简介：Withtheincreasingimportanceofoceanexploitation,providinganti-rollingstabilityforshipsatanchorhasbecomemoreandmoreimportant.Thelift-generationtheoryoftraditionalfinstabilizersisbasedonincomingflowvelocity,whichisnotsuitableforexplainingliftgeneratedatanchor.Weanalyzednon-steadyflows,withforcesonfinstabilizersgeneratedbynon-incomingflowvelocityconditions,andgaveanewlift-generationmodel.Thecorrectnessofthemodelwasprovenbycomparingexperimentalresultsoffinstabilizermotionundernon-incomingvelocityconditionsfromthefluidcomputationsoftwarewiththatfromtheemulatorofthelift-generationmodel.Finally,themodelwasusedinananti-rollingsystemonashipandthereductionofrollwasmuchbetterthanwhatcouldbeachievedbypassiveanti-rollingtanks.

简介：Geographiclocationofnodesisveryusefulinasensornetwork.Previouslocalizationalgorithmsassumethatthereexistsomeanchornodesinthiskindofnetwork,andthenothernodesareestimatedtocreatetheircoordinates.Oncetherearenotanchorstobedeployed,thoselocalizationalgorithmswillbeinvalidated.Manypapersinthisfieldfocusonanchor-basedsolutions.Theuseofanchorsintroducesmanylimitations,sinceanchorsrequireexternalequipmentssuchasglobalpositionsystem,causeadditionalpowerconsumption.Anovelpositioningalgorithmisproposedtouseavirtualcoordinatesystembasedonanewconcept-virtualanchor.Itisexecutedinadistributedfashionaccordingtotheconnectivityofanodeandthemeasureddistancestoitsneighbors.Boththeadjacentmemberinformationandtherangingdistanceresultarecombinedtogeneratetheestimatedpositionofanetwork,oneofwhichisindependentlyadoptedforlocalizationpreviously.Atthepositionrefinementstagetheintermediateestimationofanodebeginstobeevaluatedonitsreliabilityforpositionmutation;thusthepositioningoptimizationprocessofthewholenetworkisavoidedfallingintoalocaloptimalsolution.Simulationresultsprovethatthealgorithmcanresolvethedistributedlocalizationproblemforanchor-freesensornetworks,andissuperiortopreviousmethodsintermsofitspositioningcapabilityunderavarietyofcircumstances.

简介：Thepenetrationdepthoftorpedoanchorintwo-layeredsoilbedwasexperimentallyinvestigated.Atotalof177experimentaldatawereobtainedinlaboratorybyvaryingtheundrainedshearstrengthofthetwo-layeredsoilandthethicknessofthetopsoillayer.Thegeometricparametersoftheanchorandthesoilproperties(theliquidlimit,plasticlimit,specificgravity,undrainedshearstrength,density,andwatercontent)weremeasured.Basedontheenergyanalysisandpresenttestdata,anempiricalformulatopredictthepenetrationdepthoftorpedoanchorintwo-layeredsoilbedwasproposed.Theproposedformulawasextensivelyvalidatedbylaboratoryandfielddataofpreviousresearchers.Theresultswereingoodagreementwiththoseobtainedfortwo-layeredandsingle-layeredsoilbed.Finally,asensitivityanalysisontheparametersintheformulawasperformed.

简介：Anumericalmethodisproposedfortheelasto-plasticityandpore-pressurecoupledanalysisonthepulloutbehaviorsofaplateanchor.Thebounding-surfaceplasticity(BSP)modelcombinedwithBiot’sconsolidationtheoryisemployedtosimulatethecyclicloadinginducedelasto-plasticdeformationofthesoilskeletonandtheaccompanyinggeneration/dissipationoftheexcessporewaterpressure.Thesuctionforcegeneratedaroundtheanchorduetothecyclicvariationoftheporewaterpressurehasmucheffectonthepulloutcapacityoftheplateanchor.Thecalculatedpulloutcapacitywiththeproposedmethod(i.e.,thecoupledanalysis)getslowerthanthatwiththeconventionaltotalstressanalysisforthecaseoflong-termsustainedloading,butslightlyhigherforthecaseofshort-termmonotonicloading.Thecyclicloadinginducedaccumulationofporewaterpressuremayresultinanobviousdecreaseofthestiffnessofthesoil-plateanchorsystem.

