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包覆结构CeO_2/SiO_2复合磨料的合成及其应用

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中国有色金属学报 2010年第1期20卷 163-169页

作者：陈杨隆仁伟陈志刚江苏工业学院材料科学与工程学院常州213164 常州市高分子新材料重点实验室常州213164

以正硅酸乙酯水解所得的SiO2微球为内核,采用均匀沉淀法制备具有草莓状包覆结构的CeO2/SiO2复合粉体。利用X射线衍射仪、透射电子显微镜、X射线光电子能谱仪(XPS)、动态光散射仪和zeta电位测定仪等手段,对所制备样品的物相结构、组成、... 详细信息

以正硅酸乙酯水解所得的SiO2微球为内核,采用均匀沉淀法制备具有草莓状包覆结构的CeO2/SiO2复合粉体。利用X射线衍射仪、透射电子显微镜、X射线光电子能谱仪(XPS)、动态光散射仪和zeta电位测定仪等手段,对所制备样品的物相结构、组成、形貌和粒径大小进行表征。将所制备的包覆结构CeO2/SiO2复合粉体用于硅晶片热氧化层的化学机械抛光,用原子力显微镜(AFm)观察抛光表面的微观形貌,测量表面粗糙度,并测量材料去除率。结果表明:所制备的CeO2/SiO2复合颗粒呈规则球形,平均粒径为150～200nm,CeO2纳米颗粒在SiO2内核表面包覆均匀。CeO2颗粒的包覆显著地改变复合颗粒表面的电动力学行为,CeO2/SiO2复合颗粒的等电点为6.2,且明显地偏向纯CeO2;CeO2外壳与SiO2内核之间形成Si—O—Ce键,两者产生化学键结合;抛光后的硅热氧化层表面在2μm×2μm范围内粗糙度为0.281nm,材料去除率达到454.6nm/min。

关键词： CeO2/SiO2复合磨料包覆化学机械抛光

Determination of the number ofψ(3686)events taken at BESⅢ

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Chinese Physics C 2024年第9期48卷 8-20页

