简介：瞄准：评估对在有动脉的可勃起的机能障碍(编辑)的病人的sildenafil管理的反应是否与他们的山峰有关收缩速度(PSV)，外部动脉粥样硬化，心血管的风险因素(RF)或在低心血管的风险的comorbidities。方法：我们与12RF和comorbidities注册了97个病人，独自与动脉的编辑结合了(组A，n=27)，编辑正动脉粥样硬化患者颈动脉动脉(组B，n=23)，编辑正更低的手足动脉畸形(组C，n=25)，并且编辑正颈动脉和更低的手足动脉畸形(组D，n=22)。Sildenafil功效(100mg两次为12个星期的一个星期)也与≥在病人被检验3RF，外部动脉粥样硬化和没有心血管的comorbidities(组E，n=20)。结果：中部的PSV分别地是在组A，B，C，D和E的24.1，21.0，19.3，14.5和17.5cm/s。Sildenafil反应在组A是更高的病人(77.8%)，在组B和C(65.2%和56%)中间、在组最低D(45.4%)和E(50%)，和在后者二组的反应比在另外的三个组显著地低。另外，sildenafil反应否定地旁边被影响：≥3RF，外部动脉粥样硬化和没有全身的comorbidity，或与扩大动脉粥样硬化和comorbidities联系的12RF的存在。comorbidities的数字是断然与动脉粥样硬化本地化或扩展有关(25，35，38和47在组A，B，C和D，分别地)。结论：在有动脉的编辑的病人的低sildenafil功效与扩大动脉粥样硬化被联系。这些病人应该经历广泛的ultrasonography和完整的心血管的考试。

简介：AbstractPurpose:To discuss and share the experience of treatment of traumatic innominate arterial injury.Methods:A retrospective analysis was performed on patients with innominate arterial injuries admitted from January 2016 to July 2018 at the department of vascular surgery, Beijing Jishuitan Hospital, China. All the arterial injuries were confirmed by arteriography. Clinical data including mechanism of injury, type of injury, demographics, concomitant injuries, time interval from trauma to blood flow reconstruction, and operation methods were collected. Follow-up program included outpatient visit and duplex-ultrasonography. SPSS version 23.0 was adopted for data analysis. Categorical variables are presented as number and/or frequency and continuous variables as mean ± standard deviation.Result:Altogether 7 patients were included and 6 (85.7%) were male. The mean age of patients was (29.43 ± 7.98) years, range 19-43 years. Six patients had isolated innominate arterial injuries and the rest 1 combined innominate arterial and vein injuries. The injury causes were road accidents in 3 patients, stab wound in 2, gunshot wound in 1, and crush injury in 1. All the 7 patients presented hemorrhagic shock at admission, which was timely and effectively corrected. No perioperative death or technical complications occurred. Intimal injury (n = 2) and partial transaction (n = 2) of the innominate artery were treated with covered stents. Two patients with complete transection of artery received vascular reconstruction by artificial grafts. One patient with partial transaction received balloon dilation and open surgical repair (hybrid operation). The mean time interval from trauma to blood flow reconstruction was (4.27 ± 0.18) h, range 4.0-4.5 h; while the operation time was (48.57 ± 19.94) min, range 25-75 min. Cerebral infarction occurred in one patient with brain injury due to anticoagulation contraindication. The average follow-up was (13.29 ± 5.65) months, range 6-24 months. No severe stenosis, occlusion, and thrombosis of covered stents or artificial vessels were found by color Doppler ultrasound.Conclusion:Urgent control of hemorrhage and restoration of blood supply are critical for the treatment of traumatic innominate arterial injury. Endovascular therapy is a feasible and effective method with short operation time and less trauma.

