排序方式: 共有72条查询结果,搜索用时 31 毫秒
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介绍了环氧乙烷法合成乙二醇的研究开发进展,重点介绍了环氧乙烷催化水合法和碳酸乙烯酯法制乙二醇的研究进展,提出了我国今后的发展建议. 相似文献
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《Journal of medical economics》2013,16(8):612-618
Abstract
Objective:
We reported recently that early use of inhaled nitric oxide therapy (iNO) for term and late preterm infants with hypoxic respiratory failure (HRF) at an oxygenation index (OI) of ≥15 and <20 is associated with earlier discharge from the hospital, relative to babies treated at OI ≥25. The objective of the present analysis is to determine whether earlier use of iNO in this cohort leads to lower cost of medical care. 相似文献33.
文章分析了氧化铁二次资源的物理、化学特性,指出利用这种资源开发铁氧体磁性材料是发展综合 利用的有效途径。同时对具体开发目标和有关问题进行了分析,探讨解决问题的方法。 相似文献
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以废弃的瓷砖为原料制备滤料,采用加热蒸发法对滤料进行表面改性,并对它们的密度、铁覆盖量、孔隙率、比表面积、氧化铁膜的附着能力、表面形貌、铁氧化物的物相组成以及滤料的表面电位等进行了测定和分析。考察了不同pH值下改性与未改性滤料对阴、阳离子的吸附效果。结果表明:改性滤料吸附阴离子的效果优于未改性滤料,而未改性滤料吸附阳离子的效果优于改性滤料。 相似文献
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Marginal abatement costs of greenhouse gas emissions from European agriculture, cost effectiveness, and the EU non-ETS burden sharing agreement 总被引:2,自引:0,他引:2
We propose a quantitative assessment of the marginal abatement costs (MAC) of greenhouse gas emissions from European agriculture and analyze the implications of the non-ETS burden-sharing agreement (BSA) for this sector. This assessment is based on MAC reduced forms, the generic specification of which enables simple parameterization and numerical computations. Such MAC curves are parameterized for each Member State using the outputs of a detailed model of the European agricultural supply. They are then used to compute total and marginal abatement costs involved by the BSA targets, as well as the cost-effective effort sharing, the corresponding emission price and abatement costs. The main findings are: (i) flexibility mechanisms such as a cap-and-trade system for agricultural emissions could reduce the total costs of meeting the 10% EU abatement target by a factor two to three relative to the strict implementation of each country's target, (ii) the corresponding equilibrium emission price is found to be 32-42 €/tCO2eq depending on the assumption regarding business-as-usual emissions, and (iii) a cap-and-trade system with allowances based on the BSA targets would involve substantial transfers from EU-15 countries to New Member States, an important share of which being made of ‘hot air’. 相似文献
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铟锡氧化物(ITO)靶材的用途广泛,研究制备铟锡氧化物靶材具有长远的战略意义。文章概述了铟锡氧化物靶材的用途和研制现状,并对铟锡氧化物靶材的应用前景进行展望。 相似文献
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采用粉末压片-X射线荧光光谱法,建立了氧化锌富集物中ZnO、Cl、As、Cd、Fe的同时测定方法,并建立了针对限量标准的快速筛查流程。结果表明,该方法适用于锌元素以氧化锌物相存在的氧化锌富集物中元素的检测,各元素检测线性范围如下:ZnO(23.66%73.04%)、Fe(0.073%10.25%)、Cl(3.24%25.24%)、As(0.02%0.095%)、Cd(0.038%1.36%);方法检出限依次为105.2 ppm、4.6 ppm、47.3 ppm、198.1 ppm、4.5 ppm,相对标准偏差小于0.27%。 相似文献