Herald of the Bauman Moscow State Technical University. Series Natural Sciences最新文献_第4页

Justification of the Application of the Lost-Wax Casting Method in Order-Based Multi-Nomenclature Production 失蜡铸造法在基于订单的多名称生产中的应用论证

Herald of the Bauman Moscow State Technical University. Series Natural Sciences Pub Date : 2023-06-01 DOI: 10.18698/0236-3941-2023-2-47-60

V. Dolgov, P. Nikishechkin, N. Dolgov

{"title":"Justification of the Application of the Lost-Wax Casting Method in Order-Based Multi-Nomenclature Production","authors":"V. Dolgov, P. Nikishechkin, N. Dolgov","doi":"10.18698/0236-3941-2023-2-47-60","DOIUrl":"https://doi.org/10.18698/0236-3941-2023-2-47-60","url":null,"abstract":"It proposes classification of the manufactured wax models based on using standard and special technological equipment, i.e., the molds. Two groups of wax models were formed: unique and universal. The lost-wax casting method of models produced by a combined method that included production of the universal wax models in standard molds and unique ones --- by the method of additive technologies appeared to obtain significant application potential in the demonstrative multi-nomenclature production. Time relationships in the technological cycles of lost-wax casting obtained by the traditional method in molds and the combined method are revealed. Calculations of technological cycles for manufacturing the lost-wax castings by traditional and combined methods are provided. Ambiguity in selection of the manufacturing method for different batches of castings is shown due to the ratio of the technological preparation duration in production of the unique wax models, manufacture in the molds and printing. It is demonstrated that to produce a batch of 1100 castings, it is rational to obtain wax models using the combined method; however, for a batch of 1200 castings, it is rational to obtain universal and unique wax models using the traditional method in the molds. Cyclograms are provided for the casting batches under consideration. Main criteria for selecting a method for obtaining wax models in the demonstrative multi-nomenclature production are described","PeriodicalId":12961,"journal":{"name":"Herald of the Bauman Moscow State Technical University. Series Natural Sciences","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87133253","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}

引用次数: 0

The Concept of Constructing a Stand to Test the SpaceWire Onboard Equipment with Possibility of Software and Hardware Simulation of Reconfigurable Topology of the Spacecraft Onboard Network 基于对星载网络可重构拓扑进行软硬件仿真的可能性，构建SpaceWire星载设备测试台架的构想

Herald of the Bauman Moscow State Technical University. Series Natural Sciences Pub Date : 2023-06-01 DOI: 10.18698/0236-3941-2023-2-4-14

A.S. Maksyutin, A. Murygin

{"title":"The Concept of Constructing a Stand to Test the SpaceWire Onboard Equipment with Possibility of Software and Hardware Simulation of Reconfigurable Topology of the Spacecraft Onboard Network","authors":"A.S. Maksyutin, A. Murygin","doi":"10.18698/0236-3941-2023-2-4-14","DOIUrl":"https://doi.org/10.18698/0236-3941-2023-2-4-14","url":null,"abstract":"The paper presents results of developing a concept of the stand for complex testing of the SpaceWire onboard equipment and its block diagram with detailed description of the components. General stand functionality is described. It is divided into two main groups: autonomous testing of the SpaceWire onboard equipment provided by the stand component, i.e., the terminal device autonomous testing unit, and testing of the information interaction of the constructed network topology provided by the network switching environment simulator units and the network terminal units simulators. The basic principle is described in detail, due to which information in the constructed network topology is interacting in hardware and software simulation on the stand. The main development feature is considered consisting in the possibility of scaling the stand components and making it possible to reconfigure the network topology depending on the task to solve --- constructing a specific model of the spacecraft onboard network. Examples of the stand possible configuration are provided with different number of the simulated on-board network nodes and switches, as well as description of the implemented stand part and practical application with the SpaceWire equipment","PeriodicalId":12961,"journal":{"name":"Herald of the Bauman Moscow State Technical University. Series Natural Sciences","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76719914","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}

引用次数: 0

On Improvement of Evaporator Characteristics for the Beet Pump Low-Temperature Drying 甜菜泵低温干燥蒸发器特性改进研究

Herald of the Bauman Moscow State Technical University. Series Natural Sciences Pub Date : 2023-06-01 DOI: 10.18698/0236-3941-2023-2-83-97

