Uchenye Zapiski Kazanskogo Universiteta-Seriya Fiziko-Matematicheskie Nauki最新文献_第6页

Long-Period Nutational-Precessional Motions of the Instantaneous Earth Rotation Pole 瞬时地球自转极的长周期国家岁差运动

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Uchenye Zapiski Kazanskogo Universiteta-Seriya Fiziko-Matematicheskie Nauki Pub Date : 2020-01-01 DOI: 10.26907/2541-7746.2020.4.467-480

V. Belashov, E. Belashova, O. Kharshiladze

引用次数: 0

Selenophysics and Models of the Lunar Three-Layered Mantle 月球三层地幔的月面物理和模型

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Uchenye Zapiski Kazanskogo Universiteta-Seriya Fiziko-Matematicheskie Nauki Pub Date : 2020-01-01 DOI: 10.26907/2541-7746.2020.1.27-37

A. Aganin, M. A. Il’gamov, I. Mustafin

引用次数: 0

On the Structure, Complexity, and Depth of the Circuits over the Basis {&, ∨} Realizing Step Boolean Functions 基于{&，∨实现阶跃布尔函数的电路的结构、复杂度和深度

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Uchenye Zapiski Kazanskogo Universiteta-Seriya Fiziko-Matematicheskie Nauki Pub Date : 2020-01-01 DOI: 10.26907/2541-7746.2020.3.335-349

S. A. Lozhkin, D.S. Kinzhikeyeva

引用次数: 0

On the Properties of the Projective Lie Algebras of Rigid h-Spaces H32 of the Type {32} {32}型刚性h-空间H32的射影李代数的性质

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Uchenye Zapiski Kazanskogo Universiteta-Seriya Fiziko-Matematicheskie Nauki Pub Date : 2020-01-01 DOI: 10.26907/2541-7746.2020.2.111-119

A. V. Aminova, D. R. Khakimov

引用次数: 0

Refined Analytical Solutions of the Coupled Problems on Free and Forced Vibrations of a Rectangular Composite Plate Surrounded by Acoustic Media 声介质包围矩形复合材料板自由振动与强迫振动耦合问题的精细解析解

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Uchenye Zapiski Kazanskogo Universiteta-Seriya Fiziko-Matematicheskie Nauki Pub Date : 2020-01-01 DOI: 10.26907/2541-7746.2020.2.160-179

V. Paimushin, R. Gazizullin

{"title":"Refined Analytical Solutions of the Coupled Problems on Free and Forced Vibrations of a Rectangular Composite Plate Surrounded by Acoustic Media","authors":"V. Paimushin, R. Gazizullin","doi":"10.26907/2541-7746.2020.2.160-179","DOIUrl":"https://doi.org/10.26907/2541-7746.2020.2.160-179","url":null,"abstract":"Two problems of the monoharmonic sound wave transmission through a thin rectangular composite plate hinged in the opening of an absolutely stiff dividing wall were considered using the discrete layered damping model of a multilayer plate at small displacements and deformations, with account of the internal damping of layers according to the Kelvin–Voight model. In setting the first problem, it was assumed that the plate located between two semiinfinite spaces and a plane sound wave with a given amplitude value of the pressure is incident on it. In setting the second problem, it was considered that the plate is situated between two absolutely stiff barriers; one of them, owing to the harmonic vibration with a given displacement amplitude of the plate, forms an incident sound wave, while the other is stationary and coated by an energy-absorbing material with high damping properties. Behavior of the acoustic media was described by the classical wave equations based on the model of an ideal compressible fluid. Exact analytical solutions of the formulated problems were constructed. With their help, the sound insulation parameter of composite plate reinforced with carbon fiber textile was studied and the characteristics of its stress-strain state were investigated depending on the frequency of the incident sound wave. It was shown that the mechanics of the deformation of structural elements made of fiber-reinforced composites under high-frequency acoustic impact must be described by refined equations of motion, which have a high degree of accuracy and pithiness, because the stress-strain state formed in them are almost three-dimensional.","PeriodicalId":41863,"journal":{"name":"Uchenye Zapiski Kazanskogo Universiteta-Seriya Fiziko-Matematicheskie Nauki","volume":"206 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73968359","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

Asymptotics of Slow Motions of a Rectangular Cylinder in a Liquid after a Separation Impact 分离冲击后矩形圆柱在液体中缓慢运动的渐近性

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Uchenye Zapiski Kazanskogo Universiteta-Seriya Fiziko-Matematicheskie Nauki Pub Date : 2020-01-01 DOI: 10.26907/2541-7746.2020.4.426-440

