Pub Date : 2022-01-01DOI: 10.36807/1998-9849-2022-63-89-88-92
A. Sagdatullin, G. Degtyarev
The purpose of the research work is to develop an algorithm for interpreting input variables by a discrete membership function of a fuzzy set for embedded and real-time systems. To achieve the goal set in the scientific work, the following tasks were solved: the study of fuzzy logical inference in automatic control systems: analysis of the fuzzy set building, representation of a discrete input values; development of an algorithm and software implementation for real-time systems. Methods for setting input variables for fuzzy logic systems were considered, an algorithmic implementation of the representation of the input value as an element of a fuzzy set and automatic calculation of the membership function was proposed.
{"title":"DEVELOPMENT OF AN ALGORITHM FOR INTERPRETATION OF INPUT VARIABLES OF FUZZY LOGIC CONTROLLER FOR REAL-TIME SYSTEMS","authors":"A. Sagdatullin, G. Degtyarev","doi":"10.36807/1998-9849-2022-63-89-88-92","DOIUrl":"https://doi.org/10.36807/1998-9849-2022-63-89-88-92","url":null,"abstract":"The purpose of the research work is to develop an algorithm for interpreting input variables by a discrete membership function of a fuzzy set for embedded and real-time systems. To achieve the goal set in the scientific work, the following tasks were solved: the study of fuzzy logical inference in automatic control systems: analysis of the fuzzy set building, representation of a discrete input values; development of an algorithm and software implementation for real-time systems. Methods for setting input variables for fuzzy logic systems were considered, an algorithmic implementation of the representation of the input value as an element of a fuzzy set and automatic calculation of the membership function was proposed.","PeriodicalId":9467,"journal":{"name":"Bulletin of the Saint Petersburg State Institute of Technology (Technical University)","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84723068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.36807/1998-9849-2022-62-88-58-65
D. A. Erofeev, L. N. Mashlyakovsky
Highly- and superhydrophobic characteristics of surfaces can dramatically increase protective properties of polymeric coatings and may add it new useful functions. For example, fabricating of hydrophobic coatings with self-cleaning, anti-icing, anti-fouling or fouling release properties, as well as producing filtrating systems, compounds that can selectively wets surfaces, coatings decreasing of liquid streams friction exists described in numerous research articles. Despite of an apparent simplicity of a water droplet behavior on the surface in theoretical basis of the wetting phenomena still exists unsolved questions, which prevent developing many new materials, including hydrophobic coatings. In the first part of review, the modern theoretical concepts, relating to the process of surface wetting are review. Advantages and limitations of existing models of liquid drop behavior on solid surface, hysteresis phenomena are discussed. Basic concepts concerning effect of morphology of surface layer on the wetting and value of contact angle and stability of liquid drop on solid surface are represented
{"title":"FABRICATING AND APPLICATION OF HYDROPHOBIC SILICON CONTAINING POLYURETHANE COATINGS. PART ONE: FOUNDAMENTALS OF HYDROPHOBICITY (REVIEW)","authors":"D. A. Erofeev, L. N. Mashlyakovsky","doi":"10.36807/1998-9849-2022-62-88-58-65","DOIUrl":"https://doi.org/10.36807/1998-9849-2022-62-88-58-65","url":null,"abstract":"Highly- and superhydrophobic characteristics of surfaces can dramatically increase protective properties of polymeric coatings and may add it new useful functions. For example, fabricating of hydrophobic coatings with self-cleaning, anti-icing, anti-fouling or fouling release properties, as well as producing filtrating systems, compounds that can selectively wets surfaces, coatings decreasing of liquid streams friction exists described in numerous research articles. Despite of an apparent simplicity of a water droplet behavior on the surface in theoretical basis of the wetting phenomena still exists unsolved questions, which prevent developing many new materials, including hydrophobic coatings. In the first part of review, the modern theoretical concepts, relating to the process of surface wetting are review. Advantages and limitations of existing models of liquid drop behavior on solid surface, hysteresis phenomena are discussed. Basic concepts concerning effect of morphology of surface layer on the wetting and value of contact angle and stability of liquid drop on solid surface are represented","PeriodicalId":9467,"journal":{"name":"Bulletin of the Saint Petersburg State Institute of Technology (Technical University)","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79369856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.36807/1998-9849-2022-63-89-100-103
A. V. Bakhtin, Marina O. Slyuta
Paper color is one of the most important indicators of paper quality. Currently there is no information on functional color management systems. The study contains an analysis of information on the quality of color management on various paper machines for the production of printed papers. The research methodology consisted in the formation of a sample of numerical values of color coordinates in the CIE system from the archives of the APCS servers and laboratories of quality departments at factories. The analysis of the quality of operational control systems was carried out on the basis of the calculated histograms of the color coordinates of finished paper. The article presents the results of statistical processing of data about changes in the color coordinates L, a, b of the finished paper. Based on those results, the correlation of the dosage of chemical reagents and the color of the paper web is visible.
