This article presents a consistency control algorithm for the autonomous underwater vehicle (AUV) group combined with the leader-follower approach under communication delay. First, the six-degree-of-freedom (DoF) model of AUV is represented, and the graph theory is used to describe the communication topology of the AUV group. Especially, a hybrid communication topology is introduced to adapt to large formation control. Second, the distributed control law is constructed by combining the consensus theory with the leader-follower method. The consistency control algorithms for homogeneous and heterogeneous AUV groups based on the leader-follower approach under communication delay are proposed. Stability criteria are established to guarantee the consensus based on the Gershgorin disk theorem and Nyquist law, respectively. Finally, numerous simulation experiments are carried out to show the effectiveness and superiority of the proposed algorithms.
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http://dx.doi.org/10.3389/fbioe.2022.848641 | DOI Listing |
J Coll Physicians Surg Pak
October 2024
Department of Ultrasound Imaging, The First College of Clinical Medical Science, China Three Gorges University and Yichang Central People's Hospital, Yichang, China.
Objective: To determine the diagnostic value of conventional ultrasound combined with S-Detect and elastic imaging technology in differentiating between benign and malignant breast nodules.
Study Design: Observational study. Place and Duration of the Study: Department of Ultrasound Imaging, Yichang Central People's Hospital, Yichang, China, from October 2019 to October 2022.
Sensors (Basel)
September 2024
State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China.
Sci Rep
September 2024
Digital Process Engineering Group, Institute for Mechanical Process Engineering and Mechanics, Karlsruhe Institute of Technology, 76187, Karlsruhe, Germany.
Adaptive sampling and situational awareness are key features of modern autonomous underwater vehicles (AUVs) since data quality can be improved while operation time and cost can be reduced. An example for adaptive sampling in the marine environmental context is thermocline detection and tracking. The thermocline as horizontal ocean layer separates warm and cold water and is a key feature in many marine disciplines.
View Article and Find Full Text PDFUrology
December 2024
Division of Urology, The Hospital for Sick Children, Toronto, ON, Canada.
Objective: To compare postnatal outcomes of anterior urethral valves (AUV) and posterior urethral valves (PUV) patients to evaluate for potential differences between these conditions, given that AUV with or without concomitant PUV is a rare congenital anomaly leading to lower urinary tract obstruction (LUTO).
Methods: We reviewed our LUTO database and included patients with AUV or concomitant AUV+PUV, managed at our institution between 2003 and 2023 matching them to comparable PUV cases. Assessed variables included prenatal diagnosis, gestational age (GA) at birth, initial management, kidney function, presence and degree of hydronephrosis (HN), and need for renal replacement therapy (RRT).
N Engl J Med
June 2024
From the Departments of Gastrointestinal Oncology (M.C., Y.L.V., P.B.T., C.G., S.D., N.V.B., I.L.H., M.E.V.L.), Medical Oncology (M.C., C.G., N.V.B., E.E.V., J.B.H.), Biometrics (S.B.), Surgery (B.A.G., K.K., G.L.B.), Pathology (P.S., J.G.B.), Molecular Oncology and Immunology (E.E.V., T.N.S.), and Radiology (R.G.B.-T.), and the Division of Molecular Carcinogenesis (L.F.W.), Netherlands Cancer Institute, and the Department of Gastroenterology and Hepatology, OLVG Hospital (A.U.V.L.), Amsterdam, the Department of Surgery, Catharina Hospital Eindhoven, Eindhoven (J.W.B.), the Department of Surgery, Haga Hospital, the Hague (T.S.A.), the Department of Surgery, Tergooi MC, Hilversum (E.R.H.), the Department of Surgery, Spaarne Gasthuis, Haarlem (S.J.O.), Oncode Institute, Utrecht (E.E.V., L.F.W., T.N.S.), the Faculty of EEMCS, Delft University of Technology, Delft (L.F.W.), GROW School for Oncology and Reproduction, Maastricht University, Maastricht (R.G.B.-T., G.L.B.), and the Departments of Gastroenterology and Hepatology (M.E.V.L.), Hematology (T.N.S.), and Medical Oncology (J.B.H.), Leiden University Medical Center, Leiden - all in the Netherlands; the Faculty of Medicine, University of Iceland, Reykjavik (P.S.); and the Melanoma Clinic, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland (J.B.H.).
Background: Mismatch repair-deficient (dMMR) tumors can be found in 10 to 15% of patients with nonmetastatic colon cancer. In these patients, the efficacy of chemotherapy is limited. The use of neoadjuvant immunotherapy has shown promising results, but data from studies of this approach are limited.
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