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Recent advances in autonomous synthesis of materials

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ChemPhysMater 2022年第2期1卷 77-85页

作者： Yucen Li Lingling Xia Yiming Fan qinyue wang Ming Hu School of Physics and Electronic Science East China Normal UniversityShanghai 200241China

The synthesis of materials has been an important task throughout human history,and the ability to perform successful and efficient syntheses has been a factor in industrial revolutions and societal ***,the rapid development of sophisticated techniques such as flow synthesis methods,artificial intelligence,infor-mation technology,and robotics,has facilitated the autonomous synthesis of chemicals with minimal effort and at little cost to the *** trend has influenced recent materials research and could potentially reduce the time from discovery of materials to their *** this short review,we focus on the autonomous synthesis of *** first discuss how autonomous synthesis could change materials ***,we provide some examples of autonomous syntheses in flow ***,we present examples of autonomous syntheses using non-flow methods.

关键词： Autonomous synthesis Machine learning Flow chemistry Quantum dots Metal-organic frameworks Perovskite

Digital Twins for Engineering Asset Management:Synthesis,Analytical Framework,and Future Directions

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Engineering 2024年第10期41卷 261-275页

作者： Yongkui Li qinyue wang Xiyu Pan Jian Zuo Jinying Xu Yilong Han School of Economics and Management Tongji UniversityShanghai 200092China School of Civil and Environmental Engineering Georgia Institute of TechnologyAtlantaGA 30332USA School of Architecture and Civil Engineering The University of AdelaideAdelaideSA 5005Australia Department of Engineering University of CambridgeCambridge CB30FAUK

Effective engineering asset management(EAM)is critical to economic development and improving livability in society,but its complexity often impedes optimal asset *** twins(DTs)could revolutionize the EAM paradigm by bidirectionally linking the physical and digital worlds in real *** is great industrial and academic interest in DTs for ***,previous review studies have predominately focused on technical aspects using limited life-cycle perspectives,failing to holistically synthesize DTs for EAM from the managerial point of *** on a systematic literature review,we introduce an analytical framework for describing DTs for EAM,which encompasses three levels:DT 1.0 for technical EAM,DT 2.0 for technical-human EAM,and DT 3.0 for technical-environmental *** this framework,we identify what is known,what is unknown,and future directions at each *** 1.0 addresses issues of asset quality,progress,and cost management,generating technical *** lacks multi-objective self-adaptive EAM,however,and suffers from high application *** is imperative to enable closed-loop EAM in order to provide various functional services with affordable DT *** 2.0 accommodates issues of human-machine symbiosis,safety,and flexibility management,generating managerial value beyond the technical performance improvement of engineering ***,DT 2.0 currently lacks the automation and security of human-machine interactions and the managerial value related to humans is not prominent *** research needs to align technical and managerial value with highly automated and secure DT *** 3.0 covers issues of participatory governance,organization management,sustainable development,and resilience enhancement,generating macro social *** it suffers from organizational fragmentation and can only address limited social governance *** research opportunities exist to coordinate different ***,future research

关键词： Engineering asset management Digital twin Socio-technical theory Structureprocessoutcome Literature review

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飞秒激光技术与相关学科

中国激光 1994年第5期21卷 418-420页

作者：王清月天津大学精仪系超快激光室天津300072

本文阐述了超快激光发展的四个阶段及其内容、特点。对当前超快激光的研究特点、发展方向进行了综述。对与飞秒激光技术相关的几个新兴学科,如飞秒激光物理学、飞秒激光化学、飞秒光孤子通讯和飞秒电子学给予概括评述。

关键词：飞秒激光超快激光光通信

QUARK-ABNORMAL NEUTRON STARS

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Science in China,Ser.A 1983年第6期 650-656页

作者：曲钦岳汪珍如赵家炳 Deportment of Astronomy Nanjing University

By using the equation of the state given by Freedman and MeLerran for quark state and that given by us for abnormal neutron state with abnormal protonsts, we have explored the models of stars with interior in quark state and outlayer in abnormal neutron state, and arrived at the conclusion that there possibly exist stable quark-abnormal neutron stars.

