简介：部分地，聪明切割的过程，缺陷由尺寸描绘了的结合的效果和在切开前后的内部压力上的2纸被使用破裂力学模型学习。有大尺寸的结合的缺陷是容易的引起缺点生长的严重偏差，这被发现，当切开时，导致薄层的一个非转移的区域。在结合的缺陷的内部压力是很小的一个实际聪明切割的过程，大界面的缺点总是在切开的过程支持缺点生长。同时，增加结合的缺陷的内部压力减少在切开前的缺点生长和它的偏差。stiffener限制的松驰的机制被建议澄清结合的缺陷的效果。而且，当结合的缺陷是在场的时，切开的过程的进步被分析。在切开以后，有大尺寸和高内部的压力的那些结合的缺陷在高温度的退火期间为薄电影的blistering是脆弱的。

简介：【摘要】：维修思想策略经历了定时维修到以可靠性为中心的维修（Reliability-Centered maintenance,以下简称RCM）变革，当前运输机已陆续开始进入到批量维修阶段，承修厂逐步开始推广RCM思想策略在维修工作中的应用。先进的维修检测技术可以更加深入、全面、高效的进行故障缺陷识别，提高维修质量及效率，是实现RCM思想在运输机维修工作应用的必要条件。

简介：Extractingrare-earthelementsfromcoalcouldsoonbeeconomicalinU.S.ExtractedfromthereportofUNIVERSITYPARK,Pa.TheU.S.couldsoondecreaseitsdependenceonimportingvaluablerare-earthelements,accordingtoateamofPennStateandU.S.DepartmentofEnergyresearcherswhofoundacost-effectiveandenvironmentallyfriendlywaytoextractthesemetalsfromcoalbyproducts.UsingbyproductsofcoalproductionfromtheNorthernAppalachianregionoftheU.S.,theteaminvestigatedwhetherachemicalprocesscalledionexchangecouldextractREEsinasafermannerthanotherextractionmethods.Resultsshowthationexchangeismoreenvironmentallyfriendlyandrequiresless

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简介：HighqualitynaturalmeteoriticmagnetsuccessfullyproducedinashorttimeSource:websiteofTohokuUniversityResearchersfromTohokuUniversityinJapanhavesucceededinproducingacompletelyrare-earthfreehigh-qualityFeNimagnet.Theteam,ledbyProfessorAkihiroMakinoasprincipalinvestigatorissupportedbyaMEXT(MinistryofEducation,Culture,Sports,ScienceandTechnology,Japan)projectentitled,"Ultra-low

简介：Square是Twitter的创始人之一JackDorsey新创立的一个项目，让人们可以利用智能手机进行信用卡支付。这项创新将极大地改变现有的交易方式。《新货币》一文带我们了解Square的方方面面。

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简介：Astrongdelegationof12membersheadedbyProf.Dr.lng.BrunoMueller,theVicePresidentandmem-beroftheBoardofthePowerTransmissionandDistributionGroupofSiemensAGcametoChinaonOct.23,1991torunseminarsonSiemenstechnology,introducingsystematicallythetrendsandstate-of-the-artpracticesinpowertransmissionanddistributionsystems.ThedelegationwasontheinvitationoftheDepartmentofIn-ternationalCooperationofMinistryofEnergyandChinaElectricity

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简介：WhenIopenedmye-mailtheotherday,ablond（白肤金发碧眼的）womannamedRachelappearedonmycomputerscreen.

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简介：Terahertzwaves,sittinginthegapbetweenthemiddleinfraredandmillimeterwaveregions,areknownasthelastvacantareaoftheelectromagneticspectrumthathasnotquitebeenunderstoodandbroughtintoapplications.TheTerahertzregionhasbeenthefocusofresearchworldwidesinceearly1990s.Duetotheiruniquecharacteristics,

简介：Terahertzwaves,sittinginthegapbetweenthemiddleinfraredandmillimeterwaveregions,areknownasthelastvacantareaoftheelectromagneticspectrumthathasnotquitebeenunderstoodandbroughtintoapplications.TheTerahertzregionhasbeenthefocusofresearchworldwidesinceearly1990s.Duetotheiruniquecharacteristics,

简介：Terahertzwaves,sittinginthegapbetweenthemiddleinfraredandmillimeterwaveregions,areknownasthelastvacantareaoftheelectromagneticspectrumthathasnotquitebeenunderstoodandbroughtintoapplications.TheTerahertzregionhasbeenthefocusofresearchworldwidesinceearly1990s.Duetotheiruniquecharacteristics,Terahertztechnologieshaveawiderangeofapplications,suchashazarddetection,highspeeddatacommunications,radioastronomy,andbiomedicalimaging.

简介：Terahertzwaves,sittinginthegapbetweenthemiddleinfraredandmillimeterwaveregions,areknownasthelasvacantareaoftheelectromagneticspectrumthathasnotquitebeenunderstoodandbroughtintoapplications.TheTerahertzregionhasbeenthefocusofresearchworldwidesinceearly1990s.DuetotheiruniquecharacteristicsTerahertztechnologieshaveawiderangeofapplications,suchashazarddetection,highspeeddatacommunications

简介：Terahertzwaves,sittinginthegapbetweenthemiddleinfraredandmillimeterwaveregions,areknownasthelastvacantareaoftheelectromagneticspectrumthathasnotquitebeenunderstoodandbroughtintoapplications.TheTerahertzregionhasbeenthefocusofresearchworldwidesinceearly1990s.Duetotheiruniquecharacteristics,

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