{"title":"QUALITY RESEARCH OF PAPER COLOR MANAGEMENT SYSTEMS","authors":"A. V. Bakhtin, Marina O. Slyuta","doi":"10.36807/1998-9849-2022-63-89-100-103","DOIUrl":"https://doi.org/10.36807/1998-9849-2022-63-89-100-103","url":null,"abstract":"Paper color is one of the most important indicators of paper quality. Currently there is no information on functional color management systems. The study contains an analysis of information on the quality of color management on various paper machines for the production of printed papers. The research methodology consisted in the formation of a sample of numerical values of color coordinates in the CIE system from the archives of the APCS servers and laboratories of quality departments at factories. The analysis of the quality of operational control systems was carried out on the basis of the calculated histograms of the color coordinates of finished paper. The article presents the results of statistical processing of data about changes in the color coordinates L, a, b of the finished paper. Based on those results, the correlation of the dosage of chemical reagents and the color of the paper web is visible.","PeriodicalId":9467,"journal":{"name":"Bulletin of the Saint Petersburg State Institute of Technology (Technical University)","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82291366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.36807/1998-9849-2022-61-87-85-91
V. Zaytsev
The pollution of the urban atmosphere in the area of the direct action of the motorway is considered. A certified environmental impact assessment methodology was used as the master. With its help, the masses of substances – that are primary pollutants – emitted per unit of time are calculated depending on the intensity of the traffic flow. Further, to calculate their concentrations, the dispersion is calculated. In order to determine the concentration of the secondary pollutant, ozone, a mathematical model is proposed. It is a stiff system of differential equations that describes the kinetics of the process of chemical transformation of primary pollutants. To solve it, the Rosenbrock method was applied. The influence of the traffic flow density on the ozone content near the highway is being studied
{"title":"FEATURES OF SECONDARY AIR POLLUTION DURING CHANGING OF THE TRANSPORT STREAM DENSITY","authors":"V. Zaytsev","doi":"10.36807/1998-9849-2022-61-87-85-91","DOIUrl":"https://doi.org/10.36807/1998-9849-2022-61-87-85-91","url":null,"abstract":"The pollution of the urban atmosphere in the area of the direct action of the motorway is considered. A certified environmental impact assessment methodology was used as the master. With its help, the masses of substances – that are primary pollutants – emitted per unit of time are calculated depending on the intensity of the traffic flow. Further, to calculate their concentrations, the dispersion is calculated. In order to determine the concentration of the secondary pollutant, ozone, a mathematical model is proposed. It is a stiff system of differential equations that describes the kinetics of the process of chemical transformation of primary pollutants. To solve it, the Rosenbrock method was applied. The influence of the traffic flow density on the ozone content near the highway is being studied","PeriodicalId":9467,"journal":{"name":"Bulletin of the Saint Petersburg State Institute of Technology (Technical University)","volume":"84 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84042778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.36807/1998-9849-2022-62-88-30-33
N. Sergeeva, S. P. Bogdanov
The article presents the results of studying the surface of Si(111)/nano 3C-SiC p- and n-type heterostructures (HS) after their modification in an aqueous solution containing phosphor and sodium salt by scanning electron microscopy in the contrast mode and infrared light reflection spectroscopy. Porous p-type HSs had anomalously high optical properties
{"title":"MORPHOLOGY AND INFRARED SPECTROSCOPY OF Si(111)/NANO SiC p- AND n-TYPE HETEROSTRUCTURES","authors":"N. Sergeeva, S. P. Bogdanov","doi":"10.36807/1998-9849-2022-62-88-30-33","DOIUrl":"https://doi.org/10.36807/1998-9849-2022-62-88-30-33","url":null,"abstract":"The article presents the results of studying the surface of Si(111)/nano 3C-SiC p- and n-type heterostructures (HS) after their modification in an aqueous solution containing phosphor and sodium salt by scanning electron microscopy in the contrast mode and infrared light reflection spectroscopy. Porous p-type HSs had anomalously high optical properties","PeriodicalId":9467,"journal":{"name":"Bulletin of the Saint Petersburg State Institute of Technology (Technical University)","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83408622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.36807/1998-9849-2022-63-89-51-57
Victor I. Krutikov, A. Erkin, Viktor V. Tetz, I. V. Klaptyuk
A series of 6-arylaminopyrimidine-2,4(1H,3H)-diones were synthesized via transamination of 6-aminouracil. Among the target compounds, 3-(2,6-dioxo-1,2,3,6-tetrahydropyrimidine-4-yl)aminobenzoic acid methyl ester proved to be an effective endogenous interferon inducer. During biological evaluation followed by a patenting procedure, the ester was assigned the ImmuVag international nonproprietary name.
