卷 9, 编号 4-4 (2015)
- 年: 2015
- 文章: 19
- URL: https://journals.rcsi.science/2074-0530/issue/view/3721
Articles
Application of information technologies for calibration of measuring instruments
摘要
This paper proposes improvement for calibration of caliper “ШЦ-1” in order to increase its au- tomation and simplicity, as well as to reduce labor input. The result is achieved by using of a spe-cially created software.
Izvestiya MGTU MAMI. 2015;9(4-4):5-8
5-8
Contact problem for ring elastic coating of a cylindrical cavity in a solid body
摘要
This article proposed analytical method of solving of the contact problem for an elastic coating of a cylindrical hole in a solid body when it interacts with a solid cylinder. The law of contact pres- sure changing is presented in the form of an infinite series with an infinite number of unknown con- stants. As a result, the authors found the relationship between the resultant load acting on the solid cylinder, and the contact area and contact pressure distribution law.
Izvestiya MGTU MAMI. 2015;9(4-4):9-13
9-13
Endochronic theory of inelastisity modeling microfracture and hardening of material
摘要
This article offers a tensor-parametric variants of endochronic elasticity theory, considering mi- crotension, microfracture and hardening of material. There are given the solutions for defining rela- tions under uniaxial loading. The relationship is set between some variants of the theory. The au- thors analyzed the influence of the Endochronic parameter and the parameter of hardening material in the form of uniaxial curves of “strain~strain”. The article contains results of some numerical ex-periments, including a scheme with strain of a softening material.
Izvestiya MGTU MAMI. 2015;9(4-4):14-19
14-19
Mathematical modeling of near pointing of the spacecraft
摘要
In this paper a study of mathematical models of motion of coupled space objects. The authors developed a method of determining of basic characteristics of the couple and the parameters of itsmotion when pointing the spacecraft of space cable systems for meeting with other spacecraft.
Izvestiya MGTU MAMI. 2015;9(4-4):20-28
20-28
Relative motion of coupled spacecrafts in polar coordinates
摘要
This work is devoted to development of mathematical models of motion of coupled space ob- jects. The authors conducted a study of the relative motion trajectories of coupled spacecraft in po-lar coordinates.
Izvestiya MGTU MAMI. 2015;9(4-4):29-34
29-34
Methods of linear multiple regression in a matrix form
摘要
The article contains a summary of three basic and two weighted linear multiple regression tech- niques in matrix form, together with the method of least squares of Gauss constitute a new tool re- gression analysis. The article contains a matrix formula that can be used to obtain equations of line- ar multiple regression and the basic weighted least-squares method to obtain regression equations without constant term and the method of obtaining the regression equations of general form. The article provides an example of use of matrix methods to obtain the coefficients of regression equa- tion of the general form, ie equation of equal performance.
Izvestiya MGTU MAMI. 2015;9(4-4):35-41
35-41
The methods of regression and the resulting invariants based on them
摘要
The article contains a summary of the invariants derived from three basic and three weighted lin- ear multiple regression methods: the method of least squares method of obtaining the regression equations without constant term and the method of obtaining the regression equations of general form. This article contains formulas that are used to calculate these invariants. The article gives an example of calculating of values of the invariants by provided sample data.
Izvestiya MGTU MAMI. 2015;9(4-4):42-45
42-45
Obtaining of non-linear regression equations with parabolic optimization
摘要
The paper proposed a new approximate method of obtaining of non-linear regression equation - parabolic optimization. There is an example of its application to obtain a nonlinear equation that can not be obtained by known methods. As a statistical criterion for evaluation of the quality of the re- sulting equation standard deviation is used.
Izvestiya MGTU MAMI. 2015;9(4-4):46-52
46-52
Formulas for calculation of geometric characteristics of plane figures, restricted by cubic spline curves
摘要
The article describes calculation of geometric characteristics of plane figures, which outlines are described by cubic spline curves. The authors obtained the exact formula to calculate area and static moments. The formulas allow to define the position of the center of gravity of figures and volumesof bodies formed by rotation of shapes around the axis.
