基于SPSS分析煤灰白度特征和灰成分关系的研究

为了探索国能集团煤灰白度特征和灰成分的关系,借助SPSS统计分析软件进行了相关性分析,以灰白度为因变量,煤灰各成分为自变量建立多元线性回归模型。结果表明,煤灰白度与灰成分中的K_(2)O、Fe_(2)O_(3)、MnO_(2)、Al_(2)O_(3)具有很强的相关性,而与P_(2)O _(5)没有相关关系;建立了含Al_(2)O_(3)、Fe_(2)O_(3)、K_(2)O三个自变量的模型,可以解释白度的94.6%变化原因,模型具有一定的统计学意义,为煤灰白度特征和灰成分关系的探究提供参考。

采用综合措施提高重灰白度

详细阐述本公司生产系统中铁含量波动大的原因，及所采取的措施。提出往中和水里直接加入适量Ｎａ２Ｓ溶液的方法，以降低和稳定纯碱中的铁含量，提高重灰白度。

改进水合工艺 提高重灰白度

在固相水合法生产重质纯碱工艺中 ,在水合水内加入一定量的添加剂 ,可抑制一水碱中Fe份对重灰白度的影响 ,从而达到提高重灰白度的目的。

X{⊙}XY上的R（¤）关系

本文提出了灰白关系R（¤）的概念;给出了R（¤）关系的灰白度淹没定理,灰白度白化定理;得到了R（¤）关系的若干基本结果。

Chemical Composition of Meat in Castrated Male Brahman Cattle in Venezuela

Chemical composition of Brahman cattle was studied and determined in this study. Fifty males had been castrated at birth, farmed semi-intensively on the Venezuelan plain and then slaughtered at the age of 31 months with an approximate weight of 500 kilograms. The average pH value of beef was 5,84 after obtained for 24 hours after staughtering, which matches the ~atue found in similar studies made on the same breed in Venezuela （5.8）. The moisture, crude protein and ash contents correspond to the expected values of cattle, while the intramuscular fat values are slightly higher than those of the different breeds ofBos indicus. The total collagen values found in this study are either similar or lower than those found by other researches from the different breeds ofBos indicus and their crossbreeds, while the collagen solubility value （39%） was higher than the one found in other studies on the Brahman breed.