简介：TheeffectofstressdistributionduetothechangesofthedistalscrewalignmentinrelationtotheGammanailandthefemoralshaftisthoroughlystudiedinthispaper.FailureoftheGammanailcompositeoccursthroughthecranialapertureofthedistalscrewsandtheinsertionholeforthelagscrewduetononunion,delayed-unionandcontinuedweight-bearing.Athree-dimensionalfiniteelementmodelwasusedtostudythefracturedfemur,theGammanail,thelagscrewandthedistallockingscrews.ThefirstandtheseconddistalscrewswereinsertedintotheGammanailinfourdifferentconfigurations.WefoundthatthestressoftheGammanailcompositewassubstantiallyreducedwiththetwoscrewsconfiguredintheanteriortoposteriordirection.Thisalignmentcanbeargreaterloadinginthemoredemandingfracturetypes.Inthesubtrochantericfractureorthecomminutedfracturesattheproximalfemur,theoptimalalignmentofthetwodistalscrewswasintheanteriortoposteriordirection.

简介：客观：识别简历螺丝钉的放置的thoracicextrapedicular途径的机械可行性。方法：到T_8的从T_1的五新鲜成年cadavericthoracics松被收获。螺丝钉也被虱子的途径orextrapedicular途径插入。结果统计上被观察，由经由脊椎动物的sagittal轴的虱子的螺丝钉途径和额外的虱子的螺丝钉途径的撤退力量被测量并且比较。结果：在胸的虱子的途径，小花梗全体乘务员的撤退强度是220N(288.2-1561.7N)和胸的额外的虱子的螺丝钉的接近的1001.23N±was827.01N±260N当螺丝钉通过横向的过程被插入到vertebrae时，并且954.25N±254N什么时候拧紧，通过小花梗的侧面的外皮被插入到vertebrae。与虱子的组相比，在额外的虱子的组的撤退强度被4.7%inserted通过横向的过程减少(P>0.05)并且通过侧面的外皮(P<0.05)在17.3%插入了。由额外的虱子的途径的吝啬的撤退力量被11.04%作为与虱子的途径相比减少(P<0.05)。结论：当它是难的由虱子的途径插入时，在胸的脊骨插入虱子的螺丝钉机械地是可行简历到useextrapedicular螺丝钉技术。

简介：Aplasticdeformationzonenearascrewdislocationistreatedasanequivalenttrans-formationinclusionbymeansoftheEshelbyinclusiontheory.Aclosed-formsolutionfordeter-miningtheinteractionbetweenascrewdislocationandaplasticallydeformedzoneofanarbitraryshapeisobtainedbyusingthesolutionbetweenadislocationandanequivalenttransformationinclusion.

简介：客观：为了选择腰部的transpedicular的一个合适的方法，在三个方法之中在不同腰部的层次拧紧固定(Roy-Camille“s方法，Magerl”s方法和杜“smethod)在中国人口。方法：三维(3-D)图象与被电子横梁CT扫描的42个成年腰部的片断的图象数据被重建。腰部的小花梗螺丝钉固定的三个方法在3-D上被模仿重建的图象和植入小花梗螺丝钉的参数被测量。结果：在从入口点的距离有统计上重要的差别到在三个方法之间的小花梗轴(P<0.001)。Thedistances由“s方法从L1是最短的到L4，并且距离测量了byMagerl”的杜测量了s方法在L5是最短的(P<0.05)。从L1没有重要差别到L2(P>0.05)，但是对在插入TSA(横向的节角度)的安全范围的L5的从L3的重要差别在三个方法之间被发现(P<0.05)。从L3到L4，TSA的插入的安全范围由杜测量了“s”和Magerls方法比那测量byRoy-Camille显著地大“s方法(P<0.05)，但是他们之间没有重要差别(P>0.05)。AtL5，TSA的插入的安全范围由Magerl测量了“s方法在三个方法之中是最大的(P<0.05)。结论：在三个方法之中，杜“因为它到小花梗轴的从入口点的距离最短，TSA的安全范围最大，s方法是从L1toL4的最好的选择；Magerl“s方法能从L3被使用到L5并且是在L5的最好的选择；Roy-Camille”s方法在L1和L2是适用的。

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简介：Inrecentyearsthepediclescrewsystemhasbeenwidelyusedintreatingthoracolumbarvertebralfractures.Theeffecttorecovertheinjuredvertebraeheight,thespinalphysiologicalcurveandtodecompressvertebralcanalhasbeenconfirmed.Buttheproblemsofinternalfixationbending,looseningandbreaking,whichresultinthelossofthevertebralheightandspinalangulationdeformity,arequitecommonandcausealotofdifficultiesforsurgeons.Tosolvetheseproblemsanddecreasethesequelaefromtreatingthoracolumbarvertebraefractureswithvertebralpediclescrewsystem,wehavetriedusingvertebralpediclescrewsystemplusACPCperfusiontotreat18patientswiththoracolumbarvertebralfractures.Satisfactoryresultshavebeenobtained.

