Filetype
Many problems in computer vision can be turned into a large-scale boolean optimization problem, which is in general NP-hard. In this paper, we further develop one of the most successful approaches, namely roof duality, for approximately solving such problems for higher-order models. Two new methods that can be applied independently or in combination are investigated. The first one is based on cons
A distributed model predictive control (DMPC) approach based on distributed optimization is applied to the power reference tracking problem of a hydro power valley (HPV) system. The applied optimization algorithm is based on accelerated gradient methods and achieves a convergence rate of O(1/k^2), where k is the iteration number. Major challenges in the control of the HPV include a nonlinear and l
Power system voltage security assessment is generally applied by considering the power system loadability surface. For a large power system, the loadability surface is a complicated hyper-surface in parameter space, and local approximations are a necessity for any analysis. Unfortunately, inequality constraints due to for example generator overexitation limiters, and higher codimension bifurcation
Lately, much work in the area of voltage stability assessment has been focused on finding post-contingency corrective controls. In this article a contribution to this area will be presented where we search for maximal loadability while considering post-contingency corrective controls. This objective is different from the usual approach to the problem, where the aim is to include the post-contingen
We present exploratory data analysis methods to assess inversion estimates using examples based on l(2)- and l(1)-regularization. These methods can be used to reveal the presence of systematic errors such as bias and discretization effects, or to validate assumptions made on the statistical model used in the analysis. The methods include bounds on the performance of randomized estimators of a larg
This paper examines the potential benefits of applying next best view planning to sequential 3D reconstruction from unordered image sequences. A standard sequential structure-and-motion pipeline is extended with active selection of the order in which cameras are resectioned. To this end, approximate covariance propagation is implemented throughout the system, providing running estimates of the unc
We consider the least-squares (L2) minimization problems in multiple view geometry for triangulation, homography, camera resectioning and structure-and-motion with known rotatation, or known plane. Although optimal algorithms have been given for these problems under an Linfinity cost function, finding optimal least-squares solutions to these problems is difficult, since the cost functions are not
As automatic sensing and information and communication technology get cheaper, building monitoring data becomes easier to obtain. The availability of data leads to new opportunities in the context of energy efficiency in buildings. This paper describes the development and validation of a data-driven grey-box modelling toolbox for buildings. The Python toolbox is based on a Modelica library with th
This chapter describes the architecture of a middleware layer between low-level sensing devices and higher level software layers, to support the requirements of a software infrastructure for networked enterprises. The development of such middleware layer is an important problem, as demonstrated by the number or research papers and the variety of approaches that can be found in literature. The main
We present the first method to handle curvature regularity in region-based image segmentation and inpainting that is independent of initialization. To this end we start from a new formulation of length-based optimization schemes, based on surface continuation constraints, and discuss the connections to existing schemes. The formulation is based on a cell complex and considers basic regions and bou
We construct a variational formulation for the problem of interpolating seismic data in the case of missing traces. We assume that we have derivative information available at the traces. The variational problem is essentially the minimization of the integral over the smallest eigenvalue of the structure tensor associated with the interpolated data. This has the physical meaning of penalizing the l
For many assembly operations force control is needed, but force sensors may be expensive and add mass to the system. An alternative is to use the motor torques, though friction causes large disturbances. The Coulomb friction can be quite well known when a joint is moving, but has much larger uncertainties for velocities close to zero. This paper presents a method for force estimation that account
One of the main limiting factors in improving glucose control for type 1 diabetes mellitus (T1DM) subjects is the lack of a precise description of meal and insulin intake effects on blood glucose. Knowing the magnitude and duration of such effects would be useful not only for patients and physicians, but also for the development of a controller targeting glycaemia regulation. Therefore, in this pa
We investigate dual decomposition approaches for optimization problems arising in low-level vision. Dual decomposition can be used to parallelize existing algorithms, reduce memory requirements and to obtain approximate solutions of hard problems. An extensive set of experiments are performed for a variety of application problems including graph cut segmentation, curvature regularization and more
We consider the problem of distributed convergence to efficient outcomes in coordination games through dynamics based on aspiration learning. Our first contribution is the characterization of the asymptotic behavior of the induced Markov chain of the iterated process in terms of an equivalent finite-state Markov chain. We then characterize explicitly the behavior of the proposed aspiration learnin
The historical development of responsibility for wars and aggressive acts has seen a shift of focus during the last century. Where the attention was previously focused on the unlawfulness of a State act (the Act of Aggression), the attention is now on the involvement and responsibility of individuals. The topic of this thesis is to follow the development of the possibility to hold those behind Sta
Even though the Community is based upon the principle of an open market economy with free competition, there are certain exemptions to this notion. One of the exemptions is the fulfilment of services of general economic interest, an exemption that elucidates the delicate conflict of interest between Member States' prerogative to provide accessible and affordable public services, and the Commun
The purpose of this thesis was to examine the EC Commission's role and policy in the EC control of state aid to companies that risk going out of business. The thesis explores the Commission's role in relation to the Member States as well as to the Community courts. It also examines the Commission's policy towards such aid in order to establish whether the Commission is coherent in its
Förorenaren betalar är en ekonomisk princip som internaliserar externa kostnader. Principen är således en metod genom vilken kostnader för förorening kan bli fördelade. Principen kan också beskrivas genom att använda ett rättviseargument, eftersom det kan anses rättvist att förorenaren ska betala för den förorening som han bidragit till. Förorenaren betalar har använts i internationell rätt och anThe polluter pays principle is an economic principle through which external costs can be internalised. The principle is thus a way of allocating costs for pollution. The principle can also be described using a fairness argument, where it would seem fair that the polluter pays the costs for the pollution which he has contributed to. It has been extensively used in international law, and has been re
Sammanfattning Detta examensarbete kommer att handla om relationen mellan den svenska åklagarmyndigheten och den europeiska åklagarmyndigheten med rättssäkerhet/effektivitet som examensarbetets teoretiska verktyg. En mycket viktig sak som måste påpekas är att den europeiska åklagarmyndigheten ännu ej finns, men EU är mycket angeläget om att inrätta myndigheten. Å ena sidan vill EU inrätta myndighe
