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简介：近年,随着智能手机的广泛使用,越来越多的人开始接触并迅速地爱上微信。不可否认的是,微信已经在一定程度上改变着我们的生活。可不是吗,有事没事的刷刷微信已经成为了很多人的习惯。由于微信传播分享的途径非常便利,让海量的信息在朋友圈中广泛流传。在一个又一个的传言被辟谣后,让我们不禁感叹,微信难道只能微微一信吗?特别是一些关于健康、养生,甚至是一些急救的内容,究竟是否科学、可靠。为此,本刊特

简介：摘要处于互联网信息时代，计算机在社会领域的应用越来越广泛，而且人们也更加依赖互联网。所以，一旦出现网络通信安全问题，就很容易造成重大的损失。本文重点探究网络通信中的数据信息安全保障技术，以期为网络通信安全提供充分的保障。

简介：摘要ATM技术是一类以信元为单位的异步传输技术，目前已经在诸多通信技术领域广泛应用。本文首先简单介绍了ATM技术概况以及当前的民用航空通信环境，指出ATM技术技术在民用航空通信领域的优势，最后探讨了ATM技术应用方向以及应用模式，以供相关部门参考。

简介：摘要现代航海事业的安全保障在于是否具备可靠性较高的通信技术，不仅可以保障海上生命安全，更能稳定船舶安全航行。其中海事通信可以在保证船舶航行安全以及开发海洋资源过程中为人类提供优质的技术。对此，本文则从现代网络信息技术、现代数字海洋信息技术以及无线通信技术等分析其在海事通信中的具体应用，望给予相关研究者提供参考。

简介：电力系统的运行是建立在信息通信系统基础上的,只有保证信息通信的高效性及准确性,才能为电力系统的安全、平稳运行提供保障,为用户提供更高质量的用电。但是原有的电力信息通信系统中存在很多不足之处需要完善,而网络技术的快速发展,为构建电力信息网络通信系统创造了有利条件。文章介绍了电力信息通信网络现状,分析了电力信息通信中网络技术的应用及发展趋势。

简介：摘要随着科学技术的高速发展，电子通信为人们的生活和工作带来了极大的便利，但是在目前的电子通信过程中还存在着一些问题。基于此，本文对电子通信中常见的干扰要素做出分析和探讨，并提出针对这些干扰要素的控制措施，从而促进我国电子通信技术在故障检修和传输效率上的发展。

简介：根据人体信道特点,以FPGA为平台设计了一种适用于电流耦合型人体通信的全数字锁相位同步提取电路。仿真和测试的结果表明,该电路具有较好的相位跟踪性能,可以达到锁定时间短、相位抖动小、锁相精度高的结果,为讨论人体通信系统的实现与传输方式提供了有效保证。

简介：软件无线电是基于开放性、兼容性强的通用硬件平台，通过调用各种软件功能模块来灵活实现各种无线通信功能。其配置灵活、通过软件升级功能的优点决定了其未来的发展前景，本文对软件无线电的概念、关键技术、及其在军事上的应用进行了探讨，并对当前国内外软件无线电方面的发展做了介绍。

简介：电力通信专网是电力系统生产指挥和调度的载体，也为电力建设提供了支撑和保障，在电力系统可靠运行中起到重要作用。电力调度网是一个涉及供电所、变电站和调度中心等的电力通信专网，其稳定与可靠直接影响到电力系统的安全运行。目前，大部分的电力调度网都采用SDH组建传输骨干网、PCM组建业务终端的技术。

简介：传统的对流层散射通信设备存在体积大、功耗高、不易于机动等缺点，这些缺点较大程度的限制了对流层散射通信设备的应用。本文以对现有对流层通信设备技术参数分析为基础，设计基于高性能、高集成化AD9361芯片的新型对流层散射通信设备，实现对流层散射通信设备的小型化、低功耗、模块化、集成化，拓展对流层散射通信设备的应用方向。

简介：摘要电子通信行业的发展对现代社会的发展有着一定的影响，在电子通信行业的建设、发展和管理中，为了保证电子通信的质量，满足人们对信息获取和数据传输的要求，在开始前期做好准备工作，在实施阶段做好配置工作。目前存在配置干扰、硬件干扰和同频干扰的问题，提出解决方案，在不同的阶段进行落实，减少干扰因素影响电子通信的正常运行，进一步促进电子通信行业的发展。

简介：摘要近年来，人们对通信的需求日益增加，传统的通信方式已经不能满足当代人们的需求了。随着时代的发展，计算机网络技术不断取得进步与突破，成为现代社会中重要的信息传输手段。作为网络信息传输的关键技术，计算机通信技术具有良好的抗干扰性，对于各种网络数据的传输与控制发挥着重要的作用。本文就计算机无线网络通信中的传输控制技术展开探讨。

