Searched for: subject%3A%22process%22
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Berdenis van Berlekom, H.A. (author)
It is the task and target of River Engineering as a profession to provide all the tools for arriving at an optimum utilization of the potential resources, optimum in the sense of promoting the beneficial characteristics of the river and eliminating or at least checking the adverse qualities. To strive for this aim, there must be a scientific...
report 1969
document
Konstantinou, T. (author), Knaack, U. (author)
Refurbishing the existing building stock is an acknowledged issue in the building industry. Even though awareness has been raised, the design phase of refurbishment projects is often problematic. The decisions taken in the early stages of the design determine the final result; however, the assessment of the environmental performance only happens...
journal article
document
Dorrestijn, J. (author), Crommelin, D.T. (author), Siebesma, A.P. (author), Jonker, H.J.J. (author), Jakob, C. (author)
Observational data of rainfall from a rain radar in Darwin, Australia, are combined with data defining the large-scale dynamic and thermodynamic state of the atmosphere around Darwin to develop a multicloud model based on a stochastic method using conditional Markov chains. The authors assign the radar data to clear sky, moderate congestus,...
journal article
document
Maiwald, K. (author)
report 1972
document
Hartman, A. (author)
Tests on samples anodized in a tartrate solution indicated that porefree thin oxide films prevent almost all light stimulated electron emission. Probably "pores" are requisite for emission. The c.p. and emission as function of the pickling time in chromic-sulfuric acid solution could be explained qualitatively. The micro etch pit structure with...
report 1973
document
van-Herk, A. (author), Wesseling, P. (author)
conference paper 1974
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Rees, A.J. van (author)
report 1974
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Noback, R. (author)
The Power Spectral Density method and the Statistical Discrete Gust Method to calculate aircraft design loads due to atmospheric turbulence are compared qualitatively and quantitatively on the basis of the load exceedance curves for certain aircraft models. It is shown that both methods are related to each other, giving the same results for...
report 1975
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Noback, R. (author)
In this report a method is described to calculate the load exceedance curve for a linear system having a finite, modulated Gaussian process as input. The derivation is based on the use of ensemble averages, defined as the expected values at a certain point of time. The equations can be used for any airplane-transfer function for which the Power...
report 1976
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Traas, C.R. (author)
The report reviews a number of digital filtering methods and gives examples of their application. The methods include batch processing methods and rec\irsive methods, not only in the classical formulations but also in square-root formulations. The latter formulations have the purpose to prevent certain numerical inconveniences. Much attention is...
report 1976
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Noback, R. (author)
In this report a model for atmospheric turbulence is proposed. It is assumed that atmospheric turbulence appears in patches and that within the patches the turbulence can be described as a modulated Gaussian process. Statistical properties of this model and of atmospheric turbulence are compared. Using data from various sources a probability...
report 1976
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Verhoef, W. (author)
Measurement of an object's reflectance spectrum can provide information on its nature and qualities. However, one should thoroughly take into account the fact that in general the reflectance spectrum does not only depend on the object itself, but also on the parameters defining the measurement conditions, like the spectral and spatial...
report 1977
document
Noback, R. (author)
In this report it is assumed that atmospheric turbulence appears in patches and that within the patches the turbulence can be described.as a modulated Gaussian process. The patch lengths have a certain probability density function. Load exceedance curves and design loads for various aircraft models for this turbulence model are compared with...
report 1978
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van Woerkom, P.T.L.M. (author), Traas, C.R. (author)
The ESA starmapper is an optical-electronic instrument with an array of photo-sensitive slits, to "be strapped down to spinning spacecraft. Recorded times of passage of known stars over these slits, together with mathematical models for spacecraft dynamics and starmapper instrument, provide the basis for recursive estimation of the spacecraft...
report 1978
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van Woerkom, P.Th.L.M. (author), Sonnenschein, F.J. (author)
The study deals with the rotational motion of a spin-stabilized spacecraft equipped with a V-slit sun sensor and the X-slit ESA starmapper. Assuming complete absence of an a priori attitude estimate, it is required to produce a rough estimate of the spacecraft attitude motion. It was assumed that sensor misalignments, external torques and...
report 1979
document
van Woerkom, P.Th.L.M. (author), Sonnenschein, F.J. (author)
The study deals with the rotational motion of a spin-stabilized spacecraft equipped with a V-slit sun sensor and the X-slit ESA starmapper. Assuming complete absence of an a priori attitude estimate, it is required to produce a rough estimate of the spacecraft attitude motion. It was assumed that sensor misalignments, external torques and...
report 1979
document
Van den Berg, P.J. (author), De Jong, W.A. (author)
book 1979
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Moek, G. (author)
This report constitutes the deposit of a study of literature on martingales and estimation theory. Some experimental work concerning the efficiency of an estimation algorithm based on martingales is also described. The investigation has been guided by the intent to investigate martingales in relation to the Kalman and Kalman-Bucy filters and to...
report 1980
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Pool, A. (author), Simons, J.L. (author), Wensink, G.J.H. (author), Willekens, A.J.L. (author)
The STALINS method for measuring take-off and landing trajectories is briefly described and results of flight tests made in 1978-80 are discussed. The method now meets the requirements to which it was designed, and a few improvements in the hardware and software are being finalized. The method is expected to be ready for operational use in the...
report 1980
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Blom, H.A.P. (author)
The problem considered is filtering for Gaussian observations of linear differential systems that are driven by both Wiener processes and marked Poisson point processes. Well-known representations of the MMSE-filter for such a Markov jump-diffusion are a differential for the evolution of its conditional density or differentials for all its...
report 1982
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