简介：Particlemotioninascrewconveyorwassimulatedw让hthediscreteelementmethod.Theparticleflowbehaviorandtransportprocessesatdifferentscrewrotatingspeedsandfillinglevelswereinvestigatedinthisstudy.Thespatialdistributionsofparticlevelocitywerepredicted.Thepredictedmassflowrateincreasedw让hincreasingscrewrotatingspeedandfillinglevel.Thecontactforcesandgranulartemperaturesofparticleswerealsocalculated.Thesimulationresultsshowedthatthetranslationalgranularparticletemperatureswerehigherthantherotationalgranularparticletemperatures.Inadd让ion,theconfigurationaltemperaturesofparticleswerecalculatedfromsimulatedinstantaneousparticleoverlaps,andresultsindicatedthatdeformationofelasticparticlescontributedtotherateofenergydissipation.Goodagreementbetweenthenumericalsimulationandexperimentalresultswasachievedinthisstudy.

简介：借助于Tersoff和莫尔斯潜力，三维的分子的动力学模拟被执行显微镜学切在硅上学习原子力量单音的水晶表面。内部在细工品和大头针工具和细工品的原子之间的原子力量自己被计算。螺丝钉脱臼被介绍进细工品Si。脱臼的运动不在切处理的原子力量显微镜学期间发生，这被发现。模拟结果证明shear强调对脱臼起作用在Si的收益力量下面是远的。

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简介：Thispaperdealswiththeelectro-elasticcouplinginteractionbetweenapiezoelectricscrewdislocationwhichislocatedinsidetheellipticalinhomogeneityandanelectricallyconductiveconfocalrigidlineunderremoteanti-planeshearstressesandin-planeelectricalloadsinpiezoelectriccompositematerial.Theanalytical-functionsofthecomplexpotentials,stressfieldsandtheimageforceactingonthepiezoelectricscrewdislocationareobtainedbasedontheprincipleofconformalmapping,themet...

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简介：Theunsteadyflowofviscousincompressibleshear-thinningnon-Newtonianfluidwithmixedboundaryisinvestigated.Theboundaryconditionontheoutflowisthemodifiednaturalboundarycondition,itcontainstheadditionalnonlinearterm,whichenablesustocontrolthekineticenergyofthebackwardflow.Theglobalexistenceofweaksolutionisproved.Thefictitiousdomainmethodwhichconsistsinfillingthemovingrigidscrewswiththesurroundingfluidandtakingintoaccounttheboundaryconditionsonthesebodiesbyintroducingawell-chosendistributionofboundaryforcesisused.

简介：从一个螺丝钉出版社的米饭糠蛋糕或分泌物的外观对应于在抽取过程生产的油的水平。在操作背景，油抽取水平和蛋糕外观之间的关系被学习。蛋糕特征可靠地显示期望的油恢复抽取水平。这些结论适用于两Chainat1米饭糠和parboiled米饭糠。变量是螺丝钉出版社(在从8.5～19.8r/min的五个层次的集合)和在螺丝钉和桶(在1.0和1.9厘米之间的集合)之间的相应清理距离的速度。结果证明抽取的最大的层次为米饭糠是4.17%并且8.20%为parboiled米饭糠。在最大的抽取水平，仪器连续地解除了难的蛋糕，易碎，片状，在一个方面上晴朗、擦亮却在其它上迟钝、粗糙。

简介：Anatmospheric-pressureargonplasmajetwithscrewring-ringelectrodesinsurfacedielectricbarrierdischargeisgeneratedbyasinusoidalexcitationvoltageat8kHz.Thedischargecharacteristics,suchasrotationalandvibrationaltemperatureofnitrogen,electronicexcitationtemperature,oxygenatomicdensity,nitrogenmoleculardensity,andaverageelectrondensity,areestimated.Itisfoundthattherotationaltemperatureofnitrogenisintherangeof352～392KbycomparingthesimulatedspectrumwiththemeasuredspectrumattheC3Πu→B3Πg(△ν=2)bandtransition,theelectronicexcitationtemperatureisfoundtobeintherangeof3127～3230KbyusingtheBoltzmannplotmethod,theoxygenatomicandnitrogenmoleculardensityareoftheorderofmagnitudeof1016cm-3bytheactinometrymethod,andtheaverageelectrondensityisoftheorderofmagnitudeof1012cm-3bytheenergybalanceequation.Besides,theeffectivepower,conduction,anddisplacementcurrentaremeasuredduringthedischarge.