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chinese Annals of Mathematics,Series B 2002年第2期23卷 149-164页

作者： c.BARDOS y.GUO w.STRAUSS Universite DivisionDepartment Denis Diderot and LAN Universite Pierre et Marie CurieParisFrance.of Applied MathematicsBrown UniversityProvidenceRhode Island 02912U?

The authors investigate the stability of a steady ideal plane flow in an arbitrary domain in terms of the L^2 norm of the vorticity. Linear stability implies nonlinear instability provided the growth rate of the linearized system exceeds the Liapunov exponent of the flow. In contrast,a maximizer of the entropy subject to constant energy and mass is stable. This implies the stability of certain solutions of the mean field equation.

关键词： Stable ideal plane flows Unstable ideal plane flows Liapunov exponent

SNOEK-Kê-K■STER PEAK OF INTERNAL FRIcTION IN Fe-P-N ALLOyS

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Acta Metallurgica Sinica(English Letters) 1998年第1期11卷 12-18页

作者： y.y.che G.y.Zeng y.c.Xu J.w Ji Northeastern Univ Shenyang China

The internal friction and precipitate phases of the deformed Fe-P-N alloys have been investigated. It has been found that the ratio of depends on the content of P and the relation holds if the content of N is lower than *** and the content of P is lower than ***. It shows that the intercept K2 is related to the presence of the atomic pairs and clusters of P in the alloy matrix.

关键词： internal friction Fe-P-N alloy

Erratum:"HI in High Gas-phase Metallicity Dwarf Galaxy wISEA J230615.06+143927.9"(2024,RAA,24,015024)

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Research in Astronomy and Astrophysics 2024年第7期24卷 272-272页

作者： yan Guo c.Sengupta T.c.Scott P.Lagos y.Luo Puyple Mountain Observatory Chinese Academy of SciencesNanjing 210023China School of Astronomy and Space Sciences University of Science and Technology of ChinaHefei 230026China Institute of Astrophysics and Space Sciences(IA Porto) Rua das Estrelas4150-762.PortoPortugal

前瞻性队列中生殖因素对缺血性心脏病的终身累积效应

维普期刊数据库评论

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中华高血压杂志 2024年第1期32卷 20-20页

作者： Hou L Liu w Sun w cao J Shan S Feng y Zhou y yuan c Li X Song P 袁源(译) 郑武洪(审校) 不详

本研究基于终身雌激素高暴露降低心血管风险假说,探究终身雌激素暴露与缺血性心脏病(ischaemic heart disease,IHD)的关联性。方法:2004—2008年,采用生殖寿命(reproductive lifespan,RLS)、内源性雌激素暴露(endogenous oestrogen exposure,EEE)和总雌激素暴露(total oestrogen exposure,TEE)对中国Kadoorie生物样本库的绝经后女性进行生殖因素终身累积效应评估。

关键词：生物样本库缺血性心脏病内源性雌激素心血管风险绝经后女性生殖因素累积效应

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全球变暖与城市

气候变化研究进展 2024年第4期20卷 504-508页

作者：赵宗慈罗勇黄建斌清华大学地球系统科学系北京100084 中国气象局国家气候中心北京100081 中国科学院大学资源环境学院北京100049

城市(city)、城镇(town)和都市(urban)都是城市的考虑范围。城市的界定是一个复杂的问题,直到目前为止,没有一个确定城市边界的国际标准。一般以大量人居住与生活和工作的地方,政府、商业与运输的枢纽为城市,考虑“城市本身”“城市聚... 详细信息

城市(city)、城镇(town)和都市(urban)都是城市的考虑范围。城市的界定是一个复杂的问题,直到目前为止,没有一个确定城市边界的国际标准。一般以大量人居住与生活和工作的地方,政府、商业与运输的枢纽为城市,考虑“城市本身”“城市聚集”“大城市区”等作为界定。世界上超过一半人口生活在城市,处在气候变化的前沿。据联合国统计,2022年城市人口占54.5%,预计到2030年将可能达到60%,2050年将可能达到68%。城市的分级也很复杂,一般城市分级从万人极小城市,到千万人特大城市,城镇人口则可能小到仅有百十人。据联合国统计,人口至少101万的城市,在2022年全球有512个,预计2030年全球将达到662个。观测到的不利影响特别集中在经济和社会边缘化(低收入或无收入)的城市居民中(高信度)。人口1000万或以上的特大城市群(megacity)是人为造成的,更值得注意[1-2]。

