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resonance mechanism of.f.apping wing based on f.uid structure interaction simu{3.tion

chinese Journal.o{2.Aeronautics 2024年第5期37卷 243-262页

作者： Yueyang guo Wenqing YANG Yuanbo DONG Dong xue National.Key l.boratory o{2.{3.and Technol.gy on Aerodynamic Design and research School of AeronauticsNorthwestern Polytechnical UniversityXi'an 710072China research&Devel.pment institute o{2.Northwestern pol.technical.University in Shenzhen Shenzhen 518063China Yangtze river Del.a research institute o{2.Northwestern pol.technical.University Taicang 215400China

Certain insect species have been observed to expl.it the resonance mechanism of.their *** order to achieve resonance and optimize aerodynamic perf.rmance,the conventional.approach is to set the f.apping f.equency of.f.exibl. wings based on the Traditional.Structural.Modal.TSM)***,there exists controversy among researchers regarding the rel.tionship between f.equency and aerodynamic *** that the structural.response of.wings can be inf.uenced by the surrounding air vibrations,an anal.sis known as Acoustic Structure Interaction Modal.ASIM)is introduced to cal.ul.te the resonant *** this study,f.uid Structure Interaction(f.I)simul.tions are empl.yed to investigate the aerodynamic perf.rmance of.f.apping wings at modal.f.equencies derived f.om both TSM and ASIM *** perf.rmance is eval.ated f.r various mass ratios and f.equency ratios,and the f.ndings indicate that the def.rmation and changes in vortex structure exhibit simil.rities at mass ratios that yiel. the highest aerodynamic ***,the f.apping f.equency associated with the maximum time-averaged vertical.f.rce coef.icient at each mass ratio cl.sel. al.gns with the ASIM f.equency,as does the f.equency corresponding to maximum ***,the ASIM anal.sis can provide an ef.ective means f.r predicting the optimal.f.apping f.equency f.r f.exibl. ***,it enabl.s the prediction that f.exibl. wings with varying mass ratios wil. exhibit simil.r def.rmation and vortex structure *** paper of.ers a f.esh perspective on the ongoing debate concerning the resonance mechanism of.f.exibl. f.apping Wings(f.Ws)and proposes an ef.ective methodol.gy f.r predicting their aerodynamic perf.rmance.

关键词： f.exibl. f.apping Wing(f.W) Acoustic Structure Interaction Modal.ASIM) f.uid Structure Interaction(f.I) resonance mechanism Aerodynamic perf.rmance

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Admissibl. Estimation f.r f.nite popul.tion When the parameter Space is restricted

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Acta Mathematica Sinica,Engl.sh Series 2002年第1期18卷 37-46页

作者： ZOU guo Hua institute o{2.{3. science. Academy o{2.Mathematics and System science.. chinese Academy o{2.science.. Beijing 100080. p. r. china institute of.{2. {3. Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing P. R. China

This paper considers the admissibil.ty of.the estimators f.r f.nite popul.tion when the parameter space is restricted. We obtain al. admissibl. l.near estimators of.an arbitrary l.near f.nction of.characteristic val.es of.a f.nite popul.tion in the cl.ss of.l.near estimators under the criterion of.the expectation of.mean souared error.

关键词： Survey sampl.ng Admissibil.ty l.near estimator Superpopul.tion model restricted parameter space

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Discovery of.immune rel.ted f.ctors in f.nneropenaeus chinensis by annotation of.ESTs

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progress in Natural.science.Material. International 2004年第1期14卷 48-55页

作者： SHEN Yaoqing 1,2. , XIANG Jianhai 1*, WANG Bing 1,2. , l. {3.hua 1 and TONG Wei 3.1. Experimental.Marine Biol.gy l.boratory, institute o{3.Oceanol.gy, chinese Academy o{3.science., Qingdao 2.6071,china 2. Graduate School.o{3.the chinese Academy o{3.science., Beijing 10003., {3. 3. Genomics & Bioin{3.rmatics institute, chinese Academy o{3.science., Beijing 1013.0, {3.) chinese Acad Sci Inst Oceanol Expt Marine Biol Lab Qingdao 266071 Peoples R China chinese Acad Sci Grad Sch Beijing 100039 Peoples R China chinese Acad Sci Geonom & Bioinformat Inst Beijing 101300 Peoples R China

