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Distributed H∞-Consensus Filtering for Attitude Tracking Using Ground-Based Radars

IEEE TRANSACTIONS ON CYBERNETICS 2021年第7期51卷 3767-3778页

作者： Qu, Huifang Yang, fuwen Han, Qing-Long zhang, Yilian East China Univ Sci & Technol Sch Informat Sci & Engn Shanghai 200237 Peoples R China Griffith Univ Griffith Sch Engn Gold Coast Qld 4222 Australia Swinburne Univ Technol Sch Software & Elect Engn Melbourne Vic 3122 Australia Shanghai Maritime Univ Inst Logist Sci & Engn Shanghai 201306 Peoples R China

This paper is concerned with the distributed H8-consensus filtering problem on attitude tracking over a radar filter network subject to switching topology and random packet dropouts occurring in the data transmission from both the Sun sensor and the filters. Since ground-based radars cannot directly measure the satellite attitude, a Sun sensor is deployed at the satellite side and its measurements are transmitted to radar filters through different network communication channels while suffering from random packet dropouts with different probabilities. In the radar filter network, each radar filter receives data not only from the Sun sensor but also from its local neighboring radar filters in accordance with a switching network topology. A delicate distributed H-infinity-consensus filtering algorithm, which incorporates the effects of switching network topology and random packet dropouts, is adopted to estimate attitude and attitude-rate. The algorithm guarantees H-infinity-consensus attenuation performance for the estimation deviations among radar filters, and the robustness against the switching network topology and packet dropouts for the radar filter network. The illustrative examples are given to verify the effectiveness of the proposed distributed H-infinity-consensus filtering algorithm.

关键词： Attitude-rate distributed H-infinity-consensus filtering ground-based radar stations packet dropouts radar filter network satellite attitude switching topology

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Interactions of Microplastics and Methane Seepage in the Deep-Sea Environment

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Engineering 2023年第10期29卷 159-167页

作者： Jing-Chun Feng Zhifeng Yang Wenliang Zhou Xingwei Feng fuwen Wei Bo Li Chuanxin Ma Si zhang Linlin Xia Yanpeng Cai Yi Wang Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds Institute of Environmental and Ecological EngineeringGuangdong University of TechnologyGuangzhou 510006China Key Laboratory of Gas Hydrate Guangzhou Institute of Energy ConversionChinese Academy of SciencesGuangzhou 510640China Guangzhou Center for Gas Hydrate Research Chinese Academy of SciencesGuangzhou 510640China

Microplastics(MPs)are important exempla of the Anthropocene and are exerting an increasing impact on Earth’s carbon *** huge imbalance between the MPs floating on the marine surface and those that are estimated to have been introduced into the ocean necessitates a detailed assessment of marine MP ***,we demonstrate that cold seep sediments,which are characterized by methane fluid seepage and a chemosynthetic ecosystem,effectively capture and accommodate small-scale(<100μm)MPs,with 16 types of MPs being *** abundance of MPs in the surface of the sediment is higher in methane-seepage locations than in non-seepage *** seepage is beneficial to the accumulation,fragmentation,increased diversity,and aging of *** turn,the rough surfaces of MPs contribute to the sequestration of the electron acceptor ferric oxide,which is associated with the anaerobic oxidation of methane(AOM).The efficiency of the AOM determines whether the seeping methane(which has a greenhouse effect 83 times greater than that of CO_(2)over a 20-year period)can enter the atmosphere,which is important to the global methane cycle,since the deep-sea environment is regarded as the largest methane reservoir associated with natural gas hydrates.

