Vojnotehnicki glasnik / Military Technical Courier

5-14

Authors: Ugarak Dragoslav

This paper presents mathematical model of determining target range by analyzing video frame during the tracking. The contribution of effective parameters to accuracy are analyzed and values of standard deviation are determined.

22-34

Authors: Bondžulić Boban, Barbarić Žarko

In this paper the approach for movement detection is described. The approach is based on background subtraction and temporal differencing. To overcome problems with these two techniques, a hybrid algorithm for change detection is described. A hybrid algorithm is a combination background subtraction technique with a frame differencing technique. In this paper the method for background extraction is described, too.

49-58

Authors: Unković Milovan

The Doppler maritime navigational logs are based on measurement of the Doppler effect. A Doppler log transmitting transducer emits beam of sound vibration in the water, and a second (or the same) transducer receives the echo from the sea bed or -water layer. In this article describes theory of Doppler effect, using this theory in maritime logs, construction and performance of modern Doppler logs.

74-80

Authors: Vukobrat Željko

A theoretical model for determining the voltage output signals of the position-sensitive receiver is developed and verified experimentally. A quadrant detector is used for converting light energy into electrical energy. The quadrant detector has four independent and equal photodiodes on the sensing surface. A correctly focused symmetrical laser or optical beam will form a circular spot on the detector's active surface after passing through the lens. The photodiodes are connected to a voltage source via resistors. A photoelectric current generated in the photodiode causes a voltage drop across the associated resistor and thus provides an output signal. The signal detected by each photodiode of the quadrant detector is proportional to the area of the light spot image on the photodiode. The derived theoretical model enables a quick and correct analysis of experimental results, that is the base of the checking of technical requirements of preliminary project design of the position-sensitive optical receiver for defined purpose. The experimental results show the excellent agreement -with theory.

88-96

Authors: Prodanović Goran

Knowledge of mathematical transformation models that can present value of vector of geomagnetic field is very important. Defining coefficients of transformation functions provides presentation of disposition value of geomagnetic field on defined space. This article presents geomagnetic field, Gauss' method of analysis of geomagnetic field and using least square method to solve system of equations of normal values geomagnetic field.

102-112

Authors: Stamenković Predrag

Motorcycles used in traffic direct and control units in the Military of Serbia and Montenegro should have such technical and operational characteristics that -will completely meet strict demands for directing and controlling military traffic and that -will improve the quality of traffic support in modern combat conditions. It is important to discuss characteristics of a motorcycle and demands it has to meet -when choosing "optimal" motorcycle model. This paper shows model of motorcycle choice using Promethee method of multiple ranging criteria.