A Spesivtsev - Academia.edu (original) (raw)

Papers by A Spesivtsev

2017 XX IEEE International Conference on Soft Computing and Measurements (SCM)

The paper presents an example of convolution of multi-criteria expert estimates in a context of u... more The paper presents an example of convolution of multi-criteria expert estimates in a context of uncertainty by constructing a logical-linguistic model. The adequacy of the model was verified by the assessment results of the effectiveness of technologies in agro-industrial production.

Engineering for Rural Development, 2018

Reindeer velvet antlers are a valuable raw material for the production of various medicinal produ... more Reindeer velvet antlers are a valuable raw material for the production of various medicinal products, since they concentrate a whole range of macro-and microelements, amino acids and lipids, hormones and enzymes in reindeer antlers, they can be used as an additional source of nutrients. Practical methods of extracting valuable components from reindeer antlers are not optimal. The losses of velvet antler raw materials due to the immaturity of extraction technology are really heavy. Considering that reindeer antlers are scarce and quite expensive raw materials, their full-scale use is of vital importance. The problem of maximum extraction of valuable components from reindeer antlers by extraction has been posed and solved. At the same time, there has been studied the influence of fineness of grinding of raw materials, temperature and various extraction methods such as maceration, remaceration, percolation, repercolation, etc. Much help in optimizing the extraction parameters is provided by mathematical methods in order to calculate the total extraction efficiency. The preliminary calculations of the efficiency of extraction revealed the best results for extraction processes using velvet antler raw materials of fine grinding, for this reason further calculations were made taking into account the parameters of this fraction. As a result of the experiments, the decisive influence of the extraction stage on the yield of valuable extragents was determined. Thus, with maceration (single-stage extraction) and the ratio of the raw material and the extragent of 1: 11.6 the efficiency is equal to 86.4 %, with three-stage extraction-it is 97.5 %, and with four-stage extraction it is 98.4 %. It follows that when extracting the velvet antler raw material by the remaceration method the best option is to carry out four extraction stages and use the fine grinding raw material.

Informatization and communication, 2021

Purpose. Currently, in the process of solving a wide range of problems in various subject areas, ... more Purpose. Currently, in the process of solving a wide range of problems in various subject areas, methods for assessing the state of complex objects (SLO) are actively used, among which expert knowledge (EK) occupies a special place. The article proposes a methodological approach to the use of explicit and implicit EK in assessing and predicting the state of the SL. Materials and methods. The article proposes an original fuzzy-feasibility approach to extracting, representing and formalizing the EK in the form of analytical models for assessing the state of the SL. Results. The article describes the essence of solving problems of extraction, formalization, processing and use of explicit and implicit expert knowledge for assessing the state of an SLO at a meaningful level. An example of solving the problem of predicting the level of damage to structural elements and equipment of launch complexes under conditions of intense thermal loading is given. Conclusions. The proposed methodologi...

According to veterinary statistics, the territory of the Taimyr region has 39 registered areas wi... more According to veterinary statistics, the territory of the Taimyr region has 39 registered areas with an epizootic epidemic of anthrax fever. Anthrax is a potentially dangerous infect1ious disease for both animals and humans. The spores of the causative agent of anthrax retain their viability and pathogenicity for 50-70 years or more. Therefore, many old foci of anthrax infection (“epizooty sites”) are potentially dangerous at the present time. In connection with the intensive industrial development of the Far North regions, leading to excavation in high-risk areas for anthrax, there is a need to predict the possibility of occurrence and prevention of infection in these areas. A logical-linguistic model for estimating the probability of occurrence of anthrax infection in the five-dimensional factor space has been constructed on the basis of expert knowledge, which makes it possible to carry out epizootic monitoring in a quantitative form. The results of the prognostic estimation have ...

