首页 > 最新文献

Journal of Siberian Federal University: Engineering & Technologies最新文献

英文 中文
Strength of Curvilinearly Reinforced Plates in a Polar Coordinate System 极坐标下曲线加筋板的强度
Pub Date : 2021-12-01 DOI: 10.17516/1999-494x-0365
Y. Nemirovsky
А computer simulation of flat structures to create a fiber composite with curved reinforcement along spiral trajectories in the polar coordinate system has been performed. Numerical comparisons of the reachability of limit states for various reinforcement structures by two families of continuous curved fibers have been made. The calculations take into account the influence of a constant temperature field. In this paper, analytical solutions of the reinforcement intensity function of the differential equation of the constancy of the fiber cross sections for the families of logarithmic and algebraic spirals are found. The analysis of the results shows that due to the choice of curved laying of reinforcing fibers, it is possible to obtain a structure with predetermined properties
А在极坐标系下对平面结构进行了计算机模拟,以形成具有弯曲增强的纤维复合材料沿螺旋轨迹。对两类连续弯曲纤维对不同钢筋结构的极限状态可达性进行了数值比较。计算考虑了恒温场的影响。本文给出了对数和代数螺旋族纤维截面常变性微分方程的钢筋强度函数的解析解。结果分析表明,选择弯曲敷设增强纤维,可以获得具有预定性能的结构
{"title":"Strength of Curvilinearly Reinforced Plates in a Polar Coordinate System","authors":"Y. Nemirovsky","doi":"10.17516/1999-494x-0365","DOIUrl":"https://doi.org/10.17516/1999-494x-0365","url":null,"abstract":"А computer simulation of flat structures to create a fiber composite with curved reinforcement along spiral trajectories in the polar coordinate system has been performed. Numerical comparisons of the reachability of limit states for various reinforcement structures by two families of continuous curved fibers have been made. The calculations take into account the influence of a constant temperature field. In this paper, analytical solutions of the reinforcement intensity function of the differential equation of the constancy of the fiber cross sections for the families of logarithmic and algebraic spirals are found. The analysis of the results shows that due to the choice of curved laying of reinforcing fibers, it is possible to obtain a structure with predetermined properties","PeriodicalId":17206,"journal":{"name":"Journal of Siberian Federal University: Engineering & Technologies","volume":"55 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88496720","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 Influence of Manufacturing Technology on the Properties of Chromium-Bronze Electrodes for Contact Relief Welding of Reinforcing Rods 制造工艺对钢筋接触卸压焊用铬青铜电极性能的影响
Pub Date : 2021-12-01 DOI: 10.17516/1999-494x-0368
Sergei L. Busygin
The article discusses an effective, in comparison with common, technology of manufacturing chromium bronze electrodes for resistance projection welding of reinforcing bars. Within the framework of this technology, a method for preparing a melt with alloying with a multicomponent element, including basic elements, a matrix of copper powder and a filler of nanostructured chromium particles, is considered. The technology is based on a combined molding-plastic deformation process and makes it possible to obtain a finished resistance welding electrode of type D in one operation. The results of microstructural, X‑ray micro-spectral and local energy dispersive (micro) analysis of electrode samples obtained by different technologies, explaining the main nature of the loss of electrode performance, are presented. The results of fractographic studies of the contact surface of the electrodes are considered. Electrical conductivity and mechanical properties were studied for all electrode samples. The results of tests on a resistance welding machine with an assessment of the wear of the electrodes and the reasons for their failure are presented
