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An Improved Model of the Jovian Magnetosphere

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Chinese Physics Letters 2014年第3期31卷 184-186页

作者： lu Bin CHEN Chu-xin Key Laboratory of Geospace Environment Department of Geophysics and Planetary Sciences School of Earth and Space Sciences University of Science and Technology of China Hefei 230026

The Jovian magnetosphere is modulated by the solar wind and centrifugal force. The configuration of the magnetic field in the previous model of the magnetosphere including the centrifugal force is consistent with the observations at low magnetic latitude （Λ〈50°）, while there is a substantial difference between the results of the model and the observations at high magnetic latitude （Λ≥50°）, especially in the distant magnetotail. Based on the previous model, a new configuration of the Jovian magnetosphere in the night side is suggested by a three-step transformation in this study. The new magnetosphere obtained by the transformation method is flattened in the z-direction and stretched in the x-direction in distant magnetotail, which agree with general knowledge.

关键词： JUPITER (Planet) MAGNETOSPHERE RESEARCH SOLAR wind CENTRIFUGAL force PHYSICS research

Symmetry Breaking Ground States of Bose-Einstein Condensates in 1D Double Square Well and Optical Lattice Well

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Communications in Theoretical Physics 2005年第5期43卷 814-818页

作者： YUANQing-xin DINGGuo-hui DepartmentofPhysics ShanghaiJiaoTongUniversityShanghai200240China

We investigate the phenomena of symmetry breaking and phase transition in theground state of Bose-Einstein condensates (BECs) trapped in a double square well and in an opticallattice well, respectively. By using standing-wave expansion method, we present symmetric andasymmetric ground state solutions of nonlinear Schroedinger equation (NLSE) with a symmetric doublesquare well potential for attractive nonlinearity. In particular, we study the ground state wavefunction's properties by changing the depth of potential and atomic interactions (here we restrictourselves to the attractive regime). By using the Fourier grid Hamiltonian method, we also reveal aphase transition of BECs trapped in one-dimensional optical lattice potential.

关键词： Bose-Einstein condensates symmetry breaking state phase transition

Scenario Prediction and Analysis of Urban Growth Using SLEUTH Model

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Pedosphere 2012年第2期22卷 206-216页

作者： FENG hui-hui LIU hui-Ping lu Ying School of Geography Beijing Normal UniversityBeijing 100875(China)

Scenario prediction was introduced to better understand urban dynamics and to support urban planning. Taking the Dongguan central urban area of the Pearl River Delta, China as an example, three urban development scenarios, historical trend (HT) scenario, forest protection (FP) scenario, and growth restriction (GR) scenario, were designed and transplanted into the SLEUTH model through the parameter self-modification method. The quantitative analysis results showed that the urban area would expand continuously from 2003 to 2030 under the HT scenario. More land resources would be saved under the GR scenario than FP scenario. Furthermore, the urban growth under the HT and FP scenarios would come to a steady state by 2020, while this deadline of the GR scenario would be postponed to 2025. The spatial pattern analysis using five spatial metrics, class area, number of patches, largest patch index, edge density, and contagion index, showed that under all the scenarios, the urban patches would become bigger and the form would become more compact, and the urban form under the GR scenario would be the smallest and most heterogeneous. These demonstrated that the GR scenario was more effective in meeting the goal of land protection and sustainable development for the study area.

关键词： central urban area land protection land resources spatial metrics sustainable development

Global structure of spectra of periodic non-Hermitian Jacobi operators

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Science China Mathematics 2024年第12期67卷 2753-2770页

作者： hui lu Jiangong You School of Mathematics Nanjing Audit UniversityNanjing 211815China Chern Institute of Mathematics and LPMC Nankai UniversityTianjin 300071China

We give global structure of spectra of periodic non-Hermitian Jacobi operators by the discriminant and its stationary points. We also give necessary and sufficient conditions for real spectra and single interval spectra.

