Наведено класифікацію підйомно-транспортних машин, описано специфіку їх колісного рушія. Розглянуто напрямки створення безаварійних шин колісного рушія та доведено доцільність використання масивних великоеластичних шин, замість традиційних пневматичних, на підйомно-транспортних машинах.

Приведена классификация подъемно-транспортных машин, описана специфика их колесного двигателя. Рассмотрены направления создания безаварийных шин колесного двигателя и доказана целесообразность использования массивных больших эластических шин, вместо традиционных пневматических, на подъемно-транспортных машинах.

We implement the impedance measurement technique (IMT) for characterization of interferometer-type superconducting qubits. In the framework of this method, the interferometer loop is inductively coupled to a high-quality tank circuit. We show that the IMT is a powerful tool to study a response of externally controlled two-level system to different types of excitations. Conclusive information about qubits is obtained from the read-out of the tank properties.

Індекс рубрикатора НБУВ: В317.232

Рубрики:

Статистика Фермі-Дірака

Шифр НБУВ: Ж26988 Пошук видання у каталогах НБУВ 

Індекс рубрикатора НБУВ: В379.226 + В379.271

Рубрики:

Тонкі шари напівпровідників

Електричні властивості

Шифр НБУВ: Ж16425 Пошук видання у каталогах НБУВ 

Індекс рубрикатора НБУВ: В349

Рубрики:

Інфрачервоні промені

Шифр НБУВ: Ж16425 Пошук видання у каталогах НБУВ 

Investigation of organic liquid phase electroluminescence (traditionally, the so-called "electro-chemiluminescence" or "electrogenerated chemiluminescence") is of special interest as a competitor for "liquid" and "solid" organic light emitted diodes (OLEDs). From the electrochemical point of view, chemiluminescence is a self-regenerating process providing high brightness light radiation due to recombination of oppositely charged dye radicals. Chemiluminescent displays have a competitive set of parameters: high light efficiency, low power consumption, low driving voltages, fast response time, high spatial resolution, very high optical transmission and wide operation temperature range. No polarizers or alignment layers are required. Samples of chemiluminescent displays, including matrix microdisplays and micromechanically made cells are available; its design and parameters are discussed in details. Theoretical and experimental investigations of thin film DC chemiluminescence phenomena are carried out. On the basis of obtained experimental results, the most important physical processes have been investigated: charge injection into solution and charge transfer by electrohydrodynamic flows. Further prospects of chemiluminescent display devices are discussed.

Electrochemical technologies have a high potential for display applications because of their cheapness and simplicity, easiness to scaling to large substrates and low-temperature nature. However, in major display technologies the oxide films should be deposited on transparent conductive substrate, usually ITO on glass. For dielectric substrates like glasses, a special technology of current control is applied to anodizing metal films, which changes the oxide porous structure in a final stage and prevents formation of metal islands. To transform the residual metal nanowires into oxide, a special fading process similar to anoding bonding can be done. Usually, high reactivity electrolytes are used in the anodizing process, which destroys ITO layers. We have analyzed chemical properties of ITO in various anodizing electrolytes and found some suitable reagents and compositions. A lot of functional layers can be created by anodizing. For example, different filters may be formed by filling the pores by ink jet printing. Porous oxides can have low refractive indexes - lower than any bulk material, and can be used as effective antireflective coatings. A titanium oxide cover film forms "self-cleaning" surface due to its semiconductor photonics properties and oxygen production.

A new approach to nanoporous silicon formation is proposed. Anomalies both in low current densities and low fluorine ion concentrations, which is lead to low uniformity of formed porous silicon, are under consideration. It is shown that at very low current densities and fluorine ion concentration high uniformity, high porosity nanoporous silicon layers can be created. Structural, electrical and optical properties of porous silicon formed in a wide range of current densities, doping levels of silicon substrates and fluorine concentrations are presented.

Narrow-gap mercury cadmium telluride thin films grown by MBE methods onto various substrates (HgCdTe/Si, HgCdTe/GaAs) were investigated as a piezoelectric heterostructure for IR detection. Mechanical stresses at the layer-substrate interface were analyzed. It was determined that for [310] oriented MCT-based structures under the anisotropic restriction of the deformation the nonzero shear components of the strain tensor arise and stress induced piezoelectric polarization is generated. Existence of the built-in electric field in the strained MCT-based heterostructure results in the spatial separation of the nonequilibrium carriers and the possibility of the room temperature detection of the IR radiation is realized.

