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Enhance the performance of polymer solar cells via extension of the flanking end groups of fused ring acceptors

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Science China Chemistry 2018年第10期61卷 1320-1327页

作者： Shiyu Feng danyang ma Liangliang Wu Yahui Liu Cai'e Zhang Xinjun Xu Xuebo Chen Shouke Yan Zhishan Bo Key Laboratory of Energy Conversion and Storage materials College of Chemistry Key Laboratory of Theoretical and Computational Photochemistry Ministry of Education Beijing Normal University State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology

Two new fused ring electron acceptors(FREAs)IDT-IC-T and IDT-IC-B with thienyl or phenyl substituents at the terminal INCN unit are *** calculations indicate that the two acceptors dominantly favor an intermolecularπ-πstacking between the flanking terminal *** twist angle between the aryl substituent and INCN unit has a significant influence on theπ-πstacking distance of terminal ***-IC-T with a smaller twist angle has a shorterπ-πstacking distance than that of IDT-IC-B with a larger twist *** addition,extending the conjugation also affects the blend film ***-IC-T and IDT-IC-B based photoactive films show appropriate nanoscale phase separations;whereas,blend films based on the parent compound IDT-IC show large-size acceptor *** expected,PBDB-T:IDT-IC-T blend films show higher and more balanced electron and hole ***,these two acceptors present a good charge-transport connectivity arising from the extended conjugation and the increased intermolecular ***,IDT-IC-T demonstrates the highest electron mobility(1.47×10^(-4)cm^2V^(-1)s^(-1))and the best power conversion efficiency(PCE)of 9.43%.As for IDT-IC,which only shows an electron mobility of 7.33×10^(-5)cm^2V^(-1)s^(-1)and a PCE of 5.82%.These findings provide a facile and effective way to improve the photovoltaic performance.

关键词： non-fullerene extended end groups high charge mobility polymer solar cells

Sliding Mode Variable Structure Control on Vienna Rectifier

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Sliding Mode Variable Structure Control on Vienna Rectifier

钢管混凝土加劲混合结构轴心受压工作机理及可靠性分析

第32届中国控制与决策会议

作者： Xiping Huang danyang ma Xi Chen School of Automation and Information Engineering Xi’an University of Technology

Based on the mathematical model of Vienna rectifier,the controller of Vienna rectifier is researched and *** voltage outer loop adopt the sliding mode variable structure control（SMC）,in order to obtain a stable DC output voltage when Vienna rectifier is starting or is affected by the load disturbance and so *** deviation of the output voltage is selected as the sliding mode switching *** the chattering problems of the traditional index approach rate,the variable index approach law is proposed in this *** current inner loop uses model predictive control on finite set（FCS-MPC） of no modulation unit,easy to add constraints,strong anti-interference ***,the proposed control strategy is *** simulation results show that the method is correct and effective,the Vienna rectifier has strong robustness and anti-interference ability.

关键词： Vienna Rectifier Sliding Mode Variable Structure The Variable Index Approach Law Model Prediction Control on Finite Set

来源： cnki会议评论

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土木工程学报 2024年第3期57卷 16-29,80页

作者：马丹阳杨志程北京航空航天大学北京100191 清华大学北京100086

钢管混凝土加劲混合结构是由内置钢管混凝土部分和外包钢筋混凝土部分混合而成的结构,由于其在承载力、刚度和延性上的优势,已在工程结构中得到应用。国家标准《钢管混凝土混合结构技术标准》(GB/T 51446—2021)给出其轴压承载力和刚度... 详细信息

钢管混凝土加劲混合结构是由内置钢管混凝土部分和外包钢筋混凝土部分混合而成的结构,由于其在承载力、刚度和延性上的优势,已在工程结构中得到应用。国家标准《钢管混凝土混合结构技术标准》(GB/T 51446—2021)给出其轴压承载力和刚度计算方法。但以往研究主要针对单一参数,尚缺少多参数耦合作用下受力机理研究;且亟需验证承载力计算方法的可靠性,为各行业下的安全性设计提供依据。该文首先建立了轴心受压试验数据库,分析了影响该类结构轴压性能的关键参数;之后,运用验证后的精细化有限元模型开展多参数耦合作用分析,明晰多参数耦合作用对结构刚度、承载力的影响规律,弥补试验研究的局限性,并进一步揭示结构在短期、长期荷载下的内力分布规律,为长期服役下安全性分析提供依据。在参数分析的基础上,开展可靠性分析,确定该类结构在房屋建筑、铁路桥涵、公路桥涵和港口工程中的可靠度指标,验证国家标准中轴压承载力设计方法的可靠性。