关键词： periodic Jacobi operator non-Hermitian operator global structure real spectra

Simplified theoretical analysis and numerical study on the dynamic behavior of FCP under blast loads

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Frontiers of Structural and Civil Engineering 2020年第4期14卷 983-997页

作者： Chunfeng ZHAO xin YE Avinash GAUTAM xin lu YLMO Anhui Key Laboratory of Civil Engineering Structures and Materials Hefei University of TechnologyHefei 230009China State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of TechnologyDalian 116024.China School of Civil Engineering Hefei University of TechnologyHefei 230009China Deparment of Civil and Environmental Enginering University of HoustonHoustonTX 77024USA

Precast concrete structures have developed rapidly in the last decades due to the advantages of better quality,non-pollution and fast construction with respect to conventional cast-in-place *** the present study,a theoretical model and nonlinear 3D model are developed and established to assess the dynamic behavior of precast concrete slabs under blast *** first,the 3D model is validated by an experiment performed by other *** verified model is adopted to investigate the blast performance of fabricated concrete panels(FCPs)in terms of parameters of the explosive charge,panel thickness,and reinforcement ***,a simplified theoretical model of the FCP under blast load is developed to predict the maximum *** is indicated that the theoretical model can precisely predict the maximum displacement of FCP under blast *** results show that the failure modes of the panels varied from bending failure to shear failure with the mass of TNT *** thickness of the panel,reinforcement ratio,and explosive charges have significant effects on the anti-blast capacity of the FCPs.

关键词： precast structure fabricated concrete panel blast resistance theory model empirical equation

Diagnostic efficacy of the Japan Narrow-band-imaging Expert Team and Pit pattern classifications for colorectal lesions: A meta-analysis

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World Journal of Gastroenterology 2020年第40期26卷 6279-6294页

作者： Yu Zhang hui-Yan Chen Xiao-lu Zhou Wen-Sheng Pan xin-xin Zhou Hang-Hai Pan Department of Gastroenterology Zhejiang Provincial People’s HospitalPeople’s Hospital of Hangzhou Medical CollegeHangzhou 310014Zhejiang ProvinceChina School of Laboratory Medicine and Life Sciences Wenzhou Medical UniversityWenzhou 325035Zhejiang ProvinceChina Department of Medical College The Medical College of Qingdao UniversityQingdao 266071Shandong ProvinceChina Department of Gastroenterology The First Affiliated HospitalZhejiang UniversityHangzhou 310003Zhejiang ProvinceChina

BACKGROUND Pit pattern classification using magnifying chromoendoscopy is the established method for diagnosing colorectal lesions. The Japan Narrow-band-imaging(NBI) Expert Team(JNET) classification is a novel NBI magnifying endoscopic classification that focuses on the vessel, and surface *** To determine the diagnostic efficacy of each category of the JNET and Pit pattern classifications for colorectal *** A systematic literature search was performed using PubMed, Embase, the Cochrane Library, and Web of Science databases. The pooled sensitivity, specificity, diagnostic odds ratio, and area under the summary receiver operating characteristic curve of each category of the JNET and Pit pattern classifications were *** A total of 19227 colorectal lesions in 31 studies were included. The diagnostic performance of the JNET classification was equivalent to the Pit pattern classification in each corresponding category. The pooled sensitivity, specificity,and area under the curve(AUC) for each category of the JNET classification were as follows: 0.73(95%CI: 0.55-0.85), 0.99(95%CI: 0.97-1.00), and 0.97(95%CI: 0.95-0.98), respectively, for Type 1;0.88(95%CI: 0.78-0.94), 0.72(95%CI: 0.64-0.79), and 0.84(95%CI: 0.81-0.87), respectively, for Type 2 A;0.56(95%CI: 0.47-0.64), 0.91(95%CI: 0.79-0.96), and 0.72(95%CI: 0.68-0.76), respectively, for Type 2 B;0.51(95%CI: 0.42-0.61), 1.00(95%CI: 1.00-1.00), and 0.90(95%CI: 0.87-0.93), respectively, for Type *** This meta-analysis suggests that the diagnostic efficacy of the JNET classification may be equivalent to that of the Pit pattern classification. However, due to its simpler and clearer clinical application, the JNET classification should be promoted for the classification of colorectal lesions, and to guide the treatment strategy.