作者： m.Ablikim m.N.Achasov P.Adlarson O.Afedulidis X.C.Ai R.Aliberti A.Amoroso Q.An Y.Bai O.Bakina I.Balossino Y.Ban H.-R.Bao V.Batozskaya K.Begzsuren N.Berger m.Berlowski m.Bertani D.Bettoni F.Bianchi E.Bianco A.Bortone I.Boyko R.A.Briere A.Brueggemann H.Cai X.Cai A.Calcaterra G.F.Cao N.Cao S.A.Cetin J.F.Chang G.R.Che G.Chelkov C.Chen C.H.Chen Chao Chen G.Chen H.S.Chen H.Y.Chen m.L.Chen S.J.Chen S.L.Chen S.m.Chen T.Chen X.R.Chen X.T.Chen Y.B.Chen Y.Q.Chen z.J.Chen z.Y.Chen S.K.Choi G.Cibinetto F.Cossio J.J.Cui H.L.Dai J.P.Dai A.Dbeyssi R.E.de Boer D.Dedovich C.Q.Deng z.Y.Deng A.Denig I.Denysenko m.Destefanis F.De mori B.Ding X.X.Ding Y.Ding Y.Ding J.Dong L.Y.Dong m.Y.Dong X.Dong m.C.Du S.X.Du Y.Y.Duan z.H.Duan P.Egorov Y.H.Fan J.Fang J.Fang S.S.Fang W.X.Fang Y.Fang Y.Q.Fang R.Farinelli L.Fava F.Feldbauer G.Felici C.Q.Feng J.H.Feng Y.T.Feng m.Fritsch C.D.Fu J.L.Fu Y.W.Fu H.Gao X.B.Gao Y.N.Gao Yang Gao S.Garbolino I.Garzia L.Ge P.T.Ge z.W.Ge C.Geng E.m.Gersabeck A.Gilman K.Goetzen L.Gong W.X.Gong W.Gradl S.Gramigna m.Greco m.H.Gu Y.T.Gu C.Y.Guan z.L.Guan A.Q.Guo L.B.Guo m.J.Guo R.P.Guo Y.P.Guo A.Guskov J.Gutierrez K.L.Han T.T.Han F.Hanisch X.Q.Hao F.A.Harris K.K.He K.L.He F.H.Heinsius C.H.Heinz Y.K.Heng C.Herold T.Holtmann P.C.Hong G.Y.Hou X.T.Hou Y.R.Hou z.L.Hou B.Y.Hu H.m.Hu J.F.Hu S.L.Hu T.Hu Y.Hu G.S.Huang K.X.Huang L.Q.Huang X.T.Huang Y.P.Huang T.Hussain F.Hölzken N.Hüsken N.in der Wiesche J.Jackson S.Janchiv J.H.Jeong Q.Ji Q.P.Ji W.Ji X.B.Ji X.L.Ji Y.Y.Ji X.Q.Jia z.K.Jia D.Jiang H.B.Jiang P.C.Jiang S.S.Jiang T.J.Jiang X.S.Jiang Y.Jiang J.B.Jiao J.K.Jiao z.Jiao S.Jin Y.Jin m.Q.Jing X.m.Jing T.Johansson S.Kabana N.Kalantar-Nayestanaki X.L.Kang X.S.Kang m.Kavatsyuk B.C.Ke V.Khachatryan A.Khoukaz R.Kiuchi O.B.Kolcu B.Kopf m.Kuessner X.Kui N.Kumar A.Kupsc W.Kühn J.J.Lane P.Larin L.Lavezzi T.T.Lei z.H.Lei m.Lellmann T.Lenz C.Li C.Li C.H.Li Cheng Li D.m.Li F.Li G.Li H.B.Li H.J.Li H.N.Li Hui Li J.R.Li J.S.Li Ke Li L.J.Li L.K.Li Lei Li m.H.Li P.R.Li Q.m.Li Q.X.Li R.Li S.X.Li T.Li W.D.Li W.G.Li X.Li X.H.Li X.L.Li X.z.Li Xi Institute of High Energy Physics Beijing 100049China Beihang University Beijing 100191China Bochum Ruhr-University D-44780BochumGermany Budker Institute of Nuclear Physics SB RAS(BINP) Novosibirsk 630090Russia Carnegie mellon University PittsburghPennsylvania 15213USA Central China Normal University Wuhan 430079China Central South University Changsha 410083China China Center of Advanced Science and Technology Beijing 100190China China University of Geosciences Wuhan 430074China Chung-Ang University Seoul06974Republic of Korea COmSATS University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000LahorePakistan Fudan University Shanghai 200433China GSI Helmholtzcentre for Heavy Ion Research GmbH D-64291DarmstadtGermany Guangxi Normal University Guilin 541004China Guangxi University Nanning 530004China Hangzhou Normal University Hangzhou 310036China Hebei University Baoding 071002China Helmholtz Institute mainz Staudinger Weg 18D-55099MainzGermany Henan Normal University Xinxiang 453007China Henan University Kaifeng 475004China Henan University of Science and Technology Luoyang 471003China Henan University of Technology Zhengzhou 450001China Huangshan College Huangshan 245000China Hunan Normal University Changsha 410081China Hunan University Changsha 410082China Indian Institute of Technology madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA INFN Laboratori Nazionali di Frascati (A)INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly(B)INFN Sezione di PerugiaI-06100PerugiaItaly(C)University of PerugiaI-06100PerugiaItaly INFN Sezione di Ferrara (A)INFN Sezione di FerraraI-44122FerraraItaly(B)University of FerraraI-44122FerraraItaly Inner mongolia University Hohhot 010021China Institute of modern Physics Lanzhou 730000China Institute of Physics and Technology Peace Avenue 54BUlaanbaatar 13330Mongolia Instituto de Alta Investigación Universidad de TarapacáCasilla 7DArica 1000000Chile Jilin University Changchun 130012China Joha

