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钠长石化花岗岩型铌钽矿石重选尾矿经磁选分离,得到的长石石英产品具有钾、钠含量高,含铁低,并舍少量锂的特点,其产品可作为陶瓷、玻璃行业的原料或添加料.试验表明,长石□石英产品在建筑陶瓷、日用陶瓷、玻璃和熔块等方面的应用,其用量范围为30~50wt%,使用效果良好. 相似文献
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马殿生 《环球市场信息导报》2011,(9):20-20
该文针对在稠油高轮次、多周期蒸汽吞吐过程中,由于储层水敏、近井地带存水等原因所产生的注汽压力高、甚至注不进汽的现象,介绍了注汽前进行压裂改造辅助注汽的作用机理、配套工艺和矿场试验实例,说明压裂在一定程度上能够降低注汽压力、提高蒸汽吞吐效果,是一项值得进一步深入研究和探索的辅助热采工艺措施。 相似文献
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致密砂岩储层与常规砂岩储层相比具有岩性致密、低孔低渗、气藏压力系数低、圈闭幅度低、自然产能低等典型特征。按照我国标准,致密砂岩储层有效渗透率孔隙度r≤10%,且具有较高毛细管压力,束缚水饱和度和孔隙度之间存在负相关关系。该文将从致密砂岩储层特征、储层成因类型、储层物性影响因素三个方面对致密砂岩储层做一个简要论述。 相似文献
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羽绒制品的内在质量,主要取决于填充羽绒含绒量的高低.但由于填充料在制品中间,无法看到,只能凭手摸,但也只有有经验的专业人员才能"一摸了然".所以容易被投机商钻空子,混水摸鱼,甚至做出欺骗消费者的行为.在日常出口检验中,经常碰到标签所注含绒量比实际所充含绒量高,甚至发生贸易双方对制品实际充绒含量产生怀疑,发生争议,对簿公堂等事件.羽绒制品的特殊性,决定了对羽绒制品填充料的检查和监督,要格外仔细. 相似文献
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为了在过渡带四条带外扩边缘区域探索挖潜潜力,通过储层沉积特征及剩余油分布规律研究,优选水平井区,尝试利用水平井挖潜四条带潜力。运用地质建模、数值模拟等多学科手段,论证水平井的可行性,优化水平井井位。随钻跟踪过程中,采用LWD随钻测井现场对比、综合录井分析、岩屑录井观察和地质模型验证等多种手段,综合分析,成功的避开非目的层干扰,成功着陆,达到了较高的砂岩钻遇率。投产后产量超过周围直井的4倍,超过了预期的指标。该井的成功完钻,为过渡带剩余油挖潜提供了新的途径。 相似文献
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以醋酸酯类为酰化剂,由r-丁内酯(GBL)和乙酸乙酯催化合成a-乙酰-r-丁内酯(ABL)。探讨了各因素对ABL收率的影响,从而选择到过程的最优工艺参数,并获得ABL摩尔收率为84.52%,其质量含量达89.93%的较为满意的结果。 相似文献
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介绍了大庆油田天然气分公司北I-1深冷装置分子筛现状,通过延长分子筛塔的吸附时间、测量吸附液量和原料气露点、化验吸附的重烃种类和再生气组分的数据,定性、定量地分析了4A和13X两种型号分子筛的吸水、吸烃、吸附CO2、H2S的能力及其随时间变化规律,并针对北I-1深冷分子筛存在问题提出了优化及改造方案,为中国油气初加工深冷装置分子筛系统评价及分子筛选型提供一定的参考。 相似文献
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Deleveraging from high debt can provoke deep recession with significant international side effects. Swings in the nominal exchange rate and large variations in consumption, output, and terms of trade can happen during the adjustment. All these movements are inefficient and interesting trade-offs emerge from the perspective of global welfare. The optimal adjustment to global imbalances should not necessarily require large movements in the nominal exchange rate. A global liquidity trap can be desirable when countries are more open to trade. 相似文献
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We evaluate the impact of fiscal stimulus measures during the financial crisis and the subsequent turn to fiscal consolidation during the Euro Area crisis. Based on an exploitation of the information contained in systematic forecast errors, we identify a robust and substantial underestimation of the multiplier effects linked to these measures. Moreover the effects are highly persistent, pointing to hysteresis effects of fiscal measures during deep crises. 相似文献
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实习是高校教学内容的一个重要环节,一方面可以让学生得到锻炼,另一方面为学生的就业做铺垫.但是实习学生和企业并不构成法律上的劳动关系,所以在实习过程中出现的一些学生利益被侵害的行为没办法很好的维权,这值得深思.通过对实习的现状进行分析,找出存在的问题并提出了解决建议. 相似文献
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Nauro F. Campos 《Intereconomics》2016,51(6):348-352
This note argues that one should lay the focus of future European growth policy on integration and technology. This focus should be on maximising the growth effects of their interaction, with an emphasis on the importance of deep integration. The note provides three examples that show how deep integration has contributed to stop the relative economic decline in the UK vis-à-vis the EU founding members; how deep integration increased productivity in Sweden, Austria, and Finland compared to that in Norway; and how a key mechanism to advancements in the new EU member states has been the capacity of deep integration to generate institutional change. 相似文献
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第四次工业革命是数字化、网络化和智能化的深度融合。在此背景下,科技与经济间的深度融合成为创新力的重要决定因素。对于不同的经济体,筛选不同分位数水平以及复合分位数水平下影响创新力的关键因素,并分析这些因素的影响程度,对于发现创新力发展优势和短板,具有一定意义。本文以分位数回归和复合分位数回归为基础模型,构建科技经济融合创新力模型,以从科技经济视角,研究不同分位数水平以及复合分位数水平下创新力的重要影响因素,以期为政府及相关部门提供决策参考。研究表明,经济状况方面的因素对创新力影响最大;科学基础中的知识转移是影响创新力的重要因素。 相似文献
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Karsten Staehr 《Intereconomics》2013,48(5):293-302
The Baltic states were arguably the countries most severely affected by the global financial crisis. This article discusses the boom preceding the crisis, the ensuing austerity policies and the economic effects of these policies. All three countries maintained fixed exchange rates, but the degree of fiscal austerity varied across the countries, with Estonia undertaking the strongest fiscal consolidation in 2009. The downturn was so swift and deep that expansionary policies were unlikely to affect short-term outcomes. Growth returned towards the end of 2009, largely driven by exports. The export performance cannot be directly linked to the austerity policies. The main lesson from the Baltics is that increased macroeconomic stability must be attained by avoiding overheating and unsustainable financial exposure. The challenge for the future is to ensure that austerity policies are implemented during economic booms. 相似文献
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Are deep recessions typically followed by strong recoveries? This paper investigates this question. There is not a single standard definition for a deep recession or a strong recovery. Therefore, our first step is to define what constitutes a deep recession and a strong recovery. Next we examine whether there is any causal relationship between deep recessions and strong recoveries. Our analysis shows there is no relationship between the depth of a recession and the subsequent pace of economic recovery when we use Gross Domestic Product, Gross Domestic Income, and employment as measures of recession and recovery. A modestly significant relationship does exist, however, between the magnitude of increases in the unemployment rate during a recession and decreases in the unemployment rate during the ensuing recovery. 相似文献