An approach to the calculation of the optimal values of the protective layer of longitudinally reinforced concrete columns, operating at a central compression. Modeling performed using FEM - Ansys package for the design and implementation of spatial models of flat section of the column.
Keywords: reinforced concrete column, longitudinal reinforcement, a protective layer of concrete, finite element method, critical load
The article deals with the analysis of intermittent lanes priority based on simulation. The implementation of intermittent lanes priority system is only possible within the framework of urban intelligent transportation system (ITS). In some cases, there are not always enough ITS components for the operation of intermittent lanes priority system. Based on the simulation it is possible to determine the efficiency of the intermittent lanes priority system with the minimum or complete number ITS components. To compare the effectiveness of intermittent lanes priority system the simulation was performed for the four scenarios:
1. Without the use of public transport priority
2. Classically marked priority lane
3. Using the intermittent lanes priority system with a minimum number of ITS components
4. Using the intermittent lanes priority system with the full amount of ITS components
According the results of simulation we concluded that the minimal intermittent lanes priority system is noticeably inferior to a fully functional intermittent lanes priority system on the effectiveness, but such system does not require a high level of development of the urban ITS and can be considered as the first stage of a complete intermittent lanes priority system.
Keywords: the organization of the bus lane priority, priority lane, intermittent bus lane priority, road capacity, controlled road signs, intelligent transportation system
The analysis of a current status of region transport system was carried out. Main problems of public transport system were revealed and the directions of their decision were determined. Author suggest to use the concept of a sustainable development for the purpose of creation of sustainable transport and logistic system (STLS). The main components were considered, the basic principles of creation of STLS were systematized. Result of research is the complex of managerial measures and strategy of STLS directed on forming.
Keywords: public transport, transport and logistic system, sustainable development, complex
The article discusses an innovative organizing method of the buses priority - a intermittent bus lane priority.
Keywords: the organization of the bus lane priority, priority lane, intermittent bus lane priority, intelligent transportation system
The paper examines the main approaches to the modeling of scientific and technical progress. Details the conditions and change the model postulates technological structure , its main provisions . Put tasks that are of great interest for scientists involved in the modeling of scientific and technological progress , and for economists who are interested in the practical application of these results . Values of other well-known models of STP . The variants of modernization and the possible synthesis of these approaches to modeling change tehnologichekogo order.
Keywords: scientific and technological progress, advanced technology, changing technological way of practical experience, the elasticity of factor capital
Is considered the main content of the possibilities for extending the services of the lifting cranes, on the basis of the definition of a residual resource of the machine. The algorithm is sampled( measurements) of the metal structures of cranes. A variant of transition from the hardness of steel to its strength.
Keywords: chapel strength, chapel, endurance, a residual resource, providing design, resource rationing, hardness
The work in the Internet is impossible without the use of search systems. The quality of the responses to user’s requests to a large extent depends on the keywords. However, due to some circumstances the user is not able to accurately enough to formulate a request and the number of received responses is great. In these situations, additional feature relevant answers selection can be text documents belonging to a particular implicit group. Implicitness group is shown in the fact that the text belongs to it is determined not by direct comparison with the reference (key) words, but by matching the semantic features, the wording of which is absent in the search text. Implementation of text classification can be made on the basis of the frequency characteristics of N-grams. The purpose of the work is to assess the possibility of using the frequency characteristics of N-gram of the websites text fragments to improve search engine based on a study of their information content. In this work designed a method based on the selection of informative indicators of N-gram with low computational requirements and with application of the correlation analysis. Based on its application has been shown that the frequency characteristics of N-grams have sufficient information content to improve search engines. The developed method has many common with systems of writing, because it relies not only on the alphabetic systems.
Keywords: N-gram, request, semantic features, search engine
The especially the functioning of fluid catalytic cracking plant are considered. A mathematical model of a catalytic cracking plant is presented here. Implemented model identification based on experimental data. The predictive controller based on predictive control method for dynamic processes is developed. Effectiveness of the approach is confirmed by the results of catalytic cracking plant simulation.
Keywords: catalytic cracking, modeling, model predictive control, multivariate control system, optimization
This paper presents the results obtained at simulation of various algorithms dynamic route guidance. A simulation experiments has been executed for the CBD network of Rostov-on-Don with using AIMSUN package. The main objectives of research are estimate routing strategy and relation between shape of the macroscopic fundamental diagram and traffic assignment on the network.
Keywords: re-routing, rate, dynamic traffic assignment, traffic conditions
In the implementation of dynamic re-routing of traffic it is important to notice that the threshold depends on the network layout and type of the roads. Full paper includes appropriate relationships, figures and analysis of simulation results to define the re-routing rate of dynamic traffic reroutig
Keywords: re-routing, rate, dynamic traffic assignment, traffic conditions
This article is devoted to the analytical determination of deflections of beams with corrugated web. The reduced shear modulus which must be considered when determining the components deflection from of the shear strain in the beam with corrugated web is defined. Applying the energy method in the form of the Ritz, the problem of determining deflections with considering of bending strain and shear strain is solved. This article, as an example, is considered simply supported beam on both sides of constant and variable cross-section and are given to the final formulas according with three kinds of loading. The results of the calculation of the numerical examples for the three main shapes of corrugated web are submitted. Numerical results with great accuracy are consistent with calculations based on the finite element method.
Keywords: beams, corrugated web, energy, work, deflection, shear strain
The presented work extends the state-of-art of visualization construction simulations in three dimensions (3D). Classical computer graphics methods can be used to instrument construction models to automatically generate dynamic visualizations of any construction models. The visualization problem of FEM analysis is considered. A description is presented of programs of convertation and visualization of results of finite element method analysis of geodesic domes.
Keywords: simulation, computer graphics, geodesic domes, finite element method, convertation, visualization
In the article the problems of color organizations of the urban environment and the value of professional skills of specialists working with color organization of the surrounding space. Volume of one article will not reliably accurately describe the problem and research in this area, more detailed information will be published in the monograph
Keywords: Color, colour modelling, color harmonization of environment, colorimeter, spectroscope.
Defined criteria for identification of defect parameters, on the basis of the analysis of the different modes of own fluctuations, with the use of finite element modal calculation console corpulent model of a rod with a single defect. Developed finite element model of a universal complex . Considered corpulent (3-d) model on the basis of 3D finite element Solid92. When solving the problem considered on 26 oscillation modes depending on the size of the defect and its location.
Keywords: Damaged, defective, swing, cantilever, frequency
Solution for high-speed video transmission in hydroacoustic channel by amplitude modulation with orthogonal subcarriers is specified. Results of method experimental check are presented. Discussed method is doppler-tolerant and can be realized in many common DSPs.
Keywords: hydroacousitcs, video transmission, amplitude modulation