本文讨论了一种有效的、与常用的钢筋电阻凸焊用铬青铜焊条的制造工艺。在该技术的框架内,考虑了一种用多组分元素(包括基本元素、铜粉基体和纳米结构铬颗粒填料)制备熔体的方法。该技术基于成型-塑性复合变形工艺,可一次加工得到D型电阻焊条成品。介绍了不同技术获得的电极样品的显微结构、X射线微光谱和局部能量色散(micro)分析结果,解释了电极性能损失的主要性质。考虑了电极接触面断口学研究的结果。研究了各电极样品的电导率和力学性能。介绍了电阻焊机的试验结果,并对电极的磨损进行了评估,分析了电极失效的原因
{"title":"The Influence of Manufacturing Technology on the Properties of Chromium-Bronze Electrodes for Contact Relief Welding of Reinforcing Rods","authors":"Sergei L. Busygin","doi":"10.17516/1999-494x-0368","DOIUrl":"https://doi.org/10.17516/1999-494x-0368","url":null,"abstract":"The article discusses an effective, in comparison with common, technology of manufacturing chromium bronze electrodes for resistance projection welding of reinforcing bars. Within the framework of this technology, a method for preparing a melt with alloying with a multicomponent element, including basic elements, a matrix of copper powder and a filler of nanostructured chromium particles, is considered. The technology is based on a combined molding-plastic deformation process and makes it possible to obtain a finished resistance welding electrode of type D in one operation. The results of microstructural, X‑ray micro-spectral and local energy dispersive (micro) analysis of electrode samples obtained by different technologies, explaining the main nature of the loss of electrode performance, are presented. The results of fractographic studies of the contact surface of the electrodes are considered. Electrical conductivity and mechanical properties were studied for all electrode samples. The results of tests on a resistance welding machine with an assessment of the wear of the electrodes and the reasons for their failure are presented","PeriodicalId":17206,"journal":{"name":"Journal of Siberian Federal University: Engineering & Technologies","volume":"228 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75394445","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
Issues of Development of Solar Collectors with High Efficiency 高效太阳能集热器的发展问题
Pub Date : 2021-12-01 DOI: 10.17516/1999-494x-0364
M. Uzbekov
The article deals with the creation of energy-efficient solar water collectors. In order to develop energy-efficient solar water collectors (SWC), methods of rational enhancement of heat transfer in the channels of the collectors are proposed. It is noted that the methods used to increase heat transfer from the collector walls to the water should be tailored to a low-speed flow of the heat carrier. With such flow regimes, the most acceptable ways to enhance heat transfer are: flow swirling, the use of artificial roughness, renewal of the hydrodynamic boundary layer through the creation of an alternating pressure gradient in the flow. The analysis of the conducted research shows that the maximum effects of increasing heat transfer occur in the range of Re numbers from 2000 to 8000, i. e. in the laminar flow region and in the region of underdeveloped turbulence. An efficiency criterion is obtained for the conditions under which enhancers are installed inside the pipes. The criterion determines the ratio of the number of pipes with enhancers to the number of smooth pipes. The calculation is carried out for cases in which the heating capacity, flow rate, power for heat carrier circulation and the pipe diameter of the SWC with smooth pipes are equal to the heating capacity, flow rate, power for heat carrier circulation and pipe diameter of the SWC with the pipes with enhancers. In addition to the specified efficiency criterion of the SWC, a heat transfer comparison formula of the SWC having pipes with enhancers and SWC with smooth pipes is obtained
本文讨论了节能太阳能集水器的研制。为了开发高效节能的太阳能集热器,提出了合理加强集热器通道传热的方法。值得注意的是,用于增加从集热器壁到水的热传递的方法应适合于热载体的低速流动。在这种流动状态下,最可接受的增强传热的方法是:流动旋流,使用人工粗糙度,通过在流动中创造交替压力梯度来更新流体动力边界层。研究结果表明,在2000 ~ 8000雷诺数范围内,即层流区和欠发达湍流区,增加换热的效果最大。得到了在管道内安装增强器的条件下的效率准则。该准则决定了带有增强剂的管道数量与光滑管道数量的比率。在光滑管道的SWC的热容量、流量、热载体循环功率和管径等于带增强剂管道的SWC的热容量、流量、热载体循环功率和管径的情况下进行计算。在此基础上,推导出了带增强剂管道的SWC与带光滑管道的SWC的传热比较公式