关键词： QUARK-ABNORMAL NEUTRON STARS

Thermochromatium tepidum外周捕光天线蛋白LH2在脂质体及表面活性剂胶束中的光谱性质

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高等学校化学学报 2016年第9期37卷 1678-1685页

作者：霍一林石莹王秦玥李萝园于龙江王鹏张建平王征宇中国人民大学化学系北京100872 茨城大学理学部冈山大学自然科学学院

采用动态光散射、透射电子显微镜、紫外-可见吸收光谱和拉曼光谱对比研究了处于表面活性剂胶束和脂质体磷脂双分子层中的Thermochromatium(Tch.)tepidum LH2的光谱响应.结果表明,与在表面活性剂胶束中相比,双分子层脂膜中LH2的Spirillox... 详细信息

采用动态光散射、透射电子显微镜、紫外-可见吸收光谱和拉曼光谱对比研究了处于表面活性剂胶束和脂质体磷脂双分子层中的Thermochromatium(Tch.)tepidum LH2的光谱响应.结果表明,与在表面活性剂胶束中相比,双分子层脂膜中LH2的Spirilloxanthin(一种含有13个共轭双键的类胡萝卜素)构象有明显差异;表面活性剂及磷脂分子端基的荷电状态对B850-Qy吸收谱有显著影响;Ca2+结合导致B850 Qy吸收谱带红移和增色,而H+结合则使该吸收谱带蓝移和减色.对LH2脱辅基蛋白氨基酸序列的分析结果表明,Ca2+和H+的结合位点可能位于α脱辅基蛋白的C-端一侧.B850 Qy吸收谱带对Ca2+和H+的响应特性可能与***适应其生存环境的能力有关.

关键词： Thermochromatium tepidum 外周捕光天线LH2 表面活性剂脂质体

超短光脉冲在光纤中传输计算机模拟计算的研究

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光学学报 1989年第7期9卷 646-652页

作者：章若冰张立原王清月天津大学精仪系

本文提出了一种研究超短光脉冲在介质中传输特性的简单的计算机计算方法.用该方法得到了正色散光纤中的频率调制、频谱加宽和方波自成形,以及负色散光纤中的一、二、三阶孤子传输.其数值计算结果与解非线性薛定谔方程的数值结果完全一致.

关键词：超短光脉冲光纤群速色散计算机

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低聚木糖对慢性腹泻症状的改善作用

食品科学 2022年第9期43卷 167-174页

作者：王沁玥仝艳军刘登洋吴顺红刘二停舒香玲杨瑞金江南大学食品学院江苏无锡214122 江南大学附属医院江苏无锡214041 河南益常青生物科技有限公司河南周口466000

本研究旨在探讨低聚木糖(xylooligosaccharides,XOS)对慢性腹泻的改善作用。基于随机平行对照实验原则,将临床慢性腹泻患者随机分为3组:安慰剂组(CK组,每天3 g麦芽糊精)、低剂量组(3X组,每天3 g XOS)和高剂量组(6X组,每天6 g XOS);干预... 详细信息

本研究旨在探讨低聚木糖(xylooligosaccharides,XOS)对慢性腹泻的改善作用。基于随机平行对照实验原则,将临床慢性腹泻患者随机分为3组:安慰剂组(CK组,每天3 g麦芽糊精)、低剂量组(3X组,每天3 g XOS)和高剂量组(6X组,每天6 g XOS);干预4周后,记录患者腹泻症状评分,测定患者血清生化指标、粪便中短链脂肪酸和肠道菌群的变化。随后用3组干预后患者粪菌液分别灌胃3组小鼠,连续灌胃24 d,测定其肠道通透性及炎症因子水平。结果表明,与安慰剂组相比,XOS干预患者4周后,患者腹泻症状和脂代谢有改善趋势,粪便中丁酸含量提高。与干预前相比,XOS干预患者粪便中Blautia、Bifidobacterium、Lachnospiraceae_unclassified等物种相对丰度增加,Prevotella等菌属相对丰度下降。与灌胃安慰剂组患者粪菌液的小鼠相比,灌胃XOS干预组患者粪菌液的小鼠肠道屏障趋于稳定状态,结肠炎症显著缓解,肠道通透性相关指标明显改善,血清中D-乳酸水平显著降低(P<0.05、P<0.01),闭锁小带蛋白(zonula occludens-1,ZO-1)和紧密连接蛋白Occludin表达量增加。综上,XOS在慢性腹泻的改善中发挥了较好的效果,具有潜在缓解慢性腹泻的作用。

