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500 个结果
  • 简介:nVIDIA这两年的产品线发展得相当奇怪。曾经备受瞩目的中端主力产品Geforce4MX居然无法支持DirectX8API,性能甚至全面不如Geforce3Ti。这一“历史遗留问题”发展下来直接导致如今显卡市场时常出现奇怪的局面:古董级的Geforce4Ti成为“香饽饽”,成为行情报价的热点。商家推波助澜的炒作之下,很多人都以为无论Geforce4MX4000,还是GeforceFX5200/5600,都不如Geforce4TiGeforce4Ti果真那么神奇吗?我们来揭穿其性价比的神话。

  • 标签: 显卡 显存频率 GEFORCE4 TI GEFORCE4 MX
  • 简介:随着显卡技术的日益发展,其价格也日益提高。新购买的电脑中,花在显卡上的钱所占的比例越来越大,而且显卡对于电脑性能的影响也达到了前所未有的高度。对这样一块长方形的板卡可能大家都能说出个GeForce、Radeon来,但是你知道它除了图形芯片之外还有哪些其他的元件,这些元件是做什么的幺。不知道?没关系,让本文来告诉你。(本文的图片以Ti4600为例)

  • 标签: 显卡 GEFORCE4 TI4600 图形芯片 显存
  • 简介:公司简介:NVIDIA公司总部位于美国加州圣克拉拉,它在个人和专业计算机的高级图形和多媒体处理技术领域处于全球领导地位。在二维、三维图形处理、视频和多媒体等领域技术实力雄厚,能够在基于PC应用的图形处理技术中实现出色的处理性能和杰出的图形效果,业已成为全球领先的半导体公司之一。

  • 标签: GEFORCE4 显卡 图形处理器 抗锯齿技术 计算机
  • 简介:Vanadiumalloys(V-Cr-Tiseries)areimportantcandidatematerialsforblanketcomponentsoffusionreactorsduetotheirlowactivationandhighstrengthatelevatedtemperatures.Low-temperatureirradiationembrittlementdeterminestheoperationtemperaturelimitofVanadiumalloysfortheapplicationtostructuralmaterialsoffusionreactorsirradiationresponseofvanadiumalloysneedstobeclarifiedfortheirapplication.Inthepresentstudy,specimensoftwoalloys(V-4Cr-4TiandV-5Cr-5Ti)wereirradiatedwithenergeticHeionsandheavyionstounderstandhardeningofthealloysduetoheliumaccumulationandcascadedamageproduction.

  • 标签:
  • 简介:Er^3+-dopedSrBi4Ti4O15-Bi4Ti3O12(SBT-BIT-xEr^3+,x=0.00,0.05,0.10,0.15and0.20)inter-growthceramicsweresynthesizedbythesolid-statereactionmethod.Structural,electricalandup-conversionpropertiesofSBT-BIT-xEr^3+wereinvestigated.Allsamplesshowedasinglephaseoftheorthorhombicstructure.RamanspectroscopyindicatedthattheEr^3+substitutionforBi^3+atAsitesofthepseudo-perovskitelayerincreasesthelatticedistortionofSBT-BIT-xEr^3+ceramics.ThesubstitutionofBi^3+byEr^3+leadstoadecreaseofdielectriclosstanδandanincreaseofconductivityactivationenergy.Piezoelectricconstantd33wasslightlyimproved,butdielectricconstantwasdecreasedwiththeEr^3+doping.TheSBT-BIT-xEr^3+ceramicwithx=0.15exhibitstheoptimizedelectricalbehavior(d33~17pC/N,tanδ~0.83%).Moreover,twobrightgreen(532and548nm)andonered(670nm)emissionbandswereobservedunderthe980nmexcitation.Optimizedemissionintensitywasalsoobtainedwhenx=0.15fortheSBT-BIT-xEr^3+ceramic.Therefore,thiskindofceramicsoughttobepromisingcandidatesformultifunctionaloptoelectronicapplications.

  • 标签: inter-growth structure ELECTRICAL property multifunctional optoelectronic
  • 简介:在年初的第一期杂志中.我们刊登过GeForce2Ultra的测试文章,而这期给大家奉献的是GeForce3的测试文章.时间刚好相隔6个月.没想到nVIDIA的6个月新品推出计划在《电脑自做》上也得到了体现:)。

  • 标签: GEFORCE3 GEFORCE2 电脑 测试 新品 文章
  • 简介:Therearemoreandmorecountriestoakeanefforttothestudiesofvanadiumalloyforfusionapplication.NIFSinJapanhasrecentlydevelopedan80kgheatV4Cr4Tialloy(NIFS-heat2)aftertheproductionofa500kgscaleV4Cr4TiinU.S.severalyearsago.PropertyevaluationofthealloyhasbeenputintoaninternationalcollaborationprogramunderthecoordinationofIEA(InternationalEnergyAgency).SWIPhasjoinedthecollabrationonthehydrogenembrittlementresistanceevaluationofthealloyt.

  • 标签: 钒合金 氢脆变 阻抗 NIFS