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Dynamic analysis of the Wenchuan Earthquake disaster and reconstruction with 3-year remote sensing data

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International Journal of Digital Earth 2010年第4期3卷 355-364页

作者： Huadong Guo Liangyun Liu liping lei Yanhong Wu Liwei Li Bing Zhang Zhengli Zuo Zhen Li Key Laboratory of Digital Earth Science Center for Earth Observation and Digital EarthChinese Academy of SciencesBeijing 100190China

Earth observation is an effective technique that plays an important role in earthquake damage reduction and *** paper introduces the results of dynamic analysis on monitoring and assessing heavily impacted areas affected by the Wenchuan Earthquake using remote sensing data acquired in the past 3 years from 2008 to *** after the disaster on 12 May 2008,the Chinese Academy of Sciences launched a project entitled‘Wenchuan Earthquake Disasters Monitoring and Assessment Using Remote Sensing Technology.’More than 400 images from 17 satellites and 20.2TB airborne remote sensing data were acquired to facilitate quick monitoring and evaluation of severely damaged areas in 14 *** of the image analyses were forwarded on a timely basis to assist with consultative service and decisionmaking *** subsequent years,in order to monitor the process of environmental restoration and reconstruction,airborne optical remote sensing images covering most of the severely damaged areas were again acquired in May 2009 and April *** images were analyzed and compared along with images from *** were useful in support of further work on environmental protection and reconstruction in earthquake-damaged *** typical areas were selected for illustrative purposes including Tangjiashan Barrier Lake,Beichuan County,and counties of Yingxiu and the new *** results well demonstrate the importance and effectiveness of the utility of earth observation for disaster mitigation and reconstruction.

关键词： Wenchuan Earthquake earth observation disaster mitigation reconstruction

Rapid surface texturing to achieve robust superhydrophobicity,controllable droplet impact,and anti-frosting performances

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Friction 2024年第2期12卷 291-304页

作者： Qingwen DAI lei CHEN Jiabao PAN liping SHI Dameng LIU Wei HUANG Xiaolei WANG College of Mechanical and Electrical Engineering Nanjing University of Aeronautics&AstronauticsNanjing 210016China State Key Laboratory of Tribology in Advanced Equipment Department of Mechanical EngineeringTsinghua UniversityBeijing 100084China School of Mechanical Engineering Anhui Polytechnic UniversityWuhu 241000China School of Mechanical Engineering Anhui University of TechnologyMa’anshan 243032China

Robust superhydrophobic surfaces with excellent capacities of repelling water and anti-frosting are of importance for many mechanical *** this work,wear-resistant superhydrophobic surfaces were fabricated by curing a mixture of polyurethane acrylate(PUA)coating and 1H,1H,2H,2H-Perfluorodecyltrichlorosilane(HFTCS)on titanium alloy(TC4)surfaces decorated with micropillars pattern,thus,composite functional surfaces with PUA coating in the valleys around the micropillars pattern of TC4 were *** contact angle on fabricated surfaces could reach 167°.Influences of the geometric parameters of micropillars pattern on the apparent contact angle were investigated,and the corresponding wear-resistant property was *** impact and anti-frosting performances on the prepared surfaces were *** optimized design of surface texture with robust superhydrophobicity,controllable droplet impact,and anti-frosting performances was *** design principle is of promising prospects for fabricating superhydrophobic surfaces in traditional mechanical systems.

关键词： surface texture robust superhydrophobic wear-resistant droplet impact anti-frosting

A comparison of atmospheric CO_2 concentration GOSAT-based observations and model simulations

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Science China Earth Sciences 2014年第1期57卷 1393-1402页

作者： lei liping GUAN XianHua ZENG ZhaoCheng ZHANG Bing RU Fei BU Ran Key Laboratory of Digital Earth Science Institute of Remote Sensing and Digital EarthChinese Academy of Sciences

Satellite observations of atmospheric CO2 are able to truly capture the variation of global and regional CO2 *** model simulations based on atmospheric transport models can also assess variations of atmospheric CO2 concentrations in a continuous space and time,which is one of approaches for qualitatively and quantitatively studying the atmospheric transport mechanism and spatio-temporal variation of atmospheric CO2 in a global *** observations and model simulations of CO2 offer us two different approaches to understand the atmospheric ***,the difference between them has not been comprehensively compared and assessed for revealing the global and regional features of atmospheric *** this study,we compared and assessed the spatio-temporal variation of atmospheric CO2 using two datasets of the column-averaged dry air mole fractions of atmospheric CO2(XCO2)in a year from June 2009 to May 2010,respectively from GOSAT retrievals(***)and from Goddard Earth Observing System-Chemistry(GEOS-Chem),which is a global 3-D chemistry transport *** addition to the global comparison,we further compared and analyzed the difference of CO2 between the China land region and the United States(US)land region from two datasets,and demonstrated the reasonability and uncertainty of satellite observations and model *** results show that the XCO2 retrieved from GOSAT is globally lower than GEOS-Chem model simulation by 2 ppm on average,which is close to the validation conclusion for GOSAT by ground *** difference of XCO2 between the two datasets,however,changes with the different *** China land region,the difference is large,from 0.6 to 5.6 ppm,whereas it is 1.6 to 3.7 ppm in the global land region and 1.4 to 2.7 ppm in the US land *** goodness of fit test between the two datasets is 0.81 in the US land region,which is higher than that in the global land region(0.67)and China land region(0.68).The analysis results f

