Reports on a study which addressed meal selection in catering outlets (e.g. school or workplace canteens) from the perspective of the caterer and consumer. Asks what foods are supplied and why these are chosen. Questi...
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The authors describe a graphical system developed for researchers in materials science for extracting information from data obtained by atomic force microscopy. In particular, they consider the problem of computing su...
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ISBN:
(纸本)9780897918640
The authors describe a graphical system developed for researchers in materials science for extracting information from data obtained by atomic force microscopy. In particular, they consider the problem of computing surface orientations from data obtained from ceramic materials. The visualization problems they consider in designing this system include finding useful mechanisms for the researcher to interact with the data, presenting results in forms familiar to the scientist, and enhancing traditional display techniques.
We describe a method for modeling aggregation in a flowing fluid. In the model, aggregation proceeds by the accumulation of a “nutrient.” The nutrient is modeled using a lattice Boltzmann model of transport. The agg...
We describe a method for modeling aggregation in a flowing fluid. In the model, aggregation proceeds by the accumulation of a “nutrient.” The nutrient is modeled using a lattice Boltzmann model of transport. The aggregate absorbs the nutrient, and the amount absorbed determines the local growth probability. This model contains some of the essential features of growth of stony corals. We find that the morphology of the aggregates changes drastically as we increase the Péclet number from a regime where nutrient transport is diffusion controlled to a regime where hydrodynamic transport dominates. This is in qualitative agreement with the morphogenesis of stony corals.
A low gain design for linear discrete-time systems subject to input saturation was recently developed in (Lin and Saberi 1995a, Lin et al. 1995a, Mantri et al. 1995) to solve both semi-global stabilization and semi-gl...
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A low gain design for linear discrete-time systems subject to input saturation was recently developed in (Lin and Saberi 1995a, Lin et al. 1995a, Mantri et al. 1995) to solve both semi-global stabilization and semi-global output regulation problems. This paper proposes an improvement to the low gain design and determines controllers with the new design that achieve semi-global output regulation. The improvement is reflected in better utilization of available control capacity and consequently better closed-loop performance.
Simulation of air infiltration and ventilation, and heat transfer processes of buildings are combined in a building simulation program called BUS (version 3.2). The program applies and includes an effective sparse mat...
Simulation of air infiltration and ventilation, and heat transfer processes of buildings are combined in a building simulation program called BUS (version 3.2). The program applies and includes an effective sparse matrix solution method for a linear set of equations. A network assumption is adopted for both air flow and thermal simulation. An iterative method, based on the SIMPLE algorithm, is used for air flow simulation, and the humped capacitance method is selected for thermal simulation. This building simulation program BUS includes mass balance, momentum, and heat balance equations. This makes it possible to take into consideration the interaction between ventilation and heat transfer processes, obtain more reliable simulation results than previously, and simulate time-dependent processes.
Although the processing power of uniprocessor systems is significantly increasing every year, there is a never ending quest for peak performance. The so called grand challenges in computing require more computing powe...
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Let the input to a computation problem be split between two processors connected by a communication link; and let an interactive protocol /spl pi/ be known, by which on any input, the processors can solve the problem ...
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Let the input to a computation problem be split between two processors connected by a communication link; and let an interactive protocol /spl pi/ be known, by which on any input, the processors can solve the problem using no more than T transmissions of bits between them, provided the channel is noiseless. We study the following question: if in fact there is some noise on the channel, what is the effect upon the number of transmissions needed in order to solve the communication problem reliably?.
We report on two types of results. The first is a study of the rate of decay of information carried by a signal which is being propagated over a noisy channel. The second is a series of lower bounds on the depth, size...
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We report on two types of results. The first is a study of the rate of decay of information carried by a signal which is being propagated over a noisy channel. The second is a series of lower bounds on the depth, size, and component reliability of noisy logic circuits which are required to compute some function reliably. The arguments used for the circuit results are information-theoretic, and in particular, the signal decay result is essential to the depth lower bound. Our first result can be viewed as a quantified version of the data processing lemma, for the case of Boolean random variables.
We show that any distributed protocol which runs on a noiseless network in time T, can be simulated on an identical noisy network with a slow-down factor proportional to log(d+1), where d is the maximum degree in the ...
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We show that any distributed protocol which runs on a noiseless network in time T, can be simulated on an identical noisy network with a slow-down factor proportional to log(d+1), where d is the maximum degree in the network, and with exponentially small probability of error. On every channel of our network we implement communications using tree codes.
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