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Improving the Unconfined Compressive Strength of Red Clay by Combining Biopolymers with Fibers

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Journal of Renewable Materials 2021年第8期9卷 1503-1517页

作者： Zhiyu Weng Lina Wang Qiang Liu xuemin Pan yonghao xu Jing Li School of Construction Engineering Yunnan Agricultural UniversityKunming650201China Powerchina Kunming Engineering Corporation Limited Kunming650051China South-West Survey and Design Group Company Limited Kunming650200China

To explore an environmentally friendly improvement measure for red clay,the function and mechanism of xanthan gum biopolymer and polypropylene fibers on the strength properties of red clay were investigated by unconfined compressive strength and scanning electron microscopy *** test results demonstrated that the contents and curing ages of xanthan gum had significant influences on the unconfined compressive strength of red *** with untreated soil,1.5%xanthan gum content was the optimal ratio in which the strength increment was between 41.52 kPa and 64.73 *** the other hand,the strength of xanthan gum-treated red clay increased,whereas the ductility decreased with the increase in curing ages,indicating that the xanthan gum-treated red clay started to gradually consolidate after 3 days of curing and stiffness significantly improved between 7 and 28 days of *** results also showed that the synergistic consolidation effects of the xanthan gum–polypropylene fibers could not only effectively enhance the strength of red clay but also reduce the brittle failure *** strengths of soil treated with 2.0%xanthan gum-polypropylene fibers were 1.9–2.41 and 1.12–1.47 times than that of red clay and 1.5%xanthan gum-treated clay,*** results of study provide the related methods and experiences for the field of ecological soil treatment.

关键词： Biopolymer xanthan gum polypropylene fiber red clay micro-mechanism unconfined compressive strength

A periodic DFT study on adsorption of small molecules(CH4,CO,H2O,H2S,NH3)on the WO3(001) surface-supported Au

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Communications in Theoretical Physics 2020年第3期72卷 69-82页

作者： Long Lin Jingtao Huang Weiyang Yu Chaozheng He Hualong Tao yonghao xu Linghao Zhu Pengtao Wang Zhanying Zhang Cultivating Base for Key Laboratory of Environment-Friendly Inorganic Materials in Henan Province School of Materials Science and EngineeringHenan Polytechnic UniversityJiaozuo 454000China School of Mathematics and Informatics Henan Polytechnic UniversityJiaozuo 454000China School of Physics and Electronic Information Engineering Henan Polytechnic UniversityJiaozuo 454000China Institute of Environmental and Energy Catalysis School of Materials Science and Chemical EngineeringXi’an Technological UniversityXi’anShaanxi 710021China Liaoning Key Materials Laboratory for Railway School of Materials Science and EngineeringDalian Jiaotong UniversityDalian 116028Liaoning ProvinceChina

Gas molecules(such as CH4,CO,H2O,H2S,NH_3)adsorption on the pure and Au-doped WO3(001)surface have been studied by Density functional theory calculations with generalized gradient *** on the the calculation of adsorption energy,we found the most stable adsorption site for gas molecules by comparing the adsorption energies of different gas molecules on the WO3(001)*** have also compared the adsorption energy of five different gas molecules on the WO3(001)surface,our calculation results show that when the five kinds of gases are adsorbed on the pure WO3(001)surface,the order of the surface adsorption energy is CO>H2S>CH4>H2O>*** the results show that NH3 is the most easily adsorbed gas among the other four gases adsorbed on the surface of pure WO3(001)*** also calculated the five different gases on the Au-doped WO3(001)*** order of adsorption energy was found to be different from the previous calculation:CO>CH4>H2S>H2O>*** results provide a new route for the potential applications of Au-doped WO3 in gas molecules adsorption.

