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Investigation of the seismic behavior of grouted sandy gravel foundations using shaking table tests

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Frontiers of Structural and Civil Engineering 2022年第9期16卷 1196-1211页

作者： tiancheng wang Yu LIANG Xiaoyong ZHANG Zhihuan RUAN Guoxiong MEI Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education College of Civil Engineering and ArchitectureGuangxi UniversityNanning 530004China Ocean College Zhejiang UniversityZhoushan 316021China

Sandy gravel foundations exhibit non-linear dynamic behavior when subjected to strong ground motions,which can have amplification effects on superstructures and can reveal insufficient lateral resistance of *** methods can be used to improve the seismic performance of natural sandy gravel *** strength and stiffness of grouted sandy gravel foundations are different from those of natural foundations,which have unknown earthquake *** studies have investigated the seismic behavior of sandy gravel foundations before and after *** this study,two shaking table tests were performed to evaluate the effect of grouting reinforcement on seismic *** natural frequency,acceleration amplification effect,lateral displacement,and vertical settlement of the non-grouted and grouted sandy gravel foundations were measured and ***,the dynamic stress-strain relationships of the two foundations were obtained by a linear inversion method to evaluate the seismic energy *** test results indicated that the acceleration amplification,lateral displacement amplitude,and vertical settlement of the grouted sandy gravel foundation were lower than that of the non-grouted foundation under low-intensity ***,a contrasting result was observed under high-intensity *** demonstrated that different grouting reinforcement strategies are required for different sandy gravel *** addition,the dynamic stress-strain relationship of the two foundations exhibited two different energy dissipation *** results provide insights relating to the development of foundations for relevant engineering sites and to the dynamic behavior of grouted foundations prior to investigating soil-structure interaction problems.

关键词： sandy gravel foundation grouting-treated reinforcement shaking table test seismic behavior

Method for the measurement of triboelectric charge transfer at solid–liquid interface

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Friction 2023年第8期11卷 1544-1556页

作者： Qin CHEN Bingxue CHENG tiancheng wang Hongfei SHANG Tianmin SHAO State Key Laboratory of Tribology in Advanced Equipment Tsinghua UniversityBeijing 100084 China

Triboelectrification between a liquid and a solid is a common phenomenon in our daily life and *** charges generated at liquid/solid interfaces have effects on energy harvesting,triboelectrification-based sensing,interfacial corrosion,wear,lubrication,*** the amount of triboelectric charge transfer is very useful for studying the mechanism and controlling these phenomena,in which an accurate method is absolutely necessary to measure the triboelectric charge generated at the solid–liquid ***,we established a method for measuring the charge transfer between different solids and *** equipment based on the Faraday cup measurement was developed,and the leakage ratio(r_(l))was quantified through simulation based on an electrostatic field *** experiments were conducted to validate the reliability of the *** work provides an effective method for charge measurement in triboelectrification research.

关键词： triboelectric charge solid-liquid interface measurement Faraday cup leakage ratio(r_(l))

Astroglial glutamate-glutamine cycle is involved in the modulation of inflammatory nociception in rats

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Neural Regeneration Research 2011年第35期6卷 2746-2750页

作者： tiancheng wang Jing wang Bin Geng Hongyu Guo Haili Shen Yayi Xia Department of Neurology Second Hospital of Lanzhou University Lanzhou University Lanzhou 730030 Gansu Province China Institute of Orthopedics Second Hospital of Lanzhou University Lanzhou University Lanzhou 730030 Gansu Province China Department of Obstetrics and Gynecology Second Hospital of Lanzhou University Lanzhou University Lanzhou 730030 Gansu Province China Department of Pain Second Hospital of Lanzhou University Lanzhou University Lanzhou 730030 Gansu Province China

Our previous behavioral studies have indicated that the astroglial glutamate-giutamine cycle is involved in the process of formalin-induced spinal cord central sensitization, but there was little morphological evidence. In this study, double-labeling immunofluorescence techniques showed that after rats were intrathecally injected with PBS and plantarly injected with formalin, glial fibrillary acidic protein （GFAP） and glutamine synthesase （GS） expression were increased and GFAP/GS coexpression was changed to include layers III and IV. After intrathecal injection of methionine sulfoximine, a GS specific inhibitor, the formalin-induced change in expression and coexpression of GFAP and GS in spinal cord dorsal horns was inhibited. The morphology, distribution and quantity of astrocytes recovered to normal levels. An intrathecal glutamine injection reversed the inhibitory effect of methionine sulfoximine. Astrocytes showed significant activation and distribution extended to layers V and VI. The present study provides morphological evidence that the astroglial glutamateglutamine cycle is involved in the process of formalin-induced spinal cord central sensitization.

