Science and Engineering East China University of TechnologyNanchang 330013China

To study the adsorption properties of organic functional groups in plant fibres and identify a highly efficient and affordable adsorbent for radioactive wastewater treatment,natural bamboo fibre(NBF)samples were prepared,and the adsorption properties of Eu(Ⅲ)on NBFs were studied under given experimental *** effects of the pH,solid-to-liquid ratio,background ions,humic acid,contact time,and temperature on the adsorption behaviour of Eu(Ⅲ)on NBFs were *** was greatly influenced by pH,and the adsorption curves presented two inflection points at pH≈7 and pH≈***,while the ionic strength presented a negative effect at pH*** adsorption on NBFs,the–OH,C–H,O–H,C–O,and C=O were the main adsorption *** occurring on the NBF surface caused the adsorption process to become increasingly difficult at pH>*** maximum adsorption capacity of NBFs was 147.6 mg/g at 308 K,and the adsorption could be described using the pseudo-second-order kinetic *** adsorption of Eu(Ⅲ)on NBFs was a spontaneous and endothermic process according to the thermodynamic parameters of the process,and the adsorption thermodynamics could be well described using the Freundlich adsorption ***,NBFs were determined to be an efficient,inexpensive,and easily disposable sewage treatment material.

关键词： Adsorption Eu(III) Natural bamboo fibre Organic functional group

CFD simulations of three-dimensional violent sloshing flows in tanks based on MPS and GPU

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Journal of Hydrodynamics 2020年第4期32卷 672-683页

作者： Feng-ze xie Wei-wen Zhao De-cheng Wan Computational Marine Hydrodynamics Lab(CMHL) School of Naval ArchitectureOcean and Civil EngineeringState Key Laboratory of Ocean EngineeringShanghai Jiao Tong UniversityShanghai 200240China

For violent sloshing,the flow field becomes complicated and 3-D effect is *** addition to the excitation direction,the wave can also propagate perpendicular to the excitation *** to the superposition of waves from different directions,the impact pressure imposed on the wall of the tank may *** this paper,our in-house solver MPSGPU-SJTU based on moving particle semi-implicit(MPS)method coupled with GPU techniques is employed for the liquid sloshing simulation,to study the factors leading to the 3-D ***,a series of sloshing simulations are carried out to validate the reliability of present ***,the sensitivity of 3-D effect against some parameters,such as excitation frequency,dimensions of the tank and filling ratio,is checked through numerical *** histories of pressure obtained by 2-D and 3-D simulations are compared to judge the occurrence of 3-D *** concludes that effects of those parameters are all significant.

关键词： Liquid sloshing 3-D effect sensitive parameters moving particle semi-implicit(MPS)method MPSGPU-SJTU solver

Hydraulic resistance of river ice jams

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Journal of Hydrodynamics 2019年第3期31卷 504-511页

作者： Lin Fan ze-yu Mao Hung tao Shen Department of Hydraulic Engineering Tsinghua University Beijing 100084 China Development Research Center of the Ministry of Water Resources Beijing 100036 China Department of Civil and Environmental Engineering Clarkson University Potsdam NY 13676 USA

The hydraulic resistance of the river ice jams consists of the resistances due to the seepage flow through the jam and the shear stress on the undersurface of the jam. Existing empirical formulations consider only the the undersurface resistance of the jam, and come up with relations between the jam resistance and the jam thickness with very slight theoretical basis. Based on the analysis of the seepage flow resistance and the flow resistance of the undersurface of the jam, it is shown that the resistance due to the seepage flow is a dominating part of the jam resistance, except for the portion of the jam where the thickness is very small. This analysis also shows that the total jam resistance can be approximated by a linear function of the jam thickness or the ratio of the jam thickness to the flow depth under the jam.

关键词： River ice hydraulic resistance ice jam friction factor Manning's coefficient

Numerical Simulations of Liquid-Solid Flows in A Vertical Pipe by MPS-DEM Coupling Method

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China Ocean Engineering 2022年第4期36卷 542-552页

作者： xie Feng-ze MENG Qing-jie WAN De-cheng Computational Marine Hydrodynamics Lab(CMHL) School of Naval ArchitectureOcean and Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240China Wuhan Second Ship Design and Research Institute Wuhan 430205China

In the process of deep-sea mining,the liquid-solid flows in the vertical transportation pipeline are very *** the present work,an in-house solver MPSDEM-SJTU based on the improved MPS and DEM is developed for the simulation of hydraulic ***,three examples including the multilayer cylinder collapse,the Poiseuille flow and two-phase dam-break are used to validate the precision of the DEM model,the pipe flow model and MPS-DEM coupling model,***,the hydraulic conveying with coarse particles in a vertical pipe is *** solid particle distribution is presented and investigated in ***,the coupling method is successfully applied for the simulation of the liquid-solid flows in a vertical pipe with rotating blades,which shows the stability of the solver under rotating boundary *** fully Lagrangian model is expected to be a new approach for analyzing hydraulic conveying.

关键词： liquid-solid flows MPS DEM vertical pipe rotating boundary conditions