Fieldbus-based control systems (FCS) have been increasingly used in process automation. Some processes and dynamic specifications need higher control frequencies to avoid instability. The aim of this paper is to analyze the temporal characteristics of communication and computation tasks and the configuration of the function blocks in a FCS and to allow the control interval to be shortened. An FCS for a water tank process is used as a case study. The experimental results show that the execution time of function blocks and the margin time are dominant over communication delays, and optimizing configuration by reducing the number of external links can contribute to increasing the control frequency.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/s0019-0578(07)60224-9 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Burden and attributable risk factors of non-communicable diseases and subtypes in 204 countries and territories, 1990-2021: a systematic analysis for the global burden of disease study 2021.
Int J Surg
January 2025
Li Ka Shing Faculty of Medicine, University of Hong Kong, Pokfulam, Hong Kong, SAR.
Background: Understanding based on up-to-date data on the burden of non-communicable diseases (NCDs) is limited, especially regarding how subtypes contribute to the overall NCD burden and the attributable risk factors across locations and subtypes. We aimed to report the global, regional, and national burden of NCDs, subtypes, and attributable risk factors in 2021, and trends from 1990 to 2021 by age, sex, and socio-demographic index (SDI).
Materials And Methods: We used data from the Global Burden of Disease Study 2021 to estimate the prevalence, deaths, and disability-adjusted life years (DALYs) for NCDs and subtypes, along with attributable risk factors.
Fully guided system for position-predictable autotransplantation of teeth: A randomized clinical trial.
Int Endod J
January 2025
Department of Oral and Maxillofacial Surgery, Guangdong Engineering Research Center of Oral Restoration and Reconstruction Guangzhou Key Laboratory of Basic and Applied Research of Oral Regenerative Medicine, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangzhou, China.
Aim: Autotransplantation of teeth (ATT) is a viable biological method for addressing dental defects. The objective was to achieve occlusal reconstruction-orientated ATT to enhance functionality and obtain optimal location and adjacency. This study proposes a new concept of a guide (a fully guided system) to achieve position-predictable ATT.
View Article and Find Full Text PDFTreatment of Surgical Scars with Fractional Carbon Dioxide (CO) Laser: A Randomized Controlled Trial.
Adv Wound Care (New Rochelle)
January 2025
Department of Dermatology, The Second Affiliated Hospital of Wannan Medic-al College, Wuhu, Anhui, China.
The aim of this study was to compare the long-term effects of fractional carbon dioxide (CO) laser treatment with traditional therapy on surgical scars by analyzing and comparing observational indicators. A randomized controlled trial was conducted on 116 patients who received scar treatment in our hospital, of which 58 patients received fractional CO laser treatment, and 58 patients received injection treatment. The outcome measures comprised the Vancouver Scar Scale (VSS) and the Patient and Observer Scar Assessment Scale (POSAS).
View Article and Find Full Text PDFAssociation of Pretreatment Serum Indirect Bilirubin Levels With Prognostic and Therapeutic Value in Patients With Newly Diagnosed Acute Myeloid Leukemia.
Cancer Med
February 2025
Department of Hematology, The Second Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, Jiangxi, China.
Background: Bilirubin has anti-inflammatory, antioxidant, and anti-cancer properties, with an inverse relationship between its levels and cancer risk and prognosis. However, the prognostic value of serum bilirubin in acute myeloid leukemia (AML) remains uncertain.
Methods: This retrospective study analyzed pretreatment serum total bilirubin (TBIL), direct bilirubin (DBIL), and indirect bilirubin (IBIL) in 284 AML patients and 316 healthy controls.
Cardiovascular, cancer, and infection risks of Janus kinase inhibitors in rheumatoid arthritis and ulcerative colitis: A nationwide cohort study.
J Intern Med
January 2025
School of Pharmacy, Sungkyunkwan University, Suwon, South Korea.
Background: Evolving evidence suggests that patients undergoing treatment with Janus kinase inhibitors (JAKi) may face an increased risk of cardiovascular events, malignancies, and serious infections.
Objectives: We assessed cardiovascular, malignancy, and serious infection risks associated with JAKi use compared to tumor necrosis factor inhibitor (TNFi) use, which served as the active comparator, in patients with rheumatoid arthritis (RA) or ulcerative colitis (UC).
Methods: This study emulated a target trial using South Korea's nationwide claims database (2013-2023).
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!