关键词： astrocyte glutamate-glutamine cycle central sensitization immunohistochemistry

Deciphering protective genomic factors of tumor development in pediatric Down syndrome via deep learning approach to whole genome and RNA sequencing

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Cancer Communications 2024年第11期44卷 1374-1378页

作者： Yichuan Liu Hui-Qi Qu Xiao Chang Frank D Mentch Haijun Qiu Kenny Nguyen Kayleigh Ostberg tiancheng wang Joseph Glessner Hakon Hakonarson Center for Applied Genomics Children’s Hospital of PhiladelphiaPhiladelphiaPennsylvaniaUSA Department of Pediatrics The Perelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPennsylvaniaUSA Division of Human Genetics Children’s Hospital of PhiladelphiaPhiladelphiaPennsylvaniaUSA Division of Pulmonary Medicine Children’s Hospital of PhiladelphiaPhiladelphiaPennsylvaniaUSA Faculty of Medicine University of IcelandReykjavikIceland

Childhood solid tumors represent a significant public health challenge worldwide,with approximately 15,000 new cases annually in the United States and an estimated 300,000 *** syndrome(DS),a genetic disorder characterized by an extra full or partial copy of chromosome 21,results in distinctive developmental and physical ***,individuals with DS exhibit a remarkable resilience against solid tumors compared to the general population,with an overall standardized incidence ratio(SIR)of 0.45,despite their increased susceptibility to hematologic malignancies[1].This paradoxical observation has spurred extensive research aimed at uncovering the biological underpinnings of this natural resistance to solid *** theories suggest that the overexpression of specific genes on chromosome 21 may confer protective benefits(***1 contributes to antiangiogenic effects),and alterations in immune system function may enhance apoptosis and DNA repair pathways in individuals with trisomy 21 DS[2].

关键词： protective alterations Down

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嵌入磁路的电解加工技术

机械工程学报 2006年第2期42卷 96-100页

作者：范植坚马保吉王天诚西安工业学院机电学院西安710032

为提高电解加工精度,基于磁场和电场相互作用原理,设计了两种镶嵌磁路的阴极。分析了磁场对双电层液相3种传质方式的影响,提出将多极内封闭渐变磁路和多极外封闭渐变磁路组合后嵌入电解加工装置的方法。试验表明,沿阴极体周边均匀镶贴... 详细信息

为提高电解加工精度,基于磁场和电场相互作用原理,设计了两种镶嵌磁路的阴极。分析了磁场对双电层液相3种传质方式的影响,提出将多极内封闭渐变磁路和多极外封闭渐变磁路组合后嵌入电解加工装置的方法。试验表明,沿阴极体周边均匀镶贴永磁体的阴极,加工时磁力线与电解液流动方向正交,可消除分股束流、空穴, 改善电解加工流场,改善工件表面粗糙度;顺阴极轴向在阴极头内嵌入永磁体,加强了反应物质向加工区传质的速度,提高了集中蚀除的能力,可有效减轻杂散腐蚀。对电解套料沿阴极内壁采用多极内封闭渐变磁路镶贴永磁体;对非铁异形孔加工,为进一步加强间隙磁场,可采用在阴极外表面镶嵌多极外封闭渐变磁路,在工件外套一多极内封闭渐变磁路形成组合磁场。

关键词：电解加工磁场传质杂散腐蚀

纯粹“立知”的观念与科学精神--从中西方不同致思取向说起

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社会科学辑刊 2009年第1期 4-9页

作者：王天成吉林大学哲学基础理论研究中心吉林大学哲学社会学院

与"立人"相区别的"立知"取向、在实践理性和理论理性区分前提下的纯粹立知态度和求真精神以及与实践方法自觉相区别的立知方法,是西方纯粹立知观念的三个相互联系的支点,也构成西方科学精神中的重要因素。由于中国传统文化中"立人"的致... 详细信息

