scholarly journals Development and Prototyping of Jet Systems for Advanced Turbomachinery with Mesh Rotor

2021 ◽  
Vol 5 (5) ◽  
pp. 775-801
Author(s):  
Yuri Appolonievich Sazonov ◽  
Mikhail Albertovich Mokhov ◽  
Inna Vladimirovna Gryaznova ◽  
Victoria Vasilievna Voronova ◽  
Khoren Arturovich Tumanyan ◽  
...  
Keyword(s):  
Control Systems ◽  
Numerical Experiments ◽  
Velocity Vector ◽  
Methodological Approach ◽  
Calculated Data ◽  
Gas Production ◽  
Control Range ◽  
Research Results ◽  
Jet Control ◽  
Vector Angle

This article presents the research results that aim to develop promising mesh turbomachines equipped with jet control systems. The turbomachines operating in difficult conditions in oil and gas production are mainly considered. At the same time, some research results can be used in other production branches, including power engineering and transport. Three-dimensional models for computer simulation of net turbines and jet control systems were developed. Prototypes and micromodels were created to test the performance of mesh turbines and jet control systems using additive technologies. A methodological approach is proposed to create a classification of jet control systems considering their design and technological features. In the course of numerical experiments, the extreme conditions of fluid and gas outflow through a nozzle equipped with a velocity vector control system, in the control range of adjustment of the velocity vector deflection angle from + 90o to -90o within a geometric hemisphere, have been considered for the first time. It was also shown that when using a dual-channel nozzle, there are possibilities to adjust the velocity vector angle (thrust vector) in the range of + 180o to -180owithin the geometric sphere. Compared with the known variants, the control range of the velocity vector angle is increased by nine times. These calculated data are presented in addition to the previously published results of physical laboratory experiments. Preliminary results of numerical experiments show the possibility of creating a new theory in the field of mesh turbines and jet systems. Patents support the novelty of the developed technical solutions. Doi: 10.28991/esj-2021-01311 Full Text: PDF

Ефективність інноваційної діяльності харчової промисловості в системі цілей сталого розвитку країни

Ekonomika APK ◽  
2021 ◽  
Vol 319 (5) ◽  
pp. 46-56
Author(s):  
Olha Kovalenko ◽  
Liudmyla Yashchenko
Keyword(s):  
Sustainable Development ◽  
Capital Investment ◽  
Food Industry ◽  
Methodological Approach ◽  
Calculated Data ◽  
Weighted Average ◽  
Practical Significance ◽  
Educational Institutions ◽  
The Sustainable Development ◽  
Methodical Approach

The purpose of the article is to improve approaches to assessing the effectiveness of innovative activities of the food industry and its individual subsectors to identify prospects for development and problems that can hinder the sustainable development of this area of production and the country as a whole. Research methods. The article uses the methods of theoretical generalizations and comparisons, which made it possible to comprehensively consider and generalize methodological approaches to assessing the effectiveness of innovation in industries. When systematizing the calculated data by the intensity of innovation costs, the methods of statistical classification and grouping were used. To achieve the goal of the study, the methodology for assessing the level of manufacturability of industries has been improved (the OECD methodology is taken as a basis), which made it possible to re-evaluate the effectiveness of innovative activities in sub-sectors of the food industry with an emphasis on the computerization of production. Research results. The article presents a methodical approach to assessing the effectiveness of innovation in the food industry. The study is based on the OECD methodology for assessing the manufacturability of industries, which is to calculate the weighted average cost intensity of R & D. The application of this approach to the food industry has confirmed the too low level of its innovative manufacturability. It was found that due to the lack of relevant statistics on R&D expenditures, it is difficult to assess the effectiveness of innovation in certain sectors of the food industry. It is proposed to solve this problem with the help of capital investment indicators, which are invested in the software of industries and are directly related to the level of computerization of technological processes. The obtained indicators of the intensity of software costs are ranked in descending order and divided into three groups according to the level of computerization, which characterizes the efficiency of innovation, as its level increases profits and profitability in industries. This will contribute to the goals of sustainable development of the country (including goals 2 and 9) and increase the competitiveness of the food industry. Scientific novelty. A methodological approach to assessing the effectiveness of innovative activities of sub-sectors of the food industry in Ukraine is proposed, which will contribute to the formation of a new look at the research methodology of this area of knowledge. Practical significance. Designed for professionals in the field of food industry economics, scientists, teachers, graduate students and students of higher educational institutions. The results of the study can be used by experts to assess the level of manufacturability of industries. Tabl.: 3. Refs.: 30.

scholarly journals Hydraulic Tests and Interpretation of Test Data for Reno Mattresses in Open Channel Flow

2021 ◽  
Vol 930 (1) ◽  
pp. 012025
Author(s):  
P D Pietro ◽  
M Lelli ◽  
A Rahman ◽  
Serkandi
Keyword(s):  
Soil Erosion ◽  
Control Systems ◽  
Soil Layer ◽  
Erosion Control ◽  
Wire Mesh ◽  
Unit Weight ◽  
Research Results ◽  
Colorado State University ◽  
Soil Erosion Control ◽  
The Stability