关键词： Microplastics Anaerobic oxidation of methane Cold seeps Diversity index Fragmentation Gas hydrates

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Achieving High Fill Factor via Increasing Interfacial Disorder to Inhibit Bimolecular Recombination for Efficient Organic Solar Cells

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ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 2025年 e202505722页

作者： He, Dan Xie, Linwei Bai, Yahui zhang, Huotian Liu, Liping Kong, Jingyao Chai, Yongqiang Li, Xiaojun Wang, Mengni zhang, Yajie zhang, Jianqi Li, Yongfang Gao, Feng Guldi, Dirk M. Zhao, fuwen Cent South Univ Coll Chem & Chem Engn State Key Lab Powder Met Changsha 410083 Peoples R China Linkoping Univ Dept Phys Chem & Biol IFM SE-58183 Linkoping Sweden Friedrich Alexander Univ Erlangen Nurnberg Dept Chem & Pharm D-91058 Erlangen Germany Friedrich Alexander Univ Erlangen Nurnberg Interdisciplinary Ctr Mol Mat D-91058 Erlangen Germany Chinese Acad Sci Beijing Natl Lab Mol Sci CAS Key Lab Organ Solids Inst Chem Beijing 100190 Peoples R China Natl Ctr Nanosci & Technol CAS Ctr Excellence Nanosci CAS Key Lab Nanosyst & Hierarch Fabricat Beijing 100190 Peoples R China

The inferior fill factor (FF) is one of main reasons impeding further improvement of power conversion efficiencies (PCEs) in organic solar cells (OSCs). But no theoretical framework for high FFs has been established yet. Herein, an efficient strategy is developed to enhance FFs via introducing a small molecule, CNDT, into active layer to increase electron donor/acceptor interface disorder, raise energy barrier for charge back transfer, and thus reduce bimolecular recombination rate constant (krec). CNDTs tend to distribute over donor/acceptor interfaces and disturb molecular stacking of Y6 to deliver more disordered donor/acceptor interfaces but higher crystal quality in the D18:Y6+ blend film, compared to D18:Y6. Altogether, in the D18:Y6+ blend film, a higher energy of charge transfer state magnifies energy barrier for charge recombination to decrease charge recombination rate/ratio and reduce krec, inhibiting bimolecular recombination in devices. Therefore, FFs of OSCs are improved from 75.78% (D18:Y6) to 81.13% (D18:Y6+), yielding a higher PCE of 19.45%. Moreover, D18:L8-BO+ based OSCs feature FFs over 83%, a record for OSCs so far. PCE increases subsequently to 19.80%. It demonstrates that increasing interface disorder without sacrificing crystal quality enhances energy barrier of charge recombination and inhibits bimolecular recombination to efficiently improve FFs for higher PCEs.

关键词： Charge carrier recombination Donor/acceptor interfaces Fill factors Organic solar cells

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Shaking table test study on a five-story post-and-beam glulam structure

Shaking table test study on a five-story post-and-beam glula...

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2018 World Conference on Timber Engineering, WCTE 2018

作者： zhang, fuwen Chen, Xi Chen, Lingzhu Leng, Yubing Wang, Mingqian Xu, Qingfeng Shanghai Key Laboratory of Engineering Structure Safety SRIBS China

Multi-story and high rise timber structures are favored in Chinese timber market due to the high demand of space and the requirement of sustainable development. This paper presents a recent experimental study on the dynamic performance of multi-story timber structure. A half scaled model of a five-story post-and-beam glulam structure with and without braces was fabricated for shaking table tests with various excitations. Test results indicated that the timber frame without braces exhibited low stiffness, and the maximum inter-story drift of such structure under frequent 7-degree excitation was over the limits of relevant design codes. It was also found that the frequencies of the timber model increased by 202% and 274% after the installation of timber braces and steel-timber buckling restrained braces. The maximum inter-story drift of such reinforced structure subjected to 7-degree excitations can satisfy the requirement of the relevant design codes. The timber braces failed after the rare 8-degree excitations, while plastic deformation, instead of brittle fracture failure, took place in the steel-timber buckling restrained braces. The structures with suitable steel-timber buckling restrained braces can be used in the high intensive seismic region. © WCTE 2018 Committee.