R. A. Zhlobo, M. V. Shamarov, E. Stepanova, A.S. Zaytsev

{"title":"On Improvement of Evaporator Characteristics for the Beet Pump Low-Temperature Drying","authors":"R. A. Zhlobo, M. V. Shamarov, E. Stepanova, A.S. Zaytsev","doi":"10.18698/0236-3941-2023-2-83-97","DOIUrl":"https://doi.org/10.18698/0236-3941-2023-2-83-97","url":null,"abstract":"A method was developed for thermal and structural calculation of the low-temperature plant air cooler designed for drying the beet pulp. Efficiency of the air cooler operation with moisture falling on the heat exchange surface, as well as optimization of the air cooler structural layout, were evaluated. The low-temperature drying plant productivity, for which the air cooler was designed, was taken equal to 21.4 kg/s of wet beet pulp (according to the drum dryer standard nomenclature). Length of the heat exchange surface was calculated through the pipes’ pitch along the front and depth, as well as the cooling capacity, on which basis the airflow was obtained making it possible to determine the device free section and the total length of the air cooler. Using these data, it becomes possible to effectively arrange and select equipment of the required overall dimensions. Nusselt and Reynolds criteria, heat transfer coefficient to the air cooler clean surface, reduced heat transfer coefficient, efficiency coefficients of the fin and of the heat transfer with freon boiling in the pipe, conditional heat transfer coefficient, as well as the wall temperature value, specific heat flux, moisture loss on the evaporator surface, heat transfer coefficient and device aerodynamic resistance in air were calculated","PeriodicalId":12961,"journal":{"name":"Herald of the Bauman Moscow State Technical University. Series Natural Sciences","volume":"161 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83171177","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}

引用次数: 0

Influence of Friction and Elastic Shape Recovery on the Development of Corrugations under Oblique Plate Compression in Die Tooling 摩擦和弹性形状恢复对模具斜板压缩下波纹发展的影响

Herald of the Bauman Moscow State Technical University. Series Natural Sciences Pub Date : 2023-06-01 DOI: 10.18698/0236-3941-2023-2-61-72

V. Tarasov, V. Baskakov, D. Boyarskiy, N. V. Gerasimov, M. A. Baburin, K. A. Karnaukhov

{"title":"Influence of Friction and Elastic Shape Recovery on the Development of Corrugations under Oblique Plate Compression in Die Tooling","authors":"V. Tarasov, V. Baskakov, D. Boyarskiy, N. V. Gerasimov, M. A. Baburin, K. A. Karnaukhov","doi":"10.18698/0236-3941-2023-2-61-72","DOIUrl":"https://doi.org/10.18698/0236-3941-2023-2-61-72","url":null,"abstract":"Reshaping the corner-shaped parts is an urgent technical problem making it possible to provide wall thickening at the top by compressing the artificially created excess metal in the shelves of the semi-finished product. However, shelf compression is accompanied by formation of the corrugations, which are partially deflected by the die planes and remain in the waviness form after the load is removed. Regularities in the corrugations development during the shelves’ compression were established and primarily dependence on the friction forces acting on the die boundary surfaces, which is necessary to comply with the requirements to the workpiece shelves waviness. The workpiece shelves’ compression was simulated by compression of a plate placed obliquely in the die cavity. It is shown that the number of corrugations increases with the compression stress growth. The corrugations amplitude also increases during compression. When corrugations and die walls are in contiguity, contact stresses and friction forces act on the deformable plate. This shields the compression force action in the plate behind the contact point. Localization of deformations in the area in front of the contact point contributes to an increase in the thickness of the angle-shaped workpiece during reshaping. It was established that the residual waviness was non-uniform over the plate, and was associated with the deformation area localization, and was proportional to the initial gap","PeriodicalId":12961,"journal":{"name":"Herald of the Bauman Moscow State Technical University. Series Natural Sciences","volume":"48 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86067944","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}

引用次数: 0

Energy and Exergy Analysis on Spark Ignition Engines under Varying Ignition Timing with Pure Bioethanol Fuel 纯生物乙醇燃料下不同点火时间下火花点火发动机能量与火用分析

Herald of the Bauman Moscow State Technical University. Series Natural Sciences Pub Date : 2023-04-01 DOI: 10.18698/1812-3368-2023-2-140-159

