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On Local Descent to Metaplectic Groups and Local Theta Correspondence

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Acta Mathematica Sinica,English Series 2021年第1期37卷 142-172页

作者： bin XU School of Mathematics Sichuan UniversityChengdu 610064P.R.China

Let F be a p-adic field of characteristic *** study a twisted local descent construction for the metaplectic groups Sp2 n(F),and also its relation to the corresponding local descent construction for odd special orthogonal groups via local theta *** consequence,we show that this descent construction gives irreducible supercuspidal genuine representations of Sp2n(-F)parametrized by a simple local L-parameterφτcorresponding to an irreducible supercuspidal representationτof GL2n(F)of symplectic type,and the genericity of the representations constructed can be indicated by a local epsilon factor *** particular,this local descent construction recovers the local Shimura correspondence for supercuspidal representations.

关键词： Local descent local Vogan L-Packets local Theta correspondence

Experiments and calculations of wave breaking and evolution of wave groups with high steepness

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Journal of Hydrodynamics 2022年第5期34卷 975-980页

作者： Wen-yang Duan Kun Zheng bin-bin Zhao College of Shipbuilding Engineering Harbin Engineering UniversityHarbin150001China

The evolution of the nonlinear wave groups in deep water is investigated through laboratory measurements and numerical *** experiments are conducted in deep-water wave tank,focusing on the characteristics of breaking waves arising from the evolved wave *** quantitative results are obtained for the significant breaking wave train,including the surface elevation time series,the local geometry,and the energy dissipation.A nonlinear model for the evolution of the wave groups in deep water is developed by adding eddy viscosity dissipation terms in the High Level Irrotational Green-Naghdi(HLIGN)*** results of the simulation are compared with the laboratory measurements,and good agreement is observed for the evolved wave train.

关键词： Wave group evolution wave breaking High-Level Irrotational Green-Naghdi(HLIGN)equations laboratory experiments

mFAST:A MATLAB toolbox for ocean bottom seismometer refraction first-arrival traveltime tomography

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Earth and Planetary Physics 2022年第5期6卷 487-494页

作者： bin Liu Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China Guangzhou Marine Geological Survey Guangzhou 511458China

First-arrival seismic traveltime tomography(FAST)is a well-established technique to estimate subsurface velocity *** several existing open-source packages are available for first-arrival traveltime tomography,most were written in compiled languages and lack sufficient extendibility for new algorithms and *** this work,we develop an open-source,selfcontained FAST package based on MATLAB,one of the most popular interpreted scientific programming languages,with a focus on ocean bottom seismometer refraction traveltime *** package contains a complete traveltime tomography workflow,including ray-tracing-based first-arrival traveltime computation,linearized inversion,quality control,and high-quality *** design the package as a modular toolbox,making it convenient to integrate new algorithms and functionalities as *** the current stage,our package is most efficient for performing FAST for two-dimensional ocean bottom seismometer *** demonstrate the efficacy and accuracy of our package by using a synthetic data example based on a modified Marmousi model.

关键词： ocean bottom seismometer(OBS) first-arrival traveltime tomography open source MATLAB

Web mining based on chaotic social evolutionary programming algorithm

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Journal of Systems Engineering and Electronics 2008年第6期19卷 1272-1276页

作者： Xie bin School of Management Northwestern Polytechnical Univ. Xi'an 710072 P. R. China

With an aim to the fact that the K-means clustering algorithm usually ends in local optimization and is hard to harvest global optimization, a new web clustering method is presented based on the chaotic social evolutionary programming （CSEP） algorithm. This method brings up the manner of that a cognitive agent inherits a paradigm in clustering to enable the cognitive agent to acquire a chaotic mutation operator in the betrayal. As proven in the experiment, this method can not only effectively increase web clustering efficiency, but it can also practically improve the precision of web clustering.

关键词： web clustering chaotic social evolutionary programming K-means algorithm

Multi-dimensional Classification via Selective Feature Augmentation

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Machine Intelligence Research 2022年第1期19卷 38-51页

作者： bin-bin Jia Min-Ling Zhang School of Computer Science and Engineering Southeast UniversityNanjing 210096China College of Electrical and Information Engineering Lanzhou University of TechnologyLanzhou 730050China Key Laboratory of Computer Network and Information Integration Southeast UniversityMinistry of EducationChina

In multi-dimensional classification(MDC), the semantics of objects are characterized by multiple class spaces from different dimensions. Most MDC approaches try to explicitly model the dependencies among class spaces in output space. In contrast, the recently proposed feature augmentation strategy, which aims at manipulating feature space, has also been shown to be an effective solution for MDC. However, existing feature augmentation approaches only focus on designing holistic augmented features to be appended with the original features, while better generalization performance could be achieved by exploiting multiple kinds of augmented *** this paper, we propose the selective feature augmentation strategy that focuses on synergizing multiple kinds of augmented ***, by assuming that only part of the augmented features is pertinent and useful for each dimension′s model induction, we derive a classification model which can fully utilize the original features while conduct feature selection for the augmented features. To validate the effectiveness of the proposed strategy, we generate three kinds of simple augmented features based on standard k NN, weighted k NN, and maximum margin techniques, respectively. Comparative studies show that the proposed strategy achieves superior performance against both state-of-the-art MDC approaches and its degenerated versions with either kind of augmented features.

