This paper proposes a tube-based model predictive control strategy for linear systems with bounded disturbances and input delay to ensure input-to-state stability. Firstly, the actual disturbed system is decomposed into a nominal system without disturbances and an error system. For the nominal system, solving an optimization problem, where the delayed control input is set as an optimization variable, yields a nominal control law that enables the nominal state signal to approach to zero. Then, for the error system, the Razumikhin approach is used to identify a robust control invariant set. Using the set invariance theorem, an ancillary control law is developed to confine the error state signal in the invariant set. Combining the two results, we obtain a control law that enables the state signal to remain within a robustly invariant tube. Finally, the effectiveness of the developed control strategy is validated by simulations.
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http://dx.doi.org/10.1016/j.isatra.2024.04.030 | DOI Listing |
Health Promot Chronic Dis Prev Can
January 2025
Department of Psychiatry and Behavioral Sciences, Medical University of South Carolina, Charleston, SC, USA.
An analysis of 1771 Canadian adults who smoke or used to smoke cigarettes was conducted using data from the 2022 International Tobacco Control Four Country Smoking and Vaping Survey. Using weighted data, we estimated the prevalence of Canadian adults who tried to quit smoking between 2020 and 2022, and the use of a nicotine vaping product (NVP) and the flavours and devices used most often at their most recent quit attempt. Overall, 36.
View Article and Find Full Text PDFThe rape and murder of a trainee doctor in RG Kar Medical College in Kolkata on August 9, 2024, was a brutal crime but had nothing to do with patients or violence by patients or their attendants against health workers. The accused is a civic volunteer who is said to have frequented the hospital as a tout, fleecing patients by promising to get them a bed or help them get tests done for free or at discounted rates [1]. However, following the incident, the protests by doctors, mostly resident doctors' associations across the country, zeroed in on protection for doctors and health workers from violence and attacks by patients through a central law as one of their main demands [2].
View Article and Find Full Text PDFBMC Med Ethics
January 2025
Klinic Community Health, Winnipeg, MB, Canada.
Background: This study explored the ethical issues associated with community-based HIV testing among African, Caribbean, and Black (ACB) populations in Canada, focusing on their perceptions of consent, privacy, and the management of HIV-related data and bio-samples.
Methods: A qualitative community-based participatory research (CBPR) approach was employed to actively engage ACB community members in shaping the research process. The design included in-depth qualitative interviews with 33 ACB community members in Manitoba, Canada.
Sci Rep
January 2025
School of Electronic Science and Engineering, Xiamen University, Xiamen, 361005, China.
Metasurfaces have exhibited excellent capabilities in controlling main characteristics of electromagnetic fields. Thus, a lot of significant achievements have been attained in many areas especially in the fields of hologram and near-field imaging. However, some of these designs are implemented in a manner of interleaved subarrays that complicates the design and makes them difficult to achieve integration.
View Article and Find Full Text PDFFuture Cardiol
January 2025
Nanomaterial and Devices Laboratory, School of Engineering, Computing and Mathematics, Faculty of Science and Technology, University of Plymouth, Plymouth, Devon, UK.
Introduction: Little information exists regarding the detection of early coronary heart disease protein biomarkers. The aim of this study was to investigate several potential candidates.
Methods: Systematic review was carried out followed by meta-analysis.
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