Diagnostics, treatment and prophylactics of the urine-issue ways trauma in endometriosis laparosurgery

United literature data and original authorsobservations concerning the problem of the urine-issue ways trauma in laparoscopic surgery in gynecology are presented in this article. Matters of intra- and after-operational diagnostics of such affections are considered. Concrete recommendations concerning prophylactics are given and own experience in treatment of urethra and urinary bladder injuries while laparoscopic curing in endometriosis patients is indicated.

Analysis of the existing legal, regulatory and technical support for the prevention of environmental emergencies at gas pipeline facilities in Uzbekistan

Operation of new and existing pipeline systems is carried out in accordance with the relevant instructions, with technical inspections, diagnostics and control carried out, if necessary. In accordance with the pipeline safety concept being developed, the possibility of operational diagnostics of the occurrence and development of emergency situations should be provided. Analysis of data for the last years of gas pipeline operation indicates the occurrence of various environmental emergency situations. Therefore, the task of this study is to classify the factors of accidents and damage to gas pipelines with the determination of the main share of the most significant. The proportion of emergencies due to mechanical damage to pipes by machines and mechanisms during excavation has maximum values. This indicates that during this period of time, many violations of technological regulations were registered. With regard to emergencies due to corrosion damage, there is some stability. As can be evidenced in this research paper, mainly accidents, repairs and leaks occur in summer - winter periods.

A computer program for electromechanical system operational diagnostics based on the topological approach

The paper presents a method, a mathematical model, and a computer program for the operational diagnostics of an electromechanical system (EMS). During EMS operation, service aging changes the properties of the parametric matrices of the windings and, as a consequence, the characteristics of the EMS vector space. Periodic testing of the vector space offers relevant and reliable data on the current health of the EMS, its changes during operation, and the risk of loss of function. The object of the study is an asynchronous electric motor (AEM). It is urgent to automate the process of assessing the current health of an AEM and to organize the storage of information on its states at different stages of its life cycle. To solve the problem, software (SW) for accumulation of information on AEM operation and for evaluation of its basic performance metrics has been developed in the Python programming language. The SW is based on the topological approach to diagnostics, which implies the analysis of the current responses of motor rotor windings to phase voltage pulses. The SW enables one to determine the rate of the service aging of an item, the probability of its survival and residual life, to obtain access to the history of previous diagnostics, and to visualize the in-service history of the above-mentioned performance metrics. The developed SW can be used to increase the AEM operation efficiency and to plan engineering or repair work; it can also be used as an information source for re- engineering and modification of existing AEMs. The described SW can be extended to perform operational diagnostics based on the topological approach of devices of various types. Also, this SW can be considered as a separate information component of the digital twin of a complex EMS, which will allow us to study the main indicators of its reliability, fault tolerance and operational efficiency at all stages of the life cycle.

Method for Operational Diagnostics of the Prepumping State of Gas Turbine Engines Based on Invariants of Acoustic Processes

A large number of aviation events are associated with the surge of gas turbine engines. The article analyzes the existing systems for diagnostics of the surge of gas turbine engines. An analysis of the acoustic signal of a properly operating gas turbine engine was carried out, at which a close theoretical distribution of random values was determined, which corresponds to the studied distribution of the amplitudes of the acoustic signal. An invariant has been developed that makes it possible to evaluate the development of rotating stall when analyzing the acoustic signal of gas turbine engines. A method is proposed for diagnosing the pre-surge state of gas turbine engines, which is based on processing an acoustic signal using invariant dependencies for random processes. A hardware-software complex has been developed using the developed acoustic method for diagnosing the pre-surge state of gas turbine engines.

Rapid Diagnostic Test of Metal Turning Using Vibration Parameters Analysis

Purpose of research. The work is devoted to the proof that the vibration of the cutting tool holder carries information about the current cutting force and the type of coming off chips, and the spectral analysis of vibration acceleration will allow to extract this information in full. Methods. The work logically substantiates a scientific assumption about the possibility of prompt diagnostics of the turning process by analyzing the vibration acceleration spectrum of the cutting tool holder. To confirm the consistency of the assumption, a full-scale experiment was carried out. Results. A series of experiments was carried out to register changes in the spectral composition of the vibration of the cutting tool. It has been proven that vibration really carries information about the basic parameters of the cutting process. Conclusion. Spectral analysis of vibration can become the basis for operational diagnostics of metal turning by cutting and form the basis of the Adaptive System for Controlling Cutting Conditions in numerically controlled machines.