The number ofψ(3686)events collected by the BESⅢdetector during the 2021 run period is determined to be(2259.3±11.1)×10~6 by counting inclusiveψ(3686)hadronic *** uncertainty is systematic and the statistical uncertainty is ***,the numbers ofψ(3686)events collected during the 2009 and 2012run periods are updated to be(107.7±0.6)×10~6 and(345.4±2.6)×10~6,*** numbers are consistent with the previous measurements within one standard *** total number ofψ(3686)events in the three data samples is(2712.4±14.3)×10~6.

关键词： ψ(3686) inclusive process Hadronic events BESⅢdetector

Performance of LHAASO-WCDA and observation of the Crab Nebula as a standard candle

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Chinese Physics C 2021年第8期45卷 166-181页

作者： F.Aharonian Q.An Axikegu L.X.Bai Y.X.Bai Y.W.Bao D.Bastieri X.J.Bi Y.J.Bi H.Cai J.T.Cai z.Cao z.Cao J.Chang J.F.Chang X.C.Chang B.m.Chen J.Chen L.Chen L.Chen L.Chen m.J.Chen m.L.Chen Q.H.Chen S.H.Chen S.z.Chen T.L.Chen X.L.Chen Y.Chen N.Cheng Y.D.Cheng S.W.Cui X.H.Cui Y.D.Cui B.z.Dai H.L.Dai z.G.Dai Danzengluobu D.della Volpe B.D'Ettorre Piazzoli X.J.Dong J.H.Fan Y.z.Fan z.X.Fan J.Fang K.Fang C.F.Feng L.Feng S.H.Feng Y.L.Feng B.Gao C.D.Gao Q.Gao W.Gao m.m.Ge L.S.Geng G.H.Gong Q.B.Gou m.H.Gu J.G.Guo X.L.Guo Y.Q.Guo Y.Y.Guo Y.A.Han H.H.He H.N.He J.C.He S.L.He X.B.He Y.He m.Heller Y.K.Hor C.Hou X.Hou H.B.Hu S.Hu S.C.Hu X.J.Hu D.H.Huang Q.L.Huang W.H.Huang X.T.Huang z.C.Huang F.Ji X.L.Ji H.Y.Jia K.Jiang z.J.Jiang C.Jin D.Kuleshov K.Levochkin B.B.Li C.Li C.Li F.Li H.B.Li H.C.Li H.Y.Li J.Li K.Li W.L.Li X.Li X.Li X.R.Li Y.Li Y.z.Li z.Li z.Li E.W.Liang Y.F.Liang S.J.Lin B.Liu C.Liu D.Liu H.Liu H.D.Liu J.Liu J.L.Liu J.S.Liu J.Y.Liu m.Y.Liu R.Y.Liu S.m.Liu W.Liu Y.N.Liu z.X.Liu W.J.Long R.Lu H.K.Lv B.Q.ma L.L.ma X.H.ma J.R.mao A.masood W.mitthumsiri T.montaruli Y.C.Nan B.Y.Pang P.Pattarakijwanich z.Y.Pei m.Y.Qi B.Q.Qiao D.Ruffolo V.Rulev A.Saiz L.Shao O.Shchegolev X.D.Sheng J.R.Shi H.C.Song Yu.V.Stenkin V.Stepanov Q.N.Sun X.N.Sun z.B.Sun P.H.T.Tam z.B.Tang W.W.Tian B.D.Wang C.Wang H.Wang H.G.Wang J.C.Wang J.S.Wang L.P.Wang L.Y.Wang R.N.Wang W.Wang W.Wang X.G.Wang X.J.Wang X.Y.Wang Y.D.Wang Y.J.Wang Y.P.Wang z.Wang z.Wang z.H.Wang z.X.Wang D.m.Wei J.J.Wei Y.J.Wei T.Wen C.Y.Wu H.R.Wu S.Wu W.X.Wu X.F.Wu S.Q.Xi J.Xia J.J.Xia G.m.Xiang