High performance microprocessor system for eddy current defectoscope measurement signal processing

This article shows principles of development of the eddy current defectoscope data acquisition system. It describes goals of development of this system and main requirements for its characteristics. Also on basis of these requirements possible implementation of the device was suggested

Сопоставительный анализ эффективности и надежности применения пластинчатых и кожухотрубных теплообменных аппаратов на ЗАО «Томский приборный завод»

Вследствие экономических санкций к России поставка импортного теплоэнергетического оборудования становится затруднительной. Поэтому требуется замена пластинчатых теплообменников на кожухотрубные, что подтверждает практическую значимость этой проблемы.Due to economic sanctions to Russia, the supply of imported heat and power equipment becomes difficult. Therefore, replacement of plate heat exchangers with shell-and-tube heat exchangers is required, which confirms the practical importance of this problem

Региональные сейсмораз-ведочные работы с целью оценки перспектив нефтегазоносности разреза в зоне сочленения Усть-Тымской мегавпадины и Пайдугинского мегавала" (Томская область)

Объектом исследования является зона сочленения Усть-Тымской мегавпадины и Пайдугинского мегавала. Цель работы – проектирование сейсморазведки МОГТ-3D и сопутствующих работ для детального изучения нефтеперспективных залежей на исследуемой площади. Расчет проектно-сметной стоимости, анализ производственной и экологической безопасности, рассмотрение правовых и организационных вопросов обеспечения безопасности позволили завершить проект в соответствии с социальными и экономическими требованиями.The object of research is the junction area of Ust-Tym megabasin and Payduginsky megaswell. The calculation of the estimated cost, the analysis of industrial and environmental safety, the consideration of the legal and organizational safety issues allowed to complete the project in accordance with the social and economic requirements

Математическое и программное обеспечение классификации классов лесов по данным дистанционного зондирования Земли

Цель работы - создание математического и программного обеспечения для отнесения того или иного лесного сообщества конкретного региона России к одному из классов типов лесов. В процессе исследования проводился анализ предметной области и методы решения поставленной задачи, также рассматривались существующие на сегодняшний день аналоги распознавания классов растительного покрова со спутниковых изображений. Область применения: классификация типов лесов на спутниковых снимках и картах, проведение анализа текущего состояния лесных ресурсов, оценка влияния различных внешних факторов на лесные территории. Практическая значимость работы заключается в том, что в ней применена нечеткая модель, основанная на кластеризации, для решения поставленных в работе задач.The aim of this work is to create a software which can determine a class of the forest type of a particular forest community of one of the regions of Russia. In the process of the research a subject area and methods of problem solutions have been analyzed, also currently existing analogs of vegetation cover classes recognition from satellite images have been considered. Scope: a classification of forest types on satellite images and maps, an analysis of the current state of forest resources, an assessment of the influence of various external factors on forest areas. The practical significance of the work is about the fact that a fuzzy model based on clustering has been used to solve the tasks of the project

Proton -- Lambda Correlations in Central Pb+Pb Collisions at sqrt(s_{NN}) = 17.3 GeV

The momentum correlation between protons and lambda particles emitted from central Pb+Pb collisions at sqrt(s_{NN}) = 17.3 GeV was studied by the NA49 experiment at the CERN SPS. A clear enhancement is observed for small relative momenta (q_{inv} < 0.2 GeV). By fitting a theoretical model, which uses the strong interaction between the proton and the lambda in a given pair, to the measured data a value for the effective source size is deduced. Assuming a static Gaussian source distribution we derive an effective radius parameter of R_G = 3.02 \pm 0.20$(stat.)^{+0.44}_{-0.16}(syst.) fm.Comment: 14 pages, 9 figures, submitted to Phys. Rev.

Energy dependence of kaon-to-proton ratio fluctuations in central Pb+Pb collisions from sNN\sqrt{s_{NN}} = 6.3 to 17.3 GeV

Kaons and protons carry large parts of two conserved quantities, strangeness and baryon number. It is argued that their correlation and thus also fluctuations are sensitive to conditions prevailing at the anticipated parton-hadron phase boundary. Fluctuations of the $(\mathrm{K}^+ + \mathrm{K}^-)/(\mathrm{p}+\bar{\mathrm{p}})$ and $\mathrm{K}^+/\mathrm{p}$ ratios have been measured for the first time by NA49 in central Pb+Pb collisions at 5 SPS energies between $\sqrt{s_{NN}}$= 6.3 GeV and 17.3 GeV. Both ratios exhibit a change of sign in $\sigma_{\mathrm{dyn}}$, a measure of non-statistical fluctuations, around $\sqrt{s_{NN}}$ = 8 GeV. Below this energy, $\sigma_{\mathrm{dyn}}$ is positive, indicating higher fluctuation compared to a mixed event background sample, while for higher energies, $\sigma_{\mathrm{dyn}}$ is negative, indicating correlated emission of kaons and protons. The results are compared to UrQMD calculations which which give a good description at the higher SPS energies, but fail to reproduce the transition to positive values.Comment: 5 pages, 4 figure

Centrality dependence of proton and antiproton spectra in Pb+Pb collisions at 40A GeV and 158A GeV measured at the CERN SPS

The yields of (anti-)protons were measured by the NA49 Collaboration in centrality selected Pb+Pb collisions at 40A GeV and 158A GeV. Particle identification was obtained in the laboratory momentum range from 5 to 63 GeV/c by the measurement of the energy loss dE/dx in the TPC detector gas. The corresponding rapidity coverage extends 1.6 units from mid-rapidity into the forward hemisphere. Transverse mass spectra, the rapidity dependences of the average transverse mass, and rapidity density distributions were studied as a function of collision centrality. The values of the average transverse mass as well as the midrapidity yields of protons when normalized to the number of wounded nucleons show only modest centrality dependences. In contrast, the shape of the rapidity distribution changes significantly with collision centrality, especially at 40A GeV. The experimental results are compared to calculations of the HSD and UrQMD transport models.Comment: 25 pages, 12 figures, submitted to PR

System-size and centrality dependence of charged kaon and pion production in nucleus-nucleus collisions at 40A GeV and158A GeV beam energy

Measurements of charged pion and kaon production are presented in centrality selected Pb+Pb collisions at 40A GeV and 158A GeV beam energy as well as in semi-central C+C and Si+Si interactions at 40A GeV. Transverse mass spectra, rapidity spectra and total yields are determined as a function of centrality. The system-size and centrality dependence of relative strangeness production in nucleus-nucleus collisions at 40A GeV and 158A GeV beam energy are derived from the data presented here and published data for C+C and Si+Si collisions at 158A GeV beam energy. At both energies a steep increase with centrality is observed for small systems followed by a weak rise or even saturation for higher centralities. This behavior is compared to calculations using transport models (UrQMD and HSD), a percolation model and the core-corona approach.Comment: 32 pages, 14 figures, 4 tables, typo table II correcte

Antideuteron and deuteron production in mid-central Pb+Pb collisions at 158AA GeV

Production of deuterons and antideuterons was studied by the NA49 experiment in the 23.5% most central Pb+Pb collisions at the top SPS energy of $\sqrt{s_{NN}}$=17.3 GeV. Invariant yields for $\bar{d}$ and $d$ were measured as a function of centrality in the center-of-mass rapidity range $-1.2<y<-0.6$. Results for $\bar{d}(d)$ together with previously published $\bar{p}(p)$ measurements are discussed in the context of the coalescence model. The coalescence parameters $B_2$ were deduced as a function of transverse momentum $p_t$ and collision centrality.Comment: 9 figure