关键词： WO3 gas molecules adsorption density functional theory

Tunable and low bending loss of liquid-core fiber

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Chinese Optics Letters 2010年第1期8卷 14-17页

作者：戴芬芬许永豪陈险峰 Department of Physics the State Key Laboratory on Fiber Optic Local Area Communication Networks and Advanced Optical Communication SystemsShanghai Jiao Tong University

The liquid-core fiber with relatively high refractive index difference between the core and cladding is proven to be bending insensitive. The single mode condition and bending loss of the fiber with a mixture of toluene and chloroform as its core material are studied. The results show that the bending loss of this fiber is not only much smaller than the conventional silica single mode fiber but also can be tuned by the temperature and liquid mixture ratio. This kind of fiber may find its potential applications in all-optical network.

关键词： Coremaking Fiber optic networks Liquids Refractive index Silica Single mode fibers Toluene

基于整体式反应位移法的无柱中庭地铁车站抗震研究

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现代隧道技术 2022年第6期59卷 77-85页

作者：徐永浩中铁四院集团西南勘察设计有限公司昆明650200

无柱中庭式地铁车站作为一种新型车站结构形式,去除了中柱并在中板设置开孔以扩大有效空间,提高换乘效率。为研究无柱中庭式地铁车站在地震作用下的响应特点,采用适用于复杂断面地下结构的整体式反应位移法进行拟静力抗震分析,对比具有... 详细信息

无柱中庭式地铁车站作为一种新型车站结构形式,去除了中柱并在中板设置开孔以扩大有效空间,提高换乘效率。为研究无柱中庭式地铁车站在地震作用下的响应特点,采用适用于复杂断面地下结构的整体式反应位移法进行拟静力抗震分析,对比具有相同断面形状的大跨度无柱中庭式车站、一般有柱车站和无柱车站的内力分布情况。结果表明,相同断面形状情况下,大跨度无柱中庭式车站的轴力、剪力、弯矩在整体上都要大于无柱车站与一般有柱车站的轴力、剪力、弯矩;底板与侧墙连接处是无柱中庭车站的薄弱部位,中板与侧墙连接处相较传统车站也更为不利。

关键词：地铁整体式反应位移法无柱中庭车站抗震分析

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玻璃纤维土钉墙在地铁基坑支护中的应用

城市轨道交通研究 2014年第4期17卷 113-116页

作者：徐永浩中铁四院集团西南勘察设计有限公司昆明工程师650206

针对传统钢筋土钉墙支护存在钢筋残留、影响基坑周边桩基础施工的问题,提出了玻璃纤维土钉墙支护方案。以昆明南站站的地铁基坑支护为背景,以普通土钉墙支护设计理论为依据,对玻璃纤维土钉的材料特性、设计计算方法作了较详细的论述。... 详细信息

针对传统钢筋土钉墙支护存在钢筋残留、影响基坑周边桩基础施工的问题,提出了玻璃纤维土钉墙支护方案。以昆明南站站的地铁基坑支护为背景,以普通土钉墙支护设计理论为依据,对玻璃纤维土钉的材料特性、设计计算方法作了较详细的论述。通过与传统土钉墙的综合对比,论证了该方案的经济技术合理性,提出了对应玻璃纤维筋土钉的构造要求及施工注意事项,并成功指导施工,可为类似基坑支护工程设计提供参考。

关键词：地铁基坑支护玻璃纤维土钉墙

Identification of differentially expressed genes and signaling pathways in neutrophils during sepsis-induced immunosuppression via bioinformatics analysis

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Chinese Medical Journal 2022年第17期135卷 2131-2133页

作者： Yongxin Zheng Zhihui Zhang Yongbo Huang Jinping Wang Ling Sang yonghao xu Xiaoqing Liu Yimin Li Department of Pulmonary and Critical Care Medicine State Key Laboratory of Respiratory DiseasesGuangzhou Institute of Respiratory HealthThe First Affiliated Hospital of Guangzhou Medical UniversityGuangzhouGuangdong 510000China Department of Cardiovascular Medicine The First Affiliated Hospital of Guangzhou Medical UniversityGuangzhouGuangdong 510000China

To the Editor:Sepsis is a life-threatening organ dysfunction caused by a dysregulated host response to *** deeply perturbs immune homeostasis,and impairs innate and adaptive immunity by directly altering the lifespan,... 详细信息