G.Xiao H.B.Xiao G.G.Xin Y.L.Xin Y.Xing D.L.Xu R.X.Xu L.Xue D.H.Yan C.W.Yang F.F.Yang J.Y.Yang L.L.Yang m.J.Yang R.z.Yang S.B.Yang Y.H.Yao z.G.Yao Y.m.Ye L.Q.Yin N.Yin X.H.You z.Y.You Y.H.Yu Q.Yuan H.D.zeng T.X.zeng W.zeng z.K.zeng m.zha X.X.zhai B.B.zhang H.m.zhang H.Y.zhang J.L.zhang J.W.zhang L.zhang L.zhang L.X.zhang P.F.zhang P.P.zhang R.zhang S.R.zhang S.S.zhang X.zhang X.P.zhang Y.zhang Y.zhang Y.F.zhang Y.L.zhang B.zhao J.zhao L.zhao L.z.zhao S.P.zhao F.zheng Y.zheng B.zhou H.zhou J.N.zhou Key Laboratory of Particle Astrophyics&Experimental Physics Division&Computing Center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China TIANFU Cosmic Ray Research Center ChengduSichuanChina State Key Laboratory of Particle Detection and Electronics China University of Science and Technology of China Hefei 230026China Department of Engineering Physics Tsinghua UniversityBeijing 100084China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China National Space Science Center Chinese Academy of SciencesBeijing 100190China School of Physics Peking UniversityBeijing 100871China Center for Astrophysics Guangzhou UniversityGuangzhou 510006China School of Physics and Astronomy&School of Physics(Guangzhou) Sun Yat-sen UniversityZhuhai 519082China School of Physical Science and Technology Guangxi UniversityNanning 530004China Hebei Normal University Shijiazhuang 050024China School of Physics and microelectronics Zhengzhou UniversityZhengzhou 450001China School of Astronomy and Space Science Nanjing UniversityNanjing 210023China Key Laboratory of Dark matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023China Institute of Frontier and Interdisciplinary Science Shandong UniversityQingdao 266237China Key Laboratory for Research in Galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China Tsung-Dao Lee Institute&School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China School of Physical Science and Technology&School of Information Science and Technology Southwest Jiaotong UniversityChengdu 610031China College of Physics Sichuan UniversityChengdu 610065China Key Laboratory of Cosmic Rays(Tibet University) Ministry of EducationLhasa 850000China School of Physics and Technology Wuhan UniversityWuhan 430072China School of Physics and Astronomy Yunnan University

