查询词典 Gd

Purpose: To study MRI findings of tumor-like cerebritis and the diagnostic value of Contrast Enhancement MRI.

目的：研究肿瘤样脑炎的MRI表现和Gd－DTPA增强的诊断价值。

The quick production of the circular arc is an important subject in CAD/CAM and CAGD.

圆弧的快速生成问题是 CA D/CAM、CA GD等领域中一个重要的课题，不仅具有理论研究价值，而且有着广泛的应用。

Fibrations of congruence of lines and applications of sections ;2. The few group section is calculated for several in core assemblies,and the parameter section table is ordered by different Gd 2O 3 weight percent, burnup, energy group, and then the necessary sections for in core burnup are calculated with function .

本文介绍的组件均匀化参数计算的处理方法是以先进的燃料组件软件包TPFAP为基本工具，对于堆内各种类型组件计算少群截面，按Gd2O3不同重量百分比、比燃耗、能群等顺序组成参数截面表，再用函数插值法求得全堆燃耗计算所需的截面。

Purpose:To evaluate the value of gadolinium-enhanced MRI in the diagnosis of cerebral cysticercosis.

目的：评价Gd-DTPA增强磁共振成像对脑囊虫病的诊断价值。

Gadolinium-enhanced MRI plays an important role in the diagnosis of the cerebral cysticercosis.

Gd-DTPA增强在脑囊虫病的诊断中应列为常规序列。

Nd and Y showed more evident effects than Gd and La due to lower temperature of eutectic reaction with aluminum. In order to investigate mechanism of the formation of the intercellular dispersoid which is being in debate and possibility of suppressing the dispersoid, a nucleation kinetic model which including unsteady nucleation and effect of alloy element was established.

Al-Fe-Mo-Si-Zr-Ti合金粉末具有四种凝固组织，初生Al〓〓，α-Al与Al〓共晶，胞晶及显微胞晶，合金元素Mo的加入，显著提高合金粉末凝固前的过冷度，使10~40μm粉末的凝固机制发生了变化，由导热控制型转变成溶质扩散控制型，从而基本上消除了该尺寸范围内粉末凝固组织中共晶成分和初生相，但对大于40μm的粉末，因共晶区富Zr核心的优先形成而使Mo的作用效果不明显。

Lanthanides belong to the sixth cycle of the periodic table Ⅲ B family, are all solid metal, they are La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, holmium, erbium, thulium, ytterbium, and lutetium were 15 kinds of metals and their periphery are two layers of electronic 5d16s2, while the peripheral third layer f orbital but never zero to 14, so the external electronic structure of 4f0-145d16s2, and therefore these elements in oxidation number are to 3, very close chemical properties, extraction, when it is difficult to separate them they are mostly multi-element mineral mix, more difficult to increase refining, and their atomic number of 57-71, one by one to increase the number of protons the nucleus, and thus extranuclear electron of gravity is also growing, so that atomic radius decreases with increasing atomic number Z, which makes lanthanides contraction, ionic radius is also reduced, which also makes Zr, Hf, Nb and Ta, Mo and W, the atom and ionic radius very close to each other they also determine a similar nature, resulting in difficult separation, also the tribe Ⅷ of the fifth cycle, ruthenium, rhodium, palladium, and the sixth cycle, osmium, iridium, platinum is very similar in nature, thus The six elements, said platinum group elements.

镧系元素属于周期表第六周期中ⅢB族，全部是固体金属，它们是镧、铈、镨、钕、钷、钐、铕、钆、铽、镝、钬、铒、铥、镱和镥共十五种金属元素，它们的外围两层的电子均是5d16s2，而外围第三层的f轨道电子却从零增加到14个，所以外围电子结构为4f0－145d16s2，而使这些元素氧化数均为＋3，化学性质极为接近，提炼时很难分开，它们的矿石又大多是多种元素混在一起的，更增加提纯难度，它们的原子序数为57－71，核内质子数逐个增加，因而对核外电子引力也不断增强，使原子半径随原子序数Z增加而减小，这就使镧系元素收缩、离子半径也缩小，这也使得Zr和Hf，Nb和Ta、Mo和W等原子和离子半径都很接近、也决定了它们彼此性质类似，以致难以分离、也使第Ⅷ族中第五周期的钌、铑、钯和第六周期的锇、铱、铂在性质上极为相似，因而称这六个元素为铂系元素。

Cu-Ag-Ce in situ filamentary composite with good combination of high-strength and high-conductivity was prepared.

研究了稀土添加剂Ce、Y和Gd对Cu-Ag原位纤维复合材料结构和性能的影响，制备了具有高强度和高导电性相结合的Cu-Ag-Ce原位纤维复合材料。

Influence of trace rare earth additives such as Ce, Y and Gd on microstructure and properties of Cu-Ag in situ filamentary composite was studied in this paper.

作者： 张晓辉1，闫琳1，宁远涛2单位： 1。北京有色金属研究总院有研亿金新材料股份有限公司，北京 100088；2。昆明贵金属研究所，云南昆明 650221

Manager - cached thumbnails, filmstrip view, delete, create folders, uploads.

管理器提供了-缓存了缩略图像(JPEG， PNG，依靠GD的GIF)，幻灯片视图，删除，创建文件夹，上传。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