oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 76 )

2019 ( 420 )

2018 ( 2792 )

2017 ( 2925 )

Custom range...

Search Results: 1 - 10 of 135715 matches for " 周春火 "
All listed articles are free for downloading (OA Articles)
Page 1 /135715
Display every page Item
水布垭坝区滑坡关键问题研究
建军,徐瑞,
人民黄河 , 2009,
Abstract: ?清江水布垭水利枢纽工程坝区环境地质条件复杂,多滑坡、危岩体和不利地质结构,在施工过程中形成一系列滑坡或变形体.通过原位力学试验、非饱和土试验、蠕变试验、降雨条件下非饱和渗流稳定性数值分析等,取得了水布垭坝区主要滑坡的地质边界条件、物质组成、地下水动态及物理力学参数,建立了一套考虑降雨及雾雨作用下的滑坡非饱和渗流稳定性分析方法,并对古树包、马岩湾、大岩淌滑坡进行了稳定性分析和评价,建立了滑坡的蠕变模型及稳定性预测方法.建议做好滑坡体地表排水和护坡措施、尽量降低边坡地下水位、对现有抗滑桩进行加固、加强监测和巡视.
不同复种方式对水稻产量和土壤肥力的影响
,潘晓华,吴建富,石庆华
植物营养与肥料学报 , 2013, DOI: 10.11674/zwyf.2013.0205
Abstract: 连续2年研究了不同复种方式对双季水稻产量和稻田土壤肥力的影响。结果表明,紫云英+双季稻处理(ZDD)的水稻产量明显高于油菜+双季稻(YDD)和冬闲+双季稻处理(XDD)。其中,2010年早稻产量处理间差异不大,晚稻ZDD处理比YDD高3.5%,比XDD高4.1%;2011年ZDD处理早稻产量极显著高于YDD处理,幅度为6.4%,晚稻极显著高于XDD,幅度为4.6%;有效穗的不同是导致处理间产量差异的主要原因。水稻根系总干重呈ZDD>YDD>XDD,差异显著或极显著,且10cm以下土层分布的水稻根系ZDD和YDD处理明显高于XDD。复种2年后,与XDD相比,ZDD和YDD处理的土壤有机质、全氮含量、微生物总量和酶活性增加,其中ZDD处理的土壤有机质含量分别比YDD、XDD高0.58%、0.95%,差异显著;与试验前相比,土壤全氮含量三种复种方式均有提高,ZDD、YDD和XDD处理的提高幅度分别为6.52%、2.17%和0.72%,且ZDD和XDD间差异达显著水平;土壤微生物总量呈ZDD>YDD>XDD,处理间差异极显著。冬种紫云英并替代部分化肥施用明显提高水稻产量,冬种紫云英和油菜有利于土壤肥力改善。
鄱阳湖流域生态足迹与生态环境协调度的计算与分析
赖发英,,肖远东,宫 松,陈 静
中国生态农业学报 , 2006,
Abstract: 生态足迹是一种基于消费度量区域是否可持续发展的新参考方法,而经济与环境协调度从横向角度衡量可持续发展。本研究介绍了生态足迹的概念及生态足迹和生态环境协调度的计算评价方法,并对鄱阳湖流域2003年的生态足迹和生态环境协调度进行了计算和分析。结果表明,2003年鄱阳湖流域存在生态赤字,人均生态协调系数DS=1.3802<1.414,生态环境协调度为43,表明本地区2003年的发展模式是基本不协调和基本不可持续的。
CREEP CHARACTERISTIC AND LONG-TERM STABILITY OF ROCK MASS IN SHIP LOCK HIGH SLOPE OF THE THREE GORGES PROJECT
三峡船闸高边坡岩体时效特性及长期稳定性分析

Xu Ping,Yang Tingqing,Xu Chunmin,Zhou Huoming,
徐平
,杨挺青,,

岩石力学与工程学报 , 2002,
Abstract: The results of creep test in site for rock mass and discontinuity in shiplock area of the Three Gorges Project are introduced. Considering the effects of construction excavation and seepage pressure, the rheological analysis on the stability of shiplock slope is made during construction and running. The analysis results are validated by measured data in site.
奶牛乳腺炎金黄色葡萄球菌临床分离株生化特性与菌体蛋白免疫原性分析

农业生物技术学报 , 2006,
Abstract: ?:病原学调查发现金黄色葡萄球菌是奶牛乳腺炎的最主要致病菌之一。从53株金黄色葡萄球菌乳样分离株中挑选了培养和形态典型的六株进行生化试验和传代稳定性试验,进一步研究这六株菌的凝固酶、溶血素等致病性因子和耐药性。对菌体裂解产物进行蛋白电泳图谱分析发现菌体蛋白条带具有很高的相似性,tq-1株电泳蛋白条带密度较其它几株高。用其中四株生化典型、传代稳定、致病因子较多的菌株免疫兔,制备高免血清,分析全菌抗原的蛋白转印图谱,发现xg-2株在52kd处有特殊保护性抗原条带。综合本文各试验结果,确定以tq-1和xg-2株为疫苗候选株。
RHEOLOGICAL ANALYSIS ON ROCK MASS OF HIGH SLOPE CONSIDERING EFFECTS OF EXCAVATION UNLOADING
高边坡岩体开挖卸荷效应流变数值分析

