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Jansen, S. (author), Alirezaei, M. (author), Kanarachos, S. (author)In this paper a novel adaptive regenerative braking control concept for electric vehicles with an electric motor at the front axle is presented. It is well known that the "phased" type regenerative braking systems of category B maximize the amount of regenerative energy during braking. However, there is an increased risk of maneuvering...article 2014
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Stubbe, J.H. (author), Chorus, A.M.J. (author), Frank, L.E. (author), de Hon, O. (author), van der Heijden, P.G.M. (author)Studies on the use of performance enhancing drugs (PED) in fitness centres rely predominately on conventional survey methods using direct questioning. However, research indicates that direct questioning of sensitive information is characterized by under-reporting. The aim of the present study was to contrast direct questioning of different types...article 2014
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Noack, B. (author), Sijs, J. (author), Hanebeck, U.D. (author)Distributed implementations of state estimation algorithms generally have in common that each node in a networked system computes an estimate on the entire global state. Accordingly, each node has to store and compute an estimate of the same state vector irrespective of whether its sensors can only observe a small part of it. In particular, the...conference paper 2014
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Kanarachos, S.A. (author), Alirezaei, M. (author), Jansen, S.T.H. (author), Maurice, J.P. (author)In this paper the systematic development of an integrated braking controller for a vehicle driven by an electric motor on the front axle is presented. The objective is to engage the electric motor only during braking, up to the point at which the vehicle reaches its manoeuvrability and stability limit. The control challenges are to distribute...article 2014
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van Eekeren, A.W.M. (author), Dijk, J. (author), Burghouts, G. (author)Airborne platforms are recording large amounts of video data. Extracting the events which are needed to see is a timedemanding task for analysts. The reason for this is that the sensors record hours of video data in which only a fraction of the footage contains events of interest. For the analyst, it is hard to retrieve such events from the...conference paper 2014
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Cramp, A.J. (author), van den Berg, T.W. (author), Huiskamp, W. (author)Performance assessment is a key factor in designing distributed simulation environments that are fit-forpurpose and cost-effective. Simulations used for training applications should provide the required level of responsiveness and interactivity. Simulations used for analysis or decision support should execute as fast as possible to enable quick...conference paper 2014
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Schmidt, R.D.O. (author), Sadre, R. (author), Sperotto, A. (author), van den Berg, H. (author), Pras, A. (author)An important task for network operators is to properly dimension the capacity of their links. Often, this is done by simple rules of thumb based on coarse traffic measurements provided, e.g., by SNMP. More accurate estimations of the required link capacity typically require packet-level measurements, which are hard to implement in today's high...article 2014
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Risto, M. (author), Martens, M.H. (author)Purpose: In-car support systems focus increasingly on improving traffic flow and throughput. Advisory systems allow for fast market penetration, advising drivers how to drive in order to improve general flow. By following the advice, drivers cannot create a beneficial effect by themselves but rely on other road users to comply as well. Drivers...article 2014
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Sijs, J. (author), Kester, L.J.H.M. (author), Noack, B. (author)To reduce the amount of data transfer in networked systems measurements are usually taken only when an event occurs rather than periodically in time. However, a fundamental assessment on the response of estimation algorithms receiving event sampled measurements is not available. This research presents such an analysis when new measurements are...conference paper 2014
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Paap, B.F. (author), Steeghs, T.P.H. (author)In order to allow quantification of the strength of local micro-seismic events recorded at the CCS pilot site in Ketzin in terms of local magnitude, earthquake data recorded by standardized seismometers were used. Earthquakes were selected that occurred in Poland and Czech Republic and that were detected both on the Ketzin array and on nearby...conference paper 2014
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Chirkin, A.M. (author), Belloum, A.S.Z. (author), Kovalchuk, S.V. (author), Makkes, M.X. (author)Estimation of the execution time is an important part of the workflow scheduling problem. The aim of this paper is to highlight common problems in estimating the workflow execution time and propose a solution that takes into account the complexity and the randomness of the workflow components and their runtime. The solution proposed in this...conference paper 2014
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Tangelder, J.W.H. (author), Lebert, E. (author), Burghouts, G.J. (author), van Zon, K. (author), Den Uyl, M.J. (author)This paper presents a novel approach to detect persons in video by combining optical flow based motion analysis and silhouette based recognition. A new fast optical flow computation method is described, and its application in a motion based analysis framework unifying human tracking and detection is outlined. Our optical flow algorithm...conference paper 2014
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Risto, M. (author), Martens, M.H. (author)In order to guarantee safety, drivers are advised to keep large enough headways. However, headway advice is often provided in terms of time headway, without knowing whether this is the right way of presenting the advice. According to a psychophysics theory, attaining a time headway would indeed allow drivers to show higher headway choice...article 2013
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Tavasszy, L.A. (author), de Jong, G. (author)Data are essential for any empirical modelling effort. In freight transport, obtaining good data for modelling can be a challenge because of the difficulty to observe freight processes directly, the often proprietary nature of logistics data, and a relatively poor data acquisition infrastructure. In this chapter we review the different data...bookPart 2013
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Vink, G. (author), van Buuren, S. (author)We propose a new multiple imputation technique for imputing squares. Current methods yield either unbiased regression estimates or preserve data relations. No method, however, seems to deliver both, which limits researchers in the implementation of regression analysis in the presence of missing data. Besides, current methods only work under a...article 2013
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Koeman, T. (author), Offermans, N.S.M. (author), Christopher-De Vries, Y. (author), Slottje, P. (author), van den Brandt, P.A. (author), Goldbohm, R.A. (author), Kromhout, H. (author), Vermeulen, R. (author)Background: In epidemiological studies, occupational exposure estimates are often assigned through linkage of job histories to job-exposure matrices (JEMs). However, available JEMs may have a coding system incompatible with the coding system used to code the job histories, necessitating a translation of the originally assigned job codes. Since...article 2013
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Rubingh, C.M. (author), Martens, H. (author), van der Voet, H. (author), Smilde, A.K. (author)Each data-driven action in data modelling consumes degrees of freedom, whether it concerns estimation of parameters, estimation of meta-parameters or selecting variables. By using a double cross validation approach for degrees of freedom calculation the costs for meta-parameter estimation and variable selection can be determined explicitly. The...article 2013
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van der Hall, E.W. (author)This thesis presents an algorithm that can reduce the estimation errors made with the DriftLessTM bias estimation technique. The algorithm utilizes the autocorrelation function to detect the presence of errors, and a minimization function to reduce these errors. The algorithm has been validated with simulations. A sensor signal contains noise,...doctoral thesis 2013
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Berkhoff, A. (author), van Ophem, S. (author)The feed-forward broadband active noise control problem can be formulated as a state estimation problem to achieve a faster rate of convergence than the filtered reference least mean squares algorithm and possibly also a better tracking performance. A multiple input/multiple output Kalman algorithm is used to perform this state estimation. To...conference paper 2013
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Nabi, M. (author), Geilen, M.M.C.W. (author), Basten, T.A.A. (author)Sensor nodes in many Wireless Body Area Network (WBAN) architectures are supposed to deliver sensed data to a gateway node on the body. To satisfy the data delivery requirements, the network needs to adapt itself to the changes in connection status of the body nodes to the gateway. As a prerequisite, Link Quality Estimation (LQE) needs to be...conference paper 2013