АВТОМАТИЧЕСКАЯ ИЗМЕРИТЕЛЬНАЯ ИНФОРМАЦИОННАЯ СИСТЕМА ДЛЯ ИССЛЕДОВАНИЯ РАЗРЫВНЫХ И ПЛАВНО ИЗМЕНЯЮЩИХСЯ ТЕЧЕНИЙ

The purpose of the paper is to present an automatic Measuring Information System (MIS) which has been developed at the BNTU in collaboration with the BSU and demonstrate its application in experimental investigations of kinematics and dynamics of discontinuous and smoothly changing flows, particularly, for more complete account of dynamic wave action on objects located in the hydraulic construction downstream.Цель статьи – представить созданную в БНТУ совместно с БГУ автоматическую измерительную информационную систему (ИИС) и ознакомить с возможностями ее применения в экспериментальных исследованиях кинематики и динамики разрывных и плавно изменяющихся течений, в частности для более полного учета динамического воздействия волн на объекты в нижних бьефах гидросооружений

ЭКСПРЕСС-МЕТОДИКА БЕСКОНТАКТНОГО ИЗМЕРЕНИЯ ЭЛЕКТРИЧЕСКИХ ПАРАМЕТРОВ НЕБОЛЬШИХ ОБРАЗЦОВ НА СВЕРХВЫСОКИХ ЧАСТОТАХ

The setup with a reflective microwave H101 resonator for the non-contact measurements of the electrical parameters of compact samples (the diameter less than 5 mm) is constructed. An analytical expression for calculation of the microwave power reflection coefficient by the H101 resonator with the sample being inside the resonator with respect to the dielectric permittivity and conductivity of sample is obtained. The dependence of the microwave power reflection on the diameter of the metallic and glassy globs freely falling through the resonator is experimentally found. an>Разработана установка с  отражательным  СВЧ-резонатором  типа  H101 для  бесконтактного измерения электрических параметров небольших (диаметром ≤ 5 мм) образцов. Получено аналитическое выражение для расчета коэффициента отражения мощности СВЧ-излучения H101-резонатором с находящимся в нем образцом в зависимости от диэлектрической проницаемости и электропроводности образца. Экспериментально найдена зависимость отражения СВЧ-мощности от диаметра металлических и стеклянных шариков при их свободном падении через резонато

FAST METHOD OF NON-CONTACT MICROWAVE MEASUREMENTS OF ELECTRICAL PARAMETERS OF COMPACT SAMPLES

The setup with a reflective microwave H101 resonator for the non-contact measurements of the electrical parameters of compact samples (the diameter less than 5 mm) is constructed. An analytical expression for calculation of the microwave power reflection coefficient by the H101 resonator with the sample being inside the resonator with respect to the dielectric permittivity and conductivity of sample is obtained. The dependence of the microwave power reflection on the diameter of the metallic and glassy globs freely falling through the resonator is experimentally found. an&gt

Vapor Pressures, Densities, and PC-SAFT Parameters for 11 Bio-compounds

One major sustainable development goal is to produce chemicals and fuels from renewable resources, such as biomass, rather than from fossil fuels. A key part of this development is data on the properties of chemicals that appear in this bio-based supply chain. Many of the chemicals have yet to be studied thoroughly, and data on their properties is lacking. Here, we present new experimental data on the properties of 11 bio-compounds, along with PC-SAFT parameters for modeling their properties. The measured data includes vapor pressures, compressed densities, and refractive indexes. The 11 bio-compounds are tetrahydrofuran, 2-pentanone, furfural, 2-methoxy-4-methylphenol, 2-methylfuran, dihydrolevoglucosenone, cyclopentyl methyl ether, 2-sec-butylphenol, levoglucosenone, γ-valerolactone, and 2,6-dimethoxyphenol.Peer reviewe