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加油站汽油营销区域协同方法及实证研究
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作者 张蕾 仇玄 +1 位作者 丁少恒 王艺霏 《国际石油经济》 2023年第8期82-89,共8页
以内蒙古地区的加油站日度价量数据为基础,利用线性回归、联立方程模型及数值模拟,研究汽油行业中存在竞争关系的加油站之间的油品价量关系,并以区域销售量为目标,对站点定价进行优化。研究发现,站点与存在竞争关系的对手站点间的油品... 以内蒙古地区的加油站日度价量数据为基础,利用线性回归、联立方程模型及数值模拟,研究汽油行业中存在竞争关系的加油站之间的油品价量关系,并以区域销售量为目标,对站点定价进行优化。研究发现,站点与存在竞争关系的对手站点间的油品价量互动较为频繁,各站点的促销行为将显著提高自身的汽油销量。经过模型优化后的油品销售价格能够使区域总销售额提升9%~17%,对提升区域站点竞争力具有重要意义。 展开更多
关键词 汽油 加油站 联立方程 数值模拟 量价竞争
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On the Status quo and Development Trends of Imported Grape Wine in China
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作者 Yingchen Wang 《International English Education Research》 2014年第4期89-91,共3页
At the present stage, The imported grape wine in China have hot market, imports increased year by year, high gross mar-gins, many brands, uneven quality, low market confidence, the price value of large deviations, imp... At the present stage, The imported grape wine in China have hot market, imports increased year by year, high gross mar-gins, many brands, uneven quality, low market confidence, the price value of large deviations, imperfect legislation, regulatory confusion and so on characters. The relevant departments and units should actively take a number of measures to improve the market of imported grape wine stably and healthy development. Believe in the future, its imports would continue to grow, the gross profit margin gradually would return to rational, the cost-effective products would be prevailing, the sales channels would be diversification, the enterprises in-volved would increase, and the industry competition would become increasingly fierce. 展开更多
关键词 Imported grape wine Gross profit margin Trust degree Continues to grow
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Representation of an Electrical Engineering Curriculum Using an Ontology of Controlled Quality
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作者 Carolina Sarmiento Oscar Duarte +2 位作者 Angelica Ghisays Maria Barrera Rene Soto 《Journal of Mechanics Engineering and Automation》 2014年第2期130-141,共12页
A curriculum is a complex system that includes a set of core competencies, objectives, contents, methodological and evaluation criteria, regulation among other things. In order to represent a curriculum as a piece of ... A curriculum is a complex system that includes a set of core competencies, objectives, contents, methodological and evaluation criteria, regulation among other things. In order to represent a curriculum as a piece of software the common tools used are databases, trees and lists of courses. However, none of these tools can capture the deep and complex relationships among the elements of a curriculum. To avoid this problem, a more complete representation of an engineering curriculum using ontologies has been developed. This paper presents the construction of an ontology for undergraduate electrical engineering curriculum domain at Universidad Nacional de Colombia, which aims to represent, organize, formalize and standardize the knowledge of this domain, so that it can be shared and reused by different groups of people in the field of education and engineering. The ontology includes four curriculum aspects: knowledge in electrical engineering, skills in engineering, electrical engineering curriculum and regulation. For the ontology development, Methontology was selected as methodology and Protege as implementation tool. In addition, there is a proposal of documentation for this methodology, based on principles of quality management systems. This ontology is designed in order to be used in any field of engineering. 展开更多
关键词 CURRICULUM Methontology ontological engineering PROTEGE quality management systems.
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