Thermal evaporation technique was used to deposit (Ga0.1In0.9)2Se3 thin films. The optical transmission spectra of (Ga0.1In0.9)2Se3 thin film were studied in the temperature range 77-300 K. Temperature behaviour of the Urbach absorption edge as well as the temperature dependencies of the energy pseudogap and Urbach energy were investigated. The influence of different types of disordering on the optical properties of (Ga0.1In0.9)2Se3 thin film was discussed. Optical parameters of (Ga0.1In0.9)2Se3 thin film and single crystal were compared.
In the article, to protect the garden from insect pests, theoretical studies have been carried out on the distribution of the electrical tension of video pulses inside insects. As the source of electromagnetic impulses, the electric current density is chosen, localized in the environment surrounding the biological object. For a given source of electromagnetic impulses, it is required to determine the electromagnetic field both within the biological object and in the outer space. These fields must satisfy the system of Maxwell's equations. To convert the non-stationary problem to the problem in the frequency domain, the desired electromagnetic fields inside and outside the biological object are represented as Fourier series. As a result of the transformations, the initial non-stationary problem of the interaction of a sequence of electromagnetic impulses with a biological object is reduced to the problem of diffraction of a harmonic electromagnetic field by a dielectric cylindrical scattered simulating a biological object. A direct solution of this problem is possible only by numerical methods. To simplify the problem, an explicit formula was obtained for the field averaged over the volume occupied by the biological object by the method of integral equations. The basis of integral equations is the representation of the electromagnetic field through vector potential functions and integral formulas of the theory of vector fields. As a result of the transformations, integral equations were obtained for the electric field strength inside and outside the biological object. The obtained expressions make it possible to determine the biotropic parameters of an impulse electromagnetic field for the destruction of insect pests in orchards. Creation on this basis of more effective mobile electrophysical installations allows to keep ecologically pure fruits and berries.
This work considers the issue of optimizing the water discharge monitoring network in order to increase the accuracy of computing a river water balance, thereby optimizing the water use within such water basin based on the sustainable development and river basin integrated management principles. The authors hereof have developed the multi-criteria method for ranking the river water discharge monitoring stations; such method is to be applied to determine the priorities of their location, under the limited funding conditions, based on a systemic analysis of the water (water management) balance components with due regard to the river network topology and the specifics of water use within such network. The method offered herein differs from the existing methods inasmuch as it discriminates between the phase of the evaluation of the weight of the ranking criteria and the phases of data processing related to the potential water flow gauging stations according to such criteria, thus ensuring complete automation of such data processing and high speed and efficiency of such method. The functionability of the method has been demonstrated in practice. The method is an omni-purpose tool applicable also for optimization of other types of monitoring networks.
KEYWORDS: Information technology, Mathematical modeling, Digital micromirror devices, RGB color model, Digital photography, Cardiovascular system, Blood pressure, Heart, Systems modeling, Animal model studies
The paper aims to study the criteria of harmony by example of protective coloration for antelopes and dynamics of the parameters for human cardiovascular system at different stages of obesity. The criteria of harmony reflecting the adaptive mechanisms of the biological objects under consideration are obtained. In the case of antelopes (Taurotragus oryx), criteria of harmony chosen were colorimetric parameters of protective coloration, subjected to change due to the domestication of these animals. In the case of the human cardiovascular system, the parameters of heart rate, systolic blood pressure and diastolic blood pressure were selected. The results of the simulation show that the increase in body weight, due to hypodynamia in women, leads to a deterioration of the harmony of the dynamics of the cardiovascular system. As a criterion of harmony, the variety of combinations of values observed in the cycle of changes of these parameters built in the result of modeling is used. A similar dependence takes place in the example of protective coloration of antelopes. As a criterion of harmony, in this case, a variety of combinations of colorimetric parameters of the protective color of antelopes is used. The results of mathematical modeling obtained in the work allow us to propose a new approach to finding a universal criterion of harmony of living systems related to biodiversity and adaptation to living conditions.
Production control system, enabling to distribute resources or loads between subsystems quickly and optimally is suggested. The methodology of optimal aggregation allows us to replace the multidimensional optimization problem by a system of one-dimensional optimization problems, which removes the dimensionality problem. The solution of optimization problem is the optimal equivalent function of the production system. A technique of parametrization of this function is developed. Optimum control is represented as a function of resources prices, production products, parameters of production functions. A decision support system has been developed and software modules have been tested.
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