Abstract The efficacy of erosion control systems depends on preventing soil loss underneath and maintaining its integrity under the effects of the water flow. The paper presents the research results at the Colorado State University on the performance of double twisted wire mesh products, known as Reno Mattresses, used as soil erosion control systems. Mattresses were subjected to various flow conditions on a 10 m long flume placed on a soil layer. The performance against erosion was evaluated by assessing the effect of the stone motion inside the mattress combined with the condition of incipient soil erosion underneath, in relationship to the mattress thickness, the filling stone properties, and under variable hydraulic flow regimes. At the same time, confirming the stability obtained using the conventional tractive force design approach, the research results allowed to introduce a new performance limit based on incipient soil erosion underneath the revetment. Based on the research results, the authors propose to express the shear resistance of mattresses used as soil erosion control systems as a function of the filling stones’ size, uniformity, unit weight, mattress thickness, and the presence of vertical strengthening elements.

Computational Intelligence for Modelling and Control of Multi-Robot Systems

2011 ◽  
pp. 122-135
Author(s):  
M. Mohammadian
Keyword(s):  
Genetic Algorithms ◽  
Fuzzy Logic ◽  
Control Systems ◽  
Fuzzy Systems ◽  
Methodological Approach ◽  
Knowledge Bases ◽  
Fuzzy Logic Systems ◽  
Fuzzy Knowledge Bases ◽  
Robot Systems ◽  
Logic Systems

With increased application of fuzzy logic in complex control systems, there is a need for a structured methodological approach in the development of fuzzy logic systems. Current fuzzy logic systems are developed based on individualistic bases and cannot face the challenge of interacting with other (fuzzy) systems in a dynamic environment. In this chapter a method for development of fuzzy systems that can interact with other (fuzzy) systems is proposed. Specifically a method for designing hierarchical self-learning fuzzy logic control systems based on the integration of genetic algorithms and fuzzy logic to provide an integrated knowledge base for intelligent control of mobile robots for collision-avoidance in a common workspace. The robots are considered as point masses moving in a common work space. Genetic algorithms are employed as an adaptive method for learning the fuzzy rules of the control systems as well as learning, the mapping and interaction between fuzzy knowledge bases of different fuzzy logic systems.

scholarly journals Bridging management control systems and innovation

2019 ◽  
Vol 16 (3) ◽  
pp. 342-372 ◽  
Author(s):  
Rúben Silva Barros ◽  
Ana Maria Dias Simões da Costa Ferreira
Keyword(s):  
Control Systems ◽  
Methodological Approach ◽  
Management Control ◽  
Management Control Systems ◽  
Positive Role ◽  
Content Type ◽  
Fine Grained ◽  
Qualitative Approaches ◽  
Innovation Mode ◽  
Behavioural Aspects

Purpose The purpose of this study is to present the evolution of thinking on the role of management control systems (MCSs) in innovation, according to the development of control practices, and to provide a reflection on the achievements of the more recent literature. Design/methodology/approach This paper assesses articles, books and book chapters that have explored MCSs in innovation, together with seminal works on management accounting and control. Findings Moving from the traditional phase where MCSs were seen as detrimental to innovation, the literature has now reached a new consensus that attributes a positive role to control. In this recent phase, it arises from the literature that MCSs in the realm of innovation should embrace a multiplicity of controls; MCSs depend on the magnitude and innovation mode of a company; MCSs evolve over time; and that synergies and tensions are expected to arise. Adding these factors to the inherent complexity of innovation, the assertion is that qualitative approaches should be undertaken to infuse the field with more fine-grained evidence. It is also proposed that this methodological approach be used to address the following points: (1) the use of multiple controls; (2) synergies and tensions; and (3) behavioural aspects of controls in relation with innovation. Originality/value The paper is of value for researchers who have an interest in studying the use of MCSs in innovation and in qualitative research and proposes some areas of research that could be explored.

scholarly journals THE EFFECT OF THE CYCLICAL NITROGEN INJECTION ON THE FINAL COEFFICIENT OF GAS RECOVERY AT DIFFERENT RATES IN THE DEPLETED GAS RESERVOIR

2018 ◽  
pp. 15-22
Author(s):  
R. M. Kondrat ◽  
L. I. Khaidarova
Keyword(s):  
Gas Production ◽  
Reservoir Pressure ◽  
Hydrocarbon Gases ◽  
Gas Reservoir ◽  
Recovery Coefficient ◽  
Research Results ◽  
Gas Recovery ◽  
Nitrogen Injection ◽  
Residual Gas ◽  
Depleted Gas Reservoir