简介：DearEditor,Retinalarterialmacroaneurysm(RAM),whichusuallyoccurswithinthefirstthreeordersofarterialbifurcation,isacquiredfusiformorsacculardilatationsofretinalarterioles~([1-2]).Aging,thefemalegender,andsystemicvascularpa-

简介：Thisstudyinvestigatedcharacteristicsofbifurcationandcriticalbucklingloadbyshapeimperfectionofspacetruss,whichweresensitivetoinitialconditions.Thecriticalpointandbucklingloadwerecomputedbytheanalysisoftheeigenvaluesanddeterminantsofthetangentialstiffnessmatrix.Thetwo-free-nodesexampleandstardomewereselectedforthecasestudyinordertoexaminethenodalbucklingandglobalbucklingbythesensitivitytotheeigenbucklingmodeandtheanalysesoftheinfluence,andcharacteristicsoftheparametersasdefinedbytheloadratioofthecenternodeandsurroundingnode,aswellasrise-spanratiowereperformed.Thesensitivitytotheimperfectionoftheinitialshapeofthetwo-free-nodesexample,whichoccursduetosnappingatthecriticalpoint,resultedinbifurcationbeforethelimitpointduetothebucklingmode,andthebucklingloadwasreducedbytheincreaseintheamountofimperfection.Thetwosensitivebucklingpatternsofthenumericalmodelareestablishedbyinvestigatingthedisplacedpositionofthefreenodes,andtheasymmetriceigenmodegreatlyinfluencedthebehavioroftheimperfectionshapewhetheritwasatlimitpointorbifurcation.Furthermore,thesensitivemodeofthetwo-free-nodesexamplewassimilartothein-extensionalbasismechanismofasimplifiedmodel.Thestardome,whichwasusedtoexaminetheinfluenceamongseveralnodes,indicatedthattheinfluenceofnodalbucklingwasgreaterthanthatofglobalbucklingastherise-spanratiowashigher.Besides,globalbucklingisoccurredwithreachingbifurcationpointasthevalueofloadratiowashigher,andthebucklingloadlevelwasabout50%-70%ofloadlevelatlimitpoint.

简介：Varioussteadymodelsforinteractionbetweenheartandarterialsystemhavebeengiveninliter-ature,Inourrecentstudy,adynamicprinciple,i.e.theprincipleofleastcardiacworkisproposed,andady-namicmodelforinteractionofheartandarterialsystemisestablished.Preliminaryresultsofourexperimentsshowthatboththeprincipleandthemodelareconsistentwiththephysiologicalphenomena.Itrevealsthatthepres-entanalysismayofferanewmeasureforthestudyofdynamicprocessofinteractionbetweenheartandarterialsystem.

简介：Rightventricularfailure(RVF)remainstheprimarycauseofdeathinpatientswithpulmonaryarterialhypertension.WereviewthepathophysiologyofRVF,includingtheremodelingandventriculoarterialuncouplingthatoccurswhenthefailingrightsideoftheheartisunabletocompensateforarisingafterload.Secondly,thenoninvasiveimagingtechniquesusedintheassessmentofRVFareexplored,includingechocardiography,cardiacmagneticresonanceimaging,computedtomography,andpositronemissiontomography.Third,wedescribehowtheseimagingtechniquesandapatient’sclinicalcharacteristicsmaybeusedtodetermineprognosis.Lastly,weexplorethemedicalandsurgical/interventionaltreatmentoptionsforRVF.Despitethesetreatmentoptions,morbidityandmortalityremainhighinthispatientpopulation.Thediscoveryofnewprognosticindicators,useofhybridimagingforearlydetectionofRVF,andstrategiestopreventthedevelopmentofRVFwillbeimportantifoutcomesinthispatientpopulationaretoimprove.

简介：Objective:Toanalyzeretrospectivelythesurgicaltreatmentof21casesofinfectedarterialinjuriesofthemajorlimbhospitalizedfrom1989to2003inourdepartment.Methods:Afteraradicaldebridementanddrainage,anautologousvesselbypassreconstruction,simplevesselligationoramputationwerecarriedoutrespectivelyaccordingtoeachpatient'scondition.Inordertomakeabettermilieuforthegrafts,localmusculo-cutaneousflapsweretranslocatedtocoverthewoundsin9cases.Results:1case(4.8%)diedduringthetreatment.5cases(5/21,23.8%)underwentamputations.Bloodsupplyreconstructionwassuccessfulin15cases(15/21,71.4%).93.3%(14/15)ofthecasesweresuccessfulingettinganunobstructedvesselatearlystage.Thrombosisoccurredin1case(1/15,6.7%)andasoundresultwasobtainedafterasecondoperation.Conclusions:Radicaldebridementcombinedwithbypassvesselreconstructionwithautologousveinandwithmusculo-cutaneousflaptranslocationisaneffectivetreatmentforinfectivelimbvascularinjuries.