Izvestiya MGTU MAMI. 2015;9(4-4):53-58
53-58
A mathematical model of treelike actuator of a walking robot considering imposed links
摘要
Block-matrix model of treelike actuator of walking robot is developed by considering external links imposed. This paper proposes an algorithm of formation of the mathematical model based on the use of matrices (4x4) and graph theory. The authors showed efficiency of its use for walking robots (by example of a bipedal walking robot).
Izvestiya MGTU MAMI. 2015;9(4-4):59-63
59-63
Comparative analysis of strength processing methodologies in rocket-space and nuclear industries
摘要
In order to systematize the approaches to the settlement and experimental confirmation of strength of newly created rocket and space products using nuclear power sources, the article analyz-es the methodologies for ground processing of strength, used in aerospace and nuclear engineering.
Izvestiya MGTU MAMI. 2015;9(4-4):64-74
64-74
Calculation of the rate of constrained precipitation of monodisperse solid particles
摘要
In this paper, the authors derived generalized formula for calculating of the ratio of the rate of constrained precipitation to the rate of free precipitation for monodisperse particles of arbitrary shape based on analysis of known empirical relationships and semi-empirical method of calculation.
Izvestiya MGTU MAMI. 2015;9(4-4):75-81
75-81
Modeling of the flutter of a plate, which is a part of wedge surface
摘要
There is studied parameters correlation for full-scale and simulative processes of oscillations of the plate, which is a part of wedge surface, in gas flow. Similarity relations were obtained. Somepossible modeling parameters were proposed.
Izvestiya MGTU MAMI. 2015;9(4-4):82-85
82-85
Construction of multi-parameter Lyapunov function for a nonlinear system
摘要
In this paper, the system with two non-linearities, one of which is the multiplicative, constructed Lyapunov function containing 5 variable parameters. There is indicated possible application of this function to locate the region of asymptotic stability of the zero solution and optimization of thetransition process.
Izvestiya MGTU MAMI. 2015;9(4-4):86-95
86-95
Bifurcation of a cylindrical shell on two-tier process of deformation
摘要
In this paper we consider the bifurcation of thin circular cylindrical shell in implementation of complex processes of subcritical deformation of a two-tier broken trajectories in the deviatoric plane E1-E3 of A.A. Ilyushin. The shell is considered to be a long, hingedly supported. The prob- lem is solved in geometrically linear statement. The solution is built on the basis of the theory ofstability of elastic-plastic systems of V.G. Zubchaninov.
Izvestiya MGTU MAMI. 2015;9(4-4):96-99
96-99
Numerical methods in the study of seismic dynamics of complex systems of underground pipelines
摘要
In this article are considered some problems of oscillations of complex systems of underground pipelines under seismic loading. The resulting system of equations is solved by the finite difference of the second order of accuracy. The program is based on a computer algorithm implementation on oriented language Borland Delphi 7. Results of the solution are given in the form of graphs.
Izvestiya MGTU MAMI. 2015;9(4-4):100-105
100-105
Transverse compression of a two-layered elastic plane with a circular hole on the border between layers
摘要
The results are presented on the stress distribution in a transversally compressed two-layered elastic plane with a circular hole on the border between layers, received by using a variational fi- nite-difference procedure for solving plane elastic problems for the holed rectangular domains. The effects of the layers' elastic constants on the level of stresses around the hole are examined.
Izvestiya MGTU MAMI. 2015;9(4-4):106-110
106-110
Sorption wastewater treatment from heavy metal ions using waste of aluminum production
摘要
In this study, the authors investigated the possibility of using of red bauxite slurry (waste of alu- minum production) as adsorbent of ions of heavy metals from aqueous solutions. It was studied the dependence of adsorption of zinc cations and the pH of the nickel and the initial concentration ofaqueous solutions.
Izvestiya MGTU MAMI. 2015;9(4-4):111-114
111-114
The approach to modeling the process of information exchange on the TCP, based on the theory of finite Markov chains
摘要
The paper presents an approach to modeling the process of information exchange over TCP pro- tocol.
Izvestiya MGTU MAMI. 2015;9(4-4):115-119
115-119