我国石油企业跨国经营战略的探讨

石油企业走出国门，实施跨国经营，是解决我国国内油气资源供求矛盾加剧的必然选择，也是维护和保障我国石油安全乃至国家经济安全的必由之路。文章探讨了我国石油企业国际化经营的必然性及其动因，进一步分析了目前我国石油企业国际化经营的发展现状，在此基础上提出了我国三大石油集团实施“走出去”战略的八项对策。     

How Do Institutional Investors Affect Corporate Performance? Evidence from Private Placements in China

Using data on private placements in China from 2007 to 2014, we show that abnormal returns of issuing companies’ stocks are significantly positive on the announcement day, but they become significantly negative during the event window [?20, +20]. Participation by institutional investors has a significant and negative impact on the short-term stock returns. This negative effect is also present in issuing companies’ long-term stock returns and profitability. Furthermore, we find that participation by institutional investors reduces dividend payments after private placements. Overall, our findings do not support the monitoring hypothesis of institutional investors’ role in corporate finance but are consistent with the management entrenchment hypothesis and shareholder pessimism hypothesis.     

An integrated system for information security management with the unified framework

Information security management plays an essential role for drawing the roadmap of information security; thus, many theoretical methodologies and practical standards are brought into this domain. However, many standards and methodologies are too cumbersome to be adopted by an organization. Additionally, there is no unified framework to systematically handle the tedious tasks of information security management. This study’s primary goal is to design an integrated system for information security management (ISISM) that aims to use current methodologies and standards to solve the above-mentioned issues. Because business impact analysis and risk analysis are the most important areas within this domain, we carefully select the related methods and then integrate them into a unified framework, upon which the proposed ISISM depends. To achieve this outcome for this study, security requirement engineering is adopted, which enables the designed system to support system users in generating risk assessment reports with related information security policies.     

铁离子、亚铁离子变化对工业锅炉酸洗的影响

介绍工业锅炉酸洗中铁离子的来源,并以实例说明酸洗中应强化对铁离子、亚铁离子(Fe3+、Fe2+)的化学监测,使锅炉酸洗安全进行,及终点的判断。     

茶叶仓储环境监控系统的设计

针对茶叶储存过程中变质以及人工监管不到位问题,设计了茶叶仓储环境监控系统,实现了对茶叶仓储环境的实时监控、报警提醒以及数据保存的功能,达到节省人力资源、减少变质损失的目的。     

经济学视角下自然保护区有效管理行为研究——以甘肃白水江自然保护区李子坝社区为例

以甘肃白水江自然保护区李子坝社区巡护监测为例,从经济学的视角,运用比较优势和竞合模型分析该社区巡护监测与专业巡护监测的两种行为。模型分析显示两者各有优势,在专业巡护监测的基础上,如果辅之以社区巡护监测能更有效地促进环境与生物的多样性的保护,既可以提升有效管理的水平,又可以达到社区保护利益的最大化。     

我国能耗监测管理现状及未来发展趋势

适应节能形势发展的新变化,能耗监测的内涵也正在逐步延伸。实践表明,建立有效的能耗监测管控体系,对于提高能效、推进节能减排作用明显。近年来我国能耗监测管理得到了不同程度的改善,但在管理理念、制度安排、技术创新、资金支持等方面还存在着较多问题。利用信息技术,建立能耗在线实时监测管理体系,将成为未来能耗监测的发展目标。适应这种发展要求,我国需要在计量设备基础管理、能耗监测考核制度、监测机构设置和人员培训、资金渠道等方面进行不断创新。     

The impact of population growth and climate change on food security in Africa: looking ahead to 2050

Providing nutritious and environmentally sustainable food to all people at all times is one of the greatest challenges currently facing society. This problem is particularly acute in Africa where an estimated one in four people still lack adequate food to sustain an active and healthy life. In this study, we consider the potential impact of future population growth and climate change on food security in Africa, looking ahead to 2050. A modelling framework termed FEEDME (Food Estimation and Export for Diet and Malnutrition Evaluation) was used which was characterized to model the impacts of future climate changes (utilizing the Intergovernmental Panel on Climate Change Special Report on Emissions Scenarios projections) and projected population growth on food availability and subsequent undernourishment prevalence in 44 African countries. Our results indicate that projected rapid population growth will be the leading cause of food insecurity and widespread undernourishment across Africa. Very little to no difference in undernourishment projections were found when we examined future scenarios with and without the effects of climate change, suggesting population growth is the dominant driver of change. Various adaptation options are discussed, such as closing the yield gap via sustainable intensification and increasing imports through trade and aid agreements. These strategies are likely to be critical in preventing catastrophic future food insecurity.     

基于SWOT分析理论的施工企业安全管理要点

针对近几年施工企业安全形势严峻,安全管理急需转型的形势完成本文。本文通过对企业安全管理的内部能力与外部因素运用SWOT分析,阐述了施工企业安全管理战略从过去突击式的安全大检查到以预防为主的危险源辨识管控的转变。     

主通风机在线监控系统中的抗干扰措施研究

主通风机在线监控系统中的数据容易受到强电磁环境中的电磁干扰而产生数据失真,为此本文着重探讨主通风机在线监控系统中抗干扰措施,包括硬件抗干扰和软件抗干扰措施,为该监控系统的可靠运行提供了一种新的解决方法。