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Quality evaluation of lightweight cellular concrete by an ultrasound-based method

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Frontiers of Structural and Civil Engineering 2022年第9期16卷 1170-1182页

作者： Xin LIU Dongning SUN Jinhe LIAO Zhiwei SHAO Yunqiang SHI Siqing ZHANG yunlong yao Baoning HONG Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering Hohai UniversityNanjing 210098China Institute of Tunnel and Underground Engineering Hohai UniversityNanjing 210098China Geotechnical Research Institute Hohai UniversityNanjing 210098China Foshan Jianying Development Co. Ltd.Foshan 528041China

The accuracy of subgrade quality evaluation is important for road safety assessment.Since there is little research work devoted to testing lightweight cellular concrete(LCC)by an ultrasound-based method,the quantitative relation between ultrasonic testing results and the quality of LCC subgrade is not well understood.In this paper,the quality of LCC subgrade was evaluated with respect to compressive strength and crack discrimination.The relation between ultrasonic testing results and LCC quality was explored through indoor tests.Based on the quantitative relation between ultrasonic pulse velocity and compressive strength of LCC,a fitting formula was established.Moreover,after the LCC became cracked,the ultrasonic pulse velocity and ultrasonic pulse amplitude decreased.After determining the lower limiting values of the ultrasonic pulse velocity and ultrasonic pulse amplitude through the statistical data,it could be calculated whether there were cracks in LCC subgrade.The ultrasonic testing results showed that the compressive strength of the LCC subgrade was suitable for purpose and there was no crack in the subgrade.Then core samples were taken from the subgrade.Comparisons between ultrasonic testing results of subgrade and test results of core samples demonstrated a good agreement.

关键词： lightweight cellular concrete subgrade ultrasound testing quality evaluation crack discrimination

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海上风机桩-筒复合基础基频特性分析

浙江工业大学学报 2024年第2期52卷 142-148页

作者：袁宗浩姚云龙何奔李娜许丹婷潘晓东浙江工业大学土木工程学院浙江杭州310023 中国电建集团华东勘测设计研究院有限公司浙江杭州311122

桩-筒复合基础作为海上风机的一种新型基础型式,在提高单桩承载力方面相较于单桩基础具有一定优势,然而筒体对风机结构基频特性的影响规律尚不明确。为研究该问题,对风机塔筒进行解析建模,结合有限元,建立了不同几何尺寸的单桩基础和桩... 详细信息

桩-筒复合基础作为海上风机的一种新型基础型式,在提高单桩承载力方面相较于单桩基础具有一定优势,然而筒体对风机结构基频特性的影响规律尚不明确。为研究该问题,对风机塔筒进行解析建模,结合有限元,建立了不同几何尺寸的单桩基础和桩-筒复合基础,将数值模型获得的基础刚度与上部塔筒解析模型进行耦合,提出了分析风机整机结构基频特性的有限元-解析耦合法。研究结果表明有限元-解析耦合法能够快速地实现风机整机结构基频预测。对比桩-筒复合基础与单桩基础基频特性发现:筒体的加入能有效提升单桩基础刚度,可以在不改变单桩基础桩径的前提下,有效提升结构第一阶固有频率,筒外径对基础基频的影响比筒壁高的影响更大。

关键词：第一阶固有频率有限元-解析耦合法桩-筒复合基础基础刚度动力特性

数字林草赋能风景园林人才培养的逻辑转向与实践路径

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黑龙江农业科学 2024年第3期 93-97页

作者：王蕾张心语翟雅琳姚允龙东北林业大学园林学院黑龙江哈尔滨150040 黑龙江省寒区园林植物种质资源开发与景观生态修复重点实验室黑龙江哈尔滨150040 东北林业大学野生动物与自然保护地学院黑龙江哈尔滨150040

林草系统作为稳定国家生态安全的重要绿地基础,能够提升数字林草系统监测和保护的效率与质量,还能有效推进生态文明建设和可持续发展。风景园林专业作为林草科技创新人才培养的重要载体,面临着教学结构固化、产教融合不足等问题,急需抓... 详细信息

林草系统作为稳定国家生态安全的重要绿地基础,能够提升数字林草系统监测和保护的效率与质量,还能有效推进生态文明建设和可持续发展。风景园林专业作为林草科技创新人才培养的重要载体,面临着教学结构固化、产教融合不足等问题,急需抓住数字林草技术创新的契机弥合人才缺口。因此,本文提出了数字林草赋能风景园林人才培养的创新模式和实施路径,以数字技术为基础,开拓“数字”新思路,引导“资源”共享,探索“剧本”方案,促进产学研协同和劳动教育与创新创业教育的融合。数字林草赋能育人模式旨在培养出具有创新能力和实践技能的高素质风景园林人才,为数字林草技术的持续创新和生态环境的可持续发展做出重要贡献。

