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15 个结果
  • 简介:HL-2AisthefirsttokamakwithdivertorinChina.TheobjectivesofHL-2Aaretoproducemoreadaptabledivertorconfigurationstostudyenergyexhaustandimpuritycontrol,andtostudyenhancedcoreplasmaconfinementbyprofilecontrolandmoderateplasmashaping.HL-2Ahaswelloptimizedoperationalflexibilityandexcellentaccessi-bilityforthediagnosticsystemstofacilitatevariousplasmaexperiments.

  • 标签: HL-2A 托卡马克装置 结构设计 等离子体物理学 涡轮分子泵
  • 简介:我们在场为构造最大地局部性的Wannier的一个一般方法工作。它由三步组成:拣局部性的试用波浪功能的(i),(ii)执行完整的乐队设计,并且(iii)有L的orthonormalizing?wdin方法。我们的方法能够没有进一步的最小化,生产最大地局部性的Wannier功能,并且没有使用supercells,它能正直地被用于随机的潜力。我们的方法的有效性为简单乐队和合成乐队被表明。

  • 标签: r函数 局域化 构造 试探波函数 正交化方法 本地化
  • 简介:DesignandConstructionofRIBLL1ExperimentalSetupatHIRFL¥GuoZhongyan;ZhanWenlong;ZhouJianqun;ZhaoYouxiong;WangJinchuan;L...

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  • 简介:Thispaperdealswiththedesignandperformanceanalysisofthetransmissionprecoderoptimizationformultiple-inputmultiple-output(MIMO)systemswithlimitedfeedbackofchannelstateinformation(CSI).Weassumethatthereceivercangetperfectchannelknowledgebychannelestimationwhilethetransmitteronlyhaspartialchannelknowledgefromlimitedfeedback.Wepresentaminimummeansquareerror(MMSE)criterionbasedcodebookconstructionalgorithmforMIMOpre-codedspatialmultiplexingsystemsunderaspecificaveragepowerconstraint.Theoptimaltransmitterstructureisemployedinthispaper.SimulationresultsshowthattheMMSEcriteriabasedcodebookconstructionalgorithmwithhybriddesignofpowerallocationandprecodingcanachievebetterperformancethanthatofequalpowerallocationbasedcodebookofpreviousresearch.

  • 标签: 移动通信 电报 密码本 反馈技术
  • 简介:ThispaperappliestheEXP-functionmethodtofindexactsolutionsofvariousnonlinearequations.Tzitzeica-Dodd-Bullough(TDB)equationwasselectedtoillustratetheeffectivenessandconvenienceofthesuggestedmethod.Moregeneralizedsolitonarysolutionswithfreeparameterswereobtainedbysuitablechoiceofthefreeparameters,andalsotheobtainedsolitonarysolutionscanbeconvertedintoperiodicsolutions.

  • 标签: 非线性方程 孤波解 周期解 EXP函数法
  • 简介:Today,e-mailhasbecomepartofcommunication,andisthecoreofinformationpublicationamongtheenterprises.Soastocanreachtherapid,low-costandreliableemaildemand,manycompaniesandindividualsusetheserviceofferedbyLinuxasthesolutionsatisfyingthedemands.SondmailisafreewarewhichactsasmailserverinLinux.Theage-olddevelopmenthistoryofSendmailensuresitstransplantability,stabilityandthetechniquesupport.

  • 标签: 电子邮件 传递服务器 SENDMAIL LINUX 技术支持
  • 简介:Thesuppressionoftherecombinationofelectronsandholes(e–h)andtheenhancementofthelightabsorptionofsemiconductorsaretwokeypointstowardefficientphotocatalyticdegradation.Here,wereportafew-layerg-C3N4/α-MoO3nanoneedles(flg-C3N4/α-MoO3NNs)all-solid-stateZ-schememechanismphotocatalystsynthesizedviaatypicalhydrothermalmethodinacontrolledmanner.Therecombinationofthephoto-inducede–hpairscouldbeeffectivelyrestrainedbytheZ-schemepassagewaybetweentheflg-C3N4andα-MoO3NNsinthecomposite,whichcouldalsopromiseahighredoxabilitytodegradepollutants.Anditbecamepossibleforthepreparedphotocatalysttoabsorblightinawiderangeofwavelengths.Thedetailedmechanismwasstudiedbyelectronspin-resonancespectroscopy(ESR).Thelow-dimensionalnanostructureofthetwoconstituents(α-MoO3NNswithone-dimensionalstructureandflg-C3N4withtwo-dimensionalstructure)endowedthecompositewithvarietiesofexcellentphysicochemicalproperties,whichfacilitatedthetransferanddiffusionofthephotoelectronsandincreasedthespecificsurfaceareaandtheactivesites.The10wt%flg-C3N4/α-MoO3NNsshowedthebestphotocatalyticperformancetowardRhBdegradation,therateofwhichwas71.86%,~2.6timeshigherthanthatofα-MoO3NNs.

  • 标签: Flg-C3N4 α-MoO3 NANONEEDLES ALL-SOLID-STATE Z-scheme mechanism