{"title":"Issues of Development of Solar Collectors with High Efficiency","authors":"M. Uzbekov","doi":"10.17516/1999-494x-0364","DOIUrl":"https://doi.org/10.17516/1999-494x-0364","url":null,"abstract":"The article deals with the creation of energy-efficient solar water collectors. In order to develop energy-efficient solar water collectors (SWC), methods of rational enhancement of heat transfer in the channels of the collectors are proposed. It is noted that the methods used to increase heat transfer from the collector walls to the water should be tailored to a low-speed flow of the heat carrier. With such flow regimes, the most acceptable ways to enhance heat transfer are: flow swirling, the use of artificial roughness, renewal of the hydrodynamic boundary layer through the creation of an alternating pressure gradient in the flow. The analysis of the conducted research shows that the maximum effects of increasing heat transfer occur in the range of Re numbers from 2000 to 8000, i. e. in the laminar flow region and in the region of underdeveloped turbulence. An efficiency criterion is obtained for the conditions under which enhancers are installed inside the pipes. The criterion determines the ratio of the number of pipes with enhancers to the number of smooth pipes. The calculation is carried out for cases in which the heating capacity, flow rate, power for heat carrier circulation and the pipe diameter of the SWC with smooth pipes are equal to the heating capacity, flow rate, power for heat carrier circulation and pipe diameter of the SWC with the pipes with enhancers. In addition to the specified efficiency criterion of the SWC, a heat transfer comparison formula of the SWC having pipes with enhancers and SWC with smooth pipes is obtained","PeriodicalId":17206,"journal":{"name":"Journal of Siberian Federal University: Engineering & Technologies","volume":"71 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83862576","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
Integral Indicator of the Efficiency Assessment and Energy Saving Potential in the Municipal Public Sector 市政公共部门效率评价与节能潜力综合指标研究
Pub Date : 2021-12-01 DOI: 10.17516/1999-494x-0360
Eugenia Yu. Sizganova
The paper presents a method to assess the efficiency and the potential of energy saving in the municipal public sector on the example of the network of Krasnoyarsk municipal educational institutions. It is performed according to criteria expressions based on the law of optimal formation of technocenosis by comparing two integral indicators, one of them characterizes a positive effect, and another one expresses costs
本文以克拉斯诺亚尔斯克市教育机构网络为例,提出了一种评估市政公共部门节能效率和潜力的方法。根据技术优势最优形成规律,通过比较两个整体指标,其中一个指标表示积极效果,另一个指标表示成本,按照标准表达式进行
{"title":"Integral Indicator of the Efficiency Assessment and Energy Saving Potential in the Municipal Public Sector","authors":"Eugenia Yu. Sizganova","doi":"10.17516/1999-494x-0360","DOIUrl":"https://doi.org/10.17516/1999-494x-0360","url":null,"abstract":"The paper presents a method to assess the efficiency and the potential of energy saving in the municipal public sector on the example of the network of Krasnoyarsk municipal educational institutions. It is performed according to criteria expressions based on the law of optimal formation of technocenosis by comparing two integral indicators, one of them characterizes a positive effect, and another one expresses costs","PeriodicalId":17206,"journal":{"name":"Journal of Siberian Federal University: Engineering & Technologies","volume":"97 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86167104","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
Electrolytic Processing of Pb-Bi Alloy 铅铋合金的电解加工
Pub Date : 2021-12-01 DOI: 10.17516/1999-494x-0362
A. A. Korolev