M. Norkin

{"title":"Asymptotics of Slow Motions of a Rectangular Cylinder in a Liquid after a Separation Impact","authors":"M. Norkin","doi":"10.26907/2541-7746.2020.4.426-440","DOIUrl":"https://doi.org/10.26907/2541-7746.2020.4.426-440","url":null,"abstract":"The process of collapse of a cavern, which is formed following the separation impact pro-duced by a rectangular cylinder in an ideal, incompressible, and heavy liquid, was studied. Assuming that the speed of the cylinder is low, asymptotics of the main characteristics of the impact were constructed. The diﬃculties arising in this case are mainly related to the fact that the dynamics of the separation points is not known in advance and depends on a small parameter, i.e., on the dimensionless velocity of the cylinder. With the help of a special change of variables, the matter was reduced to the study of a problem with the dynamics of separation points corresponding to the leading approximation independent of the indicated parameter. This enabled us to determine the second term of the asymptotics with account for the nonlinear terms in the model. In the leading approximation, a problem with a free boundary, which is similar to the classical model of an impact with separation at each ﬁxed moment of time, was formulated. On the basis of the ﬁrst two terms of the asymptotics, the process of collapse of the cavern was described with allowance for the rise of the inner free boundary of the liquid. Comparison with the previously obtained results was carried out.","PeriodicalId":41863,"journal":{"name":"Uchenye Zapiski Kazanskogo Universiteta-Seriya Fiziko-Matematicheskie Nauki","volume":"12 21","pages":""},"PeriodicalIF":0.3,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72388095","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

Universal Hash Functions from Quantum Procedures 量子过程中的通用哈希函数

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Uchenye Zapiski Kazanskogo Universiteta-Seriya Fiziko-Matematicheskie Nauki Pub Date : 2020-01-01 DOI: 10.26907/2541-7746.2020.3.259-268

F. Ablayev

{"title":"Universal Hash Functions from Quantum Procedures","authors":"F. Ablayev","doi":"10.26907/2541-7746.2020.3.259-268","DOIUrl":"https://doi.org/10.26907/2541-7746.2020.3.259-268","url":null,"abstract":"Modern quantum technologies are NISQ (Noisy Intermediate-Scale Quantum) devices, which are used to create insuﬃciently accurate quantum computers with low computing power. However, quantum technologies have advanced considerably during the past years. Thus, the issue of demonstrating “quantum supremacy” in the era of NISQ technologies is on the agenda. This study demonstrates that “quantum supremacy” is forthcoming. We propose procedures for constructing a universal family of hash functions based on a quantum hashing process that maps the original sequence w to a quantum hash state and then by random trans-formation to the state | ψ (cid:105) and generating the sequence u , which is an approximate description of the state | ψ (cid:105) . We proved that the proposed procedure generates a family of nondeterministic hash functions F , which allow us to reliably distinguish between diﬀerent arguments. The F family can be considered an (cid:178) -universal family of nondeterministic hash functions. We assume that the development of this research area will cast light on the eﬀect of “quantum supremacy” and will also have a certain impact on the advance of post-quantum cryptography.","PeriodicalId":41863,"journal":{"name":"Uchenye Zapiski Kazanskogo Universiteta-Seriya Fiziko-Matematicheskie Nauki","volume":"68 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80267213","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

A Semiclassical Approach Reproducing Asymptotically the Heitler Formula for Atomic Photoionization 原子光离的渐近再现Heitler公式的半经典方法

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Uchenye Zapiski Kazanskogo Universiteta-Seriya Fiziko-Matematicheskie Nauki Pub Date : 2020-01-01 DOI: 10.26907/2541-7746.2020.2.211-222

A. M. Shaimardanov, V. Kaurov, E. A. Petrova

引用次数: 1

On Single Detection Test Sets under Replacements of Gates with Inverters 逆变器换门情况下的单检测测试集

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Uchenye Zapiski Kazanskogo Universiteta-Seriya Fiziko-Matematicheskie Nauki Pub Date : 2020-01-01 DOI: 10.26907/2541-7746.2020.3.359-366

G. Temerbekova, D. S. Romanov

引用次数: 2

The Influence of Strongly Turbulized Liquid Flow Parameters on the Near-Wall Transitional Flows in the Boundary Layer 强湍流液体流动参数对边界层近壁过渡流动的影响

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Uchenye Zapiski Kazanskogo Universiteta-Seriya Fiziko-Matematicheskie Nauki Pub Date : 2020-01-01 DOI: 10.26907/2541-7746.2020.1.38-51

V. M. Zubarev

{"title":"The Influence of Strongly Turbulized Liquid Flow Parameters on the Near-Wall Transitional Flows in the Boundary Layer","authors":"V. M. Zubarev","doi":"10.26907/2541-7746.2020.1.38-51","DOIUrl":"https://doi.org/10.26907/2541-7746.2020.1.38-51","url":null,"abstract":"The effect of the scale and the high intensity of incident-flow turbulence in a boundary layer on a smooth plane plate with rounded edge (experiment T3H) under a zero pressure gradient was analyzed. Using the well-known experimental and calculated data, the modeling problem of the initially laminar boundary layer transfer to the turbulent one was investigated by the numerical methods on the basis of the near-wall modified turbulence model with two additional transfer equations for the turbulent kinetic energy and the turbulence dissipation rate. Turbulent flows modeling near the flat surface with the high level of incident-flow turbulence is complicated by two general problems: the definition and description of the laminar-to-turbulent transfer along the surface and the viscous sublayer precise resolution under the developed turbulent mode. For the inviscid liquid flowing along the flat plate with the high turbulence degree of more than 1%, the turbulence scale and the incident-flow turbulence intensity joint influence on the flow dynamic and integral characteristics in the boundary layer and turbulence parameters was studied in detail.","PeriodicalId":41863,"journal":{"name":"Uchenye Zapiski Kazanskogo Universiteta-Seriya Fiziko-Matematicheskie Nauki","volume":"74 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83760224","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