与"立人"相区别的"立知"取向、在实践理性和理论理性区分前提下的纯粹立知态度和求真精神以及与实践方法自觉相区别的立知方法,是西方纯粹立知观念的三个相互联系的支点,也构成西方科学精神中的重要因素。由于中国传统文化中"立人"的致思取向和西方传统文化中"立知"的致思取向尖锐对立,使我们很容易忽视或误解这些观念,这会直接影响我们对科学的反思,进而阻碍中华民族科学精神的形成。

关键词： “立人” “立知” 纯粹立知的观念科学精神立知方法

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黑格尔概念辩证法中的个体生命原则

天津社会科学 2005年第2期 19-23页

作者：王天成吉林大学哲学基础理论研究中心

人们往往将黑格尔概念辩证法体系和活生生的个体生命原则对立起来,甚至认为他以概念的普遍性扼杀了生命的个体性。这实际上是一种误解。黑格尔在对概念自身发展的描述中已经将概念提升到了一种活生生的个体生命原则。这个提升过程主要... 详细信息

人们往往将黑格尔概念辩证法体系和活生生的个体生命原则对立起来,甚至认为他以概念的普遍性扼杀了生命的个体性。这实际上是一种误解。黑格尔在对概念自身发展的描述中已经将概念提升到了一种活生生的个体生命原则。这个提升过程主要经历了两个重要阶段:第一个阶段可称为概念的自我化;第二个阶段可称为自我的个体化和生命化。经过这两个阶段的发展。

关键词：概念原则个体生命阶段辩证法实际自身发展黑格尔自我个体性

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磁场辅助电解加工装置的磁场设计和试验

机械工程学报 2010年第1期46卷 194-198页

作者：范植坚王岗罡唐霖王天诚西安工业大学机电工程学院西安710032 中国人民解放军驻211厂军代室北京100076

为改善电解加工间隙流场,针对型面和型孔电解加工,设计在夹具体内镶嵌磁路、在阴极体侧镶贴永磁体的电解加工装置。进行有限元分析和试验,确定型面加工采用内封闭多体渐变磁路的结构。试验结果,用3坐标测量仪对加工的曲面尺寸进行测量,... 详细信息

为改善电解加工间隙流场,针对型面和型孔电解加工,设计在夹具体内镶嵌磁路、在阴极体侧镶贴永磁体的电解加工装置。进行有限元分析和试验,确定型面加工采用内封闭多体渐变磁路的结构。试验结果,用3坐标测量仪对加工的曲面尺寸进行测量,曲面形状偏差小于0.05mm,用轮廓仪测得表面粗糙度为Ra0.2μm。型孔加工采用N、S相间排布的磁路,可有效消除加工后的侧壁流纹,表面粗糙度为Ra0.8μm。与不加磁场相比,复制精度和表面粗糙度均显著提高的原因是磁力线切割流线,洛仑兹力起到消除束流的作用。

关键词：型面电解加工型孔电解加工磁场流场

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推断岩土参数概率分布的二维正态信息扩散法

岩石力学与工程学报 2018年第10期37卷 2232-2242页

作者：宫凤强黄天朗王天成中南大学资源与安全工程学院湖南长沙410083

提出推断岩土参数概率分布的二维正态信息扩散法。基于正态信息扩散原理,并考虑二维岩土参数的相关性,建立了二维正态信息扩散法模型的一般表达形式。结合K-S检验法的原理和二维岩土参数的分布特点,提出了一种改进的二维分布K-S检验法... 详细信息

提出推断岩土参数概率分布的二维正态信息扩散法。基于正态信息扩散原理,并考虑二维岩土参数的相关性,建立了二维正态信息扩散法模型的一般表达形式。结合K-S检验法的原理和二维岩土参数的分布特点,提出了一种改进的二维分布K-S检验法和具体的检验步骤。以某水电站工程中的二维抗剪强度参数作为实例,利用二维正态分布和二维正态信息扩散分布对实际数据的分布进行了拟合比较,并利用二维K-S检验方法进行了检验。研究结果表明,二维正态信息扩散分布的检验值要低于二维正态分布的检验值,二维正态信息扩散分布函数更加接近实际数据的分布,表明二维正态信息扩散分布在描述岩土参数概率分布方面更有优势。研究结果也表明,二维正态信息扩散函数的边缘分布同样服从一维正态信息扩散分布,并且其精度同样比一维正态分布高。

关键词：岩土工程二维岩土参数概率分布正态信息扩散正态分布边缘分布相关系数