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简介：在新加坡的许多城市，在交通繁忙和横穿街道不安全的地方，人们随处可见人行天桥。人行天桥可以使人们很安全地穿过街道，它的用途就如同街面上的斑马线。

简介：1981年世界卫生组织估计全世界大约160万的盲人是由于外伤所致,而外伤也造成了230万人双眼[1]低视力和1900万人的单眼盲或低视力。眼外伤是指眼球及其附属器官受到外来的物理性或化学性因素损害,造成眼部组织器质性及功能性损害。由于眼的位置暴露,眼外伤很常见。据统计,我国每年会有数百万到上千万的人发生眼部外伤,伤者后果严重,是目前青壮年及少年儿童单眼失明的主要原因之一。

简介：BoartandferriescanhardlybefoundintheNujiangRiver,the“riveroffury.”Tocrosstheriverpeoplehavetowalkacrosssuspensionbridgesthrownacrossit.Inplaceswithoutasuspensionbridge,you'vegottoslidetotheoppositebankalonganoverheadcable,bothhandsholdingtightapulleyofbambooormetal,whilethestormyriverroarsbelow.Forstrangerslikeme,tocrosstheriverthiswayisquitethrillingbutcanalsobefrightening.Giventhedifficultterrain,Ibelieve,overheadcablesacrosstheturbulentrivertestifytothewisdomandcourageofthelocalpeople.

简介：Thenasogastrictube(NGT)hasbecomeafrequentlyuseddevicetoalleviategastrointestinalsymptoms.Nasogastrictubesyndrome(NTS)isanuncommonbutpotentiallylife-threateningcomplicationofanindwellingNGT.NTSischaracterizedbyacuteupperairwayobstructionduetobilateralvocalcordparalysis.Wereportacaseofa76-year-oldmanwithNTS,inducedbyanindwellinglongintestinaltube.Hewasadmittedtoourhospitalfortreatmentofsigmoidcoloncancer.Heunderwentsigmoidectomytoreleaseabowelobstruction,andhadalongintestinaltubeinsertedtodecompresstheintestinaltract.Hepresentedacutedyspneafollowingprolongedintestinalintubation,andbronchoscopyshowedbilateralvocalcordparalysis.TheNGTwasremovedimmediately,andtracheotomywasperformed.Thepatientwasfinallydischargedinafullyrecoveredstate.NTSbeconsideredinpatientscomplainingofacuteupperairwayobstruction,notonlywithaNGTinsertedbutalsowithalongintestinaltube.

简介：Thispaperpresentsfuzzy-baseddesignforthecontrolofoverheadcrane.Insteadofanalyzingthecomplexnonlinearcranesystem,theproposedapproachusessimplebuteffectivewaytocontrolthecrane.Therearetwinfuzzycontrollerswhichdealwiththefeedbackinformation,thepositionoftrolleycraneandtheswingangleofload,tosuppresstheswayandacceleratethespeedwhenthecranetransportstheheavyload.Thisapproachsimplifiesthedesigningprocedureofcranecontroller;besides,thetwincontrollermethodreducestherulenumberwhenfulfillingthefuzzysystem.Finally,experimentalresultsthroughthecranemodeldemonstratetheeffectivenessofthescheme.

简介：IntroductionThedevelopmentofacompositeoverheadgroundwirewithopticalfiber(OPGW)bytheShanghaiElectricCableResearchInsti-tutionisoneofthemajortaskssetupfortheSeventhFiveYearPlan.ThefeasibilitystudiesofthestructureanddesignofOPGWwasfinishedin1985.In1986,thesampleofOPGW60/80waspreparedandthetypetestswereconducted.Theevaluationofthesamplein

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简介：一、概述宽带接入、宽带移动和高清视频业务的迅猛增长，对传送网的容量提出了越来越高的要求，据OpticalExfo统计，美国的容量需求每两年增长一倍，而在中国，预计容量需求每年增长50％-80％。另外运营商网络融合和全业务运营的需求，对光传送网功能和性能提出了更高的要求，光传送网将朝着多业务接入、资源快速灵活配置、超高速率、超大容量、高生存性、智能化、低成本等方向发展。

简介：Aftercarefulinvestigationsandrepeateddiscussions,cadressenttosupportTibetfromFujianprovincehaveworkedoutaplantoaidTibetinthecomingthreeyear.