Metal bismuth is mainly produced as a by-product in the production of lead, tungsten, copper, silver, gold, tin and zinc. Approximately 90 % of all extracted bismuth is obtained from lead, copper and other concentrates. The main source of bismuth is lead concentrates obtained during the processing of lead, as well as lead-zinc and other polymetallic ores. During the processing of these concentrates, bismuth almost completely enters the rough lead, from which it is removed during its refining. The most common technologies for the recovery of bismuth from lead ingots are the Kroll-Betterton process and the Betts electrolytic process. During the electrolysis of the Bi-Pb alloy, the separation of three products has been established, they are anode and cathode alloys, as well as salt melt. The complexity of pyroelectrometallurgical processing of a bismuth-poor alloy with the production of rough bismuth in one stage is confirmed, which necessitates the use of two stages of electrolysis. At the first stage of electrolysis, the anode product‑1 (17.3–48.5 % of the initial Pb-Bi alloy) of the composition has been isolated,%: 16.6–48.4 Bi; 51.4–83.2 Pb; operational extraction,%: 92.2–96.6 Bi; 9.8–44.4 Pb; main phases Bi0,3Pb0,7 and Bi0,95Pb0,05. A six-fold bismuth enrichment is achieved in the anode product. At the second stage of electrolysis of the previously isolated anode product of the composition,%: 26.7 Bi; 73.1 Pb; 0.13 Cu; 0.08 Zn, the anode product‑2 (28.1 % of the enriched Pb-Bi alloy) of the composition has been separated,%: 93.6 Bi; 4.1 Pb; 0.086 Ag; 0.0066 As; 0.006 Sb; 0.0013 Cu; 0.001 Sn; 0.0014 Zn; stage extraction,%: 98.6 Bi; 1.6 Pb; main phase Bi0,95Pb0,05. As a result of pyroelectrometallurgical processing of a Pb-Bi alloy (~10 % Bi) with anode polarization in two stages, an anode product (8.7 % of the initial alloy) of the composition has been isolated,%: ≥ 93.6 Bi; 4.1 Pb; extraction from the initial alloy,%: 93.0 Bi; 0.4 Pb has been obtained. The following modes are recommended for pyroelectrometallurgical processing in two stages of Pb-Bi alloy: process temperature 550–600 °C; anode current density: 0.5 A/cm2 at the first stage; 0.2–0.3 A/cm2 at the second stage; cathode current density: 1.5 A/cm2 at the first stage; 1.0 A/cm2 at the second stage; operating voltage on the tub: at the first stage 8–12 V; at the second stage 5–8 V; the composition of the electrolyte at both stages,%: 7 NaCl; 35 KCl; 18 PbCl2; 40 ZnCl2; the amount of electrolyte output for processing: at the first stage – 10 % of the mass of the Pb-Bi alloy after alkaline treatment; at the second stage – 10 % of the mass of the anode product of the first stage
金属铋主要是铅、钨、铜、银、金、锡和锌生产过程中的副产品。大约90%的铋是从铅、铜和其他精矿中获得的。铋的主要来源是铅加工过程中获得的铅精矿,以及铅锌和其他多金属矿石。在这些精矿的加工过程中,铋几乎完全进入粗铅,在精炼过程中从粗铅中除去。从铅锭中回收铋最常用的技术是Kroll-Betterton法和Betts电解法。在电解过程中,建立了三种产物的分离,即阳极、阴极合金和盐液。证实了贫铋合金一段制得粗铋的热电冶金工艺的复杂性,需要采用两段电解。在电解的第一阶段,阳极产物- 1(17.3 - 48.5%的初始Pb-Bi合金)的组成已被分离,%:16.6-48.4 Bi;51.4 - -83.2 Pb;操作萃取,%:92.2-96.6 Bi;9.8 - -44.4 Pb;主要相Bi0,3Pb0,7和Bi0,95Pb0,05。在阳极产物中实现了6倍的铋富集。在电解的第二阶段,先前隔离的阳极产物的组成,%:26.7 Bi;73.1 Pb;0.13铜;0.08 Zn,阳极产物‑2(富集Pb-Bi合金的28.1%)的成分已分离,%:93.6 Bi;4.1 Pb;0.086 Ag);0.0066;0.006某人;0.0013铜;0.001锡;0.0014锌;阶段萃取,%:98.6 Bi;1.6 Pb;主相Bi0,95Pb0,05;对一种Pb-Bi合金(~ 10% Bi)进行了两段阳极极化热电冶金处理,分离出了该成分的阳极产物(占初始合金的8.7%),%:≥93.6 Bi;4.1 Pb;从初始合金中萃取,%:93.0 Bi;得到了0.4 Pb。Pb-Bi合金两个阶段的热电冶金加工推荐采用以下模式:工艺温度550-600℃;阳极电流密度:第一级0.5 A/cm2;第二级0.2-0.3 A/cm2;阴极电流密度:第一级1.5 A/cm2;第二级1.0 A/cm2;盆上工作电压:第一级8 - 12v;第二级5 ~ 8v;两段电解液的组成,%:7 NaCl;35氯化钾;18 PbCl2;40优化选取;加工用电解液的输出量:第一阶段-碱性处理后铅铋合金质量的10%;在第二级-第一级阳极产品质量的10%
