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Decoding algorithms for Goppa codes with errors and erasures 带有错误和擦除的Goppa码的解码算法
IF 0.2
Izvestiya of Saratov University Mathematics Mechanics Informatics Pub Date : 2022-03-22 DOI: 10.18500/1816-9791-2022-22-1-28-47
S. M. Ratseev, O. Cherevatenko
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引用次数: 0
Uniqueness theorems for recovering the inverse image under degenerate transformations 退化变换下恢复逆象的唯一性定理
IF 0.2
Izvestiya of Saratov University Mathematics Mechanics Informatics Pub Date : 2022-03-22 DOI: 10.18500/1816-9791-2022-22-1-15-27
A. Klyachin, V. Klyachin
{"title":"Uniqueness theorems for recovering the inverse image under degenerate transformations","authors":"A. Klyachin, V. Klyachin","doi":"10.18500/1816-9791-2022-22-1-15-27","DOIUrl":"https://doi.org/10.18500/1816-9791-2022-22-1-15-27","url":null,"abstract":"","PeriodicalId":42789,"journal":{"name":"Izvestiya of Saratov University Mathematics Mechanics Informatics","volume":"62 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2022-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88239775","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 information packet interaction in a multilevel system of digital twins 多级数字孪生系统中信息包交互的概念
IF 0.2
Izvestiya of Saratov University Mathematics Mechanics Informatics Pub Date : 2021-11-22 DOI: 10.18500/1816-9791-2021-21-4-532-543
A. Vorobev
{"title":"The concept of information packet interaction in a multilevel system of digital twins","authors":"A. Vorobev","doi":"10.18500/1816-9791-2021-21-4-532-543","DOIUrl":"https://doi.org/10.18500/1816-9791-2021-21-4-532-543","url":null,"abstract":"","PeriodicalId":42789,"journal":{"name":"Izvestiya of Saratov University Mathematics Mechanics Informatics","volume":"54 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2021-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79024712","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
Wavelet p-analogs of the discrete Haar transform 离散哈尔变换的小波p类比
IF 0.2
Izvestiya of Saratov University Mathematics Mechanics Informatics Pub Date : 2021-11-22 DOI: 10.18500/1816-9791-2021-21-4-520-531
M. Bespalov
{"title":"Wavelet p-analogs of the discrete Haar transform","authors":"M. Bespalov","doi":"10.18500/1816-9791-2021-21-4-520-531","DOIUrl":"https://doi.org/10.18500/1816-9791-2021-21-4-520-531","url":null,"abstract":"","PeriodicalId":42789,"journal":{"name":"Izvestiya of Saratov University Mathematics Mechanics Informatics","volume":"11 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2021-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78762076","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
On differential approximations of difference schemes 差分格式的微分近似
IF 0.2
Izvestiya of Saratov University Mathematics Mechanics Informatics Pub Date : 2021-11-22 DOI: 10.18500/1816-9791-2021-21-4-472-488
Y. A. Blinkov, M. Malykh, L. Sevastianov
{"title":"On differential approximations of difference schemes","authors":"Y. A. Blinkov, M. Malykh, L. Sevastianov","doi":"10.18500/1816-9791-2021-21-4-472-488","DOIUrl":"https://doi.org/10.18500/1816-9791-2021-21-4-472-488","url":null,"abstract":"","PeriodicalId":42789,"journal":{"name":"Izvestiya of Saratov University Mathematics Mechanics Informatics","volume":"488 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2021-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78125689","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
Binary basic splines in MRA MRA中的二元基本样条
IF 0.2
Izvestiya of Saratov University Mathematics Mechanics Informatics Pub Date : 2021-11-22 DOI: 10.18500/1816-9791-2021-21-4-458-471
S. Chumachenko
{"title":"Binary basic splines in MRA","authors":"S. Chumachenko","doi":"10.18500/1816-9791-2021-21-4-458-471","DOIUrl":"https://doi.org/10.18500/1816-9791-2021-21-4-458-471","url":null,"abstract":"","PeriodicalId":42789,"journal":{"name":"Izvestiya of Saratov University Mathematics Mechanics Informatics","volume":"12 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2021-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76671247","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 structure of groups with cyclic commutator subgroups indecomposable to a subdirect product of groups 循环换向子群不能分解为群的子直积的群的结构
IF 0.2
Izvestiya of Saratov University Mathematics Mechanics Informatics Pub Date : 2021-11-22 DOI: 10.18500/1816-9791-2021-21-4-442-447
V. Kozlov, G. N. Titov
{"title":"The structure of groups with cyclic commutator subgroups indecomposable to a subdirect product of groups","authors":"V. Kozlov, G. N. Titov","doi":"10.18500/1816-9791-2021-21-4-442-447","DOIUrl":"https://doi.org/10.18500/1816-9791-2021-21-4-442-447","url":null,"abstract":"","PeriodicalId":42789,"journal":{"name":"Izvestiya of Saratov University Mathematics Mechanics Informatics","volume":"11 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2021-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89259527","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
