978 resultados para Laminin-511


Relevância:

10.00% 10.00%

Publicador:

Resumo:

在介绍CIM/CIMS在我国取得的重大进展的基础上,探讨了CIMS推广应用过程中存在的问题,分析了原因并介绍了解决问题的几点经验.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

计算机网络技术的迅速发展,以及Internet网络与技术的迅速普及,为各种分布式应用互连提供了底层通信条件。特别是以CORBA/IIOP技术为主流的分布对象技术的兴起,为解决各种开放式分布异构环境(包括 Internet/Intranet)下的应用互操作提供了基础框架和技术支持。但是,应用互操作技术及其在特定应用领域的分布式异构环境下的应用互操作本身是非常复杂和不断发展的,也是当前本领域研究的热点问题,具有广泛的应用需求与应用价值。本文结合国家“863/511”主题研究课题“面向CIMS基于CORBA的多数据源互操作与开放分布处理技术的研究与实现”,以及沈阳市科学技术基金课题“信息网多元数据库互操作技术攻关与应用”两项课题,在对分布对象技术和先进的CORBA/IIOP软件总线的深入分析和研究的基础上,给出了解决开放式分布异构环境下应用互操作问题的三种方法:应用组件化、遗产应用的面向对象包装、多数据源的对象化。本文探讨了基于CORBA/IIOP的应用组件的四个基本特征:自描述、可定制、可集成、连接机制,以及遗产应用的面向对象包装的七种方法:分层、数据升迁、重建应用、中件、封装、体系结构实现的包装、代理的包装。本文还给出了基于Internet/Intranet环境下的应用互操作技术与Object Web技术的实现方法与实现结构。基于上述探讨、分析和研究,为本文构造基于CORBA/IIOP的应用互操作系统的实现与应用奠定了坚实的基础。本文还重点研究和分析了应用互操作研究领域典型和普遍存在的多数据源互操作问题,提出了多数据源对象化的公共数据模型OOMDSCDM,并设计和实现了CORBA内核ORB原型系统,以及建立在此基础上的多数据源互操作系统MISORB系统。本系统实现了局部数据源模型到面向对象的多数据源公共数据模型OOMDSCDM的转化,成功的实现了文件型数据源和关系型数据源(包括SQL Server、Oracle等)等基于CORBA的对象化,解决了各种数据资源的“即插即用”。本系统还提出一种多数据源互操作的视图扩展机制,增强了多数据源互操作的灵活性和透明性。上述内容是“面向CIMS基于CORBA的多数据源互操作与开放分布处理技术的研究与实现”课题成果的重要组成部分。该项目研究成果通过了国家863专家组评审与验收,认为在基于CORBA规范的ORB实现与基于ORB的多数据源互操作与开放分布处理的模型、实现机制和实现方法上有创新,达到国际先进水平。本文以科技信息网络系统的信息资源为对象,设计并实现了一个基于CORBA/IIOP的应用互操作系统,实现了通过Web浏览器对信息资源,包括遗产光盘数据库资源的远程访问。

Relevância:

10.00% 10.00%

Publicador:

Resumo:

The dissertation focuses on the petrology, geochemistry of the volcanic rocks in east Tibet and southeast Yunnan. It lucubrates the Magmatic process, forming mechanism and the possible tectonic settings of the volcanic rocks. The volcanic rocks of Nangqen basin in east Tibet, Qinghai province are mainly Cenozoic intermediate-acid shoshonites. The rocks are LREE enriched and the LREE/HREE = 3~34; (La/Yb)_N = 18.17-53.59, and ΣREE 222~1260μg/g. There are no Eu anomaly, and Nb, Ta, Zr, Hf, Ti are markedly depleted. The isotopic composition is ~(87)Sr/~(86)Sr = 0.70497~0.70614, ~(206)Pb/~(204)Pb = 18.622~18.974, ~(208)Pb/~(204)Pb = 38.431~38.996, ~(207)Pb/~(204)Pb = 15.511~15.613, respectively. K-Ar age of the whole rocks and the single mineral are between 32.0-36.5Ma. Based on the trace elements and isotopic elements, we get the conclusion that the partial melting is one of the dominated forming mechanisms for the volcanic rocks in Naneqen basin. The magma did not experience the crustal contamination en route to the surface; however, the complex mixture took place in the upper mantle before the melt was formed. There are at least two kinds of mixed sources that can be identified. The basalt in southeast Yunnan province is studied. They are distributed in Maguan, Tongguan, and Pingbian County, which is located on the both sides of the Red River belt, and the ultrabasic xenolith are cursory introduced. The volcanic rocks belongs to the alkali series, which can be subdivided into trachybasalt and basanite(Ol normal molecule >5). The volcanic rocks are characteristics by high Ti and low Mg#. According to the magma calculation model, the original rocks of the basalt in southeast Yunnan province are Spinel Lherzolite in Tongguan, Garnet Lherzolite in Pingbian and Maguan, while Togguan undergoes 2-5 percent and percent of partial melting, whereas volcanism in Maguan and Pingbian was so complex to calculate. The fractional crystallization took place during the magma evoltion in southeast Yunnan. The basalt is enriched in LREE with LREE/HREE=9.23-20.19. All of the trace elements display weak Nb, Ta peak, and the depletion of Zr, Hf and Ti in Maguan and pingbian represent the presence of Garnet in the source. The composition of the isotope ratio are ~(87)Sr/~(86)Sr = 0.70333-0.70427, ~(143)Nd/~(144)Nd = 0.512769-0.512940, ~(206)Pb/~(204)Pb = 18.104-18.424, ~(207)Pb/~(204)Pb = 15.483 -15.527; ~(208)Pb/~(204)Pb = 37.938-38.560, respectively, which shows the characteristics of the HIMU type OIB. The volcanic rocks of the southwest Yunnan are derived from the enriched, OIB type mantle sources by synthesizing all the data from trace and isotope elements. It is similar to that of the volcanic rocks in Hawaii, a typical kind of the mixtures of the recycled oceanic crust plume and depleted asthenosphere. To sum up, the volcanic rocks in southeast Yunnan are formed by the intraplate hotpot volcanism.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

为更好了解枯土矿物对稀土元素(REE)的吸附及其控制因素,进行了不同溶液介质条件(平衡时间、REE含量、pH:3~6.5)1g·L^-1高岭土对REE吸附的系列实验。结果表明:稀土在较短时间内(24h)吸附/解吸过程达到平衡;Langrnuir吸附等温线能模拟REE在高岭土上的吸附,总的趋势是REE含量越高,分馏越不明显;此外,pH对REE吸附和分馏有很大影响,REE分配系数随pH值增加而增加,且在pH近中性时,出现了明显的重稀土比轻稀土更多的被吸附.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

On the basis of the geological field investigations and isotope geochronological studies the Sm-Nd isochron age (513 Ma?0 Ma), Rb-Sr isochron age (511 Ma? Ma) and K-Ar age (312-317 Ma) of the Dapingzhang spilite-keratophyre formation in Yunnan Province are presented. From these geochronological data it is evidenced that this suite of volcanic rocks was formed in the Cambrian and the parent magma was derived from a depleted mantle, which was influenced by crustal contamination and/or seawater hydrothermal

Relevância:

10.00% 10.00%

Publicador:

Resumo:

本文通过对都龙锡锌多金属矿床的铅、锶、硫同位素地球化学特征的系统研究,揭示该矿床成矿物质具有多来源的特点:成矿金属主要来源于基底前寒武系变质岩和老君山花岗岩,硫主要来源于中寒武世热水沉积期还原的海充酸盐和深部岩浆房,同时,燕山期老君山花岩为后期叠加成矿 作用提供了硫源,变质围岩也提供了一部分成矿物质,矿石中单矿物的铷-锶等时线年龄为(76.±3.3)10^6a,反映矿床明显受到燕山晚期岩浆热液作用的叠加。

Relevância:

10.00% 10.00%

Publicador:

Resumo:

1)依据镜质组反射率(或由沥青、无定形干酪根换算成的镜质组反射率)拟合计算沉积盆地及生油层古地温是一种比较实用而又简便可行的方法。2)从十二口井井温数据分析,除X6井(2.0℃/100M)和X1井(2.05℃/100M)外,其它十口井的现地温梯度均小于2℃/100M。塔里木盆地的现地温梯度是较低的。3)拟合计算古地温的结果表明,塔B和塔A地区古地温梯度偏低半呈下降的趋势:塔B地区古生代隆起区古地温梯度为3.5℃/100M,凹陷区为3.0℃/100M,中生代古地温梯度为2.5-2.7℃/100M,新生代古地温梯度为2.0-2.2℃/100M。塔A及塔C地区:古生代隆起区的古地温梯度为3.5℃/100M,凹陷区为3.0℃/100M;中生代古地温梯度为2.5℃/100M,新生代为2.0-2.2℃/100M,今地温梯度为2.0℃/100M。4)古地温拟合计算结果表明:塔B地区志留系至二叠系地层基本被剥蚀,有的部位下古地层也遭到部分剥蚀。寒武-奥陶系总厚度在3000-4000米以上,生油层的生油期持续时间很长。寒武系底的生油期从寒武纪末到石炭纪(522-342Ma),目前普遍处在干气阶段。奥陶系底的生油期从奥陶纪末期一直持续到第三纪,90%的地区生油高峰期在泥盆纪末(早海西运动以后)之后(见图3-12),目前普遍处于凝析油-湿气阶段。塔A地区志留、泥盆系基本被剥蚀殆尽,而寒武-奥陶系基本未被剥蚀,总厚度在2000-4000米之间。寒武系底的生油期从寒武纪末期到泥盆纪(511-362Ma),至今大部分处于生气阶段。奥陶系底的生油期从泥盆纪一直到第三纪(404-40Ma),约30%的地区生油高峰期在泥盆纪末(早海西运动)之后(见图3-?),至今部分生油岩处于生气阶段。由于受加里东和海西运动的影响,塔A和塔B地区古生界地层普遍存在“二次生油”的现象。两地区石炭-二叠系一般在第三纪开始生油,生油期普遍较短。相对塔B和塔A地工而言,塔C地区受构造运动而遭剥蚀的程度要小得多。寒武-奥陶系总厚度范围为2100-8200米,因此生油层的生油期持续时间很长。寒武系底的生油期从中寒武世到石炭纪(536.5-305Ma)。奥陶系底的生油期从晚奥陶世一直到第三纪晚期(439.5-16.5Ma),仅少数地区生油高峰期在泥盆纪末(早海西运动)之后,目前大部分处于凝析油-湿气到干气阶段。石炭、二叠、三叠及侏罗系生油层目前大都处于“生油窗”内。总之,本区是塔A和塔B地区的主要油源区。5)通过对有机包裹体类型和荧光性质的鉴定、数量的统计、以及盐水溶液包裹体均一温度的测定,可以初步了解有机质热演化程度及含油气情况。6)对中生代样品,Tmax反映的成熟度与其它参数基本一致,而对于古生代样品,由于样品成熟度增大,Tmax失去指示成熟度的作用。原油和生油岩生物标志化合物反映的成熟度基本上与其它指标一致,因此在缺乏反射率资料的地区,可用生物标志化合物近似反映成熟度的变化。

Relevância:

10.00% 10.00%

Publicador:

Resumo:

The original cellulose fibers and those treated by alkaline solution were both used to prepare the acrylic membranes. The two kinds of membranes were packed into the columns for high-performance immunoaffinity chromatography by the immobilization of protein A on them. It was observed that the alkaline treatment of the cellulose fiber decreased the pressure resistance of the membrane to the mobile phases and greatly increased the accessible volume to the proteins, but affected the adsorption capacity of human IgG on the protein A membrane columns less. There is little difference between those two kinds of membranes on the adsorption capacities of HIgG, which means that the alkaline treatment of the cellulose fiber only significantly changes the void volume inter-membrane, and the porosity and surface area of membrane less. Alkaline treatment of the cellulose fiber reduced the membrane-column efficiency significantly. Some typical examples for the immunoaffinity analysis of IgG from human and dog plasma on the protein A membrane columns are illustrated. Copyright (C) 2000 John Wiley & Sons, Ltd.

Relevância:

10.00% 10.00%

Publicador:

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Three optically active Schiff-base ligands have been prepared by condensation of 2-hydroxyacetophenone with (IR,2R)-(-)-1,2-diaminocyclohexane, (1S,2S)-(-)1,2-diphenylethylenediamine or R-(+)-2,2'-diamino-1,1'-binaphthalene, respectively. The products have been characterized by their IR, H-1- and C-13-NMR spectra.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Clare, A. and King R.D. (2002) How well do we understand the clusters found in microarray data? In In Silico Biol. 2, 0046

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Urquhart, C. J., Cox, A. M.& Spink, S. (2007). Collaboration on procurement of e-content between the National Health Service and higher education in the UK. Interlending & Document Supply, 35(3), 164-170. Sponsorship: JISC, LKDN