下喷射自吸吸收在氯化生产废气处理工艺中的应用

介绍了喷射自吸吸收在氯化生产废气处理中的应用。采用喷射泵代替引风机 ,与降膜吸收器串联 ,克服了淹塔、负压低的弊端 ,提高了氯化氢吸收率 ;回收次品盐酸浓度达 31%。     

柱壳液力成形弹性稳定性分析

利用非线性弹性稳定性理论 ,分析研究了壳体液力成形工艺中的开口圆柱壳弹性稳定性问题。计算结果表明不仅非线性弹性临界载荷远低于线性弹性临界载荷 ,而且更重要的是内压很大程度上有助于提高柱壳轴向弹性临界屈曲载荷 ,这样为内高压成形工艺提供了弹性失稳理论依据     

双斜面刃口切舌弯曲模的设计

通过理论分析 ,介绍了双斜面刃口切舌弯曲模的设计方法及单面切舌零件的卸料及防止垂直切口撕裂的方法     

标准类别指数法在地表水环境质量评价中的应用

在确定水体主要污染物的基础上，以相应水体主要污染物项目为评价项目，以地表水环境质量标准的类别分级为依据，应用模糊数学理论对地表水环境质量或污染程度予以分级。能客观、直观地反映相应地表水体环境质量或污染程度，计算过程简便，是一种可采纳的实用水质评价方法。     

生物法处理含铬废水的研究进展

随着人类对环境保护的重视和环境法规的日益严格，国内外研究人员纷纷将注意力转向生物法处理含铬废水。文章介绍了惰性生物吸附法和纯种微生物法处理含铬废水近年来的研究进展。     

生物测试法应用于判别除草剂环境污染

在实验室条件下进行了阿特拉津、乙草胺、甲磺隆3种除草剂对玉米根长抑制试验.结果表明,受试玉米对3种除草剂的敏感顺序为甲磺隆＞乙草胺＞阿特拉津.将此结果应用于农药环境污染事故的调查与诊断工作中,对污染因子进行了初步的分析和判定.     

广西来宾栖霞组缺氧沉积环境地球化学特征

地层的岩石地球化学特征是判断其形成环境氧化还原条件的重要手段之一。本文对广西来宾铁桥剖面栖霞组中层纹状灰岩和含泥质灰岩进行地球化学分析 ,结合栖霞组沉积学和古生态学特征 ,对栖霞组沉积环境进行了探讨。岩石微量元素含量、黄铁矿矿化程度 (DOP值 )、痕量元素V/Cr、Ni/Co、U/Th、V/(V +Ni)等比值的研究结果显示 ,研究区具有缺氧沉积成因的地球化学特征。     

生物降解性塑料可生物降解性能测试方法探讨

对生物降解性塑料薄膜的可降解性能提出了采用特种微生物霉菌的生物培养试验检测方法。根据试样中霉菌作用的不同覆盖面积的百分比,提出了可降解性能的分级指标。通过对某塑料薄膜厂的生产产品进行检测试验的结果而优化的工艺生产条件所生产的试样,作性能测试,表明这种产品的可降解性能的分级指标可以达到4级水平,对产品的生产起到指导性作用。     

On the Nexus of SO<Subscript>2</Subscript> and CO<Subscript>2</Subscript> emissions in China: the ancillary benefits of CO<Subscript>2</Subscript> emission reductions

This paper examines the issue of ancillary benefits by linking sulfur dioxide (SO₂) emission to CO₂ emission using a panel of 29 Chinese provinces over the period 1995–2007. In the presence of non-stationarity and cointegrating properties of these two data series, this paper applies the panel cointegration techniques to examine both the long-run and short-run elasticities of SO₂ with respect to CO₂. The major findings are that: (1) there exhibits a stable long-run equilibrium relationship between the SO₂ and CO₂ emission with the long-run elasticity being 2.15; (2) there exists a short-run relationship between these two emissions with the short-run elasticity being 0.04. In addition, following an exogenous shock that causes a deviation from the long-run equilibrium, it would take approximately 15 years for SO₂ emission to revert toward the long-run equilibrium path with an average annual convergence rate of 6.5%; (3) the derived ancillary benefits that is generated from one metric ton of CO₂ emission reduction, are 11.77 Yuan (approximately US1.7) in the short run and 196.16 Yuan (US 1.7) in the short run and 196.16 Yuan (US 30) in the long run. These findings are not only crucial from the econometric modeling perspective, but also have important policy implications.     

Analysis on Temporal and Spatial Changes and Driving Forces of Poverty-Stricken Areas in Hebei Province

1 INTRODUCTIONPoverty is a social phenomenon accompanying the processof human development (Shen Hong, 2000),it is also oneof the Three Ps problems (poverty, pollution andpopulation),alleviating and eliminating poverty has beenone of the major concerns in many countries. Since Chinesegovernment has implemented the anti-poverty programin a planned way in 1986, the number of impoverishedpopulation has decreased year by year, especially after theimplementation of National Seven-Year Anti-p…