检索结果-南通市图书馆

Construction of bio-functional Mg/HA composite layered coating for orthopedic application

Science China(Technological Sciences) 2021年第11期64卷 2541-2550页

作者： wan peng YAN XuDong LI Mei ZHAO MingChun ZHANG Yu YANG Ke School of Materials Science and Engineering Dongguan University of TechnologyDongguan 523808China Institute of Metal Research Chinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering Central South UniversityChangsha 410083China Research Center of Medical Sciences Guangdong Provincial People s HospitalGuangdong Academy of Medical SciencesGuangzhou 510080China

Magnesium was considered as a revolutionary biodegradable implant material for orthopedic application. Concerning the weakness of intrinsic strength and corrosion behavior, a novel strategy of Mg/metal hybrid system was proposed for extension of orthopedic application, especially at load-bearing site. In this work, an Mg and HA composite layered coating was constructed on titanium by means of chemical conversion and vapor deposition. The HA transition interlayer was introduced to enhance the bonding between Mg film and Ti substrate. Compared with the bare Mg coating, the Mg/HA coating presented good interface bonding, which avoided the occurrence of Mg film peeling off from the substrate. The Mg/HA coating showed a uniform degradation and kept integrity after immersion of 14 d. The Mg ions release by degradation played a crucial role in osteopromotion and antibacterial effect. Incubation of MC3T3-E1 osteoblasts with the Mg/HA coating showed significant promotion on osteogenic differentiation according to ALP activity and Alizarin Red staining assays. Meanwhile the degradation of Mg exhibited strong suppression of bacteria proliferation. It was believed that this novel Mg/HA composite layered coating could be potentially applied in further development of bio-functional hybrid orthopedic implants.

关键词： magnesium HA composite layered coating titanium orthopedic bio-function

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

High-performance self-powered ultraviolet photodetector in SnO_(2)microwire/p-GaN heterojunction using graphene as charge collection medium

引用

Journal of Materials Science & Technology 2023年第7期138卷 183-192页

作者： Tong Xu Mingming Jiang peng wan Yang Liu Caixia Kan Daning Shi College of physics MIIT Key Laboratory of Aerospace Information Materials and PhysicsKey Laboratory for Intelligent Nano Materials and DevicesNanjing University of Aeronautics and AstronauticsNanjing 211106China

Graphene monolayer has been extensively applied as a transparency electrode material in photoelectronic devices due to its high transmittance,high carrier mobility,and ultrafast carrier *** this study,a high-performance self-powered photodetector,which is made of a SnO_(2)microwire,p-type GaN film,and monolayer graphene transparent electrode,was proposed and *** detector is sensitive to ultraviolet light signals and illustrates pronounced detection performances,including a peak respon-sivity∼223.7 mA W^(-1),a detectivity∼6.9×10^(12)Jones,fast response speed(rising/decaying times∼18/580μs),and excellent external quantum efficiency∼77%at 360 nm light illumination without exter-nal power *** with the pristine SnO_(2)/GaN photodetector using ITO electrode,the device performances of responsivity and detectivity are significantly increased over 6×10^(3)%and 3×10^(3)%,*** performance-enhanced characteristics are mainly attributed to the high-quality het-erointerface of n-SnO_(2)/p-GaN,the highly conductive capacity,and the unique transparency of graphene ***,the built-in potential formed at the SnO_(2)/GaN heterojunction interface could be strengthened by the Schottky potential barrier derived from the graphene electrode and SnO_(2)wire,en-hancing the carrier collection efficiency through graphene as a charge collection *** work is of great importance and significance to developing excellent-performance ultraviolet photodetectors for photovoltaic and optoelectronic applications in a self-powered operation manner.

关键词： Self-powered photodetector SnO_(2)microwires Monolayer graphene electrode Heterojunction Schottky barrier

来源：

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

基于临床和超声特征的术前诊断肝内胆管癌列线图的构建与评估

引用

中华肝胆外科杂志 2024年第5期30卷 354-359页

作者：刘春蕊薛海燕刘晗万鹏姚静孔文韬周正扬南京大学医学院附属鼓楼医院超声医学科南京210008 南京航空航天大学计算机科学与技术学院南京210016 南京大学医学院附属鼓楼医院医学影像科南京210008

目的建立和评估基于临床和超声特征的诊断肝内胆管癌的列线图。方法回顾性分析2016年1月至2022年8月南京大学医学院附属鼓楼医院因肝占位性病变拟行肝切除术的723例肝癌患者资料。最终入组399例患者,其中男性284例,女性115例,年龄(60.5... 详细信息