{"title":"Electrolytic Processing of Pb-Bi Alloy","authors":"A. A. Korolev","doi":"10.17516/1999-494x-0362","DOIUrl":"https://doi.org/10.17516/1999-494x-0362","url":null,"abstract":"Metal bismuth is mainly produced as a by-product in the production of lead, tungsten, copper, silver, gold, tin and zinc. Approximately 90 % of all extracted bismuth is obtained from lead, copper and other concentrates. The main source of bismuth is lead concentrates obtained during the processing of lead, as well as lead-zinc and other polymetallic ores. During the processing of these concentrates, bismuth almost completely enters the rough lead, from which it is removed during its refining. The most common technologies for the recovery of bismuth from lead ingots are the Kroll-Betterton process and the Betts electrolytic process. During the electrolysis of the Bi-Pb alloy, the separation of three products has been established, they are anode and cathode alloys, as well as salt melt. The complexity of pyroelectrometallurgical processing of a bismuth-poor alloy with the production of rough bismuth in one stage is confirmed, which necessitates the use of two stages of electrolysis. At the first stage of electrolysis, the anode product‑1 (17.3–48.5 % of the initial Pb-Bi alloy) of the composition has been isolated,%: 16.6–48.4 Bi; 51.4–83.2 Pb; operational extraction,%: 92.2–96.6 Bi; 9.8–44.4 Pb; main phases Bi0,3Pb0,7 and Bi0,95Pb0,05. A six-fold bismuth enrichment is achieved in the anode product. At the second stage of electrolysis of the previously isolated anode product of the composition,%: 26.7 Bi; 73.1 Pb; 0.13 Cu; 0.08 Zn, the anode product‑2 (28.1 % of the enriched Pb-Bi alloy) of the composition has been separated,%: 93.6 Bi; 4.1 Pb; 0.086 Ag; 0.0066 As; 0.006 Sb; 0.0013 Cu; 0.001 Sn; 0.0014 Zn; stage extraction,%: 98.6 Bi; 1.6 Pb; main phase Bi0,95Pb0,05. As a result of pyroelectrometallurgical processing of a Pb-Bi alloy (~10 % Bi) with anode polarization in two stages, an anode product (8.7 % of the initial alloy) of the composition has been isolated,%: ≥ 93.6 Bi; 4.1 Pb; extraction from the initial alloy,%: 93.0 Bi; 0.4 Pb has been obtained. The following modes are recommended for pyroelectrometallurgical processing in two stages of Pb-Bi alloy: process temperature 550–600 °C; anode current density: 0.5 A/cm2 at the first stage; 0.2–0.3 A/cm2 at the second stage; cathode current density: 1.5 A/cm2 at the first stage; 1.0 A/cm2 at the second stage; operating voltage on the tub: at the first stage 8–12 V; at the second stage 5–8 V; the composition of the electrolyte at both stages,%: 7 NaCl; 35 KCl; 18 PbCl2; 40 ZnCl2; the amount of electrolyte output for processing: at the first stage – 10 % of the mass of the Pb-Bi alloy after alkaline treatment; at the second stage – 10 % of the mass of the anode product of the first stage","PeriodicalId":17206,"journal":{"name":"Journal of Siberian Federal University: Engineering & Technologies","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78253471","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: 1
Machine Learning Approach to Simulation of Continuous Seeded Crystallization of Gibbsite 用机器学习方法模拟三水铝石连续结晶过程
Pub Date : 2021-12-01 DOI: 10.17516/1999-494x-0366
V. Golubev
Continuous seeded crystallization is characterized by oscillations of particle size distribution (PSD) and liquor productivity. To describe these oscillations using analytical methods is a complicated task due to non-linearity and slow response of the process. This paper uses a statistical approach to the preparation of initial data, determination of the significant factors and arrangement of the said factors by their impact on the dynamics of crystal population development. Various methods of machine learning were analyzed to develop a model capable of forecasting the time series of particle size distribution and composition of the final solution. The paper proposes to use deep learning methods for predicting the distribution of crystals by grades and liquor productivity. Such approach has never been used for these purposes before. The study shows that models based on long short-term memory (LSTM) cells provide for better accuracy with less trainable parameters as compared with other multilayer neural networks. Training of the models and the assessment of their quality are performed using the historical data collected in the hydrate crystallization area at the operating alumina refinery
