Searched for: subject:"calibration"
(1 - 20 of 129)

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Guatame Garcia, L.A. (author), Buxton, M.W.N. (author)
In the production of calcined kaolin, the soluble Al2O3 content is used as a quality control criterion for some speciality applications. The increasing need for automated quality control systems in the industry has brought the necessity of developing techniques that provide (near) real-time data. Based on the understanding that the presence of...
journal article 2018
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Vonach, Tanja (author), Tscheikner- Gratl, F. (author), Rauch, Wolfgang (author), Kleidorfer, Manfred (author)

Although calibration of a hydrodynamic model depends on the availability of measurement data representing the system behavior, advice for the planning of necessary measurement campaigns for model calibration is scarce. This work tries to address this question of efficient measurement site selection on a network scale for the objective of...

journal article 2018
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Hà, T.L. (author), Bastiaanssen, W.G.M. (author), van Griensven, Ann (author), Van Dijk, Albert I J M (author), Senay, Gabriel B. (author)

In this paper, evapotranspiration (ET) and leaf area index (LAI) were used to calibrate the SWAT model, whereas remotely sensed precipitation and other climatic parameters were used as forcing data for the 6300 km2 Day Basin, a tributary of the Red River in Vietnam. The efficacy of the Sequential Uncertainty Fitting (SUFI-2) parameter...

journal article 2018
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Akter, S. (author), Makinwa, K.A.A. (author), Bult, K. (author)

This paper presents a new dynamic residue amplifier topology for pipelined analog-to-digital converters. With an input signal of 100 mVpp,diff and 4 × gain, it achieves-100-dB total harmonic distortion, the lowest ever reported for a dynamic amplifier. Compared to the state of the art, it exhibits 25 dB better linearity with twice...

journal article 2018
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Pan, S. (author), Luo, Yanquan (author), Heidary Shalmany, S. (author), Makinwa, K.A.A. (author)

This paper describes a high-resolution energy-efficient CMOS temperature sensor, intended for the temperature compensation of MEMS/quartz frequency references. The sensor is based on silicided poly-silicon thermistors, which are embedded in a Wien-bridge RC filter. When driven at a fixed frequency, the filter exhibits a temperature-dependent...

journal article 2018
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van de Ven, Oscar (author), Vogel, J.G. (author), Xia, Sha (author), Spronck, J.W. (author), Nihtianov, S. (author)
High-precision positioning often requires high speed and high resolution displacement measurements in order to compensate for the small vibrations of critical components. The displacement sensor must be precise and stable over a long period of time to avoid expensive recalibration. This requires tight mounting tolerances, which are especially...
journal article 2018
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Wieneke, B.F.A. (author)
The fundamental properties of computed flow fields using particle imaging velocimetry (PIV) have been investigated, viewing PIV processing as a black box without going in detail into algorithmic details. PIV processing can be analyzed using a linear filter model, i.e. assuming that the computed displacement field is the result of some spatial...
doctoral thesis 2017
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Visser, P.N.A.M. (author)

A method for validating the calibration parameters of the six accelerometers on board the Gravity field and steady-state Ocean Circulation Explorer (GOCE) from star tracker observations that was originally tested by an end-to-end simulation, has been updated and applied to real data from GOCE. It is shown that the method provides estimates of...

journal article 2017
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van der Spek, J.E. (author), Bakker, M. (author)

The influence of the length of the calibration period and observation frequency on the predictive uncertainty in time series modeling of groundwater dynamics is investigated. Studied series are from deltaic regions with predominantly shallow groundwater tables in a temperate maritime climate where heads vary due to precipitation and...

journal article 2017
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van Schie, M.M.C.H. (author), Honarmand Ebrahimi, K. (author), Hagen, Wilfred R. (author), Hagedoorn, P.L. (author)
Recent developments in microfluidic and nanofluidic technologies have resulted in development of new chip-based microfluidic calorimeters with potential use in different fields. One application would be the accurate high-throughput measurement of enzyme activity. Calorimetry is a generic way to measure activity of enzymes, but unlike...
journal article 2017
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Galatro, L. (author), Spirito, M. (author)