M. Paloboran, H. Syam, M. Yahya, Jamaluddin

{"title":"Energy and Exergy Analysis on Spark Ignition Engines under Varying Ignition Timing with Pure Bioethanol Fuel","authors":"M. Paloboran, H. Syam, M. Yahya, Jamaluddin","doi":"10.18698/1812-3368-2023-2-140-159","DOIUrl":"https://doi.org/10.18698/1812-3368-2023-2-140-159","url":null,"abstract":"The first and second laws of thermodynamics analysis used to show the rate of energy and exergy as a performance of SI-PFI engine with the variation of fuel ignition between 10 and 26 BTDC (before top dead Centre) at interval 4 BTDC. The engine was performed on eight levels of speed in intervals 2000--8000 RPM (increment of 1000 RPM) with pure bioethanol fuel (E100) and 13:1 of compression ratio. The effect of fuel ignition on energy and exergy analysis of E100 fuel will be compared with E0 as reference fuel that performed in 11:1 of compression ratio and 10 BTDC. The results show that the maximum efficiency of energy and exergy for the E100 are 46.59 and 41.90 % at 18 BTDC and 6000 RPM. Meanwhile, the maximum efficiency of energy and exergy for E0 were 43.33 and 31.76 % at 5000 RPM. Moreover, the minimum BSFC for the E100 is 0.2867 kg/(kW•h) at 6000 RPM and 18 BTDC while for the E0 is 0.1960 kg/(kW•h) at 5000 RPM. These results indicate that E100 is more effectivein transferring heat into useful work although it is 30 % more wasteful than E0","PeriodicalId":12961,"journal":{"name":"Herald of the Bauman Moscow State Technical University. Series Natural Sciences","volume":"54 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77613189","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}

引用次数: 0

Study of the Synthesis Process and Properties of the Vanadium Pentoxide Nanoparticles 五氧化二钒纳米颗粒的合成工艺及性能研究

Herald of the Bauman Moscow State Technical University. Series Natural Sciences Pub Date : 2023-04-01 DOI: 10.18698/1812-3368-2023-2-126-139

O. Yarovaya, Yu. M. Averina, R. Magzhanov, B. Karetkin, V. I. Panfilov, V. Boldyrev

{"title":"Study of the Synthesis Process and Properties of the Vanadium Pentoxide Nanoparticles","authors":"O. Yarovaya, Yu. M. Averina, R. Magzhanov, B. Karetkin, V. I. Panfilov, V. Boldyrev","doi":"10.18698/1812-3368-2023-2-126-139","DOIUrl":"https://doi.org/10.18698/1812-3368-2023-2-126-139","url":null,"abstract":"The paper presents results of studying the possibility of synthesizing aqueous dispersions of the vanadium (V) oxide nanoparticles that retain aggregative stability for a long period. The experiments performed resulted in obtaining tubular nanoparticles of the vanadium pentoxide (V2O5) 50 µm long and 5--10 nm in diameter. Wall thickness of the obtained tubes was 1.1 nm. It was experimentally established that type of the acid used was not affecting the resulting nanoparticles size, but was significantly effecting the shelf life. To increase the nanoparticles optimal shelf life, it is proposed to use the hydrochloric acid solutions as the peptizing agent. This method made it possible not only to increase the system stability, but also to raise the nanoparticles concentration up to 1 % of the mass. In the framework of experiments on studying the obtained particles surface characteristics, it was found that nanoparticles in the range of pH = 3.0--4.2 were negatively charged, and aggregation stability was mainly determined by the electrostatic factor. The proposed chemical technology could be used in industrial production of the vanadium pentoxide nanoparticles in various industries","PeriodicalId":12961,"journal":{"name":"Herald of the Bauman Moscow State Technical University. Series Natural Sciences","volume":"213 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72831721","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}

引用次数: 0

Kinetics of Molybdenum Trioxide Dissolution in the Alkaline Medium 三氧化钼在碱性介质中的溶解动力学

Herald of the Bauman Moscow State Technical University. Series Natural Sciences Pub Date : 2023-04-01 DOI: 10.18698/1812-3368-2023-2-98-109