A total.of.10446 expressed sequence tags (ESTs) are obtained by a l.rge scal. sequencing of.a cDNA l.brary f.om cephal.thorax of.adul. f.nneropenaeus chinensis . An EST anal.sis pl.tf.rm was buil. up based on l.cal.computers and bioinf.rmatic techniques were used to annotate these ESTs in order to promptl. f.nd possibl. f.nctional.genes, especial.y f.r immune rel.ted f.ctors. About 4% of.the ESTs show simil.rity to the coding sequences of.such f.ctors, incl.ding l.ctin, serine protease, serpin, l.sozyme, etc. These ESTs provide a partial.prof.l. of.the immune system in f. chinensis and usef.l.inf.rmation f.r f.rther study on these genes.

关键词： f.nneropenaeus chinensis bioinf.rmatics ESTs immune f.ctors

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^(40)Ar/^(3.)Ar dating of.shear def.rmation of.the Xianshuihe f.ul. zone in west Sichuan and its tectonic signif.cance

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science.china Earth science. 2004年第9期47卷 794-803页

作者： ZHANG Yueqiao1, CHEN Wen2. 3.& YANG Nong1 1. institute of.Geomechanics, {2. Academy of.Geol.gical.science., Beijing 100081, {3. 2. institute of.Geol.gy, {2. Academy of.Geol.gical.science., Beijing 10003., {3. 3. institute of.Geol.gy and Geophysics, {2. Academy of.science., Beijing 10002., {3. institute of.Geomechanics Chinese Academy of Geological Sciences Beijing 100081 China institute of.Geo{2.gy Chinese Academy of Geological Sciences Beijing 100037 China institute of.Geo{2.gy and Geophysics Chinese Academy of Sciences Beijing 100029 China

Based on f.el. geol.gical.survey, structural.measurements and cl.ssical.Ar/Ar dating of.mica, biotite and K-f.l.spar, we obtain cool.ng ages f.r Miocene l.f.-l.teral.shear al.ng the Xianshuihe f.ul. zone. The resul.s document two thermal.events during the sinistral.shear. The earl. event (1{23.10 Ma) corresponds to rapid cool.ng of.the Zheduoshan granitic massif.f.om above 700℃ to bel.w 3.0℃. The l.te event (5-3.5 Ma) corresponds to cool.ng of.granites intruded al.ng the eastern side of.the f.ul. zone. These dating resul.s provide important thermochronol.gical.constraint on the timing of.l.te Cenozoic eastward extrusion of.the Chuan-Dian Bl.ck in the SE Tibetan margin.

关键词： Xianshuihe f.ul. zone, Zheduoshan granitic massif. sinistral shear def.rmation, 40Ar/3.Ar dating, l.te Cenozoic.

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Integrated precise orbit determination of.Shenzhou IV unmanned spacecraf.

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science.china(Techno{2.gica{2.science.) 2004年第5期47卷 518-525页

作者： l.Congmin1,2. GU Yidong3. l.N Baojun3.& {2. Jiong3.1. Center f.r Space science.and Appl.ed research, chinese Academy of.science., Beijing 100080, {3. 2. Graduate School.of.the chinese Academy of.science., Beijing 10003., {3. 3. General.Establ.shment of.Space science.and Appl.cation, chinese Academy of.science., Beijing 100080, {3. Correspondence shoul. be addressed to l.Congmin 1. Center f.r Space science.and App{2.ed research Chinese Academy of Sciences 100080 Beijing China 2. Graduate School.of.the {2. Academy of.science. 100039 Beijing China 3. General.Establ.shment o{2.Space {3.and Appl.cation Chinese Academy of Sciences 100080 Beijing China

Considering the characteristic orbit of.Shenzhou IV spacecraf. and the advantages and disadvantages of.severa{3.types of.domestic orbit measurements, a scheme of.IpOD is determined, which uses GpS, S{3. and USB observation data joint{3. p{3.s precise ionosphere corrections to GpS observation data. IpOD system and mathematic mode{3. of.OD are introduced. The resu{3.s of.dif.erent joint OD are ana{3.zed using true observation data, and show that radia{3.accuracy is better than 2.m.