{"title":"INDUCERS OF ENDOGENOUS INTERFERON IN THE SERIES OF 6-ARYLAMINO-PYRIMIDINE-2,4(1H,3H)-DIONES: FROM DESIGN TO PRACTICE","authors":"Victor I. Krutikov, A. Erkin, Viktor V. Tetz, I. V. Klaptyuk","doi":"10.36807/1998-9849-2022-63-89-51-57","DOIUrl":"https://doi.org/10.36807/1998-9849-2022-63-89-51-57","url":null,"abstract":"A series of 6-arylaminopyrimidine-2,4(1H,3H)-diones were synthesized via transamination of 6-aminouracil. Among the target compounds, 3-(2,6-dioxo-1,2,3,6-tetrahydropyrimidine-4-yl)aminobenzoic acid methyl ester proved to be an effective endogenous interferon inducer. During biological evaluation followed by a patenting procedure, the ester was assigned the ImmuVag international nonproprietary name.","PeriodicalId":9467,"journal":{"name":"Bulletin of the Saint Petersburg State Institute of Technology (Technical University)","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76924464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.36807/1998-9849-2022-62-88-45-49
Nikolay F. Fedorov, A. S. Knyazev, G. K. Ivakhnyuk, Natalya V. Maidanova, A. S. Drinberg, Tazhir E. Mametnabiev
Based on the results of the study of composite compositions based on cement and low-temperature silicate hydrate magnesium (based on serpentinite) plasticizing zatvoritelya, salt and acid-basic type, the proposed new areas of recycling enrichment of chrysotile asbestos mine and serpentinite in mineral binding construction materials and for special purposes
{"title":"NEW FUNCTIONAL ADHESIVES ON THE BASIS OF SERPENTINITE","authors":"Nikolay F. Fedorov, A. S. Knyazev, G. K. Ivakhnyuk, Natalya V. Maidanova, A. S. Drinberg, Tazhir E. Mametnabiev","doi":"10.36807/1998-9849-2022-62-88-45-49","DOIUrl":"https://doi.org/10.36807/1998-9849-2022-62-88-45-49","url":null,"abstract":"Based on the results of the study of composite compositions based on cement and low-temperature silicate hydrate magnesium (based on serpentinite) plasticizing zatvoritelya, salt and acid-basic type, the proposed new areas of recycling enrichment of chrysotile asbestos mine and serpentinite in mineral binding construction materials and for special purposes","PeriodicalId":9467,"journal":{"name":"Bulletin of the Saint Petersburg State Institute of Technology (Technical University)","volume":"51 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81558418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.36807/1998-9849-2022-61-87-67-72
M. Dli, A. Puchkov, Ekaterina I. Rysina
A method is proposed for predicting the variables of a cyber-physical system that implements the technological process of phosphorus production; the variables are presented as a multidimensional time series. The method is based on the use of a deep neural recurrent network with an autoencoder structure, to which an attention mechanism is added. In it the information about the intermediate internal states of the encoder is available to the decoder and is used by it to form an output sequence of predictive values of process variables. The results of a model experiment in the MatLAB environment are presented, which showed a higher prediction accuracy of a neural network with the attention mechanism compared to a neural network without its use
{"title":"PREDICTION OF TECHNOLOGICAL SYSTEMS USING THE MECHANISM OF ATTENTION IN NEURAL NETWORKS","authors":"M. Dli, A. Puchkov, Ekaterina I. Rysina","doi":"10.36807/1998-9849-2022-61-87-67-72","DOIUrl":"https://doi.org/10.36807/1998-9849-2022-61-87-67-72","url":null,"abstract":"A method is proposed for predicting the variables of a cyber-physical system that implements the technological process of phosphorus production; the variables are presented as a multidimensional time series. The method is based on the use of a deep neural recurrent network with an autoencoder structure, to which an attention mechanism is added. In it the information about the intermediate internal states of the encoder is available to the decoder and is used by it to form an output sequence of predictive values of process variables. The results of a model experiment in the MatLAB environment are presented, which showed a higher prediction accuracy of a neural network with the attention mechanism compared to a neural network without its use","PeriodicalId":9467,"journal":{"name":"Bulletin of the Saint Petersburg State Institute of Technology (Technical University)","volume":"15 1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91259259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.36807/1998-9849-2022-63-89-65-67
