高瓦斯无双巷前进式采煤探讨

高瓦斯前进式采煤有效地解决了高瓦斯工作面上转角瓦斯易积聚问题,降低了矿井掘进率,缓解了衰老矿井采煤工作面的接续紧张的状况,可实现煤岩分运,减少煤炭损失。     

民用燃气智能抄表系统可行性研究

随着社会生活的进步,信息化、智能化建筑的大量涌现,沿用多年的人工抄表已趋于淘汰。文章在阐述燃气表使用特性基础上从技术的先进性、工程的可靠性和造价的合理性探讨建立远程智能抄表系统的可行性。同时,针对不同住宅类型提出了智能抄表方案的构建框架。     

技术监督在水力压裂过程中的应用分析

从压裂方案的设计与施工过程入手,针对各道工序的技术要点及控制关键,全面分析技术监督的重要意义和对施工质量的影响,以求提高作业质量,增加油水井措施效果。     

Strange bedfellows or an aligning of values? Exploration of stakeholder values in an alliance of concerned citizens against coal seam gas mining

In the inter-stakeholder relations in environmental and natural resource management disputes, farmers and environmentalists have traditionally fallen along opposing lines arguably due to seemingly incompatible values and fundamental differences between the groups. However, the expansion of the coal seam gas (CSG) industry has resulted in outrage and opposition from farming groups, environmentalists, and communities, leading to an alliance of these “strange bedfellows”. This study explored the opposition movement to CSG in Australia with the use of techniques from social psychology to investigate whether shared values provided the common ground for the alliance. An online survey of values was conducted (N = 197) with members of the CSG opposition alliance. No evidence was found to support the hypothesis that this alliance of stakeholders is comprised of two distinct sub-groups; farmers and environmentalists. The personal values of the respondents were highly inter-compatible, and aligned with social altruism. Sub-clusters were identified which corresponded with the extent to which respondents considered the CSG industry to impact on their lives. This research challenges the appropriateness of predetermined stakeholder classifications being applied to environmental and natural resource management issues, and highlights values as a relevant social factor in the cooperation potential of oft-conflicting stakeholder groups.     

Methodology to calculate the carbon footprint of household land use in the urban planning stage

The growing concerns of climate change require implementing measures to quantify, to monitor and to minimize greenhouse gas (GHG) emissions. Nonetheless, most of the measures available are not easy to define or execute because they rely on current emissions and have a corrective character. To address this issue, a methodology to characterize GHG emissions that allows implementing preventive measures is proposed in this paper. The methodology is related to household urban planning procedures and considers urban infrastructures to characterize GHG emissions and to execute preventive measures based on sustainability design criteria. The methodology has been tested by applying it to a set of medium-sized municipalities with average GHG emissions from 6,822.32 kgCO_2eq/year to 5,913.79 kgCO_2eq/year for every residential unit. The results indicate that the greatest pollutant source is transport, especially in the issuance of street network design, followed by gas and electricity consumption. The average undevelopable land area required for the complete GHG emissions capture amounts to 3.42 m² of undevelopable land for every m² of urbanizable land and 9.02 m² of undevelopable land for every m² of built land.     

改进原料气取样方法 提高丙烯含量分析结果平行性

分析了目前原料气罐车三次取样丙烯含量极差较大的问题,阐述了如何改进原料气取样方法,提高丙烯含量分析结果平行性。     

汽车时钟弹簧的应用

文章阐述了汽车时钟弹簧的定义及其在汽车中的应用,并着重介绍了时钟弹簧在汽车应用中的一些失效模式及装配过程中的各项注意事项,提出制造过程的质量控制要求与方法。     

The environmental benefits of changing logistics structures for fresh vegetables

The transport phase is one of the crucial stages that can be improved to reduce the environmental impact of the fresh fruit and vegetable supply chain. In this paper, we calculate the environmental impact of feasible logistic alternatives for the above-mentioned supply chain so as to identify the type of transportation that incurs the lowest environmental costs. Specifically, we consider the early potato supply chain as a case study, as it involves one of the main fresh vegetables exported from Italy. Consumers' willingness to pay for the environmental impact of different logistic chains was obtained through life cycle assessment. Our results show that rail transport could reduce environmental impact in terms of tons of oil equivalent, environmental loads, and fuel consumption while ensuring reasonable shipment times. Development of an efficient rail transport system would be positively considered by consumers, enhancing their preferences for Italian products.     

美国天然气消费与经济增长之间的关系研究对中国的启示

本文分析了从1949～2010年以来美国实际GDP和美国天然气消费之间的关系,主要运用到了计量经济学中的协整理论和Granger因果关系检验理论。从分析的结果得出,美国天然气消费量和美国经济增长之间是有协整关系的。美国天然气消费量的增长是美国实际GDP增长的原因。美国近年来对天然气的发展做了很大推动,特别是在页岩气方面的技术取得了长足的发展,有效地改善了能源结构。中国也应吸取美国的好经验,大力发展天然气,来应对煤炭的日益减少。     

低碳策略在油气处理领域的应用研究

在石油和天然气领域实施低碳策略,对提高能源利用率,降低碳排放具有重要的现实意义。文章概括了我国石油和天然气领域的碳排放现状,结合油气处理终端现状,初步探讨了燃气轮机尾气余热利用的思路和方案,阐述了根据油气生产流程的需求和特点进行预热能量转化的路线,在减少高温排放和碳排放的同时,实现了减少天然气消耗、提高天然气利用率、增加燃气轮机发电功率等目的。结果表明,该研究为全面推动低碳策略在油气生产单位的实际应用奠定了基础。