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简介：MakinguseoftheZ2×Z2symmetry,wecouldstudythestructurenearmultipleS-treakingturningpoints.Inparticular,weshowthatthereexisttwokindsofsingularpointpaththroughdoubleSbreakingturningpointsandtripleSbieakingturningpoints,onetsquadraticturningporntpathandoneisquadraticpitchforkbifurcationpointpath.SomesimpleregularextendedsystemstocornputedoubleandtripleS-breakingturningpointsareproposed.Numericalexamplesarealsogreen

简介：TagTeamsbossMattKaglerratherexportsChinesebandstotheUSIF,asvisitsbyBrianEnoandSonicYouthtothecitywouldsuggest,Beijinghasarealscenenow,whyisn'tTagTeamRecordssigningmorebands?'Because

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简介：Inthispaperthepropagationandbreakingofthesolitarywave,thesinusoidalwaveandthesecondStokeswaveonaslopeof1/30arediscussedbasedupontheTUMMACmethod,andthevelocityfieldsofbreakingwavesontheslopeareobtainedbyusingthetracingmethod.The.numericalresultsforwavedeformationareingoodagreementwithexperimentaldata,andthebreakerindexesdependingonthekineticcriterionagreeapproximatelywithprevi-ousresults.Furthermore,comparedwiththeexperimentalresultsmeasuredbyIwagakiandbytheauthors,thetendencyofvelocitydistributionofbreakingwavescomputedbythisnumericalmethodisalsosatisfactory.

简介：Wavelettransformisaparticularlyusefultooltocharacterizetran-sientphenomenasuchaswavebreaking.Inthispaper,weapplywavelettransformtothedetectionandquantificationofthebreakingwaves.Weuseanewmethodthatusesthelocalpropertiesofwavelettransformtodetectandquantifythebreak-ingwavesandgivesomenewbreakingcriteria.Bycomparingthismethodwiththeclassicmethod,wefindthatwavelettransformisveryeffectiveinthedetectionofbreakingwaves.Withwavelettransform,asetofmeasuredwindwavedataisinves-tigated.Theresultshaverevealedsomepreviouslyunknownphenomenaaboutwavebreaking.

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简介：这份报纸学习为在一个泼出的沙滩上宣传的表面水波浪打破波浪的连续进化。一个Lagrangianasymptotic答案被导出。根据结合的解决方案，打破标准和水粒子运动，波浪变丑和连续波浪的方程碎的波浪处理因为进步的水飘动在一个泼出的底部上宣传能被导出。一系列实验也被进行与理论答案作比较。结果证明现在的答案罐头相当描述打破现象的跳入或掉下的波浪。

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简介：Particleimpactdrillingisanefficientdrillingtechnologyfordeep-wellhardformation,Withthistechnology,therockiscutmainlybyhigh-speedsphericalparticleimpactunderhydraulicaction.Inthisarticle,theinfluenceofjetflowfactors,hydraulicfactorsandabrasivefactorsonrockbreakingisstudiedthroughindoorexperimentsofimpactbysteelparticles.Theresultsindicatethattheparticlewaterjethasanoptimalstandoffdistanceandparticleconcentration;therockbreakingeffectdeclineswiththeincreaseoftheconfiningpressureandthedecreaseofthepumppressureandparticlediameter.Thisstudywillprovidesomefoodofthoughtforthedevelopmentofparticleimpactdrillingtechnology.

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简介：Asplittingiterationmethodisproposedtocomputesymmetry-breakingTakens-Bog-danovpoints.Themethodcouldreducethecomputationalworkandstorage,itcouldalsoconvergelinearlywithanadjustablespeed,Numericalcomputationshowstheeffectivenessofsplittingiterationmethod.

简介：AgeneralizedYang-Millsmodel,whichcontains,besidesthevectorpartVμ,alsoascalarpartS,isconstructedandthedynamicalbreakingofgaugesymmetryinthemodelisalsodiscussed.Itisshown,intermsofNambu-Jona-Lasinio(NJL)mechanism,thatthegaugesymmetrybreakingcanberealizeddynamicallyinthegeneralizedYang-Millsmodel.ThecombinationofthegeneralizedYang-MillsmodelandtheNJLmechanismprovidesawaytoovercomethedifficultiesrelatedtotheHiggsfieldandtheHiggsmechanismintheusualspontaneoussymmetrybreakingtheory.

