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Undersea Buried Pipeline Reconstruction Based on the Level Set and Inverse Multiquadric Regularization Method

Journal of Ocean University of China 2022年第1期21卷 101-112页

作者： SHANG Wenjing xue wei XU Yidong MAKAROV Sergey B LI Yingsong College of Information and Communication Engineering Harbin Engineering UniversityHarbin 150001China Key Laboratory of Advanced Marine Communication and Information Technology Ministry of Industry and Information TechnologyHarbin 150001China Yantai Research Institute and Graduate School of Harbin Engineering University Yantai 264006China Institute of Physics Nanotechnology and TelecommunicationsHigher School of Applied Physics and Space TechnologiesPeter the Great St.Petersburg Polytechnic UniversitySt.Petersburg 195251Russia

The electric inversion technique reconstructs the subsurface medium distribution from acquired *** the basis of electric inversion,objects buried under the earth or seabed,such as pipelines and unexploded ordnance,are detected and located in a contactless ***,the process of accurately reconstructing the shape of the target object is challenging because electric inversion is a nonlinear and ill-posed *** this work,we present an inverse multiquadric(IMQ)regularization method based on the level set function for reconstructing buried *** the case of locating underwater objects,the unknown inversion area is split into two parts,the background and the pipeline with known *** geometry of the pipeline is represented based on the level set function for achieving a noiseless inversion *** obtain a binary image,the IMQ is used as the regularization term,which‘pushes’the level set function away from *** also provide an appropriate method to select the bandwidth and regularization parameters for the IMQ regularization term,resulting in reconstructed images with sharp *** simulation results and analysis show that the proposed method performs better than classical inversion methods.

关键词： inverse problems level set function inverse multiquadric regularization method buried pipeline

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Horticulture in a molecular age

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Molecular Horticulture 2021年第1期1卷 193-194页

作者： Su-Sheng Gan Hong-wei xue Plant Biology Section School of Integrative Plant ScienceCornell UniversityIthacaNY 14853USA Joint Centre for Single Cell Biology School of Agriculture and BiologyShanghai Jiao Tong UniversityShanghai 200240China

It is our great honor and pride to announce and celebrate the launch of Molecular Horticulture(MHort).On behalf of the distinguished Advisory Board and Editorial Board of the journal,we would like to warmly welcome you to visit the MHort webpage and read the first batch(and more to come)of articles of high quality and *** is this new journal needed?The word horticulture derives from two Latin terms,hortus(meaning“yard”or“garden”)and cultura(meaning“cultivation”),and Horticulture has been conventionally a practice-or application-oriented discipline.

关键词： culture journal behalf

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A PRESSURE-BASED ALGORITHM FOR CAVITATING FLOW COMPUTATIONS

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Journal of Hydrodynamics 2011年第1期23卷 42-47页

作者： ZHANG Ling-xin ZHAO wei-guo SHAO xue-ming Department of Mechanics State Key Laboratory of Fluid Power Transmission and Control Zhejiang UniversityHangzhou 310027 China

A pressure-based algorithm for the prediction of cavitating flows is *** algorithm employs a set of equations including the Navier-Stokes equations and a cavitation model explaining the phase change between liquid and vapor.A pressure-based method is used to construct the algorithm and the coupling between pressure and velocity is *** pressure correction equation is derived from a new continuity equation which employs a source term related to phase change rate instead of the material derivative of density Dρ/*** pressure-based algorithm allows for the computation of steady or unsteady,2-D or 3-D cavitating *** 2-D cases,flows around a flat-nose cylinder and around a NACA0015 hydrofoil,are simulated respectively,and the periodic cavitation behaviors associated with the re-entrant jets are *** algorithm shows good capability of computating time-dependent cavitating flows.

关键词： cavitating flow pressure-based algorithm cavitation model numerical simulation

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Preparation of Nano-titanium Dioxide in Propane/Air Diffusion Flame

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过程工程学报 2004年第Z1期4卷 509-514页

作者： ZHANG wei SUN xue XIE Hongyong School of Chemical Engineering Dalian University of Technology Dalian Liaoning 116012 China

Titanium dioxide (TiO2) nanoparticles were synthesized by the oxidation of titanium tetrachloride (TiCl4), in propane/air diffusion flame. The propane/air diffusion flame is generated using a multi-port diffusion type burner composed of 4 concentric tubes. Flow rates of TiCl4 and combustion gases such as air, industrial propane and carrier gas were chosen as key experimental variables for the control of the particle size and morphology. Effects of propane/air mole ratio and precursor flow rate on particle size, morphology, structure and carbon dots of titanium dioxide particles were studied.

