Modification of the RLA model for presenting a cluster system of a composite material with a fractal filler structure

The paper proposes a modification of the diffusion-limited aggregation model to study the properties of a cluster system. A computational experiment to determine the mutual influence of the sticking probability and the volume concentration of particles on the formation of fractal clusters in a cluster system was carried out in accordance  with  the  second-order  orthogonal  central  compositional  plan  (OCCP).  As  a  result of a computational experiment in accordance with the OCCP, an equation was obtained for the dependence of the mass fractal dimension of clusters on the volume of particle concentration and the probability of adhesion of diffusing particles and cluster particles in the adhesion zone. This dependence was obtained in a range of volume concentration of particles from 2 to 5 % and the probability of adhesion of diffusing particles and particles of clusters in the adhesion zone from 0.2 to 1.The paper proposes a modification of the diffusion-limited aggregation model to study the properties of a cluster system. A computational experiment to determine the mutual influence of the sticking probability and the volume concentration of particles on the formation of fractal clusters in a cluster system was carried out in accordance  with  the  second-order  orthogonal  central  compositional  plan  (OCCP).  As  a  result of a computational experiment in accordance with the OCCP, an equation was obtained for the dependence of the mass fractal dimension of clusters on the volume of particle concentration and the probability of adhesion of diffusing particles and cluster particles in the adhesion zone. This dependence was obtained in a range of volume concentration of particles from 2 to 5 % and the probability of adhesion of diffusing particles and particles of clusters in the adhesion zone from 0.2 to 1

Modification of the RLA model for presenting a cluster system of a composite material with a fractal filler structure

The paper proposes a modification of the diffusion-limited aggregation model to study the properties of a cluster system. A computational experiment to determine the mutual influence of the sticking probability and the volume concentration of particles on the formation of fractal clusters in a cluster system was carried out in accordance with the second-order orthogonal central compositional plan (OCCP). As a result of a computational experiment in accordance with the OCCP, an equation was obtained for the dependence of the mass fractal dimension of clusters on the volume of particle concentration and the probability of adhesion of diffusing particles and cluster particles in the adhesion zone. This dependence was obtained in a range of volume concentration of particles from 2 to 5 % and the probability of adhesion of diffusing particles and particles of clusters in the adhesion zone from 0.2 to 1

Оптимизация статистической оценки получасового максимума нагрузки промышленного предприятия

The paper considers a problem pertaining to determination of a statistical estimation of the half-hour load maximum of an industrial enterprise on the criterion of a minimum of total expenses. The estimation is made on the basis of fractile optimization characterizing a corridor width of value uncertainty of the half-hour loadРассматривается задача определения статистической оценки получасового максимума нагрузки промышленного предприятия по критерию минимума суммарных затрат на основе оптимизации квантили, характеризующей ширину коридора неопределенности значений получасовой нагрузки

Lower soil moisture threshold for transpiration decline under water deficit correlates with lower canopy conductance and higher transpiration efficiency in drought-tolerant cowpea

As water availability is critical for reproduction, terminal drought tolerance may involve water-saving traits. Experiments were undertaken under different vapour pressure deficit (VPD) and water regimes (water stress (WS) and well watered (WW)) to test genotypic differences and trait relationships in the fraction of transpirable soil water (FTSW) at which transpiration declines, canopy conductance (proxied by transpiration rate (TR, g H2O cm–2 h–1)), canopy temperature depression (CTD, °C), transpiration efficiency (TE, g kg–1) and growth parameters, using 15 contrasting cowpea (Vigna unguiculata (L.) Walp.) genotypes. Under WW conditions at the vegetative and early podding stages, plant mass and leaf area were larger under low VPD, and was generally lower in tolerant than in sensitive genotypes. Several tolerant lines had lower TR under WW conditions and restricted TR more than sensitive lines under high VPD. Under WS conditions, transpiration declined at a lower FTSW in tolerant than in sensitive lines. Tolerant lines also maintained higher TR and CTD under severe stress. TE was higher in tolerant genotypes under WS conditions. Significant relationships were found between TR, and TE, CTD and FTSW under different water regimes. In summary, traits that condition how genotypes manage limited water resources discriminated between tolerant and sensitive lines. Arguably, a lower canopy conductance limits plant growth and plant water use, and allows tolerant lines to behave like unstressed plants until the soil is drier and to maintain a higher TR under severe stress, as lower TR at high VPD leads to higher TE

