Evaluating the efficiency of heat and power systems by the data envelopment analysis method

The article describes the Data Envelopment Analysis (DEA) method and the main features of its application. The main problems of heat and power systems are described, which are addressed by the DEA method of efficiency assessment presented in the article. The approbation of this method is presented at the objects of the centralized municipal heat supply system of the fuel and energy complex: boiler houses and heat and power plants. 9 objects were analyzed according to four input indicators: available heat capacity, installed heat capacity, heat consumption for own needs, fuel consumption. Also, the efficiency of the system was evaluated according to two output indicators: the release of thermal energy to the grid and the mass of the emission. As a result of the analysis and calculations made, it was revealed that 5 objects have the maximum possible efficiency indicator equal to 1, that is, they function as efficiently as possible. 4 objects of the centralized municipal heat supply system have an efficiency indicator less than 1. Accordingly, improvements are required for the operation of the above Decision-Making Units (DMU)s. These objects have deviations in terms of the inputs and outputs of the actual data and those obtained using the DEA method. Based on the calculations obtained for these 4 objects, the article provides recommendations for changing the quantitative values of their input and output indicators. For example, for object number 2, it is recommended to reduce the installed heat capacity in the grid by 72.57%, without changing the available heat capacity and fuel consumption. Reduce the heat consumption for your own needs by 69.383%. In addition, it is recommended to increase the supply of thermal energy to the grid by 6,034%, and reduce the mass of emission by 11.5%. Specific measures have also been developed to modernize the studied objects in order to achieve the recommended indicators of inputs and outputs. The research results presented in the article are of scientific and practical interest and can be used to improve the efficiency of heat and power systems facilities. © 2021, World Scientific and Engineering Academy and Society. All rights reserve

Гипоксия как ведущий патогенетический фактор постреанимационной кардиодепрессии

The paper estimates the hypoxic sensitivity of isolated isovolumetrically contracting hearts of non-inbred albino male rats experiencing 4-min clinical death from acute blood loss. In the early postresuscitative period, the inhibited contractility of the myocardium and its increased hypoxic sensitivity has been ascertained to be due to impaired bioenergetics and activated lipid peroxidation processes. A four-fold pO2 reduction in the Krebs-Henseleit solution causes a more rapid and more marked development of myocardial contractures and oxygenized solution-induced reperfusion brings about greater myocardial damages.В работе оценивается чувствительность к гипоксии изолированных изоволюмически сокращающихся сердец белых беспородных крыс-самцов, перенесших 4-минутную клиническую смерть от острой кровопотери. Установлено, что угнетение сократительной функции миокарда и его повышенная чувствительность к гипоксии в раннем постреанимационном периоде обусловлена нарушением биоэнергетики и активацией процессов липопероксидации. 4-кратное снижение рО2 в растворе Кребса-Хензелайта вызывает более быстрое и более выраженное развитие контрактур миокарда, а реперфузия оксигенированным раствором вызывает еще большие повреждения сердечной мышцы

STAFFING OF INNOVATION ACTIVITIES IN THE REGION

Текст статьи не публикуется в открытом доступе в соответствии с политикой журнала

STAFFING OF INNOVATION ACTIVITIES IN THE REGION

Текст статьи не публикуется в открытом доступе в соответствии с политикой журнала

Control by Technological Mode Parameters with an Intellectual Automated System

The scheme of functional correlation of input and output parameters of the «drilling rig - rolling cutter bit - rock» system is proposed. The necessity to apply drilling rigs of the automated intellectual system with the adaptive element for a quick time response of the investigated system on the change of physical and mechanical rock properties and the maintenance of the adjusted operating parameters of the technical system in an optimal rati

Question-Answering System

The paper gives a brief overview of the key problems of designing questionanswering systems. It offers the approach to the determination of the questionanswering system of giving an answer to the question based on a modified measure of one set to another inclusion. The results of the proposed approach in the problem of automatic selection of the answer to the question of several possible options are presented. These results showed that the system is able to give the correct answer (of 4 possible ones) in more than 50% of cases with a relatively small knowledge bas

Control by Technological Mode Parameters with an Intellectual Automated System

The scheme of functional correlation of input and output parameters of the «drilling rig - rolling cutter bit - rock» system is proposed. The necessity to apply drilling rigs of the automated intellectual system with the adaptive element for a quick time response of the investigated system on the change of physical and mechanical rock properties and the maintenance of the adjusted operating parameters of the technical system in an optimal rati

The use of mathematical calculations to determine the feasibility of borrowing in the planning period

The article presents mathematical calculations, conclusions and results obtained on the effectiveness of attracting borrowed resources into the economic activities of a commercial organization. In the presented calculations, the statistical method was used - Student's criterion for assessing the upper limit of the allowable amount of debt. The calculations were carried out as exemplified by a small enterprise LLC "Electrika" (conditional name), Krasnoyarsk, Russia. As a result of the experiments, the values of the level of allowable debt load for the enterprise were calculated. The resulting totals unequivocally indicate that the level of the debt burden of a commercial organization is high and the attraction of additional resources in the planning period is impractical