两种直接波浪能转换系统性能的比较:阿基米德波浪摆和波能浮筒(英文)

Many wave energy conversion devices have not been well received. The main reasons are that they are too complicated and not economical. However, in the last two decades direct conversion systems have drawn the attention of researchers to their widely distributed energy source due to their simple structure and low cost. The most well-known direct conversion systems presently in use include the Archimedes Wave Swing (AWS) and Power Buoy (PB). In this paper, these two systems were simulated in the same conditions and their behaviors were studied in different wave conditions. In order to verify the simulations, results of the generator of the finite element computations were followed. An attempt was made to determine the merits and drawbacks of each method under different wave conditions by comparing the performance of the two systems. The wave conditions suitable for each system were specified.     

人的睫状神经节(解剖观察)

<正> 随着现代显微外科的出现和新的诊断手段的发展,如电子计算机断层摄影,感觉到对睫状神经节及其联系和眼眶内其他结构的解剖学再观察是需要的。在手术显微镜下解剖观察30例眼眶。观察结果: 30例标本都有睫状神经节。该节是不规则形,卵园形或长方形,其最长经平行于视神经轴。其位置紧靠于眼眶内视神经后部的外侧。罕见眼动脉插入视神经和该神经节之间。该神     

基于GP模型的高等教育资源配置研究

为回避传统的教育资源配置定性研究方法,使高等教育资源在定量的基础上实现优化配置,提出了一种ＧＰ模型,并在对模型进行验证,求解的基础上结合广东省高等教育资源配置情况进行结果分析和讨论。最后,提出模型的改进方向。     

乡道养护质量检查量验初探

随着《公路养护质量检查评定标准》（ＪＴＪ０７５－９４）的颁布实施，如何在不设专业养护值班，仅靠农民代表工进行季节性养护的乡道上进行养护质量检查量验，笔者在这方面作了一些探索，提出了一个简易可行的方法。     

Development of Thermal Process and Numerical Modeling

IntroductionWithinrecentdecade,thenumericaIsimulationhasbeenrapidlyachievedandhasaPpliedtothermalmanufacturingprocess.ThephasetransformationiscomplicatedbythefactthatthereareseveralmicrostructuralscaIestoconsideHl1-I4].InordertorevealtheruIeofcomplexphasetransformation,itisnecessarytousethetoolofnumericalsimulationtomodelandcontroltheoverallprocessofphasetransformation.NowthecomputersimulationcangetsomereasonabIeresultSinmanyaspectsofthermalmanufacturingprocess:e.g.,thesimulationoftemperat…     

Calculation of Transient Stress Field During Laser Transformation Hardening Process

IntroductionHighpowerCOzlaserssdsetransformationhardeningtechniquehasbeensuccessfullyusedinindusnyforWYears.BecausethetemPeratUrefleldislocalizedinmaterialdurllglasertransfonnationhMngProcess,highthermstrCsswillgenerateinmatgrialduringlasertfansformationhardeningProcess.Therisalsohighresidualstressinmaterial,bothintCnsionandcomPression['-'].ComPressresidualstressishelptoincreasethefatigueldrimeofthelasertreatedmaterial,butthetensilestresswillshortenthefatiguelifetmeofthelasertreatedmator…     

A Numerical Model for Multiple Phase Transformations in Steels during Thermal Processes

IntroductionltiswellknownthatmetallmpicalstrUcforeofsteelsandheattransferarefullycouPled.PhasechangesdependontemPertheeevoluton,whereastemPertheeisinfluencedbycontrastsofmaterialcharacteristicsbetWeenphasesandlatenheateffects.AlotofworkhasbeenpefformedonthssubeCt,andclassicalmodelsarenowwidelyimPlementedintofiniteelementcomPutercodes[l][2][31[4][5][61.Thesemodelsaregenerallybasedonf.AVramityPekinetics[7][8]l9]Whnthephasechangeisgovernedbydiffusion,.TheKoistinen-Marburgerlaw[l0]fOrmfornsi…     

Computer Simulation of Thermal-Mechanical Processing

AlterationIntroductionThereisastrongini6ractionamongtemPetalrefield,strCssfield,andmicrosttuctutulaltOrationinm8terialsduringtheirhotworking[l'2].Especiallyduringthecoolingprocess,inwhichtemPeratorechangnsgreatly,intendionsbecomemorecomplexbecauseoftransformationoccurmnce.Duringthehotdeformation,thingswillaPpearsuchas:a.hotdeformation,relatedtostressfieId,changesessentiallytheshaPeofmaterialsandcausesthevariationofthecontactstatebetWeenthedieandsample,resultinginchangeofthethermalboundnyco…     

Daimler公司的新型14.8L商用车柴油机

Daimler卡车(北美)公司将Detroit DD15柴油机配装在联运新型载货车上并投放市场。这种排量为14.8L的柴油机属于Daimler公司全球重型载货车用发动机平台的一部分,是专门为北美自由贸易协议(NAFTA)地区市场开发的,其目标是满足车载诊断系统的新要求,以及之前生效的极其严格的美国温室效应气体排放法规。介绍DD15柴油机的开发目标、热力学开发步骤、产品验证,以及在新型节能NAFTA柴油机开发过程中的全球协作。