连续种子结晶的特点是粒度分布(PSD)和白酒生产率的振荡。由于过程的非线性和缓慢响应,用解析方法描述这些振荡是一项复杂的任务。本文采用统计方法准备初始数据,确定重要因素,并根据这些因素对晶体种群发展动态的影响对这些因素进行排序。分析了各种机器学习方法,以开发能够预测最终溶液粒度分布和组成的时间序列的模型。本文建议使用深度学习方法来预测按等级和白酒产量的晶体分布。这种方法以前从未用于这些目的。研究表明,与其他多层神经网络相比,基于长短期记忆(LSTM)细胞的模型在可训练参数较少的情况下提供了更好的准确性。使用在运行的氧化铝精炼厂的水合物结晶区收集的历史数据对模型进行训练并对其质量进行评估
{"title":"Machine Learning Approach to Simulation of Continuous Seeded Crystallization of Gibbsite","authors":"V. Golubev","doi":"10.17516/1999-494x-0366","DOIUrl":"https://doi.org/10.17516/1999-494x-0366","url":null,"abstract":"Continuous seeded crystallization is characterized by oscillations of particle size distribution (PSD) and liquor productivity. To describe these oscillations using analytical methods is a complicated task due to non-linearity and slow response of the process. This paper uses a statistical approach to the preparation of initial data, determination of the significant factors and arrangement of the said factors by their impact on the dynamics of crystal population development. Various methods of machine learning were analyzed to develop a model capable of forecasting the time series of particle size distribution and composition of the final solution. The paper proposes to use deep learning methods for predicting the distribution of crystals by grades and liquor productivity. Such approach has never been used for these purposes before. The study shows that models based on long short-term memory (LSTM) cells provide for better accuracy with less trainable parameters as compared with other multilayer neural networks. Training of the models and the assessment of their quality are performed using the historical data collected in the hydrate crystallization area at the operating alumina refinery","PeriodicalId":17206,"journal":{"name":"Journal of Siberian Federal University: Engineering & Technologies","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74690164","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
Statistical Multimode Accounting in the Problem of Optimal Reactive Load Compensation when Constructing Smart Grids 智能电网无功最优补偿问题中的统计多模计算
Pub Date : 2021-12-01 DOI: 10.17516/1999-494x-0359
A. Gerasimenko
The article deals with the development prospects for smart grids. An approach to optimizing the modes of electric power systems in terms of reactive power is presented in detail. The solution of this problem considers the multimodality, determination of the integral characteristics of the modes, etc. Analytical modeling of load changes by means of the method of factor analysis allows to reduce the amount of information drastically without a significant loss of the accuracy of the obtained solutions. For this purpose, the actually correlated electrical loads of various nodes of electric power systems are represented in the form of a linear combination of independent random variables, namely, generalized load graphs. It is shown that the inclusion of multimode by orthogonal graphs results in a significant simplification of the solution of multimode problems. The choice of the dependent and independent variables composition when solving the optimization problem with the power consumption modes has a fundamental effect both on the modeling of constraints, the formation of the reduced gradient and the main calculation expressions, and on the speed of the optimization search as a whole
本文论述了智能电网的发展前景。详细介绍了一种基于无功功率的电力系统模式优化方法。该问题的求解考虑了多模态、模态积分特性的确定等问题。利用因子分析方法对负荷变化进行分析建模,可以大幅度地减少信息量,而不会大大降低所得到的解的准确性。为此,将电力系统各节点实际相关的电力负荷用独立随机变量的线性组合形式表示,即广义负荷图。结果表明,用正交图包含多模可以大大简化多模问题的求解。在求解具有功耗模式的优化问题时,因变量和自变量组成的选择对约束的建模、降阶梯度和主要计算表达式的形成以及优化搜索的整体速度都有根本性的影响