关键词： GOSAT GEOS-Chem atmospheric CO2 concentration inconsistency regional comparison

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The B-site ordering in RFe_(0.5)Cr_(0.5)O_(3)ceramics and its effect on magnetic properties

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Chinese Physics B 2024年第10期33卷 434-441页

作者： Li Hou lei Shi liping Yang Yiqiang Liu Zhitao Li Lanxiang Meng School of Materials Science and Engineering Anyang Institute of TechnologyAnyang 455000China Hefei National Laboratory for Physical Sciences at Microscale University of Science and Technology of ChinaHefei 230026China

To insight into the B-site ordering in RFe_(0.5)Cr_(0.5)O_(3)ceramics,a series of RFe_(0.5)Cr_(0.5)O_(3)ceramics(R=La,Y,Lu)were synthesized by the sol-gel method,and the structural and magnetic properties were systemically *** using the Rietveld refinement of all samples,it is found that the structural distortion is increased as the R ionic radius decreases,leading to the weakened interactions between Fe/Cr ***,the Fe and Cr are arranged in disorder in LaFe_(0.5)Cr_(0.5)O_(3),but partially ordered in YFe_(0.5)Cr_(0.5)O_(3)and LuFe_(0.5)Cr_(0.5)O_(3),showing an increasing trend of the proportion of ordered domains with the decrease of R ionic *** fitting the temperature-dependent magnetizations,it is identified that the magnetization reversal(MR)in disorder LaFe_(0.5)Cr_(0.5)O_(3)is resulted from the competition between the moments of Cr and Fe *** the partially ordered YFe_(0.5)Cr_(0.5)O_(3)and LuFe_(0.5)Cr_(0.5)O_(3)ceramics,because of the presence of Fe-O-Cr networks in the ordered domains whose moment is antiparallel to that of Fe-O-Fe and Cr-O-Cr in the disordered domains,the compensation temperature T_(comp)of MR is increased by nearly 50 *** results suggest that the changing of R-site ions could be used very effectively to modify the Fe-O-Cr ordering,apart from the structural distortion,which has a direct effect on the magnetic exchange interactions in RFe_(0.5)Cr_(0.5)O_(3)*** at values of composition where ordered domains are expected to be larger in number as compared to disordered domains and with a weaker structural distortion,one can expect a higher transition temperature Tcomp,providing a different view for adjustment of the magnetic properties of RFe_(0.5)Cr_(0.5)O_(3)ceramics for practical applications.

关键词： RFe_(0.5)Cr_(0.5)O_(3)ceramics structural distortion B-site ordering magnetization reversal

Gut microbiota-mediated modulation of lipid metabolism by punicic acid in diet-induced hepatic steatosis

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Food Science and Human Wellness 2024年

作者： liping Chen Yifan lei Hengqian Lu Yongzhong Wang School of Life Sciences， Anhui University Anhui Key Laboratory of Modern Biomanufacturing Key Laboratory of Human Microenvironment and Precision Medicine of Anhui Higher Education Institutes， Anhui University

Pomegranate seed oil (PSO) mainly consisted of punicic acid (PunA)， has gained attention due to rich conjugated linolenic acids and potential application in the improvement of various diseases. The aim of this study was to explore the ability of PunA to modulate lipid metabolism associated with non-alcoholic fatty liver disease (NAFLD) and explore the emerging role of the gut microbiota in modulating hepatic lipid metabolism. In this regard， PunA’s capacity was evaluated through C57BL/6J fed with a choline and L-amino acid defined， high fat diet (CDAHFD). Mice were randomly divided into four groups: NC group， MC group， PSO group and Cur group. Collected results indicated that supplement of PunA improved hepatic lipid profile. PunA administration also ameliorated hepatic steatosis and lipid accumulation. mRNA analysis showed that PunA exerted ameliorative e?ect on hepatic lipid accumulation by downregulating the mRNA expression of Dgat1， Scd-1， Srebp-1c， but increasing expression level of Cpt-1α. Metagenomic analysis discovered that PunA increased species diversity and richness of intestinal microbiota， promoted proliferation of beneficial commensals and restraining the endotoxin-producing microorganisms in cecum of CDAHFD-administrated mice. Furthermore， PunA suppressed lipid accumulation and lipid droplet formation in a cell NAFLD model in vitro. Overall， PunA exhibited anti-lipogenic and lipid-lowering effects， improvement of intestinal flora. In summary， PunA could be a candidate for the exploitation of functional foods or nutraceuticals aiming NAFLD.

