scholarly journals CREATION AND EXPERIMENTAL TESTING UNIVERSAL SYSTEM OF ENVIRONMENTAL DIAGNOSTICS HEAT ENGINES AND BOILER INSTALLATIONS

2019 ◽  
Vol 3 (149) ◽  
pp. 77-82
Author(s):  
A. Polivyanchuk ◽  
M. Smirny ◽  
O. Kaslin ◽  
O. Skuridina ◽  
Y. Kovalenko ◽  
...  
Keyword(s):  
Gasoline Engine ◽  
Experimental Testing ◽  
Direct Determination ◽  
Measuring System ◽  
Experimental Sample ◽  
Universal System ◽  
Heat Engines ◽  
National University ◽  
High Degree

A description is given of an experimental sample of a universal system for the environmental diagnosis of heat engines and boiler installations, which was developed at the Department of Environmental Engineering of the O.M. Beketov National University of Urban Economy in Kharkiv. The properties of this system are: multi-functionality, compactness, mobility, ease of operation, a high degree of automation, informative results, ability to solve both research and training tasks. The structure, composition and functionality of the main modules of this system are considered: 1) measuring, which contains microtunnels МКТ-2, instruments and equipment for direct determination of indicators of chemical and physical pollution of the environment; 2) testing and demonstration, which consists of: installations for research of aerodynamic processes in exhaust systems of engines and boiler chimneys, laboratory transformer rack for mounting various test benches, a multimedia complex equipped with a tablet PC and an SMART information panel with a diameter of 43 " to demonstrate the operation of devices, equipment, programs, research results, etc.; 3) laboratory, which contains laboratory devices, equipment and consumables for the analysis of samples taken during environmental studies of natural objects. Normalized methods and techniques that allow to determine indicators characterizing chemical and physical pollution of the environment by heat engines and boiler installations are defined and systematized. Experimental testing of the created measuring system on full-scale objects: a gasoline engine of a passenger car - VAZ-21081 and automotive diesel engines - 4ЧН12 / 14, boilers with gas - DKVR-20/13 AOGV-100E and solid-fuel - КЧМ-2М-4 boilers. Tests confirmed the practical suitability of the measuring system.

The use of a high-speed digital computer for the direct determination of crystal structures. II

1957 ◽  
Vol 243 (1233) ◽  
pp. 281-288 ◽  
Keyword(s):  
High Speed ◽  
Electronic Computer ◽  
Direct Determination ◽  
Preceding Paper ◽  
Contour Maps ◽  
Unknown Structure ◽  
New Criterion ◽  
High Degree ◽  
Selection Of

This paper discusses some possible procedures for crystal structure determination using the X criterion developed in the preceding paper of the series. In that paper it was shown that, under favourable circumstances, the signs of the largest terms in the Fourier series representa­tion of ρ , the electron density in the unit cell, can be determined directly. The magnitudes of these terms can be found by experiment. In less favourable cases the correct set of signs, to a high degree of probability, lies among several hundred possible sets which can be determined by the processes described. A new criterion is proposed for selection of a lesser number, say a dozen, ‘most probable’ sets of signs. These latter sets can be tested by inspection of the corre­sponding contour maps of ρ . The new criterion has been successfully used in determining the unknown structure of nitroguanidine. Techniques for the selection of most probable sets and also for evaluation of ρ at suitable points in space using an electronic computer, the EDSAC, are described.

scholarly journals Measuring system for direct determination of plasma parameters based on a symmetric dual Langmuir probe (SDLC)

2002 ◽  
Vol 8 (2s) ◽  
pp. 207-212
Author(s):  
V.P. Nokel ◽  
◽  
V.M. Nikolaenko ◽  
Yu.S. Yampolsky ◽  
K.Ya. Mamedov ◽  
...  
Keyword(s):  
Langmuir Probe ◽  
Direct Determination ◽  
Measuring System ◽  
Plasma Parameters

Feasibility of Molecular Structure Determination With a High Resolution Electron Microscope

1968 ◽  
Vol 26 ◽  
pp. 338-339
Author(s):  
T. A. Welton
Keyword(s):  
Electron Microscope ◽  
Substrate Surface ◽  
Helical Axis ◽  
Base Plane ◽  
Resolution Electron ◽  
High Resolution Electron Microscope ◽  
High Degree ◽  
Degree Of Order ◽  
Purine Pyrimidine

An ultimate design goal for an improved electron microscope, aimed at biological applications, is the determination of the structure of complex bio-molecules. As a prototype of this class of problems, we propose to examine the possibility of reading DNA sequence by an imaginable instrument design. This problem ideally combines absolute importance and relative simplicity, in as much as the problem of enzyme structure seems to be a much more difficult one.The proposed technique involves the deposition on a thin graphite lamina of intact double helical DNA rods. If the structure can be maintained under vacuum conditions, we can then make use of the high degree of order to greatly reduce the work involved in discriminating between the four possible purine-pyrimidine arrangements in each base plane. The phosphorus atoms of the back bone form in projection (the helical axis being necessarily parallel to the substrate surface) two intertwined sinusoids. If these phosphorus atoms have been located up to a certain point on the molecule, we have available excellent information on the orientation of the base plane at that point, and can then locate in projection the key atoms for discrimination of the four alternatives.

The Direct Determination of I131 in Heterogeneous Fecal Specimens

1961 ◽  
Vol 41 (4) ◽  
pp. 380-384 ◽  
Author(s):  
Arthur F. Dratz ◽  
James C. Coberly
Keyword(s):  
Direct Determination

A New Method for Direct Determination of the Recoilless Fraction with Application to Magnetic Nanoparticles

2002 ◽  
Vol 721 ◽  
Author(s):  
Monica Sorescu
Keyword(s):  
Room Temperature ◽  
Average Particle Size ◽  
Direct Determination ◽  
Average Particle ◽  
Lattice Method ◽  
Recoilless Fraction ◽  
Single Room ◽  
Magnetite Particles ◽  
Physical Mixtures

AbstractWe propose a two-lattice method for direct determination of the recoilless fraction using a single room-temperature transmission Mössbauer measurement. The method is first demonstrated for the case of iron and metallic glass two-foil system and is next generalized for the case of physical mixtures of two powders. We further apply this method to determine the recoilless fraction of hematite and magnetite particles. Finally, we provide direct measurement of the recoilless fraction in nanohematite and nanomagnetite with an average particle size of 19 nm.

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