稀土

It has been shown that the compound treatment can not only result in a considerable degree of desulfuration and cleanliness of steel, but also bring unique inclusion mordifyingeffect of RE into full play: Harmful effects of inclusions to the performance of steel can be eliminated by Rare Earth additions through formation of dispersively distributed, undeformable and stable Rare Earth sulphide and oxysulfide in place of elongated MnS.

结果表明：复合处理不仅可以脱硫、净化钢液，而且充分发挥了稀土的变质夹杂物的特性：稀土金属可以将钢中原有的条状硫化锰夹杂转变为在钢中均匀分布、不易变形的、稳定的球形稀土硫化物和硫氧化物，从而可以消除夹杂对钢材造成的不利影响。

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。

In this new technology,on the basis of substituting flotation froth of high intensity scavenger concentrate for high intensity middlings,the desired RE concentrate can be obtained easily,which does not take any special measures of removing surplus reagents and adopts the current technological process taken by workshop of RE ore dressing,and the cost of flotation reagents per ton RE concentrate can also be reduced about 50%.

将生产中所用的稀土浮选原料强磁中矿更换为强磁扫选精矿的反浮泡沫，不需特别的脱药措施，只采用稀选车间现有的工艺流程和浮选药剂组合方案，即可获得所需的稀土精矿，使每吨稀土精矿的成本降低一半左右。

In addition, the second rare earth, such as Tb〓、La〓、Gd〓 and Y〓, was separatively doped in the europium carboxylic complex and replaced some europium ions. The luminescence properties were discussed to research the effect of the second ions to europium ions.

本文将第二种稀土离子Tb〓、La〓、Gd〓和Y〓分别掺入到铕的羧酸配合物中，让第二种稀土离子部分取代铕离子，并详细地研究了不同含量的第二种稀土离子对中心发光离子铕荧光性质的影响。

These subvolcanics, in which basalt, basaltic andesite and andesite are dominant, are petrochemically of calc alkaline affinity of subalkaline series and sodic type, and tend to have moderate low total REE, being LREE enriched.

岩石化学上属亚碱性系列、钙碱性火山岩系、钠质类型；稀土总量中低，属轻稀土富集型，稀土分布模式为右倾平滑曲线或略有正、负铕异常；过渡族元素球粒陨石标准化曲线形态呈&W&型，锶初始值为 0 。70 5398，反映物质来源较深。

Through the addition of rare earth oxidation La_2O_3 and CeO_2 into the electrode coating , the effect of rare earth oxidation on high temperature oxidation and sulphidation resistance is studied and the rational addition amount is suggested.

通过A402，A302，A202及Cr24Ni7不锈钢焊条熔敷金属的抗高温氧化腐蚀性能对比试验分析，设计了新的专用焊条合金系统Cr26Nil6，并在焊条药皮中分别添加微量稀土氧化物La2O3及CeO2，研究不同稀土氧化物添加量对焊条熔敷金属在空气中和含硫气氛中抗高温氧化及腐蚀性能的影响，从而确定了合理的稀土氧化物加入量。

Rare earth complexes can coordinated to the surface of sulphonated polystyrene microspheres when the content of EuCl〓 was not saturated. Rare earth complexes may aggregate when the content of EuCl〓 exceed to saturation.

当EuCl〓的含量未达到配合的饱和程度时，稀土配合物均匀地配合在PS微球表面，而当稀土配合物的含量超过微球表面的配位能力之后，稀土配合物就会发生团聚。

In this dissertation, two series of rare earth initiators: rare earth tri (2, 6-di-tert-butyl4-methylphenolate) and rare earth calixarene complex have been developed to ring-opening polymerize 2, 2-dimethyltrimethylene carbonate, trimethylene carbonate and ε-caprolactone at mild conditions. Both the polymerization features and mechanisms are discussed in details.

本论文为环碳酸酯、内酯的开环聚合开发了两类新型低毒性稀土催化剂：三(2，6-二叔丁基-4-甲基苯氧基)稀土配合物和对叔丁基杯芳烃稀土配合物，都可以在温和的反应条件下单组分引发2，2-二甲基三亚甲基环碳酸酯、三亚甲基环碳酸酯和ε-己内酯聚合，合成各种分子量的均聚和共聚材料，考察了催化剂结构、聚合条件等对聚合的影响，深入研究了聚合机理。

The results indicated that: Tripyrazolone, tripodal and crptands ligand L〓, L〓 and L〓 have good coordination ability with rare earth ions Rare earth ions were coordinated with their oxygen and nitrogen atoms.

结果表明，三脚架结构吡唑啉酮、三酸和穴醚配体与稀土离子有较好的配位作用，它是通过氮原子、氧原子与稀土离子配位的。而穴醚配体与稀土离子配位效果却不好。

As for the tripodal ligand DBIMPY, its lanthanide complexes includingantipyrine have higher emission quantum yields than others, and its nitrate-coordinated series have higher emission quantum yields than those of the chlorideseries in 〓.

2对于三脚架配体DBIMPY，在〓溶液中，其含安替吡啉的稀土配合物有相对更高的量子产率，并且其稀土硝酸盐配合物比相应的稀土氯化盐配合物有更大的量子产率。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。