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Enhanced flexural performance of epoxy polymer concrete with short natural fibers

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Science China(Technological Sciences) 2018年第8期61卷 1107-1113页

作者： HU Bin ZHANG NanLi liao yutian PAN ZhiWei LIU YiPing ZHOU LiCheng LIU ZeJia JIANG ZhenYu School of Civil Engineering and Transportation State Key Laboratory of Subtropical Building Science South China University of Technology The State Key Laboratory of Nonlinear Mechanics Institute of Mechanics Chinese Academy of Sciences

Epoxy polymer concrete(EPC) has found various applications in civil engineering. To enhance the flexural performance of EPC,two kinds of short natural fibers with high specific strength(sisal fibers and ramie fibers) have been incorporated into EPC. The results of mechanical tests show that a small loading of natural fibers(0.36 vol%) can significantly increase the flexural strength of EPC by 25.3%(ramie fibers) or 10.4%(sisal fibers). This enhancement is achieved without any sacrifice of compressive strength of EPC. The reinforcing effects of short natural fibers on the flexural properties and compressive properties of EPC decrease with further increase in fiber content, due to the insufficient wetting of fibers by epoxy resin which results in poor interfacial bonding. The reinforcing mechanisms of short natural fibers are explored according to the observation of fracture surfaces and micromechanical modelling. It is found that the parallel model based on the rule of mixture can be a good approximation to describe the improvement in flexural strength of the short natural fiber reinforced EPC at low fiber volume fractions.

关键词： epoxy polymer concrete (EPC) natural fibers fiexural strength micromechanics models

Broadband light management in hydrogel glass for energy efficient windows

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Frontiers of Optoelectronics 2022年第3期15卷 45-53页

作者： Jia Fu Chunzao Feng yutian liao Mingran Mao Huidong Liu Kang Liu MOE Key Laboratory of Hydraulic Machinery Transients School of Power and Mechanical EngineeringWuhan UniversityWuhan 430072China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China

Windows are critically important components in building envelopes that have a signifcant efect on the integral energy *** energy saving,here we propose a novel design of hydrogel-glass which consists of a layer of hydrogel and a layer of normal *** with traditional glass,the hydrogel-glass possesses a higher level of visible light transmission,stronger near-infrared light blocking,and higher mid-infrared thermal *** these properties,hydrogel-glass based windows can enhance indoor illumination and reduce the temperature,reducing energy use for both lighting and *** savings ranging from 2.37 to 10.45 MJ/m2 per year can be achieved for typical school buildings located in diferent cities around the world according to our *** broadband light management covering the visible and thermal infrared regions of the spectrum,hydrogel-glass shows great potential for application in energy-saving windows.

关键词： Hydrogel Light management Windows Energy saving Broadband

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可见红外双波段智能伪装织物

工程热物理学报 2023年第5期44卷 1304-1308页

作者：廖雨田王晨逸毛铭冉刘辉东刘抗武汉大学动力与机械学院武汉430072

随着红外侦测技术的快速发展,提高热物体的红外伪装能力在国防领域具有重要意义。本文提出一种可见红外双波段智能伪装织物,利用纳米多孔吸湿膜红外发射率的温度自适应性,实现织物红外动态伪装;并利用红外透明的表层设计织物颜色,实现... 详细信息

随着红外侦测技术的快速发展,提高热物体的红外伪装能力在国防领域具有重要意义。本文提出一种可见红外双波段智能伪装织物,利用纳米多孔吸湿膜红外发射率的温度自适应性,实现织物红外动态伪装;并利用红外透明的表层设计织物颜色,实现可见与红外兼容伪装。实验表明,当织物温度在22~64℃之间变化时,其红外发射率能在0.95~0.38范围内自适应调节。该织物将可见颜色与红外辐射的调控集于一片柔性布上,在可见红外兼容智能伪装技术领域具有一定的应用前景。

关键词：智能伪装织物红外波可见光

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纳米药物载体用于治疗胞内菌感染的研究进展

化工学报 2024年第4期75卷 1153-1166页

作者：巨晓洁宋婉璐周宸宇沈秋彤廖雨田龚珏颖褚良银四川大学化学工程学院四川成都610065

胞内菌能够逃避机体免疫并在宿主细胞内正常生长繁殖,比起胞外细菌更难清除,容易造成较为严重的感染。传统的抗生素治疗,药物无法突破宿主细胞膜的屏障,并且容易引起较强的毒副作用和多药耐药性。优良的纳米载体具有良好的生物相容性且... 详细信息

