简介:Gymnarchusniloticusswimsbyundulationsofalong-baseddorsalfin,whileitsbodyaxisisinmanycasesheldstraightduringswimming.ThispaperprovidesabriefrelevantintroductiontoGymnarchusniloticus,whichbelongstotheAfricanfreshwaterelectriceelsbutcaninspireourbionicinterestsinpropulsionbesidesitsabilitiesinelectricsensing.AspeciallarvaofGymnarchusniloticuswasmorphologicallymeasuredbyphotographingitwithapieceofscale-calibratedpaperasthebackground.ThenweanalyzedthedatabyaCFD-aidedapproach.DetailedflowpatternsaroundthelarvaandaNACA0012hydrofoilwererespectivelycalculatedandvisualizedattheReynoldsnumberof7350orso.TheresultsshowthattheprofileofGymnarchusniloticusiswellstreamlined.
简介:Itiswidelyacceptedthatthedesignofmorphologicalfilters,whichareoptimalinsomesense,isadifficulttask.Inthispaperanovelmethodforoptimallearningofmorphologicalfilteringparameters(Genetictrainingalgorithmformorphologicalfilters,GTAMF)ispresented.GTAMFadoptsnewcrossoverandmutationoperatorscalledthecurvedcylindercrossoverandmaster-slavemutationtoachieveoptimalfilteringparametersinaglobalsearching.Experimentalresultsshowthatthismethodispractical,easytoextend,andmarkedlyimprovestheperformancesofmorphologicalfilters.Theoperationofamorphologicalfiltercanbedividedintotwobasicproblemsincludingmorphologicaloperationandstructuringelement(SE)selection.Therulesformorphologicaloperationsarepredefinedsothatthefilter'spropertiesdependmerelyontheselectionofSE.Bymeansofadaptiveoptimizationtraining,structuringelementspossesstheshapeandstructuralcharacteristicsofimagetargets,andgivespecificinformationtoSE.Morphologicalfiltersformedinthiswaybecomecertainlyintelligentandcanprovidegoodfilteringresultsandrobustadaptabilitytoimagetargetswithclutterbackground.
简介:Thispaperintroducesanoveltechniqueforobjectdetectionusinggeneticalgorithmsandmorphologicalprocessing.Themethodemploysakindofobjectorientedstructureelement,whichisderivedbygeneticalgorithms.Thepopulationofmorphologicalfiltersisiterativelyevaluatedaccordingtoastatisticalperformanceindexcorrespondingtoobjectextractionability,andevolvesintoanoptimalstructuringelementusingtheevolutionprinciplesofgeneticsearch.Experimentalresultsofroadextractionfromhighresolutionsatelliteimagesarepresentedtoillustratethemeritandfeasibilityoftheproposedmethod.
简介:Toinvestigatethemorphologicalchangesofspermatozoaintheproximalvasdeferensaftervasectomy.Methods:Proxinalvasdeferensfluidswerecollectedfrom79fertilemen(groupA)and64vasectomizedmen(groupB)duringtheoperationsofvasectomyorvasovasostomy.SpermmorphologyintheproximalvasdeferenswasanalyzedafterstainingwiththemodifiedPapanicolaoumethod.Results:ThepercentageofspeImatozoawithanormalovalheadfromgroupB(50.7%±21.7%)wassignificantlylowerthanthatofgroupA(75.2%±11.1%).ThedataingroupAwassimilartothoseofnormalsemenandthereforerepresentsthephysiologicalconditionoftheproximalvasdeferensspermoffertilemen.TherewerenosignificantdifferencesinthepercentagesofnormalovalheadsingroupBwiththetimesincevasectomy.Condusion:Aftervasectomy,thespermatozoaintheproximalvasdefereusandepididymiswerecontinuouslydegeneratingandbeingreplenishedbyspenmatozoacomingfromtestis.Theobviousmorphologicaldegenerationoccurredinthespermtailandspermatozoawithasmalloralheadandamorphousheadswereincreased.(AsianJAndrof1999Jun;1:61-65)
