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Digital correlation techniques are used in photon correlation spectroscopy (PCS) experiments to gain information about the diffusion coefficient and thereby the size and distribution of submicron particle structures in fluid media. This paper presents a photon correlation system implemented by high performance FPGA (Field Programmable Gate Array). Owning to the digital nature of photon counting, correlators...
Design of controllers for decentralised have been considered by many researchers who have assumed that implementation of these controllers would not provide any additional problems. In this paper a number of different implementation configurations are considered. It is shown that different closed-loop dynamics may result, based on sampling rates, connection topologies and communication traffic. An...
It is generally recognized that asynchronous operation of logic networks offers specific advantages over synchronous operation controlled by a central clock when the network is subject to large or widely varying inter-module propagation delays. In this paper we characterize several previously described techniques for achieving asynchronous operation by a single model. Essential to the model is the...
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