NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech最新文献

{"title":"Transformation of the individual MWCNT’s structure under electron irradiation and annealing in inert atmosphere","authors":"V. V. Bolotov, G. N. Kamayev, V. E. Kan, E. V. Knyazev, K. E. Ivlev","doi":"10.1063/1.5122133","DOIUrl":"https://doi.org/10.1063/1.5122133","url":null,"abstract":"The structure and properties of individual MWCNTs subjected to electron irradiation and thermal annealing in an inert atmosphere of Ar have been investigated by means of transmission electron microscopy, Raman spectroscopy, and electrophysical methods. It is shown that electron irradiation generates point defects and it changes the interlayer distance in the MWCNTs` walls. Thermal annealing in an inert atmosphere leads to a partial restoration of the MWCNTs` structure. At the same time, the large-scale defects are observed in the nanotube walls, due to which the MWCNTs acquire a `zigzag` form. Consecutive ionic and thermal treatments determine the MWCNTs` electrophysical properties and could be used as a method for conductivity manipulation.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114056198","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}

{"title":"High-temperature modification of sibunit for its application as a support for ruthenium catalysts in ammonia synthesis","authors":"V. A. Borisov, K. N. Iost, V. Temerev, Y. Surovikin, A. Smorokov, P. A. Fedotova, D. A. Shlyapin","doi":"10.1063/1.5122036","DOIUrl":"https://doi.org/10.1063/1.5122036","url":null,"abstract":"The effect of high-temperature (1400-2200°C) treatment of the carbon material Sibunit on its structural properties was studied. High-temperature treatment leads to structural ordering of the initial Sibunit. As a result of preliminary graphitization, specific surface area decreases by a factor of 10, but thermal stability increases. A good correlation between XRD, Raman spectroscopy and TGA data is observed. For the Sibunit sample treated at 2200 °C, the interplanar distance d(002) estimated by XRD decreases by 0.05 A in comparison with the initial Sibunit, ID/IG decreases from 1.59 to 1.18, and the 2D line substantially increases, which testify to the structural ordering. According to TGA, the temperatures corresponding to the onset of oxidation, 50% oxidation and the end of oxidation of Sibunit calcined at 2200 °C are synchronously shifted by 100 °C with respect to the initial Sibunit.The effect of high-temperature (1400-2200°C) treatment of the carbon material Sibunit on its structural properties was studied. High-temperature treatment leads to structural ordering of the initial Sibunit. As a result of preliminary graphitization, specific surface area decreases by a factor of 10, but thermal stability increases. A good correlation between XRD, Raman spectroscopy and TGA data is observed. For the Sibunit sample treated at 2200 °C, the interplanar distance d(002) estimated by XRD decreases by 0.05 A in comparison with the initial Sibunit, ID/IG decreases from 1.59 to 1.18, and the 2D line substantially increases, which testify to the structural ordering. According to TGA, the temperatures corresponding to the onset of oxidation, 50% oxidation and the end of oxidation of Sibunit calcined at 2200 °C are synchronously shifted by 100 °C with respect to the initial Sibunit.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125084878","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}

{"title":"The peculiarities of using nanofluids as working fluids in fire tube boilers","authors":"V. Shalai, A. Mikhailov, O. Vdovin, E. N. Slobodina","doi":"10.1063/1.5122087","DOIUrl":"https://doi.org/10.1063/1.5122087","url":null,"abstract":"The paper deals with addressing the issues pertaining to the heat exchange enhancement from the organic working fluid when using nanoparticles. The mathematical dependences of the fire-tube boiler thermal calculation are proposed. According to the calculation data, the graphical dependences of the heat transfer coefficients between the working fluid and furnace, metal structures temperatures, of the convective pipes and convective surface area heat transfer coefficient on the nanoparticles concentration were obtained.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"145 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122611901","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}