关键词：数字林草数字景观风景园林人才培养实践与创新

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单细胞蛋白质成像方法进展

中国药科大学学报 2024年第2期55卷 147-157页

作者：姚春露张惟杰张云龙邓朝霞王梦灵张左玲王琛宋沁馨邹秉杰中国药科大学药物质量与安全预警教育部重点实验室南京210009

单细胞蛋白质的差异化表达及其亚细胞定位同机体的生理状态和病理机制密切相关。单细胞蛋白质原位成像方法的发展为空间单细胞蛋白质组学研究以及单细胞蛋白图谱绘制提供了强有力的工具。本文对近几年开发的基于抗体有序多轮孵育的循环... 详细信息

单细胞蛋白质的差异化表达及其亚细胞定位同机体的生理状态和病理机制密切相关。单细胞蛋白质原位成像方法的发展为空间单细胞蛋白质组学研究以及单细胞蛋白图谱绘制提供了强有力的工具。本文对近几年开发的基于抗体有序多轮孵育的循环免疫荧光成像、基于金属元素标签抗体的质谱成像、基于抗体DNA条形码的荧光成像、基于基因编码的荧光蛋白成像、基于拉曼光谱或X射线的光谱成像等单细胞蛋白质成像方法进行了总结,并对它们的成像原理作简要说明。文章重点关注了这些方法的多重性能、成像分辨率以及信号放大性能,并分析了它们在实际科研和临床工作中的应用特点,希望为新的单细胞蛋白质成像方法的开发提供参考,并为生物医学和精准医学的发展提供助力。

关键词：单细胞蛋白质免疫荧光质谱成像荧光蛋白光谱成像进展

哈尔滨城市森林景观季节变化对地表温度影响的定量研究

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中国城市林业 2024年第1期22卷 34-42页

作者：丛丹王蕾贾佳翟雅琳张林萱姚允龙宁静东北林业大学园林学院哈尔滨150040 黑龙江省寒区园林植物种质资源开发与景观生态修复重点实验室哈尔滨150040 东北林业大学野生动物与自然保护地学院哈尔滨150040 东北农业大学公共管理与法学院哈尔滨150040

城市森林是平衡城市环境温度的自然解决方案,对降低城市热岛负面影响和发挥生态效益具有重要意义。文章利用地理信息技术提取春季、夏季和秋季城市森林景观和LST空间信息,探究不同季节城市森林景观指标对LST变化的最佳解释模型。结果表... 详细信息

城市森林是平衡城市环境温度的自然解决方案,对降低城市热岛负面影响和发挥生态效益具有重要意义。文章利用地理信息技术提取春季、夏季和秋季城市森林景观和LST空间信息,探究不同季节城市森林景观指标对LST变化的最佳解释模型。结果表明,不同季节城市森林景观组成指标与LST的相关性最为显著,但不同类型的林地景观与LST的相关关系和程度均存在差异。因此,丰富森林景观内部植被种类的多样性,增加城市森林斑块形状的复杂性,并联通单独的城森林景观斑块形成森林生态廊道,是最大限度发挥哈尔滨市城市森林景观调节LST效益的方法。

关键词：城市森林景观指数热岛效应地表温度

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中药调控痛风性关节炎相关信号通路研究进展

中国中医基础医学杂志 2024年第5期30卷 909-913页

作者：郭云龙谢兴文李鼎鹏李宁李辉黄委委姚乾宁杨浩东罗鹏飞甘肃中医药大学兰州730000 甘肃中医药大学附属医院兰州730000 西北民族大学附属医院兰州730030

痛风性关节炎(gouty arthritis,GA)是一种常见的炎症性关节疾病。随着我国饮食结构及生活方式渐趋多元化,痛风患病率在我国迅速攀升,引起了学者们的极大关注。目前临床治疗GA的主要目的是迅速缓解痛风所致疼痛及尽量减少由痛风强烈炎症... 详细信息

痛风性关节炎(gouty arthritis,GA)是一种常见的炎症性关节疾病。随着我国饮食结构及生活方式渐趋多元化,痛风患病率在我国迅速攀升,引起了学者们的极大关注。目前临床治疗GA的主要目的是迅速缓解痛风所致疼痛及尽量减少由痛风强烈炎症反应引起的身体残疾。非甾体类抗炎药和秋水仙碱通常被用作防治急性痛风发作的一线药物,但其治疗不能完全阻止GA的发展,并且长期服用有出血障碍、肝肾功能不全和胃肠道症状等不良反应。中医药治疗GA历史悠久,疗效显著,然而中药治疗痛风的具体机制尚不清楚,近年来众多学者基于GA发病的相关信号通路开展了大量研究,发现中药通过调控GA相关的NOD样受体热蛋白结构域相关蛋白(nod-like receptor thermal protein domain associated protein,NLRP)3信号通路、Toll样受体(toll-like receptor,TLRs)/核因子(nuclear factor,NF)-κB信号通路、丝裂原活化蛋白激酶(mitogen-activated protein kinases,MAPKs)信号通路、Janus激酶/信号转导和转录激活因子(janus kinase/signal transducers and activators of transcription,JAK/STAT)信号转导通路等,起到抑制炎症反应及降低血尿酸的作用,进而防治GA。本文主要综述了相关信号通路在痛风性关节炎发病机制中的作用及中药调控的研究成果,以期为中药作为可能的治疗选择提供参考和依据。

