简介:BarackObamabecamethefirstAfricanAmericanpresidentcallingforchange.Heisnotonlyfacedwithseriouschallengesontheeconomicandfinancialfronts,butalsohastodealwithavarietyofmajorsocialproblemswhichwillpotentiallyreshapeAmericansocietyinthe21stcentury:increasingeconomicinequality,complexracerelations,anunsustainablehealthcareburdenandaweakeningeducationsystem.TheseareissueswhichhaveexistedfordecadesintheU.S.,butnowitseemsthatPresidentObamahasabetteropportunitytomakea'realchange'happenthanhispredecessors,becauseAmericansocietyisgoingthroughafundamentalevolution.
简介:SinceGeorgeW.Bushassumedthepresidencyinearly2001,atensesituationhadoccurredintherelationshipsamongworldbigpowers.IntheaftermathofSeptember11,significantimprovementhasbeenmadeinSino-U.S.andRussia-U.S.relations.Inthemeantime,correspondingchangeshavetakenplaceinEU-U.S.andRussia-Chinarelations.
简介:Aconvergingpointhasemergedonthehorizon,withanincreasingnumberofcallsforbuildingChina-U.S.+XmechanismsamongChinesescholars,andaveritablezealforinitiatingaROK-U.S.-ChinadialoguefromPresidentParkGeun-hyeofSouthKorea.Thispaperintendstoexplorethepossibilityofsuchatrilateraldialogueandcooperationarrangement,byanalyzingthebackgroundtothetrilateralrelations,theirrespectivestanceandconsiderations,aswellasanyhurdlesinvolvedintheprocess.
简介:Modelinglog-mortalityratesonO-UtypeprocessesandforecastinglifeexpectanciesareexploredusingU.S.data.IntheclassicLee-Cartermodelofmortality,thetimetrendandtheage-specificpatternofmortalityoveragegrouparelinear,thisisnotthefeatureofmortalitmodel.Toavoidthisdisadvantage,O-Utypeprocesseswillbeusedtomodelthelog-mortalityinthispaper.Infact,thismodelisanAR(1)process,butwithanonlineartimedriftterm.BasedonthemortalitydataofAmericafromHumanMortalitydatabase(HMD),mortalityprojectionconsistentlyindicatesapreferenceformortalitywithO-UtypeprocessesoverthosewiththeclassicalLee-Cartermodel.Bymeansofthismodel,thelowboundsofmortalityratesateveryagearegiven.Therefore,lengtheningofmaximumlifeexpectanciesspanisestimatedinthispaper.
简介:摘要:“创新是一个民族的灵魂”,随着人工智能的不断发展和深化,小学信息技术课程标准中添加了程序设计模块,目标是为了让孩子理解编程的基本思想,培养学生发现问题、分析问题、解决问题和学生的创造能力。
简介:OriginDublin,IrelandGenresAlbumRock(专辑摇滚)AlternativePop/Rock(另类流行/摇滚)CollegeRock(学院摇滚)Pop/Rock(流行/摇滚)Post-Punk(后朋克)MembersPaulHewson(laternicknamed"BonoVox"andeventuallyjust"Bono",bornMay10,1960)DaveEvans(laternicknamed"TheEdge",b.August8,1961)AdamClayton(b.March13,1960)LarryMullen,Jr.(b.October31,1961)能够在20多年里不断取得商业上的成功同时又受到乐评人认可的乐队,全世界并没有几个,而U2正是这少数中的一员。U2将自己的音乐理念和商业因素结合,在音乐界取得了非凡的成就。从乐队创建之初一直到现在,U2打破了摇滚乐队和摇滚乐的固有界限,他们用原创音乐配以诚恳的歌词,探讨敏感的社会话题,赢得了同行和乐评人的尊敬,在全世界拥有无数狂热的支持者。下面就是他们的故事。
简介:AheateddebatearoseonthenatureofChina-U.S.relationsamongscholarsinthetwocountries.Arethetwo"strategicpartners"?"Competitors"?"Neitherfriendsnorenemies"?Oreven"Potentialenemies"?Butlargelysince1997,alongwiththeestablishmentoftheframeworkfor"aconstructivestrategicpartnership",thedefinitionseemstohasbeenacceptedbythemainstreamintheChineseacadem-iccircle.Bycontrast,GovernorGeorge.W.Bush,theRepublicanpresidential
简介:WhentheU.S.militarybrassassertedinmid-2014thattheproposeddefensecutbackswereunacceptable,theysignaledtheObamaadministrationthattheywouldnotrolloverandplaydeadwhilemilitaryspendingwascutbybillionsofdollarsinthecoming10years.Theterms"sequestration"and"OCO"wereusedrepeatedlyintheirspeechesand
简介:Militarily,noonehassuspectedthatAmerican-BritishcoalitionforceswouldwintheirwaragainstIraq.Butbefore,duringorafterthewar,thereexistedsomeuncertainties,whichareconcerningthefutureworldstructure,thefutureoftheUnitedStatesitself,theMiddleEast
简介:TheIrannuclearissuehasbecomethe'thirdfactor'inSino-U.S.relations.ProblemsbeganwhentheU.S.imposedsanctionsagainstChinesecompanies,andthisbecameamajorissueaffectingSino-U.S.relationship.ChinaandtheU.S.havedifferentagendasindealingtheIrannuclearissue.However,theyalsosharesomecommonground.DifferentscenariosregardingthelrannuclearissueaffectSino-U.S.relationsindifferentways.
简介:Sincethetopicsofsecurityandcounter-terrorismhaddominatedtherecentU.S.presidentialcampaignanddrawnthepublicattention,2004U.S.presidentialelectionwasalsoakindofreferendumonthenewsecuritystrategyandmilitarystrategypracticedbytheBushadministration.Bush'sreelectionindicatesthattheU.S.militarystrategywillbeconsistentratherthanchangeable,withthefeaturesof"generalconsistencywithpartialadjustments;clearobjectiveswithflexibletactics;unilateralistorientationwithmultilateralapproaches;predeterminedevolutionwithincreasedrestraints."Indetailthetrendsareasfollows:
简介:摘要:随着科技的发展,医学影像设备也正在发生着重大的变化和挑战,应用范围越来越广,性能也在不断提高,功能更趋完善。现代影像设备已经被广泛应用在临床检查、诊断,为医务工作者对患者的诊断和治疗有了非常好的可靠的依据。研究医学图像的人员和医务工作者都希望图像的分析能够显示在屏幕上以便进行分析,这有更加直观、形象的视觉效果。经过十几年的发展,医学诊断设备已经从辅助诊断发展成为辅助治疗的重要手段,并已深入到医学的各个领域。