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简介：Thetime-delaysignature(TDS)ofchaosoutputina1550nmvertical-cavitysurface-emittinglaser(VCSEL)subjecttofiberBragggrating(FBG)feedbackisinvestigatedexperimentally.Autocorrelationfunction(ACF)andmutualinformation(MI)areusedforquantitativelyidentifyingtheTDSofchaos.Forvariousbiascurrents,theTDSevolutionwiththefeedbackstrengthisdifferent,astheFBGprovideswavelength-selectivefeedback.Furthermore,basedontheTDSmapoftheFBGfeedbackVCSEL(FBGF-VCSEL)intheparameterspaceoffeedbackstrengthandbiascurrent,theoptimalTDSsuppressionregions,wherethedominantpolarizationmodeofFBGF-VCSELlocatesattheedgeofthemainlobeofFBGreflectionspectrum,havebeendetermined.Finally,forcomparativepurpose,theTDSofchaosinmirrorfeedbackVCSEL(MF-VCSEL)alsohasbeenpresented,andtheresultsshowthatanFBGF-VCSELpossessesbetterTDSsuppressionperformancethananMF-VCSEL.

简介：Thelow-resistanceinternalsoftheDRtypedouble-layeredmethanolsynthesisreactordevelopedbyShijiazhuangZhengyuanEquipmentCo.,Ltd.hasbeengrantedaChinesepatent.Currentlythisequipmentisunderinstallationand

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简介：Blindidentification-blindequalizationforFiniteImpulseResponse(FIR)MultipleInput-MultipleOutput(MIMO)channelscanbereformulatedastheproblemofblindsourcesseparation.Ithasbeenshownthatblindidentificationviadecorrelatingsub-channelsmethodcouldrecovertheinputsources.TheBlindIdentificationviaDecorrelatingSub-channels(BIDS)algorithmfirstconstructsasetofdecorrelators,whichdecorrelatetheoutputsignalsofsubchannels,andthenestimatesthechannelmatrixusingthetransferfunctionsofthedecorrelatorsandfinallyrecoverstheinputsignalusingtheestimatedchannelmatrix.Inthispaper,anewapproximationoftheinputsourceforFIR-MIMOchannelsbasedonthemaximumlikelihoodsourceseparationmethodisproposed.TheproposedmethodoutperformsBIDSinthepresenceofadditivewhiteGaussiannoise.

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简介：Inthispaper,weproposeandexperimentallyinvestigatealinearlypolarizednarrow-linewidthrandomfiberlaser(RFL)operatingat1080nmandboosttheoutputpowertokilowattlevelwithnear-diffraction-limitedbeamqualityusingamasteroscillationpoweramplifier.TheRFLbasedonahalf-openedcavity,whichiscomposedofalinearlypolarizednarrow-linewidthfiberBragggratinganda500mpieceofpolarization-maintainedGe-dopedfiber,generatesa0.71Wseedlaserwithan88pmfullwidthathalf-maximum(FWHM)linewidthanda22.5dBpolarizationextinctionratio(PER)forpowerscaling.Atwo-stagefiberamplifierenhancestheseedlasertothemaximal1.01kWwithaPERvalueof17dBandabeamqualityofM_x~2=1.15andM_y~2=1.13.NostimulatedBrillouinscatteringeffectisobservedattheultimatepowerlevel,andtheFWHMlinewidthoftheamplifiedrandomlaserbroadenslinearlyasafunctionoftheoutputpowerwithacoefficientofabout0.1237pm∕W.Tothebestofourknowledge,thisisthefirstdemonstrationofalinearlypolarizednarrow-linewidthRFLwithevenkilowatt-levelnear-diffraction-limitedoutput,andfurtherperformancescalingisongoing.

简介：由有固有的技巧此处，在房间膜上与高度选择的离子隧道和泵在液体从盐内容产生可观的bioelectricity的生物系统启发了一只充分不能生活的、单个杯子圆锥形的nanopores收获精力被表明。圆锥形的nanopores被显示出被取决于离子散开的方向的电解质集中坡度控制的否定地控告的玻璃里的离子当前的校正(ICR)。ICR的度与向前增加被提高集中差别。当集中坡度相对地被使用时，不平常的校正倒置被观察。有单个nanopore的最大的力量产量接近104 pW。这个灵巧、成本效率的收获精力的系统有潜力驱动干净精力的恢复种的微小的生物医学的设备或构造未来。