In this paper, we propose a method based on 3-D electromagnetic simulations, for the characteristic impedance extraction of transmission lines employed in TRL calibration, focusing on lines integrated in silicon technologies. The accuracy achieved with TRL calibrations using the proposed characteristic impedance extraction is benchmarked...

journal article 2017
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Lepot, M.J. (author), Aubin, Jean Baptiste (author), Clemens, F.H.L.R. (author), Mašić, Alma (author)

UV/Vis spectrophotometers have been used to monitor water quality since the early 2000s. Calibration of these devices requires sampling campaigns to elaborate relations between recorded spectra and measured concentrations. In order to build robust calibration data sets, several spectra must be recorded per sample. This study compares two...

journal article 2017
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Colson, Abigail (author), Cooke, R.M. (author)

We update the 2008 TU Delft structured expert judgment database with data from 33 professionally contracted Classical Model studies conducted between 2006 and March 2015 to evaluate its performance relative to other expert aggregation models. We briefly review alternative mathematical aggregation schemes, including harmonic weighting, before...

journal article 2017
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Farmani, M. (author), Heusdens, R. (author), Pedersen, M.S. (author), Jensen, J (author)
We consider the problem of determining the relative position of dual-microphone sub-arrays. The proposed solution is mainly developed for binaural hearing aid systems (HASs), where each hearing aid (HA) in the HAS has two microphones at a known distance from each other. However, the proposed algorithm can effortlessly be applied to acoustic...
conference paper 2016
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Campanella, M.C. (author)
How to model and simulate large pedestrian facilities accurately? This dissertation answers this question by analysing current pedestrian models and expanding one. The developed model (Nomad) describes pedestrians as individuals that minimise walking efforts. The model is expanded including behaviours that correspond to activities performed in...
doctoral thesis 2016
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Homulle, H.A.R. (author), Charbon, E.E.E. (author)

We propose an analog-to-digital converter (ADC) architecture, implemented in an FPGA, that is fully reconfigurable and easy to calibrate. This approach allows to alter the design, according to the system requirements, with simple modifications in the firmware. Therefore it can be used in a wide range of operating conditions, including a harsh...

journal article 2016
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Duives, D.C. (author)
To what extent can we model the movements of pedestrians who walk across a large-scale event terrain? This dissertation answers this question by analysing the operational movement dynamics of pedestrians in crowds at several large music and sport events in the Netherlands and extracting the key crowd movement phenomena. A conceptual model and an...
doctoral thesis 2016
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Mouri Sardarabadi, A. (author)
The search for the answer to one of the most fundamental scientific questions, “How was the universe formed?”, requires us to study very weak radio signals from the early universe. In the last eighty years, radio astronomers have been able to use radio frequency observations for significant discoveries such as quasars, super massive Black Holes...
doctoral thesis 2016
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van Daal-Rombouts, P.M.M. (author), Sun, Siao (author), Langeveld, J.G. (author), Bertrand-Krajewski, J.-L. (author), Clemens, F.H.L.R. (author)
Optimisation or real time control (RTC) studies in wastewater systems increasingly require rapid simulations of sewer systems in extensive catchments. To reduce the simulation time calibrated simplified models are applied, with the performance generally based on the goodness of fit of the calibration. In this research the performance of three...
journal article 2016
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van der Kruk, E. (author), den Braver, O. (author), Schwab, A.L. (author), van der Helm, F.C.T. (author), Veeger, H.E.J. (author)

In the current project, we aim to provide speed skaters with real-time feedback on how to improve their skating performance within an individual stroke. The elite skaters and their coaches wish for a system that determines the mechanical power per stroke. The push-off force of the skater is a crucial variable in this power determination. In...

journal article 2016
Searched for: subject:"calibration"
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