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- Ahlberg, Jörgen, et al.
(författare)
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Ground Target Recognition in a Query-Based Multi-Sensor Information System
- 2006
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Rapport (övrigt vetenskapligt)abstract
- We present a system covering the complete process for automatic ground targetrecognition, from sensor data to the user interface, i.e., from low level imageprocessing to high level situation analysis. The system is based on a query languageand a query processor, and includes target detection, target recognition,data fusion, presentation and situation analysis. This paper focuses on targetrecognition and its interaction with the query processor. The target recognitionis executed in sensor nodes, each containing a sensor and the corresponding signal/image processing algorithms. New sensors and algorithms are easily addedto the system. The processing of sensor data is performed in two steps; attributeestimation and matching. First, several attributes, like orientation and dimensions,are estimated from the (unknown but detected) targets. These estimatesare used to select the models of interest in a matching step, where the targetis matched with a number of target models. Several methods and sensor datatypes are used in both steps, and data is fused after each step. Experimentshave been performed using sensor data from laser radar, thermal and visualcameras. Promising results are reported, demonstrating the capabilities of thetarget recognition algorithms, the advantages of the two-level data fusion andthe query-based system.
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| 4. |
- Andersson, Carin.E, 1965-, et al.
(författare)
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A Master Program in Project Management : Experiences from combining hard and soft skills
- 2011
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Ingår i: Nordic Academy of Management (NFF) 2011 Conference.
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Konferensbidrag (övrigt vetenskapligt)abstract
- Project management skills are needed in a growing number of areas, all with specific requirements regarding technical and social competencies. Still, the majority of project management training is focusing on technical tools and techniques, emphasized in standards suggested by global professional project management associations. Uncertainties and unique social settings require a managerial approach different from the linear, rational and analytical view of the world provided by international standards such as the PMBOK Guide. A new approach to project management education is needed that deals with the complexity of today’s project environments. This paper describes a one year master program in project management at the KarlstadUniversity in Sweden. The program is general and focuses on issues regardless of business area or project type, and mix both technical and social skills. The program was initiated in 2002 and more than 200 students have until today been part of the program. In addition to the mandatory courses in the program, several students have, on voluntary basis, passed the IPMA D-level certification. The paper also presents the results from two different types of evaluations showing that the majority of the students have great use of their education in their current employment.Keywords: project management education; project management knowledge; soft skills; hard skills; pedagogic
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| 7. |
- Bauer, D., et al.
(författare)
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Some facts about the choice of the weighting matrices in Larimore type of subspace algorithms
- 2002
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Ingår i: Automatica. - 0005-1098. ; 38:5, s. 763-773
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Tidskriftsartikel (refereegranskat)abstract
- In this paper the effect of some weighting matrices on the asymptotic variance of the estimates of linear discrete time state space systems estimated using subspace methods is investigated. The analysis deals with systems with white or without observed inputs and refers to the Larimore type of subspace procedures. The main result expresses the asymptotic variance of the system matrix estimates in canonical form as a function of some of the user choices, clarifying the question on how to choose them optimally. It is shown, that the CCA weighting scheme leads to optimal accuracy. The expressions for the asymptotic variance can be implemented more efficiently as compared to the ones previously published. © 2002 Elsevier Science Ltd. All rights reserved.
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| 8. |
- Bergman, Niclas, et al.
(författare)
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Terrain Navigation using Bayesian Statistics
- 1999
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Rapport (övrigt vetenskapligt)abstract
- In aircraft navigation the demands on reliability and safety are veryhigh.The importance of accurate position and velocity informationbecomes crucial when flying an aircraft at low altitudes, andespecially during the landing phase. Not only should the navigationsystem have a consistent description of the position of the aircraft,but also a description of the surrounding terrain, buildings and otherobjects that are close to the aircraft. Terrain navigation is a navigation scheme that utilizes variations inthe terrain height along the aircraft flight path.Integrated with anInertial Navigation System (INS), it yields high performance positionestimates in an autonomous manner, ie without any support informationsent to the aircraft. In order to obtain these position estimates, anonlinear recursive estimation problem must be solved on-line.Traditionally, this filtering problem has been solved by locallinearization of the terrain at one or several assumed aircraftpositions. Due to changing terrain characteristics, theselinearizations will in some cases result in diverging positionestimates. In this work, we show how the Bayesian approach gives acomprehensive framework for solving the recursive estimation problemin terrain navigation. Instead of approximating the model of theestimation problem, the analytical solution is approximatelyimplemented. The proposed navigation filter computes a probabilitymass distribution of the aircraft position and updates thisdescription recursively with each new measurement. The navigationfilter is evaluated over a commercial terrain database, yieldingaccurate position estimates over several types of terraincharacteristics.Moreover, in a Monte Carlo analysis, it showsoptimal performance as it reaches the Cramér-Rao lower bound.
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| 9. |
- Bjorklund, S., et al.
(författare)
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An improved phase method for time-delay estimation
- 2009
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Ingår i: Automatica. - 0005-1098. ; 45:10, s. 2467-2470
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Tidskriftsartikel (refereegranskat)abstract
- A promising method for estimation of the time-delay in continuous-time linear dynamical systems uses the phase of the all-pass part of a discrete-time model of the system. We have discovered that this method can sometimes fail totally and we suggest a method for avoiding such failures.
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| 10. |
- Björklund, Svante, et al.
(författare)
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A review of time-delay estimation techniques
- 2003
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Ingår i: PROCEEDINGS OF THE 42ND IEEE CONFERENCE ON DECISION AND CONTROL, VOLS 1-6, PROCEEDINGS. - New York, USA : IEEE conference proceedings. - 0-7803-7924-1 ; s. 2502-2507
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Konferensbidrag (refereegranskat)abstract
- This paper reviews and evaluates suggested methods for estimating the time-delay of linear systems in automatic control applications. A classification of the methods according to the underlying principles is suggested. The evaluation, done by analyzing the estimates of the methods from extensive simulated data in open loop, shows that different classes of methods have different properties and are suitable in different cases. Some method are clearly inferior to others. Recommendations are given on how to choose estimation method and input signal.
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