浅析天然气场站运行过程的安全管理

随着天然气应用的日渐广泛,保证安全平稳输气,确保天然气场站的安全运行就显得尤为重要,分析了天然气场站在运行过程中存在的两类危险源,并重点从完善安全管理机制、加强员工培训、优化设备管理、优化场站选址等4个方面讨论了场站运行过程中安全管理的方法。     

天然气场站电气自动化设备安全运行策略探究

随着我国社会经济的不断发展,人们的生活方式正在发生很大的变化,因此,对于能源需求也在不断变化,天然气已经成为人们生活中所需的一种重要能源,为了保证天然气的正常有效供应,天然气场站正在推进电气自动化运行,这就需要保证电气自动化设备的安全。文章将结合影响天然气场站电气自动化设备安全运行的因素,探讨全面加强天然气场站电气自动化设备安全运行的有效策略。     

无人值守天然气调压站的功能实现及安全防护管理

人工智能技术的发展为实现天然气调压站的无人值守管理提供了可能,依靠智能化的数据采集与监控系统可将有人值守的天然气调压站实现无人值守,减少了运营成本,提高了场站管理效率。文章针对无人值守天然气调压站的功能实现方式及安全防护管理方式进行了分析,为无人值守天然气调压站的运行管理提供了参考经验。     

天然气输气管道泄漏事故风险分析

天然气输气管道的安全运作和千家万户都是息息相关,所以安全是其运营的基础。文章主要针对天然气输气场站和输气管道本身所涉及的影响管气系统是否安全平稳有效的运行的主要风险问题进行分析,并提出合理有效的建议。     

基于SCADA系统的天然气模拟调度指挥培训平台系统

近些年天然气专业人才需求量逐年攀升。城市安全技术与管理专业是某学院的特色专业,为了更好满足学校专业教育教学人才培养的需要,完善实训室的建设,公司组建了一个天然气管网实训中心。内部实际模拟出天然气场站系统及天然气调度中心系统,从硬件到软件平台系统完整模拟出实际天然气管网效果,从而达到模拟实训,真实教学的目的。该方案针对学校教学要求而制定,尽最大可能还原调度中心与场站现场情况,帮助学生了解天然气场站及调度中心SCADA系统的运行情况,提高学生素质。     

浅析天然气长输管道清管作业工艺

随着下游用户的不断增加,天然气长输管道负荷也随之不断增加,为了确保长输管道安全平稳运行,需要对管道进行定期清管.由于天然气自身易燃易爆的性质及天然气管道运行压力较高等原因,清管作业存在许多风险.为确保清管作业安全,需要收发球小组、沿线场站、阀室、各监听点积极配合.     

石油天然气场站安全管理探析

安全管理工作始终是项目工程建设、生产中的一个重要环节,无论何种企业经营发展均应将安全管理视为核心的基础性工作。本文就石油天然气场站安全管理工作展开进一步分析,针对实践工作存在的问题制定科学有效的应对策略,对全面提升石油天然气场站安全工作水平,有着重要的实践意义。     

天然气站场防爆电气设备存在问题及措施

防爆电气设备为天然气场站缺一不可的生产辅助设备，主要实现检测、监控、控制、应急切断等功能。天然气爆炸危害较大，且存在硫化氢气体泄漏中毒风险，防爆电气设备安全工作性能是天然气安全生产过程的关键控制因素。针对防爆电气设备管理存在引入装置等问题进行总结分析，提出管理措施。     

天然气场站生产安全人员配置优化研究

文章结合揭阳地区某支线管道实际运行情况,对天然气管道无人值守场站生产安全人员存在的问题进行综合原因分析,对后期生产安全人员配置提出具体的建议措施。经过优化,生产安全人员配置进一步合理,为后期无人值守场站安全平稳运行提供了坚实的人员基础。     

