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简介：Studiesonterahertz(THz)radiationandfunctionadeviceshavedrawnincreasingattentionduetotheirapplicationsinbiologicalimagingandsensingnondestructiveevaluation,nationalsecurity,spectroscopyandhighspeedcommunication.TunableTHzsourcesbasedondifferencefrequencyorparametricoscillationgenerationarehighlyefficientandreliablefortheseapplications

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简介：Theterahertzwaveisconsideredtohavegreatvaluesandplentifulapplications,suchasinmaterialscience,analysisofmolecularspectra,informationandcommunicationtechnology,biologyandmedicalscience,nondestructiveevaluation,andnationalsecurity.High-powerwidelytunableterahertzsourcesarerequiredintheabovepracticalapplicationsofterahertztechnologies.Apromisingapproachformonochromaticterahertzgenerationisbasedonsecond-ordernonlinearopticaleffect,

简介：Inthepastfewyears,energy-efficienttechnologiesgetmoreandmorescientificandtechnologicalinterestastheenergybottleneckstopsthe'Moore’slaw'accordingtothereportsofInternationalRoadmapforSemiconductors(ITRS).Moreover,peoplestarttotakecareseriouslyofthe

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简介：Geometricparametersoftheturbinebladeareclassifiedaccordingtotheirdestinedfunctions,andthemathematicaldefinitionofthoseparametersinthesectioncurveisintroducedindetail.Somepartsofthesectioncurveshapecanbeadjustedfreely,offeringmoreflexibilitytodesigners.

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