Індекс рубрикатора НБУВ: Р668.62с03

Шифр НБУВ: Ж14161 Пошук видання у каталогах НБУВ 

Індекс рубрикатора НБУВ: К345.1

Рубрики:

Металургія тугоплавких металів

Шифр НБУВ: Ж14161 Пошук видання у каталогах НБУВ 

Запропоновано новий підхід до розв'язання задачі розпізнавання в гібридних кореляторах. В основу методу покладено know-how - принцип перетворення даних про інтенсивність чи амплітуду поля об'єкта розпізнавання в припущенні, що ці дані можна ввести в ЕОМ. Даний принцип дозволяє уніфікувати вид кореляційних функцій і вирішити проблему відбору ознак розпізнавання єдиним чином, що не залежить від того, до якого класу об'єктів належить об'єкт, що підлягає ідентифікації. Наведено експериментальні результати.

Індекс рубрикатора НБУВ: В343.43в641.8

Шифр НБУВ: Ж16425 Пошук видання у каталогах НБУВ 

A new iterative Fourier transform method of synthesis of kinoforms is presented. Two object-depended filters (an amplitude filter and a phase one) are used in the object plane on the iterative calculation of a kinoform instead of a single (phase) filter as usual. The amplitude filter is a system of weight coefficients that vary in the process of iterations and control the amplitude of an input object. The advantages of the proposed method over other ones are confirmed by computer-based experiments. It is found that the method is most efficient for binary objects.

Індекс рубрикатора НБУВ: Е60*725

Рубрики:

Загальна зоологія

Шифр НБУВ: Ж21341/а Пошук видання у каталогах НБУВ 

Індекс рубрикатора НБУВ: Д473-64

Рубрики:

Мінеральні (лікувальні) води

Шифр НБУВ: Ж100357 Пошук видання у каталогах НБУВ 

By small angle X-ray scattering (SAXS) and atomic force microscopy characteristic sizes are determined, structural features of thin iron films deposited by magnetron evaporation onto substrates from pyroceramics are established. It is shown that morphologically the film is characterized by disorder. It is formed from columnar nano crystallites that are oriented either perpendicular to the substrate or situated in its plane, which dictates polydispersity of those coatings. It is shown that SAXS may be thought of as nondestructive technique for analyzing structure and composition and conducting quality control of magnetron films.

Індекс рубрикатора НБУВ: В371.236 + В371.7

Шифр НБУВ: Ж100357 Пошук видання у каталогах НБУВ 

The influences of carbon additive on the structure and phase composition of the positive electrode material as well as technical and operational characteristics of starter lead-acid batteries have been studied. The mechanism of interaction of carbon additives with lead powder is proposed. It is established that the presence of carbon in the positive electrode material increases the lifetime of lead-acid starter batteries, as confirmed by tests.

The effectiveness and feasibility of producing nanoscale carbon materials from renewable bioresources were shown as an example marsh mass. The mechanisms of synthesis of amorphous organic carbon from sphagnum moss species modified by a liquid peat phase of humic nature are discussed. A fundamentally new way of producing carbon nanotubes by mechanical activation of amorphous organic carbon is described.

The influence of carbon black, red lead and polyaniline additives on the structure and functional characteristics of automotive lead-acid batteries has been studied. The mechanisms contributing to the formation both of lead dioxide by the introduction of these additives and of additional conductive nanostructured cross-linking channels in the case of polyaniline are described.

Індекс рубрикатора НБУВ: Г562.2

Рубрики:

Водні розчини

Шифр НБУВ: Ж100357 Пошук видання у каталогах НБУВ 

The efficiency of carbon nanotubes produced by CVD-method on a nickel catalyst at a protection from microwave radiation is shown. These data are confirmed by scanning electron microscopy, energy dispersive X-ray analysis and spectral analysis of the microwave radiation in the frequency range 26 - 40 GHz. The observed value of the transmission coefficient S21, up to - 42,7 dB, is in agreement with considered possible absorption mechanisms of electromagnetic wave energy in carbon nanoscale systems "CNT-nickel nanoparticles. The application of carbon powder materials in shielding of electromagnetic radiation has been theoretically justified.

The investigation results of nanoscale phenomena and structural changes due to shock localized impacts at electric discharges on thin metal films from copper and chrome are given. Mechanisms of shapeformation of concentric circles within discharge area and ordered nanoparticle aggregates on film surfaces are provided.

The velocity of domain wall in iron borate and yttrium orthoferrite as a function of a driving alternating magnetic field with a constant magnetic field present is experimentally investigated.

Thermal-physics and hydrodynamic processes are analyzed that appear in laser processing in mineral raw materials and technogenic products with ultradispersed inclusions of noble metals. It is established that laser processing of these materials is accompanied by the processes of defragmentation, thermocapillary extraction, and agglomeration of micro- and nano inclusions of noble metals.

The results of experimental studies of the interface of "dielectric liquid - nanostructured metal electrode" after electroconvection is presented. It is discovered the patterns of structuring of areas of polymerization showing disruption of the diffusion layer and the processes of charge injection from the tops of structures.

RF-magnetron nonreactive sputtering method from solid-phase target in argon atmosphere was used for obtaining thin silicon carbide and silicon nitride films, that are used for constructing solar cells based on substrates of single crystal silicon of p-type.

It is found that the chemical composition of the metal component of nanocomposites satisfies the Fe:Co ratio, that was set on at the stage of preparation of the precursor, wherein there is a slight deviation from the initial metal concentration, due, apparently, to removing metal from the nanocomposite by the formation of volatile carbonyls of iron and cobalt in IR heating.