关键词：钢管混凝土加劲混合结构轴心受压性能参数化建模多参数耦合作用可靠性分析

Sensitivity of arid/humid patterns in China to future climate change under a high-emissions scenario

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Journal of Geographical Sciences 2019年第1期29卷 29-48页

作者： ma danyang DENG Haoyu YIN Yunhe WU Shaohong ZHENG Du Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources Research CAS University of Chinese Academy of Sciences Henan Province Development and Reform Commission

Changes in regional moisture patterns under the impact of climate change are an important focus for science. Based on the five global climate models (GCMs) participating in the Coupled Model Intercomparison Project Phase 5 (CMIP5), this paper projects trends in the area of arid/humid climate regions of China over the next 100 years. It also identifies the regions of arid/humid patterns change and analyzes their temperature sensitivity of responses. Results show that future change will be characterized by a significant contraction in the humid region and an expansion of arid/humid transition zones. In particular, the sub-humid region will expand by 28.69% in the long term (2070-2099) relative to the baseline period (1981-2010). Under 2°C and 4°C warming, the area of the arid/humid transition zones is projected to increase from 10.17% to 13.72% of the total of China. The humid region south of the Huaihe River Basin, which is affected mainly by a future increase in evapotranspiration, will retreat southward and change to a sub-humid region. In general, the sensitivity of responses of arid/humid patterns to climate change in China will intensify with accelerating global warming.

关键词： arid/humid patterns climate change sensitivity aridity index China

中国干湿格局对未来高排放情景下气候变化响应的敏感性

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地理学报 2019年第5期74卷 857-874页

作者：马丹阳尹云鹤吴绍洪郑度中国科学院地理科学与资源研究所中国科学院陆地表层格局与模拟重点实验室北京100101 中国科学院大学北京100049 河南省发展和改革委员会郑州450018

气候变化影响下干湿状况的区域分异格局如何变化是一个重要科学问题。基于参与耦合模式比较计划第五阶段(CMIP5)的5个全球气候模式(GCM),预估了RCP 8.5情景下未来百年中国干湿区面积的变化趋势,分析了干湿格局变化的敏感地区以及对气候... 详细信息

气候变化影响下干湿状况的区域分异格局如何变化是一个重要科学问题。基于参与耦合模式比较计划第五阶段(CMIP5)的5个全球气候模式(GCM),预估了RCP 8.5情景下未来百年中国干湿区面积的变化趋势,分析了干湿格局变化的敏感地区以及对气候变化响应的敏感性。结果表明:未来干湿格局变化以湿润区显著减少、干湿过渡区显著扩张为主要特征,特别是半湿润区面积在远期(2070-2099年)相对基准期(1981-2010年)增加了28.69%。升温2℃～4℃条件下,全国发生干湿类型转变的面积从10.17%增加至13.72%,尤其在淮河流域南部,这里主要受未来潜在蒸散增加的影响,湿润区向南明显退缩从而转变为半湿润区。总体上,随着未来升温加剧,中国干湿格局对气候变化响应的敏感性将可能增强。

关键词：干湿格局气候变化敏感性干湿指数中国

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近红外光响应液晶弹性体

化学进展 2020年第10期32卷 1452-1461页

作者：王猛马丹阳王成杰东南大学化学化工学院南京211189 中国航空油料有限责任公司北京100088

刺激-响应液晶弹性体是一类新兴的智能聚合物材料,其在外界刺激(热、光、电、磁场等)下会产生大尺寸的可逆形变,因此具有广阔的应用前景。由于单轴取向的液晶基元的微观顺序或分子结构的变化,整个液晶弹性体材料在液晶相向各向同性相转... 详细信息

刺激-响应液晶弹性体是一类新兴的智能聚合物材料,其在外界刺激(热、光、电、磁场等)下会产生大尺寸的可逆形变,因此具有广阔的应用前景。由于单轴取向的液晶基元的微观顺序或分子结构的变化,整个液晶弹性体材料在液晶相向各向同性相转变过程中可以发生非常大的可逆宏观形变。其中,由于近红外光的强穿透力和对生物组织的低毒性,近红外光响应液晶弹性体受到了科学家们的广泛关注。近红外光响应液晶弹性的变形机制主要分为两大类。一种是通过掺杂无机或有机上转换材料将近红外光转化为低波长的光,激发偶氮苯发生顺反异构化。另一种近红外光响应液晶弹性体利用导热填料的光热效应将光转化为热,从而进一步诱导液晶相向各向同性相转变,从而使液晶弹性体材料发生形变。这些优点使近红外光响应液晶弹性体具有潜在的应用价值,如驱动器、人造器官、智能表面和微型机器人等。本文综述了近红外激光响应材料的研究进展,详细介绍了近红外光响应材料的主要变形机理及其应用,并对近红外光响应液晶弹性体和软驱动器的发展前景进行了展望。

