- Electrical and Electronic Engineering - Research Publications
Electrical and Electronic Engineering - Research Publications
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ItemNo Preview AvailableGranger causality from quantized measurementsAhmadi, S ; Nair, GN ; Weyer, E (Elsevier BV, 2022-08-01)
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ItemNo Preview AvailableGranger causality of Gaussian signals from noisy or filtered measurementsAhmadi, S ; Nair, GN ; Weyer, E (Elsevier BV, 2020-01-01)
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ItemGranger Causality of Gaussian Signals from Quantized MeasurementsAhmadi, S ; Nair, GN ; Weyer, E (IEEE, 2020-03-12)An approach is proposed for inferring Granger causality between jointly stationary, Gaussian signals from quantized data. First, a necessary and sufficient rank criterion for the equality of two conditional Gaussian distributions is proved. Assuming a partial finite-order Markov property, sufficient conditions are then derived under which Granger causality between them can be reliably inferred from the second order moments of the quantized processes. This approach does not require the statistics of the underlying Gaussian signals to be estimated, or a system model to be identified.
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ItemSystems engineering for irrigation systems: Successes and challengesMAREELS, I ; WEYER, E ; OOI, S ; CANTONI, M ; LI, Y ; NAIR, GN (Elsevier, 2005)In Australia, gravity fed irrigation systems are critical infrastructure essential to agricultural production and export. By supplementing these large scale civil engineering systems with an appropriate information infrastructure, sensors, actuators and a communication network it is feasible to use systems engineering ideas to improve the exploitation of the irrigation system. This paper reports how classical ideas from system identification and control can be used to automate irrigation systems to deliver a near on-demand water supply with vastly improved overall distribution efficiency.