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纤维素纤维加筋土的力学特性

公路交通科技 2018年第1期35卷 22-27,35页

作者：胡达璩继立上海理工大学土木工程学院上海200093

为提高上海地区黏土的工程特性,采用纤维素纤维改良黏土的方法,通过击实试验、直接剪切试验和无侧限抗压强度试验,来探究不同加筋条件下纤维素纤维对上海黏土的最优含水率、最大干密度、抗剪强度以及抗压强度等力学特性的影响。试验结... 详细信息

为提高上海地区黏土的工程特性,采用纤维素纤维改良黏土的方法,通过击实试验、直接剪切试验和无侧限抗压强度试验,来探究不同加筋条件下纤维素纤维对上海黏土的最优含水率、最大干密度、抗剪强度以及抗压强度等力学特性的影响。试验结果表明:纤维素纤维可增大黏土的最大干密度,减小黏土的最优含水量,且随着纤维加筋率和含水率的增大,影响逐渐降低。与素土相比,纤维素纤维加筋土的抗剪强度明显增强,最优加筋率为0.6%。当纤维素纤维加筋率低于0.6%时,不同垂直荷载下的抗剪强度均随着纤维含量的增加而提高,当纤维素纤维加筋率高于0.6%时,加筋土的抗剪强度则逐渐下降。直接剪切试验中,垂直荷载为50 k Pa和100 k Pa时,多数应力应变曲线呈现应变软化型;150 k Pa和200 k Pa时,多数应力应变曲线呈现应变硬化型。当纤维素纤维加筋率为0.6%时,纤维素纤维可明显提高黏土的抗压强度,纤维加筋率过高时,纤维素纤维对黏土无侧限抗压强度的影响减弱。纤维素纤维可增强黏土整体性、受外力作用时的稳定性,纤维加筋率过高时,抗压强度和抵抗变形的能力减小。由此说明,纤维素纤维可在一定程度上增强黏土的密实度、抗剪强度和抗压强度,优化黏土破坏形态。同时,过量的纤维素纤维将引起反作用。

关键词：道路工程纤维素纤维直接剪切试验抗剪强度加筋土无侧限抗压强度

Oxidation behavior of Ni-based superalloy GH4738 under tensile stress

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Rare Metals 2024年第8期43卷 3913-3920页

作者： ji-Chong Hu Hai-Liang Huang Chong-Chong Wu Xiao-Yu Sun jie Wang Yan-Hong Yang jing-Long qu Liang jiang jin-He Dou Yang Chen Institute for Advanced Studies in Precision Materials Yantai UniversityYantai 264005China Department of Management and Engineering Linkoping University58183LinkopingSweden Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang110016China Gaona Aero Material Co. LtdBeijing 100081China College of Artificial Intelligence and Big Data Shandong First Medical University and Shandong Academy of Medical SciencesJinan250117China

Revealing the oxidation behavior of superalloys is crucial for optimizing material properties and extending service *** study investigated the oxidation behavior of superalloy GH4738 under stress states at 850℃.High-throughput specimens were fabricated to withstand different stresses at the same *** oxidation s amples were analyzed using the mass gain method to obtain oxidation kinetic *** results show that the external stress below 200 MPa could improve the oxidation resistance of the *** tensile stress increasing,the oxide layer becomes thinner,denser and more complete,while internal oxidation *** tensile stress alters the structure of the external oxide layer from a two-layer to a threelayer *** Cr_(2)O_(3) oxide layer inhibits the outward diffusion of Ti,leading to Ti enrichment at the oxide-matrix interface and altering the oxidation mechanism of GH4738.

关键词： Ni-based Superalloy Oxidation behavior Tensile stress Oxide layer

Multimodal Omics Approaches to Aging and Age‑Related Diseases

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Phenomics 2024年第1期4卷 56-71页

作者： Qianzhao ji Xiaoyu jiang Minxian Wang Zijuan Xin Weiqi Zhang jing qu Guang‑Hui Liu State Key Laboratory of Membrane Biology Instituteof ZoologyChinese Academy of SciencesBeijing 100101China State Key Laboratory of Stem Cell and ReproductiveBiology Institute of ZoologyChinese Academy of SciencesBeijing 100101China Key Laboratory of Organ Regeneration and Reconstruction Institute of ZoologyChinese Academy of SciencesBeijing 100101China CAS Key Laboratory of Genomic and Precision Medicine Beijing Institute of GenomicsChinese Academyof Sciences and China National Center for BioinformationBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Institute for Stem Cell and Regeneration Chinese Academyof SciencesBeijing 100101China Beijing Institute for Stem Cell and Regenerative Medicine Beijing 100101China School of Future Technology University of ChineseAcademy of SciencesBeijing 100190China Advanced Innovation Center for Human Brain Protection National Clinical Research Center for GeriatricDisordersXuanwu Hospital Capital Medical UniversityBeijing 100053China Aging Translational Medicine Center International Centerfor Aging and CancerXuanwu HospitalCapital MedicalUniversityBeijing 100053China

