简介：笔者是一个超级影迷，无论是最新大片还是经典老片都喜欢，现在也流行用MP4看电影．但是如果你的MP4播放器支持的格式不多咋办呢？找到一款支持格式多、并且转换速度和转换效果好的视频转换软件很必要，TolalVideoConvener就是一款很全面的转换软件，且操作简单。

简介：MeteoroidsenteringtheEarth'satmospherecancreatemeteortrailirregularityseriouslydisturbingthebackgroundionosphere.AlthoughnumerousobservationsofmeteortrailirregularitieswereperformedwithVHF/UHFcoherentscatterradarsinthepast,nosimultaneousradarandopticalinstrumentswereemployedtoinvestigatethecharacteristicsofmeteortrailirregularityanditscorrespondingmeteoroid.ByinstallingmultiplevideocamerasneartheSanyaVHFradarsite,anobservationalcampaignwasconductedduringtheperiodfromNovember2016toFebruary2017.Atotalof242opticalmeteorswithsimultaneousnon-specularechoesbackscatteredfromtheplasmairregularitiesgeneratedinthecorrespondingmeteortrailswereidentified.Agoodagreementbetweentheangularpositionsofnon-specularechoesderivedfromtheSanyaradarinterferometerandthoseofopticalmeteorswasfound,validatingthattheradarsystemphaseoffsetshavebeenproperlycalibrated.TheresultsalsoverifytheinterferometrycapabilityofSanyaradarformeteortrailirregularityobservation.Thenon-specularechoeswithsimultaneousopticalmeteorsweredetectedatmagneticaspectanglesgreaterthan~78°.Basedonthemeteorvisualmagnitudeestimatedfromtheopticaldata,itwasfoundthattheradarnonspecularechoescorrespondingtobrightermeteorssurvivedforlongerduration.Thiscouldprovideobservationalevidenceforthesignificanceofmeteoroidmassonthedurationofmeteortrailirregularity.Ontheotherhand,thesimultaneousradarandvideocommon-volumeobservationsshowedthatthereweresomecaseswithopticalmeteorsbutwithoutradarnon-specularechoes.Onepossibilitycouldbethatsomeoftheopticalmeteorsappearedatextremelylowaltitudeswheremeteortrailirregularitiesrarelyoccur.

简介：animemusicvideo简称AMV，在国内被翻译成动画音乐视频，视频中所采用的画面大都来自日本动画片或视频游戏截图，并配以适当的音乐。AMV的创作基本上属于一种民间行为，由动画爱好者自发创作，没有正式的发行机构，作品大多都是发布在相关的分享网上或者出现在动画协会举办的AMV大赛上。AMV大都是西方的动漫爱好者创作的，很大程度上只在西方的动漫迷中流行，而不是在日本动漫迷中。可以说AMV是MTV的衍生品，是西方文化与日本动漫产业的混血儿。

简介：Adconion公司于201O年4月15日宣布，旗下的Joost视频网络（JoostVideoNetwork）在二月份的comScoreVideoMetrix“资产百强”（Top100Properties）报告中首次上榜，名列第二。根据这份报告，Joost视频网络的唯一身份观看人数达到6700万，约占美国每月消费视频内容的全部互联网用户的38％。

简介：笔者是一个超级影迷，无论是最新大片还是经典老片都喜欢，现在也流行用MP4看电影，但是如果你的MP4播放器支持的格式不多咋办呢？找到一款支持格式多、并且转换速度和转换效果好的视频转换软件很必要，TotalVideoConverter就是一款很全面的转换软件，且操作简单。

简介：Withtherapidgrowthofwirelessbroadbandtechnologies,suchasWLANandWiMAX,qualitystreamingvideocontentsareavailablethroughportabledevicesanytime,anywhere.Thelayeredmulticastsystemusingscalablevideocodecshasbeenproposedasanefficientarchitectureforvideodisseminationtakingaccountofuserandlinkdiversities.However,inthewired/wirelesscombinedbest-effortbasedheterogeneousIPnetworkswhichprovidemorefluctuationinavailablebandwidthandend-to-enddelay,theperformanceofstreamingsystemshasbeengreatlydegradedduetofrequentpacketloss,resultingfromeitherwiredcongestionorwirelessfading/shadowing.Inthispaper,wepresentareal-timeembeddedpackettrainprobingschemeforestimatingend-to-endavailablebandwidthsoastoaccomplisheffectivecongestionanderrorcontrol.Thisisfacilitatedbyeffectiveclassificationofpacketlosssources,delaytrenddetectionalgorithmandflexibletransmissionrateofpackets.Undertheproperwirelesschannelmodellingandestimation,ourlayeredstructurecanallowappropriatesubscriptionofvideolayersandadaptivelyinsertnecessaryamountofforwarderrorcorrection(FEC)packetssoastoachieveQoSoptimizedsystemforscalablevideomulticasting.

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简介：ThispaperproposesanadaptivejointsourceandchannelcodingschemeforH.264videomulticastoverwirelessLANwhichtakesintoaccounttheusertopologychangesandvaryingchannelconditionsofmultipleusers,anddynamicallyallocatesavailablebandwidthbetweensourcecodingandchannelcoding,withthegoaltooptimizetheoverallsystemperformance.Inparticular,sourceresilienceanderrorcorrectionareconsideredjointlyintheschemetoachievetheoptimalperformance.Andachannelestimationalgorithmbasedontheaveragepacketlossrateandthevarianceofpacketlossrateisproposedalso.Twooverallperformancecriteriaforvideomulticastareinvestigatedandexperimentalresultsarepresentedtoshowtheimprovementobtainedbythescheme.