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苏联勃列日涅夫时期的宗教及其思考

世界宗教文化 2017年第2期 45-54页

作者：雷丽平吉林大学东北亚研究院

苏联时期,勃列日涅夫上台后,针对赫鲁晓夫时期实行的反宗教政策造成的恶果和引起的社会动荡,他对宗教政策进行了及时的调整,实施了一系列新的宗教政策,摈弃利用群众运动打击宗教的办法,实行国家机关对宗教的高度控制;高度重视法律手段,... 详细信息

苏联时期,勃列日涅夫上台后,针对赫鲁晓夫时期实行的反宗教政策造成的恶果和引起的社会动荡,他对宗教政策进行了及时的调整,实施了一系列新的宗教政策,摈弃利用群众运动打击宗教的办法,实行国家机关对宗教的高度控制;高度重视法律手段,利用法律严控宗教的蔓延;在思想上加强无神论宣传,加强唯物主义者教育,与宗教争夺思想阵地。20世纪60—70年代初是东正教新的复兴的开端。与此同时,西方敌对势力开始利用宗教对苏联搞意识形态渗透。本文以东正教为例,通过对勃列日涅夫执政时期的苏联宗教问题的考察,剖析当时苏联宗教复兴的种种原因。

关键词：勃列日涅夫宗教政策教会

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弹丸束喷丸有限元模型数值模拟及试验研究

机械工程学报 2011年第22期47卷 43-48页

作者：李源雷丽萍曾攀清华大学先进成形制造教育部重点实验室北京100084 清华大学机械工程系北京100084

喷丸工艺是一种有效提高工件表面疲劳抗力的表面处理工艺,被广泛应用在航空、汽车、动力机械等重要领域。喷丸数值模拟是制订喷丸工艺方案、评估喷丸后工件表面疲劳抗力的主要理论工具。目前,现有的喷丸数值模型主要有单弹丸模型、阵列... 详细信息

喷丸工艺是一种有效提高工件表面疲劳抗力的表面处理工艺,被广泛应用在航空、汽车、动力机械等重要领域。喷丸数值模拟是制订喷丸工艺方案、评估喷丸后工件表面疲劳抗力的主要理论工具。目前,现有的喷丸数值模型主要有单弹丸模型、阵列弹丸模型等形式,在这些模型中,弹丸的撞击位置是固定的,忽略了真实的喷丸过程中弹丸位置的随机性。采用有限元计算软件ABAQUS提供的python语言开发一种弹丸在空间位置随机分布的弹丸束喷丸模型,在此模型基础上研究喷丸工艺参数与残余应力间的分布规律,进一步讨论喷丸工艺对工件表面粗糙度的影响,模拟喷丸强度的饱和过程,并通过Q235钢喷丸试验对弹丸束喷丸模型进行验证,为喷丸工艺的精确控制提供了科学依据和理论基础。

关键词：喷丸残余压应力弹丸束喷丸模型喷丸强度

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历史上俄罗斯农民的东正教信仰初论

世界历史 2005年第6期 56-65页

作者：雷丽平吉林大学东北亚研究院副教授博士研究生长春130012

历史上俄罗斯农民的东正教信仰,大量渗透农民自己传统信仰的成分。俄罗斯农民按自己方式改造了拜占庭东正教,从而形成了被称为“第三罗马”的俄罗斯东正教。俄罗斯农民作为一个生活闭塞、缺乏文化的下层群体,在抵制东正教的传播和改造... 详细信息

历史上俄罗斯农民的东正教信仰,大量渗透农民自己传统信仰的成分。俄罗斯农民按自己方式改造了拜占庭东正教,从而形成了被称为“第三罗马”的俄罗斯东正教。俄罗斯农民作为一个生活闭塞、缺乏文化的下层群体,在抵制东正教的传播和改造外来的东正教文化的过程中,显示了农民群体在文化上保守落后的特性,是国家现代化中的一种阻碍性力量。从历史上农民宗教信仰为切入点,去探索农民阶层的历史作用,这是人文科学研究中的一个重大课题,本文只是作一个尝试性的探索而已。

关键词：俄罗斯农民东正教信仰

高速公路突发事件组织间应急信息沟通实证研究

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管理评论 2015年第9期27卷 213-220页

作者：雷丽萍华东政法大学科学研究院上海201620

本文以一典型高速公路突发事件多组织应急救援案例12.5京珠高速黑火药爆炸事件为依托,运用社会网络分析方法构建并分析了高速公路突发事件组织间信息沟通网络。研究发现,高速公路经营企业与基层地方政府存在沟通障碍;常态下与高速公路... 详细信息

本文以一典型高速公路突发事件多组织应急救援案例12.5京珠高速黑火药爆炸事件为依托,运用社会网络分析方法构建并分析了高速公路突发事件组织间信息沟通网络。研究发现,高速公路经营企业与基层地方政府存在沟通障碍;常态下与高速公路具有业务联系的子群与无业务相关性的子群之间在应急状态下存在信息共享困难;与高速公路无常态业务联系的子群内部信息沟通强度悬殊,中心与边缘分化趋势显著,容易造成核心组织信息沟通压力过大;而与高速公路具有常态业务关联性的子群内部,沟通结构比较合理,应急信息沟通顺畅。

关键词：高速公路突发事件应急信息沟通网络