简介：AbstractTwin reversed arterial perfusion sequence, a severe and unique complication of monochorionic multiple pregnancy, is characterized by vascular anastomosis and abnormal or absent cardiac development in the twins. This article reviewed its pathogenesis, prenatal ultrasound diagnosis, and management. The pump twin’s chances for survival can be maximized by proper management. The optimal timing of the interventions remains a debate, although the latest studies encourage early intervention, i.e., in the first trimester. The most preferred approach is to interrupt the vascular supply to the acardius, such as through ultrasound-guided laser coagulation and radiofrequency ablation of the intrafetal vessels.

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简介：Thispaperconsiderstheoptimaltrafficsignalsettingforanurbanarterialroad.Byintroducingtheconceptsofsynchronizationrateandnon-synchronizationdegree,amathematicalmodelisconstructedandanoptimizationproblemisposed.Then,anewiterativealgorithmisdevelopedtosolvethisoptimaltrafficcontrolsignalsettingproblem.Convergencepropertiesforthisiterativealgorithmareestablished.Finally,anumericalexampleissolvedtoillustratetheeffectivenessofthemethod.

简介：BackgroundPregnancycomplicatingpulmonaryarterialhypertension(PAH)isalife-threateningobstetricalcomplication.FewstudieshavereportedtheclinicalcharacteristicsandoutcomesofpregnantwomenwithPAH.MethodsRetrospectivelyanalysiswasconductedon86casesofpregnantwomenwithPAHattheDepartmentofObstetricinGuangdongGeneralHospitalbetween2009and2014.Dataincludedpatients'age,theetiologiesofPAH,clinicalclassificationoftheNewYorkHeartAssociation(NYHA),gestationalweeks,deliverymode,maternalandfetaloutcomes.Results1Therewere2casesofidiopathicpulmonaryarterialhypertension(IPAH)and84casesofsecondarypulmonaryarterialhypertension.Thelatterwascomposedby40(47.61%)casesofcongenitalheartdisease(CHD),38(45.23%)casesofrheumaticheartdisease(RHD),3(3.57%)casesofsystemiclupuserythematosus(SLE)and1(1.19%)caseofpartialhydatidiformmole.ThenumberofpatientsclassifiedinNYHAI~IVwere8(9.30%),41(47.67%),26(30.23%)and11(12.7%),respectively.Andthemortalitywas3.48%(3/86).2Amongthe86patients,31(36.04%)womengavebirthattermand36(41.86%)hadprematuredelivery.Inaddition,16(18.6%)womenhadanabortionlessthan28weeks.Therewereatotalof65(75.58%)livebirths,61(93.84%)ofwhomweredeliveredviacesareansection,whiletheother4(6.15%)werevaginaldeliveries.3Patientsweredividedinto3groups,12ofmild(<40mmHg),35ofmoderate(40~70mmHg)and39ofsevere(≥70mmHg)regardingthepulmonaryarterysystolicpressure(sPAP)measuredbyultrasound.WedefinedtheformertwoasgroupAandthelatterasgroupB.Thesignificancewasseenstatisticallyingestationalweeks(32.86±8.86gvs28.76±9.84),therateoftransferringtoICU(19.14%vs53.84%),neonatalbirth-weight(2725.69±467.43vs2044.82±665.75g),APGARscoring(9.97±0.16vs8.68±2.08),maternalstatusofheartfunctionandadversepregnantoutcomes,whencomparedgroupAwithB.AlltheP-valuesmentionedabovew

简介：IntroductionInrecent10years,duetofastdevelopingofeconomyinChina,seriouspowershortageoccurs.Thesystemfrequencyoftenfelltoabnormalvaluesinmostnetworks.Forthesecurityofpowersystems,forcedswitchoffoffeedersfromthedistributionsubstationoftenhappendtorecovernormalfrequency.Infact,thespeedofdevelopmentofChinesepowerindustryisveryhighinthisperiod.Theyearlyaverageincreasingrateofgeneratingcapacitywasabout8%.Theyearlynewlyinstalledca-pacitywasmorethan9000MWinrecent4years.Buttheannual

