OPTIMUM NOMINAL METHOD MODIFICATION AT THE MANAGEMENT OF MOVING OBJECTS UNDER UNCERTAINTY

ABSTRACT The articleis devoted to the development of models and information support for the search of the input parameters providing effective functioning of a moving object in the incompleteness data conditions. The problem of optimization is solved by theapplication of fuzzy intervals and variables. Parameters of moving objects of autonomous navigation and function of optimization are considered in the form of linguistic and fuzzy variables. Experts set functions of the accessory of fuzzy variables. The concept of the function of the accessory of deviations from the set face value of input parameter is defined. Modification of the method of the optimum of face value is considered at management of moving objects in the conditions of uncertainty. The algorithm and information support is developed for search of the fuzzy maximum of the function of the productivity of autonomous navigation at management of moving objects. The description of work with information support is provided

HIGH EFFECTIVE SCINTILLATION ß-MONITOR

The results o f development of high effective scintillation ß-monitor are presented. The structure and some o f the most important characteristics of ß-monitor are described

Possibilities of improving contrast for the measurements of the 131I volume concentration by scintillation γ-spectrometers

The main problem of measuring the 131I volume concentration (364-keV g-line) with gamma spectrometers with low-resolution scintillation detectors (NaI:Tl, CsI:Tl) is due to the overlap with the Compton edge (384 keV) from the attendant radiation of 76As. The problem can be largely eliminated by improving the energy resolution of the spectrometer, increasing the volume of the crystal, or using an anti-Compton spectrometer. Using the Monte Carlo simulation (GEANT4 package), the last two methods of increasing the contrast of instrumental energy spectra were investigated. It was found that an 8-fold increase in the scintillator volume improves the ratio of the 131I peak area to the area of the Compton continuum below it from the 76As radiation only by 1.42 times. Therefore, the main attention was paid to the comparative studies of the constructions of anti-Compton detectors based on CsI:Tl crystals in a detector-analyzer and a detector-protector. Several designs of anti-Compton detectors suitable for harsh application conditions at nuclear power plants were proposed. In the first of them, the protector crystal is in the form of a disk with a diameter equal to the diameter of the crystal analyzer, and in the second - in the form of a “glass” put on the crystal analyzer. The thickness of the protector crystals in both cases was 10 mm. The expected improvement in contrast with respect to the single-crystal design was up to 3 or more times. Modern nuclear electronics and computers make possible the successful application of this method in industrial spectrometric installations. The contrast of the resulting spectra could be increased by an order of magnitude or more in comparison with the simple anticoincidence spectra.Основная проблема измерения объемной концентрации 131I (g-линия 364 кэВ) гамма-спектрометрами со сцинтилляционными детекторами низкого разрешения (NaI:Tl, CsI:Tl) обусловлена перекрытием с комптоновским краем (384 кэВ) от сопутствующего излучения 76As. Проблема может быть в значительной степени устранена улучшением энергетического разрешения спектрометра, увеличением объема кристалла или использованием антикомптоновского спектрометра. С применением моделирования методом Монте-Карло (пакет GEANT4) были исследованы два последних способа увеличения контрастности аппаратурных энергетических спектров. Выяснено, что 8-кратное увеличение объема сцинтиллятора улучшает отношение площади пика 131I к площади комптоновского континуума под ним от излучения 76As лишь в 1.42 раза. Поэтому основное внимание было уделено сравнительным исследованиям конструкций антикомптоновских детекторов на основе кристаллов CsI:Tl в детекторе-анализаторе и детекторе-протекторе. Предложены варианты конструкций антикомптоновских детекторов, пригодных для жестких условий применения на АЭС. В первой из них кристалл-протектор в виде диска с диаметром равным диаметру кристалла-анализатора, а во второй – в виде “стакана”, надеваемого на кристалл-анализатор. Толщина кристаллов-протекторов в обоих случаях равна 10 мм. Ожидаемое улучшение контрастности по отношению к однокристальной конструкции может достигать трех и более раз. Намечены направления дальнейшего совершенствования двухкристальных спектрометров, предназначенных для мониторирования содержания в воздухе радионуклида 131I. Наиболее перспективным представляется известный с 1960-х годов аппаратно-программный метод, использующий вычитание из спектра антисовпадений (антикомптоновский спектр) части спектра совпадений. Современные ядерная электроника и компьютеры делают возможным успешное применение этого метода в промышленных спектрометрических установках. Контрастность результирующих спектров может быть увеличена на порядок и более по сравнению с простыми спектрами антисовпадений

Компьютерная томография высокого разрешения в диагностике патологии легких при дисплазии соединительной ткани

