简介：1SignificanceofAllSolidStateLaser(DPL)TechnologyinFieldofLaserBecauseoftheadvantagesofhighconversionefficiency,goodbeamquality,smallsizeandlightweight,DPLbecomesthehotspotandpriorityofdevelopmentoflasertechnology.Itmaybethemainbodyoflaserinthefutureandreplacegaslaserandliquidlaser.Itisagreatrevolutionoflasertechnology.ThedevelopedcountriesvieindevelopingDPL.Chinahasachievedgreatsuccessinthisfield,butthereisawidegapbetweenthedevelopedcountriesandus.Weshouldattachgreatimportancetoit.

简介：TheseasonalvariabilityofcloudopticaldepthovernorthwesternChinaderivedfromCloudsandtheEarth'sRadiantEnergySystem(CERES)SingleScannerFootprint(SSF)AquaModerateResolutionImagingSpectroradiometer(MODIS)Edition1BdatafromJuly2002toJune2004ispresented.TheregionsofinterestarethosewithAsiamonsooninfluence,theTianshanandQilianMountains,andtheTaklimakanDesert.TheresultsshowthattheinstantaneousmeasurementspresentedherearemuchhigherthanthepreviousresultsderivedfromInternationalSatelliteCloudClimatologyProject(ISCCP)D2monthlymeandata.Generallythemeasurementsofcloudopticaldeptharethehighestinsummerandthelowestinwinter,however,TaklimakanDeserthasthelowestmeasurementsinautumn.TheregionalvariationisquitesignificantovernorthwesternChina.