关键词： homeostasis immunity analysis

面向高光谱遥感影像分类的深度学习与对抗防御方法研究

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武汉大学学报（信息科学版） 2022年第1期47卷 157-157页

作者：徐永浩武汉大学测绘遥感信息工程国家重点实验室湖北武汉430079

随着成像光谱技术的日益成熟,高光谱遥感正在向高光谱分辨率、高空间分辨率、高时间分辨率的方向快速发展。与此同时,大量高光谱遥感卫星的成功发射,使高光谱遥感影像的数据量进一步呈现出爆炸性式增长的趋势。面对如此海量的高光谱遥... 详细信息

随着成像光谱技术的日益成熟,高光谱遥感正在向高光谱分辨率、高空间分辨率、高时间分辨率的方向快速发展。与此同时,大量高光谱遥感卫星的成功发射,使高光谱遥感影像的数据量进一步呈现出爆炸性式增长的趋势。面对如此海量的高光谱遥感数据,现有的分类技术难以满足快速、精准、自动化的影像解译需求。

关键词：高光谱遥感高时间分辨率高空间分辨率高光谱分辨率深度学习影像解译成像光谱技术自动化

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基于单目结构光的形貌测量误差补偿方法研究

仪器仪表学报 2020年第5期41卷 19-31页

作者：李茂月马康盛许勇浩王飞哈尔滨理工大学机械动力工程学院哈尔滨150080

基于单目结构光的重构测量技术,因具有精度高、成本低等优点,在现代测量领域尤其是具有一定曲面特征的中小型低反光零部件测量方面得到广泛应用,而测量误差是测量精度的重要影响因素。首先,根据所搭建的单目结构光重构测量系统,对影响... 详细信息

基于单目结构光的重构测量技术,因具有精度高、成本低等优点,在现代测量领域尤其是具有一定曲面特征的中小型低反光零部件测量方面得到广泛应用,而测量误差是测量精度的重要影响因素。首先,根据所搭建的单目结构光重构测量系统,对影响测量精度的主要误差来源进行分析,通过对硬件设备参数的合理设置与调节,来保证所采集结构光图片的质量。然后,为提高投影出结构光的正弦性,提出一种可降低普通投影仪gamma非线性响应的简易方法。最后,提出一种基于圆形标定板的张正友优化标定算法来提高系统的标定精度。实验结果表明,重构测量出的中小型曲面件表面点云数据的精度在0.3~0.6 mm之间,对被测物体表面的单次投影重构测量时间在2 min内,验证补偿方法有效可行。

关键词：误差补偿结构光形貌测量非线性响应优化标定算法

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中国A股市场的“大单异象”研究

管理世界 2022年第7期38卷 120-132页

作者：许泳昊徐鑫朱菲菲中南财经政法大学金融学院广东财经大学金融学院中央财经大学金融学院

基于中国A股市场单笔交易不低于10万股的股票交易数据,本文发现一类全新的定价异象——“大单异象”,即股票在当月的大单净买量与其下个月的预期收益率之间存在明显的负相关关系,基于该异象构造的多空组合可实现年化20%的收益。此外,在... 详细信息

基于中国A股市场单笔交易不低于10万股的股票交易数据,本文发现一类全新的定价异象——“大单异象”,即股票在当月的大单净买量与其下个月的预期收益率之间存在明显的负相关关系,基于该异象构造的多空组合可实现年化20%的收益。此外,在市值规模较小、机构投资者持股比例更低、分析师关注较少以及卖空交易较不活跃的股票中,该异象更为显著。最后,本文基于某券商的微观账户数据和RESSET高频交易数据对大单异象存在的原因进行了解释。我们发现投资者的羊群行为与中小散户对大单交易的过度反应是导致大单异象存在的重要原因。本文的研究对于提升我国资本市场定价效率、改善金融市场投资环境和保护投资者权益均具有一定的启示意义。

关键词：大单交易资产定价异象羊群行为过度反应