内蒙古工业大学文献检索第3单元

第3单元

外文电子资源检索练习

学院：土木工程 班级：土木10-1班

姓名：王建赫 学号：201010606107

一. EBSCOHost检索练习

利用EBSCOHost中的Academic Search Premier或Business Source Premier数据库，查出相关课题文献。

要求：检索式中至少包含两个以上检索词，检索结果命中文献在100篇以内

◆ 检索课题（中文）：土木工程材料

◆ 检索主题（英文）：Civil Engineering Materials

二. SpringerLink 检索练习

在SpringerLink数据库中，利用 “Advanced Search”查出相关课题文献。 要求：检索式中需包含一个或两个检索词，检索结果命中文献在100篇以内

◆ 检索课题（中文）：壳体结构 ◆ 检索主题（英文）：Shell structure ◆ 检索式.（Boolean）

出版日期（publication dates）

三. Elsevier SD检索练习

利用SD数据库，在期刊(Journals)中查出相关课题文献。

要求：最终命中文献在100篇以内，并且“Advanced search”和“Expert search”不能检索完全相同的课题。

1. Advanced search

◆ 检索课题（中文）：混凝土的耐久性 ◆ 检索主题（英文）：Durability of concrete

2. Expert search

◆ 检索课题（中文）：水泥 ◆ 检索主题（英文）：Cement

◆ 选择检索结果中的任一篇文献，将相关内容填入下表。

Author

Ibrahim E. El Aassy , Afaf A. Nadab, a a

a

Mohamed M. El Galy , Mohamed G. El Feky , Thanaa M. Abd El Maksoud , Shadia M. Talaat , Eman M. Ibrahima b b

Source

Applied Radiation and Isotopes Volume 70, Issue 6, June 2012, Pages 1024–1033 The hydrometallurgy of radionuclides means getting the

Abstract

radioelements from the rocks into solution by leaching, getting the radionuclides from the solution by extraction process, and then precipitation of the desired elements to obtain concentrate. The follow-up of the radionuclides during these processes is the main target of this work to identify the identity of the original samples, pregnant solutions (leachates), residuals and the concentrate. Six samples were chosen to achieve this work. The leaching process was carried out under the conditions; 20–30% acid (H2SO4) concentration, 1:3 solid/liquid ratios, 60 min stirring time at room temperature. The activity concentrations of226 238

U,

235

U,

234

U,

Ra,

214

Pb,

214

Bi,

232

Th and K were measured in the original samples,

40

residuals and U-concentrate (Bq/kg), and leachates (Bq/ ).

The results indicate that, the radionuclides before214

226

Ra in the226 40

238

U

decay series are more leachable (released) than those from Bi in the order;234

Ra to

U> U= U

238

235

226

Ra> Pb> Bi.

214

214

232

Th and

K are

immobile under the present conditions. The radiological hazards of natural radioactivity in the original samples, leachates, residuals and U-concentrate were calculated and compared with the internationally recommended values and were found to be much higher than the world average values.

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