Proceedings of the 5th International Conference on Inverse Problems in Engineering: Theory and Practice, Cambridge, UK, 11-15th July 2005 PRACTICAL APPLICATION OF INVERSE PROBLEM SOLUTION ALGORITHMS FOR WATER POLLUTION MEASUREMENTS USING ION SELECTIVE TRANSISTORS M. JANICKI and A. NAPIERALSKI
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چکیده
The paper deals with an inverse problem of ion mixture composition estimation using electronic sensors based on conventional MOS transistors. The device sensitivity to various ions is obtained by replacing the traditional transistor gate structure by special polymer membranes, which are sensitive to the ions in an electrolyte flowing over the gate. Unfortunately, the membrane selectivity is limited and ions other than the main one also influence the measurements, hence rendering the problem ill-conditioned. Thus some special methods must be employed so as to be able to obtain robust ion activity estimates from noisy sensor measurements. In this paper, for given membrane selectivity values, the ion mixture composition is estimated employing the sequential Beck’s function specification algorithm. This algorithm has been implemented also in a practical data processing system as a digital filter.
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Proceedings of the 5th International Conference on Inverse Problems in Engineering: Theory and Prac- tice, Cambridge, UK, 11-15th July 2005 AN ITERATIVE METHOD FOR RECONSTRUCTION OF TEMPERATURE
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تاریخ انتشار 2005