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在Ad Hoc网络中利用多径路由和预留提供服务质量保证

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Journal of Computer Science & Technology 2004年第C期19卷 78-78页

无线通信技术和计算机网络技术的发展为无线移动Ad Hoc网络的产生奠定了基础。Ad Hoc网络，不论是军用还是民用都有着广泛的应用价值和重要的研究意义。在Ad Hoe网络研究中，因为每个节点兼具路由器的功能，所以路由是一个非常重要的研... 详细信息

无线通信技术和计算机网络技术的发展为无线移动Ad Hoc网络的产生奠定了基础。Ad Hoc网络，不论是军用还是民用都有着广泛的应用价值和重要的研究意义。在Ad Hoe网络研究中，因为每个节点兼具路由器的功能，所以路由是一个非常重要的研究问题。传送具有QoS保证的业务也是Ad Hoc网络需要解决的问题之一。这对于带宽较低、通信线路质量受限的Ad Hoc网络而言，是很大的挑战。所以，如何在Ad Hoc网络条件下合理地利用无线网络资源，实现有针对性的QoS保证也具有现实意义。

关键词： Hoc网络多径服务质量保证 QoS保证路由器无线通信技术通信线路 Hoe网络带宽无线移动

Unraveling brain aging through the lens of oral microbiota

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Neural Regeneration Research 2025年第7期20卷 1930-1943页

作者： Qinchao Hu Si Wang Weiqi Zhang Jing Qu guang-Hui Liu State Key Laboratory of Membrane Biology Institute of ZoologyChinese Academy of SciencesBeijingChina Hospital of Stomatology Guanghua School of StomatologyGuangdong Provincial Key Laboratory of StomatologySun Yat-sen UniversityGuangzhouGuangdong ProvinceChina Advanced Innovation Center for Human Brain Protection and National Clinical Research Center for Geriatric Disorders Xuanwu HospitalCapital Medical UniversityBeijingChina Aging Translational Medicine Center International Center for Aging and CancerBeijing Municipal Geriatric Medical Research CenterXuanwu HospitalCapital Medical UniversityBeijingChina CAS Key Laboratory of Genomic and Precision Medicine Beijing Institute of GenomicsChinese Academy of Sciences and China National Center for BioinformationBeijingChina University of Chinese Academy of Sciences BeijingChina Institute for Stem Cell and Regeneration Chinese Academy of SciencesBeijingChina Aging Biomarker Consortium BeijingChina State Key Laboratory of Stem Cell and Reproductive Biology Institute of ZoologyChinese Academy of SciencesBeijingChina Beijing Institute for Stem Cell and Regenerative Medicine BeijingChina

The oral cavity is a complex physiological community encompassing a wide range of *** of oral microbiota can lead to various oral infectious diseases,such as periodontitis and tooth decay,and even affect systemic health,including brain aging and neurodegenerative *** studies have highlighted how oral microbes might be involved in brain aging and neurodegeneration,indicating potential avenues for intervention *** this review,we summarize clinical evidence demonstrating a link between oral microbes/oral infectious diseases and brain aging/neurodegenerative diseases,and dissect potential mechanisms by which oral microbes contribute to brain aging and *** also highlight advances in therapeutic development grounded in the realm of oral microbes,with the goal of advancing brain health and promoting healthy aging.

关键词： Alzheimer's disease brain aging multiple sclerosis neurodegeneration neurodegenerative diseases oral microbiota Parkinson's disease periodontitis bacteria Porphyromonas gingivalis

Dynamic Regulation of Hydrogen Bonding Networks and Solvation Structures for Synergistic Solar‑Thermal Desalination of Seawater and Catalytic Degradation of Organic Pollutants

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Nano-Micro Letters 2025年第2期17卷 548-565页

作者： Ming‑Yuan Yu Jing Wu guang Yin Fan‑Zhen Jiao Zhong‑Zhen Yu Jin Qu Beijing Key Laboratory of Advanced Functional Polymer Composites Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China State Key Laboratory of Organic‑Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029People’s Republic of China

Although solar steam generation strategy is efficient in desalinating seawater,it is still challenging to achieve continuous solar-thermal desalination of seawater and catalytic degradation of organic ***,dynamic regulations of hydrogen bonding networks and solvation structures are realized by designing an asymmetric bilayer membrane consisting of a bacterial cellulose/carbon nanotube/Co_(2)(OH)_(2)CO_(3)nanorod top layer and a bacterial cellulose/Co_(2)(OH)_(2)CO_(3)nanorod(BCH)bottom ***,the hydrogen bonding networks inside the membrane can be tuned by the rich surface–OH groups of the bacterial cellulose and Co_(2)(OH)_(2)CO_(3)as well as the ions and radicals in situ generated during the catalysis ***,both SO_(4)^(2−)and HSO_(5)−can regulate the solvation structure of Na^(+)and be adsorbed more preferentially on the evaporation surface than Cl^(−),thus hindering the de-solvation of the solvated Na^(+)and subsequent nucleation/growth of ***,the heat generated by the solar-thermal energy conversion can accelerate the reaction kinetics and enhance the catalytic degradation *** work provides a flow-bed water purification system with an asymmetric solar-thermal and catalytic membrane for synergistic solar thermal desalination of seawater/brine and catalytic degradation of organic pollutants.

