Introduction. This article presents the development of mathematical models related to effect initial content dry matter, yeast, and yeast energizer on fermentation rate, alcohol content, matter in finished product – mead.
 Study objects methods. The were developed by using response surface methodology (RSM). contents tested concentration ranges 150–600 mg/L, 16.3–24.4%, 140–500 respectivel...

: Unwanted water production from oil and gas reservoirs is a serious problem for producers. Preformed particle gel (PPG) treatment is a benefit approach to control excess water production. Swelling percentage of PPG samples in saline water is a key factor affecting the efficiency of the water conformance process. In this study, an efficient series of PPGs were synthesized and their swelling beh...

Abstract Improving the dynamic properties and reducing vibration levels is extremely important for design of many engineering structures. In this paper, we develop a topology optimization program based on parallel computing with help PETSc Portable Extension Toolkit Scientific Computing MPI communication protocol. The SIMP model used as model, sensitivity analysis schemes compliance displacemen...

A frequency-designed fractional delay FIR structure, which is suitable for software radio applications, is presented. The design method is based on frequency optimization of a combination of modified Farrow and mutirate structures. As a result the optimization frequency range is made only in half of desired total bandwidth. According to the obtained results the proposed fractional delay structu...

Aiming the problem of determining initial value of nonequidistant new information GM(1,1) model, researching modeling mechanism of non-equidistant new information GM(1,1) model which taking the newest component of original data as the initial value of response function of grey differential equation, the cause of the problem was found out, a new method for initiating value of non-equidistant new...