简介：AlthoughrainfallisrareontheLoessPlateauofwesternChina,landslidesoccurfrequentlythereinrainyseason.Surveysreportthatlandslidehazardsalwaysfollowheavyrains.Inthisstudy,aseepage-stresscouplingmodelforrainfallinducedlandslideisusedtoexamineanactualdisastrouseventinYulinbytheendofJuly,2017.Theeffectsofrainfallduration,rainfallintensityandsoilweakeningonslopestabilityarestudiedindetail.Theresultsillustratethatthesafetyfactordropssharplyatfirstandthenisgraduallydecliningtobelow1.05duringadditionaltwodaysofheavyrain.Withsoilstrengthsofteningconsidered,theslopewouldbemoreunstable,inwhichtheweakeninginsoilcohesionisfoundtobeamoresensitivefactor.

简介：Thestabilityofriverbankssubjecttoseepageisstudiedexperimentallyandtheoreticallyinthispaper.Byincludingseepageina3-dimensionaltheoreticalanalysis,thestudyfirstshowshowthecriticalslopeorangleofreposeofacohesionlessmaterialisrelatedtotheratioofthehydraulicgradientofseepagetoitscriticalvalueunderthefluidizationcondition.Thecriticalstableslopeisshowntoberelatedtonotonlythehydraulicgradientbutalsotheseepagedirection.Measuredlaboratorydatareasonablyfitwellwiththetheoreticalrelationshipforthecaseofinjectionandsuction.Thedatarevealthattheslopeisreducedwithinjectionandincreasedwithsuction,respectively.Additionally,thestudyidentifiestheseepagedirectionwhichresultsinaminimumcriticalstableslopeforacertainhydraulicgradientofseepage.

简介：柏油的具体核心(ACC)水坝广泛地在中国被造。许多ACC水坝执行井，而是其它在此处学习的西方的中国包括盒子经历了重要的漏。浸透不饱和的水流动的一个数字模特儿被适应通过水坝模仿渗出物。由在不同条件下面比较正常、反常的渗出物地，为实际反常渗出物地的主要原因被识别并且在转变地区(TZ)和下游的水坝壳在ACC和非计划中的、低渗透层(LPL)归因于一个缺点。这些结论与水坝的状况和表演一致。不适当的ACC构造过程可能在ACC引起了缺点。ACC厚度的一个突然的变化可能导致了压力集中并且引起了ACC失败。为TZ和水坝壳的材料来源从说明，和土壤阶段复杂、变化因为TZ不充分地被控制。特别地，测试证明渗透在水坝的这二部分在大范围上变化。意外LPL可能在两个区域存在，并且连续地延长。

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简介：Angiogenesis在出生后的生命期间在胚胎的脉管的树的发展以及处于几个正常、病理学的条件起一个基本作用。Bloodsupply，由neovascularization建立了，在愈合弯屈期间为histogenesis是必要的以及变长的手足在骨胳的损伤sequalae的治疗广泛地适用。Butlittle注意对这个区域被给予了。这评论试图在机械应力下面总结angiogenesis规定，在愈合的创伤中的angiogenesis的过程和angiogenesis，特别地与紧张压力原则联合。

简介：Themovementofwaterflowinunsaturatedfracturedrockwasinvestigatedwiththesandstonesamplethroughexperimentalresearchandnumericalsimulation.Theexperimentalresultsshowthatthearrivingtimeofwettingfrontisdelayedbythefracture,resultingintheincreaseofwatersaturationinthedomainontheupstreamsideofthefracture,whichwilllocallyenhancewaterflowthroughthematrix.Thenumericalsimulationwiththefinitevolumemethodcaptureseffectivelythesecharacteristics.Thecomparisonbetweensimulatedandobservedtraveltimeandarrivingtimeofwettingfrontshowsthattheirdifferenceareverysmallandthesimulatedresultsareinagreementwiththeobservedresults,whichimpliescalibratedparametersarereliableandeffective.Thenaccordingtothecalibratedparameters,fracturedmodelswereestablishedtoexaminehowthechangeoflargefracturedaperturewouldaffectthearrivingtimeofwettingfronts,pressureheadsandwatersaturationontheupstreamanddownstreamsidesoffracture.

简介：Undertheconditionthatallthestresscomponentsatacrack-tiparethefunctionsofθonly,makinguseofequilibriumequationsandhydrostaticstress-dependentyieldcondition,inthispaper,wederivethegenerallyanalyticalexpressionsofthehydrostaticstress-dependentperfectly-plasticstressfieldsatastationaryplane-stresscrack-tip.Applyingthesegenerallyanalyticalexpressionstotheconcretecracks,theanalyticalexpressionsofhydrostaticstress-dependentperfectly-plasticstressfieldsatthetipsofmodeⅠandmodeⅡcracksareobtained.

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简介：铁人王进喜同志生前有一句铮铮名言：“井没压力不出油，人无压力轻飘飘。”人需要压力来产生动力，但压力过大又会使人萎靡不振。西方有句谚语这样说：“最后一棵草会压垮骆驼背。”如何把压力减少到一个适当的程度呢？

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简介：在华南海把水泡羽毛的出现特征用作一本参考书，这份报纸继续学习水泡羽毛在冷渗出物生产的地震回答活跃区域。使羽毛建模计划更合理，我们修改了原来的建模计划并且重建一个羽毛水身体模型基于它是的半径的变化，水泡在海水升起。羽毛射击集合的地震记录被前面的模拟获得。单个射击的地震记录显示出一个散布波浪领域的明显的特征和模型的周期的特征。射击集合的地震记录用prestack深度移植被处理。它的成像节的边界有好集中效果。迁居节能与更高的精确性清楚地被想象。上述的研究再次为羽毛生产的地震回答的进一步的学习打了一个基础。他们逐渐地也探查了为羽毛处理方法的一个更合适的地震数据并且为羽毛的鉴定提供了理论指导。

简介：随着生活节奏的加快，形态迥异的压力接踵而来：生存压力、升学压力、工作压力等，这一切无不困扰着我们的生活与学习。对于压力你又了解多少呢？你又有什么样的妙招儿对付它呢？现在的你正承受着什么样的压力？本文以假日压力为例，帮你认识并缓解压力。一起加入到减压的队伍中来吧!

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简介：Thereare13papersinthisspecialissueonstressfield,crustaldeformationandseismicity.ThegreatWenchuanearthquakeisagrievousdisaster,butChinesescientistsaretryingtolearnmorefromtheeventinordertounderstandbetterthephysicsofearthquakesfor

简介：Ithasbeenwellrecognizedthat,duetoanisotropicpackingstructureofgranularmaterial,thetruestressinaspecimenisdifferentfromtheappliedstress.However,veryfewresearcheffortshavebeenfocusedonquantifyingtherelationshipbetweenthetruestressandappliedstress.Inthispaper,wederiveanexplicitrelationshipamongappliedstresstensor,material-fabrictensor,andforce-fabrictensor;andweproposearelationshipbetweenthetruestresstensorandtheappliedstresstensor.Thevalidityofthisderivedrelationshipisexaminedbyusingthediscreteelementsimulationresultsforgranularmaterialunderbiaxialandtriaxialloadingconditions.

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简介：压力是日常生活中的正常组成部分，通常每天都会出现。以下就是你可以应付压力的方法。

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