简介：在两倍旋涡(SODV)和台风的形成的组织工会之间的关系与大气的Research/Penn州的Mesoscale模型(MM5)的第五产生的国家中心基于六个数字实验被讨论，进一步的讨论与结果显示出的真实台风case.The被做有批评距离dc为在baroclinicatmosphere.When的SODV，在分开的旋涡之间的距离比小或等于dc，进自我组织的双旋涡

简介：以便获得排水量通风的流动特征的更好的理解，三维的数字模型用CFD技术被开发。数字模拟结果被实验验证，基于这，与单个、双的热来源一起的三维的排水量通风系统的速度和温度分发被学习。热的不到二个不同案例采购的速度和温度领域被分析并且比较。在垂直温度有三层的数字结果表演与单个或双的热来源，和单个热来源的垂直温度分发一起排水量通风系统回答与两倍热来源的不同。当室内的负担大时，室内的罐头鈥檛仅仅对排水量通风系统满意的人的舒适要求，这样一个另外的制冷系统是必要的。在二热来源的条件下面，而且，排水量通风参数罐头鈥檛根据单个热来源入口参数简单地被计算，因此，在热来源之间的相互作用应该被考虑。

简介：一个指导模式生物传感器的提高的敏感被采用多孔的硅栅栏组织的双layered分析。联合栅栏的波导结构与不同折射索引由二多孔的硅栅栏层组成。模拟被改变折射索引执行，它由于在多孔的硅毛孔罐头增加以后的生物分子的绑定多孔的硅的折射索引。数字结果证明有一个双layered栅栏的这个新奇指导模式生物传感器能提供不仅很高的敏感而且一个更好的反射率特征。

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简介：一个太阳的池溏，典型双diffusive系统，是能收集并且存储太阳能的稳定的热来源。当热稳定的条件没在接口满足时，上面、更低的对流地区(UCZ和LCZ)将侵蚀中间的非对流的地区(NCZ)，导致落下或甚至太阳的池溏的热性能的倒塌。风强烈从UCZ的乘火车影响NCZ的侵蚀。热和盐的双散开从降低对流的地区(LCZ)的乘火车在NCZ的侵蚀起一个重要作用。池溏里的盐的水的混浊不仅能降低太阳的池溏的热表演，但是在乘火车机制上有效果。在这份报纸，基于与风驱动的狂暴的乘火车模型一起的双diffusive模型，太阳的池溏和乘火车机制的热表演上的混浊和外部风等等的效果与数字模拟被分析。关键词太阳的池溏-弯屈-双散开-混浊-侵蚀CLC数字TK51

简介：Amodelofdoublemediumaquiferisbrieflyintroducedinthispaper,apartialdifferentialequationaboutseepagemotionderivedbythetidalstressinthemodellayerisdeduced.ComparedthisequationwithBoultonequationusedintheunconfinedaquifer,anewlaggingsupplywatertermisobtained,whichestablishthephysicalbasisforinterpretingthephasedelayphenomenaofwellwaterlevelcausedbythesolidtide.Byanalyzingthepartialdif-ferentialequation,itisfoundthatthislaggingsupplytermisrelatedwiththefluctuationoftideoccurredinthedeepaquifer.

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简介：WeconsiderthebifurcationofsingularpointsnearadoublefoldpointinZ2-symmetricnonlinearequationswithtwoparameters,wherethelinearizationhasatwodimensionalnullspacespannedbyasymmetricnullvectorandanami-symmetricnullvector.Inparticular,weshowtheexistenceofaturningpointpathandapitchforkpointpathpassingihroughthedoublefoldpointandtheyaretheonlysingularpointsnearby.Theirnondegeneracyisconfirmed.Asupportingnumericalexampleisalsoprovided.Themaintoolsforouranalysisaswellasthecompulationaresomeextendedsystems.

简介：Plainconcreteisregardedasatwo-phasematerialcomprisingrandomlydistributedaggregatesandmortarmatrix.Aseriesofthree-pointbendingconcretebeamswithsymmetricorasymmetricdoublenotchesaremodeledusingthemodifiedrandomaggregategenerationandpackingalgorithm.Thecohesivezonemodelisusedasthefracturecriterionandthecohesiveelementsareinsertedintoboththemortarmatrixandtheaggregate-mortarinterfacesaspotentialmicro-crackingzones.Thedeadandalivecrackphenomenaarestudiedexperimentallyandnumerically;andtheinfluencesofnotchlocation,aggregatedistributionandgradationonfracturearenumericallyevaluated.Someimportantconclusionsaregiven.

