查询词典 rare earth metal

The results show that mechanical heterogeneity has great influence on the J-integral of welded joint containing transverse crack. The J-integral on the path cross the interface between welded joint and base metal is higher than the J-integral on the paths in the weld metal for undermatched joint,while the J-integral on the path cross the interface between weld metal and base metal is lower than the J-integral on the paths in the weld metal for overmatched joint. Moreover,the difference of J-integral values increases with the increasing of the load and strength mismatching difference and the path-enclosed length of interface between weld metal and base metal.

计算结果表明：力学不均匀性对含横向裂纹焊接接头的J积分有重要影响，低匹配焊接接头中积分路径穿越焊缝与母材界面的J积分值高于积分路径在焊缝内的J积分值，高匹配焊接接头中积分路径穿越焊缝与母材界面的J积分值低于积分路径在焊缝内的J积分值；载荷越大，焊缝与母材的强度差别越大；积分路径中包含的焊缝与母材界面长度越大，J积分的差值越大。

1St, foreword main point: A, about Earth's internal heat circulation as well as successional variation process three important times: Birth time, lifeless time, until has the life time; B, the earth interior stone fruits archery target thermonuclear reaction, causes the earth interior material convection and the Earth revolve production as well as terrestrial magnetic field production three between relations; C, also has in has the life time, the vital activity to the entire internal heat circulation influence as well as to the earth's atmosphere influence; D, has the life time, in the stratum the coal and the petroleum, the natural gas and so on the fixed energy storage which as a result of energies and so on zoology and botany absorption transformation sunlight forms, to Earth internal heat circulation influence as well as with earth's crust each kind of movement relation, such as: The plate movement, the volcanic earthquake, the orogenesis, the Earth moves the fierce degree the periodic phenomenon and so on.

前言要点： A 、关于地球的内热循环以及演变过程的三个重要时期：诞生时期，无生命时期，直至有生命时期； B 、地球内部核物质的热核反应，引起的地球内部物质对流与地球旋转的产生以及地球磁场的产生三者之间的关系； C 、还有在有生命时期，生命活动对整个内热循环的影响以及对地球大气的影响； D 、有生命时期，地层中煤与石油、天然气等由于动植物吸收转化太阳光等能量而形成的固定能量存储，对地球内热循环的影响以及与地壳各种运动的联系，诸如：板块运动，火山地震，造山运动，地球活动剧烈程度的周期性现象等。

Basanite and tephrite from Mt. Crater, Cape Bird and Bonney Lake exhibit similar composition in major elements and trace elements, rare earth elements . They are enriched in MgO, TiO〓, transitional elements and compatible elements , and depleted in SiO〓, Al〓O〓, Na〓O, K〓O, incompatible elements and rare earth elements; Latite from Cape Rodeys and Cape Evens are different from basanite and tephrite, they are enriched in SiO〓, Al〓O〓, Na〓O, K〓O, incompatible elements and rare earth elements, and depleted in Mgo, TiO〓, transitional elements and compatible elements. Volcanic rocks in five regions have the same isotopic ratio of 〓Sr/〓Sr (0.703115-0.703334) and 〓Nd/〓 Nd (0.512892-0.513076), however,〓Pb/〓Pb ratio in volanic rocks from Mt. Crater, Cape Bird and Bonney Lake is lower than those of Cape Rodeys and Cape Evens.

在主元素氧化物和微量元素、稀土元素含量上，克雷克特山、鸟角和博尼湖南岸的碧玄岩、碱玄岩成分比较类似，均具有较高的MgO、TiO〓、过渡元素和相容元素，较低的SiO〓、Al〓O〓、K〓O、Na〓O、不相容元素和稀土元素；罗德角和伊万思角安粗岩雷同，它们具有较高的SiO〓、Al〓O〓、Na〓O、K〓O、稀土元素和不相容元素，较低的MgO、TiO〓、过渡元素和相容元素，但五地区火山岩几乎具有一致的Sr、Nd同位素比值，〓Sr/〓Sr＝0.703115-0.703344、〓Nd/〓Nd＝0.512892-0.513076，在Pb同位素比值上，五地区的〓Pb/〓Pb＝18.664-19.913，其中碧玄岩和碱玄岩比安粗岩的比值稍低。