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简介：从1999年8至10月,2000年的4至6月,2002年8月至2003年9月,在平均树高为26米的长白山阔叶红松林内,用红外气体分析仪(2250D,LI-CORInc.和LI-COR,820)测定了不同高度的二氧化碳浓度。根据测定的数据,分析了阔叶红松林二氧化碳廓线的日变化和季节变化动态。结果表明:CO2浓度的垂直分布在白天和夜间是不同的,在接近地面处CO2浓度始终最大。从季节CO2廓线看出,在植物生长季节林冠处CO2浓度有明显的成层现象,不同高度(60~2.5m)的CO2浓度3月份变化较小差值为10mmol穖ol-1,而在7月份变化较大,差值为60mmol穖ol-1。7月份林冠处(22,26,32m)CO2浓度梯度较大,浓度差为8mmol穖ol-1。计算位于涡度相关仪器之下的40米高空气柱中CO2贮存状况表明,年际贮存是负值,但对NEE的贡献很小。图4参11。

简介：根据东白城子河段近十几年试验监测资料,采用几种化学计量关系,分析论证了该河段的侵蚀CO2和游离CO2的含量周期性变化规律,为合理利用这一规律提供科学依据,并为该河段的水质监测评价工作节省了人力、物力、财力。

简介：Low-CoLa1.8Ti0.2MgNi8.9Co0.1alloyswerepreparedbymagneticlevitationmeltingfollowedbyannealingtreatment.TheeffectofannealingonthehydrogenstoragepropertiesofthealloyswasinvestigatedsystematicallybyX-raydiffraction（XRD）,pressure-compositionisotherm（PCI）,andelectrochemicalmeasurements.TheresultsshowthatallsamplescontainLaNi5andLaMg2Ni9phases.LaCo5phaseappearsat1,000℃.Theenthalpychangeofallhydridesiscloseto-30.6kJ·mol-1H2ofLaNi5compound.Annealingnotonlyincreaseshydrogencapacityandimprovescyclingstabilitybutalsodecreasesplateaupressureat800and900℃.Afterannealing,thecontractionofcellvolumeandtheincreaseofhydridestabilitycausethehighratedischargeabilitytoreduceslightly.Theoptimumalloyisfoundtobeoneannealedat900℃,withitshydrogencapacityreachingupto1.53wt%,anddischargecapacityremaining225.1mAh·g-1after140charge–dischargecycles.

简介：Aim:Toinvestigatetheeffectofhome-basedcardiacrehabilitationonfunctionalcapacity,healthbehavior,andriskfactorsinpatientswithacutecoronarysyndromeinChina.Methods:Eightypatientswithacutecoronarysyndromewereenrolledinthisprospectiverandomizedcontrolledstudy.Patientsinthecardiacrehabilitationgroup(n=52)receivedhome-basedcardiacrehabilitationwithaheartmanualandahomeexercisevideofor3monthsandpatientsinthecontrolgroup(n=28)receivedonlyroutinesecondaryprevention.The6-minwalkdistance,laboratorytestresults,healthybehavior(questionnaire),qualityoflife(12-itemShortFormHealthSurvey),anxiety(7-itemGeneralizedAnxietyDisorderQuestionnaire),anddepression(9-itemPatientHealthQuestionnaire)wereevaluatedatthebeginningandaftertreatmentfor3months.Results:Comparedwithbaselinedata,52patientswhoparticipatedincardiacrehabilitationhadlonger6-minwalkdistance(515.26±113.74mvs0.445.30±97.92m,P<0.0002),higherproportionsof“alwaysexercise”(78.26%vs.28%,P<0.05),“alwayslimitfoodwithsugar”(65.22%vs12%,P<0.05),“alwayseatfruits200–400geveryday”(82.61%vs.4%,P<0.05).and“alwayseatvegetables300–500geveryday”(21.74%vs.12%,P<0.06)aftertreatmentfor3months.Thelow-densitylipoproteincholesterolcontrolrate(52.17%vs.28%,P<0.05)andthesystolicbloodpressurecontrolrate(100%vs.68%,P<0.05)werealsosignificantlyincreasedaftertreatmentfor3monthsinthecardiacrehabilitationgroup.Nosignificantincreasewasfoundinthecontrolgroupaftertreatmentfor3months.Nocardiac-eventrelatedtohomeexercisewasreportedinbothgroups.Conclusion:Home-basedcardiacrehabilitationisafeasibleandavailablecardiacrehabilitationmodeinChina.

