检索结果-南通市图书馆

3D image system improves the learning curve and contributes to medical education of rhinoplasty

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Plastic and Reconstructive Surgery 2024年第2期6卷 72-75页

作者： chen cheng Caiyue Liu Jiafei Yang Yingfan Zhang Department of Plastic and Reconstructive Surgery Shanghai Ninth People’s HospitalShanghai Jiao Tong University School of MedicineShanghai 200011China

Background: Rhinoplasty is a complex surgical procedure that requires critical analysis and precise design before surgery, making it a challenging operation for both the surgical team and medical educators. This study aimed to evaluate the impact of 3D design involvement on learning curves and to establish a more effective method for rhinoplasty ***: Surgeons who participated in an educational program were divided into two groups. The experimental group was involved in the 3D design before the operation, and the control group was asked to review the rhinoplasty atlas. A self-assessment questionnaire was used to evaluate the learning curve of the eight rhinoplasty procedures for each surgeon, and the overall satisfaction rate data were also ***: The self-assessment scores in both groups showed an increasing trend from the first to the eighth operation. The mean scores of the experimental group were significantly higher than those of the control group at the fifth operation(P=0.01). The satisfaction rate of the experimental group(91.7%) was higher than that of the control group(54.5%).Conclusion: The 3D imaging system can improve the learning curve and satisfaction rate of rhinoplasty education,proving that it is an easy and effective tool for medical education.

关键词： Rhinoplasty Learning curve Medical education 3D design

Bright InP quantum dots by Ga-doping for red emitters

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第7期17卷 6721-6733页

作者： Kai-Zheng Song Xiao-Hang He Zhe-Yong chen Ge Tang Jin-Zhao huang Feng-Lei Jiang College of Chemistry and Molecular Sciences Wuhan UniversityWuhan 430072China

Environment-friendly indium phosphide(InP)-based quantum dots(QDs)with efficient red-emitting properties are sufficiently needed to satisfy the requirement of burgeoning display and lighting ***,the syntheses of InP QDs using tris(trimethylsilyl)phosphine as the precursor are highly toxic and ***,we successfully introduced gallium(Ga)ions into tris(dimethylamino)phosphine-based red InP cores through thermally-promoted cation exchange,and the obtained Ga-doped InP cores exhibited significantly increased photoluminescence quantum yields(PLQY)of up to 26%.The existence of Ga was directly confirmed by energy-dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy,and the functions of Ga were systematically *** subsequent coating of Ga-doped InP cores with ZnSeS and ZnS shells,the resulting Ga-InP/ZnSeS/ZnS QDs achieved a high PLQY of 62%with an emission maximum at 640 *** contrast,without Ga-doping,the PLQY only attained 36%using the same synthetic *** indicated an approximate 1.7-fold increase in *** enhancement of photoluminescence was related to the Ga^(3+),as it not only passivated surface defects of InP cores but also reduced core–shell interface *** Ga-InP/ZnSeS/ZnS QDs exhibited good stability towards heat treatment and ultraviolet(UV)***,the red light-emitting diode(LED)based on Ga-InP/ZnSeS/ZnS QDs performed well in a wide injected current range of 2 to 200 mA,with a maximum power efficiency of 0.68 lm/*** work showcases Ga-doping through cation exchange as a promising strategy for enhancing the efficiency of InP-based red emitters.

关键词： indium phosphide gallium doping optical properties light emitting diode

45CrNiMoVA高强度合金钢氢致断裂有限元模拟与试验研究分析

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

热加工工艺 2024年第2期53卷 90-96页

作者：李云龙陈波张克实广西大学土木建筑工程学院防灾与结构安全重点实验室广西防灾与工程安全重点实验室广西南宁530004 桂林航天工业学院能源与建筑环境学院广西桂林541004

运用ABAQUS有限元软件建立二维CT试样氢扩散和内聚力分析耦合模型,基于氢脆机制理论,采用梯形内聚力本构模型,通过临界氢在裂纹尖端引起氢附着率的变化和与之相关内聚力强度之间的降解耦合关系,模拟了45CrNiMoVA高强度钢CT试样氢致裂纹... 详细信息

运用ABAQUS有限元软件建立二维CT试样氢扩散和内聚力分析耦合模型,基于氢脆机制理论,采用梯形内聚力本构模型,通过临界氢在裂纹尖端引起氢附着率的变化和与之相关内聚力强度之间的降解耦合关系,模拟了45CrNiMoVA高强度钢CT试样氢致裂纹萌生和断裂。结果显示:金属中的氢原子在静水应力梯度的驱动下富集在高静水应力区域。随扩散时间的增加,氢原子在裂纹尖端富集降低了材料的断裂能从而降低了内聚力强度,使内聚力单元在较低的应力下发生失效,引起材料氢致损伤断裂。模拟得到充氢试样的载荷-位移曲线与实验曲线的大体相同,这说明该模型可在不需要大量试验的条件下对高强度钢氢致断裂进行数值模拟,模拟结果可为该类钢材氢脆断裂失效分析提供借鉴。

