A three-layer artificial neural network (ANN) model was developed to predict the remained DO (deoxygenation) in water after DO removal with an enzymatic granular biocatalyst (GB), based on the experimental data obtained in a laboratory stirring batch study. The effects of operational parameters such as initial pH, initial glucose concentration and temperature on DO removal were investigated. On...

Sigmoid volvulus is an unusual but an important cause of intestinal obstruction. It is associated with a high mortality especially when there is delayed diagnosis or when there is presence of gangrenous changes. The incidence of sigmoid volvulus is reducing in western world. We hereby report an interesting case of intestinal obstruction due to gangrenous sigmoid volvulus. Patient was fortunate ...

It is the severe form of achalasia that is characterised by massive dilatation and tortuosity of the oesophagus. It is seen in long standing achalasia where the dilated upper segment of the oesophagus sags down below the level of the narrowed lower segment causing mechanical obstruction. Whereas Heller’s cardiomyotomy is considered to be the operation of choice in simple achalasia, it is regard...

A class of Ruscheweyh – type harmonic functions associated with both sigmoid function and probabilities the generalized distribution series is defined using differential operators. We then establish properties such as coefficient estimate, distortion theorem, extreme point, convex combination condition. Several applications our results are obtained corollaries by varying various parameters invo...

In our present study, two subclasses of starlike functions which are symmetric about the origin considered. These classes defined with use sigmoid function and trigonometric function, respectively. We estimate first four initial logarithmic coefficients, Zalcman functional, Fekete–Szegö bounds second-order Hankel determinants coefficients for class Sseg* improve obtained existing determinant se...

The problem of quadrotor attitude and position control is considered in the presence generally lumped disturbances: external disturbances model uncertainty. improved active disturbance rejection controller (ADRC) for trajectory tracking proposed compensating disturbances. Firstly, sigmoid differentiator (ISTD), combining Sigmoid function sliding mode terminal attractor proposed, which can accel...

a back propagation artificial neural network (bpann) is a well-known learning algorithmpredicated on a gradient descent method that minimizes the square error involving the networkoutput and the goal of output values. in this study, 261 gps/leveling and 8869 gravity intensityvalues of iran were selected, then the geoid with three methods “ellipsoidal stokes integral”,“bpann”, and “collocation” ...

The water quality of the Karaj River was studied through collecting 2137 experimental data set gained by 20 sampling stations. The data included different parameters such as T (temperature), pH, NTU (turbidity), hardness, TDS (total dissolved solids), EC (electrical conductivity) and basic anion, cation concentrations. In this study a multi-layer perceptron artificial neural network model was d...

OBJECTIVES To show that mechanical compression of sigmoid sinus is effective for treatment of pulsatile tinnitus caused by sigmoid sinus enlargement, and to evaluate the relationship between the compression degree of sigmoid sinus and the tinnitus symptom relief using magnetic resonance angiography. METHODS Medical records of twenty-four patients who were diagnosed with venous tinnitus caused...

The purpose of this article is to introduce a new subclass analytic and bi-univalent functions, in associated with sigmoid function investigate the upper bounds for |a2| |a3|, where a2, a3 are initial Taylor-Maclaurin coefficients. Further we obtain Fekete-Szego inequalities class sigma. We also give several illustrative examples functionclass which here.