E. Eliseeva, S. Berezina, I. Gorichev

{"title":"Kinetics of Molybdenum Trioxide Dissolution in the Alkaline Medium","authors":"E. Eliseeva, S. Berezina, I. Gorichev","doi":"10.18698/1812-3368-2023-2-98-109","DOIUrl":"https://doi.org/10.18698/1812-3368-2023-2-98-109","url":null,"abstract":"The paper presents experimental study results of the MoO3 powder samples dissolution kinetics in the aqueous ammonia solution at various pH concentrations and values. Molybdenum ions concentration in the filtrate samples was determined spectrophotometrically. Kinetic characteristics were obtained, and kinetic parameters (specific dissolution rate, reaction order with respect to the H+ ion) were calculated. It was established that the dissolution rate was increasing in the ammonia solution concentration range of 0.02--1.26 mol/l, and with the growing pH it passed through the maximum. Taking into account the acid-base equilibria constants, the dissolution process was simulated, and its stage-by-stage nature was established. Fractional reaction order with respect to the H+ ions calculated from the curves plotted in the α--t/t0.5 coordinates (affine transformation method) indicated the adsorption mechanism of dissolution. It was shown that the MoO3 dissolution proceeded with formation of the intermediate adsorption complexes. Due to the HMoO4- low concentration in the MoO3 concentration within the studied pH range by the surface-active particle, on which groups of ions were adsorbed, the MoO4- could be considered. The results obtained are an addition to the data possessed on the molybdenum oxide phase and other transitional metals behavior. They could be applied in the practical applications associated with dissolving molybdenum in the alkaline electrolytes","PeriodicalId":12961,"journal":{"name":"Herald of the Bauman Moscow State Technical University. Series Natural Sciences","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89069613","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}

引用次数: 0

Polyacrylonitrile-Based Composite Carbon Nanofibers with Tailored Microporosity 具有定制微孔度的聚丙烯腈基复合纳米碳纤维

Herald of the Bauman Moscow State Technical University. Series Natural Sciences Pub Date : 2023-04-01 DOI: 10.18698/1812-3368-2023-2-160-172

E. S. Vtyurina, I. Ponomarev, A. G. Buyanovskaya, I. I. Ponomarev, K. Skupov

{"title":"Polyacrylonitrile-Based Composite Carbon Nanofibers with Tailored Microporosity","authors":"E. S. Vtyurina, I. Ponomarev, A. G. Buyanovskaya, I. I. Ponomarev, K. Skupov","doi":"10.18698/1812-3368-2023-2-160-172","DOIUrl":"https://doi.org/10.18698/1812-3368-2023-2-160-172","url":null,"abstract":"Carbon nanofibers are currently used in many applications including electrochemical power sources, particularly, fuel cells. Their properties are highly dependent on the micro- and mesoporous structure. Here we provide a porosimetric analysis of the polyacrylonitrile-based electrospun composite Zr- and Ni-containing carbon nanofiber mats by N2 and CO2 adsorption methods for the first time. It was found that pyrolysis temperature affects specific surface area and volume: the values increase for the sample pyrolyzed at 900 °C compared with the initial stabilized nanofibers (300 °C, air) according to the Dubinin --- Radushkevich, non-local density functional theory (NLDFT) and grand canonical Monte-Carlo methods (GCMC). For higher pyrolysis temperatures (1000 and 1200 °C), the porosimetric parameters decrease compared with the one pyrolyzed at 900 °C. According to the NLDFT and GCMC pore size distribution, the difference for pyrolyzed samples is mostly related to a sharp decrease in the specific surface area for pores with a size of ~ 0.5 nm and an increase for pores at 0.55--0.8 nm compared with the initial stabilized sample. The study demonstrates a way to adjust porosimetric parameters depending on the pyrolysis conditions of the nanofiber mats, since it can improve characteristics of such type of carbon materials in electrochemical devices","PeriodicalId":12961,"journal":{"name":"Herald of the Bauman Moscow State Technical University. Series Natural Sciences","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88285716","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}

引用次数: 0

Study of the Principal Components Method Modifications Resistance to Abnormal Observations 主成分法修正抗异常观测的研究

Herald of the Bauman Moscow State Technical University. Series Natural Sciences Pub Date : 2023-04-01 DOI: 10.18698/1812-3368-2023-2-17-34