{"title":"Statistical Multimode Accounting in the Problem of Optimal Reactive Load Compensation when Constructing Smart Grids","authors":"A. Gerasimenko","doi":"10.17516/1999-494x-0359","DOIUrl":"https://doi.org/10.17516/1999-494x-0359","url":null,"abstract":"The article deals with the development prospects for smart grids. An approach to optimizing the modes of electric power systems in terms of reactive power is presented in detail. The solution of this problem considers the multimodality, determination of the integral characteristics of the modes, etc. Analytical modeling of load changes by means of the method of factor analysis allows to reduce the amount of information drastically without a significant loss of the accuracy of the obtained solutions. For this purpose, the actually correlated electrical loads of various nodes of electric power systems are represented in the form of a linear combination of independent random variables, namely, generalized load graphs. It is shown that the inclusion of multimode by orthogonal graphs results in a significant simplification of the solution of multimode problems. The choice of the dependent and independent variables composition when solving the optimization problem with the power consumption modes has a fundamental effect both on the modeling of constraints, the formation of the reduced gradient and the main calculation expressions, and on the speed of the optimization search as a whole","PeriodicalId":17206,"journal":{"name":"Journal of Siberian Federal University: Engineering & Technologies","volume":"2010 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89512397","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
Development of an Algorithm for Defining Thyristors Opening Angle Value at the New Configuration of Grid Commutation of Reversible Converter Arms of Electric Locomotive 电力机车可逆变换器臂栅换流新配置下晶闸管开闸角值的确定算法研究
Pub Date : 2021-12-01 DOI: 10.17516/1999-494x-0361
Oleg V. Chikirkin
The article presents a new approach in the application of a diode discharge arm which is aimed at increasing the energy indicators of traction mode of AC locomotives. The method implies the utilization of electromagnetic energy stored in the commutate current circuit for closing exhausted thyristor arms of traction converters through a buffer contour provided by the discharge arm. A mathematical simulation of electromagnetic processes of the standard and proposed converters has been performed. The analysis of the results allows to find the most optimal value of thyristor arms opening angle when the discharge arm closes fully the exhausted thyristor arms in compliance with the condition of increasing the power factor of the electric locomotive. The developed control method of the proposed converter is presented by a table of pulses fed to the thyristors electrodes, as well as by the algorithm of point-of-time calculation of the impulses generation
本文提出了一种应用二极管放电臂的新方法,旨在提高交流机车牵引方式的能量指标。该方法意味着利用存储在换向电流电路中的电磁能,通过由放电臂提供的缓冲轮廓闭合牵引变流器的耗尽晶闸管臂。对标准变换器和建议变换器的电磁过程进行了数学模拟。通过对结果的分析,找出在满足提高电力机车功率因数的条件下,放电臂完全闭合耗尽的晶闸管臂时晶闸管臂开口角的最优值。所提出的变换器的控制方法是通过输入到晶闸管电极的脉冲表以及脉冲产生的时间点计算算法来实现的
{"title":"Development of an Algorithm for Defining Thyristors Opening Angle Value at the New Configuration of Grid Commutation of Reversible Converter Arms of Electric Locomotive","authors":"Oleg V. Chikirkin","doi":"10.17516/1999-494x-0361","DOIUrl":"https://doi.org/10.17516/1999-494x-0361","url":null,"abstract":"The article presents a new approach in the application of a diode discharge arm which is aimed at increasing the energy indicators of traction mode of AC locomotives. The method implies the utilization of electromagnetic energy stored in the commutate current circuit for closing exhausted thyristor arms of traction converters through a buffer contour provided by the discharge arm. A mathematical simulation of electromagnetic processes of the standard and proposed converters has been performed. The analysis of