稀土金属

The HEED, XRD, and XPS results confirmed the forming of intermetallic compounds between silver and rare earth. As far as silver and lanthanum be concerned, the format of intermetallic compound is AgLa.

由此，本文首次提出了稀土元素在稀土金属间化合物中的能量传递模型，认为稀土与银金属间化合物的4f能级位于费米能级附近下方，部分局域化且与导带部分耦合。4f能级与导带能级之间的电子跃迁是稀土元素在Ag-BaO薄膜中传递能量的方式，也是光电发射增强效应的来源，而4f电子的光吸收截面随入射光子能量的增加而增大的特点则是"蓝强"现象的原因。

The study of this thesis enlarges the application of rare earths metal- samarium in organic synthesis that has quite important meaning for our country having abundant rare earths resources. It promotes to explore the new use of rare earths metals in organic synthesis. There will be a great break in the theory and application of the production of carbene.

通过本研究扩大了稀土金属钐在有机合成中的应用范围，这对于我国具有丰富的稀土资源(贮量占世界总贮量的85%以上，稀土金属产量及质量占世界首位)而言，促进开发稀土金属在有机合成中的新用途，具有十分重要的意义；并在产生卡宾的理论上有所突破，填补了卡宾研究领域的空白，取得一些极具价值的学术成果。

We composed the active cyclostyle polymerand then inserted the rare-earth to the cyclostyle polymer by sol-gel method. Then weprepared the new type nanometer oganic rare-earth compounds.

我们设计合成了纳米稀土金属溶胶和活性模板聚合物，然后用溶胶-凝胶法在活性模板聚合物上导入纳米稀土金属化合物，进而制备了新型纳米有机稀土金属复合物。

The polymer carriers,the immobilization of rare earth compounds,the properties of polymer-supported rare earth metal complex es and their catalytic characteristics in the polymerization of diene was reviewed with 25 references.

对聚合物载体的合成、稀土金属化合物的固定和聚合物载体－稀土金属络合物的性质及其催化双烯烃聚合的特征进行了论述。

This paper shows the principle and current application situation of unsalable LaCe/LaPrCe misch metal regarded as additive in aluminum,magnesium,zinc,copper,steel and alloy,mainly illustrates the application progress of magnesium alloy AE44 with high-performacec,low cost and great heat-resistant property by replacing Cewith LaCe/LaPrCe misch metal,and reportes the application of LaCe/LaPrCe in nickel hydrogen electrode cathode material.

综述了我国大量滞销的轻稀土资源LaCe/LaPrCe混合稀土金属作为添加剂在铝、镁、锌、铜、钢及其合金中的作用机理及其应用现状；重点阐述了用LaCe/LaPrCe代替富铈混合稀土金属作镁合金主要成分，开发出高性能、低成本、新型耐热镁合金AE44研发工作应用进展；报导了LaCe/LaPrCe在镍氢电极负极材料应用及组装成氢镍电池的简况。

Under the protection of purified water-free, oxygen-free argon, using Schlenk technique, the rare rarth organometallic complexes containing piperonal dimethyl acetal and dicyclopentadienyl and involving silylene-bridged fluorenyl have been synthesized.

合成了含胡椒醛二甲基缩醛基和二茂基稀土金属有机配合物。采用Schlenk技术，在干燥纯氩气保护下进行。将溴代胡椒醛二甲基缩醛基锂盐与二茂基一氯稀土（Ln：Yb，Dy，Pr，La，Sm）反应，形成5个新的文献未曾报道的稀土金属有机配合物。

Occurrence of RE hydride was identified in the Al-Si alloy containing RE andenrichment of hydrogen in polynary RE intermetallic compound was determined by means ofEPMA, secondary ion mass spectrography, Hg-free vacuum drivepipe hydrogen-meter to-gether with metallography and porosity measurement.

采用电子探针、二次离子质谱、无汞真空套管测氢仪等检测手段，并配合金相分析及试样孔隙度的测定，鉴定出含稀土的Al-Si合金中有稀土氢化物的存在，确认在多元稀土金属间化合物中氢的富集，提出稀土具有较强固氢作用的观点。

Rare earth organometallic chemistry is closely interrelated with materials science, organic synthesis, life science. Rare earth organometallic complexes containing Ln-C σ bond and involving silylene-bridged fluorenyl are of important significance in macromolecular and asymmetry organic synthesis.

稀土金属有机化学与材料科学、有机合成、生命科学等学科密切相关，含Ln-Co键稀土金属有机配合物和含硅桥配体稀土金属有机配合物在高分子和有机合成不对称催化领域具有重要意义。

The catalyst is composed of at least one transition metal or transition metal alloy supported on the rare-earth metal oxide, the content of each component: transition metal or transition metal alloy 0.1-99%, and rare-earth metal oxide

催化剂由至少一种过渡金属或过渡金属合金担载在稀土金属氧化物上组成，各组分含量为过渡金属或过渡金属合金0.1～90.0％，稀土金属氧化物10.0～99.9％。

The calculations on the binding energy and the population analysis of the ribose-Ln complexes were made by using the coordinates obtained from its single-crystal structures. Theoretical interpretions on the coordination between ribose and rare-earth metal ions were given by the results of the calaulation.

利用本论文得到的一系列的核糖—稀土配合物的单晶结构数据，对各配合物分子的结合能、配合物中各原子的净电荷布居以及稀土金属离子中各原子轨道在成键中的作用等方面内容进行了量子化学计算，并为核糖与稀土金属离子的配位作用提供了理论解释。

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如果你不幸失恋了，请告诉我，我会帮助你摆脱困境，真的，请联系我啦！

China's plan to cut energy intensity by 20 percent and pollutant discharges by 10 percent between 2006 and 2010 is a case in point.

中国计划在2006年到2010间降低20%的能源强度和减少10%的主要污染物排放，就是一个这样的例子。