简介：一辆数字波浪坦克被用来调查非强迫的波浪碎的发作和力量，并且波浪有起始的系列的三种类型：经常的振幅光谱，经常的险峻光谱和Pierson-Moscowitz光谱。数字测试被执行验证模型结果。然后，波浪碎的发作与几何、运动学、动态的碎标准被讨论。波浪碎的力量，它是总是由部分精力损失和碎力量系数描绘了，为不同系列被学习。结果显示出精力生长率怎么比估计部分精力损失以及碎力量系数上的起始的波浪险峻好。

简介：-Thedynamicresponsebehaviorsofuprightbreakwatersunderbrokenwaveimpactareanalysedbasedonthemass-damper-springdynamicsystemmodel.Theeffectsofthemass,damping,stiffness,naturalperiod,andimpulseduration(oroscillationperiod)onthetranslation,rotation,slidingforce,overturningmoment,andcorrespondingdynamicamplifyingfactorsarestudied.Itisconcludedthattheampli-yingfactorsonlydependontheratioofthesystemnaturalperiodtoimpulseduration(oroscillationperiod)underacertaindampingratio.Moreover,theequivalentstaticapproachtobreakwaterdesignisalsodiscussed.

简介：AbstractMarking the end of the five-year programme initiated by the Chinese Government to lift more than 70 million people out of poverty, the year 2020 is a milestone. Poverty alleviation has moved strongly forward in China and the major health indicators are now better than the average of all middle- and high-income countries. However, the dual burden of infectious and chronic diseases remains a challenge with respect to achieving the health target in the United Nations 2030 Agenda for sustainable development goals (SDGs). In 2015, about 44% of the poor population in China were impoverished by illness but already in 2018, multi-sectoral actions delivered by the Health-related Poverty Alleviation programme had reduced the number almost by half. In the past three years 15 million poor people (98% of the poor population) with infectious and chronic diseases had been treated and taken care of thanks to financial support through multiple health insurance schemes and other governmental subsidies. This article discusses the lessons learnt with regard to health-related poverty alleviation in China with special reference to those still remaining impoverished by illness. Consolidation of the achievements reached and provision of basic needs to those still disadvantaged and in poor health will require a major improvement of accessibility to, and affordability of, health services. The next step towards enhanced productivity and better living conditions will involve upgrading of the capacity of health professionals in the poor regions, promotion of coherent efforts in health-related poverty alleviation and rural revitalization measures. As an additional measure, data monitoring and research on health poverty alleviation should be strengthened as they are essential to generate the evidence and knowledge needed to support the move in the direction envisioned by the SDGs, and the new Healthy China 2030 programme.

简介：Gainingathoroughunderstandingofthetheoreticalprinciplesofrockbreakingwithadisccutterisacriticalissueintunnelboringmachine(TBM)technology.Tofullyconsiderthecomplexityandimportanceofthebasicprinciplesofrockbreakingduringtunnelexcavation,inthispaperweuseanewmethod,thesmoothparticlehydrodynamics(SPH),tostudytherock-breakingmechanismandverifyitsaccuracyandfeasibility.UsingtheSPHmethod,weinducetherockfragmentationprocesswithtwocuttersinsynchronousandsequentialorders.Theresultsshowthatwhenthecuttersactonrocksequentially,thesecondindentationinfluencesthecrackevolutionofthefirstindentation.Withincreasedcutterspacing,thesecondcrackgraduallybecomesindependentofthefirstcrack.Undersynchronousactionofthetwocutters,abursiformnucleusisgeneratedbeneaththecuttersandtheareaofthenucleusincreaseswithincreasedcutterspacing.Whetherthecuttersactontherocksequentiallyorsynchronously,wefoundtheoptimumcutterspacingofourchosenrocktypetobe60mm.Ouranalysesresultsshowthattheefficiencyofsequentialrockcuttingissuperiortosynchronouscutting,bothwithrespecttocrackevolutionandcutterforce.