A decentralized failure detection and isolation (FDI) methodology, which is robust with respect to model uncertainties and noise, is presented. Redundancy metrics are developed, and optimization problems are posed for the choices of robust parity relations. Closed-form solutions for some special failure cases are given. Connections are drawn with other disciplines, and the use of the metrics to...

A new procedure for the determination of chromium species in polluted environmental samples by flame atomic absorption spectrometry was developed in this work. A new material containing 1,5-diphenylcarbazone included in a polymeric matrix was prepared and employed as a solid-phase extraction material for selective separation of Cr(III) ions under dynamic conditions. Chromium(III) ions were reta...

The modification of silica gel, from the waste bricks burning process, with diphenylcarbazone has been done. gel modified by (Si-DPZon) was obtained boiling ash NaOH solution to create sodium silicate and neutralized HCl get then physically ligand. study included determination adsorbent functional groups spectrophotometer IR, surface acidity acid-base titration method, specific area absorption ...