The first Water Cherenkov detector of the LHAASO experiment(WCDA-1)has been operating since April *** data for the first year have been analyzed to test its performance by observing the Crab Nebula as a standard *** WCDA-1 achieves a sensitivity of 65 mCU per year,with a statistical threshold of 5 *** accomplish this,a 97.7%cosmic-ray background rejection rate around 1 TeV and 99.8%around 6 TeV with an ap proximate photon acceptance of 50%is achieved after applying an algorithm to separate gamma-induced *** angular resolution is measured using the Crab Nebula as a point source to be approximately 0.45°at 1 TeV and better than 0.2°above 6 TeV,with a pointing accuracy better than 0.05°.These values all match the design *** energy resolution is found to be 33%for gamma rays around 6 *** spectral energy distribution of the Crab Nebula in the range from 500 GeV to 15.8 TeV is measured and found to be in agreement with the results from other TeV gamma ray observatories.

关键词： LHAASO-WCDA Crab Nebula angular resolution spectral energy distribution

Short-chain fatty acids in blood pressure, friend or foe

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Chinese medical Journal 2021年第19期134卷 2393-2394页

作者： Xiao-Feng Chen Si-Chong ren Guo Tang Chuan Wu Xiangqi Chen Xiao-Qiang Tang Key Laboratory of Birth Defects and Related Diseases of Women and Children of ministry of Education State Key Laboratory of BiotherapyWest China Second University HospitalSichuan UniversityChengduSichuan 610041China Department of Biochemistry and molecular Biology Basic Medical CollegeChengdu University of Traditional Chinese MedicineChengduSichuan 611137China Department of Nephrology The First Affiliated Hospital of Chengdu Medical CollegeChengduSichuan 610500China

To the Editor:Gut microbiota,the trillions of microbes living in the human and rodent gut,play a pivotal role in cardiovascular diseases,including hypertension and *** of the crucial mechanisms underlying gut microbiota functions in cardiovascular diseases is the microbiota-derived metabolites such as short-chain fatty acids(SCFAs).And emerging evidence demonstrated gut microbiota-derived metabolites——SCFAs maintained stable blood pressure.[1]However,there is no large cohort study on the correlation of SCFAs with hypertension.

关键词： cardiovascular diseases hypertension

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特异性拟杆菌引物在珠江三角洲的适应性研究

中国环境科学 2014年第8期34卷 2118-2125页

作者：王海鹰贾乐华吴仁人王菊芳宁正祥华南理工大学生物科学与工程学院广东广州510006 环境保护部华南环境科学研究所广东广州510640 广东省水与大气污染防治重点实验室广东广州510640 华南理工大学轻工与食品学院广东广州510006

在珠江三角洲地区采集人、猪、牛、狗以及家禽等33个粪便样品,高效提取基因组DNA,选取14种特异性拟杆菌引物进行检验分析,并进一步采用已知污染源类型的水样对其进行验证.结果表明:采用粪便样品DNA专属提取试剂盒和水体样品DNA专属提取... 详细信息

在珠江三角洲地区采集人、猪、牛、狗以及家禽等33个粪便样品,高效提取基因组DNA,选取14种特异性拟杆菌引物进行检验分析,并进一步采用已知污染源类型的水样对其进行验证.结果表明:采用粪便样品DNA专属提取试剂盒和水体样品DNA专属提取试剂盒提取的基因组模版纯度和提取率均符合后续实验要求.拟杆菌通用引物2#(Bac32F/Bac708R)检出率为85%(28/33),特别是对哺乳类动物和鸡的粪便具有更高的检出率.人的拟杆菌特异性引物3#(HF134F/Bac708R)和4#(HF183F/Bac708R)、反刍动物的拟杆菌特异性引物8#(CF128F/Bac708R)以及猪的拟杆菌特异性引物10#(PF163F/Bac708R)在珠江三角洲地区同时具有较高的灵敏度和较强的特异性.水体样品验证实验与实际污染类型相符,说明拟杆菌通用引物2#、人的特异性引物3#和4#以及猪的特异性引物10#在珠江三角洲地区具有很好的适用性.

关键词：拟杆菌特异性引物灵敏度特异性珠江三角洲地区

Epidemiologic and clinical characteristics of severe burn patients: results of a retrospective multicenter study in China, 2011–2015

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Burns & Trauma 2018年第2期6卷 140-150页