关键词： 45CrNiMoVA高强度合金钢氢脆 CT试样内聚力模型氢降低键合力

Pit density reduction for AlN epilayers grown by molecular beam epitaxy using Al modulation method

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2024年第10期33卷 95-101页

作者： huan Liu Peng-Fei Shao Song-Lin chen Tao Tao Yu Yan Zi-Li Xie Bin Liu Dun-Jun chen Hai Lu Rong Zhang Ke Wang Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials School of Electronic Science and EngineeringNanjing UniversityNanjing 210093China Hefei National Laboratory Hefei 230088China Xiamen University Xiamen 361005China

We have investigated homoepitaxy of AlN films grown by molecular beam epitaxy on AlN/sapphire templates byadopting both the continuous growth method and the Al modulation epitaxy(AME)growth *** continuous growthmethod encounters significant challenges in controlling the growth *** the precise Al/N=1.0 ratio is difficult toachieve,either the excessive Al-rich or N-rich growth mode *** contrast,by adopting the AME growth method,sucha difficulty has been effectively *** manipulating the supply time of the Al and nitrogen sources,we were able toproduce AlN films with much improved surface *** first step of the AME method,only supplying Al atoms,is important to wet the surface and the Al adatoms can act as a *** of the initial Al supply time caneffectively reduce the pit density on the grown AlN *** pits density dropped from 12 pits/μm^(2)to 1 pit/μm^(2)andthe surface roughness reduced from 0.72 nm to 0.3 nm in a 2×2μm^(2)area for the AME AlN film homoepitaxially grownon an AlN template.

关键词： Al modulation epitaxy molecular beam epitaxy AlN pits

时间是物理法则的表现形式:虚拟世界中的时间

在线全文

学校读者我要写书评

暂无评论

基于激光毛化的不锈钢与GFRP单面单点电阻焊接工艺及性能研究

中国科技纵横 2024年第9期 55-57页

作者：杨华陈俭深圳市企企通科技有限公司广东深圳 518000

本文探讨了时间在虚拟世界中的本质和作用,将时间视为物理法则的表现形式,而非传统观念中的独立维度.基于OpenAI的Sora生成视频,提出了一种基于物理规律而非固定时间步长的虚拟环境构建方法.通过实验验证了这种方法在提高模拟精度和一... 详细信息

本文探讨了时间在虚拟世界中的本质和作用,将时间视为物理法则的表现形式,而非传统观念中的独立维度.基于OpenAI的Sora生成视频,提出了一种基于物理规律而非固定时间步长的虚拟环境构建方法.通过实验验证了这种方法在提高模拟精度和一致性方面的有效性,并通过基于物理规律的虚拟世界构建应用案例,展示了其在现实世界中的应用潜力.最后,本文对未来研究方向提出相关建议,强调了跨领域应用和多尺度模拟的重要性.

关键词：时间本质虚拟世界数字孪生时间步长 Sora视频

来源：博看期刊评论

在线全文

博看期刊

学校读者我要写书评

暂无评论

中国激光 2024年第16期51卷 1-11页

作者：檀财旺王世嘉苏健晖韩晓辉陈波宋晓国哈尔滨工业大学(威海)材料科学与工程学院山东特种焊接技术重点实验室山东威海264209 哈尔滨工业大学先进焊接与连接国家重点实验室黑龙江哈尔滨150001 中车青岛四方机车车辆股份有限公司山东青岛266111

不锈钢与玻璃纤维增强树脂基复合材料(GFRP)的异质材料复合结构在汽车轻量化领域有着广阔的应用前景。采用激光毛化技术在不锈钢表面制备网格微织构,开展了微织构的引入对不锈钢与GFRP单面单点电阻连接界面的强化机理研究。研究结果表明... 详细信息

不锈钢与玻璃纤维增强树脂基复合材料(GFRP)的异质材料复合结构在汽车轻量化领域有着广阔的应用前景。采用激光毛化技术在不锈钢表面制备网格微织构,开展了微织构的引入对不锈钢与GFRP单面单点电阻连接界面的强化机理研究。研究结果表明:表面微织构的引入显著改善了不锈钢表面的润湿性,熔化的GFRP在不锈钢表面由不润湿性转变为润湿性;随着微织构间距的增大,接触角先减小后增大,当微织构间距为0.2 mm时,接触角达到最小值62.4°,此时表面微织构的引入对界面机械嵌合的促进效果最佳;此外,微织构的引入促进了界面化学扩散,使得接头拉剪力达到最大值3548 N,界面失效形式由界面断裂转变为界面断裂与内聚断裂混合的失效形式。

关键词：激光技术纳秒激光微织构单面单点电阻焊润湿性机械嵌合

干扰素诱导跨膜蛋白基因多态性与HBV感染程度的关联

在线全文

学校读者我要写书评

暂无评论

中华医院感染学杂志 2024年第12期34卷 1784-1788页

作者：王博文王强黄严春章革民陈华朱雄林武汉市新洲区人民医院感染内科湖北武汉430400 武汉市金银潭医院感染内科湖北武汉430048

目的探究干扰素诱导跨膜蛋白(IFITM)基因多态性与乙型肝炎病毒(HBV)感染程度的关系.方法选择2017年1月-2021年1月武汉市新洲区人民医院收治的104例HBV感染患者为研究组,按照HBV感染损伤肝功能的程度将患者分为A组(Child-Pugh A级,n=31)... 详细信息