关键词： flame CVD nanoparticles TiO2

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Creatine kinase in the diagnosis and prognostic prediction of amyotrophic lateral sclerosis:a retrospective case-control study

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Neural Regeneration Research 2021年第3期16卷 591-595页

作者： xue-Ping Chen Qian-Qian wei Ru-wei Ou Yan-Bing Hou Ling-Yu Zhang Xiao-Qin Yuan Yun-Qian Yao De-Sheng Jia Qian Zhang wei-xue Li Hui-Fang Shang Department of Neurology West China Hospital of Sichuan UniversityChengduSichuan ProvinceChina

Creatine kinase is a muscle enzyme that has been reported at various levels in different studies involving patients with amyotrophic lateral *** the present retrospective case-control study,we included 582 patients with amyotrophic lateral sclerosis and 582 age-and sexmatched healthy *** amyotrophic lateral sclerosis participants received treatment in the Department of Neurology,West China Hospital,China,between May 2008 and December *** creatine kinase levels in patients with amyotrophic lateral sclerosis were significantly higher than those in healthy *** analysis revealed that serum creatine kinase levels in men were higher than those in women in both amyotrophic lateral sclerosis patients and healthy *** with patients with bulbar-onset amyotrophic lateral sclerosis,patients with limb-onset amyotrophic lateral sclerosis had higher creatine kinase ***'s correlation analysis revealed that serum creatine kinase levels were not correlated with body mass index,Amyotrophic lateral Sclerosis Functional Rating ScaleRevised score,or progression *** adjusting for prognostic covariates,higher log creatine kinase values were correlated with higher overall survival in the amyotrophic lateral sclerosis *** also investigated the longitudinal changes in serum creatine kinase levels in 81 amyotrophic lateral sclerosis patients;serum creatine kinase levels were decreased at the second blood test,which was sampled at least 6 months after the first blood ***,our results suggest that serum creatine kinase levels can be used as an independent factor for predicting the prognosis of amyotrophic lateral sclerosis *** study received ethical approval from the Ethics Committee of West China Hospital,China(approval No.2015(236))on December 23,2015.

关键词： amyotrophic lateral sclerosis biomarker creatine kinase diagnosis epidemiological study prognosis serology survival

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Thermal-induced reversible ferroelastic phase transition in a new bromethyl-substituted molecular rotor

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Science China Chemistry 2015年第7期58卷 1137-1143页

作者： Bao-Ying Wang Chun-Ting He Bo Huang wei-Jian Xu wei xue Zi-Yi Du wei-Xiong Zhang Xiao-Ming Chen Key Laboratory of Bioinorganic and Synthetic Chemistry Ministry of Education School of Chemistry & Chemical Engineering Sun Yat-Sen University College of Chemistry & Chemical Engineering Gannan Normal University

A new bromethyl-substituted molecular rotor, [Cu（dabcoCH2Br）（H2O）Br3] （dabcoCH2Br＋=1-（2-bromethyl）-1,4-diazoniabi- cyclo[2.2.2]octane cation）, which belongs to a family of balomethyl-substituted molecular rotors, was synthesized and struc- turally characterized. The reversible phase transition at ca. 250 K was well established for this molecular rotor by thermal analyses, variable-temperature X-ray diffraction, and variable temperature dielectric measurements. The order-disorder trans- formation of the rotator part （dabco moiety） causes ferroelastic phase transition with an Aizu notation of mmmF2/m from high- temperature orthorhombic phase （Pbnm） to low-temperature monoclinic phase （P21/n）. More important, in reference to the density functional theory calculations and structural analyses, the key factors to tune the phase transition behaviors were dis- cussed in detail for this family of halomethyl-substituted molecular rotors.

关键词： ferroelastic phase transition molecular rotor confined space

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Ins（1,4,5）P3 Suppresses Protein Degradation in Plant Vacuoles by Regulating SNX-Mediated Protein Sorting

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Molecular Plant 2016年第10期9卷 1440-1443页

作者： Yu-Jia Chu Xu Chen Hong- wei xue National Key Laboratory of Plant Molecular Genetics CAS Center for Excellence in Molecular Plant Sciences Shanghai Institute of Plant Physiology and Ecology Chinese Academy of Sciences 300 Fenglin Road Shanghai 200032 China

Dear Editor, Protein degradation is an essential process for protein dynamics and the development of living organisms, and defective protein degradation can lead to abnormalities in protein accumulation and cell functions. In addition to the conserved proteasome- dependent pathway in both mammals and plants, the lytic vacuole-dependent pathway is crucial for protein degradation in plants （Cai et al., 2014）.