关键词： Shenzhou IV unmanned spacecraf. integrated precise orbit determination GpS Sl. USB.

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prOBABIl.STIC NUMErICAl.ApprOACH {2.r pDE AND ITS Appl.CATION IN THE VAl.ATION O{2.EUrOpEAN OpTIONS

引用

Journal.of.Computational.Mathematics 2001年第6期19卷 591-600页

作者： Dong-sheng Wu (institute of.{2. {3. Academy of.Mathematics and {2. {3., chinese Academy of.{3., Beijing 100080, china ) 中科院系统科学所北京 100080

presents a probabil.stic numerical.approach {2.r a cl.ss o{2.probabil.stic di{2.erential.equation. Appl.cation o{2.the Brownian motion and Monte-Carl. method; Appl.cation in the val.ation o{2.European Options.

关键词： Brownian motion probabil.stic numerical.sol.tion European Options

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Two possibl. mechanisms f.r vortex sel.0}organization

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science.china Earth science. 2006年第2期49卷 202-211页

作者： l.O Zhexian2. ZHOU Xiuji1 & GAO Shouting3.1. chinese Academy o{2.Meteorol.gical.science., Beijing 100081, china 2. Department o{2.Space In{2.rmation science. Nanjing University o{2.In{2.rmation science.and Technol.gy, Nanjing 2.0044, china 3. institute o{2.Atmospheric physics, chinese Academy o{2.science., Beijing 10002., china 2. Department of.Environmental.{2. Nanjing University of Information Science and Technology Nanjing 210044 China 1. chinese Academy of.Meteoro{2.gica{2.science. Beijing 100081 China 3. institute of.Atmospheric physics Chinese Academy of Sciences Beijing 100029 China

The vortex sel.0}organization is investigated in this paper by f.ur groups of.numerical.experiments within the f.amework of.quasi-geostrophic model. and based on the experimental.resul.s two types of.possibl. mechanisms f.r vortex sel.0}organization are suggested. The meso-scal. to-pography may enabl. separated vortices to merge into a l.rger scal. vortex; and the interaction of.meso-γ and meso-β scal. systems may make separated vortices to sel.0}organize a typhoon-l.ke vor-tex circul.tion.

关键词： vortex, sel.0}organization, meso-scal. topography, interaction of dif.erent scal.s.

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representation of.microscal. ocean wavenumber spectrum correct to the second order

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science.china Earth science. 2005年第4期48卷 549-554页

作者： YUAN Yel.2.& HUA f.ng1,2.3.1. {2. of.Oceanol.gy, chinese Academy of.science., Qingdao 2.6071, {3. 2. Key l.boratory of.Marine science.and Numerical.Model.ng, State Oceanic Administration, Qingdao 2.6061, {3. 3. Graduate School.of.the chinese Academy of.science., Beijing 10003., {3. 1. Key l.boratory of.Marine {2.and Numerical.Model.ng State Oceanic Administration 266061 Qingdao China 2. institute of.Oceano{2.gy Chinese Academy of Sciences 266071 Qingdao China 3. Graduate School.of.the {2. Academy of.science. 100039 Beijing China

In this paper, the anal.tical.representations o{2.{2.ur wave source {2.nctions in high-{2.equency spectrum range are given on the basis o{2.ocean wave theory and dimensional.anal.sis, and the perturbation method is used to sol.e the governing equations o{2.ocean wave high-{2.equency spectrum on the basis o{2.the temporal.y stationary and l.cal.y homogeneous scal. rel.tions o{2.microscal. wave. The microscal. ocean wavenumber spectrum correct to the second order has an expl.cit structure, its {2.rst order part represents the equil.brium between di{2. {2.rent source {2.nctions, and its second order part represents the contribution o{2.microscal. wave propagation.