简介:为Protoperidinium种类的分类和鉴定在它的分类学习期间是最困难的工作。在这研究,Protoperidinium的分类地位被跟踪它的分类历史澄清,23种类在中国的海岸上属于类Protoperidiniumpreliminarily被识别,并且词法描述和板模式为每种被给。类似的种类的关键差别也在这研究被讨论,我们相信那P。oceanicum和P。murry,P。tumidum和P。fatulipes,P。水珠和P。majus是分开的种类;P。diabolum应该被当作有效名字而不是报导名字Peridiniumglobosum或Peridiniumlongipes;在P之间的分类关系。punctulatum和P。subinerme要求进一步的学习。
简介:AIMToobservethetherapeuticeffectofmoxibustiononulcerativecolitisanditsinfluenceonthecolonicmucosalmorphology.METHODSForty-sixpatientswithulcerativecolitiswererandomlydividedintothemoxibustionwithherbalmedicineunderneathgroupandthewesternmedicinegroup.Thirtypatientsweretreatedwiththeabovemoxibustionand16patientswithSalicylayefapyridine(SASP).Thecolonicmucosaof13patientsinthemoxibustiongroupwasobservedbycolonoscopybeforeandafterthetreatment.MucinwasalsoanalyzedbyH.EandAB-PASstaining.RESULTSSeventeenpatientswereclinicallycured,12wereimprovedand1unchangedinthemoxibustiongroup.Inthecontrolgroup,5patientswereclinicallycured,7improvedand4unchanged.ThirteenpatientswithactiveUCweretakenasthesubjectsforhistopathologicanalysisinthisstudy.Thecolonicmucosallesionswereremarkablyimprovedandthecharacteristicofthemucinalsochanged.Inmostsections,thechronicinflammationofmucosawasgeatlyameliorated(P<0.01).Theinflammatorycellinfiltratationmuchdecreasedandneutrophils,disapearedinmostsections(P<0.001).Thegobletcellssignificantlyincreased(P<0.001);cryptparacryptabscessormucosalulcerationwasseen(P<0.001).CONCLUSIONTherateofcureofulcerativecolitisbymoxibustionwithherbalmedicinebeneathissuperiortothatbySASP.Thissortofmoxibustioncaneffectivelyimprovethecolonicmucosallesionsandrestoretheproportionofmucoproteintonearnormal.
简介:Tappingmodeatomicforcemicroscopehasbeenappliedtoobservesingle-chainPMMAparticleswhichwerestoredforsixmonthsatroomtemperatureaftersprayedfromverydilutesolutionsingoodsolvents,good/poormixedsolvents,andathetasolvent.Monodis-persePMMAstandardsofmolecularweightsrangingfrom7.90×10~4to1.3×10~6wereusedtoinvestigatetheeffectofmolecularweightohthesizeofthesingle-chainPMMAparticles.Thesesingle-chainparticlesshowedclosetosphericalshapes.Themorphologyofsingle-chainPMMAparticlesofagivenmolecularweightwasfoundtobeidenticalinspiteofdifferentsolventsusedforsolutionspraying.Molecularweighdependenceoftheparticledimensionwasalsofound.Thediametersofsingle-chainPMMAparticlesaftercorrectionoftlp-geometryeffectwerecomparedtothevaluesestimatedfrommolecularweightanddensity.
简介:Theeffectofvinylacetate(VA)contentinethylenevinylacetate(EVA)copolymeronthemechanicalpropertiesofpolypropylenewasinvestigated.ThreedifferentEVAcopolymerswithconcentrationsof3wt%,6wt%,9wt%,12wt%and15wt%,wereblendedtopolypropylene.Themechanicalpropertiessuchasyieldandtensilestrengths,elasticmodulus,Izodimpactstrength,hardnessandmeltflowindexoftheblendswereinvestigated.Relationshipbetweentypeofvinylacetateandconcentrations,mechanical,MFIandmorphologicalpropertieswereexplored.
