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Design and Realization of InP/AlGaInAs MultipleQuantum Well Ring Laser

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Transactions of Tianjin University 2014年第6期20卷 402-406页

作者： Xie Sheng Guo Jing Guan Kun Mao Luhong Guo weilian Qi Lifang Li Xianjie School of Electronic In formation Engineering Tianjin UniversityTianjin 300072China The 13th Research Institute of China Electronic Technology Group Corporation Shijiazhuang 050051China

Using beam propagation method （BPM）, key optical design parameters of InP/AlGaInAs multiple quantumwell （MQW） ring laser were numerically analyzed. The influences of waveguide dimensions, curvature radiusand gap size on the coupling efficiency were discussed. An InP/AlGaInAs MQW ring laser with radius of 350 μm wasdesigned and realized. The experimental results show that the designed device, lasing at 1 563.2 nm with side modesuppression ratio higher than 20 dB, exhibited unidirectional bistability between the clockwise and counterclockwisemodes.

关键词： semiconductor laser multiple quantum well optical bistability AlGaInAs

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育龄期宫颈癌患者生育管理的最佳证据总结

中华现代护理杂志 2024年第4期30卷 446-452页

作者：沈斐从维莲王春兰方群英闫鼎鼎浙江中医药大学护理学院杭州310053 浙江省肿瘤医院乳腺肿瘤外科杭州310022 浙江省肿瘤医院妇科肿瘤放疗科杭州310022

目的检索、评价并总结育龄期宫颈癌患者生育管理的相关证据, 为临床医护人员对宫颈癌患者进行生育管理提供依据。方法系统检索UpToDate、Cochrane Library、BMJ Best Practice、中国指南网、中国知网、万方医学网、中国生物医学文献数... 详细信息

目的检索、评价并总结育龄期宫颈癌患者生育管理的相关证据, 为临床医护人员对宫颈癌患者进行生育管理提供依据。方法系统检索UpToDate、Cochrane Library、BMJ Best Practice、中国指南网、中国知网、万方医学网、中国生物医学文献数据库、维普网等国内外循证医学数据库、临床决策系统、指南网站、相关专业协会网站、医学文献服务网站和数据库中与宫颈癌患者生育相关的证据, 包括临床决策、指南、证据总结、专家共识、系统评价。检索时限为建库至2023年3月1日。由2名系统学习过循证护理知识的研究者独立进行文献筛选和质量评价, 对符合要求的文献与临床专家共同讨论后完成证据提取、总结。结果共纳入11篇文献, 其中临床决策3篇, 指南4篇, 专家共识3篇, 系统评价1篇。总结的最佳证据包括生育评估与安全、生育力保存方法、生育保留手术方式及抗肿瘤治疗、生育时机、妊娠期管理与复查和妊娠合并宫颈癌的特殊处理6个方面共30条最佳证据。结论通过总结育龄期宫颈癌患者生育管理相关证据, 为临床医护人员对宫颈癌患者进行生育指导提供依据。临床应用时, 应充分考虑患者意愿、病情等因素, 提供个体化的治疗方案, 使患者利益最大化。

关键词：宫颈肿瘤生育管理证据总结循证护理

DOPS形成性评价在血管超声技能教学中的应用

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中国高等医学教育 2024年第7期 53-55页

作者：谢秀静鲁玉婷冯卫连姜健蒋天安浙江大学医学院附属第一医院浙江杭州310003

目的:评估操作技能直接观察评估(direct observation of procedural skills,DOPS)在血管超声技能教学中的效果。方法:选取浙江大学医学院附属第一医院超声医学2019级-2021级住培医师40名为对象。结果:三年级DOPS试验组成绩高于三年级传... 详细信息

目的:评估操作技能直接观察评估(direct observation of procedural skills,DOPS)在血管超声技能教学中的效果。方法:选取浙江大学医学院附属第一医院超声医学2019级-2021级住培医师40名为对象。结果:三年级DOPS试验组成绩高于三年级传统对照组(P=0.048),三年级传统对照组成绩与二年级DOPS试验组差异没有统计意义(P=0.512)。结论:应用DOPS可显著提升住培医师血管超声的技能操作能力和学习效率,值得进一步研究并在住院医师规范化培训中应用。

