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基于CatBoost的玻璃成分与风化关系实证探究
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作者 张星园 孟怡辰 +1 位作者 罗建龙 李言 《玻璃》 2023年第8期15-23,共9页
高钾玻璃和铅钡玻璃的化学成分含量和物理属性不同,研究玻璃文物样品的类型对文物的保存和探索有着重要价值。为了精确分类玻璃文物样品类型,通过综合相关性分析研究两种玻璃的分类规律,发现玻璃类型和二氧化硅、氧化钾、氧化铅和氧化... 高钾玻璃和铅钡玻璃的化学成分含量和物理属性不同,研究玻璃文物样品的类型对文物的保存和探索有着重要价值。为了精确分类玻璃文物样品类型,通过综合相关性分析研究两种玻璃的分类规律,发现玻璃类型和二氧化硅、氧化钾、氧化铅和氧化钡的相关系数可达到0.7,得知高钾玻璃中氧化硅和氧化钾含量较高,铅钡玻璃中氧化钡和氧化铅含量较高。结合样品的分类规律,以玻璃文物样品的化学成分以及表面风化情况作为特征参数建立CatBoost分类模型,并得到准确率为97%,召回率为95.9%,F1值为92.4%的模型效果,同时利用关联性和差异性分析进行模型验证,为考古工作者快速区分玻璃文物样品类型提供理论指导依据。 展开更多
关键词 CatBoost算法 玻璃文物样品分类 综合相关性分析 差异性分析
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The Outcomes of the Co-branding Strategy
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作者 Magdalena Grebosz 《Chinese Business Review》 2012年第9期823-829,共7页
The objective of this study is to investigate the outcomes of co-branding strategy in the assessment of the brand managers of analysed companies on European market and verification if a co-branding gives the opportuni... The objective of this study is to investigate the outcomes of co-branding strategy in the assessment of the brand managers of analysed companies on European market and verification if a co-branding gives the opportunities for internal and external development. The analysis of correlation between the outcomes of co-branding and two major categories of co-branding strategy (ingredient branding and symbolic co-branding) are also important. In the paper the results of empirical studies are presented. Recent primary research (2009-2011) was conducted in 50 companies which are present in minimum three countries of Europe and have realized co-branding strategy for three years. Questionnaire surveys were carried out throughout all 120 identified companies. As a result, data from 50 companies were obtained, which amounted to 41.7% of all companies polled. The analysis of findings indicates the different outcomes in case of two major categories of co-branding strategy. The results show the general evaluation of the co-branded projects as well as the possibilities of the internal and external development. The results also emphasize the significance of symbolic character of the co-branding strategy. The recommendations in this study are set forth, of course, with the caveat as to the limitations of the sample. Nonetheless, it is believed that the results of this study will alert companies to the potential outcomes of co-branding taking into account the category of cooperation. This research has resulted in practical contribution. From the substantive stand point, this research has shed light on the outcomes of co-branding. This information can be useful for managers to understand which effects can be expected. From a theoretical and practical standpoint, this research contributes to brand alliances research and has provided a better understanding of outcomes of co-branding and the correlations between the possibilities of internal and external development and chosen category of co-branding strategy. This text may contribute to further research in this area and as a kind of motivator for further discussion on this topic. 展开更多
关键词 CO-BRANDING PARTNER BRAND cooperation ALLIANCE STRATEGY
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