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USSR Computational Mathematics and Mathematical Physics最新文献

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The use of local coordinates in optimization problems 局部坐标在优化问题中的应用
USSR Computational Mathematics and Mathematical Physics Pub Date : 1990-01-01 DOI: 10.1016/0041-5553(90)90013-I
D.V. Denisov
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引用次数: 0
The properties of effective modulus of composition plates 复合材料板有效模量的性质
USSR Computational Mathematics and Mathematical Physics Pub Date : 1990-01-01 DOI: 10.1016/0041-5553(90)90113-7
M.V. Reztsov
{"title":"The properties of effective modulus of composition plates","authors":"M.V. Reztsov","doi":"10.1016/0041-5553(90)90113-7","DOIUrl":"10.1016/0041-5553(90)90113-7","url":null,"abstract":"<div><p>Some data are obtained which enable the results of previous papers on the averaging of composite plates to be generalized to the case of a composition layer whose structure is restricted by requirement of physical symmetry with respect to the middle plane.</p></div>","PeriodicalId":101271,"journal":{"name":"USSR Computational Mathematics and Mathematical Physics","volume":"30 6","pages":"Pages 103-105"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0041-5553(90)90113-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75646626","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
A numerical method of control optimization in delay systems for immune response modelling 时滞系统免疫反应建模控制优化的数值方法
USSR Computational Mathematics and Mathematical Physics Pub Date : 1990-01-01 DOI: 10.1016/0041-5553(90)90157-N
A.S. Buldayev
{"title":"A numerical method of control optimization in delay systems for immune response modelling","authors":"A.S. Buldayev","doi":"10.1016/0041-5553(90)90157-N","DOIUrl":"10.1016/0041-5553(90)90157-N","url":null,"abstract":"","PeriodicalId":101271,"journal":{"name":"USSR Computational Mathematics and Mathematical Physics","volume":"30 5","pages":"Pages 18-28"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0041-5553(90)90157-N","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75452411","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: 4
A method for the numerical solution of integral equations in boundary value problems with finite-order Abelian symmetry groups 有限阶阿贝尔对称群边值问题积分方程数值解的一种方法
USSR Computational Mathematics and Mathematical Physics Pub Date : 1990-01-01 DOI: 10.1016/0041-5553(90)90107-4
E.V. Zakharov, S.I. Safronov, R.P. Tarasov
{"title":"A method for the numerical solution of integral equations in boundary value problems with finite-order Abelian symmetry groups","authors":"E.V. Zakharov,&nbsp;S.I. Safronov,&nbsp;R.P. Tarasov","doi":"10.1016/0041-5553(90)90107-4","DOIUrl":"10.1016/0041-5553(90)90107-4","url":null,"abstract":"<div><p>It is shown that for boundary value problems with commutative finite-order symmetry groups it is possible to use the concepts of convolution and the Fourier transform for finite groups to reduce considerably the order of the matrix equations used to approximate the original integral equations, and thus to extend the range of problems amenable to numerical analysis. An implementation of this method is considered for boundary value problems with Abelian symmetry group of eighth order, describing a quadrupole-type system. Results of a numerical experiment are presented for this case, enabling the efficiency of the method to be estimated.</p></div>","PeriodicalId":101271,"journal":{"name":"USSR Computational Mathematics and Mathematical Physics","volume":"30 6","pages":"Pages 44-53"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0041-5553(90)90107-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74209948","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
Determination of the absorption coefficient in the spherically symmetric case 球对称情况下吸收系数的测定
USSR Computational Mathematics and Mathematical Physics Pub Date : 1990-01-01 DOI: 10.1016/0041-5553(90)90160-T
V.I. Gryn
{"title":"Determination of the absorption coefficient in the spherically symmetric case","authors":"V.I. Gryn","doi":"10.1016/0041-5553(90)90160-T","DOIUrl":"10.1016/0041-5553(90)90160-T","url":null,"abstract":"","PeriodicalId":101271,"journal":{"name":"USSR Computational Mathematics and Mathematical Physics","volume":"30 5","pages":"Pages 42-54"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0041-5553(90)90160-T","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81635692","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
