Nowadays Unmanned Aerial Vehicles (UAVs) pose an increasing threat to public areas such as parks, schools, hospitals and official buildings. Different methods of dealing with UAV detection are developing more and more actively. This paper primarily focuses on two key aims: the first aim is to perform a multi-label classification system and the second aim is to develop Stacked Bidirectional Long Short-Term Memory (LSTM) with two hidden layers to categorize multiple UAVs sounds. Frame-wise spectral-domain features are applied as inputs of the proposed system. Overall, the results of the study show that the sound of UAVs can be classified into multiple labels. This study has been one of the first attempts to thoroughly examine Stacked Bidirectional LSTM for UAV sound classification task.

In this scientific research work, the problem of studying the process of removing water – containing iron solutions with an Etro-04 device based on high-frequency corona discharge is considered. In the research work, a special Etro – 04 ozonator device was developed for the oxidation of heavy metals, i.e. chemical pollutants contained in water. Work on testing the device was carried out in order to clean the underground water “Aktogay wide place”. During the research work, various painful heavy metals were found in the composition of the source water that do not meet the maximum permissible (MPC). For example, iron (Fe2+, Fe3+) solutions met 2.00 – 2.2 mg/l. This means that the MPC is 7 times more than the specified value. In order to solve this problem, research work was carried out. During the technological process, various amounts of ozone (O3) were released into the water, the amount and effective economic indicators of which were determined. In the same way, the effective time of the oxidation and cleaning process was determined. During the research process, an algorithm of theoretical calculations was developed and a mathematical model was given to bring 1m3 of groundwater to a fixed indicator. In order to determine the effectiveness of cleaning the iron contained in the water by the concentration of ozone and the filter load, water filtration works were carried out at different speeds of 5.5 – 9.5 m/h. For example, with an ozone content of C =100 mg/l and a filtration rate of 9.5 m/h, you can see that the iron content in water is purified by 30% percent, 8.5 m/h – 55% percent, 7.5 m/h – 77% percent, and 5.5 m/h – 90% percent. Experimentally and theoretically, it was found that Iron solutions with water content were purified by 98 – 98.7% percent, respectively, with an ozone concentration of C = 500 – 600 mg/l and a filtration rate of 5.5 m/h.

Purpose. The primary objective of this research is to develop a technology for achieving water quality at the level of Maximum Permissible Concentrations (MPC) required by sanitary regulations and norms. Methods. To meet these regulatory requirements, experimental studies were conducted to analyze the chemical and microbiological composition of water, focusing on parameters such as the total microbial count (quantity/ml), coliform bacteria (quantity/ml), coliphages (quantity/100 ml), clostridia (cl/20 ml), and other harmful substances. The research also examined water disinfection processes depending on the autumn and winter seasons of the year. Findings. To assess the device’s effectiveness, the research determined the optimal ozone concentration and contact time in the disinfection chamber. The findings indicate that 0.6 grams per hour (G = 0.6 g/hour) of ozone (O3) per cubic meter of surface water is sufficient for the removal of harmful microbiological substances. Originality. The primary innovation in this research lies in the establishment of parameters for an ozone generator utilizing a novel corona discharge method. The study introduces both theoretical frameworks and practical methodologies for effectively disinfecting surface waters using this innovative technique. Practical implications. This case study offers insights that can be applied and replicated in regions facing similar water quality challenges.

In this research paper, the problem of studying the effectiveness of ozone in the process of water treatment is considered. In the course of the scientific work, a review of domestic and foreign literature was conducted, its advantages and disadvantages were considered. The research paper...

In this scientific work, the problem of studying the process of destruction of microorganisms in water by an Etro-03 device based on electric corona discharge is considered. In the research, a special Etro-03 ozonator device was developed for clearing water of biological pollutants. Testing of the installation was carried out in order to disinfect surface water in the Kapshagai reservoir. During the research, various harmful microorganisms were found in the composition of the primary water that did not meet the maximum permissible concentration (MPC). For example, coliphages, coli-indices, and the number of microbes in general came across in large numbers. During the technological process, various amounts of ozone (O3) were released into the water, the amount and effective economic indicators of which were determined. In the same way, the effective time of the decontamination process was determined. During the research process, an algorithm of theoretical calculations was developed, and a mathematical model was given to bring 1m³ of surface water as the indicator for which sanitary rules and norms are approved.

This scientific research work deals with water disinfection in surface water reservoirs. According to the research, work was carried out to eliminate harmful microorganisms, viruses and microbacteria in the water. According to scientific research work, the electronic circuit of the device for capturing UV rays with a wavelength of 220-240 nm was studied. In the same way, the energy and spectral characteristics of the device, the parameters related to current and power are provided. The design and economic efficiency of the UV radiation device was considered and studied experimentally. In the water production technology, the main sanitary requirements for the organization of UV disinfection of water were considered. In the article , a number of provisions of the main documents of water and sanitary legislation regarding the quality of purified water, hygienic requirements, amount of ultraviolet radiation guaranteeing a given degree of disinfection, ultraviolet installations and their location were shown. At the same time, the scheme of the cleaning process, as well as measures to ensure safe working conditions of the personnel servicing the equipment were considered.