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Identification of QTLs for yield and yield components of barley under different growth conditions

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2010年第3期11卷 169-176页

作者： Da-wei xue Mei-xue ZHOU Xiao-qin ZHANG Song CHEN Kang wei Fan-rong ZENG Ying MAO Fei-bo WU Guo-ping ZHANG College of Life and Environment Sciences Hangzhou Normal University Hangzhou 310036 China Department of Agronomy Zhejiang University Hangzhou 310029 China Tasmanian Institute of Agricultural Research University of Tasmania Kings Meadows TAS 7249 Australia

Waterlogging is a major abiotic stress limiting barley (Hordeum vulgare L.) yield and its stability in areas with excessive *** of genomic regions influencing the response of yield and its components to waterlogging stress will enhance our understanding of the genetics of waterlogging tolerance and the development of more tolerant barley *** trait loci (QTLs) for grain yield and its components were identified using 156 doubled haploid (DH) lines derived from a cross between the cultivars Yerong (waterlogging-tolerant) and Franklin (waterlogging-sensitive) grown under different conditions (waterlogged and well drained).A total of 31 QTLs were identified for the measured characters from two experiments with two growth *** phenotypic variation explained by individual QTLs ranged from 4.74% to 55.34%.Several major QTLs determining kernel weight (KW),grains per spike (GS),spikes per plant (SP),spike length (SL) and grain yield (GY) were detected on the same region of chromosome 2H,indicating close linkage or pleiotropy of the gene(s) controlling these *** different QTLs were identified under waterlogging conditions,and thus different markers may have to be used in selecting cultivars suitable for high rainfall areas.

关键词： Barley (Hordeum vulgare L.) Waterlogging tolerance Yield Quantitative trait locus (QTL)

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Synthesis and Structural Characterization of a Ni(Ⅱ) Complex [Ni(H_2O)_4(4,4'-bipy)_2](hca)_2

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Chinese Journal of Structural Chemistry 2006年第11期25卷 1392-1396页

作者： ZHOU Qiu-Xuan XU Qing-Feng LU Jian-Mei XIA xue-wei Key Laboratory of Organic Synthesis of Jiangsu Province School of Chemistry and Chemical Engineering Suzhou University Suzhou 215123 China Jiangsu Polytechnic University Changzhou 213016 China

The reaction of Ni（CH3COO）2.6H2O, 4-hydroxycinnamic acid （Hhca） and 4,4＇-bipyridine （bipy） ligand in water-solution afforded a mononuclear complex [Ni（H2O）4（4,4＇-bipy）2]（hca）2 which was characterized by IR, elemental analysis, TGA and single-crystal X-ray diffraction. X-ray crystallography analysis reveals that the complex is of triclinic, space group PI with a = 7.0238（14）, b = 7.2934（11）, c = 17.186（4） A, α = 87.073（13）, β = 84.354（10）, γ = 81.961（12）°, V= 866.9（3） A^3, Z = 1, Dc = 1.474 g/cm^3, F（000） = 402,μ = 62.7 mm^-1, R = 0.0411, wR = 0.0862 and GOF = 1.048. In solid state, the cation [Ni（H2O）4（4,4＇-bpy）2]^2＋ connects six nearby hca counter anions via O-H…O hydrogen bonds to form an extended 2D lattice framework and the O-…N hydrogen bonds finally link the 2D layers into an infinite 3D network.

关键词： nickel(Ⅱ) 4,4'-bipyridyl trans-4-hydroxycinnamic acid crystal structure

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Particle Emission-Dependent Timing Noise of Pulsars

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Chinese Physics Letters 2011年第1期28卷 230-232页

作者： LIU Xiong-wei NA xue-Sen XU Ren-Xin QIAO Guo-Jun School of Physics and State Key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871

Though pulsars spin regularly, the differences between the observed and predicted ToA （tune of arrival）, known as ＂timing noise＂, can still reach a few milliseconds or more. We try to understand the noise in this study. As proposed by Xu and Qiao in 2001, both dipole radiation and particle emission would result in pulsar braking. Accordingly, possible fluctuation of particle current flow is suggested here to contribute significant ToA variation of pulsars. We find that the particle emission fluctuation could lead to timing noise which cannot be eliminated in timing process and that a longer period fluctuation would arouse a stronger noise. The simulated timing noise profile and amplitude are in agreement with the observed timing behaviors on the timescale of years.

关键词： Timing Time Noise

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