简介：BackgroundProstheticmitralvalvereplacementisacommonsurgicaltreatmentofmitralvalvedisease.Completevideo-assistedmitralvalvereplacementrepresentsthecontemporaryminimallyinvasivecardiacsurgeryinvalvediseasesurgicaltherapy.Inthefieldofminimallyinvasivecardiacsurgery,thesuccessoftheoperationislargelydependingonsurgicalincision,italsoreflectsthesurgeon'stechniquelevel.MethodFromFebruary2010toFebruary2013,80casesofcardiacpatientswithmitralvalvepathologicalchangesinourdepartmentwhohadreceivedsurgicaltreatmentofcompletevideo-assistedmitralvalvereplacementwererecruited,theyweredividedintotwogroupsaccordingtothesurgicalincision:midclaviculargroup(Mgroup,n=50)andparasternalgroup(Pgroup,n=30).Theclinicaldatawererecordedincluding:cardiopulmonarybypasstime,aorticclampingtime,volumeofthoracicdrainageafteroperation,ICUtrachealintubationtime,postoperativedaysofhospitalstayandtimeforobservingthepostoperativecomplications.Thecomparisonbetweentwogroupswasperformedusingt-testanalysis.ResultBothMGroupandPGrouphadfavorablesurgicalview,therewerenoemergencysituationofredomediansternotomyduringinitialoperativeperiodorintraoperativedeath,nopericardialtamponade,noinfection,andnootherseriouspostoperativecomplications.Whereas,therewere2casesofredooperationforstanchbleedinginMGroupand1caseofperivalvularleakageinPGroup.Nevertheless,3monthslater,theresultofreexamineshowedthattheperivalvularleakagehadvanished.Theclinicaldatawasshownasfollow(MGroupvs.PGroup):cardiopulmonarybypasstime(90.2±28.7vs.87.3±24.5min,P>0.05),aorticclampingtime(65.2±17.4vs.68.6±21.9min,P>0.05),1stdayvolumeofthoracicdrainageafteroperation1(75.8±35.6vs.53.2±25.6mL,P>0.05),ICUtrachealintubationtime(9.6±3.4vs.8.4±4.5hours,P>0.05),postoperativedaysofhospitalstay(7.3±2.2v

简介：Objective:Toevaluatetheshort-termoutcomesofvideo-assistedthoracicsurgery(VATS)forthoracictumors.Methods:Thedataof1,790consecutivepatientswereretrospectivelyreviewed.ThesepatientsunderwentVATSpulmonaryresections,VATSesophagectomies,andVATSresectionsofmediastinaltumorsorbiopsiesattheCancerInstitute&Hospital,ChineseAcademyofMedicalSciencesbetweenJanuary2009andJanuary2012.Results:Therewere33patientsconvertedtoopenthoracotomy(OT,1.84%).Theoverallmorbidityandmortalityratewas2.79%(50/1790)and0.28%(5/1790),respectively.TheoverallhospitalizationandchesttubedurationwereshorterintheVATSlobectomygroup(n=949)thanintheopenthoracotomy(OT)lobectomygroup(n=753).Therewerenosignificantdifferencesinmorbidityrate,mortalityrateandoperationtimebetweenthetwogroups.Intheesophagealcancerpatients,nosignificantdifferencewasfoundinthenumberofnodaldissection,chesttubeduration,morbidityrate,mortalityrate,andhospitallengthofstaybetweentheVATSesophagectomygroup(n=81)andopenesophagectomygroup(n=81).However,theoperationtimewaslongerintheVATSesophagectomygroup.Inthethymomapatients,therewasnosignificantdifferenceinthechesttubeduration,morbidityrate,mortalityrate,andhospitallengthofstaybetweentheVATSthymectomygroup(n=41)andopenthymectomygroup(n=41).However,theoperationtimewaslongerintheVATSgroup.ThemediantumorsizeintheVATSthymectomygroupwascomparablewiththatintheOTgroup.Conclusions:Inearly-stage(I/II)non-smallcelllungcancerpatientswhounderwentlobectomies,VATSiscomparablewiththeOTapproachwithsimilarshort-termoutcomes.Inpatientswithresectableesophagealcancer,VATSesophagectomyiscomparablewithOTesophagectomywithsimilarmorbidityandmortality.VATSthymectomyforMasaokastageIandIIthymomaisfeasibleandsafe,andtumorsizeisnotcontraindicated.Longerfollow-upsareneededtodete