{"title":"Recultivation of soils contaminated with oil (50 g/kg) by earthworms E. fetida, E. andrei, D. veneta and their probiotics","authors":"S. B. Chachina, N. Voronkova, G. Kozlov, M. Gross, O. N. Baklanova","doi":"10.1063/1.5122021","DOIUrl":"https://doi.org/10.1063/1.5122021","url":null,"abstract":"The recultivation technology is developed for soils contaminated with oil in concentration of 50 g/kg for one year under the weather conditions of Western Siberia with biopreparation obtained from E. andrei, D. veneta earthworm coprolite and E. fetida, E. andrei, D. veneta earthworm vermiculture. The microflora composition of E. andrei, D. veneta coprolites is studied. The coprolites are used to obtain microorganisms-oil-destructors acting as a foundation of biopreparation \"Californian\" containing Bacillus careus, Bacillus mucoides, Bacillus thuringiens, Enterobacter cloacae, Lysinibacillus fusiformis, Pseudomonas putida, Pseudomonas aeruginosa (CFU – 1*1013) and preparation \"Dendrobaena\" having Bacillus careus, Bacillus mucoides, Bacillus thuringiens, Enterobacter cloacae, Lysinibacillus fusiformis (CFU 1*1011). The recultivation technology efficiency is determined for soils contaminated with oil and petroleum in concentration of 50 g/kg with biopreparations \"Californian\" and \"Dendrobena\" and earthworms E. fetida, E. andrei, D. veneta.The earthworms are highly potential in hydrocarbons removal even from the soils with oil concentrations up to 50 g/kg. The introduction of biopreparations increases the survival and reproductive potential of the earthworm in oil contaminated soils and results in significant removal of oil and petroleum hydrocarbons after 20-22 weeks in laboratory experiments. The method of recultivating oil-contaminated soil with oil concentrations up to 50 g/kg in presence of probiotic microorganisms and earthworms Eisenia fetida, Dendrobaena veneta, Eisenia andrei is proposed. Decontamination and recovery of the ecological functions of the oil- and other petrochemicals-contaminated substrates is carried out due to the following method: the substrate is treated with biopreparation, ploughed with a single-furrow plow and put under the steam for 1 month; afterwards, the earthworms are added in the amount of 1,000 per 1 m2 of the soil; and then, cow dung is added as a nutritional medium in the amount of 1 t per 1 ha of contaminated soil.The recultivation technology is developed for soils contaminated with oil in concentration of 50 g/kg for one year under the weather conditions of Western Siberia with biopreparation obtained from E. andrei, D. veneta earthworm coprolite and E. fetida, E. andrei, D. veneta earthworm vermiculture. The microflora composition of E. andrei, D. veneta coprolites is studied. The coprolites are used to obtain microorganisms-oil-destructors acting as a foundation of biopreparation \"Californian\" containing Bacillus careus, Bacillus mucoides, Bacillus thuringiens, Enterobacter cloacae, Lysinibacillus fusiformis, Pseudomonas putida, Pseudomonas aeruginosa (CFU – 1*1013) and preparation \"Dendrobaena\" having Bacillus careus, Bacillus mucoides, Bacillus thuringiens, Enterobacter cloacae, Lysinibacillus fusiformis (CFU 1*1011). The recultivation technology efficiency is determined for soils contaminated with oil and","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130280829","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}

{"title":"Experimental determination of conditional clearances in cylinder-piston seals","authors":"S. Busarov, D. Titov","doi":"10.1063/1.5122059","DOIUrl":"https://doi.org/10.1063/1.5122059","url":null,"abstract":"The currently relevant task of determining the dependence of the conditional clearance in the cylinder-piston seal on the working pressure with a fixed piston is solved by the authors in this paper. Experimental studies carried out allowed us to obtain the dependence of the conditional gaps on the pressure in the cylinder-piston seal of low-speed long-stroke units with static blow-downs. The obtained data allowed us to determine the best seal for piston low-speed long stroke units. In the future, the research results will allow to modernize the existing method of calculating the working processes of low-speed long-stroke units.The currently relevant task of determining the dependence of the conditional clearance in the cylinder-piston seal on the working pressure with a fixed piston is solved by the authors in this paper. Experimental studies carried out allowed us to obtain the dependence of the conditional gaps on the pressure in the cylinder-piston seal of low-speed long-stroke units with static blow-downs. The obtained data allowed us to determine the best seal for piston low-speed long stroke units. In the future, the research results will allow to modernize the existing method of calculating the working processes of low-speed long-stroke units.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129168237","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}

{"title":"Multi-factor model of diagnostic signals parameters vector formation for run on variables loading-speed modes machines","authors":"A. E. Tsurpal, A. Naumenko, A. I. Odinets","doi":"10.1063/1.5122155","DOIUrl":"https://doi.org/10.1063/1.5122155","url":null,"abstract":"The main and most important direction in the strategy for improving the operational reliability of the dynamic equipment mining, processing industries, production and transport industry is meeting the challenge of timely detection of and localization defects at an early stage of their development. This approach ensures the improvement of technology maintenance and repair, reduce operating costs and improve availability factor. To implement measures to improve reliability and safety, dynamic equipment at the facilities of the petrochemical production and transport complexes has been equipped with various condition monitoring systems for more than twenty years. The amount of information received by systems is usually great. However, the information quality is more important than its volume for accurate and timely recognition of error conditions and monitoring the development of faults in time. Therefore, an important task is to establish the diagnostic signs informative, determine their relationship with the relevant faults classes, as well as to establish the pattern of diagnostic signs changes in time in order to predict the moment of transition of nodes to the limit state. The model of the diagnostic signal parameters vector formation is presented in this paper. This model takes into account the influence of concomitant factors on some parameters values. These parameters values depend both on the object state as well as on a number of concomitant processes and their parameters. In terms of the problem, the concomitant factors can be divided into two groups: controlled and uncontrolled. The controlled factors measurement can be carried out in parallel with the diagnostic signal parameters measurement. The uncontrolled factors are parameters that are difficult or impossible to measure. The uncontrolled factors include all kinds of environmental fluctuations. The theoretical relationship between the technical condition and the diagnostic signal parameters, taking into account the influence of concomitant factors is described by presented diagnostic model.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131220151","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}

