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Current progress of research on heat -resistant Mg alloys: A review

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International Journal of Minerals,Metallurgy and Materials 2024年第6期31卷 1406-1425页

作者： Hong Yang Wenlong Xie Jiangfeng Song Zhihua Dong yuyang gao Bin Jiang Fusheng Pan National Engineering Research Center for Magnesium Alloys Chongqing UniversityChongqing 400044China College of Materials Science and Engineering Chongqing UniversityChongqing 400044China

With the increasing attention received by lightweight metals,numerous essential fields have increased requirements for mag-nesium(Mg)alloys with good room-temperature and high-temperature mechanical ***,the high-temperature mechanic-al properties of commonly used commercial Mg alloys,such as AZ91D,deteriorate considerably with increasing *** the past several decades,extensive efforts have been devoted to developing heat-resistant Mg *** approaches either inhibit the gen-eration of thermally unstable phases or promote the formation of thermally stable precipitates/phases in matrices through solid solution or precipitation *** this review,numerous studies are systematically introduced and *** alloy systems,includ-ing those based on Mg–Al,Mg–Zn,and Mg–rare earth,are carefully classified and compared to reveal their mechanical properties and strengthening *** emphasis,limitations,and future prospects of these heat-resistant Mg alloys are also pointed out and dis-cussed to develop heat-resistant Mg alloys and broaden their potential application areas in the future.

关键词： magnesium alloys mechanical properties heat resistance microstructures high temperatures strengthening mechanisms

Optimization on microstructure,mechanical properties and damping capacities of duplex structured Mg–8Li–4Zn–1Mn alloys

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International Journal of Minerals,Metallurgy and Materials 2023年第5期30卷 949-958页

作者： Tongtong Cao Yong Zhu yuyang gao Yan Yang Gang Zhou Xiaofei Cui Chen Wen Bin Jiang Xiaodong Peng Fusheng Pan National Engineering Research Center for Magnesium Alloys Chongqing UniversityChongqing 400044China International Joint Laboratory for Light Alloys(MOE) College of Materials Science and EngineeringChongqing UniversityChongqing 400044China Beijing Spacecrafts Beijing 100090China

Optimizing the mechanical properties and damping capacity of the duplex-structured Mg–Li–Zn–Mn alloy by tailoring the microstructure via hot extrusion was *** results show that the Mg–8Li–4Zn–1Mn alloy is mainly composed ofα-Mg,β-Li,Mg–Li–Zn and Mn *** microstructure of the test alloy is refined owing to dynamic recrystallization(DRX)during hot *** hot extrusion,the crushed precipitates are uniformly distributed in the test *** yield strength(YS),ultimate tensile strength(UTS),and elongation(EL)of as-extruded alloy reach 156 MPa,208 MPa,and 32.3%,respectively,which are much better than that of as-cast ***,the as-extruded and as-cast alloys both exhibit superior damping capacities,with the damping capacity(Q^(-1))of 0.030 and 0.033 at the strain amplitude of 2×10^(-3),*** mechanical properties of the test alloy can be significantly improved by hot extrusion,whereas the damping capacities have no noticeable change,which indicates that the duplex-structured Mg–Li alloys with appropriate mechanical properties and damping properties can be obtained by alloying and hot extrusion.

关键词： magnesium–lithium alloys hot extrusion microstructure mechanical properties damping capacity

National Perinatal Prevalence of Selected Major Birth Defects--China,2010−2018

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China CDC weekly 2020年第37期2卷 711-717页

作者： Wenli Xu Changfei Deng Wenyan Li Ke Wang Jing Tao yuyang gao Xiaohong Li Yanping Wang Juan Liang Jun Zhu Hanmin Liu Li Dai National Center for Birth Defects Monitoring West China Second University HospitalSichuan UniversityChengduSichuanChina Key Laboratory of Birth Defects and Related Diseases of Women and Children(Sichuan University) Ministry of EducationChengduSichuanChina Medical Big Data Center Sichuan UniversityChengduSichuanChina.

