简介:讲座了超导中连续Josephson结系统解的渐近行为,利用先验估计证明了当时间趋于无穷时解收敛于对应稳态问题的解。
简介:Josephsonjunctionarraychipsformicrovoltapplicationshavebeendesignedandfabricated.Avoltagestepassmallas1μVhasbeenobservedforasinglejunctioninthearraywhenitisdrivenby483.59MHzmicrowave.Byselectingdifferentpartsofthearray,itcanoutputavoltagefrom1μVto256μV.Theflatregionofthevoltagestepsisover200μA.Thiskindofarrayisusefulforpotentialmicrovoltapplications.
简介:WetheoreticallyinvestigatetheenergybandstructureandJosephsondynamicsofaspin-orbitcoupledBose–Einsteincondensateinadouble-wellpotential.WestudytheenergybandstructureandthecorrespondingtunnelingdynamicsofthesystembyproperlyadjustingtheSOcoupling,Ramancoupling,Zeemanfieldandatomicinteractions.ThecoupledeffectsofSOcoupling,Ramancoupling,Zeemanfieldandatomicinteractionsleadtotheappearanceofcomplexenergybandstructureincludingtheloopstructure.Particularly,theemergenceoftheloopstructureinenergybandalsodependsonSOcoupling,Ramancoupling,Zeemanfieldandatomicinteractions.Correspondingly,theJosephsondynamicsofthesystemarestronglyrelatedtotheenergybandstructure.Especially,theemergenceoftheloopstructureresultsincomplextunnelingdynamics,includingsuppression-revivaltransitionsandself-trappingofatomstransferbetweentwospinstatesandtwowells.Thisengineeringprovidesapossiblemeansforstudyingenergylevelandcorrespondingdynamicsoftwo-speciesSOcoupledBECs.
简介:[摘要]:结直肠癌是最常见的消化道恶性肿瘤之一,对我国居民健康造成了严重危害。我们提出了一种改进的YOLOv3算法--Efficient-YOLOv3,结果表明,EfficientYOL0v3 模型检测结直肠息肉的mAP为93.04%。与基准的Yolov3模型相比提高了8%以上,与基准的Yolov4模型相比提高了3%以上。
简介:摘要吻合口漏始终是困扰结直肠外科医生的一个顽疾,技术和设备的进步并未降低其发生率。随着循证医学的发展,越来越多的吻合口漏高危因素被发现。如何高效而系统地组合利用这些孤立的风险因子并量化之,给临床提供科学的吻合口漏风险预警,从而帮助术者制定围手术期预防策略,对降低术后吻合口漏的发生率有重要意义。目前,结直肠吻合口漏的预测模型大体可以分为预后型模型(术前和术中用于预测吻合口漏发生的风险)和诊断型模型(早期预警,辅助提高吻合口漏早期诊断率)两类。针对结直肠吻合口漏的防治策略主要有控制基础疾病和纠正贫血及低蛋白血症、选择合适的手术时间窗、重视和改进吻合技术(包括选择合适的吻合器型号)等,但预防性肠造口仍然是目前最主要的防治措施。如何降低预防性造口的并发症率,如何降低预防性造口的永久化率都是当前临床需要探讨的重要问题。
简介:ThispapershowsthattheJosephsoncouplingenergyandthezero-pointenergyhaveindeliblerulesonthesuperfluiddensityandthesuperconductivityinthehigh-Tccuprates.ThispaperalsoshowsthatthevaluesofTcatunderdopedandoverdopedregionsaredeterminedbythedamageconditionsofthephasecoherenceintheclassicalandthequantumXY-models,respectively.