The analysis of results of works, which were carried out on the problem of oxidation and self-ignition of coal for improving accuracy of the program of investigation of coal self-ignition, was carried out.
The design of flat-oval profile steel tubes with the incomplete fins is investigated for use as heat transfer surfaces. Such surfaces have several important advantages: the material - carbon steel, manufacture of low-cost technology – contact welding of the fins on the tube; improved thermal efficiency as compared with steel tubes of round profile, aerodynamic drag of flat-oval tubes with incomplete fins for 40...50 % below the tube of round profile.
The theory of stability of multivariable nonlinear systems is extended allowing development of new design methods of control. The methods provide decomposition of the original system into the interconnected subsystems with the structural properties ensuring the local exponential stability of the composite system and quasi-independence of the subsystems’ processes along with the asymptotic linearization of one of them.
Conditions for creation of light emitting diodes working in electrical breakdown regime have been determined. The floatable technology have been used. Light emitting diodes obtained is possible to use as standards of power and spectral composition of radiation, and although for creation of sources of short light impulses. Constructions of these devices, laboratorial technology of their fabrication, elements of metrological support have been worked out.
Emitters on SiC-basis operating in the electrical breakdown regime have the following superior characteristics:
The information platform of scenario analysis in the form of the mathematical and software support of the decision of foresight problems of identification promising directions of development at the level of large enterprises, industries and regions is developed.
The program complex of calculation of reliability of non-failure operation of reconfiguring Fault-Tolerant Mulltiprocessing Systems (FTMS) by means of statistical experiment with the GL-models reflecting behavior of FTMS in a stream of refusals of their components is developed. The new mathematical grafo-logical models (GL-models) adequately reflecting reaction of FTMS to occurrence of refusals optimized for use in specialized system are offered.
Analysis shows modern design balloons from austenitic steels, which they characterizes lack resistance to corrosion in a hydrogen environment. This leads to a «hydrogen degradation» of the vessel wall and loss of hydrogen in environment deference. There exists an technology of manufacturing the protective barrier membranes by coating the inner wall of the silver gold and copper, stainless steel, can prevent the penetration of hydrogen through the walls of the cylinders and to ensure reliability during their operation.
The working out essence consists in creation of the specific mathematical apparatus intended for the decision of problems of optimization of operating conditions of a backbone network of the main ExtraHVAC transmission lines taking into account uniform distribution of parameters along length of such lines and estimation of features of wave processes by transfer on them of electric energy.
Conception of planning and arrangements of machine-tools of new generation is offered, the basic features of which followings:
- The genetic going is near classification, description, evolution of development and prognostication of machine-tools as to the difficult technical systems of prirodno-antropogenogo origin.
- The multilevel morphological going is near a construction and synthesis of the difficult technical systems.
- Application of framework thecal constructions of the bearings systems.
- Aggregate-module principle of arrangements.
Analysis of literature sources had shown that up-to-date state of miniaturization of electronic devices needs the development of new small-size cooling systems, which are capable to reject great heat fluxes. Within the bounds of this problem theoretical ground of advisability of using miniature heat pipes, thermosyphones and oscillating heat pipes in cooling systems for a wide range of powerful elements of microelectronic technics was found.
