Results 41 to 50 of about 46,313 (294)

Vibration Suppression and Over-Quadrant Error Mitigation Methods for a Ball-Screw Driven Servo System With Dual-Position Feedback

IEEE Access, 2020
For high-precision control in a ball-screw driven servo system, the full-closed loop position control structure with position measurements from both the drive side and the load side are usually required.
Ming Yang, Qinan Ni, Xiaosheng Liu, Dianguo Xu   +3 more
doaj   +1 more source

Reamer Breakage during Intramedullary Nailing in Tibial Shaft Fractures: A Case Report and Review of Literature

Journal of Orthopedic and Spine Trauma, 2021
Background: Interlocked intramedullary nailing is the most common treatment for closed tibial fractures. Reaming is a fundamental step in this surgical technique, and reamer breakage is a rare yet challenging complication during this operation.
Mahlisha Kazemi, Mohammadhasan Sharafi, Ramin Shayan-Moghadam   +2 more
doaj   +1 more source

Some Fixed Point Results in Function Weighted Metric Spaces

Journal of Mathematics, 2021
After the establishment of the Banach contraction principle, the notion of metric space has been expanded to more concise and applicable versions. One of them is the conception of ℱ-metric, presented by Jleli and Samet.
Awais Asif, Nawab Hussain, Hamed Al-Sulami, Muahammad Arshad   +3 more
doaj   +1 more source

Tracking the soccer ball using multiple fixed cameras

, 2008
This paper demonstrates innovative techniques for estimating the trajectory of a soccer ball from multiple fixed cameras. Since the ball is nearly always moving and frequently occluded, its size and shape appearance varies over time and between cameras ...
Orwell, James, Jones, Graeme A., Jinchang Ren, Ming Xu, Graeme A. Jones, Jones, G., Ren, Jinchang, Xu, Ming, James Orwell, Xu, M., Orwell, J.   +10 more
core   +1 more source

A note on Riemann integrability

International Journal of Mathematics and Mathematical Sciences, 1978
In this note we define Riemann integrabillty for real valued functions defined on a compact metric space accompanied by a finite Borel measure. If the measure of each open ball equals the measure of its corresponding closed ball, then a bounded function ...
G. A. Beer
doaj   +1 more source

Multi-camera video surveillance for real-time analysis and reconstruction of soccer games

, 2010
Soccer analysis and reconstruction is one of the most interesting challenges for wide-area video surveillance applications. Techniques and system implementation for tracking the ball and players with multiple stationary cameras are discussed.
Orwell, James, Jones, Graeme A., Jones, G., Ren, Jinchang, Xu, Ming, Xu, M., Orwell, J.   +6 more
core   +1 more source

Multiplication of closed balls in Cn

, 2023
The first author was supported by FCT (Fundação para a Ciência e a Tecnologia), research project UIDB/00212/ 2020 (Portugal) of CMA-UBI (Centro de Matemática e Aplicações, Universidade da Beira Interior). The authors P. D. Beites and A. P. Nicolás were supported by the research project PID2021-123461NB-C22 (Spain).
Beites, Patrícia Damas, Nicolás, Alejandro, Vitoria, Jose   +2 more
openaire   +2 more sources

Study of the Contact Characteristics of Machine Tool Spindle Bearings under Strong Asymmetric Loads and High-Temperature Lubrication Oil

Lubricants, 2022
The contact characteristics of angular contact ball bearings are closely related to the thermal failure of high-speed spindle systems. This paper establishes a closed-loop iterative model for analyzing the ball–race contact characteristics of machine ...
Yanfang Dong, Feifan Chen, Ming Qiu, Huijie Wang, Chuanmeng Yang   +4 more
doaj   +1 more source

Peripheral Neutrophil Activation and Extracellular Trap Formation in Amyotrophic Lateral Sclerosis

Annals of Clinical and Translational Neurology, EarlyView.
Markers of neutrophil activation are increased in plasma during ALS, and markers of NET formation associate with ALS survival. ABSTRACT Objectives Peripheral neutrophil levels in amyotrophic lateral sclerosis (ALS) inversely correlate with survival, suggesting a role for neutrophils in disease progression.
Lillia A. Baird, Haley McQuown, Jihyun Park, Samuel J. Teener, Ian F. Webber‐Davis, Andrew D. Carter, Dae‐Gyu Jang, Eva L. Feldman, Stephen A. Goutman, Benjamin J. Murdock   +9 more
wiley   +1 more source

Analyzing of influencing factors on dynamic response characteristics of double closed-loop control digital hydraulic cylinder

Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2019
A digital hydraulic cylinder that uses mechanical closed-loop feedback regulation to realize double closed-loop control of displacement and velocity is designed in this study.
Yimin XIA, Yupeng SHI, Ye YUAN, Yumin ZHANG, Zhiwei YAO   +4 more
doaj   +1 more source