关键词：操作技能直接观察评估形成性评价血管超声住院医师规范化培训

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超声引导下鼻肠管置管术在重症患者中的应用

中外医疗 2024年第1期43卷 58-61页

作者：钟楚扬曾维莲方华茹林韩晓吴敏揭阳市人民医院ICU 广东揭阳522000

目的探讨超声引导下鼻肠管置管术在重症患者中的应用。方法随机选取2021年7月—2023年7月揭阳市人民医院收治的60例重症患者为研究对象,根据随机数表法分为对照组和研究组,各30例,对照组应用传统盲插法,研究组应用超声引导下鼻肠管置... 详细信息

目的探讨超声引导下鼻肠管置管术在重症患者中的应用。方法随机选取2021年7月—2023年7月揭阳市人民医院收治的60例重症患者为研究对象,根据随机数表法分为对照组和研究组,各30例,对照组应用传统盲插法,研究组应用超声引导下鼻肠管置管术治疗。比较两组置管成功率、成功置管时间,并发症以及两组生命监测指标。结果研究组置管成功率较对照组高,差异有统计学意义(P0.05)。置管后,研究组心率、呼吸频率、平均动脉压优于对照组,差异有统计学意义(P均<0.05)。结论超声引导下鼻肠管置管术应用于重症患者中能够减少并发症的发生,提高置管成功率的同时,缩短置管时间。

关键词：超声引导鼻肠管置管术重症患者

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大型施工机械监管系统智能视频分析模型研究

铁路计算机应用 2024年第4期33卷 23-29页

作者：郑相波姚国栋史方圆廖炜炼马清志上海东华地方铁路开发有限公司上海200040 上海上铁互联信息技术有限公司上海200040 苏州大学计算机科学与技术学院苏州215031

为在铁路工程中加强对铁路大型施工机械的安全管理,帮助建设管理单位实现对施工现场大型施工机械的整体掌控,设计了大型施工机械监管系统,介绍了其总体架构,并重点阐述了其中智能视频分析模型的设计。该模型基于YOLOv6模型,结合迁移学... 详细信息

为在铁路工程中加强对铁路大型施工机械的安全管理,帮助建设管理单位实现对施工现场大型施工机械的整体掌控,设计了大型施工机械监管系统,介绍了其总体架构,并重点阐述了其中智能视频分析模型的设计。该模型基于YOLOv6模型,结合迁移学习、不平衡学习、数据增强等多种深度学习技术,实现铁路大型施工机械的快速定位与分类。模型的宏平均准确率可达94.0%、mAP可达0.956、每秒检测帧数可达84,准确性和实时性均满足实际应用需求。

关键词：大型施工机械目标检测施工监管安全预警视频分析

AlGaInAs multi-quantum wells ring laser with optical coupling waveguides

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Chinese Science Bulletin 2009年第20期54卷 3716-3719页

作者： LI XianJie QI LiFang GUO weilian YU JinLong ZHAO YongLin CAI DaoMin YIN ShunZheng MAO LuHong 13th Institute of China Electronic Technology Group Corporation Shijiazhuang 050051 China School of Electronic Information Engineering Tianjin University Tianjin 300072 China

Based on InAlGaAs multi-quantum wells epitaxy structure for Fabry-Pero laser diode,a multi-quantum wells semiconductor ring laser is realized using ICP dry etching process and polyimide planarization *** laser is generated in a semiconductor resonator ring and is output by two coupled integrated bus *** ring diameter is 700 μm and the width of the waveguide is 3 μ*** output optical power-current(P-I) characteristic and the wavelength spectra of the ring laser are measured using a fiber coupled to the cleaved facet of the bus *** threshold current of the device is 120 mA and the wavelength is 1602 nm at an injected current of 160 *** addition,the operation mode for the laser in the resonator ring is roughly discussed based on the P-I characteristic plot.