Stability bounds for solutions of some conditionally well-posed problems on a set containing discontinuous functions 含不连续函数集上若干条件良定问题解的稳定性界
USSR Computational Mathematics and Mathematical Physics Pub Date : 1990-01-01 DOI: 10.1016/0041-5553(90)90102-X
S.L. Logunov
{"title":"Stability bounds for solutions of some conditionally well-posed problems on a set containing discontinuous functions","authors":"S.L. Logunov","doi":"10.1016/0041-5553(90)90102-X","DOIUrl":"10.1016/0041-5553(90)90102-X","url":null,"abstract":"<div><p>Stability bounds for the solutions of conditionally well-posed problems for the case when the variation and the maximum absolute value of the solutions are bounded by known constants are derived. Differentiation problems, Volterra and Abel integral equations, and convolution equations are considered.</p></div>","PeriodicalId":101271,"journal":{"name":"USSR Computational Mathematics and Mathematical Physics","volume":"30 6","pages":"Pages 1-9"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0041-5553(90)90102-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84260114","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 best single-layer brightening coating for a frequency band 最好的单层增亮涂层的频带
USSR Computational Mathematics and Mathematical Physics Pub Date : 1990-01-01 DOI: 10.1016/0041-5553(90)90036-R
Yu.I. Khudak
{"title":"The best single-layer brightening coating for a frequency band","authors":"Yu.I. Khudak","doi":"10.1016/0041-5553(90)90036-R","DOIUrl":"10.1016/0041-5553(90)90036-R","url":null,"abstract":"<div><p>The existence of a unique global minimum for the maximum of the power reflection coefficient of a single-layer coating in a specified frequency band is proved.</p></div>","PeriodicalId":101271,"journal":{"name":"USSR Computational Mathematics and Mathematical Physics","volume":"30 1","pages":"Pages 238-240"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0041-5553(90)90036-R","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85834495","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: 2
Quasioptimal control search algorithms using state-space partitioning 基于状态空间划分的准最优控制搜索算法
USSR Computational Mathematics and Mathematical Physics Pub Date : 1990-01-01 DOI: 10.1016/0041-5553(90)90155-L
E.N. Orel
{"title":"Quasioptimal control search algorithms using state-space partitioning","authors":"E.N. Orel","doi":"10.1016/0041-5553(90)90155-L","DOIUrl":"10.1016/0041-5553(90)90155-L","url":null,"abstract":"","PeriodicalId":101271,"journal":{"name":"USSR Computational Mathematics and Mathematical Physics","volume":"30 5","pages":"Pages 1-8"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0041-5553(90)90155-L","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84097107","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 projection method for singularly perturbed boundary-value problems 奇异摄动边值问题的投影方法
USSR Computational Mathematics and Mathematical Physics Pub Date : 1990-01-01 DOI: 10.1016/0041-5553(90)90043-R
I.A. Blatov
{"title":"The projection method for singularly perturbed boundary-value problems","authors":"I.A. Blatov","doi":"10.1016/0041-5553(90)90043-R","DOIUrl":"10.1016/0041-5553(90)90043-R","url":null,"abstract":"<div><p>A finite element method for linear and non-linear singularly perturbed boundary-value problems is considered. It is proved that the approximate solutions converge to the exact solution in the norm of the space of continuous functions, uniformly in the small parameter. The proposed scheme is suitable for solving a wider class of problems than can be handled by the popular “hinged element method”, and also produces a higher order of approximation.</p></div>","PeriodicalId":101271,"journal":{"name":"USSR Computational Mathematics and Mathematical Physics","volume":"30 4","pages":"Pages 47-56"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0041-5553(90)90043-R","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80360164","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: 8
The use of duality to determine the branching order of variables and to estimate the bounds in the solution of the knapsack problem 在背包问题的解中，利用对偶性来确定变量的分支阶和估计界
USSR Computational Mathematics and Mathematical Physics Pub Date : 1990-01-01 DOI: 10.1016/0041-5553(90)90100-7
A.O. Alekseyev, O.G. Alekseyev, V.D. Kiselev
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引用次数: 0
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