简介：

简介：Aimingattheproblemthatthereisn'tanystandardizedcalibrationmethodfortheperformanceindexofsurfaceplasmonresonance(SPR)sensor,thecalibrationmethodforkeyperformanceindicesofSPRsensorissummarizedandproposedbasedonthecomparisonofrelativemethodsanddefinitionofeachindex.Experimentaldataofsucrosesolutionswithvariousconcentrationsareobtainedbytheself-buildingSPRinstrument,andthenthecalibrationmethodisusedtodeterminetheperformanceindices,suchasnoise,drift,sensitivity,resolution,linearity,dynamicrangeandreproducibility.Experimentalresultsshowthatthedefinitionofindicesisreasonable,andthecalibrationmethodiscorrect,whichhasgreatsignificanceforperformanceevaluationofSPRsensor.

简介：

简介：

简介：Losslessdatahidingcanrestoretheoriginalstatusofcovermediaafterembeddedsecretdataareextracted.In2010,Wangetal.proposedalosslessdatahidingschemewhichhidessecretdatainvectorquantization(VQ)indices,buttheencodingstrategiesadoptedbytheirschemeexpandthefinalcodestream.ThispaperdesignsfourembeddingandencodingstrategiestoimproveWangetal.'sscheme.TheexperimentresultoftheproposedschemecomparedwiththatoftheWangetal.'sschemereducesthebitratesofthefinalcodestreamby4.6%andraisesthepayloadby1.09%onaverage.

简介：

简介：Assessmentofsoilqualityisimportantforoptimumproductionandnaturalresourcesconservation.AgriculturalandpasturesoilqualitiesofDeh-SorkhregionlocatedatsouthofMashhad,northeasternIranwereassessedusingtheintegratedqualityindex(IQI)andNemeroqualityindex(NQI)modelsincombinationwithtwodatasets,i.e.,totaldataset(TDS)andminimumdataset(MDS).Inthisstudy6soilpropertiesconsideredasMDSwereselectedoutof18propertiesasTDSusingprinciplecomponentanalysis.Soilsamplesweredividedinto3groupsbasedonoptimumrangesof8soilphysicalqualityindicators.Soilsampleswiththemostindicatorsatoptimumrangewereselectedasgroup1andthesampleshavingfewerindicatorsatoptimumrangewerelocatedingroups2and3.Optimumrangesofsoilporesizedistributionfunctionswerealsodeterminedassoilphysicalqualityindicesbasedon8soilphysicalqualityindicators.Poresizedistributioncurvesofgroup1wereconsideredastheoptimumporesizefunctions.Theresultsshowedthatrelativelyhighorganiccarboncontentscouldimproveporesizedistribution.Meancomparisonsofsoilphysicalqualityindicatorsdemonstratedthatmeanweightdiameterofwetaggregates,structuralstabilityindex,theslopeofmoistureretentioncurveatinflectionpoint,andplantavailablewatercontentinagriculturallandusedecreasedsignificantlyinrelationtopasturelanduse.Inaddition,theresultsdemonstratedthatthestudiedMDScouldbeasuitablerepresentativeofTDS.78%ofpasturesoilshadtheoptimumporesizedistributionfunctions,whilethisparameterforagriculturalsoilswasonly13%.Ingeneral,thesoilsofthestudiedregionshowedhighlimitationsforplantgrowthaccordingtothestudiedindicators.

简介：

简介：Integratedmulti-trophicaquaculture(IMTA)hasbeenproposedasaconceptthatcombinesthecultivationoffedaquaculturespecies(e.g.,finfish/shrimp)withextractiveaquaculturespecies(e.g.,shellfish/seaweed).Inseaweed-basedintegratedaquaculture,seaweedshavethecapacitytoreducetheenvironmentalimpactofnitrogen-richeffluentsoncoastalecosystems.Thus,selectionofoptimalspeciesforsuchaquacultureisofgreatimportance.Thepresentstudyaimedtodevelopaseaweedspecies-selectionindexforselectingsuitablespeciesinseaweed-basedintegratedaquaculturesystem.Theindexwassynthesizedusingavailableliterature-basedinformation,referencedata,andphysiologicalseaweedexperimentstoidentifyandprioritizethedesiredspecies.Undariapinnatifida,PorphyrayezoensisandUlvacompressascoredthehighestaccordingtoaseaweed-basedintegratedaquaculturesuitabilityindex(SASI).Seaweedspecieswiththehighestscoreswereadjudgedtofittheintegratedaquaculturesystems.Despitetheapplicationofthismodellimitedbylocalaquacultureenvironment,itisconsideredtobeausefultoolforselectingseaweedspeciesinIMTA.

简介：Aplasmonicrefractiveindexsensorbasedonmetal-insulator-metal(MIM)waveguide-coupledstructureisproposedanddemonstratedinthispaper.Thephysicalmechanismofthedeviceisdeduced,andthefinitedifferencetimedomain(FDTD)methodisemployedtosimulateandstudyitsindexsensingcharacteristics.Bothanalyticandsimulatedresultsshowthattheresonantwavelengthofthesensorhasalinearrelationshipwiththerefractiveindexofmaterialundersensing.Basedontherelationship,therefractiveindexofthematerialcanbeobtainedfromthedetectionoftheresonantwavelength.Theresultsshowthatthesensitivityofthesensorcanexceed1600nm/RIU,anditcanbeusedinchemicalandbiologicaldetections.

简介：

简介：Objective:Tovalidatemalnutritionscreeningtoolofnutritionriskindex(NRI)againstpatient-generatedsubjectiveglobalassessment(PG-SGA)asagoldstandardtoolincolorectalcancerpatientsbeforeradiotherapy.Methods:Nutritionalstatusof52volunteercolorectalcancerpatientswithameanageof54.1±16.8yearswhoreferredtoradiotherapycenterwereassessedbyPG-SGA(goldstandardmethod)andNRI.Serumalbuminlevelsofpatientsweredeterminedbycolorimetricmethod.Acontingencytablewasusedtodeterminethesensitivity,specificity,andpredictivevalueoftheNRIinscreeningpatientsatriskofmalnutrition,incomparisonwiththePG-SGAinpatientsbeforeradiotherapy.Results:ThefindingsofPG-SGAandNRIshowedthat52%and45%ofpatientsinourstudyweremoderatelyorseverelymalnourishedrespectively.TheNRIhadasensitivityof66%andaspecificityof60%againstPG-SGA.Thepositivepredictivevaluewas64%andthenegativepredicativevaluewas62%.TheagreementbetweenNRIandPG-SGAwasstatisticallyinsignificant(kappa=0.267;P>0.05).Conclusions:Thefindingsofpresentstudyshowedthattheprevalenceofmalnutritionwashighinpatientswithcolorectalcancer.Moreover,NRImethodhadlowsensitivityandspecificityinassessingnutritionalstatusofpatientswithcancer.Itseemsthatthecombinationofanthropometric,laboratoryparametersandasubjectivescoringsystemmaybehelpfultoolsinscreeningofmalnutritionincancerpatients.