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中药材提取物的混批勾兑研究 被引量:21
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作者 刘永锁 曹敏 +3 位作者 陈玉英 胡育筑 王义明 罗国安 《色谱》 CAS CSCD 北大核心 2006年第2期117-121,共5页
采用非线性最小二乘拟合计算中药材提取物的勾兑系数,不同批的中药材提取物经过勾兑后与参照样品的差异减小,各成分含量稳定。采用数据预处理的方法,并对数据预处理方法进行改进,使峰面积较小的色谱峰可以实现较小的相对差异。引入误差... 采用非线性最小二乘拟合计算中药材提取物的勾兑系数,不同批的中药材提取物经过勾兑后与参照样品的差异减小,各成分含量稳定。采用数据预处理的方法,并对数据预处理方法进行改进,使峰面积较小的色谱峰可以实现较小的相对差异。引入误差控制系数,可实现对特定色谱峰的控制要求。实验结果表明,非线性最小二乘拟合可以用于计算中药材提取物的勾兑系数。 展开更多
关键词 中药材 勾兑 非线性最小二乘拟合 预处理 误差控制系数
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Chaotic synchronization based on nonlinear state-observer and its application in secure communication
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作者 CHENMing-jie LIDian-pu ZHANGAi-jun 《Journal of Marine Science and Application》 2004年第1期64-70,共7页
Chaotic synchronization is a branch of chaotic control. Nowadays, the research and application of chaotic synchronization have become a hot topic and one of the development directions is for the research on chaos. In ... Chaotic synchronization is a branch of chaotic control. Nowadays, the research and application of chaotic synchronization have become a hot topic and one of the development directions is for the research on chaos. In this paper, a universal nonlinear stateobserver is presented for a class of universal chaotic systems to realize the chaotic synchronization, according to the theory of state-observer in the modern control theory. And theoretic analysis and simulation results have illustrated the validity of the approach. Moreover, the approach of synchronization proposed in this paper is very easy, flexible and universal with high synchronization precision.When the approach is applied to secure communication, the results are satisfying. 展开更多
关键词 chaotic synchronization nonlinear stoLe-observer synchronization error secure communication
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