目的探究干扰素诱导跨膜蛋白(IFITM)基因多态性与乙型肝炎病毒(HBV)感染程度的关系.方法选择2017年1月-2021年1月武汉市新洲区人民医院收治的104例HBV感染患者为研究组,按照HBV感染损伤肝功能的程度将患者分为A组(Child-Pugh A级,n=31)、B组(Child-Pugh B级,n=30)和C组(Child-Pugh C级,n=43),选择同一时间段内于医院进行体检的90名健康体检者为对照组;采用直接测序法检测IFITM基因多态性,并采用Logistic回归分析IFITM3基因多态性与HBV感染程度的关联.结果研究组IFITM3基因rs12252位点CC基因型、C等位基因频率高于对照组(P<0.05);不同HBV感染程度患者IFITM3基因rs12252位点CC基因型、C等位基因频率比较,差异有统计学意义(P<0.05);Logistic回归分析结果显示,IF-ITM3基因rs12252位点加性模式中携带CC基因型者HBV重度感染风险是携带TT基因型者的3.600倍(P<0.05),rs12252位点隐性模式中携带CC基因型者HBV重度感染风险是携带TT+TC基因型者的3.527倍(P<0.05);IFITM3基因rs12252位点CC基因型是HBV感染程度的危险因素(P<0.05).结论IFITM3基因rs12252位点多态性与HBV感染程度相关,CC基因型可能增加重度HBV感染风险.

关键词：干扰素诱导跨膜蛋白基因多态性乙型肝炎病毒感染程度关联性

在线全文

学校读者我要写书评

暂无评论

韭菜收获机圆盘切割装置设计与试验

中国农机化学报 2024年第2期45卷 79-83,100页

作者：许斌星陈永生管春松於锋陈华农业农村部南京农业机械化研究所南京市210014 江苏省农机具开发应用中心南京市210017 南通富来威农业装备有限公司江苏南通226009

针对现有韭菜收割机作业时出现的不完整、漏割等问题,结合韭菜的物理特性,设计一种兼具扶禾、切割、收集组合式韭菜收集机械。对关键部件圆盘刀进行结构参数、运动参数的确定,开展切割理论分析;利用MATLAB软件,选取机具作业速度分别为0.... 详细信息

针对现有韭菜收割机作业时出现的不完整、漏割等问题,结合韭菜的物理特性,设计一种兼具扶禾、切割、收集组合式韭菜收集机械。对关键部件圆盘刀进行结构参数、运动参数的确定,开展切割理论分析;利用MATLAB软件,选取机具作业速度分别为0.2 m/s、0.3 m/s、0.4 m/s、0.5 m/s,对切割圆盘进行运动仿真,得到不同作业速度下的切割区域变化规律;以机具的作业速度为试验因素,以割台损失率、漏割损失率为指标,进行单因素试验,确定机具作业速度范围。结果表明,当韭菜收获机圆盘刀转速为3000 r/min时,作业速度为0.4 m/s,韭菜切割收获装置性能最优,此时韭菜割台损失率均值为2.8%、漏割损失率均值为2.2%。

关键词：韭菜圆盘切割运动仿真收获机械

维普期刊数据库博看期刊

Transformer in reinforcement learning for decision-making:a survey

在线全文

学校读者我要写书评

暂无评论

Frontiers of Information Technology & Electronic Engineering 2024年第6期25卷 763-790页

作者： Weilin YUAN Jiaxing chen Shaofei chen Dawei FENG Zhenzhen HU Peng LI Weiwei ZHAO College of Information and Communication National University of Defense TechnologyWuhan 430014China College of Intelligence Science and Technology National University of Defense TechnologyChangsha 410072China Laboratory for Parallel and Distributed Processing National University of Defense TechnologyChangsha 410072China

Reinforcement learning(RL)has become a dominant decision-making paradigm and has achieved notable success in many real-world ***,deep neural networks play a crucial role in unlocking RL’s potential in large-scale decision-making *** by current major success of Transformer in natural language processing and computer vision,numerous bottlenecks have been overcome by combining Transformer with RL for *** paper presents a multiangle systematic survey of various Transformer-based RL(TransRL)models applied in decision-making tasks,including basic models,advanced algorithms,representative implementation instances,typical applications,and known *** work aims to provide insights into problems that inherently arise with the current RL approaches,and examines how we can address them with better TransRL *** our knowledge,we are the first to present a comprehensive review of the recent Transformer research developments in RL for *** hope that this survey provides a comprehensive review of TransRL models and inspires the RL community in its pursuit of future *** keep track of the rapid TransRL developments in the decision-making domains,we summarize the latest papers and their open-source implementations at https://***/williamyuanv0/Transformer-in-Reinforcement-Learning-for-Decision-Making-A-Survey.

关键词： Transformer Reinforcement learning(RL) Decision-making(DM) Deep neural network(DNN) Multi-agent reinforcement learning(MARL) Meta-reinforcement learning(Meta-RL)