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1·Have you used the Periodical Index before?

你以前用过期刊索引吗？

2·After you gather a list of citations from a periodical index, check to see if your library owns that magazine or journal by searching for the title of the periodical in the library catalog.

当你从期刊索引上收集了一系列的引用时，从图书馆目录上通过搜索期刊刊名检查你的图书馆是否拥有该杂志或期刊。

3·Periodicals are very important documentary resources in the library of colleges, so the work of periodical index is an important part of information index service in the library of colleges.

期刊是高校图书馆重要的文献资源，期刊文献信息检索工作是高校图书馆信息检索服务的重要内容。

4·Stockpile availability is an important index which weighing the stockpile missile fighting function, also is an important parameter which weighting the effectiveness of missile periodical detection.

储存可使用率是衡量导弹战斗性能的重要指标，也是衡量其定期检测有效性的重要参数。

5·Basing on the statistic and analysis of the Chinese technology periodical that have been registered by the Engineering Index (EI) from 1996 to 2001, this paper gives some advices how to contribute.

本文通过对美国《工程索引》(EI) 1996 ~ 2001年收录中国科技期刊的统计分析，为广大科研工作者科学应用ei提出了建议。

6·Precise using Chinese library classification to index sci-tech periodical is discussed based on character of periodical paper.

从期刊论文的特点出发，探讨了准确规范使用《中国图书馆分类法》标引期刊论文。

7·Through the introduction of constitution of the periodical array and data base of scientific index, scientific and technological periodical quotation and evaluation norms are recognized.

通过对期刊方阵构成 ，科学指数数据库的介绍 ，认识科技期刊引证及评价指标 ；了解地球科学类期刊的划分排序及中国地震局数据中心的科学查新。

8·They are new type of passive optical components, which are based on the periodical distribution of refraction index in fiber core.

它是利用光纤材料的光敏特性在光纤的纤芯上建立的一种空间周期性折射率分布，其作用在于改变或控制光在该区域的传播行为方式。