简介:Anadaptivefuzzyslidingmodecontrol(AFSMC)approachisproposedforaroboticairship.First,themathematicalmodelofanairshipisderivedintheformofanonlinearcontrolsystem.Second,anAFSMCapproachisproposedtodesigntheattitudecontrolsystemofairship,andtheglobalstabilityoftheclosed-loopsystemisprovedbyusingtheLyapunovstabilitytheorem.Finally,simulationresultsverifytheeffectivenessandrobustnessoftheproposedcontrolapproachinthepresenceofmodeluncertaintiesandexternaldisturbances.
简介:ObjectivePatientswithunilateraleardischargeandhearinglossoftenhaveexternalormiddleeardiseases.Wepresenta55-year-oldmanwhosufferedfrompersistenteardischargeandhearinglossintheleftear.Localfindingsshowedthathisleftearcanalwasfilledwithalargeamountofgranulationtissue,withpurulent,foul-smellingdischarge.Computedtomographyindicatedleftmiddleearcholesteatomaandmassshadowintheleftexternalauditorycanal.Modifiedradicalmastoidectomywasperformed.Apieceofwhiteplasticstickwasfoundinthemiddleearduringtheoperation.Foreignbody-inducedcholesteatomaandexternalauditorycanalgranulomainadultsareveryrare.Wepresentthisrarecasesothattheseconditionscanbebetterrecognizedandunderstood.
简介:有约束力的精力和浅施主杂质的空效果精力移动在拉紧的GaN/AlxGa1xN球形的有限潜力的量声明点(QD)基于有效集体近似用一个变化方法是计算的。有约束力的精力作为点尺寸和静水力学的压力的功能被计算。数字结果证明杂质州的有约束力的精力增加,达到最大的值,然后当QD半径为任何电场增加,减少。而且,有约束力的精力为点的任何尺寸与压力增加。为大点尺寸的杂质精力的空移动为小点尺寸比那大得多,并且它被电场的增加提高。我们有或没有紧张效果比较杂质状态的有约束力的精力,并且结果证明紧张效果更加提高杂质绑定精力,特别为小QD尺寸。我们也在我们的工作考虑绝缘的失配。