The robust control issue for uncertain nonlinear system is discussed by using the method of right coprime factorization. As it is difficult to obtain the inverse of the right factor due to the high nonlinearity, the p...The robust control issue for uncertain nonlinear system is discussed by using the method of right coprime factorization. As it is difficult to obtain the inverse of the right factor due to the high nonlinearity, the proving of the Bezout identity becomes troublesome. Therefore, two sufficient conditions are derived to manage this problem with the nonlinear feedback system as well as that with the uncertain nonlinear feedback system under the definition of Lipschitz norm. A simulation of temperature control is given to demonstrate the validity of the proposed method.展开更多
目的:建立一测多评法同时测定陈皮中6个黄酮类成分的含量。方法:采用OSAKA CAPCELL PAK C18色谱柱(250 mm×4.6 mm, 5μm),流动相为乙腈-0.1%甲酸溶液,梯度洗脱;流速为1.0 mL·min^(-1),柱温为30℃,检测波长为330 nm。以橙皮苷...目的:建立一测多评法同时测定陈皮中6个黄酮类成分的含量。方法:采用OSAKA CAPCELL PAK C18色谱柱(250 mm×4.6 mm, 5μm),流动相为乙腈-0.1%甲酸溶液,梯度洗脱;流速为1.0 mL·min^(-1),柱温为30℃,检测波长为330 nm。以橙皮苷为内参物,计算橙皮苷与芸香柚皮苷、香蜂草苷、川陈皮素、3,5,6,7,8,3′,4′-七甲氧基黄酮、橘皮素之间的相对校正因子,分别采用一测多评法和外标法对15批陈皮中6个黄酮类成分的含量进行测定并比较结果。结果:6种成分在各自范围内线性关系良好(r≥0.999 9);平均加样回收率99.95%~102.97%,RSD 0.81%~2.03%。一测多评法与外标法的含量测定结果无显著性差异(P>0.05)。结论:本法可对陈皮的质量控制和评价提供科学参考。展开更多
基金supported by the National Natural Science Foundation of China(61304093,61472195)
文摘The robust control issue for uncertain nonlinear system is discussed by using the method of right coprime factorization. As it is difficult to obtain the inverse of the right factor due to the high nonlinearity, the proving of the Bezout identity becomes troublesome. Therefore, two sufficient conditions are derived to manage this problem with the nonlinear feedback system as well as that with the uncertain nonlinear feedback system under the definition of Lipschitz norm. A simulation of temperature control is given to demonstrate the validity of the proposed method.
