In this paper, the normal Luenberger function observer design for second-order descriptor linear systems is considered. It is shown that the main procedure of the design is to solve a so-called second-order generalize...In this paper, the normal Luenberger function observer design for second-order descriptor linear systems is considered. It is shown that the main procedure of the design is to solve a so-called second-order generalized Sylvester-observer matrix equation. Based on an explicit parametric solution to this equation, a parametric solution to the normal Luenberger function observer design problem is given. The design degrees of freedom presented by explicit parameters can be further utilized to achieve some additional design requirements.展开更多
Background:The incidence of liver injury caused by anti-tuberculous(TB)drugs is very high.However,owing to a lack of sufficient evidence,preventive use of hepatoprotective drugs is not yet recommended.Therefore,we aim...Background:The incidence of liver injury caused by anti-tuberculous(TB)drugs is very high.However,owing to a lack of sufficient evidence,preventive use of hepatoprotective drugs is not yet recommended.Therefore,we aimed to assess the protective effect of hepatoprotective drugs for anti-TB drug-induced liver injury.Methods:We conducted a literature search in China Biology Medicine disc,China National Knowledge Infras-tructure,WanFang,Chinese Scientific and Technological Journal,PubMed,Cochrane Library,Web of Science,and Embase.We performed meta-analysis using R 4.0 and Review Manager 5.3 software.Results:A total of 18 studies involving 3589 patients from 2 groups were included.Use of hepatoprotective drugs contributed to a lower incidence of liver injury as compared with conventional anti-TB treatment alone(relative risk[RR]=0.39,95%confidence interval[CI]:0.28-0.53,p<0.001).In subgroup analysis,significant protective effects were noted for mild liver injury(RR=0.30,95%CI 0.15-0.58),moderate(or severe)liver injury(RR=0.35,95%CI 0.19-0.65),and liver injury within 2-4 weeks(RR=0.37,95%CI 0.19-0.71).We also found a statistically significant difference in the incidence of drug withdrawal(RR=0.58,95%CI 0.34-0.97,p=0.040).Conclusions:Our results demonstrate that hepatoprotective drugs are effective in preventing liver injury in pa-tients receiving anti-TB treatment,to some extent.展开更多
基金This work was supported by National Natural Science Foundation of China(No.60710002)Program for Changjiang Scholars and Innovative Research Team in University(PCSIRT).
文摘In this paper, the normal Luenberger function observer design for second-order descriptor linear systems is considered. It is shown that the main procedure of the design is to solve a so-called second-order generalized Sylvester-observer matrix equation. Based on an explicit parametric solution to this equation, a parametric solution to the normal Luenberger function observer design problem is given. The design degrees of freedom presented by explicit parameters can be further utilized to achieve some additional design requirements.
基金supported by grants from the National Natural Science Foundation of China(grant number 82172249)the Natural Science Foundation of Fujian Province(No.2019J01316,2020J01607).
文摘Background:The incidence of liver injury caused by anti-tuberculous(TB)drugs is very high.However,owing to a lack of sufficient evidence,preventive use of hepatoprotective drugs is not yet recommended.Therefore,we aimed to assess the protective effect of hepatoprotective drugs for anti-TB drug-induced liver injury.Methods:We conducted a literature search in China Biology Medicine disc,China National Knowledge Infras-tructure,WanFang,Chinese Scientific and Technological Journal,PubMed,Cochrane Library,Web of Science,and Embase.We performed meta-analysis using R 4.0 and Review Manager 5.3 software.Results:A total of 18 studies involving 3589 patients from 2 groups were included.Use of hepatoprotective drugs contributed to a lower incidence of liver injury as compared with conventional anti-TB treatment alone(relative risk[RR]=0.39,95%confidence interval[CI]:0.28-0.53,p<0.001).In subgroup analysis,significant protective effects were noted for mild liver injury(RR=0.30,95%CI 0.15-0.58),moderate(or severe)liver injury(RR=0.35,95%CI 0.19-0.65),and liver injury within 2-4 weeks(RR=0.37,95%CI 0.19-0.71).We also found a statistically significant difference in the incidence of drug withdrawal(RR=0.58,95%CI 0.34-0.97,p=0.040).Conclusions:Our results demonstrate that hepatoprotective drugs are effective in preventing liver injury in pa-tients receiving anti-TB treatment,to some extent.