关键词：液晶弹性体近红外光光热效应智能材料软驱动器

莫高窟第254窟五佛、白衣佛和八佛题材考辨

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故宫博物院院刊 2023年第6期 14-23,137页

作者：陈菊霞马丹阳上海大学历史系

依据莫高窟第254窟千佛题名的最新校录与研究成果,我们在前贤的研究基础上对该窟中心柱的五佛、西壁的白衣佛和南北壁的八佛组合题材作了进一步的考辨,认为中心柱五佛是现在贤劫千佛之前五佛,即贤劫四佛+弥勒佛;白衣佛是现在贤劫千佛的... 详细信息

依据莫高窟第254窟千佛题名的最新校录与研究成果,我们在前贤的研究基础上对该窟中心柱的五佛、西壁的白衣佛和南北壁的八佛组合题材作了进一步的考辨,认为中心柱五佛是现在贤劫千佛之前五佛,即贤劫四佛+弥勒佛;白衣佛是现在贤劫千佛的“代言人”;八佛是过去七佛+弥勒佛的组合造像。

关键词：第254窟五佛白衣佛八佛

一种基于wirehair码的高可靠分布式存储方案的研究与实现

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信息网络安全 2018年第2期 20-26页

作者：邓凯田志宏马丹阳中国工程物理研究院计算机应用研究所四川绵阳621900 广州大学网络空间先进技术研究院广东广州510006

在分布式存储中,每一个分布式存储节点的数据可用性都是极其重要的。因此,必须加入相应的冗余措施来保障数据的可用性。而传统基于复制的冗余策略会随着数据可用性的提高而极大增加冗余开销。同时,随着分布式存储节点个数的增加,部分节... 详细信息

在分布式存储中,每一个分布式存储节点的数据可用性都是极其重要的。因此,必须加入相应的冗余措施来保障数据的可用性。而传统基于复制的冗余策略会随着数据可用性的提高而极大增加冗余开销。同时,随着分布式存储节点个数的增加,部分节点遭受物理攻击、窃取的可能性也相应增大,极大增加了对于敏感数据的安全威胁。文章在对Raptor码深入研究的基础上,提出一种基于Raptor码的分布式存储方案。且通过大量实验测试,设计并实现了一种基于wirehair码(RaptorQ的开源实现)的分布式存储系统。该系统不仅能以较小的冗余实现较高的数据可用性,且通过编码过程增加了原始数据的安全性。

关键词：分布式存储 wirehair码冗余 Raptor码

Identifying the dynamic behaviors in complete reconstruction of Co-based complex precatalysts during electrocatalytic oxygen evolution

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Journal of Energy Chemistry 2025年第1期100卷 226-233页

作者： Jingfang Zhang danyang Wu Linke Cai Youluan Lu Fanpeng Cheng Lijuan Shi Qun Yi Yao Liu Yi Huang Key Laboratory of Green Chemical Engineering Process of Ministry of Education Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education Hubei Key Laboratory of Novel Reactor and Green Chemical Technology School of Chemical Engineering & Pharmacy Wuhan Institute of Technology Key Laboratory of Pesticide & Chemical Biology of Ministry of Education Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction of Ministry of Education College of Chemistry Central China Normal University College of materials Science and Engineering Fuzhou University

Transition metal-based nanomaterials have emerged as promising electrocatalysts for oxygen evolution reaction（OER）. Considerable research efforts have shown that self-reconstruction occurs on these nanomaterials under operating conditions of OER process. However, most of them undergo incomplete reconstruction with limited thickness of reconstruction layer, leading to low component utilization and arduous exploration of real catalytic mechanism. Herein, we identify the dynamic behaviors in complete reconstruction of Co-based complexes during OER. The hollow phytic acid（PA） cross-linked CoFe-based complex nanoboxes with porous nanowalls are designed because of their good electrolyte penetration and mass transport ability, in favor of the fast and complete reconstruction. A series of experiment characterizations demonstrate that the reconstruction process includes the fast substitution of PA by OH-to form Co（Fe）(OH)xand subsequent potential-driven oxidation to Co（Fe）OOH. The obtained CoFeOOH delivers a low overpotential of 290 mV at a current density of 10 ma cm-2and a long-term *** experiment results together with theory calculations reveal that the Fe incorporation can result in the electron rearrangement of reconstructed CoFeOOH and optimization of their electronic structure,accounting for the enhanced OER activity. The work provides new insights into complete reconstruction of metal-based complexes during OER and offers guidelines for rational design of high-performance electrocatalysts.

关键词： Complete reconstruction Co-based complex Precatalysts Oxygen evolution reaction