关键词：社会边缘化城镇人口城市边界城市聚集特大城市全球变暖城市居民气候变化

Numerical Simulation of Temperature Distribution and ThermalStress Field in a Turbine Blade with Multilayer-Structure TBcs by a Fluid–Solid coupling Method

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Journal of Materials Science & Technology 2016年第5期32卷 452-458页

作者： w.Z.Tang L.yang w.Zhu y.c.Zhou J.w.Guo c.LU Key Laboratory of Key Film Materials and Application for Equipment(Hunan Province) School of Materials Science and EngineeringXiangtan UniversityXiangtan 411105China Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education School of Materials Science and EngineeringXiangtan UniversityXiangtan 411105China Hunan Provincial Key laboratory of Thin Film Materials and Devices School of Materials Science and EngineeringXiangtan UniversityXiangtan 411105China School of Mechanical Engineering Xiangtan University Xiangtan 411105China Department of Mechanical Engineering Curtin UniversityPerthWA 6845Australia

To study the temperature distribution and thermal-stress field in different service stages, a two-dimensional model of a turbine blade with thermal barrier coatings is developed, in which the conjugate heat transfer analysis and the decoupled thermal-stress calculation method are adopted. Based on the simulation results, it is found that a non-uniform distribution of temperature appears in different positions of the blade surface, which has directly impacted on stress field. The maximum temperature with a value of 1030 ℃ occurs at the leading edge. During the steady stage, the maximum stress of thermally grown oxide （TGO） appears in the middle of the suction side, reaching 3.75 GPa. At the end stage of cooling, the maximum compressive stress of TGO with a value of-3.5 GPa occurs at the leading edge. Thus, it can be predicted that during the steady stage the dangerous regions may locate at the suction side, while the leadine edge mav be more Drone to failure on cooling.

关键词： Thermal barrier coatings Temperature distribution Thermal-stress field conjugate heat transfer Decoupled thermal-stress calculation Fluid–solid coupling

基于医防融合理念的家庭医生网格化管理模式研究

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中国全科医学 2024年第31期27卷 3966-3968页

作者：殷道根冯程程杨潍屹王庆川杨俊贺宇峰何崇辉广东省深圳市龙华区中心医院 518110 广东省深圳市龙华区卫生健康局 518110 广东省深圳市龙华区人民医院 518110

深圳市龙华区借鉴新型冠状病毒感染疫情防控期间以社区网格、警区和社康机构为主体的社区“三位一体”联防联控经验[1-4],自2020年起探索开展家庭医生网格化管理模式[5],将社区网格员纳入家庭医生服务团队,充分整合社区组织、社康中心资... 详细信息

深圳市龙华区借鉴新型冠状病毒感染疫情防控期间以社区网格、警区和社康机构为主体的社区“三位一体”联防联控经验[1-4],自2020年起探索开展家庭医生网格化管理模式[5],将社区网格员纳入家庭医生服务团队,充分整合社区组织、社康中心资源,以老年人。

关键词：医防融合网格化管理国家基本公共卫生服务家庭医生签约服务社区健康服务

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characterization of Arroyo Verde Epithermal Deposit:Paragenesis,Mineral Geochemistry,Geochronology and Fluid Inclusions in Lower chon Aike Volcanism,Argentina

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Journal of Earth Science 2024年第1期35卷 62-84页

作者： cecilia Pavón Pivetta Leonardo Benedini Paulo Marcos Ma.Agustina cócola Mercedes Virginia Barros Daniel Gregori Leonardo Strazzere Anderson costa dos Santos Mauro c.Geraldes Instituto Geologico del Sur(INGEOSUR) Universidad Nacional del Sur(UNS)-Consejo Nacional de Investigaciones Cientificas y Tecnicas(CONICET)Bahia Blanca 8000Argentina Dpto.de Geologia Universidad Nacional del Sur(UNS)Bahia Blanca 8000Argentina Universidad Nacional de Rio Negro Instituto de Investigacion en Paleobiologia y GeologiaGeneral Roca 8332Argentina Universidade do Estado do Rio de Janeiro Faculdade de GeologiaDepartamento de Mineralogia e Petrologia igneaRiodeJaneiro20559-900Brazil Geobiotec Departamento de GeocienciasUniversidade de AveiroAveiro 3800-002Portuga