关键词： Timber

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内嵌CFRP筋加固木梁持荷6年受力性能的试验研究

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建筑结构 2020年第5期50卷 15-19,14页

作者：王卓琳刘伟庆许清风王明谦张富文陈溪上海市建筑科学研究院有限公司上海市工程结构安全重点实验室上海200032 南京工业大学土木工程学院南京211816

为研究内嵌CFRP筋加固木梁在长期荷载作用下的受力性能,设计并制作了3个木梁试件,开展了6年的持荷试验,持续测试了木梁的跨中挠度变化和纯弯段木材的蠕变发展,并记录了环境温湿度变化对木材中和轴位置应变增量的影响。结果表明,对比木... 详细信息

为研究内嵌CFRP筋加固木梁在长期荷载作用下的受力性能,设计并制作了3个木梁试件,开展了6年的持荷试验,持续测试了木梁的跨中挠度变化和纯弯段木材的蠕变发展,并记录了环境温湿度变化对木材中和轴位置应变增量的影响。结果表明,对比木梁和加固木梁的初始缺陷均对其长期性能有重要影响,跨中不存在初始缺陷的加固木梁的挠度小于未加固对比木梁;而跨中存在明显初始缺陷的加固木梁的挠度高于未加固对比木梁,并在跨中木节周围出现了明显裂缝。根据试验结果对经典蠕变模型中的材料参数进行了拟合,拟合后的模型预测的木梁跨中挠度与试验结果比较吻合。

关键词：木梁内嵌CFRP筋长期性能持荷试验蠕变模型

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装配式混凝土结构套筒灌浆质量管控措施研究

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施工技术 2021年第3期50卷 12-14页

作者：高润东王卓琳李向民许清风张富文刘辉上海市建筑科学研究院有限公司上海市工程结构安全重点实验室上海200032

套筒灌浆质量对于保证装配式混凝土结构整体性能至关重要,在套筒灌浆前,针对预制构件生产、出厂和进场、吊装就位等关键环节,提出保证套筒与连通腔内部畅通的管控措施;在套筒灌浆过程中,针对灌浆、补灌施工等关键环节,提出保证套筒灌浆... 详细信息

套筒灌浆质量对于保证装配式混凝土结构整体性能至关重要,在套筒灌浆前,针对预制构件生产、出厂和进场、吊装就位等关键环节,提出保证套筒与连通腔内部畅通的管控措施;在套筒灌浆过程中,针对灌浆、补灌施工等关键环节,提出保证套筒灌浆饱满密实的管控措施。采取相关管控措施后,装配式混凝土结构套筒灌浆质量得到有效提高。

关键词：装配式混凝土套筒灌浆质量控制

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基于SMA装置的框架-受控摇摆墙结构抗震性能试验研究

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土木工程学报 2019年第4期52卷 41-51页

作者：董金芝李向民张富文蒋利学蒋璐许清风上海市建筑科学研究院上海市工程结构安全重点实验室上海200032 同济大学上海200092

该文提出一种新型的框架-受控摇摆墙结构实现形式,由SMA装置代替传统的预应力筋实现摇摆墙体的受控约束,在墙体与基础之间安装V形铰接支座实现墙体的摇摆及提供竖向支撑,并在墙体与框架柱间安装耗能连接件增强摇摆结构的耗能能力。通过... 详细信息

该文提出一种新型的框架-受控摇摆墙结构实现形式,由SMA装置代替传统的预应力筋实现摇摆墙体的受控约束,在墙体与基础之间安装V形铰接支座实现墙体的摇摆及提供竖向支撑,并在墙体与框架柱间安装耗能连接件增强摇摆结构的耗能能力。通过一个对比框架试件和一个基于SMA装置的框架-受控摇摆墙试件的低周往复试验,对比研究所提出的新型结构形式的抗震性能、破坏模式和自复位特性。试验结果表明:基于SMA装置的框架-受控摇摆墙结构的刚度和承载能力得到显著提高,提高幅度分别达到150%和103%;耗能连接件有效地发挥延性变形特性,使结构的滞回耗能能力显著提高,提高幅度达到183%,有效地减轻主体结构梁端、柱端以及梁柱节点区的损伤;所研发的SMA装置有效地实现了预设的工作机制,为摇摆墙体的自复位提供了恢复力;摇摆墙、耗能连接件和SMA装置的参数匹配还需进一步深入研究。