作者： Hao Tian Liangxi Wang Weiguo Xie Chuanan Shen Guanghua Guo Jiaqi Liu Chunmao Han Licheng ren Yi Liang Yong Tang Yuan Wang meifang Yin Jiaping zhang Yuesheng Huang Institute of Burn Research State Key Laboratory of TraumaBurn and Combined InjurySouthwest HospitalThird Military Medical University(Army Medical University)Gaotanyan Street no.29Shapingba DistrictChongqingPeople’s Republic of China Institute of Burn and Plastic Surgery the 97th Hospital of PLAXuzhouJiangsuPeople’s Republic of China Department of Burns Wuhan Third HospitalTongren Hospital of Wuhan UniversityWuhanHubeiPeople’s Republic of China The Department of Burns and Plastic Surgery First Affiliated Hospital of People’s Liberation Army General HospitalBeijingPeople’s Republic of China The Department of Burns and Plastic Surgery First Affiliated Hospital of Nanchang UniversityNanchangJiangxi 330006People’s Republic of China Institute of Burn Research Center of PLA Xijin HospitalForth Military Medical UniversityXi’anShaanxi 710032People’s Republic of China Department of Burns and Wound Center Second Affiliated HospitalCollege of MedicineZhejiang UniversityHang ZhouZhejiang 310009People’s Republic of China Department of Burn Reconstruction Surgery Xiangya HospitalCentral South UniversityChangshaHunanPeople’s Republic of China

Background: Severe burns injury is a serious pathology, leading to teratogenicity and significant mortality, and it also has a long-term social impact. The aim of this article is to describe the hospitalized population with severe burns injuries in eight burn centers in China between 2011 and 2015 and to suggest future preventive strategies. methods: This 5-year retrospective review included all patients with severe burns in a database at eight institutions. The data collected included gender, age, month distribution, etiology, location, presence of inhalation injury, total burn surface area, depth of the burn, the length of hospitalization, and mortality. SPSS 19.0 software was used to analyze the data. Results: A total of 1126 patients were included: 803 (71.3%) male patients and 323 (28.7%) female patients. Scalds were the most common cause of burns (476, 42.27%), followed by fire (457, 40.59%). The extremities were the most frequently affected areas, followed by the trunk. The median length of hospitalization was 30 (15, 52) days. The overall mortality rate was 14.21%. Conclusions: Although medical centers have devoted intensive resources to improving the survival rates of burn patients, expenditures for prevention and education programs are minimal. Our findings suggest that more attention should be paid to the importance of prevention and the reduction of injury severity. This study may contribute to the establishment of a nationwide burn database and the elaboration of strategies to prevent severe burns injury.

关键词： Severe burns Epidemiology multicenter

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连续体系桥梁的主动及混合控制抗震研究

桥梁建设 2016年第3期46卷 45-50页

作者：朱军涛中铁第四勘察设计院集团有限公司湖北武汉430063

为研究连续梁桥及刚构桥的主动及混合控制抗震效果,以某4×50m单箱预应力混凝土桥为例,采用基于支座初始刚度的LQG主动控制法进行抗震研究。采用mATLAB编程,建立空间梁单元有限元模型,通过震动控制仿真平台NLAHC1.0对有限元模型施加LQG... 详细信息

为研究连续梁桥及刚构桥的主动及混合控制抗震效果,以某4×50m单箱预应力混凝土桥为例,采用基于支座初始刚度的LQG主动控制法进行抗震研究。采用mATLAB编程,建立空间梁单元有限元模型,通过震动控制仿真平台NLAHC1.0对有限元模型施加LQG主动控制,加入主动施力器及传感器,采用模态缩减技术及Kalman滤波器建立控制模型,对连续梁桥和刚构桥的墩底横桥向弯矩及支座的剪力～位移曲线进行分析,并提出了一种新的改进控制法。结果表明：主动控制抗震方法能显著减小刚构桥的墩底弯矩,而混合控制抗震方法不能有效减小连续梁桥的墩底弯矩;考虑支座非线性引起的结构刚度矩阵变化,改进控制法对混合控制连续梁桥的减震效果明显。

关键词：连续梁桥刚构桥 LQG主动控制法混合控制有限元法隔震桥梁抗震

Yu Gan Long Ameliorates Hepatic Fibrosis by Inhibiting PI3K/AKT,Ras/ERK and JAK1/STAT3 Signaling Pathways in CCl4-induced Liver Fibrosis Rats

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Current medical Science 2020年第3期40卷 539-547页