胞内菌能够逃避机体免疫并在宿主细胞内正常生长繁殖,比起胞外细菌更难清除,容易造成较为严重的感染。传统的抗生素治疗,药物无法突破宿主细胞膜的屏障,并且容易引起较强的毒副作用和多药耐药性。优良的纳米载体具有良好的生物相容性且易于修饰,有望通过构建纳米药物递送系统增强抗菌药物的细胞膜穿透性和胞内菌靶向性,在治疗胞内菌感染上具有巨大潜力和广阔前景。介绍了目前可用于治疗胞内菌感染的各种纳米颗粒,归纳总结了增强纳米药物递送系统治疗效果的机制和方法,阐述了目前在使用纳米药物递送系统治疗胞内菌感染时仍存在的问题,以期为构建更优良的纳米药物递送系统治疗胞内菌感染提供启发。

关键词：纳米载体胞内菌细菌靶向抗菌策略

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环氧树脂-混凝土的早龄期压缩性能

复合材料学报 2019年第12期36卷 2735-2744页

作者：黄钰桐马东鹏廖雨田刘逸平蒋震宇汤立群华南理工大学土木与交通学院

环氧树脂-混凝土是混合环氧树脂、固化剂和骨料后养护成型的一种新型聚合物混凝土,早期强度增长快是其优异性能之一。本文通过对不同养护龄期的环氧树脂-混凝土进行单轴压缩试验,研究其早龄期压缩性能。试验结果表明,在养护龄期的最初24... 详细信息

环氧树脂-混凝土是混合环氧树脂、固化剂和骨料后养护成型的一种新型聚合物混凝土,早期强度增长快是其优异性能之一。本文通过对不同养护龄期的环氧树脂-混凝土进行单轴压缩试验,研究其早龄期压缩性能。试验结果表明,在养护龄期的最初24h内环氧树脂-混凝土压缩强度迅速增大,养护24h的压缩强度达50.3MPa。基于环氧树脂-混凝土的强度增长机制和养护72h后压缩强度趋于稳定的现象,建立了一种基于环氧树脂n级固化反应的环氧树脂-混凝土早龄期压缩强度预测模型,该模型比普通水泥混凝土经典的CEB-FIP、ACI209强度预测模型具有更好的预测效果。基于压缩强度预测和实验结果,建立了考虑龄期的环氧树脂-混凝土单轴压缩本构模型,该模型能较好地预测环氧树脂-混凝土早龄期压缩应力-应变关系。

关键词：环氧树脂-混凝土早龄期单轴压缩本构模型压缩强度 n级固化模型

天然纤维/环氧树脂-混凝土的力学性能及老化规律

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复合材料学报 2019年第6期36卷 1510-1519页

作者：潘志伟马东鹏廖雨田刘逸平蒋震宇汤立群华南理工大学土木与交通学院

环氧树脂-混凝土是由混合树脂、固化剂和砂石骨料等原料固化成型的一种复合材料,因其优异的性能已成为土木与建筑应用中富有潜力的新型工程材料。本文将高性能的天然纤维(剑麻和苎麻)引入环氧树脂-混凝土中,以进一步增强其力学性能。实... 详细信息

环氧树脂-混凝土是由混合树脂、固化剂和砂石骨料等原料固化成型的一种复合材料,因其优异的性能已成为土木与建筑应用中富有潜力的新型工程材料。本文将高性能的天然纤维(剑麻和苎麻)引入环氧树脂-混凝土中,以进一步增强其力学性能。实验结果表明,极少含量的天然纤维便能够提升环氧树脂-混凝土的抗弯拉强度,体积分数为0.36vol%的剑麻纤维和苎麻纤维可以将混凝土的抗弯拉强度分别提高10.5%和8.4%。天然纤维对环氧树脂-混凝土抗弯拉强度的增强效应可以用基于混合率的并联模型描述,模型预测结果与实测结果相比,相对误差低于5.1%。利用紫外光耐气候试验箱模拟华南地区自然环境的日照辐射和湿热条件,研究了天然纤维/环氧树脂-混凝土抗弯拉性能随老化时间的衰减。当等效老化时间为6年时,天然纤维/环氧树脂-混凝土的抗弯拉强度分别下降了14.3%(剑麻纤维)和15.9%(苎麻纤维)。实验观察到的衰减规律可采用复合材料湿热老化的剩余强度模型描述。

关键词：环氧树脂-混凝土天然纤维抗弯拉强度混合率老化剩余强度模型

The burgeoning importance of PIWI-interacting RNAs in cancer progression

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Science China(Life Sciences) 2024年第4期67卷 653-662页