Aging is associated with a progressive decline in physiological capacities and an increased risk of aging-associated *** increasing body of experimental evidence shows that aging is a complex biological process coordinately regulated by multiple factors at diferent molecular ***,it is difcult to delineate the overall systematic aging changes based on single-layer ***,multimodal omics approaches,in which data are acquired and analyzed using complementary omics technologies,such as genomics,transcriptomics,and epigenomics,are needed for gaining insights into the precise molecular regulatory mechanisms that trigger *** recent years,multimodal omics sequencing technologies that can reveal complex regulatory networks and specifc phenotypic changes have been developed and widely applied to decode aging and age-related *** review summarizes the classifcation and progress of multimodal omics approaches,as well as the rapidly growing number of articles reporting on their application in the feld of aging research,and outlines new developments in the clinical treatment of age-related diseases based on omics technologies.

关键词： Multimodal omics approaches Aging Genome Epigenome

Genetic analysis and candidate gene identification of salt tolerancerelated traits in maize

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Journal of Integrative Agriculture 2024年第7期23卷 2196-2210页

作者： Hui Fang Xiuyi Fu Hanqiu Ge Mengxue jia jie ji Yizhou Zhao Zijian qu Ziqian Cui Aixia Zhang Yuandong Wang Ping Li Baohua Wang Scientific Observing and Experimental Station of Maize in Plain Area of Southern Region Ministry of Agriculture and Rural Affairs/School of Life SciencesNantong UniversityNantong 226019China Maize Research Institute Beijing Academy of Agriculture and Forestry Sciences(BAAFS)Beijing 100097China

Soil salinization poses a threat to maize production worldwide,but the genetic mechanism of salt tolerance in maize is not well ***,identifying the genetic components underlying salt tolerance in maize is of great *** the current study,a teosinte-maize BC2F7 population was used to investigate the genetic basis of 21 salt tolerance-related *** total,125 QTLs were detected using a high-density genetic bin map,with one to five QTLs explaining 6.05–32.02%of the phenotypic variation for each *** total phenotypic variation explained(PVE)by all detected QTLs ranged from 6.84 to 63.88%for each *** all 125 QTLs,only three were major QTLs distributed in two genomic regions on chromosome 6,which were involved in three salt tolerance-related *** addition,10 pairs of epistatic QTLs with additive effects were detected for eight traits,explaining 0.9 to 4.44%of the phenotypic ***,18 QTL hotspots affecting 3–7 traits were *** one hotspot(L5),a gene cluster consisting of four genes(ZmNSA1,SAG6,ZmCLCg,and ZmHKT1;2)was found,suggesting the involvement of multiple pleiotropic ***,two important candidate genes,Zm00001d002090 and Zm00001d002391,were found to be associated with salt tolerance-related traits by a combination of linkage and marker-trait association ***00001d002090 encodes a calcium-dependent lipid-binding(CaLB domain)family protein,which may function as a Ca^(2+)sensor for transmitting the salt stress signal downstream,while Zm00001d002391 encodes a ubiquitin-specific protease belonging to the C19-related *** findings provide valuable insights into the genetic basis of salt tolerance-related traits in maize and a theoretical foundation for breeders to develop enhanced salt-tolerant maize varieties.

