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DRIS理论缺陷与方法重建 被引量:11
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作者 李健 李美桂 《中国农业科学》 CAS CSCD 北大核心 2004年第7期1000-1007,共8页
经分析DRIS存在两类理论缺陷:两正态分布的营养元素的比值分布为正偏的非常态;DRIS在营养元素等比不等量变化时存在诊断盲区。依据多维正态分布的二次型理论,以及等概率平衡观点,建立优于DRIS,以及与临界值诊断形式统一的“平衡态诊断... 经分析DRIS存在两类理论缺陷:两正态分布的营养元素的比值分布为正偏的非常态;DRIS在营养元素等比不等量变化时存在诊断盲区。依据多维正态分布的二次型理论,以及等概率平衡观点,建立优于DRIS,以及与临界值诊断形式统一的“平衡态诊断施肥综合法”BDRIS。当营养元素相关矩阵R=I(单位矩阵),即不考虑元素颉颃作用时,BDRIS简化为临界值诊断。同时,还提供了SAS语言编写的诊断程序。 展开更多
关键词 施肥综合法 DRIS 理论缺陷 等概率平衡态 bdris 临界值诊断 平衡诊断
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The Theoretical Defects in DRIS and the Restructuring of a New Approach 被引量:1
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作者 LIJian LIMei-gui 《Agricultural Sciences in China》 CAS CSCD 2004年第7期509-518,共10页
There are two kinds of theoretical defects export in the diagnosis and recommendationintegrated system (DRIS): the distribution of nutrient elements ratios with two normaldistribution displays an abnormal distribution... There are two kinds of theoretical defects export in the diagnosis and recommendationintegrated system (DRIS): the distribution of nutrient elements ratios with two normaldistribution displays an abnormal distribution of positive skewness; there is a blinddiagnostic area by DRIS on the occasion of the nutrient elements with equal ratios butwithout equal quantity. In the light of the quadratic form theory of multidimensionalnormal distribution and the view of balance of equal probability, the balance diagnosisand recommendation integrated system (BDRIS) was developed in this paper, which issuperior to DRIS and its diagnosis method is unified to critical value diagnosis. Whenthe correlation matrix of nutrient elements R=I(identity matrix), i.e., the effects ofelements antagonism is disregarded, BDRIS will be simplified into the critical valuediagnosis. In addition, the diagnosis program written in SAS language was also providedin this paper. 展开更多
关键词 Diagnosis and recommendation integrated system (DRIS) Balance diagnosis and recommendation integrated system (bdris) Ponkan Balance of equal probability
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