Confidence driven TGV fusion

We introduce a novel model for spatially varying variational data fusion, driven by point-wise confidence values. The proposed model allows for the joint estimation of the data and the confidence values based on the spatial coherence of the data. We discuss the main properties of the introduced model as well as suitable algorithms for estimating the solution of the corresponding biconvex minimization problem and their convergence. The performance of the proposed model is evaluated considering the problem of depth image fusion by using both synthetic and real data from publicly available datasets

An FMCW radar system for short range surface contour mapping

The surface of a fluidized bed combustor may be indicative of problems, such as agglomeration, occurring within the bed material. The imaging system described in this dissertation has the potential of becoming a diagnostic tool to serve this purpose. The goal of this project was to design and evaluate a radar-based, phased-array system for capturing the surface contours of static surfaces located short distances (approximately 8 ft.) from the antenna array;The energy source for the contour mapping system was a frequency modulated, continuous wave (FMCW) radar. Since the frequency of a demodulated FCMW signal is proportional to the distance to the target, the dominant frequency component of the output from the beamforming algorithm is an estimate of the distance to the surface;This dissertation describes the equipment arrangement, the noise removal methods, and the delay and sum beamforming algorithm. In addition, results for several different surface types and structures are presented and discussed. Since it is shown that this prototype system has limitations, recommendations for future modifications are also suggested

Indoor wireless communications and applications

Chapter 3 addresses challenges in radio link and system design in indoor scenarios. Given the fact that most human activities take place in indoor environments, the need for supporting ubiquitous indoor data connectivity and location/tracking service becomes even more important than in the previous decades. Specific technical challenges addressed in this section are(i), modelling complex indoor radio channels for effective antenna deployment, (ii), potential of millimeter-wave (mm-wave) radios for supporting higher data rates, and (iii), feasible indoor localisation and tracking techniques, which are summarised in three dedicated sections of this chapter

Design and Construction of Parabolic Solar Heater Using Polymer Matrix Composite

A parabolic dish is a type of concentrating reflective device that uses the shape of a circular paraboloid to collect or project energy such as light, sound, or radio waves. The parabolic reflector transforms an incoming plane wave traveling along the axis into a spherical wave converging toward the focus. In this work concentrating dish was moulded from polyester resin reinforced with fiber glass mat and inner surface lined with Aluminum foil to increase the reflectivity. The design was made up of a moulded dish of 246cm diameter with a height of 58.2cm which has a concentration factor of 54.9. The collector was mounted on a site with latitude 6 40 22.19 and longitude 3 09 47.12 and water at 270C was heated to a temperature of 850C within 20 minutes