目的建立和评估基于临床和超声特征的诊断肝内胆管癌的列线图。方法回顾性分析2016年1月至2022年8月南京大学医学院附属鼓楼医院因肝占位性病变拟行肝切除术的723例肝癌患者资料。最终入组399例患者,其中男性284例,女性115例,年龄(60.5±10.5)岁。399例患者中肝细胞癌198例、肝内胆管癌201例。399例患者通过计算机产生随机数的方法以7∶3随机分为训练集(n=279)和测试集(n=120)。单因素和多因素logistic回归分析肝内胆管癌的影响因素,根据多因素logistic回归分析结果,使用R软件建立术前诊断肝内胆管癌的列线图。采用受试者工作特征(ROC)曲线、校准曲线评估列线图诊断肝内胆管癌的能力。决策曲线分析模型给患者带来的净收益。结果多因素logistic回归分析示病灶形状不规则、胆管扩张、女性、肝硬化、糖类抗原242>10 U/ml、糖类抗原125>30 U/ml和甲胎蛋白>10μg/L是肝内胆管癌的影响因素(均P<0.05)。基于上述因素构建列线图。列线图在训练集和测试集诊断肝内胆管癌的ROC曲线下面积分别是0.966、0.956,校准曲线显示该模型的预测效果与实际情况的一致性良好。决策曲线分析显示在多数合理阈值概率,列线图比所有患者都诊断为肝细胞癌或肝内胆管癌更有效,即可以获得净获益。结论基于临床和超声特征构建的术前诊断肝内胆管癌列线图诊断效果良好。

关键词：胆管上皮癌癌,肝细胞列线图超声

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

基于临床、常规超声及超声造影的列线图术前鉴别肝细胞癌和肝内胆管癌

引用

中华超声影像学杂志 2024年第5期33卷 369-377页

作者：刘春蕊薛海燕刘晗万鹏孔文韬周正扬姚静南京大学医学院附属鼓楼医院超声医学科南京210008 南京航空航天大学计算机科学与技术学院南京210016 南京大学医学院附属鼓楼医院医学影像科南京210008

目的建立和验证基于临床及超声影像特征的列线图术前鉴别肝细胞癌(HCC)和肝内胆管癌(ICC)。方法回顾性分析2016年1月至2023年12月南京大学医学院附属鼓楼医院因肝占位入院的462例患者的临床和超声资料,包括HCC 262例(56.7%),ICC 200例(4... 详细信息

目的建立和验证基于临床及超声影像特征的列线图术前鉴别肝细胞癌(HCC)和肝内胆管癌(ICC)。方法回顾性分析2016年1月至2023年12月南京大学医学院附属鼓楼医院因肝占位入院的462例患者的临床和超声资料,包括HCC 262例(56.7%),ICC 200例(43.3%)。按7∶3比例随机分为训练集(n=324)和验证集(n=138)。单因素分析初步筛选训练集中HCC组与ICC组两组间差异有统计学意义的变量,行LASSO回归选取系数较高的变量,纳入Logistic回归,分析预测病理为ICC的独立危险因素。R软件绘制基于上述危险因素的列线图。采用ROC曲线、校准曲线评估列线图鉴别ICC的能力,决策曲线(DCA)分析模型给患者带来的净收益。结果单因素分析示训练集ICC组与HCC组中年龄、性别、肝硬化、HBsAg(+)、ALP>185 U/L、CA19-9>27 kU/L、CA242>10 kU/L、形状(不规则)、边界、胆管扩张、门静脉癌栓、动脉期增强方式、廓清时间27 kU/L、CA242>10 kU/L、形状(不规则)、胆管扩张、廓清时间<60 s、瘤内静脉、动脉期增强方式是预测ICC的独立危险因素(均P<0.05)。基于以上危险因素建立的列线图在训练集和验证集的ROC曲线下面积分别为0.963和0.914。训练集中该模型的特异度、敏感度分别为0.926、0.917,验证集中分别为0.875、0.871。校准曲线示模型的预测效果与实际情况的符合度良好。DCA曲线显示在多数合理阈值概率可以获得净收益。结论基于临床、常规超声及超声造影特征的列线图对术前鉴别ICC具有较好的预测价值,可为临床提供有价值的诊断依据。

关键词：超声造影超声检查肝内胆管癌肝细胞癌列线图鉴别诊断

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Microcrystal modulated exciton-polariton emissions from single ZnO@ZnO:Ga microwire

引用

Photonics Research 2020年第2期8卷 175-185页

作者： wanGQI MAO MINGMING JIANG JIAOLONG JI peng wan XIANGBO ZHOU CAIXIA KAN College of Science Nanjing University of Aeronautics and AstronauticsNanjing 210016China Key Laboratory for Intelligent Nano Materials and Devices(MOE) Nanjing University of Aeronautics and AstronauticsNanjing 210016China