Introduction:An estimated of 900,000 infants are born with birth defects each year in China causing a substantial disease *** study aimed to depict the epidemiological patterns of selected major birth defects in Chinese perinatal births and provide important baseline data for future ***:Data from the Chinese Birth Defects Monitoring Network(CBDMN)during 2010–2018 were used to analyze the epidemiological pattern in the prevalence of 15 major birth defects and the trends over ***:In the period of 2010–2018,the top 10 most frequently-occurring birth defects in China included congenital heart diseases(CHDs),polydactyly,cleft lip with or without palate(CL/P),club foot,syndactyly,hydrocephalus,hypospadias,limb reduction defects(LRD),anotia/microtia,and anorectal atresia/*** was a decrease in the prevalence of neural tube defects,CL/P,hydrocephalus,LRD,gastroschisis,and omphalocele,but there were increases in the prevalence of CHDs,cleft palate,hypospadias,club foot,polydactyly,and *** prevalence of most birth defects varied significantly by maternal age,area types(urban/rural),and geographic *** and Implications for Public Health Practice:The findings indicated that the comprehensive prevention of birth defects should focus on these selected birth defects,elderly pregnant women,rural areas,and western regions.

关键词： prevention defects birth

大型国际会议的跨平台网络与音视频融合会议系统

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电视技术 2022年第1期46卷 129-135页

作者：高玉阳云南广播电视台云南昆明650000

以某次线上线下相结合的大型高级别国际会议为例,介绍全球实时网络视频会议的解决方案及技术支撑系统。该系统将全球数百个远程会议客户端与主会场相连,实现了会议发言人、普通参会者、同传翻译等人员之间的信息互通,为疫情形势下级别... 详细信息

以某次线上线下相结合的大型高级别国际会议为例,介绍全球实时网络视频会议的解决方案及技术支撑系统。该系统将全球数百个远程会议客户端与主会场相连,实现了会议发言人、普通参会者、同传翻译等人员之间的信息互通,为疫情形势下级别高、范围广、接入点多、议程复杂的远程会议提供了一种解决方案,也是一套广播电视技术与网络音视频技术融合的典型样本。

关键词：会议控制系统线上线下结合融合系统

Low-modal-crosstalk doped-fiber amplifiers in few-mode-fiber-based systems

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Photonics Research 2024年第8期12卷 1768-1775页

作者： SHUAILUO HUANG LEI SHEN GANG QIAO YUANPENG DING yuyang gao JIAN CUI BAOLONG ZHU SIYUAN LIU MINGQING ZUO JINGLONG ZHU LEI ZHANG JIE LUO YONGQI HE ZHANGYUAN CHEN JUHAO LI State Key Laboratory of Advanced Optical Communication Systems and Networks Peking UniversityBeijing 100871China State Key Laboratory of Optical Fiber and Cable Manufacture Technology Yangtze Optical Fibre and Cable Joint Stock Limited CompanyWuhan 430073China School of Computer and Communication Engineering University of Science and Technology BeijingBeijing 100083China Department of Networks China Mobile Communications Group Co.Ltd.Beijing 100033China Department of Fundamental Network Technology China Mobile Research InstituteBeijing 100053China Pengcheng Laboratory Shenzhen 518055China

Independent light propagation through one or multiple modes is commonly considered as a basic demand for mode manipulation in few-mode fiber(FMF)-or multimode fiber(MMF)-based optical systems such as transmission links,optical fiber lasers,or distributed optical fiber ***,the insertion of doped-fiber amplifiers always kills the entire effort by inducing significant modal *** this paper,we propose the design of doped-fiber amplifiers in FMF-based systems adopting identical multiple-ring-core(MRC)index profiles for both passive and doped fibers to achieve low modal *** develop the direct-glass-transition(DGT)modified chemical vapor deposition(MCVD)processing for precise fabrication of few-mode erbium-doped fibers(FM-EDFs)with MRC profiles of both refractive index and erbium-ion doping ***,a few-mode erbium-doped-fiber amplifier(FM-EDFA)with a maximum gain of 26.08 dB and differential modal gain(DMG)of 2.3 dB is realized based on fabricated FM-EDF matched with a transmission FMF supporting four linearly polarized(LP)*** the insertion of the FM-EDFA,60+60 km simultaneous LP_(01)∕LP_(11)∕LP_(21)∕LP_(02)transmission without inter-modal multiple-input multiple-output digital signal processing(MIMO-DSP)is successfully *** proposed design of low-modal-crosstalk doped-fiber amplifiers provides,to our knowledge,new insights into mode manipulation methods in various applications.