简介:有建议激活的apoptosis在呼喊的人的精子发信号否定地影响他们的授精潜力的证据的基本身体。然而,发信号的这apoptotic是否是与精子发生有关的未成功的apoptosis的一件遗物,仍然是争论的或如果它应该在导致stereotypical的成熟精子被认为是一条功能的preformed小径词法变化思考原子拆卸。探讨这个问题,apoptosis在密度坡度centrifugation充实的成熟、不成熟的呼喊的人的精子用betulinic酸被导致。apoptosis的执行被经由传播电子显微镜学观察极端词法的变化监视。在体的房间的apoptosis的典型词法符号与apoptotic身体,损害mitochondrial正直,原子信封的缺点,和原子破碎的形成包括血浆膜blebbing;这些形态学也在人的精子被观察了。另外,这些apoptotic特征在与成熟精子相比的不成熟的精子是更经常的。后面的betulinic酸处理,apoptosis相关的词法变化从健康施主在成熟精子被导致。这效果更不在不成熟的精子被读。而且在两部分,betulinic酸处理增加了反应acrosome的精子的百分比。我们的极端词法的学习的结果在成熟呼喊的人的精子证明apoptosis的功能的胜任。一个唯一的未成功的过程的理论可能为不成熟的精子仅仅是有效的。由刺激apoptosis的acrosome反应的正式就职可能使精子apoptosis的生物关联清楚些。
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简介:Thispaperproposesalanedetectionalgorithmbasedonmulti-structureelementmodelofmorphological.Theinnovativepointofthealgorithmliesinthefactsthattheflexiblestructurehasthemulti-structureelementsthatlanemodelfeatureshave,andthatthealgorithmadoptsthemorphologicalfilteringprincipletoextractthepixelsintheimage,whichissimilartothelanemodel.Inthealgorithm,theinterestedareaisextractedbyamodeloftrapeziumfromoriginalimage,whichisdetectedbytheoperatorofCanny,andthelanesareextractedbythestructureelements,whichhavesimilarcharacteristicstothatoflanemodel.SeverallinesaredetectedbyHoughtransformation,thenthetrafficlanesarereconstructed.Experimentsshowthatthisalgorithmissimpleandrobust,andcanefficientlydetectthelanemaskaccuratelyandquickly.
简介:格林macroalgaeChaetomorphaaerea和C。linum分类地被糊涂。在这份报纸,我们试试词法、分子的分析分开这二种。C。aerea和C。linum能与词法characteritics被区分开来,例如复叶尺寸,房间尺寸和形状,他们的吝啬的长度/宽度比率(LWR),和房间围收缩。C的Thalli。aerea由顶往底地稀释与在上面的部分的直径270-500m,在中间的部分的160-360m,在基础部分的100-160m。为上面的部分,房间的长度是不到他们的直径。房间墙通常在隔膜压缩,它透明或无色并且给细丝beaded外观。相反,C的thalli。linum经常在一样的个人,以内有90-300m的一条经常的直径房间墙通常不压缩,房间是圆柱的或塑造的桶。LWR比C的大。aerea。结果证明在二种之间的pairwise距离为它的区域是为18SrRNA基因和53.5%-54.3%的3.6%-3.7%。在发展史,他们在远clades散布,它在分子的水平证实基因分叉。另外,词法数据显示C的那条细丝直径。linum样品是高度可变的,从90m到300m。然后这二种能被看作分开种类。
简介:ThemorphologicalchangeofSt/DVBcrosslinkedgelsduringchloromethylationwasstudiedbyfluorescencespectroscopyusingSt/DVBcrosslinkedandhypercrosslinkedgelsascontrolsamples.Ithasbeenfoundthatwithincreaseofchlorinecontent,theexcimeremissionband(~325nm)approachestovanish,whiletheintensityofmulti-ringaggregateemissionband(~420nm)quicklyreachesamaximum,andthendecreasessharplyaccompaniedbyappearanceofanewbroadbandcentredatca488nmwhichroughlycoincideswiththetypicalemissionbandofhypercrossllinkedSt/DVBgels.Mearwhile,theresultofIRmeasurementsuggeststhatmethylenebridgebetweenphenylringsformsandincreaseswithchloromethylationprocess.Theseresultsareexplainedintermsofasidereactionofpost-crosslinking,whichdensifiesthelooselycrosslinkednetworksandundoesthedenselyentangledmicrogelnuclei.Asaresult,themorphologyofthecrosslinkedgelsbecomesmorehomogeneouswithchloromethylation.