Especially, the development of Ni-MH high-power battery and high-power rare earth hydrogen-storage alloy materials not only complies with the industrial policy on rare earth resource fine processing in China, but also became a key national science project – associated project for electromotion automobile industry; it's the pivot high-tech industry backed by the government and it will also accelerate the transformation of China's abundant rare earth resources to technical and economical advantages; and it will also impel the development of relative industries. Therefore, it plays a critical role to create more economic and social benefits.

特别是镍氢动力电池用低成本、高功率稀土贮氢合金材料的开发，不仅符合我国稀土资源深加工的产业政策，也是国家重点攻关项目——电动汽车产业化的配套项目，是国家重点扶持的高科技产业，将促进我国丰富的稀土资源优势转化为技术经济优势，带动相关产业的发展，具有十分重要的经济效益和社会效益。

The gabbro-diorites have high light rare earth elements, low heavy rare earth elements and weakly positive Eu anomalies in chondrite-normalized rare earth element curves, and with high LILEs and relative low HFSEs in primitive mantle-normalized trace element spider diagram.

稀土元素球粒陨石标准化曲线显示其具有富含轻稀土元素、贫重稀土元素以及微弱的Eu的正或负异常的特点。微量元素原始地慢标准化蛛网图上，岩体具富含大离子亲石元素，明显亏损高场强元素（Nb、Ta、Zr、Hf和Ti）等特点。

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。

In order to investigate the relation between the ligands and rare earth ions, in this dissertation, two new polyaza cryptands, two new tripyrazolone ligands, a macrobicyclic rare earth cryptates, a tripyrazolone and a tripodal ligands rare earth complexes have been synthesized.

为了进一步研究和探讨穴醚、吡唑啉酮、三脚架化合物配体对稀土元素的配位作用，论文首次报道了两个新氮杂穴醚配体、两个新三脚架吡唑啉酮结构配体、一个系列大二环新型的稀土配合物、一个系列三脚架吡唑啉酮结构配合物、一个系列三脚架结构三酸配合物的合成。

Some essential trace elements were reported to be involved in the normal bone metabolism. Nowadays rare earth elements are widely used in many fields and more and more rare earth elements enter the environment and food chains They are enriched in bone and difficult to be excreted. Because the similarity between rare earth ions (Ln3+) and Ca2+, they will intervene and regulate bone formation and remodeling.

骨骼的正常代谢涉及多种金属离子，随着稀土的应用，通过环境和经由食物链等渠道进入人体内的稀土量也有所增加，并且在骨组织中相对富集且难排出；由于稀土与钙离子的相似性，它们将干预和调控骨的形成与再造。

Some essential trace elements were reported to be involved in the normal bone metabolism. Nowadays rare earth elements are widely used in many fields and more and more rare earth elements enter the environment and food chains. They are enriched in bone and difficult to be excreted. Because the similarity between rare earth ions Ln(superscript 3+ and Ca(superscript 2+), they will intervene and regulate bone formation and remodeling.

骨骼的正常代谢涉及多种金属离子，随着稀土的应用，通过环境和经由食物链等渠道进入人体内的稀土量也有所增加，并且在骨组织中相对富集且难排出；由于稀土与钙离子的相似性，它们将干预和调控骨的形成与再造。

From the coupled simulation optimization result analysis, the 10KA drained cathode rare earth electrolysis cell may be used trying to produce in the rare earth electrolysis industry, the new direction for the new rare earth electrolysis cell structure research has been opened.

从仿真优化结果分析，该槽型可以用于稀土电解的工业试生产，这为新型稀土电解结构的研究开辟了新方向。

As of Tuesday, Google's results were still censored in China.

截至周二，谷歌的搜索结果仍受中国审查。

In order to make the positive action increase and negative one decrease, the sub-forces of the social factors must be adjusted to form a centripetal force.

在这一过程中，人的主体性发挥是社会有机体健康发展的灵魂。