简介：Havingawiderangeofmotion,thecervicalspineisratherpredisposedtotrau-maandotherdisorderswithseriousconsequences.Themotionofcervicalspineisacomplexonecomposedofmicromotions,includinghorizontaldisplacementsalongallthreeaxesandrotationsaroundthemwithsixfreedomdegreesofmovement.Reportonprecisemeasurementofthethree-dimensionalmotionofthecervicalsectionof

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简介：在这篇文章，在包有损耗的网络上开始为一个H.264流录像的计划设计的一个时间空间的processing以后错误隐匿算法被介绍了。它瞄准优化恢复录像和常规客观度量标准的主观质量，山峰signal-to-noise比率(PSNR)，也在低延期和计算复杂性的限制下面，它对即时应用程序和便携式的设备批评限制了资源。明确地，它拿进运动的考虑物理性质完成更有意义的感性的录像质量。进一步，一条内容适应的双线性的空间插值途径和隐匿接近的一个时间的错误基于质地和运动活动分析在一个统一边界火柴标准下面被联合。广泛的实验证明了这个建议不仅在更好的重建的结果，客观地并且主观上与在到不同录像的更好的坚韧性的参考软件模型基准，而且结果定序比。

简介：Background:Activevideogames(AVGs)encouragewholebodymovementstointeractorcontrolthegamingsystem,allowingtheopportunityforskilldevelopment.Childrenwithautismspectrumdisorder(ASD)showdecreasedfundamentalmovementskillsincomparisonwiththeirtypicallydeveloping(TD)peersandmightbenefitfromthisapproach.ThispilotstudyinvestigateswhetherplayingsportsAVGscanincreasetheactualandperceivedobjectcontrol(OC)skillsof11childrenwithASDaged6–10yearsincomparisonto19TDchildrenofasimilarage.Feasibilitywasasecondaryaim.Methods:Actual(TestofGrossMotorDevelopment)andperceivedOCskills(PictorialScaleofPerceivedMovementSkillCompetenceforYoungChildren)wereassessedbeforeandaftertheintervention(6×45min).Results:Actualskillscoreswerenotimprovedineithergroup.TheASDgroupimprovedinperceivedskill.Allchildrencompletedtherequireddoseandparentsreportedtheinterventionwasfeasible.Conclusion:TheuseofAVGsasaplay-basedinterventionmaynotprovideenoughopportunityforchildrentoperformthecorrectmovementpatternstoinfluenceskill.However,playofsuchgamesmayinfluenceperceptionsofskillabilityinchildrenwithASD,whichcouldimprovemotivationtoparticipateinphysicalactivities.

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简介：AbstractBackground:Indocyanine green video angiography (ICG-VA) is a safe and effective instrument to assess changes in cerebral blood flow during cerebrovascular surgery. After ICG-VA, FLOW 800 provides a color-coded map to directly observe the dynamic distribution of blood flow and to calculate semiquantitative blood flow parameters later. The purpose of our study is to assess whether FLOW 800 is useful for surgery of complex intracranial aneurysms and to provide reliable evidence for intraoperative decision-making.Methods:We retrospectively reviewed patients with complex aneurysms that underwent microsurgical and intraoperative evaluation of ICG-VA and FLOW 800 color-coded maps from February 2019 to May 2020. FLOW 800 data were correlated with patient characteristics, clinical outcomes, and intraoperative decision-making.Results:The study included 32 patients with 42 complex aneurysms. All patients underwent ICG-VA FLOW 800 data provided semiquantitative data regarding localization, flow status in major feeding arteries; color maps confirmed relative adequate flow in parent, branching, and bypass vessels.Conclusions:FLOW 800 is a useful supplement to ICG-VA for intraoperative cerebral blood flow assessment. ICG-VA and FLOW 800 can help to determine the blood flow status of the parent artery after aneurysm clipping and the bypass vessels after aneurysm bypass surgery.

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：Thepaperfirstdiscussesshortcomingsofclassicaladjacent-framedifference.Secondly,basedontheimageenergyandhighorderstatistic(HOS)theory,backgroundreconstructionconstraintsaresetup.Underthehelpofblock-processingtechnology,backgroundisreconstructedquickly.Finally,backgrounddifferenceisusedtodetectmotionregionsinsteadofadjacentframedifference.TheDSPbasedplatformtestsindicatethebackgroundcanberecoveredlosslesslyinaboutonesecond,andmovingregionsarenotinfluencedbymovingtargetspeeds.Thealgorithmhasimportantusagebothintheoryandapplications.

简介：摘要：人教版高中英语新教材为响应新课标新增“看”技能培养的要求，在每个单元新增Video Time板块以突出“看”技能培养的必要性。因此，本文在分析Video Time板块的视频选择及其编排特点后，从“看”技能培养的教学要求和意义出发，以人教版（2019版）高中英语教材必修第二册Unit2 Wildlife Protection中Video Time板块的教学实践为例，尝试创设一系列看前、看中、看后活动，探索提升学生兴趣，培养学生视觉素养的教学方式。

简介：Thispaperpresentsamodel-basedapproximateλ-policyiterationapproachusingtemporaldifferencesforoptimizingpathsonlineforapursuit-evasionproblem,whereanagentmustvisitseveraltargetpositionswithinaregionofinterestwhilesimultaneouslyavoidingoneormoreactivelypursuingadversaries.Thismethodisrelevanttoapplications,suchasroboticpathplanning,mobile-sensorapplications,andpathexposure.Themethodologydescribedutilizescelldecompositiontoconstructadecisiontreeand...

简介：BTL-620HP彩转黑电源同步摄像机；BTL-5540银行柜员制高清晰彩色摄像机；BTL-5690超级宽动态摄像机；BTL-6085P高清晰彩色半球形摄像机；BTL-6880／18PHW一体化高速智能球形摄像机