天然气压缩机的管理与维护

在压缩机站、设备安全运行是管理工作的基础,而油品管理,水质达标,合理操作规程,预知维修是设备安全运行的必要手段。如果不能进行设备的管理与维护,即使再好的设备也不能充分发挥其作用,甚至会造成维修频繁,不能做到优质、高效、低耗运行。实现天然气压缩机的管理与维护,将对压缩机站的现场安全管理及延长设备使用寿命、减少故障有着重要意义。     

Divergent patterns of engagement in Internet standardization: Japan,Korea and China

This article analyzes the engagement of Japanese, Korean and Chinese participants in the development of Internet standards at IETF on the basis of four quantitative metrics: attendance, patenting, authorship and leadership. The results are strikingly divergent. Japanese involvement in Internet standardization began early and Japan was, for many years, second only to the U.S. in terms of IETF participation. Though Japanese participation has declined since the early 2000s, Japan remains a major contributor to IETF standardization. Korean involvement in IETF has always been significant, but below the levels of Japan and major European countries. Korean participation in IETF has also declined over the past decade, and has been dominated by one firm, Samsung. Though meaningful Chinese involvement in IETF did not begin until the mid-2000s, it has rapidly expanded in recent years. Today, China is a major player in numerous areas of Internet standardization in terms of three metrics (participation, patenting and leadership), and is rapidly gaining in terms of document authorship as well. Most of China׳s recent IETF involvement can be attributed to Huawei, though other Chinese firms have recently begun to increase their participation in the organization. Thus, contrary to some views that China׳s engagement with standardization is primarily one of indigenous innovation and “catching up”, China׳s experience with IETF demonstrates deliberate and effective engagement with a major Western standards-development organization on its own terms.     

Comparing FTTH access networks based on P2P and PMP fibre topologies

There is an ongoing discussion in the market which Next Generation Access (NGA) architecture best suits future needs and which investment and cost differences exist. The discussion can be subsumed as P2P vs. GPON, which is somewhat misleading as this article reveals. The discussion is driven by the fact that the high capital cost and the long asset life time of fibre mean that the technology choices made today will dominate the opportunities for telecommunication business of all market players, incumbents, competitors, content providers and business and residential users for many years in the future.The paper analyzes the cost and other differences between Fibre-to-the-Home (FTTH) access network architectures and their related different wholesale approaches by using the well-known and understood steady state approach applied in other NGA analyses in the past. In addition to the steady state analysis a dynamic cost evaluation is included taking into account the different investment behaviour of the FTTH architectures over time. The results describe investment and cost differences between architectures, incumbents and wholesale based competitive operators. The analysis has been performed for different geotypes (clusters) of decreasing population density in a representative European settlement structure.     

快速成形技术的应用及热点分析

基于快速成形技术的原理,展示了快速成形技术在快速模具制造、金属零件直接成形、反求工程等领域的广泛应用,总结了快速成形制造技术研究的热点,即研发新材料和新设备、提高成形精度、建立RPM的反求工程系统、建立成形技术的统一标准和扩大成形技术的应用领域。     

Whose Image is it Anyway?: Some Considerations of the Curricular Importance of Subject Image in Secondary School Design and Technology Education

This paper explores the idea that a sense of school subject image is a necessary feature of curriculum management and a potent force for change. The discussion centres on the view that all school subjects have an image and that if those intimately involved with the subject do not control the image then someone else does! In such circumstances the image is the product of past encounters and old euphemisms and is unlikely to hold the changed realities.The UK developments in Design and Technology education (the term Design and Technology is used to denote the school subject defined under this heading by the UK National Curriculum, 1995) have created something of an image problem which has interesting international parallels. Some of these problems are due to clearly discernible internal tensions and an ambiguous relationship with other subject areas.Through greater attention to subject image internal controversies might be acknowledged and resolved, relationships with other subject areas can be more meaningfully understood and practitioners can be helped to make sense of curriculum change.     

