学科分类
/ 25
500 个结果
  • 简介:对于兼容ANSI的终端,如xterm、rxvt、konsole等,可以彩色显示终端文本中的底色或前景颜色,本文将详细讨论如何实现随意修改和定制这些终端的颜色。

  • 标签: LINUX ANSI SHELL BASH 色彩定制 转义序列符
  • 简介:Shell煤气化工艺(也称SCGP工艺)是由荷兰壳牌全球方案解决公司开发的一种干煤粉气流床加压气化技术。目前Shell气化技术的最大用户在中国。Shell煤气化技术自1996年开始引入中国,在不到十年时间内取得了很大进展,尤其是近几年,随着石油资源的供应紧张和环保要求的日益提高,其在各个领域和行业受到越来越多的关注。

  • 标签: 加压气化技术 SHELL煤气化工艺 综述 干粉 SCGP工艺 煤气化技术
  • 简介:Theturtleshellisanamazingstructureoptimizedthroughthelong-termevolutionbynature.Thispaperreportstheexperimentalstudyonthemechanicalpropertyatdifferentlevelsandlocations,andthemicrostructureoftheshellfromTrachemysscripta(Red-earturtle)livinginSouthChina.

  • 标签: 微观结构 力学性能 鳖甲 红耳龟 中国南方
  • 简介:SHELLADAPTIVETRIANGULATIONOFTRIMMEDNURBSSURFACEWangHuichengZhangXinfangZhouJiAbstractThepaperpresentsanewapproachfortriangula...

  • 标签: trimmed SURFACE TRIANGULATION ADAPTIVE NC
  • 简介:很多溢出程序和后门工具都使用了远程Shell获取技术、这个技术一般都是通过管道实现的服务端程序运行后开一个端口,将Cmd.exe加载到内存,创建一个管道,把程序在端口上接收的数据通过管道送给Cmd。实现方法就是用CreateProcess来创建Cmd.exe这个进程,然后通过匿名管道(AnonymousPipe)来完成输入输出的重定向。大致方法都非常的普通,所以这里做为一种经典的技术和大家一起讨论。还是那句老话:希望新手朋友们能逐步提高。

  • 标签: 程序设计 C语言 服务器端程序 SHELL 面向对象
  • 简介:Windows提供了许多接口,可以根据这些接口扩展windowsshell的功能。但是,扩展shell对于许多人来说.还是一个比较神秘的内容.因为介绍它的资料太少了。为此,本刊特别组织一个关于怎样扩展shell的专题,相信读完后,有一定基础的读者都能依葫芦画瓢.编写出各种功能的shell扩展程序。

  • 标签: 接口扩展 功能 程序 开发 资料 编写
  • 简介:ThenucleiaroundmagicnumberN=126areinvestigatedinthedeformedrelativisticmeanfield(RMF)modelwitheffectiveinteractionsTMA.WefocusinvestigationsontheN=126isotonicchain.TheN=126shellevolutionisstudiedbyanalyzingthevariationsoftwo-neutron(proton)separationenergies,quadrupledeformations,singleparticlelevelsetc.Thegoodagreementoftwo-neutronseparationenergiesbetweenexperimentaldataandcalculatedvaluesisreached.TheRMFtheorypredictsthatthesizesofN=126shellbecomesmallerandsmallerwiththeincreasingofprotonnumberZ.However,theN=126shellexistsinourcalculatedregionallalong.Accordingtothecalculatedtwo-protonseparationenergies,theRMFtheorysuggests~(220)Puisatwo-protondrip-linenucleusintheN=126isotonicchain.

  • 标签: 相对论平均场理论 演变 壳牌 质子数 分离能 计算值
  • 简介:Wesystematicallyanalyzetheexperimentaldataofalphadecayineven-evenheavynucleifarfromstabilityandfindthattheGeiger-Nuttalllawbrea~sforanisotopicchainwhenitsneutronnumberisacrossamarcnumberorthereisadeformedsubshell.Thisbreakcanbeusedtoidentifynewmagicnumbersofsuperheavynuclei.Itisalsodiscoveredthatthereisanewlinearrelationbetweenthelogarithmofhalf-lifeandthereciprocalofthesquarerootofdecayenergyforN=126andN=152isotones.Itcouldbeanewlawofalphadecayfornucleiwithmagicneutronnumbersbutthephysicsbehinditistobeexplored.Thesignificanceoftheseresearchesforthesearchofnewelementsisdiscussed.