简介：AbstractBackground:Surgical treatment of both-column acetabular fractures is challenging because of the complex acetabular fracture patterns and the curved surface of the acetabulum. Seldom study has compared the application of three-dimensional (3D) printing technology and traditional methods of contouring plates intra-operatively for the surgical treatment of both-column acetabular fractures. We presented the use of both 3D printing technology and a virtual simulation in pre-operative planning for both-column acetabular fractures. We hypothesized that 3D printing technology will assist orthopedic surgeons in shortening the surgical time and improving the clinical outcomes.Methods:Forty patients with both-column acetabular fractures were recruited in the randomized prospective case-control study from September 2013 to September 2017 for this prospective study (No. ChiCTR1900028230). We allocated the patients to two groups using block randomization (3D printing group, n = 20; conventional method group, n = 20). For the 3D printing group, 1:1 scaled pelvic models were created using 3D printing, and the plates were pre-contoured according to the pelvic models. The plates for the conventional method group were contoured during the operation without 3D printed pelvic models. The operation time, instrumentation time, time of intra-operative fluoroscopy, blood loss, number of times the approach was performed, blood transfusion, post-operative fracture reduction quality, hip joint function, and complications were recorded and compared between the two groups.Results:The operation and instrumentation times in the 3D printing group were significantly shorter (130.8 ± 29.2 min, t = －7.5, P < 0.001 and 32.1 ± 9.5 min, t = －6.5, P < 0.001, respectively) than those in the conventional method group. The amount of blood loss and blood transfusion in the 3D printing group were significantly lower (500 [400, 800] mL, Mann-Whitney U= 74.5, P < 0.001 and 0 [0,400] mL, Mann-Whitney U = 59.5, P < 0.001, respectively) than those in the conventional method group. The number of the approach performed in the 3D printing group was significantly smaller than that in the conventional method group (pararectus + Kocher-Langenbeck [K-L] approach rate: 35% vs. 85%; x2 = 10.4, P < 0.05). The time of intra-operative fluoroscopy in the 3D printing group was significantly shorter than that in the conventional method group (4.2 ± 1.8 vs. 7.7 ± 2.6 s; t = －5.0, P < 0.001). The post-operative fracture reduction quality in the 3D printing group was significantly better than that in the conventional method group (good reduction rate: 80% vs. 30%; x2 = 10.1, P < 0.05). The hip joint function (based on the Harris score 1 year after the operation) in the 3D printing group was significantly better than that in the conventional method group (excellent/good rate: 75% vs. 30%; x2 = 8.1, P < 0.05). The complication was similar in both groups (5.0% vs. 25%; x2 = 3.1, P = 0.182).Conclusions:The use of a pre-operative virtual simulation and 3D printing technology is a more effective method for treating bothcolumn acetabular fractures. This method can shorten the operation and instrumentation times, reduce blood loss, blood transfusion and the time of intra-operative fluoroscopy, and improve the post-operative fracture reduction quality.Clinical trail registration:No.ChiCTR1900028230; http://www.chictr.org.cn

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简介：Amantadine(AMA)是在养蜂过去常保护蜜蜂免于sacbrood病毒(Moratoraetatulae)的抗病毒的药。这研究描述了可靠高效的液体色析法(HPLC)为用稳固阶段的抽取(SPE)在蜂蜜分析AMA的方法为纯化的子弹(PlexaPCX)，4-fluoro-7-nitro-2,1,3-benzoxadiazole(NBD-F)作为一个列前derivatization代理人，和fluorometric察觉(ex=470nm，em=530nm)。色析法的分离在XDBC18列上被执行(150

