Том 3, № 11 (2015)
- Жылы: 2015
- ##issue.datePublished##: 20.04.2015
- Мақалалар: 10
- URL: https://ogarev-online.ru/2311-2468/issue/view/23721
Бүкіл шығарылым
Electromagnetic compatibility of GSM and LTE mobile radio communication systems
Аннотация
The issues of optimal use of a radio-frequency resource of mobile telecommunication system operators are considered. An analysis is carried out for the range of assigned frequencies of GSM system in case of connection of data transfer services of the fourth generation systems (LTE).
Ogarev-online. 2015;3(11):2-6
2-6
On designing of laboratory works for the course of "Fundamentals of circuitry of telecommunication devices"
Аннотация
The article deals with with the designing of a laboratory work "Generators of Harmonic Oscillations" for the course of "Fundamentals of Circuitry of Telecommunication Devices". The use of laboratory benches and comparison of the results of full-scale and model experiments are considered.
Ogarev-online. 2015;3(11):7-13
7-13
14-21
Identifying of malfunctions in mobile cellular systems
Аннотация
To identify malfunctions in mobile cellular systems, a model of expert system with fuzzy logic is considered. The authors demonstrate an implementation of the expert system module by identifying of insulation resistance malfunction of the cellular communication cable. The application of fuzzy logic for a knowledge base creation enables us to formalize the assessment of object technical condition and reasonably make decisions on malfunction identification.
Ogarev-online. 2015;3(11):22-26
22-26
Developing of switching power supply with MCU
Аннотация
This article considers the development of a universal highly reliable switching power supply with microprocessor control unit. The authors solved the problem of circuit design and created a control program for microcontroller. As a result, a fully functional prototype has been developed.
Ogarev-online. 2015;3(11):27-31
27-31
The influence of plate surface processing on the speed of silicon carbide thermal oxidation
Аннотация
The study focuses on the influence of the processing quality of 4H-SiC plate surfaces on the speed of thermal oxidation of silicon carbide in dry oxygen. The surfaces of plates with a bigger roughness demonstrate thicker oxide film under otherwise equal conditions.
Ogarev-online. 2015;3(11):32-37
32-37
Straight rectifier for ice-melting of transmission lines
Аннотация
The article considers the problem of damages done by glaze on overhead transmission lines and methods of clearing it. Particularly, the authors focus on the use of straight rectifier for direct current ice-melting of overhead transmission lines.
Ogarev-online. 2015;3(11):38-42
38-42
The features of monolayer photoresist double exposure for manufacturing of semiconductor devices and photomasks
Аннотация
The article presents an analysis of popular photolithographic methods of the formation of small-size elements on the substrate surface by using of double photoresist exposure obtained by imposing of photoresist layers and masks. The shortcomings of the methods are pointed out. In this connection, an improved scheme of photolithography technological process is suggested. It allows avoiding the shortcomings and obtaining small-size elements of less than 1 mcm.
Ogarev-online. 2015;3(11):43-50
43-50
Microprocessor terminal for hump yard of Russian Railways
Аннотация
This article considers the issues of the development of a hardware and software system to automate the performance monitoring of SG-76U blocks at hump yard. The system introduction enhances time efficiency of the staff operating the hump yard post in a large railway junction - Ruzaevka Station (Republic of Mordovia).
Ogarev-online. 2015;3(11):51-56
51-56
57-63