徐平,
岩石力学与工程学报 , 2000,
Abstract: 对三峡工程船闸高边坡的典型剖面,在试验确定的边坡岩体开挖卸荷带及其参数的基础上,对边坡进行了施工开挖卸荷效应的流变稳定性分析。
Comparison between MODIS aerosol product C004 and C005 and evaluation of their applicability in the north of China
MODIS气溶胶C004、C005产品的对比分析及其在中国北方地区的适用性评价

ZHOU Chun-yan,LIU Qin-huo,TANG Yong,WANG Kai,SUN Lin,HE Ying-xia,
,柳钦,唐 勇,王 凯,孙 林,何颖霞

遥感学报 , 2009,
Abstract: MODIS aerosol product Collection 005 (C005) is an upgrade of C004, and is introduced in detail in this paper. Through fitting with AERONET ground observation aerosol optical thickness (AOT), MODIS aerosol C004 and C005 products of TERRA and AQUA are compared and evaluated to analyze their applicability in the north of China at Beijing and Yulin sites. We match AERONET ground-based data with MODIS aerosol product by band interpolation and temporal-spatial matching, then compare and evaluate them by linear fitting. We conceive a scale of temporal-spatial matching in the north of China considering the local aerosol movement velocity of given sites. The results show that: (1) C005 product algorithm does not improve the accuracy of AOT at Beijing site, and the accuracy drops when AOT< 0.8; both C004 and C005 products do not have a significant application at Beijing site, but the C004 performs better than C005 products. (2) At Yulin site, TERRA-MODIS C004 product meets the demand, and the accuracy of AQUA-MODIS C004 product decreases. Compared with the C004 product, the accuracy of the C005 product improves greatly, and correlation coefficients between AOTs of three bands (470nm, 550nm, 660nm) and the AERONET ground observation data are all higher than 0.9. It could be concluded that the method of the surface reflectance determination used in the new algorithm is feasible for dark dense vegetation, but is not suitable for the bright surface.
Calculation and analysis of ecological footprint and ecological environment coordination degree of Poyang Lake area
鄱阳湖流域生态足迹与生态环境协调度的计算与分析

LAI Fa-Ying,ZHOU Chun-Huo,XIAO Yuan-Dong,GONG Song,CHEN Jing,
赖发英
,,肖远东,宫 松,陈 静

中国生态农业学报 , 2006,
Abstract: Ecological footprint is a new reference method based on the consumption to evaluate the sustainable development of an area,while the ecological coordination degree assesses the sustainable development of an area transversally.The concept of ecological footprint,the calculation methods of ecological footprint and the ecological coordination degree are introduced in this paper.And the calculation and analysis results of the ecological footprint and the ecological coordination degree of Poyang Lake area in 2003 are presented.The results show that there is an ecological deficit in Poyang Lake area in 2003 and the ecological coordination quotiety is 1.3802,the ecological coordination degree is 43 showing that the development of Poyang Lake area is not coordinated and not sustainable.
猪源链球菌溶血性的检测*
陈国强,陆承平,
微生物学通报 , 2002,
Abstract: 用平板法和上清法检测了 1 9株猪源链球菌的溶血性 ,并通过加入还原剂或氧化剂分别作活化和抑制试验 ,对各菌株溶血素的性质做了初步鉴定。其中 8株猪链球菌 2型菌株在血平板上的溶血性较弱 ,仅为α溶血或弱 β溶血 ,但在THB和 5 %血清THB中都可产生很强的溶血性 ,其溶血性可被还原剂活化 ,被氧化剂和胆固醇所抑制 ,卵磷脂对其活性则没有影响 ,属于巯基活化类 (类SLO)溶血素。 9株马链球菌兽疫亚种菌株在血平板上呈显著的 β溶血 ,在不含血清THB中不能产生溶血性 ,在含血清的THB中可产生较强的
猪链球菌2型溶血毒素的产生条件及其特性分析
陈国强,,陆承平
南京农业大学学报 , 2000, DOI: 10.7685/j.issn.1000-2030.2000.03.019
Abstract: 猪链球菌2型江苏分离株HA9801产生一种溶血毒素,培养条件影响其产量。最佳培养条件为ToddHewitt肉汤(pH75)中接种V(种子液)∶V(肉汤)=1∶100的种子液,37℃静置培养12h。培养基中的胰蛋白胨对该溶血素的产生起决定性作用。该溶血素可被还原剂活化,被氧化剂和胆固醇及蛋白酶K抑制,亦被抗链球菌溶血素O阳性血清和抗猪链球菌2型全菌阳性血清抑制。该溶血素在-20℃较稳定,在4,25和37℃下均易失活,但在还原剂作用下可恢复活性。猪红细胞对其最敏感,豚鼠、家兔、人、绵羊、牛、鸡及鲫等红细胞次之,小鼠红细胞对其最不敏感
Page 1 /135715
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.