The following article deals with the survey techniques of sustainability properties of metal structures by destructive and non-destructive methods.
Keywords: "examination, strength, diagnosis, mechanical properties, nondestructive testing, pipe sheet pile design "
The paper describes the wireless network organization of accounting units of energy resources and water as a part of automated complex. Shows the architecture of the whole complex of accounting, recording and analysis of energy consumption. Were highlited the key points in terms of complex reliability. Was given the analysis of the various options for multiple access to the wireless media, described the advantages and disadvantages of each of them.
Keywords: automated system of control and accounting of energy resources, wireless technology, multiple access to the radio channel, energy accounting device.
The article proposes the derivation of resolving equations for the bending of triangular finite element of plate with regard to creep. In deriving of the equations we use Lagrange variational principle. The problem is reduced to a system of linear algebraic equations. Creep contributes only to the right side of the system of equations. These equations allow to calculate the plates of arbitrary shape, taking into account the viscoelastic properties of the material. An example of the calculation for a rectangular plate of a secondary polymeric PVC, hinged along the contour and loaded uniformly distributed over the area load is presented. As a law establishing a link between stress and creep deformation we used nonlinear equation of Maxwell-Gurevich. Calculations were performed in Matlab software package. The graphs of change in time of deflection and stresses are presented. Stress during creep vary slightly, a difference between the stresses at the beginning and end of creep process does not exceed 6%. The result of numerical calculation of the maximum deflection value at the end of creep is different from the theoretical on 0.26%.
Keywords: creep, finite element method, bending of plates, polymers, Maxwell-Gurevich equation, long cylindrical rigidity
Are given the results of studies on the creation of samouplotnyayushchikhsya fine-grained fibrobetonov on the withdrawals of lithotrity with the application of a polyfunctional additive D -5. Are developed the compositions of samouplotnyayushchikhsya fine-grained fibrobetonov with the application of a basaltic fibre, which make it possible to considerably decrease the expenditure of cement and to improve the characteristics of fine-grained concrete mixture and concrete. The use of a polyfunctional additive D -5 in the mixtures makes it possible to increase the strength properties of fine-grained fibrobetonov with a simultaneous improvement in the rheological characteristics of concrete mixtures. The replacement of cement to 10 % from the mass by ashes of fraction d0,14 mm in the fine-grained concrete mixtures does not cause noticeable reduction in the strength properties of concrete. Developed samouplotnyayushchiesya fine-grained fibrobetony possess the increased strength properties and have low prime cost due to the use of local raw material and withdrawals of lithotrity
Keywords: cement, the withdrawals of lithotrity, ashes, polyfunctional additive D -5, basaltic fiber, samouplotnyayushchiysya fine-grained fibrobeton, strength for the bend and the compression, the mobility of mixture, the plan of the experiment
The main target of sales policy in a competitive environment is customer funnel and customer loyalty. Sales approach involves encouragement of customers, vendors and business partners. Advertising is a means of a sales activity. While determining the most efficient way of distributing expenses for the purpose of advertising, it makes economic sense to use mathematical methods of programming and statistic analysis of target audience. It is able during the analysis to determine the most efficient time and location for ad placement, possible target audience and its income level. A method of calculating should be selected in order to gain more profit and incur less expenses. This is Fore and Malgrange method which allows to do so. Benefit of this method is optimality test in the process of decision making. Keywords: merchandising, advertising, sales, profit-making organization, sales approach, radio advertising, profit maximization.
Keywords: sales promotion, advertising, sales, social - demographic preferences, effective planning, profit maximization, the method Fore-Malgrange
The theme of self-presentation is particularly relevant in today's world, where a person has to exist in a large number of roles implemented them in different areas of life: in the family, at work, in the company, the political arena, and others. The development of skills of self-presentation, the adjustment of its strategies is important for staff management structure. Methodical toolkit: Methodology S.-ZH. Lee and B. Quigley measurement tactics self (Self-presentation tactics scale, S.-J. Lee et al.); Scale of self-monitoring M. Snyder (Self-monitoring scale, M.Snyder). The reliability of the results obtained in the study was provided by using the methods of mathematical statistics: the criterion U-Mann-Whitney test H Kruskal-Wallis test [3]. We used the program Statistica computer processing data 6.0.Strategii self differently distributed in groups of professions related to the different types of professions. The level of communicative control is different in severity presented in this study, groups of professions.
Keywords: Self-presentation, self-presentation strategies, self-selection strategies, communicative control artonomichesky type professions signonomichesky type occupations, professions socionomic type
The dynamic model of continuous distribution process allowing on the basis of sampling in time to reduce the corresponding generalized dynamic task to a problem of vector conditional optimization is considered. By means of optimization of weight coefficients of the scalar criteria encapsulated in criteria rollup on the basis of the generalized functional ratio expressing understanding of an intercriteria compromise the possibility of establishment of the most acceptable quantitative preferences between alternatives is shown. The offered approach allows to regulyarizirovat algorithms of dynamic planning for single-product distribution systems, having eliminated the developed obvious dependence of optimization process and results of adoption of multicriteria decisions on expert procedures and heuristic factors.