Indigenous peoples’ nutrition transition in a right to food perspective

In indigenous communities the nutrition transition characterized by a rapid westernization of diet and lifestyle is associated with rising prevalence of chronic disease. Field work and literature reviews from two different policy environments, Argentina (Jujuy) and Canada (Nunavut), identified factors that add to indigenous peoples’ disease risk. The analytical framework was the emerging human right to adequate food approach to policies and programmes. Indigenous peoples’ chronic disease risk tends to increase as a result of government policies that infringe on indigenous peoples’ livelihoods and territories, undermining their economic system, values and solidarity networks. Policies intended to increase food security, including food aid, may also fuel the nutrition transition. There is a need to explore further the connection between well-intended policies towards indigenous peoples and the development of chronic diseases, and to broaden the understanding of the role that different forms of discrimination play in the westernization of their lifestyles, values and food habits. Food policies that take due account of indigenous peoples’ human rights, including their right to enjoy their culture, may counteract the growth of chronic disease in these communities.     

HSE走进中国石油

企业管理水平的好坏直接影响着企业的经济效益,运用HSE管理能提高企业管理水平,HSE管理模式将健康,安全,环境三者视为一个有机的整体。HSE管理认为人的安全是第一位的,人是创造财富的原动力,是企业的最大财产,HSE管理体系强调的是“蝴蝶效应”。     

A strategic skill based model of supplier integration and its effect on supply management performance

Supplier integration is a tool to help organizations gain competitive advantage. Strategic supply management skills and the supply management function's perceived status are hypothesized as antecedents to supplier integration leading to supply management performance. The sample for this study includes 152 executive level supply management professionals. The empirical results suggest that strategic skills and perceived status are essential antecedents to supplier integration and subsequent performance. Further, the relationship between strategic skills and performance is mediated by supplier integration. Results of a dominance analysis also suggest which strategic skills are most likely to explain status integration, and performance. These findings have significant implications for supply management theory and practice.     

Material power and normative conflict in global and local agrifood governance: The lessons of ‘Golden Rice’ in India

This special section aims to investigate the interaction of global and local forces in shaping agrifood governance. It starts from the recognition that a multitude of actors and norms shape today’s agrifood system. The resulting opaqueness of the systems makes it extremely difficult to understand and explain processes and outcomes of agrifood governance. Given the sustainability challenges facing the agrifood system, improvements in our understanding of what the interaction of global and local actors and norms means on the ground are urgently needed, however. The section, therefore, analyses agrifood governance in India across a selected group of cases. It does so by employing a systematic framework emphasizing the material and ideational dimensions of power and their interaction. The section has chosen India as the setting in which to analyze this interaction due to the crucial role the food demand and supply of this rising power plays in today’s agrifood system. This article provides the special sections’ analytical framework, which uses the interplay of material and ideational dimensions of power as a focal lens. In addition, the article applies this framework to an empirical study of the political conflict around GMO foods in India, specifically the case of ‘Golden Rice’.     

Cost allocation of WCDMA and wholesale pricing for mVoIP and data services

This study estimates cost-based prices for wholesale voice and data services provided to 3G (WCDMA) MVNOs according to their distinct types. For estimation, 3G MVNOs are classified into different types, and the overall cost of WCDMA facilities are separated into voice and data components based on their subscriber rates, actual traffic rates, as well as efficiency consideration of traffic rates. The study then calculates cost-based wholesale prices of voice and data services for each of the 3G MVNO types. The result of this study shows that a cost-plus pricing scheme can help achieve the policy goals of the regulator, namely, lowering telecommunications tariffs and facilitating the introduction of new convergent-type services, far more effectively than the current retail-minus pricing scheme. The findings of this study may assist firms in developing business models based on 3G networks and telecom regulators in designing policies related to interconnection, mVoIP, prepaid calls, wholesale services, and network neutrality.     

Collectivism,individualism, and outgroup cooperation in a segmented China

A consistent theme in cross-cultural management research is that collectivists are more cooperative than individualists. We use Hofstede's measure for individualism–collectivism and combine it with an experimental measure of cooperation to test this relationship in China. In contrast to the established paradigm, we find that groups with higher individualistic scores are more cooperative than those groups with higher collectivistic scores. We attribute these results to groups being composed of outgroup members. In addition, we find that subjects from the more developed coastal area are more individualistic and cooperative than are subjects from inland China.