As a major indicator of lake eutrophication that is harmful to human health, the chlorophyll-a concentration (Chl-a) is often estimated using remote sensing, and one method often used is the spectral derivative algorithm. Direct derivative processing may magnify the noise, thus making spectral smoothing necessary. This study aims to use spectral smoothing as a pretreatment and to test the appli...

In this paper, an optimal longitudinal slip ratio system for real-time identification of electric vehicle (EV) with motored wheels is proposed based on the adhesion between tire and road surface. First and foremost, the optimal longitudinal slip rate torque control can be identified in real time by calculating the derivative and slip rate of the adhesion coefficient. Secondly, the vehicle speed...

Abstract The article first uses the fractional derivative to define a new bounded variation function space. This method constructs corresponding electronic information image model denoising mask by setting smaller integration order. experimental results show that algorithm based on can not only improve signal-to-noise ratio of compared with traditional method, but also better retain details edg...

Two methods for the simultaneous estimation of atenolol and hydrochlorothiazide in combined tablet dosage form have been developed. The first method is the Q-analysis method, based on absorbance ratio at two selected wave lengths 232.0nm (Iso-absorptive point) and 270.0nm (λmax of hydrochlorothiazide). The second method is the first order derivative spectroscopy using 214.0nm (zero cross for at...

A fast spectrophotometric method has been developed for bacitracin identification and determination after condensation reaction with dabsyl chloride. In addition, determination of dye stability of sulfonamide derivative and identification of the molar ratio of reagents was done at various time-points. The developed method has a good linearity with very broad spectrum, correlation coefficient of...

in this paper, we present a new iterative method with order of convergence eighth for solving nonlinear equations. periteration this method requires three evaluations of the function and one evaluation of its first derivative. a general error analysis providing the eighth order of convergence is given. several numerical examples are given to illustrate the efficiency and performance of the new ...

We introduce a novel method to automatically evaluate Xray computed tomography (CT) images for the purpose of detecting material defects by evaluating the significance of features extracted by first order derivative filters. We determine the noise characteristics of an image using robust estimation methods and compute the noise of the filtered image via error propagation. The significance of th...