Due to their outstanding surface-to-volume ratio,highly smooth surface,and well-defined crystal boundary,semiconducting micro-/nanocrystals have been used as a pivotal platform to fabricate multifunctional optoelectronic devices,such as superresolution imaging devices,solar concentrators,photodetectors,light-emitting diodes(LEDs),and *** particular,micro-/nanocrystals as key elements can be employed to tailor the fundamental optical and electronic transport properties of integrated hetero-/***,ZnO micro crystal-decorated pre-synthesized Ga-doped ZnO microwire(ZnO@ZnO:Ga MW)was *** single ZnO@ZnO:Ga MW can be used to construct optically pumped Fabry-Perot(F-P)mode microlasers,with the dominating lasing peaks centered in the violet spectral *** exciton-po lari ton emissions from single ZnO@ZnO:Ga MW-based heterojunction diode can also be *** deposited ZnO microcrystals can facilitate the strong coupling of F-P optical modes with excitons,leading to the formation of exciton-polariton features in the ZnO@ZnO:Ga ***,the waveguiding lighting behavior and energy-band alignment of ZnO microcrystal-sheathed ZnO:Ga MW radial structures should be extremely attractive for potential applications in semiconducting microstructure-based optoelectronic devices,such as micro-LEDs,laser microcavities,waveguides,and photodetectors.

关键词： optoelectronic pumped heterojunction

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Bifunctional ultraviolet light-emitting/detecting device based on a SnO_(2) microwire/p-GaN heterojunction

引用

Photonics Research 2021年第12期9卷 2475-2485页

作者： TONG XU MINGMING JIANG peng wan KAI TANG DANING SHI CAIXIA KAN College of Science MIIT Key Laboratory of Aerospace Information Materials and PhysicsKey Laboratory for Intelligent Nano Materials and DevicesNanjing University of Aeronautics and AstronauticsNanjing 211106China

SnO_(2)has attracted considerable attention due to its wide bandgap,large exciton binding energy,and outstanding electrical and optoelectronic *** to the lack of reliable and reproducible p-type SnO_(2),many challenges on developing SnO_(2)-based optoelectronic devices and their practical applications still ***,single-crystal SnO_(2)microwires(MWs)are acquired via the self-catalyzed *** a strategic alternative,n-SnO_(2)MW/p-GaN heterojunction was constructed,which exhibited selectable dual-functionalities of light-emitting and photodetection when operated by applying an appropriate *** device illustrated a distinct near-ultraviolet light-emission peaking at∼395.0 nm and a linewidth∼50 ***,the device characteristics,in terms of the main peak positions and linewidth,are nearly invariant as functions of various injection current,suggesting that quantum-confined Stark effect is essentially ***,the identical n-SnO_(2)MW/p-GaN heterojunction can also achieve photovoltaic-type light *** device can steadily feature ultraviolet photodetecting ability,including the ultraviolet/visible rejection ratio(R_(360 nm)/R_(400 nm))∼1.5×10^(3),high photodark current ratio of 105,fast response speed of 9.2/51 ms,maximum responsivity of 1.5 A/W,and detectivity of 1.3×10^(13)Jones under 360 nm light at−3 V ***,the bifunctional device not only displays distinct near-ultraviolet light emission,but also has the ability of high-sensitive ultraviolet *** novel design of n-SnO_(2)MW/p-GaN heterojunction bifunctional systems is expected to open doors to practical application of SnO_(2)microstructures/nanostructures for large-scale device miniaturization,integration and multifunction in next-generation high-performance photoelectronic devices.

关键词： heterojunction optoelectronic ultraviolet

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

工业工程方法在DB空调外机装配线平衡分析与改善中的应用

引用

桂林航天工业学院学报 2024年第3期29卷 377-384页

作者：万鹏崔忆真马艺轩青岛理工大学管理工程学院山东青岛266520

针对DB空调外机生产过程中AB段装配线产能不足、负荷不均衡的问题,通过对工时的测定,以装配线平衡率、装配线平衡损失率等评价指标为具体参数,使用流程分析和ECRS等工业工程方法对其进行优化改善,有效解决了装配过程中不平衡的问题。在... 详细信息

针对DB空调外机生产过程中AB段装配线产能不足、负荷不均衡的问题,通过对工时的测定,以装配线平衡率、装配线平衡损失率等评价指标为具体参数,使用流程分析和ECRS等工业工程方法对其进行优化改善,有效解决了装配过程中不平衡的问题。在工序作业人员从11人减少到10人的同时,单班产能从681台上升到764台,效率提升了12.2%,装配线平衡率由78.6%上升至88.6%,作业瓶颈工时由37 s下降到33 s,装配线的平滑性指数由9.3降低到5.1。该方法很好地实现了合理分工,平衡装配线各工序的操作负荷、提高生产能力的目标。