  • 标签: Α衰变 壳层结构 幻数 超重元素 原子核物理
  • 简介:自从以前的世纪的中间,原子原子核的壳模型在集中的使用。很复杂的原子核的这个简单模型,提供对它的许多特征的量的描述。另外的特征从极端图画从小偏差列在后面。我们的朋友和使贡献精液到这的同事AkitoArima回答在原子核的磁性的时刻与Horie以他的著名论文开始[学监。Theor。Phys。11,509(1954)]。在下列,对一个简单例子的详细描述被考虑。它是在在407/2壳>Ca和48Ca并且在在48Ca和56Ni。结果表明壳模型的力量和优雅。他们显示出简洁怎么从复杂性产生。从简单的壳模型的小偏差怎么导致效果,在原子价,中子行动,也被显示出好像他们带电的充电。

  • 标签: 原子核 壳模型 复杂性 简洁 ARIMA 简单模型
  • 简介:WiththeincorporationoftotalLagrangiansmoothedparticlehydrodynamics(SPH)methodequationandmovingleastsquare(MLS)function,thetraditionalSPHmethodisimprovedregardingthestabilityandconsistency.BasedonMindlin-Ressinerplatetheory,theSPHmethodsimulatingdynamicbehaviorviaonelayerofparticlesisappliedtoplate'smid-plane,i.e.,aSPHshellmodelisconstructed.Finally,throughcomparativeanalysesonthedynamicresponseofsquare,stiffenedshellsandcylindricalshellsundervariousstrongimpactloadswithcommonfiniteelementsoftware,thefeasibility,validityandnumericalaccuracyoftheSPHshellmethodareverified.Consequently,furtherresearchesonSPHshellmaywellpavethewaytowardssolvingproblemsinvolvingdynamicplasticdamage,tearingorevencrushing.

  • 标签: SPH shell Total LAGRANGIAN equation Movingleast
  • 简介:Core-shellstructurednanosphereswithmesoporoussilicashellandNicore(denotedasNi@meso-SiO2)arepreparedthroughathree-stepprocess.MonodispersedNiprecursorsarefirstprepared,andthencoatedwithmesoporousSiO2.FinalNi@meso-SiO2spheresareobtainedaftercalcination.TheproductsarecharacterizedbyX-raypowderdiffraction,transmissionelectronmicroscopyandN2adsorption-desorptionmethods.Thesesphereshaveahighsurfaceareaandarewelldispersedinwater,showingahighcatalyticactivitywithaTOFvalueof18.5,andoutstandingstabilityinhydrolyticdehydrogenationofammoniaboraneatroomtemperature.

  • 标签: heterogeneous catalysis nickel hydrogen AMMONIA BORANE
  • 简介:我们建议被用来在single-j壳的Hamiltonian决定联合参数C的一个修改公式。与以前已知的公式比较,新公式改进在入侵者single-j层次和尼尔逊之间的协议。为在粒子转子模型以内的chiral乐队的研究,新联合参数将更加影响在马甲乐队之间切开的精力。

  • 标签: 耦合参数 壳模型 修正公式 粒子转子模型 哈密尔顿 尼尔森
  • 简介:Thispaperaimstoachieveanalysisandexperimentresultsthatrelatetomechanicscapabilityandstructuralparameterofaspecialsaddleshellofrevolution.Theoreticallyspeaking,thesaddleshellofrevolutionconsistsofatoroidalshellandasphericalshell.Theshellssimultaneousequationscanbesolvedwithharmoniousterms.Where,thefundamentalequationscanbesolvedbyasymptoticexponentialperturbationmethod.TheequationsofspecialsolutioncanbesolvedbyHovozhilovsspecialsolution.Thisnewideaisfromastudyofsomeexistingsolutionsofthetoroidalshell.Theresultshavebeenprovedbycomparedwithsomeexperimentalresults.Theexperimentsaimstostudytheeffectcausedbychangeofmaterialparameter,orbychangeofdifferentgeometricdimensionsofthesaddleshell,whichincludethechangeofthickness,thechangeofradiusofshell,andthechangeofribs.Finally,theacceptedproductofthesaddleshellwerereinforcedbyatoroidalribhasbeensubmitted.