简介：在这份报纸，在年度流量和沉积运输的变化被从10使用长期的观察数据向南向北从远方越过中国在10条大河里计量车站到远方估计了。年度沉积收益通常在过去的一半有一个减少的趋势，这被发现世纪。每区域根据在年度流量和沉积的变化让步，中国的河能被分类进下列三个组：1)有减少的年度沉积运输和稳定的流量的河；2)有减少的年度沉积运输和流量的河并且3)有极大地减少的年度沉积运输和减少的年度流量的河。结果显示那，在所有南部的河里(到包括Huaihe河的Huaihe河的南方)，在平均年度流量有小变化但是在年度沉积运输的戏剧的减少。然而，在北河里，年度沉积收益和流量显示出减小的重要证据。为了进一步在年度流量和沉积调查最近的变化，搬运，来自这10个计量车站在的短期的观察数据最近10年被估计了。结果证明年度沉积运输和流量在过去的10年里在北河里显著地减少了。在Lijin车站把黄河用作一个例子，为最后10年的平均年度流量仅仅是长期的平均价值的1/3和最后10年的平均年度沉积收益仅仅是长期的平均价值的1/4。更不平常地，在Yongding河里，年度沉积收益接近了零，流量显著地减少了。另外，在流量和沉积运输的变化上的人的活动的影响被讨论了。

简介：IntroductionAnalysisandforecastofloadcharacteristicsareimportantaspectsinpowermarketanalysisandprediction.Correctlymasteringgridloadcharacteristics

简介：Fromthegroupmovementofthebedloadwithinthebottomlayer,detailsofthenonlineardynamiccharacteristicsofbedloadmovementarediscussedinthispaper.Whetherthesedimentisinitiatedintomotioncorrespondstowhethertheconstanttermintheequationisequaltozero.Ifconstanttermiszeroandnodispersiveforceisconsidered,theequationrepresentsthetraditionalShieldsinitiationcurve,andifconstanttermiszerowithoutthedispersiveforcebeingconsidered,thenanewShieldscurvewhichismuchlowerthanthetraditionaloneisgot.Thefixedpointoftheequationcorrespondstotheequilibriumsedimenttransportofbedload.Inthemutationanalysis,wehavefoundthattheinflectionpointisthedemarcationpointofbreaking.Intheory,thebreakingpointcorrespondstothedividingboundaryline,acrosswhichthebedformchangesfromflatbedtosandrippleorsanddune.ComparedwiththeexperimentaldataofChatouHydraulicLabinFrance,theconclusionsareverified.

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简介：Asaspecialgeologicalphenomenon,thecharacterofcollapsibleloessfoundationiscollapsiblewhenpenetratedbywater.Thischaracterleadstothesoillosingloadbearingcapacitylargelyandmayleadtofoundationfailure.Pileisapopularfoundationusedincollapsibleloess.Thesqueezedbranchandplatepileisanewtypeofpiledevelopedinrecentyearsandhasnotbeusedinaprojectbefore.Inthispaperthreesqueezedbranchandplatepilesaretestedincollapsibleloessafterimmersionprocessing.Theresultsmaybeusedforreferenceinsimilarconstructionproject,andtoprovidetheoreticalreferencesforde-signingofthesqueezedbranchandplatepilesinengineeringpractice.

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简介：Thecoolingandheatingloaddistributionoflargeareaair-conditionedroomsuchas'open'offices,shoppingmallsandwaitingroomsisusuallyassumedtobeeveninairconditioningsystemdesign.However,itisnotthecaseinreality,andalowefficientairconditioningsystemresultsfromthisassumption.AsimulationandanalysisofthecoolingloaddistributionofanofficebuildinginHongKongwithTRANSYSsoftwareisprovidedinthispaper.Atypicalofficeisdividedinto13zonesforsimulation,includingexternalzone,medialzoneandinternalzoneinthenorth,thesouth,theeastandthewestrespectivelyandacentralzone,insteadof4directionalzone.Theresultshowsthereismuchcoolingloaddifferencebetweeneachzone,andmoreattentionshouldbepaidtounevenindoorcoolingandheatingloaddistributiontofurtherguidethedesign.

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