简介：1.IntroductionConductorgallopinghascausedmoreandmoredisturbancestothesecureoperationofpowersystemfrom1930untilnow.Al-thoughmanyauthorshavebeenstudyingitstheoryandpreventivemeasuresbywind-tunnelandfieldmodellingtestsandgettingsome

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简介：SincethefoundingofNewChinain1949,accordingtotheConstitutionofthePeople’sRepublicofChina,thecentralgovernmenthasmadeitabasicstatepolicytohelpethnicminorities-inhabitedborderareaswiththeirpolitical,economicandculturaldevelopment,andtoleadalltheethnicgroupsofChinaontotheroadtocommonprosperity.

简介：ＥＣＯＮＯＭＩＣＳＵＰＰＯＲＴＰＯＬＩＣＹＩＮＧＥＲＭＡＮＹｂｙＳｏｎｇＣｈｅｎｇｙｕＡｔｔｈｅｉｎｖｉｔａｔｉｏｎｏｆｔｈｅＩｎｓｔｉｔｕｔｅｏｆＩｎｔｅｒｎａｔｉｏｎａｌＶｏｃａｔｉｏｎａｌＴｒａｉｎｉｎｇＣｏｏｐｅｒａｔｉｏｎａｔｔｈｅＮｏｒｄ...

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简介：ＲｅｆｏｒｍｉｎＯｌｄＡｇｅＳｕｐｐｏｒｔＣｈｉｎａｉｓｐｒｅｓｅｎｔｌｙｕｎｄｅｒｇｏｉｎｇａｄｒａｓｔｉｃｔｒａｎｓｉｔｉｏｎｆｒｏｍａｔｒａｄｉｔｉｏｎａｌｔｏｍｏｄｅｒｎｓｏｃｉｅｔｙｉｎｗｈｉｃｈｌａｒｇｅｆａｍｉｌｉｅｓａｒｅｇｒａｄ?..

简介：AbstractAs an innovative in vitro culture model, organoids have been established by cell sorting and subsequent culture in three-dimensional culture systems. Organoids can be derived from induced pluripotent stem cells or organ-restricted adult stem cells. Compared with traditional two-dimensional cell culture models and patient-derived xenograft models, organoids possess long-term genetic stability and can better retain the characteristics of source tissues or organs. These advantages have led to the increased use of ovarian and fallopian tube organoids in various fields of research, including cell differentiation and development, establishment of disease occurrence and progression models, tissue regeneration and reconstruction, individual drug screening, immune cell co-culture, and maternal-fetal medicine. This review briefly summarizes the recent progress in the application of ovarian and fallopian tube organoids in the field of obstetrics and gynecology.

简介：AbstractCilia are microtubule-based filamentous organelles that play a vital role in embryogenesis. Multiple signal transduction pathways are orchestrated by cilia, such as Hedgehog and planar cell polarity signals. Various studies, spanning over last 2 decades, have emphasized the role of cilia-mediated signaling cascades in regulating neural tube patterning and development. Moreover, the deficiency of certain ciliary genes have been reported to cause neural tube defects (NTDs), which are a set of disorders that occur due to perturbation of normal neural tube closure. However, the mechanisms underlying cilia dysfunction resulting NTDs remain unclear. Recent studies have highlighted the association of phosphoinositide signaling with cilia, thereby conferring novel insights into the function of cilia during neural tube development. Here, we have reviewed recent studies on cilia, focusing on the molecular mechanism underlying the involvement of cilia in neural tube development and the role of ciliary disruption in the development of NTDs.

简介：Thechaotictransientsofacurvedfluidconveyingtubesubjectedtoanonlinearfoundationareinvestigated.TheassumptionoftheinextensibilityofthetubeisappliedtoderivethenonlineardifferentialequationofmotionviatheNewtonianapproach,withthedifferentialquadraturemethodusedtodiscretizethecurvedtubemodelinthespatialdomain.Andthenonlineardynamicmotionequationisobtained.Thenumericalanalysisshowsthat,thefinalsteadystatesaresensitivetotheinitialsystemconditionsinalargeparameterregionofthefluidspeed.Thisphenomenonofchaotictransientsisinfrequentforfluidconveyingtubes.