简介：LigninservesasoneofthemostimportantmolecularfossilsfortracingTerrestrialOrganicMatters(TOMs)inmarineenvironment.Extractionandderivatizationofligninoxidationproducts(LOPs)arecrucialforaccuratequantificationoflignininmarinesediment.Herewereportamodificationoftheconventionalalkalinecupricoxide(CuO)oxidationmethod,themodificationconsistinginasolidphaseextraction(SPE)andanovelon-columnderivatizationbeingemployedforbetterefficiencyandreproducibility.Inspikingblanks,recoverieswithSPEfortheLOPsarebetween77.84%and99.57%withrelativestandarddeviations(RSDs)rangingfrom0.57%to8.04%(n=3),whilethosewithtraditionalliquid-liquidextraction(LLE)arefrom44.52%to86.16%withRSDsbeingfrom0.53%to13.14%(n=3).Moreover,thereproducibilityisgreatlyimprovedwithSPE,withlesssolventconsumptionandshorterprocessingtime.Theaverageefficiencyofon-columnderivatizationforLOPsis100.8%±0.68%,whichissignificantlyhigherthanthoseofin-vialorin-syringederivatization,thusresultinginstilllessconsumptionofderivatizingreagents.LignininthesurfacesedimentssampledfromthesouthofYangtzeRiverestuary,China,wasdeterminedwiththeestablishedmethod.Recoveriesof72.66%to85.99%withstandarddeviationlessthan0.01mg/10gdryweightareobtainedexceptforp-hydroxyben-zaldehyde.ThelignincontentΣ8(producedfrom10gdrysediment)intheresearchareaisbetween0.231and0.587mg.S/VandC/Vratios(1.028±0.433and0.192±0.066,respectively)indicatethattheTOMsinthisregionareoriginatedfromamixtureofwoodyandnonwoodyangiospermplants;thehighvaluesof(Ad/Al)vsuggestthattheTOMshasbeenhighlydegraded.

简介：ThepaperdealswiththecomputationandbifurcationanalysisofdoubleTakens-Bogdanovpoint(u0,∧0)(inshort,DTBpoint)intheZ2-equivariablenonlinearequationf(u,∧)=0,f:U×R4→V,whereUandVareBanachspaces,parameters∧∈R4.At(u0,∧0),thenullspaceoffu0hasgeometricmultiplicity2andalgebraicmultiplicity4.FirstlyaregularextendedsystemforcomputingDTBpointisproposed.Secondly,itisprovedthattherearefourbranchesofsingularpointsbifurcatedfromDTBpoint:twopathsofSTBpoints,twopathsofTB-Hopfpoints.Finally,thenumericalresultsofonedimensionalBrusselatorequationsaregiventoshowtheeffectivenessofourtheoryandmethod.

简介：很好相对结晶，高方面比率Mg-Al分层的双氢氧化物(LDH)被一起沉淀过程在水的答案并且进一步准备对器官的修改LDH(OLDH)含水面对表面活化剂。设置的结构和OLDH的高方面比率被X光检查衍射(XRD)和扫描电子显微镜学(SEM)验证。一系列poly(丙烯碳酸盐)(PPC)/OLDH有OLDH的不同内容的合成电影经由一个融化混合方法被准备。他们的生气的节形态学，煤气的障碍性质和张力的力量作为OLDH内容的功能被调查。SEM结果证明OLDH血小板很好在composites和面向的平行以内被驱散到合成的表飞机。煤气的障碍性质和张力的力量显然在OLDH的加入之上被提高。特别地，PPC/2%OLDH电影在所有合成电影之中展出最好的障碍性质。与纯PPC相比，氧渗透系数(OP)和水蒸汽渗透系数(WVP)被54%和17%与2%OLDH增加分别地减少。而且，PPC/2%OLDH的张力的力量比纯PPC与的高是83%仅仅小在裂缝延伸输。因此，PPC/OLDH合成电影在由于它的可被细菌破坏的性质，优异的氧和潮湿障碍特征包装材料显示出大潜在的申请。

简介：Atheoreticalinvestigationiscarriedoutintothecrossphasemodulation(XPM)inanasymmetricdoubleAlGaAs/GaAsquantumwellsstructurewithacommoncontinuum.Itisfoundthat,combiningresonanttunneling-inducedtransparencyandconstructiveinterferenceinthethird-orderKerreffect,agiantXPMcanbeachievedwithvanishinglinearandnonlinearabsorptions,accompaniedbythevelocitiesoftheprobeandsignalfieldsbeingmatched.Furthermore,thisgiantXPMcouldinduceaπ-phaseshiftatasingle-photonlevelwhichisfavorablefortheapplicationsintwo-qubitquantumlogicgates.

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