Індекс рубрикатора НБУВ: В333.79 + В379.26

Рубрики:

Напівпровідникові властивості рідин

Механічні властивості монокристалів напівпровідників

Шифр НБУВ: Ж26988 Пошук видання у каталогах НБУВ 

Індекс рубрикатора НБУВ: В379.2.271.4

Шифр НБУВ: Ж41115 Пошук видання у каталогах НБУВ 

Індекс рубрикатора НБУВ: В379.24

Рубрики:

Оптичні властивості напівпровідників

Шифр НБУВ: Ж41115 Пошук видання у каталогах НБУВ 

Індекс рубрикатора НБУВ: Е60*739.17*551.322.6

Рубрики:

Загальна зоологія

Шифр НБУВ: Ж21341/а Пошук видання у каталогах НБУВ 

Індекс рубрикатора НБУВ: В382.904.280.51

Шифр НБУВ: Ж67522 Пошук видання у каталогах НБУВ 

Індекс рубрикатора НБУВ: В315.7

Рубрики:

Квантова електродинаміка

Шифр НБУВ: Ж67522 Пошук видання у каталогах НБУВ 

Purpose. Determining the increase of rock displacements nearby a pre-constructed dismantling chamber while a plow longwall approaching. Additional goal is to develop a technique for estimating the pressure created by failed rocks at different stages of mining. Methodology. Displacements around a pre-constructed dismantling chamber were studied in situ using tell-tale stations. Numerical simulation was carried out to determine the rock stress-strain state applying a plastic deformation model. The numerical procedure of strain accumulation was implemented at the sequential change of mined-out space while modeling. Areas of broken rocks (failure zones)were determined according to Hoek - Brown strength criterion. Numerical simulation was carried out concerning different geological conditions and excavation dimensions. The non-linear estimation method combining with multiple regression and variance analysis were used to build general regularities. Findings. The multi-variant calculations of stress-strain state change were carried out for different values of rock strength, coal seam thickness, mining depth and dismantling chamber size as well. The results were generalized for different geological conditions. The failure zone height and excavation contour displacements are represented as a function of factors mentioned above. Originality. New regularities were obtained relatively the increase of rock displacements nearby a dismantling chamber. A failure zone spreading was shown depending on rock properties. Convenient techniques were developed to calculate constitutive geomechanical characteristics and provide an adequate support design for dismantling chamber under various mining and geological conditions. Practical value. The set of formulas derived with regression method allows determining the main geomechanical characteristics and gives a simple technique to design the support of dismantling chamber. This is a background for developing the general standards related to dismantling chamber designing under Western Donbass geological conditions.

Purpose. Development of a design procedure of tooth bending durability upon incomplete tooth contact by a finite element method and its application for research of a stress state of tumbling mill open gearing. Methodology. Calculation of the stress state is carried out with the finite element method. At the first stage the design model is formed. Further the construction and discretization of gearing geometrical model is done taking into account an axis misalignment angle. Displacements and stress in a tooth gearing upon incomplete tooth contact are calculated. Received distribution diagrams of displacements and stress are used for calculation of tooth bending stress. Findings. The article is devoted to the development of a design procedure of tooth bending durability taking into account gearing errors. The current state of the issue of tooth bending durability calculation upon incomplete tooth contact is investigated. The factors having a significant impact on a gearing error are defined. It is shown that the greatest impact on tooth gearing durability has an inclination angle of teeth in the plane of teeth contact. The estimation of the value of total inclination angle of teeth of tumbling mill МШРГУ 4500 x 6000 is given. The design model for calculating the tooth bending durability upon incomplete tooth contact with the finite element method is proved. Comparison of the results of calculation by the developed technique and by the engineering of ISO 6336 - 1:2006, 6336 - 3:2006 is made. It is shown that the existing engineering technique does not consider the features of large-sized tooth gearings stress state technique enough. The correction factors which allowing adapting an engineering technique for calculating tooth bending durability upon incomplete tooth contact are calculated. Originality. Significant influence of the central plate on tooth bending durability is established. It is established that upon incomplete tooth contact the load is distributed linearly along the theoretical line of the contact. Practical value. The algorithm of a design procedure of tooth bending durability upon incomplete tooth contact with the finite element method is developed. The quantitative estimation of tooth bending durability of tumbling mill МШРГУ 4500х6000 open gearing is received.

Узагальнений енергетичний підхід (S-матричний формалізм Гелл - Мана та Лоу) та релятивістська теорія збурень із дірак-кон-шемівським нульовим наближенням та врахуванням обмінно-кореляційних і релятивістських поправок застосовано до вивчення автоіонізаційних резонансів у атомі берилію, зокрема, передбачено енергії та ширини ряду рідбергових резонансів. Наведено результати порівняння даних теорії, зокрема, для автоіонізаційного резонансу 2pnl з наявними експериментальними даними і результатами інших теорій, у тому числі, теорій Greene, Tully - Seaton - Berrington, Kim - Tayal - Zhou - Manson.

Новий теоретичний підхід до опису спектральних параметрів піонних атомів у збудженому стані з урахуванням релятивістських, радіаційних ефектів на основі рівняння Клейна - Гордона - Фока застосовано до вивчення енергетичних параметрів переходів між компонентами надтонкої структури. Як приклад застосування наданого підходу, наведено нові дані про енергії переходів між компонентами надтонкої структури переходів 5g-4f, 5f-4d в спектрі піоного азоту та проведено порівняння з відповідними теоретичними даними Trassinelli-Indelicato.

Індекс рубрикатора НБУВ: В333.263

Рубрики:

Взаємодія електромагнітних хвиль з плазмою

Шифр НБУВ: Ж67522 Пошук видання у каталогах НБУВ