Colloid Chemistry (Vold, Marjorie J.; Vold, Robert D.)

Norway , Mental Health and WHO Gunnar Vold

The Vold-Sutherland and Eden Models of Cluster Formation 1

Large clusters or flocs have been grown on the computer using the models introduced by Void and Sutherland and by Eden. Some of the properties of these dusters have been analyzed and compared with the same properties of dusters grown using the diffusion limited growth process of Witten and Sander. For all three models the radius of gyration (Rg) is related to the number of particles in the dust...

Characteristics of the Vold-Kalman order tracking filter

In this paper the filter characteristics of the Vold-Kalman Order Tracking Filter are presented. Both frequency response as well as time response and their time-frequency relationship have been investigated. Some guidelines for optimum choice of filter parameters are presented. The Vold-Kalman filter allows for the high performance simultaneous tracking of orders in systems with multiple indepe...

Understanding the Kalman/Vold-Kalman Order Tracking Filters' Formulation and Behavior

The Kalman and Vold-Kalman order tracking filters have been implemented in commercial software since the early 90's. There are several mathematical formulations of filters that have been implemented by different software vendors. However, there have not been any papers that have been published which sufficiently explain the math behind these filters and discuss the actual implementations of the...

Realization of a Vold-kalman Tracking Filter — a Least Squares Problem

The aim of this work was the implementation of the so-called VoldKalman filter. This filter was introduced by Vold and Leuridan in 1993 [1], it is a heterodyne filter for tracking the sinusoidal components of a noisy signal. The formulation of the Vold-Kalman filter leads to a least squares problem. The great advantage of this time-varying filter is that all sinusoids of a signal can be extract...