АНАЛИЗ И СИНТЕЗ ЦИФРОВЫХ СИСТЕМ АБОНЕНТСКОГО ДОСТУПА. СОСТОЯНИЕ И ПЕРСПЕКТИВЫ

Briefly main results of the researches on analysis and structured-parametric syntheses of digital systems of subscriber access, which were got in BSUIR, are stated. The main trends of researches are indicated and the variants of the structured-parametric syntheses of the digital systems, which use different technologies of transmition and telecommunications networks buildings, are represented. The analysis of the received results was done and the recommendations on practical use was developed on the grounds of this analysis. The trends for perspective researches are formulated.Кратко изложены основные результаты исследований по анализу и структурно-параметрическому синтезу цифровых систем абонентского доступа, полученные в БГУИР. Указаны основные направления исследований и приведены варианты структурно-параметрического синтеза цифровых систем, использующих различные технологии передачи и построения сетей связи. Проведен анализ полученных результатов, на основании которого разработаны рекомендации по практическому использованию. Сформулированы направления для перспективных исследований

ОПТИЧЕСКИЕ СВОЙСТВА КОМПЛЕКСОВ УЛЬТРАДИСПЕРСНЫХ АЛМАЗОВ ДЕТОНАЦИОННОГО СИНТЕЗА С ИНДОТРИКАРБОЦИАНИНОВЫМ КРАСИТЕЛЕМ

A method to create complexes of detonation nanodiamonds with molecules of an indotricarbocyanine dye was developed. The process of complex formation was shown to depend on the nanodiamond annealing conditions. Nanodiamonds that were vacuum annealed at 750oC display the most effective interaction with the dye molecules. Formation of the complexes was studied with the aid of optical spectroscopy in the visible and infrared regions.Разработан метод получения комплексов ультрадисперсных алмазов детонационного синтеза с молекулами индотрикарбоцианинового красителя. Показано, что на процесс комплексообразования влияют условия термической обработки наноалмазов. Наиболее эффективное взаимодействие с красителем проявляется для ультрадисперсных алмазов, отожженных в вакууме при 750оС. Процесс образования комплексов изучен методом оптической спектроскопии в видимой и инфракрасной областях

Bath Breakfast Project (BBP) - Examining the role of extended daily fasting in human energy balance and associated health outcomes: Study protocol for a randomised controlled trial [ISRCTN31521726]

<p>Abstract</p> <p>Background</p> <p>Current guidance regarding the role of daily breakfast in human health is largely grounded in cross-sectional observations. However, the causal nature of these relationships has not been fully explored and what limited information is emerging from controlled laboratory-based experiments appears inconsistent with much existing data. Further progress in our understanding therefore requires a direct examination of how daily breakfast impacts human health under free-living conditions.</p> <p>Methods/Design</p> <p>The Bath Breakfast Project (BBP) is a randomised controlled trial comparing the effects of daily breakfast consumption relative to extended fasting on energy balance and human health. Approximately 70 men and women will undergo extensive laboratory-based assessments of their acute metabolic responses under fasted and post-prandial conditions, to include: resting metabolic rate, substrate oxidation, dietary-induced thermogenesis and systemic concentrations of key metabolites/hormones. Physiological and psychological indices of appetite will also be monitored both over the first few hours of the day (i.e. whether fed or fasted) and also following a standardised test lunch used to assess voluntary energy intake under controlled conditions. Baseline measurements of participants' anthropometric characteristics (e.g. DEXA) will be recorded prior to intervention, along with an oral glucose tolerance test and acquisition of adipose tissue samples to determine expression of key genes and estimates of tissue-specific insulin action. Participants will then be randomly assigned either to a group prescribed an energy intake of ≥3000 kJ before 1100 each day or a group to extend their overnight fast by abstaining from ingestion of energy-providing nutrients until 1200 each day, with all laboratory-based measurements followed-up 6 weeks later. Free-living assessments of energy intake (via direct weighed food diaries) and energy expenditure (via combined heart-rate/accelerometry) will be made during the first and last week of intervention, with continuous glucose monitors worn both to document chronic glycaemic responses to the intervention and to verify compliance.</p> <p>Trial registration</p> <p>Current Controlled Trials <a href="http://www.controlled-trials.com/ISRCTN31521726">ISRCTN31521726</a>.</p