{"title":"Compressor refrigerating machine for soil thermal stabilization systems","authors":"V. S. Evdokimov, E. A. Zhukova, A. A. Kapelukhovskaya, V. Maximenko","doi":"10.1063/1.5122099","DOIUrl":"https://doi.org/10.1063/1.5122099","url":null,"abstract":"At this time, the most promising solution capable of solving such a task as the influence of factors on the stability of permafrost soils is the use of soil thermal stabilization systems. To solve this problem, you need to develop a device to maintain the required temperature. This paper discusses the use of a chiller for a thermal stabilization system that maintains a given temperature regime in the summer and provides freezing of the soil for the construction period.At this time, the most promising solution capable of solving such a task as the influence of factors on the stability of permafrost soils is the use of soil thermal stabilization systems. To solve this problem, you need to develop a device to maintain the required temperature. This paper discusses the use of a chiller for a thermal stabilization system that maintains a given temperature regime in the summer and provides freezing of the soil for the construction period.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"197 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121300843","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}

{"title":"Application of the formal order analysis method in assessing the degree of compliance of models of three-dimensional objects","authors":"A. Fakhrudinov, D. Tyunkov, A. Gritsay, V. Ventsel, I. Chervenchuk, A. Blokhin","doi":"10.1063/1.5122146","DOIUrl":"https://doi.org/10.1063/1.5122146","url":null,"abstract":"As part of this work, a non-geometric study was conducted, i.e. abstracted from the geometric nature of the source data. A method for assessing the degree of conformity of three-dimensional objects using formal order was formulated for constructing a sign sequence or text based on the voxel representation of the original 3D objects, the production premises of the refinery, as well as testing it, in order to investigate its applicability to further assess the degree of similarity between three-dimensional objects.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128260900","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}

{"title":"Experimental research of horizontal air cooling apparatus","authors":"N. Y. Fil’kin, E. V. Yakovleva, V. Yusha","doi":"10.1063/1.5122111","DOIUrl":"https://doi.org/10.1063/1.5122111","url":null,"abstract":"The article considers horizontal air cooling apparatus (abbreviated - ACA), analyzes their shortcomings from the point of view of the gasdynamic imperfection of the flow part through the cooling air, suggests ways to solve this problem by installing special guides. To evaluate the proposed solutions, an experimental stand was designed and constructed, and experimental researches of ACA were conducted with three variants of the flow part. An increase in efficiency is achieved when installing concentric guides in part of a deeper lowering the temperature of the cooled stream and reducing the energy consumption of the fans. An economic evaluation of the proposal for the modernization of the flow part of the ACA has been carried out; a positive economic effect has been revealed from the use of guides.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121329365","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}

{"title":"Assessment of the relationship between the law of motion of the slow-speed long-stroke stage piston and the characteristics of the compressor unit drive","authors":"V. Yusha, S. Busarov, A. V. Nedovenchanchanyi","doi":"10.1063/1.5122054","DOIUrl":"https://doi.org/10.1063/1.5122054","url":null,"abstract":"The paper presents the theoretical studies of the impact of the ratio between «compression-discharge» time (forward stoke) and «suction – reverse expansion» time (reverse stroke) on the instantaneous power of the slow-speed long-stroke compressor stage. The influence of the operating mode on the main external characteristics of the compressor unit drive has been evaluated.The paper presents the theoretical studies of the impact of the ratio between «compression-discharge» time (forward stoke) and «suction – reverse expansion» time (reverse stroke) on the instantaneous power of the slow-speed long-stroke compressor stage. The influence of the operating mode on the main external characteristics of the compressor unit drive has been evaluated.","PeriodicalId":377067,"journal":{"name":"NANOSCIENCE AND NANOTECHNOLOGY: NANO-SciTech","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134467589","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}