简介：AnewlygrownBaGa4Se7crystalhasbeensynthesizedviatheBridgman-Stockbargertechnique.Thisnewcrystalhasadvantagesofhighnonlinearoptics(NLO)coefficients,highlaserdamagethresholds,andwidetransparentregions.TheBaGa4Se7crystalhasbrightapplicationprospectsasanonlineargainmediuminmid-infraredandterahertzregions.Inthispaper,thecrystallinestructureandsyntheticmethodoftheBaGa4Se7crystalareintroduced.Therefractiveindicesandabsorptioncoefficientsalongthreedielectricaxesbetween0.1THzand1.0THzarealsoobtained.Theterahertzdifferencefrequencygeneration(THz-DFG)characteristicsbasedontheBaGa4Se7crystalinthefrequencyrangeof0.1THzto1.0THzareanalyzedtheoreticallyandthephase-matchingconditionsarecalculated.TheapplicationofBaGa4Se7crystalsinterahertzwavegenerationisalsodiscussed.

简介：AlinearizationattackontheKeyStreamGenerator(KSG)ofthemodifiedE0algorithmproposedbyHermelin[ProceedingsofICISC'99,SpringerLNCS1787,2000,17-29]isgiveninthispaper.TheinitialvaluecanberecoveredbyalinearizationattackwithO(260.52)operationsbysolvingaSystemofLinearEquations(SLE)withatmost220.538unknowns.FrederikArmknecht[CryptologyePrintArchive,2002/191]proposedalinearizationattackontheKSGofE0algorithmwith0(270.341)operationsbysolvinganSLEwithatmost224.056unknowns,sothemodificationproposedbyHermelinreducestheabilityofE0toresistthelinearizationattackbycomparingwiththeresultsofFrederikAnnknecht.

简介：根据eNet硅谷动力报道：据通信产业界咨询机构DellOro集团的研究数据，无线局域网设备市场收人有望在2005年增长13％，达到26亿美元。这一市场将继续增长，在2009年规模达到43亿美元，复合年增长率达到13％。

简介：业界领先的SMT检测解决方案供应商Cyberoptics公司日前宣布，公司凭借全新的先进SPI系统SE500ULTRA荣膺由中国表面装贴协会授予的2012年华东和华南最佳创新展品大奖。SE500ULTRA系统带来了焊膏检测的新维度体验，该系统设计旨在实现最佳成效：高速度、更精确的可重复焊膏检测结果以及全新软件用户体验。

简介：2月23日消息，美国电话公司SBC和美国电话电报公司AT&T周二表示，他们已向美国联邦通讯委员会(FCC)递交申请，请求批准SBC以160亿美元收购AT＆T。

简介：WefabricatepolycrystallineCu(In,Ga)Se2(CIGS)filmsolarcellsonpolyimide(PI)substrateattemperatureof450°Cwithsingle-stageprocess,andobtainapoorcrystallizationofCIGSfilmswithseveralsecondaryphasesinit.Forimprovingitfurther,thetwo-stageprocessisadoptedinsteadofthesingle-stageone.AnextraCu-richCIGSlayerwiththethicknessfrom100nmto200nmisgrownonthesubstrate,andthenanotherCu-poorCIGSfilmwiththicknessof1.5-2.0μmisdepositedonit.Withthemodificationoftheevaporationprocess,thegrainsizeofabsorberlayerisincreased,andtheadditionalsecondaryphasesalmostdisappear.Accordingly,theoveralldeviceperformanceisimproved,andtheconversionefficiencyisenhancedbyabout20%.

简介：领先的SMT检测系统厂商CyberOptics公司目前宣布其SE500三维焊膏检测系统已经荣获2010年度EMAsia创新奖。

简介：Chalcopyrite-typeCuInSe2nanoparticlesaresuccessfullypreparedbyusingIn2Se3nanoparticlesasaprecursorreactedwithcopperchloride(CuCl)solutionviaaphasetransformationprocessinlowtemperature.Thereactiontimeisakeyparameter.Afterthereactiontimeincreasingfrom0.5hto8h,In2Se3andCuClreactwitheachothergraduallyviaphasetransformationintoCuInSe2withoutanyintermediatephase.ThecrystallinestructureandmorphologyoftheCuInSe2nanoparticlesarecharacterizedbyX-raydiffraction(XRD)andfieldemissionscanningelectronmicroscopy(FESEM).ThediameterofCuInSe2nanoparticleswithgooddispersibilityrangesfrom10nmto20nm.ThebandgapoftheCuInSe2nanoparticlesis1.04eVcalculatedfromtheultraviolet-visible(UV-VIS)spectrum.

简介：现年三十九岁的联想集团总裁兼首席执行官杨元庆，两年内，币领联想员工巩固中国电脑市场占有率第一的宝座，他的下一个目标是——挑战IBM、进军IT服务，矢志成为各项信息后端平台的制定者。究竟杨元庆要如何带领联想挑战IBM?

简介：2001年2月21日,国家环保总局对外经济合作领导小组办公室(甲方)与重庆川仪一厂(乙方)正式签署了ODS清洗剂消费淘汰合同书。我方作为2000年度签署合同的16家企业之一,经过两年的努力,现已完成合同书中规定的全部工作任务。三条生产线已投入正常运行,不仅解决了ODS清洗剂的替代问题,