The application of non-hydrocarbon gases with the aim of displacing residual gas from depleted fields is substantiated. Mathematical modeling is carried out of the process of residual gas displacing with nitrogen in the GEM compositional simulating module under the conditions of a hypothetical gas reservoir of circular shape. The said module is a part of the licensed CMG computer program. The effect of the cyclical nature of the aquifer injection nitrogen into depleted gas reservoir at different rates till the final gas recovery coefficient for residual gas is developed. The study concerns different durations of nitrogen injection cycles into the reservoir (6, 12, 18, 24, 30, and 36 months) and various correlations of the rates of nitrogen injection and gas production in reservoir conditions of 1:1; 1.5:1; 2:1. During the nitrogen injection into the reservoir, the output wells stopped; whereas after surcease of the nitrogen injection, they were again exploited until the reservoir pressure reached to 0.1 Pprimary. Then the process of cyclic nitrogen injection into the layer continued, until nitrogen break through into the producing wells and its content in the produced products reached 5% vol. The research results were processed in the form of graphical dependencies of reservoir pressure, gas flow rate and gas recovery coefficient for residual gas at the end of the cycle of nitrogen injection into the reservoir as a function of the number of such cycles. The research results indicate a significant effect on the gas recovery coefficient for the residual gas of the duration of the cycle of nitrogen injection into the reservoir and the ratio of rates of nitrogen injection and gas production, with an increase in which the coefficient of gas output gradually decreases. According to the research results, the optimal parameters of the process of nitrogen injection into the reservoir should be chosen on the basis of technological results, as well as technical and economic calculations.

scholarly journals Assessment of socio-eco-economic effectiveness of circular business models in mineral production

2020 ◽  
pp. 80-89
Author(s):  
Mochalova Liudmila ◽  
◽  
Sokolova Olga ◽  
Keyword(s):  
Business Models ◽  
Methodological Approach ◽  
Environmentally Friendly ◽  
Economic Effectiveness ◽  
Economic Damage ◽  
Research Results ◽  
Russian State ◽  
Additional Costs ◽  
Mineral Production ◽  
Production Research

Introduction. According to Russian state reports on the environment, mining sector in Russia accounts for a significant amount of environmental impact. Research aim is to substantiate a methodological approach to assessing the effectiveness of using environmentally friendly circular business models in mining enterprises. Research methodology includes the study, critical assessment and systematization of the methods of environmental circular activity results determination in mineral production. Research results. The effectiveness of circular business models is considered as a condition for their application. It consists of ecological, socio-ecological and eco-economic effectiveness, so it can be termed in an integrated manner as the socio-eco-economic effectiveness. Ecological and socioecological types of effectiveness are determined by the prevention, minimization or elimination of environmental and social harm. Considering that environmental and social losses, for well-known reasons, can never get a fair integrated assessment, in practice it is necessary to apply the indicators of ecological and socio-ecological damage, which do not fully reflect the amount of harm caused. The ecoeconomic effectiveness of circular business models is associated with the prevention, minimization or elimination of national economy’s (economy of the country) existing or possible losses (damage) and/or additional costs caused by human impact to the environment in the process of subsurface use. In this case, we are talking about reducing the amount of eco-economic damage. Research results application. The research makes it possible to study and systematize currently proposed methods for assessing the extent of environmentally related damage caused by mining. The methods considered are intended to be applied in assessing the ecological, socio-ecological and eco-economic effectiveness of environmentally friendly circular business models in this field.

scholarly journals New wine in old bottles: governing logics for applying sustainability management control systems in Austrian electric utilities

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Johannes Slacik ◽  
Birgit Grüb ◽  
Dorothea Greiling
Keyword(s):  
Control Systems ◽  
Qualitative Content Analysis ◽  
Methodological Approach ◽  
Electric Utility ◽  
Management Control ◽  
Management Control Systems ◽  
Control Mechanisms ◽  
Sustainability Management ◽  
Content Type ◽  
Informal Controls

Purpose Literature shows that a strong link between sustainability control systems and sustainability management (SM) fosters sustainability development (SD) and compliance with regulatory requirements and stakeholder expectations. Research on the integration of SM and its control mechanisms in corporate business remains scarce. This study aims to focus on Sustainability Management Control Systems (S)MCS applied in Electric Utility Companies (EUC), which experience close scrutiny by its stakeholders in as much as they play an important role in climate change agendas. Design/methodology/approach The methodological approach includes in-depth expert interviews within seven Austrian EUC followed by qualitative content analysis. This study builds on “MCS as a package” by Malmi and Brown (2008). Institutional logics (IL) are used for the theoretical approach. Findings Results show that several IL are involved in implementing strategic SMCS in EUC. Managers cope by integrating emerging hybrid logics, selectively coupled SMCS and making sense by building a communication bridge between the strategic and operative levels to create awareness. Research limitations/implications Results show that managers in EUC have to acquire a new hybrid logic for SD. This implies the use of informal controls and a strong focus on administrative and cultural controls as the main control mechanisms for SM. Originality/value The paper contributes to MCS research by using the scarcely applied theoretical framework of IL. Findings facilitate a better understanding of the control mechanisms behind SM and the coping strategies of managers in applying SMCS.

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