This paper studies the performance of the recursive least squares (RLS) algorithm in the presence of a general chirped signal and additive white noise. The chirped signal, which is a moving average (MA) signal deterministically shifted in frequency at rate , can be used to model a frequency shift in a received signal. General expressions for the optimum Wiener–Hopf coefficients, one-step recove...

in this research the experimental and theoretical studies on different enhanced oil recovery (eor) techniques, i.e. water flooding (wf), gas injection (gi) and water alternating gas process (wag) were performed on specimens taken from an iranian carbonate offshore reservoir at the reservoir condition. the experimental results for each specified techniques were compared with the corresponding re...

Effect of flow velocity and cell-pair thickness in electrodialysis (ED) is studied. The production cost includes pump energy, while the size system considered as an output variable. performance ED depends on three categories process parameters namely water quality data, stack configuration characteristic inside stack. design complex due to interrelation among variables so calculation chronology...

objective: to evaluate the current scientific evidence for the applicability, safety and effectiveness of pathways of enhanced recovery after emergency surgery (eras). methods: we undertook a search using pubmed and cochrane databases for eras protocols in emergency cases. the search generated 65 titles; after eliminating the papers not meeting search criteria, we selected 4 cohort studies and ...

A phytase was isolated and partially purified from the pollen of Lilium longiflorum Thumb. Optimum activity was at pH 8.0. The phytase was activated by Ca(2+) and Sr(2+) but not by the other divalent cations tested. Activity was inhibited by ethylenediaminetetraacetate. The phytase had a temperature optimum of 55 to 60 degrees C and an activation energy of about 12,700 calories/mole. Extraction...

This study deals with the removal of cadmium (II) from cadmium plating wast water by chemical precipitation in shape of white crystalline precipitate, using oxalic acid o,5M as chemical reagent.It was studied the influence of pH, dose of reagent, temperature and also the influenceof initial concentration of cadmium cation.The efficiency of process was expressed in percentage for all the experim...

The optimum conditions were determined for the production and detection of staphylococcal elastase from Staphylococcus epidermidis. Optimum production and recovery took place when the dialysis membrane technique was utilized with brain heart infusion agar incubated for 44 h under 15% CO2 and harvested in physiological saline. Near-optimal production took place by 28 h, and this was found more u...

nanosized hydroxyapatite and reversed-phase high performance liquid chromatography (RP-HPLC) for the simultaneous determination of organic acids (oxalic, malic, malonic, citric, and fumaric) and nitrate in xylem saps of the hyperaccumulator Alyssum murale is presented in this study. The optimum experimental conditions for the separation and determination of organic acids and nitrate are studied...

Geochemical equilibrium speciation modeling was used to determine optimum conditions for precipitation of magnesium ammonium phosphate, or struvite, for the recovery of nutrients from anaerobically digested wastes. Despite a wide range of pH values with the potential to precipitate struvite, the optimum pH was determined to be 9.0. Bench experiments conducted on effluent from an anaerobic seque...