共查询到20条相似文献，搜索用时 500 毫秒
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本文通过建立数学模型分析了酿酒葡萄与葡萄酒的理化指标之间的联系,以及它们对葡萄酒质量的影响程度,论证了能否用葡萄和葡萄酒的理化指标来评价葡萄酒的质量. 相似文献
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针对我国葡萄酒业内缺乏利用理化指标对葡萄酒进行评级的现状,分析能否使用葡萄和葡萄酒的理化指标评价葡萄酒的质量．通过运用双因子方差分析、主成分分析、逐步回归分析等方法分析了葡萄酒的分级以及酿酒葡萄与葡萄酒的理化指标之间的联系等问题,建立了基于Matlab平台的BP神经网络模型,得到了在一定条件下,能用酿酒葡萄和葡萄酒的理化指标来评价葡萄酒的质量的结论．但仅考虑理化指标时会使结果存在一定的误差,故建议使用理化指标和简单的感官分析相结合来评价葡萄酒的质量,以提高评价葡萄酒质量的准确性． 相似文献
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针对葡萄酒质量的评价问题,运用科学综合评分法和t检验分析了两组品酒员评价结果的差异,判别出品酒员评价结果的可信度;运用主成分分析法求出红、白葡萄的六个综合评价值,在此基础上,利用模糊C均值聚类方法对酿酒葡萄进行了分级;运用典型相关分析方法,分析出酿酒葡萄与葡萄酒的理化指标之间的关系;运用多元线性回归的方法,分析出酿酒葡萄和葡萄酒理化指标对葡萄酒质量的影响. 相似文献
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葡萄与葡萄酒质量的综合评价 总被引：1，自引：0，他引：1
从体现酒品质量的感官评价和酿酒葡萄与葡萄酒的理化指标两方面入手,运用t检验、主成分分析法、模糊c均值聚类分析、多元线性回归分别建立显著性差异检验、主成分、聚类分析、质量影响和论证等模型,并运用SPSS、Matlab7软件,得出两组评酒员的评价结果差异性和可信度,酿酒葡萄的分级,酿酒葡萄与葡萄酒的理化指标之间的联系,最后分析并论证了葡萄、葡萄酒的理化指标与葡萄酒质量的关系. 相似文献
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给出了一种基于指标相关性和因子分析的特征选择方法,剔除与样本弱相关指标、减少冗余指标,从而简化了评价指标体系.基于酿酒葡萄和葡萄酒的理化指标体系分别建立多元线性回归模型,并在此基础上同时考虑两者对葡萄酒质量的影响,得到了综合评价模型,并将该方法应用于2012年高教杯全国大学生数学建模竞赛葡萄酒质量评价中,得到了葡萄酒质量与酿酒葡萄和葡萄酒理化指标的定量关系.结果表明:回归方程准确率为98.49%. 相似文献
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罗艳萍 《读与写:教育教学刊》2008,5(6)
The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity. 相似文献
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Richard Denner 《海外英语》2007,(4):14-15
Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose. 相似文献
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Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F. 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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陈美曦 《山东教育学院学报》2008,23(2):103-107
Different nations have different social cultures, and the social culture of every nation is developing with the development of the nation, language is greatly influenced by social culture, which enables language to possess national and historical characteristics. Word is the smallest, independent, meaningful linguistic unit of language. It can well reflect the national and historical characteristics. From synchronic aspect, the social and cultural influence on word meaning is mainly embodied in conceptual and associative meanings of word. The incorrespondence of word meaning is a phenomenon that exists in both conceptual and associative meanings of word among different languages. From diachronic aspect, the development of social culture causes some changes of word meaning to some extent. Therefore, social culture plays a key role in vocabulary learning and mastery of a language. 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献