Numerical method for calculating the stress-strain state in a prismatic surface-hardened spacemen with a notch in elastic and elastoplastic formulations 带缺口的棱柱形表面硬化空间体应力-应变状态的弹性和弹塑性计算方法
IF 0.2
Izvestiya of Saratov University Mathematics Mechanics Informatics Pub Date : 2021-11-22 DOI: 10.18500/1816-9791-2021-21-4-503-519
V. P. Radchenko, D. Shishkin
{"title":"Numerical method for calculating the stress-strain state in a prismatic surface-hardened spacemen with a notch in elastic and elastoplastic formulations","authors":"V. P. Radchenko, D. Shishkin","doi":"10.18500/1816-9791-2021-21-4-503-519","DOIUrl":"https://doi.org/10.18500/1816-9791-2021-21-4-503-519","url":null,"abstract":". The problem of calculating the stress-strain state in the region of through stress concentrators in the form of a transverse notch of semicircular, through and V-shaped shape in a prismatic sample after advanced surface plastic deformation in elastic and elastoplastic formulations based on the finite element method is solved. The initial formulations are reduced to fictitious problems of thermoelasticity and thermoelastoplasticity using the method of initial deformations. At the first stage, the field of residual stresses and plastic deformations in a smooth sample after hardening is determined. At the second stage, residual plastic deformations are modeled by temperature deformations in an inhomogeneous temperature field along the depth of the hardened layer. At the third stage, a through notch of a given geometric shape is applied, and the problem of fictitious thermoelasticity or thermoelastoplasticity on the redistribution of stresses in the concentrator area is solved. Model calculations were performed on the basis of experimental data for a smooth sample made of EP742 alloy after vibro-shock ultrasonic hardening of one of its faces. There is a significant discrepancy between the solutions for the elastic and elastoplastic formulations in the notches, the depth of which does not exceed the thickness of the hardened layer. The results obtained for problems with notches in linear elastic and elastoplastic formulations, along with the results for a smooth sample, were subjected to a comparative analysis of the distribution of residual stresses to establish the influence area of the stress concentrator. It was found that, regardless of the shape of the notch, the values of residual stresses outside the stress concentrator zone when solving elastic or elastoplastic problems practically coincide with the corresponding values for a smooth sample.","PeriodicalId":42789,"journal":{"name":"Izvestiya of Saratov University Mathematics Mechanics Informatics","volume":"40 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2021-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78894884","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
Two-dimensional limit series in ultraspherical Jacobi polynomials and their approximative properties 超球面雅可比多项式的二维极限级数及其近似性质
IF 0.2
Izvestiya of Saratov University Mathematics Mechanics Informatics Pub Date : 2021-11-22 DOI: 10.18500/1816-9791-2021-21-4-422-433
I. G. Guseinov, R. Gadzhimirzaev
{"title":"Two-dimensional limit series in ultraspherical Jacobi polynomials and their approximative properties","authors":"I. G. Guseinov, R. Gadzhimirzaev","doi":"10.18500/1816-9791-2021-21-4-422-433","DOIUrl":"https://doi.org/10.18500/1816-9791-2021-21-4-422-433","url":null,"abstract":"","PeriodicalId":42789,"journal":{"name":"Izvestiya of Saratov University Mathematics Mechanics Informatics","volume":"81 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2021-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79995199","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
Numerical simulation of oil production using surfactant-polymer flooding 表面活性剂-聚合物驱采油数值模拟
IF 0.2
Izvestiya of Saratov University Mathematics Mechanics Informatics Pub Date : 2021-11-22 DOI: 10.18500/1816-9791-2021-21-4-544-558
M. Persova, Y. Soloveichik, I. I. Patrushev, A. Ovchinnikova
{"title":"Numerical simulation of oil production using surfactant-polymer flooding","authors":"M. Persova, Y. Soloveichik, I. I. Patrushev, A. Ovchinnikova","doi":"10.18500/1816-9791-2021-21-4-544-558","DOIUrl":"https://doi.org/10.18500/1816-9791-2021-21-4-544-558","url":null,"abstract":"","PeriodicalId":42789,"journal":{"name":"Izvestiya of Saratov University Mathematics Mechanics Informatics","volume":"61 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2021-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83511394","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
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