Ellipse center extraction is the important basis of camera calibration with circle arrays calibration board, which directly affects the measurement accuracy of machine vision system.Aiming at the problem of high noise sensitivity of the most ellipse center extraction methods, a high robust multi-ellipse center extraction method is proposed.The idea
ABSTRACT Background: Racial variation in the clinical presentation of rheumatoid arthritis (RA) and its response to treatment is well known.Ethnicity and associated socioeconomic factors make it necessary to study the effectiveness of Animal Art the antirheumatic drugs such as sulfasalazine (SSZ) in our RA patients, and to what extent it interacts
In this paper, a leaky-wave antenna (LWA) array based on substrate integrated waveguide (SIW) is proposed for generating bilateral secant-distributed radiation pattern, which can cover a wide angular range including broadside direction.The LWA array contains two antenna elements and a power recycling network.Each element contains a composite slot c
BackgroundAcute aortic dissection (AAD) is a life-threatening medical condition with high early fatality.Therefore, a prompt and precise diagnosis, which can be achieved through invasive and non-invasive techniques is vital.Echocardiography, unlike MRI and CT, is accessible in emergency units and bedside-compatible.The recommended echocardiographic