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镁及镁合金的资源、应用及其发展现状 被引量:60
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作者 张丁非 彭建 +1 位作者 丁培道 潘复生 《材料导报》 EI CAS CSCD 2004年第4期72-76,共5页
根据近年来国内外发表和公布的有关镁及镁合金的文章和信息,介绍了世界镁资源的分布及开采,回顾了上个世纪特别是近20年来世界镁合金及产品的发展,使用和市场概况。还着重介绍了我国镁及镁合金产业的发展现状并提出了战略性的建议。
关键词 镁镁合金 合金资源 合金应用 资源分布 生产量 市场价格
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Laboratory Obtaining of Ferroalloy after Reduction of Oxides from Waste Product and Natural Resource
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作者 Petar Petrov Maksim Marinov Rositsa Paunova 《Journal of Environmental Science and Engineering(B)》 2013年第1期15-19,共5页
The Obrochishte deposit located in the Republic of Bulgaria has considerable reserves of relatively poor carbonate manganese ore. At the same time, in the country there are operative outputs for the production of sulp... The Obrochishte deposit located in the Republic of Bulgaria has considerable reserves of relatively poor carbonate manganese ore. At the same time, in the country there are operative outputs for the production of sulphuric acid where vanadium catalyst is deactivated and discharged, polluting the environment. The utilization of these materials requires their consolidation to proper sizes with regard to the next processing, as the most suitable method for joint consolidation is agglomeration. The present work explores the preliminary calculations for obtaining agglomerate and obtaining an alloy with high and low carbon content, through carbothermic and aluminothermic agglomerate reduction. 展开更多
关键词 Manganese ore vanadium catalyst AGGLOMERATION complex alloy.
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Factor Affecting Technical Change of Credit Union Co-operative in Upper Northern of Thailand
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作者 Aussawin Phaoumnuaywit Thanes Sriwichailamphan Nisit Panthamit 《Journalism and Mass Communication》 2016年第6期350-358,共9页
Credit union co-operatives are organized for supporting poor people who are difficult to find funding sources for improvement their economic security. Majority of the credit unions co-operatives are made up of members... Credit union co-operatives are organized for supporting poor people who are difficult to find funding sources for improvement their economic security. Majority of the credit unions co-operatives are made up of members who are currently working in the agricultural sectors. However some of credit union co-operatives have members who are working in non-agriculture sectors, they use credit union co-operatives to improve quality as farmer. The main objective in this paper is comparison of technical operation efficiency of the credit unions agriculture and non-agriculture sector with sample size of 170 groups from eight provinces in the upper northern region of Thailand, using the Malmquist Productivity Index Approach. 展开更多
关键词 efficiency MALMQUIST credit union agriculture sector non-agriculture sector
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Measurement of Economic Power: An Engineering Approach
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作者 Mohammed Safiuddin 《Journal of Modern Accounting and Auditing》 2017年第4期162-173,共12页
Business Directory defines economic power as "conditions of having sufficient productive resources at command that give the capacity to make and enforce economic decisions, such as allocation of resources and apporti... Business Directory defines economic power as "conditions of having sufficient productive resources at command that give the capacity to make and enforce economic decisions, such as allocation of resources and apportioning of goods and services". This qualitative definition may be sufficient for general discussions, but it does not offer any quantitative measurements for management and control. Is there a way to measure economic power for analysis and synthesis of economic systems in this 21st century? This paper answers this question by introducing a set of quantitative terms from the field of electrical engineering, used in power measurement and control of electrical systems. Circuit theory concepts are introduced to show how the relationship between cash and cash flow in finance is analogous to that of electric charge and electric current and how education level, as economic potential, is analogous to electrical potential that causes current to flow in a circuit. An individual is identified as the basic cash flow source in the economy. Circuit models for an individual as well as a typical production facility are developed and demonstrated with an example. Equations for the measurement of economic power, losses, efficiency, and power factor are presented. It is shown that the individuals are the basic cash flow sources and producers of economic power. 展开更多
关键词 economic power economic potential economic efficiency
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