Arroyo Verde epithermal deposit,in the North Patagonia region of Argentina,is located within the Lower chon Aike volcanism and is developed between 192.6±2.5 Ma(mineralization host rock)and 189.5±2.6 Ma(overlying lava).Marifil volcanic complex is the host rock for these veins,veinlets and *** particular small deposit has developed low to intermediate sulphidation characteristics,with gangue mineral textures associated with several ore *** probe microanalysis determines electrum,silver minerals such as acanthite,and tetrahedrite,related Ag-cu minerals like jalpaite,mckinstryite,stromeyerite,and base metals like chalcopyrite,sphalerite,galena and *** inclusions in quartz of two out of five events indicate that these Low Jurassic veins were formed due to subtle boiling and dilution mechanisms and by low-salinity(3.4 wt.%to 6.7 wt.%Nacl Eq)magmatic-hydrothermal fluid at 225 to 310℃.The fluid inclusion measurements that indicate boiling(Event 3)were plotted,and based on this data,we interpret that the Arroyo Verde deposit has been eroded between 550 and 700 *** particular character has not been previously recorded for other sectors of the eastern north Patagonian region.

关键词： epithermal deposit Ag minerals mineral geochemistry fluid inclusions chon Aike geochronology

Experimental measurements of gamma-photon production and estimation of electron/positron production on the PETAL laser facility

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Matter and Radiation at Extremes 2024年第5期9卷 32-47页

作者： F.Brun L.Ribotte G.Boutoux X.Davoine P.E.Masson-Laborde y.Sentoku N.Iwata N.Blanchot D.Batani I.Lantuéjoul L.Lecherbourg B.Rosse c.Rousseaux B.Vauzour D.Raffestin E.D’Humières X.Ribeyre centre Lasers Intenses et Applications UMR 5107Universitéde Bordeaux-CNRS-CEA33405 TalenceFrance cEA DAMCESTAF-33116 Le BarpFrance cEA DAMDIFF-91297 ArpajonFrance cEA LMCEUniversitéParis-Saclay91680 Bruyères-le-ChâtelFrance Institute of Laser Engineering Osaka University2-6 YamadaokaSuitaOsaka 565-0871Japan

This article reports the first measurements of high-energy photons produced with the high-intensity PETawatt Aquitaine Laser(PETAL)*** experiments were performed during the commissioning of the *** laser had an energy of about 400 J,an intensity of 8×10^(18)w cm^(−2),and a pulse duration of 660 fs(FwHM).It was shot at a 2 mm-thick solid tungsten *** high-energy photons were produced mainly from the bremsstrahlung process for relativistic electrons accelerated inside a plasma generated on the front side of the *** paper reports measurements of electrons,protons and *** electrons up to35 MeV with a few-MeV temperature were recorded by a spectrometer,called SESAME(SpectreÉlectronS Angulaire MoyenneÉnergie).K-and L-shells were clearly detected by a photon spectrometer called SPEcTIX(Spectromètre Petalàcristal en TransmIssion pour le rayonnnement X).High-energy photons were diagnosed by cRAcc-X(cassette de RAdiographie centre chambre-rayonnement X),a bremsstrahlung *** cannon analysis is strongly dependent on the hypothesis adopted for the spectral *** shapes can exhibit similar reproductions of the experimental *** eliminate dependence on the shape hypothesis and to facilitate analysis of the data,simulations of the interaction were *** model the mechanisms involved,a simulation chain including hydrodynamic,particle-in-cell,and Monte carlo simulations was *** simulations model the preplasma generated at the front of the target by the PETAL laser prepulse,the acceleration of electrons inside the plasma,the generation of MeV-range photons from these electrons,and the response of the detector impacted by the energetic photon *** this work enabled reproduction of the experimental *** high-energy photons produced have a large emission angle and an exponential distribution *** addition to the analysis of the photon spectra,positron production was also ***,if high

关键词： process. positron hypothesis