简介：摘要冠状动脉支架内慢性完全闭塞（IS-CTO）病变是慢性完全闭塞病变的一种特殊类型，导丝无法通过IS-CTO病变或通过支架网眼进入支架金属梁后内膜下空间是导致IS-CTO病变经皮冠状动脉介入治疗（PCI）失败最常见的原因。笔者提出Anchor-Knuckle技术，即将OTW球囊同轴锚定技术和弯曲导丝技术相结合，用于快速、高效开通长段IS-CTO病变。该文报道的两例患者分别采用Anchor-Knuckle技术成功开通左回旋支和右冠状动脉IS-CTO病变。

简介：Atpresent,mostunderwaterpositioningalgorithmsimprovethepositioningaccuracybyincreasingthenumberofanchornodeswhichresultingintheincreasingenergyconsumption.Tosolvethisproblem,thepaperproposesalocalizationalgorithmassistedbymobileanchornodeandbasedonregiondetermination(LMRD),whichnotonlyimprovesthepositioningaccuracyofnodespositioningbutalsoreducestheenergyconsumption.Thisalgorithmisdividedintotwostages:regiondeterminationstageandlocationpositioningstage.Intheregiondeterminationstage,thetargetregionisdividedintoseveralsub-regionsbytheregiondivisionstrategywiththesmallestoverlapratewhichcanreducethenumberofvirtualanchornodesandlockthetargetnodetoasub-region,andthenthroughtheplanningofmobilenodestooptimizethetravelpath,reducethemovingdistance,andreducesystemenergyconsumption.Inthelocationpositioningstage,thetargetnodelocationcanbecalculatedusingtheHILBERTpathplanningandtrilateration.Thesimulationresultsshowthattheproposedalgorithmcanimprovethepositioningaccuracywhentheenergyconsumptionisreduced.

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简介：AbstractPurpose:The main aim is to provide clinical reference for the application of mini suture anchor in the reduction and fixation of displaced temporomandibular joint (TMJ) disc with intracapsular condylar fracture.Methods:From October 2018 to October 2019, 21 patients (31 sides) with intracapsular condylar fractures and articular disc displacement from West China Hospital of Stomatology, Sichuan University were included. The selection criteria were: (1) mandibular condylar fractures accompanied by displacement of the TMJ disc, confirmed by clinical examination, CT scan and other auxiliary examinations; (2) indication for surgical treatment; (3) no surgical contraindications; (4) no previous history of surgery in the operative area; (5) no facial nerve injury before the surgery; (6) informed consent to participate in the research program and (7) complete data. Patients without surgical treatment were excluded. The employed patients were followed up at 1, 3, 6 and 12 months after operation. Outcomes were assessed by success rate of operation, TMJ function and radiological examination results at 3 months after operation. Data were expressed as number and percent and analyzed using SPSS 19.0.Results:All the surgical procedures were completed successfully and all the articular discs were firmly attached to the condyles. The articular disc sufficiently covered the condylar head after the fixation. The fixation remained stable when the mandible was moved in each direction by the surgeons. No complications occurred. The functions of the TMJ were well-recovered postoperatively in most cases. CT scan revealed that the screws were completely embedded in the bone without loosening or displacement.Conclusion:Mini suture anchor can provide satisfactory stabilization for the reduced articular disc and also promote the recovery of TMJ functions.

简介：目的探讨AnchorAttachment蛋白(AAP)的表达与结直肠癌浸润和转移的关系及临床意义。方法采用免疫组织化学方法检测83例结直肠癌患者的正常肠黏膜、癌原发灶、转移淋巴结及肝转移灶中AAP的表达,并分析AAP表达水平与肿瘤临床病理特征之间的关系。结果结直肠正常肠黏膜、癌原发灶、淋巴结和肝转移灶中AAP的表达阳性率分别为20.5%、53.0%、69.8%和80.0%;癌原发灶、转移淋巴结和肝转移灶中AAP表达阳性率均显著高于正常肠黏膜组织(x~2=42.349,P<0.01),转移淋巴结和肝转移灶中AAP阳性率又高于癌原发灶(x~2=6.666,P<0.05);淋巴结转移患者和肝转移患者的原发灶AAP阳性率显著高于无转移者(x~4=10.056,7.705,P<0.01);Dukes分期A、B、C、D期患者AAP阳性率逐渐增高,各分期之间差异有统计学意义(x~2=12.313,P<0.01)。83例结直肠癌患者血清AAP水平为(6.3±2.8)ng/ml,30例健康志愿者AAP水平为(2.2±0.9)ng/ml,两者差异有统计学意义(t=6.976,P<0.01);Dukes分期A、B期患者血清AAP水平为(5.2±2.6)ng/ml,C、D期患者AAP水平为(7.1±2.9)ng/ml,两者差异有统计学意义(t=2.028,P<0.05)。结论AAP增强表达与结直肠癌浸润和转移密切相关,检测外周静脉血AAP水平对预测和判断结直肠癌局部复发和肝转移有重要意义。

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