作者： Hou-gang LI Peng-tao YOU Yu XI Yu CAI Yi-jun TU meng-heng WANG Wan-ci SONG Tai-min QUAN Hui-ying ren Yan-wen LIU Han-xiong DAN Shi-qing XU Hubei Key Laboratory of Resources and Chemistry of Chinese medicine Hubei University of Chinese MedicineWuhan430065China College of Pharmacy Hubei University of Chinese MedicineWuhan430065China Wuhan Junan Pharmaceutical Co. Ltd.Wuhan430023China

Yu Gan Long(YGL)is a Chinese traditional herbal formula which has been reported to attenuate liver fibrosis for many years and we have explored its anti-fibrotic mechanism through blocking transforming growth factor(TGF-β)in the previous *** the mechanisms associated with platelet-derived growth factor(PDGF)-BB remain *** this study,we further investigated the mechanism of YGL reducing carbon tetrachloride(CCl4)-induced liver fibrosis in *** results showed that YGL suppressed CCl4-induced upregulation of collagen IV(Col IV),type HI precollagen(PCHI),hyaluronuc acid(HA)and laminin(LN),which are implicated in liver ***,YGL reduced theα-smooth muscle actin(α-SmA)expression,which acts as the indicator of liver ***,YGL decreased the serum levels of hepatic stellate cell(HSC)mitogen PDGF-BB and inflammation cytokines,including TNF-α,IL-1β,*** involved in liver fibrosis,such as Ras,p-Raf-1,p-ERK1/2,p-JNK,p-P38,p-PI3K,p-AKT,p-JAKl,p-STAT3 were downregulated significantly after treatment with *** results indicated that YGL ameliorated CCl4-induced liver fibrosis by reducing inflammation cytokines production,and suppressing Ras/ERK,PI3K/AKT,and JAK1/STAT3 signaling pathways,which provided further evidence towards elucidation of the anti-fibrotic mechanism of YGL.

关键词： Yu Gan Long traditional Chinese herbal therapy liver fibrosis Ras/ERK PI3K/AKT JAK1/STAT3

低应力水平下混凝土中氯离子扩散行为多尺度分析方法

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工程力学 2017年第3期34卷 84-92页

作者：金浏张仁波杜修力北京工业大学城市与工程安全减灾教育部重点实验室清华大学土木工程系

混凝土的扩散渗透性能与其微观结构(包括细观尺度上粗骨料颗粒与砂浆之间的界面过渡区及砂浆本身的微观结构等)密切相关。在微观尺度上,砂浆和界面过渡区均可视为由无孔砂浆基质和孔隙水夹杂相组成的两相复合材料,二者的主要区别表现为... 详细信息

混凝土的扩散渗透性能与其微观结构(包括细观尺度上粗骨料颗粒与砂浆之间的界面过渡区及砂浆本身的微观结构等)密切相关。在微观尺度上,砂浆和界面过渡区均可视为由无孔砂浆基质和孔隙水夹杂相组成的两相复合材料,二者的主要区别表现为孔隙率不同。在外荷载作用下,砂浆和界面过渡区的毛细孔隙率及孔隙连通性会发生改变,从而改变混凝土的扩散渗透性能。基于此,该文建立了低应力水平下混凝土中氯离子扩散行为多尺度理论分析方法,获得了混凝土表观扩散系数与外荷载(以体应变表征)及砂浆和界面过渡区当前孔隙率的定量关系。分析所采用的主要参数为砂浆和界面过渡区的毛细孔隙率、无孔砂浆基质和骨料相的力学参数、骨料相和界面过渡区的体积分数、外荷载等。与已有文献数据对比知,该文分析结果与之吻合良好,表明了理论分析方法的合理性与准确性。此外,基于该方法,探讨分析了混凝土微/细观结构对其宏观扩散性能的影响。

关键词：混凝土氯离子扩散行为低应力水平微观结构多尺度