- TITLE:
POWER CONTROL SCHEMES FOR DEVICE-TO-DEVICE COMMUNICATIONS IN 5G MOBILE NETWORKS
- AUTHOR(S):
G. Mihailov, T. Iliev, E. Ivanova
- ABSTRACT:
Device-to-device (D2D) communications integrated into cellular networks is a means to take advantage of the proximity of devices and thereby to increase the user bitrates and system capacity. D2D communications has recently been proposed for the 3GPP Lon g Term Evolution (LTE) system as a method to increase the spectrum- and energy-efficiency. Device-to-device (D2D) communication has the potential of increasing the system capacity, energy efficiency and achievable peak rates while reducing the end-to-end latency. To realize these gains, are proposed resource allocation (RA) and power control (PC) approaches that show near optimal performance in terms of spectral or energy efficiency.
- TITLE:
RADIATION PATTERN MEASUREMENT WITH MATLAB IMPLEMENTATION
- AUTHOR(S):
H. Zhivomirov, I. Iliev
- ABSTRACT:
In the present paper a Matlab®-based program is developed for measuring the radiation pattern (polar response) of the loudspeaker using data acquisition system NI USB-6211, Matlab® Data Acquisition Toolbox and Matlab® Signal Processing Toolbox. A definition of the loudspeaker radiation pattern is presented along with block diagrams of the measurement setup and the program algorithm. A comparison between the theoretical and the experimental results has been made. Conclusions are drawn from the analysis of the study. The proposed Matlab® program can be downloaded for free, from the link given at the end of the paper.
- TITLE:
AUTOMOTIVE BODYWORK COATING OBESITY MEASUREMENT DEVICE
- AUTHOR(S):
N. Draganov
- ABSTRACT:
Measurement of the thickness of the applied lacquer coating on the ferrite material is an important task for the various processes. These devices are very necessary even in cases that require determining the quality of the paint when buying a car. The article is a description lacquer coating of brands and models of cars. The results of the design, implementation and testing of a device for measuring the thickness of the paint application in the car.
- TITLE:
EXPERIMENTAL CAPTURE OF TRANSFER CHARACTERISTICS OF GALVANOMAGNETIC HALL SENSORS TYPE MLX91206 CAL-001
- AUTHOR(S):
D. Georgiev
- ABSTRACT:
This article aims to present experimental conversion characteristics of galvanomagnetic integral circuit type MLX91206 CAL-001. It’s proposed experimental setup for testing, it’s obtained conversion characteristic U0 = f(B), temperature conversion characteristic U0t = f(T°C) and it’s make a study on the thermometer module.
- TITLE:
MICROSCOPE ANALYSIS OF LASER TREATED COTTON FABRICS
- AUTHOR(S):
B. C. Stoianov, K. I. Drumev, D. N. Genov
- ABSTRACT:
In this paper, the effects of laser bleaching treatment due to 1064nm Pulsed Ytterbium Laser on samples of fabric “Denim” was studied. The degree of surface modification is changed depending on the applied power laser radiation. The radiation is changed in an optimal range while all another parameters of laser treatment are maintained constant. Before the cotton fabrics were irradiated with laser directly, they were undergone three wet processes including desizing, scouring and washing. After the laser processing, the samples were undergone wash finishing – “enzyme wash”. Changes in surface coloring were evaluated, provided microscope analysis.