关键词：慢性腹泻低聚木糖粪菌移植炎症因子肠道菌群

THE ABNORMAL NEUTRON STAR WITH ABNORMAL PROTONS—HOMOGENEOUS MODELS

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Chinese Science Bulletin 1983年第4期28卷 493-496页

作者：曲钦岳汪珍如初一陆埮 Department of Astronomy Nanjing University discussed the inhomogeneous model and came to the same conclusion.

In Refs. [1] and [2], we pointed out that there may be two kinds of neutron stars—the normal neutron star which consists of normal neutrons and the abnormal neutron star which consists of abnormal neutrons. The approximation of homogeneous stellar model was used in Refs. [1] and (2)Ref. [3] discussed the inhomogeneous model and came to the same conclusion.

关键词： neutron inhomogeneous stellar abnormal proton meson conclusion stars pointed Fermi

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定组态砂带粒度对刨花板磨削的影响

北京林业大学学报 2024年第9期46卷 141-150页

作者：罗斌杜瑶柳浩雨王钦悦李春瑜李黎刘红光北京林业大学材料科学与技术学院木质材料科学与应用教育部重点实验室木材科学与工程北京市重点实验室北京100083

【目的】为探究新型定组态砂带的微磨粒粒度对木质材料磨削性能的影响,为定组态砂带的设计和制备提供依据,开展了定组态砂带磨削试验。【方法】本研究制备150目、180目、220目3种不同粒度的定组态砂带(P-150/180/220),与220目的非定组... 详细信息

【目的】为探究新型定组态砂带的微磨粒粒度对木质材料磨削性能的影响,为定组态砂带的设计和制备提供依据,开展了定组态砂带磨削试验。【方法】本研究制备150目、180目、220目3种不同粒度的定组态砂带(P-150/180/220),与220目的非定组态砂带(O-220)对照,以刨花板为磨削对象,分别开展20万次磨削试验。对比不同微磨粒粒度的定组态砂带在磨削过程中材料去除量、刨花板表面粗糙度、砂带质量的变化,以分析定组态砂带粒度对磨削性能和砂带磨损的影响。【结果】(1)定组态砂带的刨花板去除量小于非定组态砂带,但稳定性远优于非定组态砂带;定组态砂带去除量的平均值与微磨粒粒度负相关,而随着磨粒粒度增大,定组态砂带去除量更加稳定。(2)定组态砂带磨削刨花板的表面粗糙度呈先下降后稳定,小范围上下波动的变化趋势;随着磨粒粒度的增大,刨花板表面粗糙度减小且更加稳定。(3)定组态砂带质量在磨削过程呈波浪形周期性下降;P-150砂带质量损失最快,P-180砂带质量下降最稳定;定组态砂带等效磨粒与表面微磨粒间存在补偿作用和协同作用。【结论】在等效磨粒形状和尺寸相同的情况下,微磨粒粒度对定组态砂带磨削性能有显著影响,但这种差异在粒度小的微磨粒中表现更加明显。本研究为定组态砂带的设计和生产提供了科学依据和理论支撑,促进了木材加工技术和砂带制造技术向高效智能化方向发展。

关键词：刨花板表面粗糙度砂带磨削粒度定组态砂带