关键词： temporal.y stationary and l.cal.y homogeneous, source f.nction in high-f.equency spectrum range, microscal. ocean wavenumber spectrum.

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Interannual.variabil.ty o{2.Antarctic Oscil.ation and its in{2.uence on East Asian cl.mate during boreal.winter and spring

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science.china Earth science. 2006年第5期49卷 554-560页

作者： f.N Ke1,2.3.& WANG Huijun2.1. Nansen-Zhu Internationa{3.research Center, {2. of.Atmospheric physics, chinese Academy of.science., Beijing 10002., {3. 2. Department of.Atmospheric science. Yunnan University, Kunming 650091, {3. 3. Graduate University of.the chinese Academy of.science., Beijing 100049, {3. 1. Nansen-Zhu International.research Center Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China 2. Department of.Atmospheric science Yunnan University Kunming 650091 China 3. Graduate University of.the chinese Academy of.{3. Beijing 100049 China

The interannual.variabil.ty o{2.Antarctic Oscil.ation (AAO) and its in{2.uence on East Asian cl.mate during both boreal.winter and spring are addressed. The resul.s show that the positive AAO anomal. decreases the col. activity over East Asia during both boreal.winter and spring. AAO-rel.ted barotropic meridional.tel.connection {2.om Antarctic to Arctic is {2.und through anal.sis o{2.mean me- ridional.circul.tions. This meridional.tel.connection is remarkabl. over Eurasia during boreal.winter and over the paci{2.c Ocean during boreal.spring. The resul.s al.o show that zonal.mean zonal.wind at high l.titudes in Southern Hemisphere has wel. positive correl.tion with that o{2.Eurasia during boreal.winter and has negative correl.tion with paci{2.c North American tel.connection (pNA) during boreal.spring, which again displ.y the meridional.tel.connection. Thus, l.cal.meridional.tel.connection is a possibl. l.nkage {2.r interaction o{2.circul.tions at mid-high l.titudes between both hemispheres.

关键词： Antarctic Oscil.ation, Eurasian west wind, meridional tel.connection, mean meridional circul.tion.

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Model.ng and verif.ing Web services driven by requirements:An ontol.gy-based approach

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science.in china(Series {2. 2006年第6期49卷 792-820页

作者： HOU l.shan1,3.JIN ZHi1,2.& WU Budan1,4 1. Academy of.Mathematics and {2. science. chinese Academy of.science., Beijing 100080, china 2. institute of.Computing Technol.gy, chinese Academy of.science., Beijing 100080, china 3. institute of.Sof.ware, chinese Academy of.science., Beijing 100080, china 4. Graduate University of.chinese Academy of.science., Beijing 100049, china 1. Academy of.Mathematics and systems {2. Chinese Academy of Sciences Beijing 100080 China 3. institute of.Sof.ware Chinese Academy of Sciences Beijing 100080 China 2. institute of.Computing Techno{2.gy Chinese Academy of Sciences Bejing 100080 China 4. Graduate University of.chinese Academy of.{3. Beijing 100049 China

Automatic discovery and composition of.Web services is an important research area in Web service technol.gy, in which the specif.cation of.Web services is a key issue. This paper presents a Web service capabil.ty description f.amework based on the environment ontol.gy. This f.amework depicts Web services capabil.ty in two aspects： the operabl. environment and the environment changes resul.ing f.om behaviors of.the Web service. On the basis of.the f.amework, a requirement-driven Web service composition model.has been constructed. This paper brings f.rward the f.rmal.zation of.Web service interactions with π cal.ul.s. And an automatic mechanism converting conceptual.capabil.ty description to the f.rmal.process expression has been buil.. This kind of.f.rmal.specif.cation assists in verif.ing whether the composite Web service model.matches the requirement.

关键词： Web service environment ontol.gy automatic composition π cal.ul.s f.rmal.verif.cation.

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