V. Goryainov, E. Goryainova

{"title":"Study of the Principal Components Method Modifications Resistance to Abnormal Observations","authors":"V. Goryainov, E. Goryainova","doi":"10.18698/1812-3368-2023-2-17-34","DOIUrl":"https://doi.org/10.18698/1812-3368-2023-2-17-34","url":null,"abstract":"The paper considers the problem of reducing multidimensional correlated indicators. One of the approaches to solving this problem is based on the method of principal components, which makes it possible to compactly describe the vector with correlated coordinates (components) using the principal components vector with uncorrelated coordinates of much smaller dimension, while retaining most of the information about correlation structure of the original vector. On simulated and real data, several modifications of the principal components method were compared differing in the method of evaluating correlation matrix of the observation vector. The work objective is to demonstrate advantages of the robust modifications of the principal components method in cases, where data contained the abnormal values. To compare the considered modifications on the model data, metric was introduced that measured the difference between estimated and true eigenvalues of the initial data correlation matrix. This metric behavior depending on the probability distribution of observations was studied by computer simulation. As the distributions, multivariate distributions with the off-diagonal correlation matrices simulating a polluted sample were selected. Next, a sample of 13 correlated socioeconomic indicators for 85 countries was considered, where 46 abnormal values were identified. The considered modifications of the principal components method chose the same optimal number of principal components equal to three. However, the real data compression quality, which was defined as the share of the initial indicators total variance described by the first three principal components, turned out to be significantly higher for the robust modifications of the principal components method. Results obtained on these real data are in good agreement with conclusions of the computer simulation","PeriodicalId":12961,"journal":{"name":"Herald of the Bauman Moscow State Technical University. Series Natural Sciences","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78647764","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}

引用次数: 0

Luminescence Intensity ELF Oscillations from a Polymer Membrane in the Aqueous Salt Solutions 盐水溶液中聚合物膜的发光强度ELF振荡

Herald of the Bauman Moscow State Technical University. Series Natural Sciences Pub Date : 2023-04-01 DOI: 10.18698/1812-3368-2023-2-50-82

N. Bunkin, S. V. Bashkin, P. N. Bolotskova, S. Gudkov, V. A. Kozlov

{"title":"Luminescence Intensity ELF Oscillations from a Polymer Membrane in the Aqueous Salt Solutions","authors":"N. Bunkin, S. V. Bashkin, P. N. Bolotskova, S. Gudkov, V. A. Kozlov","doi":"10.18698/1812-3368-2023-2-50-82","DOIUrl":"https://doi.org/10.18698/1812-3368-2023-2-50-82","url":null,"abstract":"The paper studies luminescence from the Nafion polymer membrane surface at its swelling in the isotonic aqueous solutions and bi-distilled water using the experimental photo luminescent spectroscopy. Liquid samples were preliminarily treated with the electric pulses with duration of 1 µs and amplitude of 0.1 V using antenna in the form of a flat capacitor. Experiments in photo luminescent spectroscopy were carried out 20 min after the electric pulse treatment. Typical luminescence intensity dependence on the membrane swelling time could be represented as the exponentially decreasing function. Characteristic decay time of the corresponding functions and stationary level of the membrane luminescence intensity depend on the electrical pulses repetition rate. The obtained dependencies could well be reproduced. However, dependence of the luminescence intensity at certain pulse repetition rates appears to be a random function, and the reproducibility is missing. It could be assumed that these stochastic effects are associated with exposure to random external force of the electromagnetic nature acting on the polymer membrane during swelling. Low-frequency pulsations of neutron stars or white dwarfs are the source of this random force according to the authors of the work. This effect is associated with depolarization during the low-frequency electromagnetic field scattering caused by the neutron stars pulsation. Depolarization effect arises due to scattering on long-living anisotropic clusters of nano-bubbles, which, in turn, are becoming anisotropic in the external field of a flat capacitor. Depolarized scattered radiation causes stochastic oscillations of the polymer fibers unwound into the bulk liquid. In this case, luminescence should also acquire the stochastic character taking into account the effect of resonant luminescence energy transfer from a donor to the luminescence acceptor","PeriodicalId":12961,"journal":{"name":"Herald of the Bauman Moscow State Technical University. Series Natural Sciences","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82828893","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}

引用次数: 0