简介：Objective:Theobjectiveofthecurrentstudywastoevaluatethefeasibilityandsafetyofnonintubateduniportalvideo-assistedthoracoscopicsurgery（VATS）forthemanagementofprimaryspontaneouspneumothorax（PSP）.Methods:FromNovember2011toJune2013,32consecutivepatientswithPSPweretreatedbynonintubateduniportalthoracoscopicbullectomyusingepiduralanaesthesiaandsedationwithoutendotrachealintubation.Anincision2cminlengthwasmadeatthe6thintercostalspaceinthemedianaxillaryline.Thepleuralspacewasenteredbybluntdissectionforplacementofasoftincisionprotector.Instrumentsweretheninsertedthroughtheincisionprotectortoperformthoracoscopicbullectomy.Datawerecollectedwithinaminimumfollow-upperiodof10months.Results:Theaveragetimeofsurgerywas49.0min（range,33-65min）.Nocomplicationswererecorded.Thepostoperativefeedingtimewas6h.Themeanpostoperativechesttubedrainageandhospitalstaywere19.3hand41.6h,respectively.Thepostoperativepainwasmildfor30patients（93.75%）andmoderatefortwopatients（6.25%）.Norecurrencesofpneumothoraxwereobservedatfollow-up.Conclusions:Theinitialresultsindicatedthatnonintubateduniportalvideo-assistedthoracoscopicoperationsarenotonlytechnicallyfeasible,butmayalsobeasafeandlessinvasivealternativeforselectpatientsinthemanagementofPSP.ThisisthefirstreporttoincludetheuseofanonintubateduniportaltechniqueinVATSforsuchalargenumberofPSPcases.Furtherworkanddevelopmentofinstrumentsareneededtodefinetheapplicationsandadvantagesofthistechnique.

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简介：AbstractBackground:The first-line treatment for lung cancer is surgical resection, and one-lung ventilation (OLV) is the most basic anesthetic management method in lung surgery. During OLV, inflammatory cytokines are released in response to the lung tissue damage and promote local and contralateral lung damage through the systemic circulation. We designed a randomized, prospective study to evaluate the effect of the urinary trypsin inhibitor (UTI) ulinastatin on the inflammatory response after video-assisted thoracic lobectomy in patients with lung cancer.Methods:Adult patients aged 19 to 70 years, who were scheduled for video-assisted thoracic lobectomy surgery to treat lung cancer between May 2020 and August 2020, were enrolled in this randomized, prospective study. UTI (300,000 units) mixed with 100 mL of normal saline in the ulinastatin group and 100 mL of normal saline in the control group was administered over 1 h after inducing anesthesia.Results:The baseline (T0) interferon-γ (IFN-γ)/interleukin-4 (IL-4) ratio was not different between the groups (6941.3 ± 2778.7 vs. 6954.3 ± 2752.4 pg/mL, respectively; P > 0.05). The IFN-γ/IL-4 ratio was significantly higher in ulinastatin group at 30 min after entering the recovery room than control group (20,148.2 ± 5054.3 vs. 6674.0 ± 2963.6, respectively; adjusted P < 0.017). Conclusion: Administering UTI attenuated the anti-inflammatory response, in terms of INF-γ expression and the IFN-γ/IL-4 ratio, after video-assisted thoracic surgery in lung cancer patients.Trial registration:Clinical Research Information Service of Korea National Institute of Health (CRIS), KCT0005533.

简介：与WiFi和3G/4G的快速的发展，人们趋于在移动设备上看录像。这些设备是无所不在的，但是有小存储器缓冲录像。作为结果，与传统的计算机相对照，这些设备加重内容供应商的网络压力。以前的研究使用CDN解决这个问题。但是它出租空间不能动态地在被调整的静态的租借机制让运作的费用高飞并且与不兼容动态地录像交货。在我们的学习，基于从Tencent录像的用户行为的彻底的分析，一个流行中国联机录像份额平台，我们识别二关键用户行为。第一，在一样的区域的大量用户趋于看一样的录像。第二，录像的流行分发符合Pareto原则，即，20%流行录像拥有的顶80%所有录像交通。把这些观察变成银子弹，我们在需求系统(CPA-VoD)上建议并且实现一个新奇帮助云、帮助同伴的录像。在系统，我们在象同伴群的一样的区域，并且在一样的同伴群组织用户，用户们能由分享他们的缓冲录像提供录像给另外的用户。而且，我们在云服务器缓冲10%很流行的录像进一步减轻网络压力。我们选择云服务者因为出租空间能动态地被调整，缓冲录像。根据从Tencent录像的真实数据集上的评估，CPA-VoD最优地减轻网络压力和操作费用，当仅仅20.9%交通被内容供应商满足时。

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简介：随着互联网的快速发展，网络游戏为越来越多的人所接受。青少年是一个特殊的网络游戏玩家群体，成为网络游戏玩家的“主力军”，他们的父母又是持怎样的态度呢？

简介：电视上看到一则某种牌子的电器之广告,内中有audio和video两个字,借贵刊一角谈一谈。不用说,这两个字都是和电器有关的。audio与“音”有关系,video则和“影”有关。audio是指由声音、机械、或电力所造成的频率(audiofrs-quency),具有这种频率的声波每秒钟振动十五至二万次,也就是所谓低周波,是人类所能听得见的。在电器制品中,andio特指电唱机、收音机或电视机的发音部分,平常人们所说的音响设备就叫audioequipment。因此,audio现用来泛指一般与音响有关的东西。

