简介:构造一个煤矿的虚拟景色是的3D为在煤采矿上现代化并且处理信息的客观要求生产。建立“一个数字矿”也是关键技术。由探索当前的世界范围的研究,软件和硬件工具和应用程序要求,与案例研究地点(Pingdingshan煤组的Daz-huang矿)结合了,为一个矿的3Dgeo可视化的一条途径出现工厂和矿车道深深地被讨论。在这研究,虚拟景色基于弧/信息和Site-Builder3D被学习的为一个大范围的快速的建模方法,和从2D景色的3D景色的自动产生被认识到。能从2D把矿车道系统变换成3D的如此的一个自动方法为Dazhuang矿被认识到。一些相关应用程序问题被学习,包括在在矿表面的虚拟景色的虚拟场面种的2D和3D和矿车道之间的属性质问,并列质问,距离措施,碰撞察觉和动态相互作用。一个原型系统被设计并且发展。
简介:Theexperimentalresultsof3-Dfractureundercompressionareintroducedinbriefandthetheoryofstresscriterionof3-Dfractureisstudied.Methodstoimitateinitialfracturesaredeveloped.Itispointedthatthereareimportantdefectsintheextremevalue(EV)methodeverproposedbyPalaniswamyandKnauss.ThemajordefectliesinthatonlytwoEulerangles(2EA)areconsidered,butanotheroneisneglected.IfthevariationofallthethreeEulerangles(3EA)areconsidered,onecangetbetterresultwhichisconsistentwiththeobservationoffaultingthatextendsoncurvedsurfacesbutnotonplanes.Themethodofevaluatingmaximalnormalstressdirectionvector(NSDV)isproposedandfurtherprovedtobeequivalenttothe3EAmethod.ItisprovedthattheNSDVmethodcanbefurtheroptimizedtothemethodofcompositionofthefirstprincipaldifferentialplane(CFPDP).TheresultsfromCFPDPmethodcanfitthecurvedsurfacesofinitialgrowthobservedintheexperimentsof3-Dfracture.TheCFPDPmethodcanalsobeusedtointerpretthe3-Dfracturesoftheslippingsectionbetweentheasperitiesintheburiedfaultplanethatismodeledasellipsecrack.Theresultsof3-Dfracturecanbeappliedtointerpretingtherelatedproblemsoffaultingincludingthemechanismofalotofshatterrockswithdifferentdimensions,thecauseofearthquakesoccurredattheedgeofplateunderlowshearstress,andthemechanismofanisotropycausedbytheextensivedilatancyanisotropy(EDA)cracks.
简介:摘要:高炉护炉一般不可避免的会造成炉况的波动甚至难行,对高炉的经济技术指标也会有不小的负面影响。唐钢 2000m高炉在维持稳定顺行可持续发展的前提下,保持了正常的经济技术指标,达到了良好的护炉效果,是对护炉优化的一次尝试。
简介:摘要:3D打印技术应用近年来突飞猛进,3D打印技术作为一种增材制造方式,利用数据模型,采用逐层打印的方法,进行造型设计、产品试制、个性化生产等。我院为了适应社会的发展,也在近年开设了3D打印技术应用专业。在专业的建设过程中,我们成功申报了3D打印技术应用专业全国示范基地,围绕着专业的定位、培养方向、师资建设、实训室建设等,需要在实践中不断进行探索和调整,思考和总结,以便更好地适应企业和社会的需要。本文对我院3D打印技术应用专业示范基地建设中的经验进行了思考、分析和总结,逐步梳理工作思路,细化工作方法,为后续相关实践活动的开展奠定坚实基础。
简介:The3^rdInternationalConferenceonContinentalEarthquakes,Mechanism,Prediction,EmergencyManagement&Insurance(the3^rdICCE)washeldonJuly9-14,2004inBeijing,China.TheICCEhasbeenheldeverydecadesinceitwaslaunchedovertwentyyearsago.ThefirstICCE,withthetitle""""InternationalSymposiumonContinentalSeismicityandEarthquakePrediction""""(ISCSEP),hadinternationalsponsorshipandwassupportedbye.g.,UNESCOandhostedbytheSeismologicalSocietyofChina(SSC)inBeijingin1982.In1992inresponsetotheinitiativesfromtheUN'sInternationalDecadeforNaturalDisasterReduction(IDNDR),
简介:EvolutionaryevidencesuggeststhatSox3,amemberofthehigh-mobility-group(HMG)familyoftranscriptionfactors,isanancestralprecursorofSryandisinvolvedinsexdeterminationsimilartoSry.However,thereislimitedinformationregardingtheSOX3geneoftheblackrockfish(Sebastesschlegeli).Inthisstudy,wefirstisolatedSOX3genefromthegonadsofS.schlegelibyhomologycloning.Thefull-lengthofS.schlegeliSOX3(SsSOX3)cDNAwas1386bp,comprisinga906-bpopenreadingframe,whichencodesapeptideshowing93.6%and93.9%homologywiththeSox3proteinsofEpinepheluscoioidesandOryziaslatipe,respectively.ComparisonofthecDNAsequenceoftheSsSOX3genewiththecorrespondinggenomicDNAfragmentrevealedthattheSsSOX3geneconsistsofasingleexon.PhylogeneticanalysisdemonstratedtheevolutionaryrelationshipofSsSOX3withotherknownSOXB1genesinfishandtetrapods.ThepromoterregioncontainsbindingsitesofseveraltranscriptionalfactorsthatmightparticipateintheregulationofSsSOX3expression.Quantitativereal-timePCRanalysisindicatedthatSsSOX3wasexpressedinalltheinvestigatedlarvaldevelopmentalstagesfrom1to35daysafterbirthandthelevelofexpressiongraduallydecreasedasthedevelopmentproceeded.SsSOX3exhibitedsexuallydimorphicexpressioninadultgonads,withhighexpressionintheovarybutlowexpressioninthetestis.InsituhybridizationrevealedthatSsSOX3wasstronglyexpressedinoocytesandfollicularcellsofovariesbutslightlyexpressedingermcellsoftesticulartissues.Therefore,thisstudysuggeststhatSsSOX3playsanimportantroleinoogenesisandovarydifferentiationinS.schlegeli.
简介:Combinedmulti-bodydynamicswithstructuraldynamics,anewdiscreteelementwithflexibleconnector,whichisapplicablefor3-Dbeamstructures,isdevelopedinthispaper.Boththegeneralizedelasticcoefficientmatrixoftheflexibleconnectorandthemassmatrixofdiscreteelementmaybeoff-diag-onalinageneralcase.Thezero-lengthrigidelementisintroducedtosimulatethenodeatwhichmultipleel-ementsarejointedtogether.Itmayalsobeeffectivewhentheaxesofadjacentelementsarenotinthesameline.Theexamplesforeigenvaluecalculationshowthatthemodelissuccessful.Itcanbeextendedtothegeometricnonlinearresponseanalysis.
简介:摘要: X 射线光电子能谱技术( XPS )经过几十年的发展已经成为应用最广泛的表层分析手段。从 XPS 应用到研究纤维素和木素开始,制浆造纸工艺中应用到了越来越多的 XPS 。从原料选取,纸浆纤维素检测观察到纸浆废物成分分析, XPS 全面的指导制浆过程和废物处理。本文详细介绍了 XPS 的原理和优缺点,制浆造纸过程中 XPS 的应用和相关的研究成果。