关键词： Colorectal neoplasms Colonoscopy Chromoendoscopy Japan Narrow-band-imaging Expert Team Pit pattern Meta-analysis

Activity coefficients of NiO and CoO in CaO–Al_2O_3–SiO_2 slag and their application to the recycling of Ni–Co–Fe-based end-of-life superalloys via remelting

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International Journal of Minerals,Metallurgy and Materials 2017年第1期24卷 25-36页

作者： xin lu Takahiro Miki Tetsuya Nagasaka Graduate School of Engineering Tohoku University

To design optimal pyrometallurgical processes for nickel and cobalt recycling, and more particularly for the end-of-life process of Ni-Co-Fe-based end-of-life（EoL） superalloys, knowledge of their activity coefficients in slags is essential. In this study, the activity coefficients of NiO and CoO in CaO-Al_2O_3-SiO_2 slag, a candidate slag used for the EoL superalloy remelting process, were measured using gas/slag/metal equilibrium experiments. These activity coefficients were then used to consider the recycling efficiency of nickel and cobalt by remelting EoL superalloys using CaO-Al_2O_3-SiO_2 slag. The activity coefficients of NiO and CoO in CaO-Al_2O_3-SiO_2 slag both show a positive deviation from Raoult＇s law, with values that vary from 1 to 5 depending on the change in basicity. The activity coefficients of NiO and CoO peak in the slag with a composition near B =（%CaO）/（%SiO_2） = 1, where B is the basicity. We observed that controlling the slag composition at approximately B = 1 effectively reduces the cobalt and nickel oxidation losses and promotes the oxidation removal of iron during the remelting process of EoL superalloys.

关键词： recycling nickel cobalt end-of-life superalloys activity coefficients remelting slag

Effect of stearic acid on the morphological and structural evolution of mechanically milled Nb-based powder

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International Journal of Minerals,Metallurgy and Materials 2012年第11期19卷 1052-1057页

作者： De-zhi Zhang Xuan-hui Qu Ming-li Qin Lin Zhang xin lu State Key Laboratory for Advanced Metals and Materials School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China

Nb-based powder was fabricated via mechanical grinding. The influence of stearic acid on the grinding process was studied. The slructural evolution and morphological evolution of the milled powder were characterized by X-ray diffraction （XRD）, scanning electron mi- croscopy （SEM）, and energy dispersive spectroscopy （EDS） analysis. It is indicated that an appropriate amount of stearic acid accelerates the particle refinement process and favors the production of superfine Nb-based particles with good dispersivity and high activity. However, an inappropriate amount of stearic acid has an adverse effect on the refinement process.

关键词： niobium alloys powders stearic acid grinding morphology microstructural evolution

Type 2 diabetic patients with non-alcoholic fatty liver disease exhibit significant haemorheological abnormalities

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Frontiers of Medicine 2011年第3期5卷 288-293页

作者： hui Dong Fu’er lu Nan Wang xin Zou Jingjing Rao Institute of Integrative Traditional and Western Medicine Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Department of Radiology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China

Haemorheological abnormalities have been described in diabetes mellitus,as well as in non-alcoholic fatty liver disease(NAFLD).However,the relationship between the changes in liver fat content and haemorheology is *** current study aims to show the correlation between haemorheological parameters and intrahepatic lipid content(IHLC)in patients with type 2 *** serum biochemical markers,such as fasting plasma glucose(FPG),haemoglobin A1c(HbA1c),liver enzymes,lipid profiles,and haemorheological properties,were *** was quantified using proton magnetic resonance spectroscopy(1 H-MRS)scanning of the liver.A significant correlation was observed between IHLC and whole blood viscosity at high,middle,and low shear *** also positively correlated with haematocrit,the reduced whole blood viscosity at low and middle shear rates,and the erythrocyte aggregation *** patients with NAFLD exhibited significant haemorheological abnormalities compared with patients without *** summary,haemorheological disorders are linked to non-alcoholic fatty liver in type 2 diabetes.

关键词： diabetes mellitus,type 2 haemorheology non-alcoholic fatty liver disease