关键词：框架-摇摆墙可更换节点延性连接件形状记忆合金自复位

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Prolonging the exciton diffusion length by manipulating molecular stacking enables pseudo-planar heterojunction organic solar cells to achieve over 19% efficiency

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JOURNAL OF MATERIALS CHEMISTRY A 2024年第20期12卷 12208-12215页

作者： Wang, Ke Zhao, fuwen Zhu, Yufan He, Yi Liu, Zesheng Han, Xiao Ai, Qi Shen, Xingxing Li, Bao zhang, Jianqi Lin, Yuze Wang, Chunru He, Dan Cent South Univ Coll Chem & Chem Engn State Key Lab Powder Met Changsha 410083 Peoples R China Inst Chem Chinese Acad Sci Beijing Natl Lab Mol Sci CAS Key Lab Organ Solids Beijing 100190 Peoples R China Chinese Acad Sci Inst Chem Lab Mol Nanostruct & Nanotechnol Beijing 100190 Peoples R China Univ Chinese Acad Sci Coll Mat Sci & Optoelect Technol Beijing 100049 Peoples R China Univ Chinese Acad Sci Ctr Mat Sci & Optoelect Engn Beijing 100049 Peoples R China Univ Chinese Acad Sci CAS Ctr Excellence Topol Quantum Computat Beijing 100049 Peoples R China Univ Chinese Acad Sci CAS Key Lab Vacuum Phys Beijing 100049 Peoples R China Hebei Normal Univ Sci & Technol Coll Chem Engn Qinhuangdao 066004 Peoples R China Henan Normal Univ Sch Chem & Chem Engn Xinxiang 453007 Peoples R China CAS Ctr Excellence Nanosci Natl Ctr Nanosci & Technol CAS Key Lab Nanosyst & Hierarch Fabricat Beijing 100190 Peoples R China

The limited exciton diffusion length (LD) of organic semiconductors constraints exciton dissociation in pseudo-planar heterojunction (PPHJ) organic solar cells (OSCs), which is deemed the bottleneck hampering the further improvement in their power conversion efficiencies (PCEs). Herein, a solid-additive strategy was proposed to efficiently prolong the LD in PPHJ OSCs by developing a volatile solid additive, SA-5F, and blending it in non-fullerene acceptors. The addition of SA-5F endowed a Y6+ film with improved crystallinity and more compact molecular stacking, resulting in a higher photoluminescence quantum yield, larger overlap between its absorption and emission spectra, and shorter intermolecular distance compared with a pristine Y6 film. Thus, the Y6+ film achieved a higher exciton diffusion coefficient of 1.36 x 10-3 cm2 s-1 and, thus, similar to 24% improvement in the LD to 10.27 nm. The prolonged LD enabled D18/Y6+-based PPHJ devices to realize more efficient exciton dissociation and weaker charge recombination compared with their D18/Y6 counterparts. Therefore, D18/Y6+-based PPHJ OSCs afforded an impressive PCE of 19.11%, which is among the highest values reported to date. Moreover, this strategy exhibits excellent universality in improving the photovoltaic performance of different systems. Thus, it was demonstrated that introducing a solid additive is an efficient and universal strategy to prolong the LD in PPHJ OSCs and consequently boost their PCEs. A solid additive, SA-5F, is employed to promote molecular stacking, which leads to higher crystallinity, boosting the exciton diffusion coefficient and then exciton diffusion length. Thus, D18/Y6+-based PPHJ OSCs afford an impressive PCE of 19.11%.