Andrey A. Panferov
A method to evaluate and predict the dispersed material state of division in ball mill is considered. Its base is the stochastic model that installs the grinding process just running as the numerous crushing acts. The proposed method makes possible to find the mass fraction of small-sized particles at the mill output by the residence time of material, its mean value. The examples of state of division calculation in the laboratory and also in the industrial apparatuses are given
{"title":"A PREDICT METHOD TO FIND DISPERSED MATERIAL STATE OF DIVISION IN BALL MILL","authors":"Andrey A. Panferov","doi":"10.36807/1998-9849-2022-63-89-65-67","DOIUrl":"https://doi.org/10.36807/1998-9849-2022-63-89-65-67","url":null,"abstract":"A method to evaluate and predict the dispersed material state of division in ball mill is considered. Its base is the stochastic model that installs the grinding process just running as the numerous crushing acts. The proposed method makes possible to find the mass fraction of small-sized particles at the mill output by the residence time of material, its mean value. The examples of state of division calculation in the laboratory and also in the industrial apparatuses are given","PeriodicalId":9467,"journal":{"name":"Bulletin of the Saint Petersburg State Institute of Technology (Technical University)","volume":"83 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80364560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.36807/1998-9849-2022-62-88-16-20
Vasily S. Bessmertnyi, Nina I. Minko, M. Bondarenko, Dmitry V. Kochurin
A technology – based on the breakage of graded and container glasses – was developed for the production of glass microbeads in a plasma reactor. The regularities of the influence of the flow rate of plasma-forming gas argon and the power of the plasma reactor on the fractional composition of glass microbeads were established. It was shown that with an increase in the flow rate of plasma-forming gas from 1.0 m3/hour to 2,0 m3/hour and the current strength from 300 A to 400 A, the amount of fraction over 630 microns increases due to coagulation processes. It was established that under the influence of high plasma temperatures, about 6000-8000 K, complete melting and sphering of particles occur with the formation of glass microbeads ranging in size from 80 microns to 1250 microns. The microhardness, acid resistance and alkali resistance of glass microbeads were investigated.
{"title":"PLASMA TECHNOLOGY FOR THE PRODUCTION OF GLASS MICROBEADS BASED ON THE BREAKAGE OF CONTAINER AND GRADED GLASSES","authors":"Vasily S. Bessmertnyi, Nina I. Minko, M. Bondarenko, Dmitry V. Kochurin","doi":"10.36807/1998-9849-2022-62-88-16-20","DOIUrl":"https://doi.org/10.36807/1998-9849-2022-62-88-16-20","url":null,"abstract":"A technology – based on the breakage of graded and container glasses – was developed for the production of glass microbeads in a plasma reactor. The regularities of the influence of the flow rate of plasma-forming gas argon and the power of the plasma reactor on the fractional composition of glass microbeads were established. It was shown that with an increase in the flow rate of plasma-forming gas from 1.0 m3/hour to 2,0 m3/hour and the current strength from 300 A to 400 A, the amount of fraction over 630 microns increases due to coagulation processes. It was established that under the influence of high plasma temperatures, about 6000-8000 K, complete melting and sphering of particles occur with the formation of glass microbeads ranging in size from 80 microns to 1250 microns. The microhardness, acid resistance and alkali resistance of glass microbeads were investigated.","PeriodicalId":9467,"journal":{"name":"Bulletin of the Saint Petersburg State Institute of Technology (Technical University)","volume":"121 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78429234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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