基于现金流量法的企业外汇风险暴露度量研究

随着中国企业国际化程度的提高,由汇率波动所带来的企业价值变化的外汇风险将越来越大。因此,如何准确而简约地衡量企业外汇风险是一个亟待解决的问题。从这个角度出发,通过实证研究发现现金流量法能较好地度量中国企业的外汇风险暴露。     

RxNorm多词表语义互操作机制研究

信息系统的语义互操作是网络环境下知识组织系统建设与应用中面临的重要课题。在药学领域,RxNorm是具有代表性的语义互操作支持工具。文章通过系统分析RxNorm知识组织方式,从概念表示、属性继承与规范化、多层次术语类型和结构化语义网以及数据存储方式等多方面来解析RxNorm多词表语义互操作的实现机制,列举典型应用实例,并提出对其成功经验的一些思考。     

Effect of lead exposure on the immune function of lymphocytes and erythrocytes in preschool children

INTRODUCTION Over the past few years, systematic studies onthe effect of lead exposure on the human body haveled to an understanding that lead is neurotoxic andhas adverse effect on the immune system. So far,however, research on the immunotoxic effects oflead has been limited to animal experiments andpeople with occupational exposure to lead (Shen etal., 1996; Mishra et al., 2003; Liu et al., 2000).Presently, there are no reports on the influence oflead exposure on lymphocyte and …     

关于词汇刻意学习的实证研究

本文通过词汇实验来检测刻意词汇学习和伴随词汇学习哪种学习方式更有效,更持久。实验得出的数据显示: 刻意学习比伴随学习更适合高校非英语专业二年级学生,是他们主要的词汇学习方式,而且更有持久性。     

Visualizing the Virtual Library

In my article "Planning the Virtual Library," published in the last issue of the Medical Reference Services Quarterly, visioning was included in the implementation process. Visioning is such a critical component, however, that I wanted to provide a follow- up article that would vividly illustrate its importance. Eugenie Prime needs no introduction to the medical librarian community; she is well known for her many years of work with CINAHL¹ and with the Medical Library Association. Since 1987, Eugenie has been the Manager of the Corporate Libraries at Hewlett-Packard Laboratories, the research and development component of HP.     

影响血液尿素测量值的实验室因素

观察了实验室自然光照对二乙酰一肟法测定血尿素结果的影响。发现光照对测量结果有显著影响。提示测量过程中要避免室外光直接照射