A Method for Studying Inhomogeneous States of Induction Motors

The presented study is aimed at carrying out scientifically grounded assessments of the current technical state of induction motors (IMs). The existing classical theory of IMs has insufficient generality for solving this problem. It does not cover the state of IMs that feature manufacturing and technological deviations, as well as states with operational damages or ageing. The variety of IM operational states and design versions generates the need to widen the classical framework of analysis to the level of multidimensional representations. Such study was carried out within the framework of a topological approach. According to this approach, an IM is considered as a multidimensional inhomogeneous electromechanical system that can be in homogeneous or inhomogeneous states. From the methodological point of view, the topological approach is based on observing and analyzing the formal properties of a mathematical model with transferring their results to the real object. The rules and a systematized conceptual and terminological framework presented in the article play an essential role. In addition, the method of a topological study and its examples are given. Thus, the study covers all components of the scientific approach focused on a multidimensional representation of the IM operational states. The topological approach forms a scientific and methodological platform for setting up a system for monitoring the current technical state of IMs during their operation. It is pointed out that the existing diagnostic methods are focused on recording external manifestations of parametric heterogeneity. In view of this circumstance, they cannot serve as a reliable basis for drawing up conclusions on the current technical state of IMs. The topological method of operational diagnostics is focused on recording and analyzing changes in the internal properties of an object and is practically independent of the influence of external factors. This feature guarantees high reliability of the results obtained from applying the topological diagnostics method for estimating the current technical state of IMs.

Development of artistic abilities of preschool and primary school age children in the digital educational environment of additional education

With the help of the technology of operational diagnostics of artistic abilities, the potential inclinations of artistic and creative activity in children of preschool and primary school age were identified and the range of identified interests in additional education programs was realized. Two groups of respondents of different ages were examined: 6-7 years old in the amount of 45 persons, 9-11 years old in the amount of 85 persons. In the course of the study, it was concluded that the technology of operative diagnostics of artistic abilities is effective at any of these ages. There is a correlation between the motivational and operational readiness of the individual and the success of artistic and creative activity. We have selected the most effective forms of virtual education for the successful development of children’s artistic abilities.

ANALYSIS OF INHOMOGENEOUS ELECTROMECHANICAL SYSTEMS BASED ON A TOPOLOGICAL APPROACH

Stricter requirements for the efficiency and reliability of technical systems predetermine an in-depth study of electromechanical systems. The study involves taking into account the heterogeneity of their physical and vector space as operational factors that have a significant impact on the energy efficiency and reliability of the object. The proposed topological approach to the study of heterogeneous electromechanical systems (NEMS) is based on the analysis of their vector space. The multidimensionality, heterogeneity, and composite nature of the vector space are analyzed. Typical examples of the restrictions imposed on space vectors by the connection schemes of three-phase and multiphase NEMS windings are given. The main energy field is presented and the principle of the formation of the effective energy state of NEMS is formulated. Describes the tasks and method of implementing the operational diagnostics of NEMS based on the topological approach. In conditions of uncertainty, as well as heterogeneous quality, insufficient data, the feasibility of sharing the methods of fuzzy cognitive and logical analysis and modeling is substantiated. A cascade hybrid model is proposed, as well as methods for studying the vector space and operational diagnostics of NEMS based on it.

Methods and means of increasing operation efficiency of the fleet of electric motors in non-ferrous metallurgy

Arranging efficient operation of the fleet of induction motors (IM) in non-ferrous metallurgy is a large-scale technical and economic problem. In scientific aspect, the problem is being solved in the framework of two research lines: in developing criteria for the efficient operation of the branch IM fleet and towards the development of methods and tools for implementing the IM fleet efficient operation. The article presents the results of the authors’ work in the mentiond areas. The basis for developing criteria for efficient operation is modeling of current operational states, taking into account the IM operational aging processes. The existing methods and models are poorly focused on fixation of the changes caused by operational aging. There exists a demand for special methods and tools for modeling the IM operational conditions. A mathematical model based on Kolmogorov equations is one of these tools. The system graph and equations of the mathematical model are given. An example of a practical calculation of the no-failure operation probabilities at different rates of repair operations is given. It is stated that the offered mathematical model can serve as an instrument for developing criteria of the IM pool efficient operation. The system of periodic operational diagnostics is ment to be a key element in enhancement of the IM fleet operation efficiency. A topological method worked out for the problems of operational diagnostics is focused upon analyzing the dynamics of operational changes taking place in the IM vector space. The matrix of current deviations is a medium of objective and reliable information about the current IM technical condition. Matching the matrices of current and limiting deviations allows us to make several essential conclusions concerning the IM technical state. The reported study was funded under as a part of state assignment (project number, FSWF-2020–0019), as well as at the expense of RFBR (project number, 20-01-00283).