Technology audit and production reserves 2023-05-17T17:35:51+03:00 Liliia Frolova Open Journal Systems <p align="justify"><strong>The aim</strong> of the «Technology audit and production reserves» journal is to publish research papers dealing with the search for opportunities to reduce costs and improve the competitiveness of products in industry. The peculiarity is that <strong>each problem is considered from two sides - the economist’s and the engineer’s</strong>, for example, in the context of forming the «price – quality» criterion, in which the first component concerns research in the field of business economics, and the second - engineering. The research result at the intersection of these disciplines can be used in the actual production to identify reserves, providing the opportunity to reduce costs and improve product competitiveness.</p> Development of methods for identifying the state of various dynamic objects 2023-05-17T17:35:51+03:00 Oleksii Romanov Andrii Shyshatskyi Oleh Shknai Volodymyr Yashchenok Tetiana Stasiuk Oleksandr Trotsko Nadiia Protas Hennadii Miahkykh Vira Velychko Dmytro Balan <p><em>Artificial intelligence technologies are actively used to solve both general and highly specialized tasks. In the process of assessing (identifying) the condition of complex and heterogeneous objects, there is a high degree of a priori uncertainty regarding their condition and a small amount of initial data describing them. The trends of armed conflicts of the last decades and the regularities of the development of information systems, convincingly indicate the need to change approaches to the collection of information from various sources and their analysis. There is a constant transformation of the forms of information presentation and the order of storage and access to various types of data. The problem of integrating disparate sources of information collection into a single information space is also not fully resolved.</em></p> <p><em>That is why the issue of improving the efficiency of assessing the state of complex and heterogeneous dynamic objects is an important and urgent issue. </em><em>The objects of research are heterogeneous dynamic objects. The subject of the research is the identification of the state of heterogeneous dynamic objects. In the research, the method of identifying the state of heterogeneous dynamic objects was developed. The novelty of the proposed method consists in:</em></p> <p><em>‒ taking into account the degree of uncertainty about the state of a heterogeneous dynamic object;</em></p> <p><em>‒ taking into account the degree of data noise as a result of distortion of data characterizing the state of a heterogeneous dynamic object;</em></p> <p><em>‒ reducing computing costs while assessing the state of heterogeneous dynamic objects;</em></p> <p><em>‒ the possibility of performing calculations with source data that are different in nature and units of measurement.</em></p> <p><em>It is advisable to implement the mentioned method in specialized software, which is used to analyze the state of complex technical systems and make decisions.</em></p> 2023-05-20T00:00:00+03:00 Copyright (c) 2023 Oleksii Romanov, Andrii Shyshatskyi, Oleh Shknai, Volodymyr Yashchenok, Tetiana Stasiuk, Oleksandr Trotsko, Nadiia Protas, Hennadii Miahkykh, Vira Velychko, Dmytro Balan Characterization of phosphate wastes of Djebel Onk mining complex for a sustainable environmental management 2023-05-10T14:52:17+03:00 Rachid Salhi Djamel Nettour Mohamed Chettibi Cherif Gherbi Aissa Benselhoub Stefano Bellucci <p><em>The objects of the research are phosphate ore rejections – industrial waste resulting from the treatment of phosphate ore by different processes (particle size separation, calcination, physicochemical process, electrostatically process, etc.). These discharges are generally stored in specially constructed sedimentation ponds. However, its storage for a long period leads to serious environmental problems because they contain heavy and radioactive metals that affect nearby communities. They contaminate groundwater and surface water through the infiltration of caustic solution laden with rare metals. To remedy these environmental disasters and manage these concerns, it is necessary to upgrade the discharges from the Djebel Onk complex and give an added value to the national economy. The start-up of the Djebel El Onk phosphate complex, in the province of Tebessa was in 1965, since that date, all the waste resulting from the beneficiation process has been dumped in the valley adjacent to the complex without any treatment or recycling, it should be noted that the Djebel Onk phosphate complex generates huge quantities of phosphate sludge (more than 4000 tons per day). This waste is relatively rich in useful substance. The results of chemical analyzes reveal that these sludge’s contain around 20.2 % of phosphate (P<sub>2</sub>O<sub>5</sub>) with the presence of different heavy metals such as Uranium, Cadmium, Zinc, Copper, and Arsenic et. Those metals threaten life of local residents and affects vegetation, livestock in nearby populated areas. However, this work systematically reviews the mineralogical and chemical characterization of the phosphate sludge rejected by the Djebel Onk treatment complex to develop a suitable method for their revaluation. In our work, in this viable environmental perspective, we try to highlight the use of wastes as an alternative raw material in building materials. The impact of heavy metals on the environment and health is determined by the chemical species, concentration, bioavailability and transport through food chains, unless they are released into nature due to the consequences harm they create. Certain elements, such as mercury, lead, cadmium, zinc, copper, etc., have no function in maintaining body balance and are immediately dangerous.</em></p> 2023-05-15T00:00:00+03:00 Copyright (c) 2023 Rachid Salhi, Djamel Nettour, Mohamed Chettibi, Cherif Gherbi, Aissa Benselhoub, Stefano Bellucci