关键词： maize salt tolerance-related traits QTL mapping region-based association analysis

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西方语言哲学视阈下的濒危语言保护

青海民族研究 2012年第4期23卷 144-148页

作者：瞿继勇陕西师范大学陕西西安710062 吉首大学湖南吉首416000

语言的濒危与消亡是当今世界突出的一种文化现象,针对语言濒危的严峻形式,西方语言哲学思想中的"意义观"、"语言观"和"人文观"对濒危语言的保护有重要的启示意义。

关键词：濒危语言西方语言哲学意义观语言观人文观

基于特征的模糊神经网络遥感图像目标分类识别

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遥感学报 2009年第1期13卷 67-74页

作者：瞿继双瞿松柏王自杰第二炮兵装备研究院北京100085

特征是图像处理中用于辨识目标的最基本属性。提出了利用模糊神经网络方法,针对舰船的几何特征、矩特征和纹理特征进行舰船目标识别处理。首先简单地描述了几何特征、矩特征尤其是Hu矩特征、一阶纹理特征和二阶纹理特征。然后分别对仿... 详细信息

特征是图像处理中用于辨识目标的最基本属性。提出了利用模糊神经网络方法,针对舰船的几何特征、矩特征和纹理特征进行舰船目标识别处理。首先简单地描述了几何特征、矩特征尤其是Hu矩特征、一阶纹理特征和二阶纹理特征。然后分别对仿真数据、卫星观测数据中的舰船目标,以及自动检测处理获取的舰船目标的几何特征、Hu机特征和纹理特征进行了提取和分析。模糊神经网络方法可以综合模糊集理论和神经网络方法的优势,有效地实现基于特征的图像目标分类识别处理。文章首先描述了一种主从神经元结构的模糊神经网络分类识别方法,然后利用该方法对大型舰船进行分类识别,包括基于单类舰船特征的分类识别和基于多源(时相)数据融合的分类识别。实验结果表明,基于大型舰船的几何特征、矩特征和纹理特征,利用模糊神经网络方法可以实现对大型舰船目标的有效分类识别。通过多源数据融合处理,可以改善分类识别效果。

关键词：模糊神经网络舰船目标分类识别特征提取

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铁路应用资产证券化融资方式初探

铁道运输与经济 2000年第8期22卷 40-41页

作者：屈继成北方交通大学北京100044

资产证券化是以资产为基础 ,经过信用增级 ,在资本市场上发行债券而获取资金的一种融资方式。铁路要选择优质资产 ,结合私募和公募来筹集资金。

关键词：资产证券化融资方式信用增级铁路资产

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六安寿春西路V形斜塔景观斜拉桥设计

世界桥梁 2016年第6期44卷 12-16,22页

作者：屈计划安徽省交通规划设计研究总院股份有限公司安徽合肥230088

安徽省六安寿春西路桥为大型景观桥梁,主桥为(108+70)m V形斜塔非对称斜拉桥,桥面宽47.0m,主梁采用大悬臂宽幅展翅钢-混混合梁,钢-混结合段采用部分填充混凝土后承压板式构造。桥塔为矩形变截面混凝土塔,为实现V形斜塔景观效果,塔柱桥... 详细信息

安徽省六安寿春西路桥为大型景观桥梁,主桥为(108+70)m V形斜塔非对称斜拉桥,桥面宽47.0m,主梁采用大悬臂宽幅展翅钢-混混合梁,钢-混结合段采用部分填充混凝土后承压板式构造。桥塔为矩形变截面混凝土塔,为实现V形斜塔景观效果,塔柱桥面以上无横梁。为弥补无横梁倾斜塔柱结构受力、变形及稳定性的不足,采用了塔柱增设预应力筋、塔顶及塔梁固结段采用钢纤维混凝土、副塔斜拉索两次锚固、双索面竖琴形布置、整体挤压式锚固体系等措施。桥梁下部结构采用承台接群桩基础。主梁及桥塔均采用钢管支架法施工。采用MIDAS进行整体计算并采用ANSYS进行局部计算,结果表明结构设计满足规范要求。

关键词：斜拉桥景观桥桥塔混合梁斜拉索群桩基础钢管支架法

Light People: Professor Fanglin Bao and his cover story

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Light(Science & Applications) 2024年第6期13卷 1015-1020页

作者： ji Wang School of Science Westlake UniversityHangzhouZhejiangPR China

qu Yuan,a renowned ancient Chinese poet,once pondered in his work Heavenly Inquiry:“If the sun’s light is absent,from where does the radiance of the Hero Flower emanate?”The ability to see clearly in the darkest of nights has long been a sought-after magical power by *** holds not only immense technological significance for computer vision and remote sensing but also profound implications for transcending the dichotomy between day and night in our daily *** Fanglin Bao from Westlake University has made significant breakthroughs in this field,bringing us closer to a world where we can transform night into *** groundbreaking research on Heat-Assisted Detection and Ranging(HADAR)and night vision was featured as the cover story in Nature on July 26,2023.

关键词： bringing breakthrough holds