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- 저자 : Guiju Xu (검색결과 2 건)
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Guiju Xu,Jiangshuai Huang,Xiaojie Su 제어·로봇·시스템학회 2019 International Journal of Control, Automation, and Vol.17 No.1
In this paper, we propose a decentralized adaptive control scheme for a class of interconnected nonlinearsystems without a priori knowledge of subsystems’ control directions and unknown actuator failure. To addressthis problem, a novel Nussbaum-type function is proposed and a key theorem is drawn which involves quantifyingthe interconnections of multiple Nussbaum-type functions of the subsystems with different control directions in asingle inequality. The effect of actuator failures is successfully compensated. Global stability of the closed-loopsystem and asymptotic stabilization of subsystems’ output are proved and a simulation example is given to illustratethe effectiveness of the proposed control scheme.
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Association of multiple anthropometric indices with in 944,760 elderly Chinese people
Lirong Dong,Yuanyuan Wang,Jinshui Xu,Yang Zhou,Guiju Sun,Dakang Ji,Haijian Guo,Baoli Zhu 한국역학회 2023 Epidemiology and Health Vol.45 No.-
OBJECTIVES: The aims of this study were to update the latest data on the prevalence of hypertension (HTN) in the elderly Chinese population and to assess relationships between new anthropometric indices and HTN. METHODS: Data were obtained from the Basic Public Health Service (BPHS) survey for Jiangsu Province, China. A total of 944,760 people aged 65 years and older were included in this study. Blood pressure was measured by trained investigators. Body weight, body mass index (BMI), waist circumference (WC), waist-to-height ratio (WtHR), conicity index (COI), body roundness index (BRI), and a body shape index (ABSI) were included in the analysis as anthropometric indices. Logistic regression analysis and restricted cubic splines were used to evaluate the association of anthropometric indices with HTN. RESULTS: The prevalence of HTN among elderly residents of Jiangsu Province was 64.7% (95% confidence interval, 64.6 to 64.8). After adjusting for multiple covariates, all anthropometric indices except ABSI showed significant non-linear positive dose-response associations with HTN across sex (pnonlinear<0.001). Among participants with BMI <28 kg/m2, abnormal weight, WC, WtHR, BRI, COI, and ABSI were positively associated with HTN. CONCLUSIONS: The prevalence of HTN in the elderly in Jiangsu Province is gradually increasing. It is necessary to consider the combination of ABSI and COI with BMI for screening elderly individuals for HTN in follow-up prospective studies.
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