关键词： Solar steam generation Seawater desalination Catalytic degradation Bacterial cellulose Cobalt hydroxycarbonate nanorods

Experimental Determination of Deformation Induced Lattice Rotation by EBSD Technique for Slip System Analysis

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Journal of Materials Science & Technology 2017年第1期33卷 90-98页

作者： Xuehao Zheng hongwang Zhang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of Sciences National Engineering Research Center for Equipment and Technology of Cold Strip Rolling College of Mechanical EngineeringYanshan University

A method was proposed to experimentally determine the deformation induced lattice rotation by electron backscatter diffraction （EBSD） technique, based on which the activated slip systems could be predicted. The method is to create a project file including the EBSD data of the sample before and after deformation, which allows the lattice rotation to be calculated and visualized using the commercial EBSD software. This method was applied to a polycrystalline Ni subjected to quasi-static compression. The lattice rotation of one grain was calculated and visualized and the activated slip systems were predicted. The comparison with the slip systems predicted by full-constraints （FC） Taylor model highlights the advantage of the present method.

关键词： Lattice rotation Electron backscatter diffraction Slip system Deformation

CLOSED SMOOTH SURFACE DEFINED FROM CUBIC TRIANGULAR SPLINES

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Journal of Computational Mathematics 2005年第1期23卷 67-74页

作者： Ren-zhongFeng Ren-hongwang DepartmentofMathematics BeijingUniversityofAeronauticsandAstronauticsKeylaboratoryofMathematicsInformaticsandBehavioralSemanticsMinistryofEducationBeijing100083China MathematicalScienceInstitute DalianUniversityofTechnologyDalian116023China

In order to construct closed surfaces with continuous unit normal, we introduce a news pline space on an arbitrary closed mesh of three-sided faces. Our approach generalizes an idea of Goodman and is based on the concept of 'Geometric continuity' for piecewise polynomial parametrizations. The functions in the spline space restricted to the faces are cubic triangular polynomials. A basis of the spline space is constructed of positive functions which sum to 1. It is also shown that the space is suitable for interpolating data at the midpoints of the faces。

关键词： closed triangular mesh triangular bernstein polynomial smooth spline geometric continuity

THE STRUCTURAL CHARACTERIZATION AND LOCALLY SUPPORTED BASES FOR BIVARIATE SUPER SPLINES

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Journal of Computational Mathematics 2004年第6期22卷 807-816页

作者： Zhi-qiangXu Ren-hongwang InstituteofMathematicalSciences DalianUniversityofTechnologyDalian116024China InstituteofMathematicalSciences DalianUniversityofTechnologyDalian116024China

Super splines are bivariate splines defined on triangulations, where the smoothness enforced at the vertices is larger than the smoothness enforced across the edges. In this paper, the smoothness conditions and conformality conditions for super splines are presented. Three locally supported super splines on type-1 triangulation are presented. Moreover, the criteria to select local bases is also givenBy using local supported super spline function, a variation-diminishing operator is built. The approximation properties of the operator are also presented.

关键词： Local Bases Spline Super Spline

Gravity Effect on the First Natural Frequency of Offshore Wind Turbine Structures

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Transactions of Nanjing University of Aeronautics and Astronautics 2016年第1期33卷 95-101页

作者： Ma hongwang Chen Longzhu Department of Civil Engineering Shanghai Jiao Tong University

The fatigue limit state is critical for most offshore wind *** minimize the development of fatigue damage,dynamic amplification of the response must be ***,it is important to ensure that the first natural frequency of the offshore wind turbine does not coincide with the excitation frequencies related to wind turbine and wave *** evaluating the self-gravity influence on the first natural frequency of wind turbine support structures,the offshore wind turbine system vibration is modeled using an Euler-Bernoulli beam with axial force and horizontal *** data from five wind turbines available in the market are *** sizes of wind turbines vary from 2.3MW to 6MW,and subsequently,the heights of tubular steel towers vary from 83 mto *** indicate that the average influence of gravity on the first natural frequency is nearly 1.8%.The first natural frequency is considered ranging from 1P(rototor frequency)to 3P(blade passing frequency).The design procedure requires an accurate evaluation of the first natural *** this perspective,the first natural frequency is reduced since gravity needs to be considered for the design of offshore wind turbine support structures,especially when the first natural frequency of the offshore wind turbine is close to the lower limit,rotor frequency1 P.

关键词： offshore wind turbine the first natural frequency gravity Euler-Bernoulli beam

Evaluation of Stored Energy from Microstructure of Multi-component Nanostructured Cu

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Journal of Materials Science & Technology 2012年第4期28卷 289-293页

作者： Feng Yan hongwang Zhang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

A polycrystalline Cu of 99.995% purity has been deformed by dynamic plastic deformation at liquid nitrogen temperature to a strain of 2.1 （LNT-DPD Cu）. Three distinct regions that are dominated by dislocation slip, shear banding and nanotwinning, form a multi-component nanostructure. The microstructure of each region has been quantified by transmission electron microscopy assisted by Kikuchi line analysis. Based on the structural parameters the stored energy of each region was evaluated, and the total energy can be assumed to be a linear additivity of that in each region weighted by the respective volume fraction. A microstructure based evaluation of the stored energy of multi-component nanostructure has been proposed.

关键词： Stored energy Cu Dynamic plastic deformation Transmission electron microscopy

A KIND OF MULTIVARIATE NURBS SURFACES

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Journal of Computational Mathematics 2004年第1期22卷 137-144页

作者： Ren-hongwang Chong-JunLi InstituteofMathematicalSciences DalianUniversityofTechnologyDalian116024China

The purpose of this paper is to construct a kind of multivariate NURBS surfaces by using the bivariate B-splines in the space S1/2(Δmn^(2) and discuss some properties of this kind of NURBS surfaces with multiple knot... 详细信息

关键词： Bivariate B-spline NURBS surfaces Type-2 triangulation (Δ[(2)][mn])