关键词：波导激光器多量子阱量子阱半导体激光器耦合环光学输出电流耦合波导激光波长

An improved social force model (ISFM)-based crowd evacuation simulation method in virtual reality with a subway fire as a case study

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International Journal of Digital Earth 2023年第1期16卷 1186-1204页

作者： Jinbin Zhang Jun Zhu Pei Dang Jianlin Wu Yuxuan Zhou weilian Li Lin Fu Yukun Guo Jigang You Faculty of Geosciences and Environmental Engineering Southwest Jiaotong UniversityChengduPeople’s Republic of China Institute of Geodesy and Geoinformation University of BonnBonnGermany School of Engineering and Geomatics Southwest Petroleum UniversityChengduPeople’s Republic of China

Crowd evacuation simulation using virtual reality(VR)is significant for digital emergency response ***,existing evacuation simulation studies suffer from poor adaptation to complex environments,inefficient evacuations,and poor simulation effects and do not fully consider the impacts of specific disaster environments on crowd *** more realistically express the crowd evacuation results obtained under the influence offire environments and the subjective consciousness of pedestrians in subway stations,we designed a dynamic pedestrian evacuation path planning method under multiple constraints,analysed the influences of an‘environmental role’and a‘subjective initiative’on crowd evacuation,established an improved social force model(ISFM)-based crowd evacuation simulation method in VR,developed a prototype system and conducted experimental *** experimental results show that the crowd evacuation time of the ISFM is affected by the disaster *** simulation experiments without disaster scenarios,the improved model’s crowd evacuation efficiency improved by averages of 12.53%and 15.37%over the commercial Pathfinder software and the original social force model,*** method described herein can effectively support real-time VR crowd evacuation simulation under multiexit and multifloor conditions and can provide technical support for emergency evacuation learning and management decision analyses involving subwayfires.

关键词： Subway stationfire improved social force model crowd evacuation simulation virtual reality path planning

A novel lambda negative-resistance transistor in the 0.5 μm standard CMOS process

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Chinese Science Bulletin 2012年第7期57卷 716-718页

作者： Yan Chen LuHong Mao weilian Guo Xin Yu ShiLin Zhang Sheng Xie School of Electronic Information Engineering Tianjin University Tianjin China

A novel negative-resistance transistor (NRT) with a Lambda shaped I-V characteristic is demonstrated in the 0.5 μm standard CMOS process. To save on the number of component devices, this device does not use standard device models provided by CMOS processes, but changes a MOSFET and a BJT into a single device by fabricating them in the same n-well, with a p-type base layer as the MOSFET's substrate. The NRT has a low valley current of -6.82 nA and a very high peak-to-valley current ratio of 3591. The peak current of the device is -24.49 μA which is low enough to reduce the power consumption of the deivce, and the average value of its negative resistance is about 32 kΩ. Unlike most negative-resistance devices which have been fabricated on compound semiconductor substrates in recent years, this novel NRT is based on a silicon substrate, compatible with mainstream CMOS technology. Our NRT dramatically reduces the number of devices, minimizing the area of the chip, has a low power consumption and thus a further reduction in cost.

关键词： CMOS工艺负阻晶体管 lambda 使用标准 MOSFET 设备型号化合物半导体 CMOS技术

PERMANENCE AND GLOBAL ATTRACTIVITY OF N-SPECIES COOPERATION SYSTEM WITH DISCRETE TIME DELAYS AND FEEDBACK CONTROLS

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Annals of Differential Equations 2007年第1期23卷 18-25页

作者： He weilian College of Basic Medicine Fujian Medical University Fuzhou 350004

In this paper, we consider the N-species cooperation system with discrete time delays and feedback controls. By using the differential inequality theory and constructing a suitable Lyapunov functional, we obtain suffi... 详细信息

关键词： cooperation system permanence global attractivity discrete delays feedback controls