关键词：中药痛风性关节炎信号通路尿酸钠晶体

Degradation Diagnostics from the Subsurface of Lithium-Ion Battery Electrodes

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Energy & Environmental Materials 2022年第2期5卷 662-669页

作者： Xuhui yao Tomas Samoril JiriDluhos John F.Watts Zhijia Du Bohang Song SRavi P.Silva Tan Sui yunlong Zhao Advanced Technology Institute University of SurreyGuildford Surrey GU27XHUK TESCAN ORSAY HOLDING a.s.Libusina tr.21Brno 62300Czech Republic Department of Mechanical Engineering Sciences University of SurreyGuildford Surrey GU27XHUK Energy and Transportation Science Division Oak Ridge National LaboratoryOak Ridge TN 37830USA Neutron Scattering Division Oak Ridge National LaboratoryOak Ridge TN 37830USA National Physical Laboratory Teddington Middlesex TW110LWUK

Despite the long-established rocking-chair theory of lithium-ion batteries(LIBs),developing novel characterization methodology with higher spatiotemporal resolution facilitates a better understanding of the solid electrolyte interphase studies to shape the reaction mechanisms.In this work,we develop a Xenon ion plasma focused ion beam(Xe+PFIB)-based characterization technique to probe the cross-sectional interface of both ternary cathode and graphite anode electrodes,with the focus on revealing the chemical composition and distribution underneath the electrode surface by in-depth analysis of secondary ions.Particularly,the lithium fluoride is detected in the pristine cathode prior to contact with the electrolyte,reflecting that the electrode degradation is in the form of the loss of lithium inventory during electrode preparation.This degradation is related to the hydrolysis of the cathode material and the decomposition of the PVDF binder.Through the quantitative analysis of the transition-metal degradation products,manganese is found to be the dominant element in the newly formed inactive fluoride deposition on the cathode,while no transition metal signal can be found inside the anode electrode.These insights at high resolution implemented via a PFIB-based characterization technique not only enrich the understanding of the degradation mechanism in the LIBs but also identify and enable a high-sensitivity methodology to obtain the chemical survey at the subsurface,which will help remove the capacity-fade observed in most LIBs.

关键词： degradation lithium-ion battery mass spectrometry plasma focused ion beam subsurface

Haze Control by Industrialization:A Win-win Mode of Ecological Civilization and Economic Development

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Asian Agricultural Research 2017年第2期9卷 66-71页

作者： Yan HAN Qingyu CHAI Lei WANG yunlong yao Yunna JIA Jiahui SHAO Hongxian YU Fangying CHAI Shunde Entry-Exit Inspection and Quarantine Bureau Northeast Forestry University Heilongjiang University of Science and Technology Department of Water Resources of Heilongjiang Province

Haze control is a difficult and arduous battle,and it is a major decision concerning the people's livelihood and national ecological civilization construction.Taking Heilongjiang Province as an example,this paper introduced a new idea for haze control.Haze in Heilongjiang Province was mainly resulted from straw burning.Market-oriented,large-scale,and industrialized haze control relying on science and technology is new opportunity and challenge for realizing ecological civilization and revitalizing the economy of Heilongjiang Province.

关键词： Haze Control Industrialization

Determination of paraquat in water samples using a sensitive fluorescent probe titration method

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Journal of Environmental Sciences 2013年第6期25卷 1245-1251页

作者： Feihu yao Hailong Liu Guangquan Wang Liming Du Xiaofen Yin yunlong Fu Analytical and Testing Center Shanxi Normal University

Paraquat （PQ）, a nonselective herbicide, is non-fluorescent in aqueous solutions. Thus, its determination through direct fluorescent methods is not feasible. The supramolecular inclusion interaction of PQ with cucurbit[7]uril was studied by a fluorescent probe titration method. Significant quenching of the fluorescence intensity of the cucurbit[7]uril-coptisine fluorescent probe was observed with the addition of PQ. A new fluorescent probe titration method with high selectivity and sensitivity at the ng/mL level was developed to determine PQ in aqueous solutions with good precision and accuracy based on the significant quenching of the supramolecular complex fluorescence intensity. The proposed method was successfully used in the determination of PQ in lake water, tap water, well water, and ditch water in an agricultural area, with recoveries of 96.73% to 105.77%. The fluorescence quenching values （AF） showed a good linear relationship with PQ concentrations from 1.0 × 10^-8 to 1.2× 10^-5 mol/L with a detection limit of 3.35 x 10-9 mol/L. In addition, the interaction models of the supramolecular complexes formed between the host and the guest were established using theoretical calculations. The interaction mechanism between the cucurbit[7]uril and PQ was confirmed by 1H NMR spectroscopy.

关键词： paraquat coptisine cucurbituril supramolecular interaction fluorescent probe titration