简介：AIM:Toexploretheeffectofsaturatedhydrogensalineonbluelight-inducedretinaldamageinrats.·METHODS:Theretinaldamageofratswasinducedbybluelightexposurefor6hoursandexamined8hours,16hoursand24hoursaftertheexposure.OnehundredfemaleSprague-Dawleyratswererandomlydividedintofourgroups.Group1included30ratsreceivedlightexposurewithoutanyothertreatment.Group2included30ratsreceivedlightexposurewithintraperitonealinjectionofnormalsaline.Group3included30ratsreceivedlightexposurewithintraperitonealinjectionofsaturatedhydrogensaline.AndGroup4includedtheother10ratswhichdidnotreceiveanytreatment.Theamountofintraperitonealinjectionofsaturatedhydrogensalineandnormalsalinewascalculatedintheratioof1ml/100gofratweight.SpecimenswerecollectedandprocessedbyH-Estaining,ultrastructureobservation,biochemicalmeasurement.Morphologicalchangeswereobservedbylightmicroscopeandtransmissionelectronmicroscope(TEM)andtheretinalouternuclearlayer(ONL)thicknesswasmeasuredbyIPP6.0,whilethemalondialdehyde(MDA)wasmeasuredbycolorimetricdeterminationat532nm.·RESULTS:AlthoughthestructureofretinainGroup1andGroup2wasinjuredheavily,theinjuryinGroup3wasmild.ThedifferencesbetweenGroup1andGroup2werenotsignificant.ComparedwiththeratsinGroup1andGroup2,theonesinGroup3hadmoreclearlydemarcatedretinastructureandmoreorderedcellsbylightmicroscopeandTEMobservation.TheONLthicknesses(400times)offourgroupsateachtimepointexceptbetweenGroup1andGroup2weresignificantlydifferent(P<0.05).ThethicknessesoftheONLinGroup1atthreetimepointswere30.41±4.04μm,26.11±2.82μmand20.63±1.06μm,inGroup2were31.62±4.54μm,25.08±3.63μmand19.07±3.86μm,inGroup3were29.75±3.62μm,28.83±1.97μmand27.61±1.83μm.InGroup4themeanofthethicknesswas37.35±1.37μm.Astimewentby,thedamageg

简介：AIM:Anaerobicbacteriacancauseocularinfections.WetestedtheOxyPlateTMAnaerobicSystem(OXY)toisolatepertinentanaerobicbacteriathatcancauseoculardisease.METHODS:OXY,whichdoesnotrequiredirectanaerobicconditions(i.e.bags,jars),wascomparedtoconventionalisolationofincubatingculturemediainanaerobicbags.Standardcoloniescountswereperformedonanaerobicocularbacterialisolatesunderaerobicandanaerobicconditions(anaerobicbags)usingagarmedia:1)OXY(aerobiconly),2)5%sheepblood(SB),3)Chocolate,and4)Schaedler.Thebacteriatestedwerede-identifiedocularisolatesculturedfromendophthalmitisanddacryocystitisthatinclude10Propionibacteriumacnesand3Actinomycesspecies.Thecolonycountsforeachbacteriaisolate,oneachculturingcondition,wererankedfromlargesttosmallest,andnon-parametricallycomparedtodeterminethebestculturingcondition.RESULTS:Allanaerobicconditionswerepositiveforalloftheanaerobicisolates.SBandSchaedler’sagarunderaerobicconditionsdidnotsupportthegrowthofanaerobicbacteria.SparsegrowthwasnotedonchocolateagarwithPropionibacteriumacnes.Asananaerobicsystem,SBinananaerobicbagisolatedhighercolonycountsthanOXY(P=0.0028)andchocolateagar(P=0.0028).CONCLUSION:AlthoughOXYdidnottesttobemoreefficientthanotheranaerobicsystems,itappearstobeareasonablealternativeforisolatinganaerobicbacteriafromocularsites.Theuseofanagarmediuminaspeciallydesignedplate,withouttherequirementofananaerobicbag,renderedOXYasanadvantageoverotheranaerobicsystems.

简介：AIM:TodiscusstheimpactofLyciumBarbarumPolysaccharide(LBP)andDanshensupurifiedfromTraditionalChineseMedicine(TCM)onvascularendothelialgrowthfactor(VEGF)ofrabbitswithretinalneovascularization.METHODS:Fortyrabbitsweredividedintonormalcontrolgroup,modelcontrolgroup,LBPgroupandDanshensugroup.Animalsinthenormalcontrolgroupwerefedinthenormaloxygenenvironment.Animalsintheotherthreegroupswereputintotheenvironmentwith70%oxygenfor5daysinordertobuildthemodelofoxygen-inducedvascularproliferationretinopathy.AndthendifferentTCMextractwasinjectedintotheabdominalcavitiesoftheseannimals.After7days,theVEGFcontentofintheserumofrabbitwasmeasuredbydoubleantibodysandwichmethod.RESULTS:DataanalysisindicatedthatVEGFcontentwasasfollows:Danshensugroupwaslowerthanmodelcontrolgroup(12.92±3.84ng/Lvs19.32±4.15ng/L,P<0.05);LBPgroupandnormalcontrolgroupwerelowerthanmodelcontrolgroup(12.92±3.84ng/L,9.26±1.61ng/Lvs19.32±4.15ng/L,P<0.01);totalbloodviscosity,plasmaviscosity,cholesterolcontent,fibrinogencontentandtriacylglycerolcontentafterperitonealinjectionofLBPandDanshensuwereobviouslylowerthanbeforeinjection.CONCLUSION:TCMextract-LBPandDanshensucanprominentlyreducethecontentofVEGFintheprocessofvascularproliferativeretinopathyofrabbit;canpreventtheoccurrenceofretinalmicrovasculardiseasebyimprovingpartialoxygen-deficientenvironmentoraffectingallkindsofnewgrowthfactor.

