徐海地区鹳形目鸟类的调查

报道了徐海地区鹳形目鸟的种类、分布、数量和迁徙类型，就该类鸟的某些生物学特性及其资源状况进行了探讨，并对该类鸟的保护提出几点建议。     

The periodic risk model with investment

We consider a periodic risk model with the possibility of investing into a risky asset, given by a geometrical Brownian motion. The aim is to maximize the adjustment coefficient of the risk process. It is shown that the optimal investment strategy only depends on the averaged data of the model and is constant over time. Thus maximizing the adjustment coefficient is a very weak optimization criterion.     

我国东北地区水资源现状及法律保护措施

从我国东北地区水资源现状出发,结合我国现行的水资源法律保护制度,提出了适宜于东北地区的水资源法律保护措施。     

凋谢的玫瑰——浅析《纪念爱米丽的一朵玫瑰花》的悲剧成因

从环境决定论和弗洛伊德的三重人格结构两个层面，剖析了爱米丽的悲剧成因。阴霾的住所、关爱的缺失、负心的情人和责难的居民是悲剧产生的外部因素；失衡的三重人格结构，即本我、自我和蠼我的失控是悲剧产生的内部因素。爱米丽的悲剧对于人的发展有重要的启示作用。建立、健全良好的外部生活环境和具有健康的内部心理是人得以健康成长的关键。     

清代晋北的农田水利建设与环境初探

清代晋北进入了一个相对稳定时期,在传统农业社会体制下,以农为本政策必然使晋北的农业有了一个跨越式发展,相应的农业发展在干旱半干旱地区必须要有配套的农田水利设施建设,那么清代晋北的农田水利建设状况如何,有何特点,它与当地的环境关系如何?文章从这几个方面对清代晋北的水利建设进行研究.     

基于网络环境下的自我管理学习能力对外语学习的作用

自我管理学习是网络信息时代学习的主导方式之一。它是自我组织和控制认知行为的活动,是学习者完成对学习的自我评估、自我反思和自我管理过程。通过探讨自我管理学习能力对外语学习的作用,旨在激发学习动力,提高外语学习效果。     

计算机机房硬盘保护卡的合理使用

文章根据作者多年从事计算机公共机房的组建与维护工作所积累的经验,从硬盘保护卡的安装到日常使用等方面,较详细地阐述了如何合理使用硬盘保护卡的问题。     

Optical behavior of antibiofouling additives in environment‐friendly coverglass materials for bio‐sensors and solar panels

Solar panels and bio‐optical sensors play a significant and growing role in a number of applications that are of importance to many organizations. Many of these instruments require a high transmission of radiation into the device for it to work properly. A major issue faced is that harsh marine environments often aid in the growth or development of fouling on the coverglass used to protect the instruments. Over a period of time in an ocean environment, some plant or animal may attach itself to the coverglass, ultimately obscuring the glass and rendering the instrument useless. As such, an antifouling mechanism is needed for these instruments that is inexpensive, long‐lasting, and environment friendly. The approach discussed herein involves the use of known antifouling chemicals which have been incorporated into the polymer matrix. Polymethylmethacrylate (PMMA), bisphenol A polycarbonate (Bis A PC), and a co‐polyterephthalate (CPTE) were examined. The plaques are optically transparent and previous work has shown that, for most samples, the materials display a minimal decrease in mechanical behavior upon the addition of the algaecides. This paper will discuss the effects on the materials' optical properties when exposed to both harsh marine conditions as well as high intensity UV light. Specifically, the decrease in transmission of visible light was examined over a 6 month period of time. Copyright © 2008 John Wiley & Sons, Ltd.     

海南旅游业发展与生态环境的关系研究

在简要介绍海南旅游资源的优势和海南旅游业发展现状的基础上 ,采用统计分析方法 ,以定量与定性研究相结合的方式 ,对海南省旅游业发展的区域性特点、旅游业发展与环境 ,以及旅游业发展与农业的关系等问题进行初步探讨 ,针对性地提出实现海南旅游业可持续发展的一些对策和建议 .     

欧美企业战略理论研究的一些新进展述评

简要地述评欧美四位学者最近的研究成果。它们代表着企业战略理论研究的新方向，对我们具有一定的借鉴价值。其中，Ｃｈａｋｒａｖａｒｔｈｙ教授强调企业环境是动荡的，并提出对付动荡的战略框架；Ｂａｒｏｎ教授强调非市场环境对企业活动的重大影响作用，提出了非市场战略系统和租金链概念框架；Ｍｉｌｓ教授归纳总结了美国的大公司近年来战略失败的主要原因；Ｋｒｅｉｋｅｂａｕｍ教授则一般性地论述了战略计划进一步发展的方向