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In this paper, is proposed a method to implement in FPGA (Field Programmable Gate Array) circuits different approximation of the sigmoid function. Three previously published piecewise linear and one piecewise second-order approximation are analyzed from point of view of hardware resources utilization, induced errors caused by the approximation function and(More)
From December 1999 to the end of February 2000, 4218 cases of dysentery were reported in Kenema district, southeastern Sierra Leone, by a Médecins Sans Frontières team operating in this region. Shigella dysenteriae serotype 1 was isolated from the early cases. The overall attack rate was 7.5% but higher among children under 5 years (11.2%) compared to the(More)
In November 1999, a Médecins Sans Frontières team based in the southeastern part of Sierra Leone reported an increased number of cases of bloody diarrhoea. Shigella dysenteriae serotype 1 (Sd1) was isolated in the early cases. A total of 4218 cases of dysentery were reported in Kenema district from December, 1999, to March, 2000. The overall attack rate was(More)
Gesture recognition is a domain of grate interest of our days due to the multiple application possibilities, from the spatial or subaquatic robots manipulation, to the sign language used for communication by the peoples with hearing or speech disabilities. This paper shows an application of the artificial neural networks (ANN) implemented in field(More)
This paper presents an in depth study of FPGA implementation of feed-forward neural networks regarding error reduction as a function of number of bits used for weights representation. Xilinx block parameters influence on resources occupied by network and the maximum working frequency is also studied.
This paper presents the results obtained in the implementation of Feed-Forward Artificial Neural Networks (FF-ANN) with one or several layers, used in the development of smart devices that needs learning capability and adaptive behavior. The networks were implemented using ANN specific blocks created by the authors using the System Generator software. The(More)
In this paper authors propose a rapid and new method to design and optimize the electric motor control using field programmable gate array (FPGA). The elaborated designing algorithm takes advantage of the unification of ISE Xilinx digital designing environment with Matlab/Simulink simulation and testing environment, through system generator toolbox. This(More)
The current paper is meant to display a development procedure for a Simulink/Matlab library with parameterized components which can be implemented in FPGA circuits. The usage of the library components shall ease and shorten the time for design and hardware implementation of a loop control for direct current motors. The System Generator Toolbox is to be used(More)
In this paper we propose an algorithm, implemented with VHDL language in RTL design, capable of reorganizing the f1ip-flops from within a circuit in order to reduce the power consumption through optimal c10ck distribution. Practically in the end, starting from this algoritbm, we will model the clock bebavior in a sequential circuit. Experimental results(More)
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