Summary. This article presents results of examination of 50 young patients with connective tissue dysplasia not having any acute or chronic respiratory disease. All patients underwent inspiratory and expiratory helical CT with density gradient determination in different parts of the lungs. Typical CT findings were subpleural apical bullae and bleby (16 %), peribronchial fibrosis (40 %), local fibrosis (18 %), plevroapikal spikes (62 %), emphysema (4 %), air traps (18 %). The density gradient between exhalation and inhalation was reduced in the upper and lower lobes of the lungs.Резюме. В статье представлены результаты обследования 50 лиц молодого возраста с признаками дисплазии соединительной ткани, не имеющих острой или хронической бронхолегочной патологии. Всем пациентам выполнена инспираторно-экспираторная мультиспиральная компьютерная томография (КТ) органов грудной клетки с определением градиента денситометрических показателей в различных отделах легких. Типичными КТ-находками явились субплевральные апикальные буллы и блебы (16 %), перибронхиальный фиброз (40 %), локальный фиброз (18 %), плевроапикальные спайки (62 %), участки центриацинарной эмфиземы (4 %), воздушные ловушки (18 %). Выявлены особенности изменения градиента плотности легочной ткани в виде относительного снижения в верхних и нижних отделах легких

Virus nomenclature below the species level : a standardized nomenclature for laboratory animal-adapted strains and variants of viruses assigned to the family Filoviridae

The International Committee on Taxonomy of Viruses (ICTV) organizes the classification of viruses into taxa, but is not responsible for the nomenclature for taxa members. International experts groups, such as the ICTV Study Groups, recommend the classification and naming of viruses and their strains, variants, and isolates. The ICTV Filoviridae Study Group has recently introduced an updated classification and nomenclature for filoviruses. Subsequently, and together with numerous other filovirus experts, a consistent nomenclature for their natural genetic variants and isolates was developed that aims at simplifying the retrieval of sequence data from electronic databases. This is a first important step toward a viral genome annotation standard as sought by the US National Center for Biotechnology Information (NCBI). Here, this work is extended to include filoviruses obtained in the laboratory by artificial selection through passage in laboratory hosts. The previously developed template for natural filovirus genetic variant naming ( //<year of sampling>/-) is retained, but it is proposed to adapt the type of information added to each field for laboratory animal-adapted variants. For instance, the full-length designation of an Ebola virus Mayinga variant adapted at the State Research Center for Virology and Biotechnology “Vector” to cause disease in guinea pigs after seven passages would be akin to “Ebola virus VECTOR/C.porcellus-lab/COD/1976/Mayinga- GPA-P7”. As was proposed for the names of natural filovirus variants, we suggest using the fulllength designation in databases, as well as in the method section of publications. Shortened designations (such as “EBOV VECTOR/C.por/COD/76/May-GPA-P7”) and abbreviations (such as “EBOV/May-GPA-P7”) could be used in the remainder of the text depending on how critical it is to convey information contained in the full-length name. “EBOV” would suffice if only one EBOV strain/variant/isolate is addressed.This work was funded in part by the Joint Science and Technology Office for Chem Bio Defense (proposal #TMTI0048_09_RD_T to SB).http://www.springerlink.com/content/0304-8608/hb2013ab201

Stability Of A Linear Oscillator With Variable Parameters

. A criterion of asymptotic stability for a linear oscillator with variable parameters is obtained. It is shown that this criterion is close to a necessary and sufficient conditions of asymptotic stability. An instability theorem is proved, and a mechanical example is considered. 1. Introduction Consider an oscillator described by the following differential equation x + f(t) x + g(t)x = 0 ; (1) where the damping and rigidity coefficients f(t) and g(t) are continuous and bounded functions of the time t. Most of the theories examining a stability problem of the zero solution are based on the Lyapunov stability and instability theorems and the corresponding Lyapunov function is assumed as an energy-type function V = 1 2 c 1 (t) x 2 + 1 2 c 2 (t)x 2 ; where c 1 (t); c 2 (t) are time variable functions. In [6], A. P. Merkin considered the case c 1 (t) = c 2 (t) = 1 and stability conditions were obtained only for constant f and g. An extension was done in [15] for periodic functio..

KINEMATIC MODEL OF TWO-LAYER PLATES WITH THE REINFORCING LAYER FROM THE COMPOSITE MATERIAL

In the article, the kinematic model of deformation of a bent two-layer plate one of which is a composite lay, having low shift rigidity is under construction. The model considers deformations of cross-section shift of one of layers of a two-layer plate, thus deformation of other layer submits to a classical hypothesis of direct normal