简介：Notfarfromtheedge[1]ofapleasantwoodthereoncelivedthreeBears.Theywerekind,goodBears,notrude,wildfellows[2]likethosethatlivenow;andtheyhadbuiltforthemselvesacomfortablelittlehouse.

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简介：InthispaperwegivesixexplicitformulaetocomputetheKirchhoffindex,themultiplicativedegree-Kirchhoffindexandtheadditivedegree-Kirchhoffindexofthek-cactuschainandthecactusgraphwhichcanbeobtainedfromak-cactuschainbyexpandingeachofthecut-verticestoacutedge.

简介：人生最重要的不是你从哪里来,而是你要到哪里去.不论过去怎么不幸,如何平庸,都不重要,重要的是你的未来必须充满希望.只要你对未来保持希望,你就会充满无穷的力量和进取的热情.

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简介：重点词汇1.checkv.&n.检查;审查Checkyourhomeworkbeforehandingitin.交作业以前先检查一遍。Ithinkthereisanagelimit,butI’dhavetocheck.我觉得是有年龄限制的,但我得去核实一下。I’lljusthaveaquickchecktoseeiftheletterhasarrivedyet.我要快速查看一下,看看那封信是否已经寄到。短语checkout察看;观察Checkoutthepricesatournewstore.看一看我们新商店的价格吧.2.clearv.清理;清除It’syourturntoclearthetable.该轮到你收拾餐桌了。短语clearout清理;丢掉Weclearedoutallouroldclothes.我们扔掉了所有的旧衣服。

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简介：Thisstudywasconductedtoevaluatethecriticalthermalmaximum(CTMax),theroutinemetabolismrate(MO2)andthelimitingoxygensaturation(LOS)ofthreesalmonidswithfourdifferentbodyweightsrangingfrom16gto131g.TheCTMaxwasestimatedatthreedifferentheatingratesincluding0.5℃min^-1,1℃h^-1and2℃d^-1.ResultsshowedthattheCTMaxofmapletrout(Oncorhynchusmykiss)wasthehighest,whichwasfollowedbysteelheadtrout(O.mykiss)andAtlanticsalmon(Salmonsalar).TheCTMaxofthesalmonidfishdecreasedwiththeincrementofbodyweight,andwassignificantlyinfluencedbytheheatingrate.TheMO2ofthesalmonidfishincreasedwiththeincrementoftemperature,anddecreasedwiththeincrementofbodyweight.Suffocationpointsofthefishdecreasedwithincreasingbodyweightandtemperature.SteelheadtroutwasmoretoleranttohypoxiathanmapletroutandAtlanticsalmon,whiletheMO2ofAtlanticsalmonwasthehighestamongthesethreesalmonids.TheLOSofthefishgenerallyhadapositivetrendwithtemperatureandbodyweight,andtheLOSofsteelheadtroutwassignificantlylowerthanthatofmapletroutandAtlanticsalmon.Inconclusion,mapletroutwasthemosttolerantkindtohightemperature,whilesteelheadtroutwasthemosttoleranttohypoxiaamongthreekindsofsalmonids.Moreover,theabilitiestotoleratehighertemperatureofthreesalmonidswereaffectedbytheirbodyweightandtheheatingrate,whiletheabilitiestotoleratehypoxiawereinfluencedbytheirbodyweightandthewatertemperature.

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简介：TheNanshaIslands,China,haveextremelyhighmarinebiodiversityandhundredsofmolluskshavebeenreportedthere.BenthosresourcesinvestigationsoftheintertidalandsubtidalzonearoundtheNanshaIslandshavebeencontinuouslyperformedfordecades,andrecently,dozensofnewspeciesandnewrecordsofmolluskshavebeenreportedfromthisarea.ThispaperdealtwiththreenewrecordspeciesoftheGastropodafromChinesewaters:CerithiumsalebrosumSowerbyII,1855,Vexillummilitare(Reeve,1845)andVexillumbizonale(DautzenbergetBouge,1923),respectivelybelongingtothreefamilies:CerithiidaeFleming,1822,andCostellariidaeMacDonald,1860.AllspecimenswerecollectedfromtheNanshaIslandsduringthebenthosresourcesinvestigationsontheintertidalzoneofislandsandreefsintheSouthChinaSeainrecentyears.Diagnosisandgeographicdescriptionsofbothgenusandspecies,illustrationsofeachspeciesweregiveninthiscontribution,anddiscussionoftaxonomy,identificationfeaturesandfaunalcharacteristicswerepresented.AllexaminedspecimensweredepositedintheMarineBiodiversityCollectionsofSouthChinaSea,ChineseAcademyofSciences.