III INTERNATIONAL SCIENTIFIC FORUM ON COMPUTER AND ENERGY SCIENCES (WFCES 2022)

SOFT MEASUREMENTS AND COMPUTING

Security is always relevant, especially for particularly important objects. However at present th... more Security is always relevant, especially for particularly important objects. However at present the tasks of quantitative assessment of complex safety are solved, as a rule, locally for each object due to the absence of generalized methodology. At all fundamentality of statement of tasks of estimation of complex safety of especially important objects in regulating documents they have mainly declarative character. In this study we made an attempt to synthesize a mathematical model of quantitative assessment of integrated security of critical facilities on the basis of fuzzypossibility approach (FPL), using the knowledge and experience of experts. In this case, the methodology of FEA provides the representation of expert knowledge by fuzzy linguistic variables in a multidimensional factor space, followed by their formalization by a fuzzypossibility model.

Proceedings. 25th Annual 1991 IEEE International Carnahan Conference on Security Technology

A few hundred of various computer viruses are known so far. Moreover, their number is increasing.... more A few hundred of various computer viruses are known so far. Moreover, their number is increasing. Some kinds of viruses are of severe danger for the information stored in the personal computer. Here we study the methods used by computer viruses to reproduce themselves in IBM PCcompatibles operating under MS-DOS. Our results can be of use for classification of viruses and creating of anti-virus tools. In bibliography, the reader is introduced into papers of soviet authors.

Russian Journal of Non-ferrous Metals, 2002

2017 XX IEEE International Conference on Soft Computing and Measurements (SCM), 2017

Based on expert knowledge an adequate logical-linguistic model of the complex system “bio-ferment... more Based on expert knowledge an adequate logical-linguistic model of the complex system “bio-fermenter-bio fermentation process” was created, which can be used to select the rational operating modes and as a knowledge base when designing an integrated automatic control system of the developed technology.

Russian Journal of Non-ferrous Metals, 2000

Journal of computer & system sciences international, 1995

A method is proposed for formalizing fuzzy expert information that enables one to represent the k... more A method is proposed for formalizing fuzzy expert information that enables one to represent the knowledge of an expert by a polynomial of arbitrary order with the minimum number of references to him

SOFT MEASUREMENTS AND COMPUTING, 2021

Teachers always face problems when assessing the competence level of test participants (whether s... more Teachers always face problems when assessing the competence level of test participants (whether students, undergraduates, etc.) in both moral and psychological fields as well as methodological. This raises important questions on the creation of professional systems, which have mathematical models set forth for their vital foundational path. The current working method in the creation of mathematical models for evaluating the competency of test participants is based on a fuzzy logic approach using both the explicit and implicit knowledge of highly qualified experts. One can see the realisation of this method in the example of Englishlanguage instruction. A comparison of two common assessment scales for knowledge of the tested has been carried out – the «fivepoint » standard adopted in Russia (or required, actually) and the converted sevenpoint ECTS (European Credit Transfer and Accumulation System) rating scale which is based on percentage. This study has shown that teachers cannot ef...

$Research paper thumbnail of Service conditions of the refractory lining of reverberatory furnaces$

2016 XIX IEEE International Conference on Soft Computing and Measurements (SCM), 2016

Based on the logical-linguistic models the forecasting estimation was made of development of the ... more Based on the logical-linguistic models the forecasting estimation was made of development of the hard to formalize process of grass feed conservation with due account for the interaction of available resources and weather conditions.

Izvestiya Vuzov. Tsvetnaya Metallurgiya (Proceedings of Higher Schools. Nonferrous Metallurgy), 2015

Управление процессом Ванюкова в агрегате ПВ-3 при переработке сульфидной шихты на штейны с высоки... more Управление процессом Ванюкова в агрегате ПВ-3 при переработке сульфидной шихты на штейны с высоким содержанием меди представляется сложной многопараметрической задачей, для решения которой нет возможности предложить формальную модель. Основным фактором, привносящим нестабильность и неустойчивость в любые попытки формализации, является неопределенность входных переменных. Так, например, неопределенность информационного канала «шихта» выражается в колеблемости химического состава и влажности УДК 669.013