简介：AIM:TopresenttheresultsofimplantationofIakymenkokeratoprosthesisinfivepatientswithvascularizedcornealleukomacausedbysevereocularinjury.·METHODS:Iakymenkokeratoprosthesiswasimplantedinto5eyesof5patients:4patientsweresufferedfromchemicalburnsand1patientfromexplosiveinjury.Thepreoperativevisualacuityrangedfromlightperceptiontohandmotion.Theimplantationsurgerywascomposedoftwo-stageprocedures.Thefollow-upperiodwasfrom9monthsto11years.Theoutcomemeasureswerevisualacuity,retention,andcomplicationsofthekeratoprosthesis.·RESULTS:Visionimprovementswereachievedinmostpatients.Allkeratoprosthesiswereretainedwithinthefollow-upperiod.Cornealmeltingoccurredinonepatientandfibrousclosureinanotherpatient,bothofwhichweresuccessfullytreated.Retinaldetachmentoccurredinonepatientaftersurgery.·CONCLUSION:Iakymenkokeratoprosthesisseemstobeapromisingalternativeforthepatientswithseverecornealinjury,butfurtherinvestigationisneededtoevaluatetheroleofIakymenkokeratoprosthesis.

简介：AIM:Toinvestigatethefrequencyofidiopathicphacodonesis(IP)insenilecataractsubjectsandtheshort-termclinicaloutcomesfollowingcataractsurgery.METHODS:Thisinstitutionalcase-controlstudyincluded1301consecutivelow-incomecataractsubjectsfromJunetoNovember2009.Anteriorsegmentwerecarefullyevaluatedwithdilatedpupilunderslit-lamp.IPwerescreenedandgradedbyacriteriasetbytheauthors.Riskfactors,surgicaloutcomes,andoperativecomplicationswereanalyzed.RESULTS:Atotalof42subjects(3.2%)withIPwerediagnosedandclassifiedasgrade1(36subjects),grade2(5subjects)andgrade3(1subject).HarderlensesandintumescentcataractswereobservedintheIPgroupthanthecontrolgroup(P<0.05).Logisticsregressiontestalsoindicatedthemainriskfactorwasthehardnessofthelens.Theincidenceofzonulardialysisduringsurgerywas23.8%(10eyes),whichwassignificantlyhigherthanthecontrols(0.7%,P<0.001).Visualoutcomesofthetwogroupswerenotstatisticallyorclinicallysignificant.CONCLUSION:HardnucleusandintumescentcataractarerelatedtoIPinsenilecataractsubjectsinQinghai,China.Withmorecarebeingtaken,grade1andsomeofthegrade2IPsubjectsachievedsimilarsurgicaloutcomesascomparedtocontrols.

简介：<正>DirSir,IamdoctorGuo-YuanYang,fromtheDepartmentofOphthalmologyofWestChinaHospitalofSichuanUniversityinChengdu,SichuanProvince,China.Iwritetopresentacasereportofposteriorlentiglobuswithcataract.

简介：AIM:Toevaluatechangesintheanteriorchamberdepth(ACD),crystallinelensthickness(LT)anditsrefractivepowerafterlaserinsitukeratomileusis(LASIK).·METHODS:Inallcases,thepreoperativeandpostoperativecentralACDwhichweremeasuredwithPentacam,Orbscan,IOL-MasterandA-scanultrasonography,centralcornealtruenetpowerwhichwasmeasuredwiththePentacam,OrbscanandIOL-Master,axiallength(AL)whichwasmeasuredwithIOL-MasterandLTwhichwasmeasuredwiththeA-scanultrasonographywerecomparedusingthepairedsamplettest.OcularrefractiveerrorsandlensrefractivepoweratcornealplanewerecalculatedandtheircorrelationswerealsoevaluatedbeforeandafterLASIK.RESULTS:At1weekafterLASIK,LTandcrystallinelensrefractivepoweratcornealplane(Dlens)whichwereassociatedwiththeIOL-MasterandPentacamincreasedsignificantly(P≤0.005),ACDdecreasedsignificantly(P≤0.001),butnosignificantincreasewasobservedintheDlenswhichwasassociatedwiththeOrbscan(P=0.261).SignificantcorrelationsbetweenthechangesintheocularrefractiveerrorsandDlenswhichwereassociatedwiththePentacamwereobservedat1weekand6monthsafterLASIK(P=0.028;P=0.001).CONCLUSION:LTincreasedsignificantlyafterLASIK,andthismightpartiallyleadtoACDdecrease,Dlensincreaseandasmallquantityofmyopicregression.