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A Modified Multiple Matching Method Based on Equipoise Pseudomulti-Channel Filter and Huber Nor

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Communications in Computational Physics 2020年第6期28卷 498-517页

this study is aimed at improving multiple adaptive *** propose a modified pseudomulti-channel matching method based on the Huber norm,to adjust the matching differences on frequency and phase between the predicted multi-ples and original *** second-order derivative of the predicted multiples is utilized to replace the derivative of its Hilbert *** to the additional frequency term,this method can enhance the high-frequency *** introduce 180◦phase rotation of the multiple channels,which can decrease phase *** Huber norm interpolates between smooth L2 norm treatment of small residuals and robust L1 norm treatment of large *** method can eliminate the restriction of large value conditions from the L2 norm and weaken the condition of orthogonality from the L1 *** applications of the Pluto and Delft models shows that compared with pseudomulti-channel matching filter,the main frequency is increased from 36 Hz to 38 Hz,and the primary reflection wave is more *** practical application of field data verifies the effectiveness of the proposed method.

关键词： Multiple adaptive matching filter equipoise pseudomulti-channel Huber norm second-order derivative

High-magnetic-field induced charge order in high-t_c cuprate superconductors

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Chinese Physics B 2019年第11期28卷 25-42页

作者： L X Zheng J Li t wu Hefei National Laboratory for Physical Science at Microscale University of Science and Technology of ChinaHefei 230026China Key Laboratory of Strongly-coupled Quantum Matter Physics University of Science and Technology of ChinaChinese Academy of SciencesHefei 230026China CAS Center for Excellence in Superconducting Electronics(CENSE) Shanghai 200050China CAS Center for Excellence in Quantum Information and Quantum Physics Hefei 230026China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China

In the last few years, charge order and its entanglement with superconductivity are under hot debate in high-tc community due to the new progress on charge order in high-tc cuprate superconductors YBa2Cu3O6+x. Here, we will briefly introduce the experimental status of this field and mainly focus on the experimental progress of high-field nuclear magnetic resonance(NMR) study on charge order in YBa2Cu3O6+x. the pioneering high-field NMR work in YBa2Cu3O6+x sets a new stage for studying charge order which has become a ubiquitous phenomenon in high-tc cuprate superconductors.

关键词： charge order cuprates nuclear magnetic resonance YBa2Cu3O6+x superconductors competing order

CONtINUOUS tHERMODYNAMICS FOR POLYMER SOLUtIONS II . LAttICE FLUID MODEL

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Chinese Journal of Chemical Engineering 1995年第1期3卷 14-25页

作者：胡英英徐根 D.t.wu J.M.Prausnitz Marshall Laboratory.E.I.Du Pont de Nemours & Company Philadelphia PA 19146USA Department of Chemical Engineering University of CaliforniaBerkeley BerkeleyCA 94720USA

Using lattice-fluid model, a continuous thermodynamic framework is presented for phase-equilibrium calculations for binary solutions with a polydisperse polymer solute. A two-step process is designed to form a real polymer solution containing a solvent and a polydisperse polymer solute occupying a volume at fixed temperature and pressure. In the first step, close-packed pure components including solvent and polymers with different molar masses or different chain lengths are mixed to form a closed-packed polymer solution. In the second step, the close-packed mixture, considered to be a pseudo-pure substance is mixed with holes to form a real polymer solution with a volume dependent on temperature and pressure. Revised Freed's model developed previously is adopted for both steps. Besides pure-component parameters, a binary size parameter cr and a binary energy parameter e12 are used. they are all temperature dependent. the discrete-multicomponent approach is adopted to derive expressions for chemical potentials, spinodals and critical points. the continuous distribution function is then used in calculations of moments occurring in those expressions. Computation procedures are established for cloud-point-curve, shadow-curve, spinodal and critical-point calculations using standard distribution or arbitrary distribution on molar mass or on chain length. Illustrative examples are also presented.

关键词： continuous thermodynamics polymer solution polydispersity lattice-fluid model cloud-point curve shadow curve spinodal upper-critical-solution temperatures lower-critical-solution temperature.

Effect of Silicone Maintenance Materials on thermal Aging Resistance of Asphalt Mixture

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武汉理工大学学报 2010年第17期32卷 71-75页

作者： LIN J t wu S P WAN L Key Laboratory of Silicate Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China

Early water damage of asphalt pavement is one of the major types of destruction,so taking maintenance on asphalt pavement at the proper time is necessary. Many new maintenance materials and methods are in use nowadays to prevent pavement from water damage and skidding. this paper aims to study the effects of the silicone maintenance materials on thermal aging resistance of asphalt mixture. After thermal aging,the asphalt mixture using silicone materials and the control mixture are evaluated through their engineering properties,including indirect tensile modulus,low-temperature performance and fatigue resistance. the results indicate that the silicone materials used as repairing material can improve low-temperature performance and fatigue resistance of asphalt mixture,and decrease the indirect tensile modulus ratio before and after thermal aging. Consequently,the silicone maintenance material has the ability to protect asphalt mixture from thermal aging.

