简介:~~
简介:AnearthquakewithMS5.8occurredon10March2011inYingjiangcounty,westernYunnan,China.Thisearthquakecaused25deathsandover250injuries.Inordertobetterunderstandtheseismotectonicsintheregion,wecollectedthearrivaltimedatafromtheYunnanseismicobservationalbulletinsduring1Januaryto25March2011,andpreciselyhand-pickedthearrivaltimesfromhigh-qualityseismogramsthatwererecordedbythetemporaryseismicstationsdeployedbyourInstituteofCrustalDynamics,ChinaEarthquakeAdministration.Usingthesearrivaltimes,werelocatedalltheearthquakesincludingtheYingjiangmainshockanditsaftershocksusingthedouble-differencerelocationalgorithm.OurresultsshowthattherelocatedearthquakesdominantlyoccurredalongtheENEdirectionandformedanupside-downbow-shapedstructureindepth.ItisalsoobservedthataftertheYingjiangmainshock,someaftershocksextendedtowardtheSSEoverabout10km.TheseresultsmayindicatethattheYingjiangmainshockrupturedaconjugatefaultsystemconsistingoftheENEtrendingDaYingjiangfaultandaSSEtrendingblindfault.Suchstructuralfeaturescouldcontributetoseverelyseismichazardsduringthemoderate-sizeYingjiangearthquake.
简介:背景:随着技术的发展,不同种类颅骨修补材料性能及临床应用效果不尽相同,很多修补材料因自身的种种缺点已经被淘汰,新型的生物材料仍在进一步开发。目的:探讨颅骨修补材料的研究进展及数据分析结果。方法:SCI数据库中2002/2011检索有关生物材修复颅骨缺损文献,检索词为"颅骨缺损(skulldefect);修补(repair);复合材料(material);钛网(titaniumplate);骨水泥(bonecement);自体骨(autogenousbone);硅橡胶(siliconerubber);有机玻璃(organicglassor"pmma"orpolymethylmethacrylate)",共检索文献242篇。结果与结论:颅骨缺损的修复材料甚多,疗效不一,目前主要有自体骨、异体骨、医用高分子材料、钛金属材料、骨水泥以及组织工程复合材料等,采用何种修补材料能将颅骨缺损修复的更加完美是当前国内外学者研究的热点。
简介:正~~