关键词： Machine learning multi-dimensional classification feature augmentation feature selection class dependencies

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阿片类药物诱导瘙痒的机制研究进展

中国药理学通报 2025年第1期41卷 29-34页

作者：马芳周培岚苏瑞斌军事医学研究院国家安全特需药品全国重点实验室北京100850 南京中医药大学药学院江苏南京210046

瘙痒是临床使用阿片类药物镇痛的患者普遍存在的严重不良反应之一。大量研究已经阐明阿片类药物的镇痛机制,但阿片类药物诱导瘙痒的机制尚不明确,瘙痒与镇痛之间的关系也模糊不清。目前的研究发现,阿片类药物作用于μ、κ及δ阿片受体后... 详细信息

瘙痒是临床使用阿片类药物镇痛的患者普遍存在的严重不良反应之一。大量研究已经阐明阿片类药物的镇痛机制,但阿片类药物诱导瘙痒的机制尚不明确,瘙痒与镇痛之间的关系也模糊不清。目前的研究发现,阿片类药物作用于μ、κ及δ阿片受体后,直接或间接影响瘙痒关键受体——胃泌素释放肽受体的功能,进而影响瘙痒信息传递。神经介素B、神经肽Y、B型利钠肽等神经肽,以及其他受体如瞬时受体电位香草素1受体、N-甲基-D-天冬氨酸受体、5-羟色胺受体等,在吗啡诱导的瘙痒中也具有重要作用。此外,阿片类药物所致瘙痒的预防和治疗也是围手术期吗啡镇痛的难点和热点之一。因此,明确瘙痒的具体发生机制,对寻找新的研究思路及预防和治疗阿片类药物诱导的瘙痒具有重要意义。

关键词：阿片类诱导的瘙痒瘙痒与镇痛瘙痒机制阿片受体胃泌素释放肽受体瘙痒治疗

NUMERICAL SIMULATION OF TURBULENT SPOTS IN INCLINED OPEN-CHANNEL FLOW

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Journal of Hydrodynamics 2005年第2期17卷 179-185页

作者： ZHANGLi TANGDeng-bin CollegeofAerospaceEngineering NanjingUniversityofAeronauticsandAstronauticsNanjing210016China

The generation and evolution of turbulent spots in the open-channel flow are simulated numerically by using the Navier-Stokes equations. An effective numerical method with high accuracy and high resolution is developed. The fourth-order time splitting methods with high accuracy is proposed. Three-dimensional coupling difference methods are presented for the spatial discretization of the Poisson equation of pressure and Hemholtz equations of velocity, therefore, the fourth-order three-dimensional coupling central difference schemes are constituted. The fourth-order explicit upwind-biased compact difference schemes are designed to overcome the difficulty for the general higher-order central difference scheme which is inadaptable in the boundary neighborhood. The iterative algorithm and overall time marching is used to enhance efficiency. The method is applied in the numerical simulation of turbulent spots at various complex boundary conditions and flow domains. The generation and the developing process of turbulent spots are given, and the basic characteristics of turbulent spots are shown by simulating the evolution of the wall pulse in inclined open-channel flow.

关键词： turbulent spot Navier-Stokes equation numerical simulation three-dimensional coupling difference scheme wall pulse

Designing novel adaptive dynamic event-triggered protocols for uncertain multi-agent systems

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Science China(Information Sciences) 2024年第1期67卷 310-311页

作者： bin CHENG bin HE College of Electronics and Information Engineering Tongji University Frontiers Science Center for Intelligent Autonomous Systems

Multi-agent systems (MASs) have garnered widespread attention and have been investigated by numerous researchers in recent years, primarily due to their broad applications in industry, transportation, agriculture, and astronomy. While studying the cooperative control of MASs, numerous researchers place emphasis on reducing the frequency of communication among neighboring agents.

关键词： Directed graphs

In Situ Synchrotron Radiation Techniques: Watching Deformation-induced Structural Evolutions of Polymers

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Chinese Journal of Polymer Science 2018年第10期36卷 1093-1102页

作者： Liang-bin Li National Synchrotron Radiation Lab Chinese Academy of Sciences Key Laboratory of Soft Matter Chemistry Anhui Provincial Engineering Laboratory of Advanced Functional Polymer Film University of Science and Technology of China

Synchrotron radiation （SR） provides highly brilliant light with tunable wavelength from hard X-ray to far infrared, on which scattering, spectroscopy and imaging techniques with high time and spatial resolutions have been developed for in situ study on biological system and materials like polymer. With examples on flow-induced crystallization of polymer, deformation of nanoparticle filler network in rubber composite and necking propagation in tensile stretch, current work attempts to demonstrate the advantages of in situ synchrotron radiation X-ray scattering, X-ray nano-CT and infrared imaging in the study of deformation-induced multi-scale structural evolutions of polymers. With time resolution up to sub-ms, synchrotron radiation is expected to play a great role in understanding non-equilibrium polymer physics under processing and service conditions, while high-throughput characterization platform based on synchrotron radiation opens the possibility to establish polymer Materials Genome database in processing parameter space within reasonable time, which can serve as the roadmap for industrial polymer processing and accelerate material innovation.

关键词： Synchrotron radiation techniques X-ray nano-CT Flow-induced crystallization Necking propagation Rubber nanocomposite