关键词： asphalt mixture silicone waterproof agent thermal aging properties

消声器传递损失预测的边界元模态展开混合方法

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声学学报 2015年第6期40卷 836-844页

作者：杨亮季振林 wu t W 哈尔滨工程大学动力与能源工程学院哈尔滨150001 肯塔基大学机械工程学院美国列克星敦40506

将边界元法和解析方法结合形成一种混合方法用于计算消声器的传递损失,消声器被划分成若干个子结构,解析方法和边界元方法被分别用于计算规则结构和不规则结构的阻抗矩阵,不同子结构之间通过阻抗矩阵连接起来。为减少计算时间,采用一种... 详细信息

将边界元法和解析方法结合形成一种混合方法用于计算消声器的传递损失,消声器被划分成若干个子结构,解析方法和边界元方法被分别用于计算规则结构和不规则结构的阻抗矩阵,不同子结构之间通过阻抗矩阵连接起来。为减少计算时间,采用一种基于模态配点法的简化方法。对单级膨胀腔、双级膨胀腔和穿孔管阻性消声器的传递损失进行了计算,混合方法计算结果与解析方法和三维数值方法计算结果吻合良好。分析了混合方法的计算效率并与传统子结构方法进行了比较,混合方法能明显节省计算时间。

关键词：阻性消声器混合方法传递损失模态展开边界元法损失预测子结构方法解析方法

Magnetoacoustic Waves in the Solar Stratified Atmosphere

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Chinese Physics Letters 2001年第12期18卷 1624-1627页

作者： ZHENG Hui-Nan WANG Shui S.t.wu LI Bo Department of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026 Center for Space Plasma and Aeronomic Research and Department of Mechanical Engineering University of Alabama in HuntsvilleHuntsvilleAL 35899USA

the propagation of magnetoacoustic waves in the solar atmosphere consisting of the photosphere, chromosphere and corona has been studied numerically by time-dependent multi-dimensional magnetohydrodynamic (MHD) simulation. Pressure disturbances are introduced at the bottom of the chromosphere and at the bottom of the corona, respectively. the computational results show that incurred fast and slow MHD waves propagate away from the source of the disturbances. the fast MHD wave propagates as an expansive wave in the radial direction, while the slow one steepens and it may evolve into a slow shock. We suggest that the extreme ultraviolet imaging telescope wave observed by the SOHO and Moreton wave are a fast MHD wave propagating in the corona and in the chromosphere, respectively.

关键词： Solar Atmosphere steep

消声器传递损失预测的边界元数值配点混合方法

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振动与冲击 2016年第2期35卷 153-157,206页

作者：杨亮季振林 wu t W 哈尔滨工程大学动力与能源工程学院哈尔滨150001 肯塔基大学机械工程学院列克星敦40506

将边界元法与数值配点法结合形成混合方法用于计算任意截面形状消声器的传递损失。消声器划分为若干子结构,用边界元法计算具有非规则形状的子结构阻抗矩阵,用二维有限元法提取等截面子结构特征值及特征向量,用配点法获得阻抗矩阵;将每... 详细信息

将边界元法与数值配点法结合形成混合方法用于计算任意截面形状消声器的传递损失。消声器划分为若干子结构,用边界元法计算具有非规则形状的子结构阻抗矩阵,用二维有限元法提取等截面子结构特征值及特征向量,用配点法获得阻抗矩阵;将每个子结构阻抗矩阵连接用于传递损失计算。为减少计算时间提出简化方法计算消声器传递损失。结果表明,混合法在保证计算精度前提下可节省计算时间。

关键词：消声器传递损失边界元方法数值配点方法

Synthesis of demethoxy-amino-substituted hypocrellins: novel photosensitizers for photodynamic therapy

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Chinese Chemical Letters 2000年第11期11卷 963-966页

作者： wu t. Xu S.J. Shen J.Q. Chen S. Zhang M.H. Shen t. Center for Molecular Science Institute of Chemistry Chinese Academy of Science Beijing 100080 China

A novel method was used to obtain demethoxy-amino-substituted hypocrellin derivatives. Peri-hydroxylated perylenequinone structure of hypocrellin was reserved when hypocrellin reacted with an amine in pyridine. the products were new compounds with significant cytotoxicity against tumor cells. their structures have been established on the basis of their mass and 1H NMR spectra.

关键词： Synthesis of demethoxy-amino-substituted hypocrellins novel photosensitizers for photodynamic therapy

Synthesis of proline fullerene derivative

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Chinese Science Bulletin 1997年第16期42卷 1360-1363页

作者： Zhao, YL Gan, LB Zhou, DJ Luo, CP Huang, CH Jia, GC wu, t Peking Univ State Key Lab Rare Earth Mat Chem & Applicat Beijing 100871 Peoples R China Hong Kong Univ Sci & technol Hong Kong Hong Kong Peoples R China Inst Beijing Microchem Beijing 100091 Peoples R China

tHE unique spherical nature and potential application of fullerene have attracted great attention. their functionalization is in particular an active research field. Many methods are now available for the preparation of fullerene derivatives. the 1, 3-dipole cycloaddition of ylide to fullerene is one of the best known methods. We have recently reported that aminoacid esters can be added to C60 to form fulleropyrrolidine derivatives under photolysis. Our in-

关键词： fullerene pyrrolidine stereoisomer.