关键词：装配线平衡瓶颈工序流程分析

来源：

维普期刊数据库

同方期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

High-mobility induced high-performance self-powered ultraviolet photodetector based on single ZnO microwire/PEDOT:PSS heterojunction via slight ga-doping

引用

Journal of Materials Science & Technology 2021年第34期93卷 33-40页

作者： peng wan Mingming Jiang Tong Xu Yang Liu Caixia Kan College of Science MIIT Key Laboratory of Aerospace Information Materials and PhysicsKey Laboratory for Intelligent Nano Materials and DevicesNanjing University of Aeronautics and AstronauticsNo.29 Jiangjun RoadNanjing 211106P.R.China

Semiconductor micro/nanostructures with broad bandgap can provide powerful candidates for fabricating ultraviolet photodetectors(PDs)due to their proper bandgap,unique optoelectronic properties,large surface-to-volume ratio and good ***,semiconducting micro/nanostructures suffer from low electron conductivity and abundant surface defects,which greatly limits their practical application in developing *** this work,an ultraviolet PD consisting of single Ga-doped ZnO microwire(ZnO:Ga MW)and p-type poly(3,4 ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS)was *** exposed to ultraviolet illumination,the PD exhibits excellent performance(responsivity~185 m A/W,detectivity~2.4×10^(11) Jones,and fast response speed of~212μs for rise time and~387μs for decay time)under self-driven *** with that of an undoped Zn O MWbased PD,the responsivity and detectivity of ZnO:Ga MW/PEDOT:PSS PD are significantly enhanced over 400%and 600%,*** to the incorporation of Ga element,the charge transport properties of a ZnO:Ga MW,specifically for the mobility,are effectively enhanced,which can substantially facilitate the generation,separation,transport and harvest efficiency of photo-generated carriers in the asfabricated ***,the Ga-incorporation improves the crystalline quality of MWs and reduces surface state density,further suggesting a high-quality ZnO:Ga MW/PEDOT:PSS *** work provides a potential approach for designing high-performance self-powered ultraviolet PDs from the aspect of enhancing carrier transport through fine doping.

关键词： UV Photodetectors Self-powered Mobility High performance Microwire

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

双尾鳍船舶纵倾节能及其尺度效应的数值研究

引用

舰船科学技术 2024年第3期46卷 56-61页

作者：张正阳李子如万鹏程秦江涛高性能船舶技术教育部重点实验室(武汉理工大学) 湖北武汉430063 武汉理工大学船海与能源动力工程学院湖北武汉430063 中国舰船研究设计中心湖北武汉430064

纵倾节能是一种高效易行的船舶节能手段,针对纵倾节能应用,采用基于RANS求解的数值模拟方法,对不同缩尺比与纵倾角度工况下的双尾鳍内河船型绕流场进行了数值模拟。本文分析纵倾角度对阻力及其成分的影响规律;分析阻力随纵倾角度变化规... 详细信息

纵倾节能是一种高效易行的船舶节能手段,针对纵倾节能应用,采用基于RANS求解的数值模拟方法,对不同缩尺比与纵倾角度工况下的双尾鳍内河船型绕流场进行了数值模拟。本文分析纵倾角度对阻力及其成分的影响规律;分析阻力随纵倾角度变化规律的原因并对纵倾节能相关的尺度效应进行探讨。结果表明,双尾鳍船舶以设计航速航行时,纵倾角度为首倾1.5°左右时阻力最小,且纵倾节能存在明显的尺度效应。

关键词：双尾鳍纵倾优化数值模拟重叠网格尺度效应

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

基于盲源分离的抗主瓣干扰技术研究

引用

价值工程 2024年第10期43卷 124-126页

作者：方茜万鹏陆金磊中国卫星海上测控部江阴214431

当干扰从雷达天线主瓣进入,对目标回波信号影响极大,常见的窄脉冲剔除等抗主瓣干扰手段能力有限,必然会影响雷达跟踪检测目标。本文针对伴随式主瓣干扰,以盲源分离算法为切入点,理论分析其信号模型,结合阵列雷达分阵可重构特性,多维度... 详细信息

当干扰从雷达天线主瓣进入,对目标回波信号影响极大,常见的窄脉冲剔除等抗主瓣干扰手段能力有限,必然会影响雷达跟踪检测目标。本文针对伴随式主瓣干扰,以盲源分离算法为切入点,理论分析其信号模型,结合阵列雷达分阵可重构特性,多维度仿真验证干扰抑制效果。结果表明:盲源分离能有效抑制主瓣干扰,提升雷达探测性能,丰富抗干扰手段。

关键词：盲源分离主瓣干扰 JADE算法阵列雷达分阵可重构

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：