the results allows to find the most optimal value of thyristor arms opening angle when the discharge arm closes fully the exhausted thyristor arms in compliance with the condition of increasing the power factor of the electric locomotive. The developed control method of the proposed converter is presented by a table of pulses fed to the thyristors electrodes, as well as by the algorithm of point-of-time calculation of the impulses generation","PeriodicalId":17206,"journal":{"name":"Journal of Siberian Federal University: Engineering & Technologies","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74770964","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
Model of the Method of Autonomous Navigation of Unmanned Aerial Vehicles Based on Infrared Images of the Terrain 基于地形红外图像的无人机自主导航方法模型
Pub Date : 2021-11-01 DOI: 10.17516/1999-494x-0346
I. Ischuk, M. Likhachev
The article presents a descriptive model of autonomous navigation of unmanned aerial vehicles based on infrared images. The method and algorithm for implementing the autonomous navigation model are considered. Numerical estimates of the efficiency of autonomous navigation based on multispectral multi-time photographic survey of the Earth's surface are obtained
提出了一种基于红外图像的无人机自主导航描述模型。研究了自主导航模型的实现方法和算法。给出了基于多光谱多时间地球表面摄影测量的自主导航效率的数值估计
{"title":"Model of the Method of Autonomous Navigation of Unmanned Aerial Vehicles Based on Infrared Images of the Terrain","authors":"I. Ischuk, M. Likhachev","doi":"10.17516/1999-494x-0346","DOIUrl":"https://doi.org/10.17516/1999-494x-0346","url":null,"abstract":"The article presents a descriptive model of autonomous navigation of unmanned aerial vehicles based on infrared images. The method and algorithm for implementing the autonomous navigation model are considered. Numerical estimates of the efficiency of autonomous navigation based on multispectral multi-time photographic survey of the Earth's surface are obtained","PeriodicalId":17206,"journal":{"name":"Journal of Siberian Federal University: Engineering & Technologies","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79166408","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
Ways to Improve the Effectiveness of Defeating Group Air Targets in Anti-Aircraft Combat 提高防空作战中打击空中团体目标效能的途径
Pub Date : 2021-11-01 DOI: 10.17516/1999-494x-0355
Alexander A. Antsiferov
This article discusses ways to improve the efficiency of anti-aircraft guided missiles to intercept group air targets. An effective way to defeat the elements of group air targets using anti-aircraft guided missiles is the joint guidance of several missiles at several air targets from the group. The basic technical requirements for anti-aircraft guided missiles for the implementation of this principle are defined
本文讨论了提高防空导弹拦截群空中目标效率的途径。利用防空导弹打击群空中目标的有效方法是多枚导弹对群内多个空中目标进行联合制导。明确了实现这一原理对防空导弹的基本技术要求
{"title":"Ways to Improve the Effectiveness of Defeating Group Air Targets in Anti-Aircraft Combat","authors":"Alexander A. Antsiferov","doi":"10.17516/1999-494x-0355","DOIUrl":"https://doi.org/10.17516/1999-494x-0355","url":null,"abstract":"This article discusses ways to improve the efficiency of anti-aircraft guided missiles to intercept group air targets. An effective way to defeat the elements of group air targets using anti-aircraft guided missiles is the joint guidance of several missiles at several air targets from the group. The basic technical requirements for anti-aircraft guided missiles for the implementation of this principle are defined","PeriodicalId":17206,"journal":{"name":"Journal of Siberian Federal University: Engineering & Technologies","volume":"78 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91479114","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
期刊
Journal of Siberian Federal University: Engineering & Technologies
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1