关键词： fiber crosstalk amplifiers

COP15大会线上线下网络会议及公共信号系统详述

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电视技术 2021年第11期45卷 57-62页

作者：高玉阳云南广播电视台云南昆明650000

COP15大会是一场对技术要求极高的会议,它是全球范围的双向多方网络实时会议,具有复杂的公共信号采编播需求,同时主办方、承办方等多方牵头的运作方式也加大了会议的技术难度。这些需求背后是一套庞大、复杂的网络、电视、通信等专业系... 详细信息

COP15大会是一场对技术要求极高的会议,它是全球范围的双向多方网络实时会议,具有复杂的公共信号采编播需求,同时主办方、承办方等多方牵头的运作方式也加大了会议的技术难度。这些需求背后是一套庞大、复杂的网络、电视、通信等专业系统支撑群。基于此,详述支撑COP15大会的各个技术系统,阐述不同系统之间如何串联协调工作。

关键词：大型会议信号系统会控系统线上线下会议

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若羌县地下水埋深动态驱动因素分析

吉林水利 2020年第11期 60-62页

作者：高宇阳新疆昌源水务科学研究院(有限公司) 新疆乌鲁木齐830000

地下水因具有开发利用便捷、水质优良等特点被广泛应用。作为水循环的组成部分,其动态与环境联系密切,影响区域地下水动态变化的因素来源于各个方面,其研究方法也多种多样。为探寻若羌县地下水埋深动态变化及影响因素,根据研究区域2014-... 详细信息

地下水因具有开发利用便捷、水质优良等特点被广泛应用。作为水循环的组成部分,其动态与环境联系密切,影响区域地下水动态变化的因素来源于各个方面,其研究方法也多种多样。为探寻若羌县地下水埋深动态变化及影响因素,根据研究区域2014-2016年地下水埋深变幅的基础资料,利用灰色关联度分析法,计算该研究区地下水埋深动态驱动因素的关联程度,按地表水供水量、地下水供水量、灌溉面积依次减小,表明水资源的调控直接影响地下水埋深动态变化。

关键词：地下水变化驱动因素灰色关联度若羌县

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医院信息管理中互联互通的应用策略

信息与电脑 2018年第2期30卷 161-163页

作者：高雨阳徐州市儿童医院江苏徐州221000

随着信息技术的普及,其被应用到各个领域中。信息技术在医院管理中的运用,形成了信息化的医院管理体系。笔者通过对医院信息管理现状进行分析,总结出其中存在着缺乏专业管理人才、操作流程烦琐、管理机制不健全等问题。同时阐述了互联... 详细信息

随着信息技术的普及,其被应用到各个领域中。信息技术在医院管理中的运用,形成了信息化的医院管理体系。笔者通过对医院信息管理现状进行分析,总结出其中存在着缺乏专业管理人才、操作流程烦琐、管理机制不健全等问题。同时阐述了互联互通在医院信息管理中的重要性,进而提出了医院信息管理中互联互通的方法,从增强管理系统连接、实现信息资源共享、培养专业管理人才、优化信息系统操作流程等方面展开论述,旨在加强医院各部门之间的联系,提高医院信息管理的运作效率,形成高效化的管理模式。

关键词：医院信息管理互联互通

Processing Modflow在地下水位预测中的应用

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吉林水利 2021年第5期 12-15页

作者：高宇阳新疆昌源水务科学研究院有限公司新疆乌鲁木齐830000

数值模拟软件逐渐成为预测地下水演化更普遍的工具,并且广泛应用于地下水动态变化研究。以乌苏市平原区为例,结合区域水文地质条件及钻井资料,利用Processing Modflow建立三维水流数值模拟模型,并对该模型进行平面流场拟合,验证出模拟... 详细信息

数值模拟软件逐渐成为预测地下水演化更普遍的工具,并且广泛应用于地下水动态变化研究。以乌苏市平原区为例,结合区域水文地质条件及钻井资料,利用Processing Modflow建立三维水流数值模拟模型,并对该模型进行平面流场拟合,验证出模拟值基本符合2018年实测地下水位,通过模型模拟2018-2027年不同条件地下水位变化趋势,结果显示,2027年现状条件下比用水总量条件下浅埋深面积减少了550km^(2)。

关键词：乌苏市地下水位预测数值模拟 Processing Modflow