简介：[1]Ci,S.,Sharif,H.,2002.AVariableDataRateSchemetoEnhanceThroughputPerformanceofWirelessLANs.IEEECSNDSP.[2]Doufexi,A.,Armour,S.,Butler,M.,Nix,A.,Bull,D.,2001.AstudyoftheperformanceofHiperlan/2andIEEE802.11aphysicallayers.IEEEVTC,1:668-672.[doi:10.1109/VETECS.2001.944927][3]Doufexi,A.,Armour,S.,Karlsson,P.,Butler,M.,Nix,A.,Bull,D.,2002.AcomparisonoftheHiperlan/2andIEEE802.11aWirelessLANstandards.IEEECommunicationsMagazine,40(5):172-180.[doi:10.1109/35.1000232][4]Ferré,P.,Doufexi,A.,Chung-How,J.,Nix,A.,Bull,D.,2003.LinkAdaptationforVideoTransmissionoverCOFDMBasedWLANs.IEEESCVT.Eindhoven.[5]Girod,B.,Kalman,M.,Liang,Y.,Zhang,R.,2002.Advancesinchannel-adaptivevideostreaming.JournalofWirelessCommunicationsandMobileComputing,2(6):573-584.[doi:10.1002/wcm.87][6]Haratcherev,I.,Langendoen,K.,2004.HybridRateControlforIEEE802.11.ACMInternationalWorkshoponMobilityManagementandWirelessAccess(MobiWac),Philadelphia.[7]Haratcherev,I.,Langendoen,K.,Lagendijk,I.,Sips,H.,2002.D3.16:Application-directedAutomatic802.11RateControl.GigaMobileProject,TUDelf,Tech.Rep.[8]Haratcherev,I.,Langendoen,K.,Lagendijk,R.,Sips,H.,2004.SNR-basedRateControlinWaveLAN.ASCI2004Conference.PortZelande.[9]Haratcherev,I.,Taal,J.,Langendoen,K.,Lagendijk,R.,Sips,H.,2005.AutomaticIEEE802.11ratecontrolforstreamingapplications.WirelessCommunicationsandMobileComputing,5(4):421-437.[doi:10.1002/wcm.301][10]Hoffman,C.,Manshaie,M.H.,Turletti,T.,2005.CLARA:Closed-LoopAdaptiveRateAllocationforIEEE802.11WirelessLANs.IEEEWirelessCom'.Hawaii.[11]Holland,G.,Vaidya,N.,Bahl,P.,2001.ARate-AdaptiveMACProtocolforMulti-HopWirelessNetworks.Mobicom.Rome.[12]H264software,2005.H.264/AVCSoftwareCoordination.http://bs.hhi.de/～suehring/tml/.[13]IEEE802.11,1999.Part11:WirelessLANMediumAccessControl(MAC)andPhysicalLayer(PHY)Specifications.[14]IEEE802.11a,1999.Part11:WirelessLANMediumAccessControl(MAC)andPhysicalLayer(PHY)Specific

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简介：Videoinlanguageteachingoffersexcitingpossi-bilitiestotrainlearners’communicativecompetence.Thisarticleintroducesfivedifferenttechniquesinus-ingvideointhelanguageclasssoastobringaboutin-teractionbetweenvideo,studentsandteacher.

简介：高效地利用单个说明的性能为录像编码的多重数据(SIMD)体系结构，有power-of-two存储器模块的并联存储器体系结构被建议。扭曲计划在水平、垂直的方向提供没有冲突的存取给邻近的元素(８位和16位数据类型)或与power-of-two间隔采用二篇小说，它不在以前的并联存储器体系结构是可能的。区域消费和延期评价与4，8和16个记忆模块分别地被给。在一种0.18-μm互补金属氧化物半导体技术下面，当读了并且写潜伏时，合成结果证明建议系统能以19k门的成本与16个记忆模块完成230MHz钟频率分别地是3和2个钟周期。我们在一个录像信号处理器(VSP)上实现建议并联存储器体系结构。VSP与建议建筑学提高了的结果表演为H.264完成1.28×加速即时译码。

简介：Thispaperpresentsahumandetectionsysteminavision-basedhospitalsurveillanceenvironment.Thesystemiscomposedofthreesubsystems,i.e.backgroundsegmentationsubsystem(BSS),humanfeatureextractionsubsystem(HFES),andhumanrecognitionsubsystem(HRS).ThecodebookbackgroundmodelisappliedintheBSS,thehistogramoforientedgradients(HOG)featuresareusedintheHFES,andthesupportvectormachine(SVM)classificationisemployedintheHRS.Bymeansoftheintegrationofthesesubsystems,thehumandetectioninavision-basedhospitalsurveillanceenvironmentisperformed.Experimentalresultsshowthattheproposedsystemcaneffectivelydetectmostofthepeopleinhospitalsurveillancevideosequences.

简介：Traditionalbackgroundmodelmethodsoftenrequirecomplicatedcomputations,andaresensitivetoilluminationandshadow.Inthispaper,weproposeablock-basedbackgroundmodelingmethod,anduseourproposedmethodtocombinecolorandtexturecharacteristics.Suppressionandrelaxationarethetwokeystrategiestoresistilluminationchangesandshadowdisturbance.Theproposedmethodisquiteefficientandiscapableofresistingilluminationchanges.Experimentalresultsshowthatourmethodissuitableforreal-wordscenesandreal-timeapplications.