Adelaide Research and Scholarship
http://digital.library.adelaide.edu.au:80/dspace
The DSpace digital repository system captures, stores, indexes, preserves, and distributes digital research material.2014-09-16T00:13:35ZPerformance analysis of dynamic multitasking imprecise computation system
http://hdl.handle.net/2440/85338
Title: Performance analysis of dynamic multitasking imprecise computation system
Author: Lim, C.C.; Zhao, W.
Abstract: The scheduling of tasks in dynamic multitasking computer systems using imprecise partial computations is studied. In this system, tasks arrive randomly during run-time, and they are to be processed as quickly as possible. The task is modelled in such a way that each task has two parts of computation: a mandatory part, and an optional part. The tasks are scheduled such that: if the total number of tasks in the system is no more than M (a system parameter), the tasks are executed fully to produce precise results. When the total number of tasks exceeds M, then only the mandatory parts of the tasks are executed. To study this dynamic imprecise computation system, the authors propose three performance metrics to measure responsiveness and quality of computation of tasks. Queueing methods are used to analyse the scheduling problem, and performance metrics are computed numerically. The performance of the scheme is assessed, and found to be effective in keeping the mean task waiting time at a low value when the system is heavily loaded or overloaded.1990-12-31T13:30:00ZOptimal insulin infusion control via a mathematical blood glucoregulatory model with fuzzy parameters
http://hdl.handle.net/2440/85337
Title: Optimal insulin infusion control via a mathematical blood glucoregulatory model with fuzzy parameters
Author: Lim, C.C.; Teo, K.L.
Abstract: In this paper, we consider a blood glucose-insulin model subject to parameter variation. Our aim is to use a mathematical optimization technique lo derive insulin infusion programs for the regulation of the blood glucose level in the case of worst possible parameter values. Numerical computation and simulation studies are carried out to verify the performance of the method on regulation of initially high blood glucose level while fasting and of blood glucose level after a meal prior to which blood glucose is at its rest level.1990-12-31T13:30:00ZMean-square stability of stochastic differential time-lag systems
http://hdl.handle.net/2440/85336
Title: Mean-square stability of stochastic differential time-lag systems
Author: Lim, C.C.; Teo, K.L.
Abstract: Two sets of sufficient conditions for the mean-square asymptotic stability of the equilibrium state of linear differential time-lag systems with non-stationary random coefficients are derived. Each of the sets of sufficient conditions is then shown to be equivalent to a corresponding unconstrained optimization problem. Hence, it can readily be solved by standard efficient optimization techniques. The usual trial-and-error method of finding the required parameters to satisfy the stability conditions can now be avoided.1988-12-31T13:30:00ZA stochastic optimal control approach to a mathematical drug administration model
http://hdl.handle.net/2440/85335
Title: A stochastic optimal control approach to a mathematical drug administration model
Author: Lim, C.C.; Teo, K.L.1988-12-31T13:30:00Z