研究猪血液生化指标和增重关系应用灰色关联度分析值得考虑的问题——与张力、柳树青二先生商洽  

Some problems concerning the study of the relation between the bodyweigt gain of swine and the biochemical constituents of blood by means of the relation indices of the grey system analysis

作　　者：杨诗兴[1] 

机构地区：[1]中国农业科学院兰州畜牧与兽药研究所,甘肃兰州市小西湖730050

出　　处：《家畜生态》2000年第2期1-9,共9页Ecology of Domestic Animal

摘　　要：阅读《灰色关联度分析在研究猪血液生化指标和增重关系中的应用》一文时 ,遇到过去学习灰色系统关联度分析时相同的困惑问题 :( 1 )计算关联系数方程中代入的在 K时刻 ,或 K点 ,参考数列减比较数列而得出的差值 ,只代入差值 ,而不代入差值的正负符号问题。( 2 )计算关联系数方程中的分辨系数 ,经研究分析后认为似可删去而不损害该方程分辨关联度大小的灵敏度与精确度的问题。( 3)只凭关联度 (即关联系数的平均数 )的表面值大小 ,评估某几项因素 (如猪血液生化指标 )对猪增重的重要性的次序。这种方法与数理统计学中对两个或两个以上平均数彼此的差值须计算 t值查出其显著与否的办法不同。孰优孰劣 ?这是属于百家争呜的范畴 。In this study, several problems have been revealed concerning the use of the relation indices of the grey system analysis as follows: (1)In using the equation recommended for calculating the relation coefficients, the symbols of plus and minus of the differences between the reference series and the comparative series at K time or K points have been ignored. (2)Relation indices being the averages of the relation coefficients calculated by means of the recommended equation using the differences mentioned above, with symbols of plus and minus or with the symbols ignored are different from each other. (3)In the recommended equation for calculating the relation coefficient, the coefficient of differentiation, one of the main components of the equation, has been revealed to be not absolutely needed, and it may be eliminated from the equation with the grading number of the relation indices unaltered. (4)The different relation indices, being the averages of the relaticn coefficients, have been simply adopted in the grey system analysis as a standard for grading and consequently the numeral orders of importance of the different influential factcrs (the biochemical constituents of swine blood) to the bodyweight gain of swine are thus determined. This is different from the method of statical analysis, which advocates that the significance of the difference between different relation indices should be tested with the “t” Nalues calculated from the experimental data. Consequently, the grading number of the different relation indices established by the grey system analysis can not be verified by statistical analysis.

关 键 词：灰色关联度分析 猪血液生化指标 增重 关系 

分 类 号：S828.1[农业科学—畜牧学] N94[农业科学—畜牧兽医]