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切塔耶夫型非完整系统的广义梯度表示
非完整系统 广义梯度系统 稳定性
2018/12/29
非定常非完整力学系统的稳定性研究是重要而又困难的问题,直接从微分方程出发来构造李雅普诺夫函数往往很难实现.本文给出了一种间接方法.提出了10类广义梯度系统的定义,并分别给出了10类广义梯度系统的微分方程.进一步研究一般切塔耶夫型非完整系统的广义梯度表示,给出该系统分别成为这10类广义梯度系统的条件,从而将切塔耶夫型非完整系统化成各类广义梯度系统.最后利用广义梯度系统的性质来研究切塔耶夫型非完整系统...
The Body Mass Index (BMI) and TV Viewing in a Co-Integration Framework
BMI Integration Co-Integration Error Correction Model
2013/9/5
Many techniques are met in the literature, trying to investigate the effect of TV watching hours on BMI. However, we haven’t traced any empirical study with co-integration analysis, as it is applied h...
Inferring Causal Complexity
Causality causal reasoning regularity theory QCA Qualitative Comparative Analysis social science
2011/9/6
In "The Comparative Method" Ragin (1987) has outlined a procedure of Boolean causal reasoning operating on pure coincidence data that has meanwhile become widely known as QCA (Qualitative Comparative ...