Keywords: distribution systems, dynamic processes, mathematical modeling, vector optimization, multicriteria decision making, parametrical rollup of criteria, alternatives and compromise
Privedeny rezul'taty sravnitel'nogo analiza dorozhnykh konstruktsiy na uchastkakh avtomagistraley M-4 i M11 po kriteriyu ustalostnogo razrusheniya. Predstavlen sopostavitel'nyy analiz rezul'tatov po predlagaemoy metodike, osnovannoy na summirovanii deformatsiy, nakaplivaemykh v pokrytii za ves' srok ekspluatatsii, i normativnoy metodike ODN 218.046-01.
Keywords: proektirovanie, nezhestkie dorozhnye odezhdy, asfal'tobetonnoe pokrytie, ustalostnaya dolgovechnost', raschet
Grinding particulate materials by means of impact is one of the most effective methods , especially when you want to obtain fine and superfine grinding . The most significant drawback - rapid and uneven wear on the blades and pneumatic organs. To solve this problem it was proposed to organize the interaction of shock . However, implementation of this method requires the establishment of methods for calculating the parameters of flow , as the incident on the bump , and ref"lected from it .
Keywords: crushing blow , collision, the diameter of the mill , the material particle , bump , flow , interaction, wear
Results of researches on improvement of quality of the brick made of clay Kagalnik-3 raw materials are presented. It is defined that raw materials contain a large number of particles less than 1 mm in size that complicates receiving press powder of the recommended granulometriya. In addition, because of high sensitivity of raw materials to drying, on samples there are drying cracks influencing durability and frost resistance. It is defined that for receiving qualitative products, except softer mode of drying, for increase in physico-mechanical characteristics it is necessary to add the mineral modifying additive to furnace charge, and to carry out preparation of press powder with preliminary plastic granulation of weight.
Keywords: clay raw materials, ceramic brick, semi-dry pressing, press powder, sensitivity to drying, advanced plastic recycling, granulation, modifying additive, strength, frost resistance
Currently, laser annealing are widely used to create a polycrystalline silicon film, which is promising for use in thin film solar cell, and transistors, liquid crystal displays and sensors due to recrystallization of amorphous and nanocrystalline silicon films. The study of morphology and surface conductivity of single-crystal silicon film on a glass substrate by laser annealing power. Laser annealing is carried Nd: YAG laser with a wavelength of 532 nm, speed of movement of the stage with a specimen of 5 mm/s and a laser power ranging from 34 to 86 watts. The laser beam was focused on the sample in the form of a narrow line width of 10 microns and 60 mm in length. The dependence of the size of the nanocrystals and the conductivity of silicon films on the power of the laser annealing radiation. It is shown that the power of the laser radiation in the range of 60 to 70 W is optimal for the best electrical parameters silicon film for the purpose of its use in high-performance thin-film solar cells.
Keywords: silicon film, laser annealing, surface morphology, electrical conductivity, thin film solar cell
Have been given the substantiation of the need for preliminary testing of concrete beams on the transverse force. Their goal is to determine the effect of inclined cracks formed at the operating load levels, on the efficiency of the composite reinforcement in the near support sections. The results of these tests, obtained with the shear span 1,5h0; 2h0 and 2,5 h0, that significantly affects the nature of inclined cracks. According to the results of an experiment formulated recommendations for the design of composite reinforcement.
Keywords: concrete, reinfrcement, reinforced concrete composite, CFRP, strengthening, crack, stress level, clamp, shear span, strength
The article examines the cognitive method of management of investment-construction complex in the conditions of crisis. Examines the factors influencing the choice of investment strategy, main directions of activities in the field of crisis management.
Keywords: Economics, organization and management in construction, management of the company.
The article presents a study on the determination of the resistance to accumulation of residual deformations of asphalt concrete, SMA-11 on the device dynamic tests (PDI) the advantage of these over asphalt concrete stone mastic asphalt concrete SMA-10 GOST 31015.
Keywords: asphalt concrete, stone mastic asphalt concrete mixture, the grain structure, sieve, fraction, residual strain
In the construction of linearly extended objects, there are difficulties related to the optimization of flows. This requires the rational distribution of construction machinery fleet. The stream will be optimal only in the case when all processes are performed optimally. Rational distribution of the fleet is that the volume of construction works between the machines assigned in accordance with their highest load. Thus the performance is improved when in-line method of construction, which, in turn, should reduce the cost of socially necessary labor per unit produced by this company products
Keywords: flow, construction, method, process, technology, roads, land, machinery