Energy-efficient control of pump units based on neural-network parameter observer

An observer based on an artificial neural network was designed. The observer determines the pumping unit performance depending on the operating point. Determination is based on the measured technological coordinates of the system and the pressure of the turbomechanism. Three neural networks were designed for three types of the productivity observer. The developed observer was investigated by the simulation method within different variations of disturbing actions, such as hydraulic resistance of the hydraulic system and geodetic pressure. A comparative analysis of three types of the productivity observer, built with using the pressure and different signals of the system with arbitrary change of hydraulic resistance was given. By the use of the pump unit efficiency observer, in addition to the results presented earlier, the efficiency of the productivity observer, which built with using different sensors, in water supply systems with two series-connected pump units, operating for filling the large tank, is researched. In the water supply system one pump speed is regulated, the other is unregulated. References 14, figures 5

HYGIENIC VALUE OF VITAMIN D DEFICIENCY IN IRKUTSK REGION AND WAYS OF ITS PREVENTION

The status of vitamin D in the population of Irkutsk region has been determined by the contents of 25(OH)D3 in blood serum of268 people of different age. The highest rates were found in children - 37,78 ± 1,74 ng/ml. In men the level of activity of 25(OH)D3 was equal to 24,64 ± 2,33 ng/ml, in women up to 70years - 21,22 ± 0,85, older than 70 years -15,13 ± 2,24 ng/ml. The lowest rates are found in children with celiac disease -13,43 ± 2,14. More than 60 % of the population suffer from vitamin D deficiency. Yet wide-scale preventive measures are not possible due to limited range offortified food in the trade network

Appropriate prevention of vitamin D deficiency in the population of the Irkutsk region

Purpose of the study. To determine the influence of climatic and geographical factors of the Irkutsk region on the risk of hypovitaminosis D in children and adults. Patients and methods. The contents of 25(OH)D-3 in the blood of children and adults (3261 samples) were evaluated. The materials were obtained in the Diagnostic Center of the region and the InVitro laboratory. Results of monitoring of ultraviolet radiation and precipitation in the Irkutsk region for 2014-2015 were analyzed according to ground and satellite measurements. Results. The Irkutsk region is in the zone of ultraviolet insufficiency during the period from September-October to March-May. The status of the metabolite of vitamin D - 25(oH)D3 in the population of the region is low, especially in adolescents and people older than 70 years. 68 % of children have vitamin D deficiency. Activity of 25(oH)D3 depends on meteorological factors, especially the level of precipitation and the intake of vitamin D. For each geographical area of the region, time intervals were calculated for the formation of vitamin D in the skin under the influence of ultraviolet radiation and time intervals for the intake of vitamin D preparations. The exposure time in the sun was calculated for the formation of vitamin D for individuals with different skin phototypes, depending on the degree of its openness

Effect of histamine on lipid composition of rat bile

To investigate the effect of histamine (8 mkg/kg, i/v) on the concentration of lipids in the rats bile. Using the method of thin layer chromatography concentrations of phospholipids, cholesterol and its esters, free fatty acids, triglycerides were determined in the rats bile collected in acute experiments (anesthesia, sodium thiopental, 50 mg/kg). The results were calculated using Statistica 7.0; p<0,05. Histamine increased concentration of phospholipids, cholesterol, its esters and reduced content of free fatty acids and triglycerides in the rats bile. Probably, histamine, acting on transport lipid components in bile effect on its physical and chemical properties and the maintenance of cholesterol in mixed bile micelles. Histamine affects the metabolic conversion and transport of lipids in the liver cells, causing the increase in the concentration of phospholipids, cholesterol and its esters in bile and decrease it in the content of free fatty acids and triglycerides

Soil monitoring using remote-sensed data

Problems of soil monitoring of the ground based on the analysis of polyzonal satellite images and mobile multispectral touch system information are considered. The technology of digital map creation of organic substances spatial distribution in ground is offered

Optimization of the width of the transportation corridor of tractor trains for agricultural purpose

The main works related to the production and transportation of crop production take place in the Amur region in conditions when the surface of the movement has a weak carrying capacity, which imposes additional requirements on transport units to increase their traction-chain properties.So the issue of exporting crop products from the fields is important and relevant both for peasant farms (PF) and for private farms. The use of multi-link tractor trains (MTU) in the region is limited by a significant deterrent, such as the increase in the width of the transport corridor in turns. Why the issue of increasing the efficiency of the ICC should be considered both in the direction of increasing traction-chain properties, and at the same time optimizing the width of the transport corridor when it moves. The proposed article provides theoretical, experimental research and experience with the use of the designer and scientific novelty, designed to enhance traction-clutch properties and reduce the width of the MTU corridor in an arbitrary turn

Bile lipids in rats under chronic social stress

Our experiments studied changes in lipid compound of bile of non-purebred male rats under the condition of social stress while the preparation “Korvitin” was used against the stress. Using the method of thin-layer chromatography, we determined the concentrations of phospholipids, cholesterol and its esters, free fatty acids and triglycerides in the animals’ bile, which was obtained through vivesection a day and a month after the rats were first subjected to chronic social stress (model of social defeat), and also in the bile of the animals which were treated intragastrically with “Korvitin” against the stress (1 mg/kg, 7 days). In the bile of the male rats which experienced chronic social stress the concentration of free cholesterol decreased and the content of its esters increased both immediately after the initiation of stress and after a month of exposure to stress. The concentration of free fatty acids in the bile decreased after modeling chronic social stress, but increased in liver secretion, taken a month after the animals had first experienced stress. In the bile of male rats immediately after the procedure of exposing the animals to stress, the content of phospholipids decreased. Using “Korvitin” during the modeling of social stress caused decrease in the content of phospholipids in the rats’ bile and caused significant increase in the concentration of free fatty acids, triglycerides and cholesterol esters in the liver secretion. The study found significant changes in the concentration of lipids in the bile and in their distribution in the organism of male rats under the conditions of experimentally induced chronic stress. The effect of stress on the bile of rats requires further study for determining its pathogenic role

2015 KJ19

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