This paper considers mathematical modeling of inductive machine learning Most important mathematical models and their relations to practical realizations of algorithms are reviewed. The basic characteristics of some best known systems and one author's system for inductive rules learning are described and some examples of using systems in prediction tasks are presented.
One of demands for modern designed 1C engines is low fuel and lubricant consumption because of reasons concerning ecology as well as energy and economy. The symptom is that conventional 1C engines will be the first choice as a power source for numerous applications in the future. Therefore many changes and improvements in design need to be done for further decrease of fuel consumption followed by the decrease of exhaust emission. First of all, there is the optimization of the working cycle, the application of variable compression, the application of variable valve control, better couplina with gas machines, etc. Significant potential for efficiency improvement of 1C engines is in reducing mechanical losses. Mechanical losses in 1C engines are caused mostly by friction between the mobile parts of the engine (piston-cylinder assembly). Therefore, continual attention to the research process of studying friction problems would be necessary.
The one-factor plan of the performed experiment gave us a chance to analyze all starting parameters that appear in the process of two-phase flow in the tube of the automatic riffle. Here we present a comprehensive plan of the factory experiment starting mass of powder with chosen parameters and analyze their effects on the outgoing characteristics. A complete analysis (depressive and regressive) is performed for the maximum pressure of powder gases and the starting speed of the projectile, as very important outgoing characteristics of any weapon.
In this paper a definition of logistic controlling in logistic systems has been given. The basic functions of logistic controlling are shown as well as its place and role in managing modern logistic systems. It is clearly shown how some other authors define the notion and the functions of logistic controlling in modern logistic systems.
The paper analyzes the effects of bonding agents on mechanical properties and viscosity of composite rocket propellants based on hydroxiterminated polybutadiene and toluendiizocyanate, i.e. izophorondiizocyanate. The efficiency of bonding agents (BA) of different structure has been compared including triethylentetramine (TET), tris-(2-methyl azyrinidile) phosphine oxide (MAPO) and N, N-di (2-hydroxiethyl)-4,4-dimethylhydantoine (DHE). The BA efficiency has been determined on the basis of parameters obtained by uniaxial tensile tests (σm - tensile strength at maximum force, εm - relative allongation at maximum force and εp - relative allongation at fracture). The mechanical properties have been measured at the temperature range from -50°C to 50°C. The BA effects on propellant viscosity change rates have been analyzed.
The investigation included studies of catalytic activities of ballistic modificators and the process of burning of double base propellants. Burning of solid rocket propellants in one of the most complex types of burning. As it is known, any kind of burning is presented by chemical reactions and therefore chemical kinetics should play the basic role in the theory of burning. But, in rocket motors, burning is often complex and its character is change enable. The laws of chemical kinetics, therefore yield before the laws of thermal conduction and gas-dynamics.
Military motorized columns on the move cause various obstructions to other participants in the traffic. Military motorized columns are usually composed of cargo vehicles with low dynamic characteristics which cannot entirely take advantage of highways as functional road network elements with the best technical and exploitation characteristics. Due to relatively low speed of columns on the move, there is a need for passing them. The process of passing columns on highways was analyzed from the standpoint of lost time in the traffic flow and the number of obstructed vehicles.
Today
Yesterday
This week
This month
All days
Number of views: 276