Vol 10, No 1 (2010)
PHYSICAL AND MATHEMATICAL SCIENCES
5-15 286
Abstract
Mathematical aspects of the solution of spatial contact dynamic problem of contacting the cylindrical details of cars are considered. Updating of the method of the superposition is presented, that allows to conduct analytical research of the intense-deformed condition and to make practical recommendations according to intensity of local concentration of pressure in irregular zones of contact that practically predetermines strength parameters of the contact pair. The mechanical characteristics of interaction of piston fingers of internal combustion engines with the head of the rod and piston lugs are considered as a numerical experiment.
16-21 424
Abstract
The approach to modeling and numerical solution of the problem on distribution of the phase transfor-mation front in the frozen breeds which is quite actual for drilling and operation of chinks under the permafrost conditions is considered. The exact solution of the problem in case of semi-infinite physical space is presented. The area of its applicability is defined by means of a computing experiment.
22-27 317
Abstract
The work continues to research the insufficiently explored problem of bisingular operators with shift index. It considers new cases of index computation of the bisingular operators with indisintegrative involutive shift by the homotopy method.
28-35 279
Abstract
Grid development has approached the phase of realization of projects aimed at deployment of the large-scale operating infrastructures. Reality of practical implementation has not only brought in a whole new set of tasks, but also demands reevaluation of the methods that were previously developed and successfully tested in pilot experiments. One of the main component of such infrastructure is the software discussed in this article.
36-41 298
Abstract
The discrete model of the temperature levels of circular rotor stove is described. The computer program for calculation of thermal processes is made on the basis of the model. According to the results of calculations the transmission matrix of the examined object is got and the spectrum of Gershgorina of thermal fields of the considered furnace as object of management is investigated.
TECHNICAL SCIENCES
42-46 329
Abstract
Increased noise is one of the worst, dangerous and harmful production factors. As for circular machines it is mostly characterized by the degree of impact on the operators. Experimental studies of noise during operation of woodworking machines with circular saw blades of various designs have been carried out.
47-54 282
Abstract
The methods of operative checking the process of steam generation at the termal water purification plants on the heat electric stations in order to prevent emergency mode vaporizers are designed. The analysis of the test results of the quick-response device of checking steam quality is done.
55-63 325
Abstract
The results of the theoretical and experimental researches of final smoothing of details’ surface with the medium of organic origin are presented. The models for the estimation of quality of the surfaces and productivity of the process for expansion of technological possibilities of the vibrating processing of details with the help of this kind of medium are suggested.
64-69 315
Abstract
The analysis of the mechanisms of deterioration of abrasive actuating medium in-process made at vibrational abrasive machining and its agencies on its cutability is done. As primal problems on stabilisation of figures of merit of the workpieces caused by the condition of actuating medium have been inprocess determined. The outcomes of the experimental researches confirming drawn leading-outs are resulted.
70-75 287
Abstract
The results of the theoretical and experimental research of the original synchronized dualchambered hydromechanical system with indirect regulated valve systems of different structural configuration are shown.
76-79 277
Abstract
In this article the author presents information on the classification of efficient combined processing methods. The article shows their structure and kinds of forming influence upon a blank. The author also shows the area of effective combined methods usage in machine-building. In addition, the information on the experience of their practical adoption is given.
80-83 315
Abstract
Substantiation of graphical method of plotting the tooth root fillet curves of involute wheel teeth with large asymmetry of profiles suitable for construction of self-braking tooth gear drives of load-lifting machines is described. Inversion method is applied to obtain relative locations of the second mating gear teeth. The described fillet curve with due clearance covers the found complex of the second gear teeth positions.
84-90 294
Abstract
In the work influence of constructive and functional parameters of the unloading automatic machine with the differential valve on work quality of hydromechanical system of constant pressure is investigated.
91-94 283
Abstract
The method of reception of final volume set (FVS) of weight of average tension on small sample (n=5) by the simulation is offered. A computing experiment for weight average tension in the dangerous section of the dredge handle is carried out. The application of statistical simulation method by distribution of absolute spreads allows to receive interim aggregate of final volume on small sample for the subsequent definition of the Fisher-Tippet’s law parameters for FVS details with the weight average tension.
95-101 277
Abstract
Features of self-regulation of electrode wire fusion under the machine welding in the protective environment of argon and argon mixtures are investigated.
The mechanism of cyclic changes in the current and arc voltage is revealed.
Ways of stabilization of electrode fusion through the application of rigid static characteristics of feeding system and increase of the positive slope of the static characteristics of the arch are defined.
102-105 280
Abstract
In this article necessary and sufficient parameters for calculation of reliability of load-carrying constructions and running systems of mobile machines are defined. The analysis of experimental data of the peak dynamic stress arising at various operating modes in details of basic structural assembly of agro-technical machines is presented.
106-111 349
Abstract
A new method for estimation of long-term strength of constructional polymers is proposed. The method is based on the analysis of generalized kinetic and mechanical characteristics obtained by the synthesis of the kinetic strength theory and the creep theory.
112-120 429
Abstract
The subject matter of this article is the result of oxygen influence on oxidative wear of the carbide tool. Based on equation of entropy balance in theoretical dependence for the calculation of wear rate, the contribution of oxidation reactions of hard alloy metal components to the general mutual of metal cut-ting entropy is considered. Twin-layer coatings influence of carbide and nitride titanium on declination of oxidative wear is represented.
ECONOMIC SCIENCES
121-130 304
Abstract
Main principles of formation of modern economic administrative system are described. Some problems of management on the regional level in the post-transformational period are revealed. The calculation of economic efficiency of administrative activity of the Ministry of Agriculture and the Foodstuff of Rostov Region for the period of 2000-2007 with the prospective development is made.
131-138 256
Abstract
Forms of the organization of a raw stream of a feather-down manufacture in small business on the basis of two major directions are offered: logistical mediation and integration of the branch enterprises. Besides, their estimation from a position of influence on competitiveness of the enterprises by means of maintenance with raw material is made.
139-144 334
Abstract
Considering the elements of the financial sustainability of agricultural enterprises, the author has concluded that the proposed method of calculation of planned volumes of agricultural support can improve the validity of its budget planning.
CONCISE INFORMATION
145-147 305
Abstract
Fast parallel interface for metal-cutting lathes drives control is described.
ISSN 2687-1653 (Online)
