简介:Toinvestigatetheinhibitingeffectsoftheanti-angiogenicfactorandostatinandtheanti-angiogenicdrugendostatinontumourangiogenesisandtumourcells,acoupledmathematicalmodeloftumorangiogenesiswithtumourgrowthandbloodperfusionisdeveloped.Simulationresultsshowthatangiostatinandendostatincanimprovetheabnormalmicroenvironmentinsidethetumourtissuebyeffectivelyinhibitingtheprocessoftumorangiogenesisanddecreasingtumourcells.Thepresentmodelcanbeusedasavalidtheoreticalmethodintheinvestigationofthetumouranti-angiogenictherapy.
简介:ByusingthegeneralizedPoincaréindextheoremitisprovedthatifthen^2criticalpointsofann-polynomialsystemformaconfigurationoftype(2n-1)-(2n-3)+(2n-5)-…+(-1)^n-1,andthe2n-1outmostanti-saddlesformtheverticesofaconvex(2n-1)-polygon,thenamongthese2n-1anti-saddlesatleastonemustbeanode.
简介:Asynergyofcomputersimulations,analyticalformulations,andexperimentsprovesveryeffectiveinresearchanddevelopment.Usingnanorodgrowthasanexample,thisletterpresentsthesynergyofthethreecomplementaryapproachesinresearch,anddemonstratesitseffectiveness.Throughthissynergy,atheoreticalframeworkofnanorodgrowthemerges;throughthedirectionofthetheories,experimentalrealizationofsmallestwell-separatednanorodsbecomesreality;throughtherealizationofsuchnanorods,metallicglueinambientenvironmentsbecomestechnicalrealityandcommercialpossibility.
简介:LetP(z)beapolynomialofdegreenhavingnozerosin|z|<1,thenforeveryrealorcomplexnumberβwith|β|≤1,and|z|=1,R≥1,itisprovedbyDewanetal.[4]that︱P(Rz)+β(R+1/2)nP(z)︱≤1/2{(︱Rn+β(R+1/2)n︱+︱1+β(R+1/2)n︱)max|z|=1|P(z)︱-(︱Rn+β(R+1/2)n︱-︱1+β(R+1/2)n︱)min|z|=1|P(z)︱}.Inthispaperwegeneralizetheaboveinequalityforpolynomialshavingnozerosin|z|
简介:硼是不平常的物理特征从电子缺乏的、高度去除的共有原子价契约导出的周期表和展览上的碳的邻居。作为碳的最近的邻居,硼以类似于碳的许多方法,例如有采用sp2杂交的短共有原子价半径和灵活性。因此,硼能能够形成单层graphene的结构的类似物。尽管许多理论报纸报导了发现硼的二维的同素异形体,为如此的原子薄的硼nanostructures没有试验性的证据直到2016。最近,单个层的硼的成功的合成(叫作borophene)在Ag(111)上,底层打开硼nanostructures的时代。在这简短评论,我们将讨论以合成技术,描述和原子模型在borophene上被做了的进步。然而,borophene只在幼年期;更多的努力被期望在优秀样品的控制合成上在未来被作并且定制它的物理性质。
简介:Inthispaperamodeloftransvcrsalfilterispresentedtostudytheadaptivematchofthetimevariantchannel.Theleastmeansquareerrorfil-teringmethodisusedtoobtaintheweightingcoeffcientsofthefilter.Withthepurposeofspeedinguptheconvergenceoftheiterationequationofadaptivefiltering,anadaptivefactoroftheiterationstepsizeμ_aisderivedinthispaper.Theresultofcomputersimulationshowsthatinthecaseofusingadaptiveμ_a,theconvergencespeedoftheiterationequationisincreased2timesapproximatelyincomparisonwithconstantμ_f.Thestudysuggeststhattheadaptivefilterwithadaptiveμ_a.havetheperformancetofollowthechangeoftime-variantcharacteristicsofthechannel.
简介:Inthispaper,algorithmsforfindingtheinverseofafactorblockcirculantmatrix,afactorblockretrocirculantmatrixandpartitionedmatrixwithfactorblockcirculantblocksoverthecomplexfieldarepresentedrespectively.Inaddition,twoalgorithmsfortheinverseofafactorblockcirculantmatrixoverthequaterniondivisionalgebraareproposed.
简介:Rheumatoidfactors(RFs)arethecharacteristicautoantibodiesofrheumatoidarthritis.Recentresearchesinourlaboratoryshowedthattheimmobilizedsingle-strandedDNA(ss-DNA)immunoadsorbentcanselectivelyremoveRFsfromtheserumofpatients.Inthepresentpaperarestudiedthemodificationofargininine,tryptophan,lysineresiduesandcarboxylterminusofIgGRF,whichwasseparatedfrompatients′serum,with1,2-cyclohexanedione(CHD),N-bromosuccinimide(NBS),pyridoxal5′-phosphate(PP)and1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide(EDC)respectively,andtheireffectsontheadsorptioncapacityoftheimmobilizedss-DNAimmunoadsorbentforIgGRF.Afterthespecificmodification,thecorrespondingadsorptioncapacitiesoftheadsorbentswerechangedfrom48%,46%,44%and54%to84%,14%,21%and81%,respectively.Theseresultsindicatethattheelectrostaticorionic-bondingisessentialfortheinteractionbetweenss-DNAandIgGRF.
简介:Thereexiststrongmultipatheffectsinashallowwateracousticchannel.Thepaperdiscussessomeoftheseimportanteffects.Thestati-sticalcharacteristicsofmultipathinshallowwaterarefirstdescribed,thentheanti-multipathabilityofDTCAschemeisanalysed.TheoreticalestimationsandfieldexperimentshaveprovedthatbothDTACAandDTCCAhaveahighabilityofanti-multipathandevenmakeuseofthemultipathenergy.