Multicriteria Collision Risk Ranking of Aircraft by Data from an Onboard Radar Station

Journal of Communications Technology and Electronics - An option of multicriteria collision risk ranking of aircraft by data from an onboard radar station (OBRS) is proposed. This method can be...     

Method of Reversible Compression of Frames of Measurement Data Based on Parquet Partition

Bit space representation of measurement data is considered. A method and its associated algorithm for reversible geometric compression of measurement data frames are proposed. The algorithm is based on the conversion of a data frame into bit form with subsequent mapping onto a plane and partition into strictly homogeneous regions. Experimental results are presented showing that the proposed algorithm provides high overall compression efficiency..     

Turning of polymers with pulsed electromagnetic irradiation of the workpiece

The turning of Caprolon workpieces with irradiation by nanosecond electromagnetic pulses is proposed. This method softens the surface layer and so increases the cutting speed.     

Investigations of structural transformation within metal (austenite chromium-manganese steel) at the external surface of steam superheating tubes

The elemental composition of an altered layer at the external surface of a steam superheating tube of grade DI59 steel is investigated after long-term operation. It is shown that the layer is located between a scale and a matrix and depleted by silicon, manganese, copper, and chromium with the maximum oxidizer affinity, enriched by iron and nickel to 90%, and mainly composed of the α-Fe phase (ferrite) with the ferromagnetic properties. The layer formed as a result of selective oxidation and diffusion from the matrix into the metal scale with the less standard free energy of the formation of sulfides and oxides. A magnetic ferrite meter is used in the experimental investigation of the layer evolution by testing grade DI59 steel for heat resistance in air environment at temperatures of 585, 650, and 700°С for 15 × 10³ h; creep at a temperature of 750°С and a stress of 60 МPа; and long-term strength at temperatures of 700 and 750°С and stresses of from 30 tо 80 МPа. Specimens for tests are made of tubes under as-received conditions. The relationship between the ferrite phase content in the surface metal layer and the temperature and time of test is determined. The dependence is developed to evaluate the equivalent temperature for operation of the external surface of steam superheating tubes using data of magnetic ferritometry. It is shown that operation temperatures that are determined by the ferrite phase content and the σ phase concentration in the metal structure of steam superheating tubes with the significant operating time are close. It is proposed to use magnetic ferritometry for revelation of thermal nonuniformity and worst tubes of steam superheaters of HPP boilers.     

Application of the system of automated monitoring of the residual service life for the solution of the problems of operation of nuclear power plants with water-cooled water-moderated reactors

We generalize the software implementation experience for a SAKOR-M system of automated monitoring of the residual service life operating as a component of the systems of diagnostics of residual service life. The SAKOR-320 system introduced at the second power-generating block of the Rostovskaya nuclear power plant additionally includes the surface resistance thermometers, solves the inverse problem, takes into account the actual displacements of steam generators, computes the degree of fatigue growth of the defects, and evaluates the ultimate states according to the criteria of leak prior to failure.     

Bulges in shield pipes of a TM-104A boiler with amine water treatment at the Shatura State Regional Electric Power Plant

The state of the metal, oxide film, and sediments of shield (screen) pipes in the salt compartment of a TM-104A boiler operating with amine water treatment following damage by thermal bulges. It is shown that this damage is caused by excursions in the thermal flux onto components with high thermal resistance owing to sediments during firing. Recommendations are made for increasing operational reliability.