气体超声流量计与孔板流量计在天然气工业中应用的比较

文章对气体超声流量计与孔板流量计在天然气工业中应用的两个主要方面:流体流动特性对仪表性能的影响和流量计的干校问题进行比较,分析它们存在的问题及发展前景.还对其它仪表性能进行了比较.     

食品包装材料中邻苯二甲酸酯增塑剂残留的检测

针对食品包装材料中邻苯二甲酸酯（PAEs）增塑剂残留,采用加速溶剂萃取（ASE）和GC／MS联用技术分析5种PAEs（DMP,DEP,DBP,BBP,DEHP）,结果表明加速溶剂萃取用于食品包装材料中PAEs的提取,最佳温度条件为120℃,最佳循环次数为3次。方法检出限达到0．1mg／kg．回收率达到95．5％-99．8％;并且具有很好的重现性和精密度。     

气相色谱法检测植物油中脂肪酸组成成分

本文研究了气相色谱法检测植物油中脂肪酸的组成和含量,采用先皂化和甲酯化的实验过程,再用CP-sil88型毛细管色谱柱进行分析,能较好的分离37种脂肪酸,对数据进行处理可以看出,该方法分离度好,适用于植物油中脂肪酸组成及含量的测定.     

Strategic Responses to Regulatory Policies: What Lessons Can Be Learned from the U.K. Contract Gas Market?

The gas industry was first privatisedin 1986, and the regulator, Ofgas, identified thecontract gas market as a possibility for introducinginitial competition into the industry. Nevertheless,competing shippers were slow in entering the market.Subsequently, Ofgas introduced a series ofpro-competitive policies. It, however, invoked aseries of strategic behaviour by the incumbentshipper, British Gas. The effectiveness of thesemeasures are analysed here with respect to theevolving competitive process. The issues it raised,especially when formulating future regulatory policiesand theories, are also considered.     

Assessment and budget allocation of Iranian natural gas distribution company- A CSW DEA based model

Regarding the importance of budgeting in organizations, this research proposes an empirical approach to budget allocation problems. The methodological instrument utilized is data envelopment analysis (DEA) which is a nonparametric mathematical programming technique. In the DEA methodology a standard DEA model should be independently solved to evaluate each decision making unit (DMU). Consequently, it is hard to find the magnitude of budget for each DMU by applying a budget allocation model based on standard DEA models because identifying the DMU under evaluation is problematic. Also, to overcome problems of evaluation using standard DEA models, common set of weights (CSW) DEA models were suggested. These models can be developed for use in budget allocation DEA models that lead to finding a single magnitude of budget for each DMU. Moreover, the opinion of the decision maker can be incorporated into the model using budgetary constraints. As a result, a restricted linear budget allocation CSW DEA model is proposed in which the central authority would like to plan for improving the total efficiency scores of all DMUs. In essence, the proposed model is used to reallocate the available budget and, thus, the results obtained will be a suggestion for budget allocation in subsequent periods. Finally, the proposed model is applied to budget allocation in the Iranian gas industry in which the available budget is reallocated to increase the total efficiency scores of Iranian gas distribution branches.     

关于气举井检阀周期统计方法的讨论

分析了气举井检阀周期统计中存在的问题,讨论了影响气举并检阀周期统计的主要因素,推荐了气举井检阀周期的统计方法,对油田现场气举井检阀周期的统计及量化气举井的技术管理水平具有一定指导意义.     

加油站储油罐火灾、爆炸危险性定量分析

采用地下储罐爆炸和池火灾计算方法对加油站储罐爆炸和池火灾进行了定量分析,确定了事故状态下的危害半径。     

我国"西气东输"产业化的政策分析

本文根据我国天然气工业发展的实际情况，分析了当前我国天然气工业发展所面临的问题，并通过借鉴研究国外天然气产业在项目投资、税收、价格政策以及管理等方面的成功经验，对我国西部大开发的标志性工程项目“西气东输”工程建设和营运的相关经济政策进行了探讨，提出了促进我国天然气工业发展和“西气东输”产业化的一些具体政策措施。     

以GC-MS法测定复合食品包装袋中2,4-二氨基甲苯残留量

复合食品包装袋用胶黏剂常以甲苯二异氰酸酯作为固化剂,它易水解成具有致癌性的2,4-二氨基甲苯并迁移到食品中,对食用者造成危害。本文用沸水浸取复合食品包装袋样品中的2,4-二氨基甲苯,再用二氯甲烷进行液液萃取,经七氟丁酸酐酰化后将衍生物进行GC-MS分析,并采用在空白样品中添加不同浓度的2,4-二氨基甲苯作为标准溶液,绘制标准工作曲线（线性方程）。通过此线性方程,由GC-MS方法测定的特征碎片离子峰面积得到2,4-二氨基甲苯浓度。该方法对复合食品包装袋中的2,4-二氨基甲苯的检出限为0.2μg/L,检测浓度范围为1～100μg/L,样品加标回收率为90%～110%,完全满足检测复合食品包装袋中2,4-二氨基甲苯的需要。     

碳排放权交易机制下提升企业温室气体排放监测报告能力研究

温室气体排放监测、报告与核证（MRV）制度不仅是获取真实准确温室气体排放数据的重要途径,更是进行温室气体减排政策创新、构建基于市场机制的碳排放权交易体系的核心内容。企业作为市场参与的主体,需要不断提升其在温室气体排放监测报告上的能力,以适应市场发展和政策要求。本文在对监测报告制度的理论基础、内涵要求及运行机理进行全面阐述的基础上,分析了我国企业温室气体排放监测报告能力和管理水平建设的现状及面临的主要问题,并提出若干对策建议。