  • 标签: 潜艇结构 船舶外壳 环形壳 球形壳 微扰理论
  • 简介:Thispapergivesanexactanalysisofarotatingpiezoelectricsphericalshellwitharbitrarythickness.Atfirst,threedisplacementfunctionsareintroducedtosimplifythebasicequationsofasphericallyisotropic,piezoelectricmedium.Byexpandingthedisplacementfunctionsaswellastheelectricpotentialintermsofsphericalharmonics,thebasicequationsofequilibriumareconvertedtoanuncoupledEulertype,secondorderordinarydifferentialequationandacoupledsystemofthreesecondorderordinarydifferentialequations.Ageneralsolutiontothehomogeneousequationsofequilibriumisthenderived.Thestaticanalysisofarotatingsphericalshellisthenperformedandnumericalexampleispresented.

  • 标签: PIEZOELECTRIC medium SPHERICAL ISOTROPY DISPLACEMENT function
  • 简介:Experimentalstudyoninitiationofbivalveshellmotiononahorizontalsandbed,underaunidirectionalflowofwater,ispresented.Experimentswerecarriedoutinaflumewiththreetypesofbivalveshells,namelyCoquinaClam,Cross-barredChioneandPonderousArk,totesttheconditionforinitiationofmotion.Theshapeparametersofbivalveshellsaredefinedappropriately.Experimentswereconductedinaflumewithahorizontalbed,andthecriticalshearstresseswereestimatedusingVanoni'sside-wallcorrection.Thecharacteristicparametersaffectingtheinitiationofshellmotiononahorizontalbedinrough-turbulentregimeidentifiedbasedonthephysicalreasoninganddimensionalanalysisaretheShieldsparameter(nondimensionalcriticalshearstress),nondimensionalcompetentmeanvelocity,nondimensionalsandroughness,nondimensionalflowdepthandshapeparameter.EquationsofShieldsparameterandnondimensionalcompetentmeanvelocityfortheinitialmovementofshellsonahorizontalsandbedwithconvexupwardanddownwardconditionsareobtainedusingexperimentaldata.

  • 标签: BIVALVE shells Incipient motion SEDIMENT transport
  • 简介:合成氨工业,从开始建立到现在已经历了80余年历史,对于原料的来源和气化加工的方法,一直是研究开发的要对象。现在已经可以使用各种不同的固态、液态及气态可燃物作为制氢原料,以及与之相应的气体净化方法,来制造所氢氮气体供合成使用。在解决了上述这些问题之后,当今世界最关注的能源问题,又摆在合成氨工业的面前。

  • 标签: 合成氨 SHELL粉煤气化 工艺流程 天然气
  • 简介:Sincecannondrumofagileshell-feedingsystemrotatesfrequentlyandintermittently,itsmotionmustbesteady.Outlineofdrivingcamdeterminesthemotionofcannondrum,soitisnecessarytoselecttheproperoutlineofcam.Throughanalysisofparabolicoutlineandcycloidoutlineofthecams,theoutlinethatcombinesthetwocurvesisobtained.Accordingtothedemandofproduction,thevalueoftheoutlineisrevised,andthenthemethodoffittingcurveisusedtogettheexpressionoftheangleofcamandthedisplacementofthedrivenpart.Throughanalyzingthemotionofthecannondrum,itissuggestedthattheangleofthecamisproportiontothedisplacementofthedrivenpart.Thecamwiththespeciallyderivedoutlinecanmovesteadily.

  • 标签: 加农炮 凸轮 炮弹 技术指标 结构设计