作者： Xinpei Deng Tianle liao Jindong Xie Da Kang Yiwei He Yuying Sun Zhangling Wang Yongluo Jiang Xuan Miao Yixuan Yan Hailin Tang Lewei Zhu yutian Zou Peng Liu State Key Laboratory of Oncology in South China Guangdong Provincial Clinical Research Center for CancerSun Yat-sen University Cancer CenterGuangzhou 510060China School of Medicine Sun Yat-sen UniversityShenzhen 518107China Key Laboratory of Cardiovascular and Cerebrovascular Medicine Nanjing Medical UniversityNanjing 211166China Guanghua School of Stomatology Sun Yat-sen UniversityGuangzhou 510062China The First People’s Hospital of Foshan Foshan 528000China

PIWI-interacting RNAs(pi RNAs)are a class of small noncoding RNA molecules that specifically bind to piwi protein family members to exert regulatory functions in germ *** studies have found that pi RNAs,as tissue-specific molecules,both play oncogenic and tumor suppressive roles in cancer progression,including cancer cell proliferation,metastasis,chemoresistance and ***,the atypical manifestation of pi RNAs and PIWI proteins in various malignancies presents a promising strategy for the identification of novel biomarkers and therapeutic targets in the diagnosis and management of ***,the precise functions of pi RNAs in cancer progression and their underlying mechanisms have yet to be fully *** review aims to examine current research on the biogenesis and functions of pi RNA and its burgeoning importance in cancer progression,thereby offering novel perspectives on the potential utilization of pi RNAs and piwi proteins in the management and treatment of advanced cancer.

关键词： PIWI-interacting RNAs/piRNAs cancer progression metastasis chemoresistance stemness

Theory and application of stability for stochastic reaction diffusion systems

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Science in China(Series F) 2008年第2期51卷 158-170页

作者： LUO Qi DENG FeiQi MAO XueRong BAO JunDong ZHANG yutian College of Information and Control Nanjing University of Information Science & Technology Nanjing 210044 China College of Automation South China University of Technology Guangzhou 410640 China Department of Statistics and Modelling Science University of-Strathc/yde Glasgow G1 IXH Scotland UK Coilege of Mathematics Science Inner Mongolia Normal'University Huhhot 010000 China College of Mathematics and Physics Nanjing University of Information Science & Technology Nanjing 210044 China

So far, the Lyapunov direct method is still the most effective technique in the study of stability for ordinary differential equations and stochastic differential equations. Due to the shortage of the corresponding It6 formula, this useful method has not been popularized in stochastic partial differential equations. The aim of this work is to try to extend the Lyapunov direct method to the It6 stochastic reaction diffusion systems and to establish the corresponding Lyapunov stability theory, including stability in probablity, asymptotic stability in probablity, and exponential stability in mean square. As the application of the obtained theorems, this paper addresses the stability of the Hopfield neural network and points out that the main results ob- tained by Holden Helge and liao Xiaoxin et al. can be all regarded as the corollaries of the theorems presented in this paper.

关键词： stochastic reaction diffusion system stability in probability asymptotic stability in probability exponentialstability in mean square

基于有序充电策略的换电站及分布式电源多场景协调规划方法

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电力自动化设备 2017年第9期37卷 62-69页

作者：田园园廖清芬徐雨田陈懿武汉大学电气工程学院湖北武汉430072

通过引入电动汽车换电站的有序充电策略,以系统建设运行成本、综合净负荷波动指标以及网络能量损耗最小为目标,提出统筹考虑电动汽车换电站和分布式电源的多场景协调规划方法,并给出满足电动汽车换电需求约束和备用电池存在性约束的备... 详细信息

通过引入电动汽车换电站的有序充电策略,以系统建设运行成本、综合净负荷波动指标以及网络能量损耗最小为目标,提出统筹考虑电动汽车换电站和分布式电源的多场景协调规划方法,并给出满足电动汽车换电需求约束和备用电池存在性约束的备用电池调度方案和最少备用电池计算方法。结合风光电源出力的季节特性,针对IEEE 33节点系统,利用生物地理优化算法进行多场景规划仿真分析,验证了所提规划方法可利用换电站有序充电策略平抑配电网综合净负荷波动,起到了削峰填谷的作用,大幅降低了网络能量损耗,显著提高了风光电源的可规划容量;同时所采用的最少备用电池计算方法,可充分考虑换电站内备用电池在一天中的循环利用,在维持有序充电策略周转的前提下能有效缓解电池储备压力,大幅降低了换电站投资成本。

关键词：电动汽车换电站分布式电源多场景规划备用电池有序充电