简介：Inthiswork,dynamiccompositeanalysistruncatedsandwichconicalshells(STCS)withdifferentboundaryconditionsunderlowvelocityimpactwasinvestigatedanalytically,accordinghigherordersandwichpaneltheory.ImpactoccurredatthetopfacesheetandthecontactforcehistoryispredictedusingtwosolutionmodelscalculatedapplyingprincipalofHamiltonbyconsideringthedisplacementcontinuityconditionsbetweenthelayers.Forobtainingthedisplacementandcontactforcehistories,thedifferentialquadraturemethod(DQM)isutilised.Inthisinvestigation,theeffectsoflayerlaminanumber,conesemivertexangle,boundaryconditionsandimpactvelocityontheimpactresponsearestudied.

简介：现在的学习被设计决定Pinelliapedatisecta的茎tuber的化学成分。化学成分被各种各样的色析法的技术，和他们的结构孤立并且净化根据物理化学的性质被阐明并且光谱数据。三新碱(加重1，2，和3)作为9-被获得并且识别((5-methoxypyridin-2-yl)甲基)-9H-purin-6-amine(1)，4-(2-(2，5-dioxopyrrolidin-1-yl)乙醇)苯基醋酸盐(2)，并且N-(9-((5-methoxypyridin-2-yl)甲基)-9H-purin-6-yl)acetamide(3)。这些混合物与人的颈的癌症HeLa房间为他们的cytotoxicity被作比较。混合物1和3显著地与是的IC50价值禁止了HeLa房间的增长3.02???????┱??????????????愠摮潲牧灡潨楬敤？？

简介：Inthiswork,dynamiccompositeanalysistruncatedsandwichconicalshells(STCS)withdifferentboundaryconditionsunderlowvelocityimpactwasinvestigatedanalytically,accordinghigherordersandwichpaneltheory.ImpactoccurredatthetopfacesheetandthecontactforcehistoryispredictedusingtwosolutionmodelscalculatedapplyingprincipalofHamiltonbyconsideringthedisplacementcontinuityconditionsbetweenthelayers.Forobtainingthedisplacementandcontactforcehistories,thedifferentialquadraturemethod(DQM)isutilised.Inthisinvestigation,theeffectsoflayerlaminanumber,conesemivertexangle,boundaryconditionsandimpactvelocityontheimpactresponsearestudied.

简介：Focusingonobstacleavoidanceinthree-dimensionalspaceforunmannedaerialvehicle(UAV),thedirectobstacleavoidancemethodindynamicspacebasedonthree-dimensionalvelocityobstaclesphericalcapisproposed,whichquantifiestheinfluenceofthreateningobstaclesthroughvelocityobstaclesphericalcapparameters.Inaddition,theobstacleavoidanceschemesofanypointonthecriticalcurveduringthemulti-obstaclesavoidancearegiven.Throughprediction,theinsertionpointfortheobstacleavoidancecanbeobtainedandtheflightpathcanbereplanned.TakingthePythagoreanHodograph(PH)curvetrajectoryre-planningasanexample,thethree-dimensionaldirectobstacleavoidancemethodindynamicspaceistested.Simulationresultsshowthattheproposedmethodcanrealizetheonlineobstacleavoidancetrajectoryre-planning,whichincreasestheflexibilityofobstacleavoidancegreatly.

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简介：1.ObjectivesAsabout99%ofthenaturalgashydrate(NGH)resourcesarestoredontheseafloor,itisinevitablethatinitsprocessofexplorationandproduction,therewillbegeohazardssuchasmethaneleakage,seabedsubsidence,ecosystemdamageandevenlandslide.Therefore,asetofintegratedsystemsforenvironmentalmonitoringintheprocessofNGHproductionhasbeenproposedintheconsiderationofenvironmentaldisastersthatmayariseintheprocessofhydrateproduction.

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简介：1.ObjectiveDunhuangBasinisthelargestareaandthethirdhydrocarbonresourcespotentialbasinamongthebasinsofHexiCorridor,andalsoalowexplorationdegreebasin.Thesourcerockposition,characteristicsandhydrocarbongeneratingpotentialofresidualMid-LowerJurassicarestillunknown.TheprojectistoascertainthesourcerockdevelopmentandhydrocarbongeneratingcapacityofMid-LowerJurassic,tofindouttheresourcepotential,todelineatetheresourceprospectareaandtooptimizethefavorableareas.ItmaydirectthepetroleumexplorationinDunhuangBasin.