简介：BACKGROUND:Changesinthecardiacautonomicnerveareconsideredtobeimportantfactorsinthemechanismsofheartfailure.Itispossibletoreduceorslowdownnervedegenerationandnecrosis,providedthatpatientstakeeffectiveneuroprotectantsduringtheearlystagesofheartfailure.Moreover,itispossibletorelievethepathologicalprocessandreducetheriskofdeath.OBJECTIVE:Tostudytheeffectofgrowthhormonereleasingpeptide(GHRP)oncardiaccholinergicnervefiberdensitydistributioninaratmodelofheartfailure,andverifywhetherGHRPcanamelioratedenervation.DESIGN,TIMEANDSETTING:ArandomizedcontrolledstudywasperformedattheKeyLaboratoryofAnatomy,HarbinMedicalUniversity,betweenJuneandOctober2009.MATERIALS:Fiftyadult,healthy,female,Wistarrats,weighing(200±20)g,wererandomlydividedintoGHRP(n=30),model(n=10),andshamoperation(n=10)groups.GHRP-2wasmadeinShanghai,China(batchNo.z071212-03).METHODS:AcutemyocardialinfarctionwasestablishedbyligatingtheleftanteriordescendingcoronaryarteryintheGHRPandmodelgroups.Fiveweekslater,myocardialfunctionwasdetectedusingcolorultrasoundelectrocardiograph.Ejectionfraction<60%wasconsideredtobeasuccessfulmarkerofchronicheartfailuremodels.However,theleftanteriordescendingcoronaryarterywasnotligatedintheshamoperationgroup.TheGHRPgroupwasinjectedwith100μg/kgGHRP-2,andtheothertwogroupswereinjectedwiththesamevolumeofphysiologicalsaline,onceperday.MAINOUTCOMEMEASURES:After4weeks,pathologicalchangesincardiaccholinergicnervefibersweredetectedunderopticmicroscopyfollowinghematoxylin/eosinstaining.Inaddition,densitydistributionwasmeasuredusingamulti-functioncolorpathologicalimagesystem.RESULTS:Intheshamoperationgroup,myocardialcellswereregular,uniformlystained,andnoinflammatorycellswerepresent.Inthemodelgroup,myocardialcellswereunevenlystained,exhibitednuclearatrophy,degeneration,dissolution,ordisap

简介：目的：探讨针刺内关与郄门穴对冠心病患者每博心输出量及左心室排血的峰值流速的影响。方法：60例冠心痛患者分为内关组和郄门组，分别在运针3min后和留针20min后测试每博心输出量，左心室排血的峰值流速。再与针刺前得测试结果相比较。结果：46例患者针刺3min后Q值和VP值较针刺前上升。留针20min后，34例患者Q值和VP值全部上升。结论：针刺内关和郄门可增强左心室壁的收缩能力，使心脏的每博输出量增加，改善冠心病患者的心肌缺血状态。

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简介：Akindofdrivecircuitwhichislowpowerconsumption,high-performanceandhigh-poweroutputforsteppingmotor,basedonBY-5064,andakindofdedicatedcircuitfortwo-phasehybridsteppingmotoraredesigned,drivecontrolforsteppingmotorwithhigh-powerisachieved.

简介：我们导出通过和事件激光领域，射出的光子，和磁性的wiggler在在第一免费电子的激光(FEL)作为使不安的唯一的zeroth顺序扮演古典地的磁性的wiggler生产的一个轴的静电的领域的一个电子的三量的相互作用散布的生气的节。在推导，我们使用量摆动electrodynamics(QWD)。我们发现这散布支配平常的二量的散布。由三量的散布稀释的上述静电的领域驾驶的自发的免费电子的二量的空排放的输出力量在第一FEL的情况中与测量力量在10的一个因素以内同意。

简介：DELAY_Nisakindofimportantfunctioninsystemdynamic.Studiesaboutthebasicrelationaltypebetweenitsinputandoutputunderthediscretestatehavethesignificantinfluenceandinstructionindeterminationsystemdynamicsmodelparameter,indebuggingmodel,andinanalyzingresult.ThearticlehasobtainedtheDELAY_Ninputoutputrelationalexpressions,hasobtainedtheinputaveragedelaytimeandthedelayvarianceexpression,inthisfoundution,proposedonemethodofdeterminationdelayfunctiontype.

简介：介绍了化肥厂利用排空的二氧化碳气体作为固定层煤气炉的气化剂，他能够有效提高半水煤气中一氧化碳的含量，为企业创造效益。