关键词： Organic solar cells

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Balancing miscibility and crystallinity enables high-efficiency organic solar cells via ternary copolymerization

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JOURNAL OF POWER SOURCES 2024年 613卷

作者： Deng, Haojie Bai, Yahui Shen, Xingxing He, Dan zhang, Yajie zhang, Jianqi Zhao, fuwen Cent South Univ Coll Chem & Chem Engn State Key Lab Powder Met Changsha 410083 Peoples R China Hebei Normal Univ Sci & Technol Coll Chem Engn Qinhuangdao 066004 Peoples R China Natl Ctr Nanosci & Technol CAS Ctr Excellence Nanosci CAS Key Lab Nanosyst & Hierarch Fabricat Beijing 100190 Peoples R China

Due to the limited exciton diffusion length and relatively low charge carrier mobilities of organic photovoltaic materials, donor/acceptor blends in organic solar cells (OSCs) have to form nanoscale interpenetrating network morphology with orderly molecular stacking to simultaneously ensure exciton diffusion to donor/acceptor interfaces and charge carrier transport to electrodes. Herein, two terpolymer donors, XD1 and XD2, are developed via inserting N-ethyl-2,2 '-bithiophene-3,3 '-dicarboximide (BTI) unit into the molecular skeleton of D18 on account of the traits of BTI. The crystallinity and miscibility of terpolymer donors increase along with the BTI ratio. The dual functions of introducing BTI make polymer:Y6 blend films exhibit the tendency of first improving then deteriorating in crystallinity, phase separation, trap density and thus charge carrier dynamics, resulting in shortcircuit current density and fill factor of OSCs to present the same trend. Among them, XD1:Y6 based OSCs well balance the dual functions of introducing BTI to acquire the optimized morphology, and thus achieve an impressive power conversion efficiency (PCE) of 19.13 %, which is among the highest values of OSCs. This work not only affords guidelines for developing high-performance terpolymer donors, but also demonstrates the importance of juggling crystallinity and miscibility of organic photovoltaic materials to boost PCEs of OSCs.

关键词： Organic solar cells Ternary copolymerization Miscibility Crystallinity Morphology

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设置碟形弹簧的框架-摇摆墙结构抗震性能试验研究

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建筑结构学报 2019年第8期40卷 61-70页

作者：蒋璐李向民张富文董金芝蒋利学许清风上海市建筑科学研究院上海市工程结构安全重点实验室

受控摇摆墙通常采用预应力筋的形式实现,预应力筋基础锚固施工困难,墙体摇摆幅度很小且易与基础发生碰撞.为解决上述问题,研发了一种受控摇摆墙,主要通过基于碟形弹簧的装置实现墙体的受控约束,墙体与主体框架、基础分别采用耗能连接件... 详细信息

受控摇摆墙通常采用预应力筋的形式实现,预应力筋基础锚固施工困难,墙体摇摆幅度很小且易与基础发生碰撞.为解决上述问题,研发了一种受控摇摆墙,主要通过基于碟形弹簧的装置实现墙体的受控约束,墙体与主体框架、基础分别采用耗能连接件和V形支撑连接.设计制作了缩尺比为1∶2的对比框架与框架-摇摆墙试件,通过低周往复加载试验研究其抗震性能、破坏模式和自复位特性.结果表明,设置碟形弹簧的框架-摇摆墙较对比框架承载力提高了107.1%,且具有更好的刚度退化性能与耗能性能,框架结构的变形模式得到改善,使得各层的层间位移趋于均匀.连接件是影响框架-摇摆墙结构耗能及协调层间变形的关键,应进一步研究其改进措施及优化设计.

关键词：框架-摇摆墙碟形弹簧延性连接件拟静力试验变形模式耗能能力

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