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In problems of a detection there are low -contrast objects on the images used algorithms usually, use the correlation and planimetric approaches. They are implemented by methods of a compounded filtration and differential methods [1,2]. In operation the new approach to a detection low -contrast of objects on the synthesized and radar-tracking images spreading covers grounded on fiactal exposition of a phon or terrain is offered [3]. In practice h c t a l dimensionality D measure indirectly -on a declination of dependence S=S (6 ), where S -measured value, for example, length of a line or area of a figure etc., 6 -step of measuring or size of a scanning window. It's shown, that for the first time designed algorithm of a detection of object using fractal indications, stabilly operates at low values a signal / phon (-30dB and below). The algorithm at the low requirements to inventory ensures high efficiency of measurings in a mode of actual time.In the report the problems of hardware embodying of digital radars surveyed on the basis of the non conventional concept of their build-up with a fractal information handling on a carrier frequency in at microwaves with an opportunity of deriving of unique basis of a composite sounding signal.Characteristics of a bifrequency numeral radar the following: -wave length -8, 6 and 20 mm; pulsing power -10-500 mW; basis of a signal >lo6; a range resolution <2 m; an operating range <5 and 4 0 0 km; power consumption <150 W.In the report algorithms of operation and methods of a substantiation of the basic parameters and estimation of efficiency of altemate variants of millimeter radars of a detection ground of objects also presented. The algorithm. of operation of radars of a detection of ground objects is submitted and the estimation of their efficiency is carried out [4]. In a result the following deductions are made.1. The obtained performances of radars (operating range, resolving ability on range and angular coordinates, and also on sector of the radar-tracking review) are in limits of the requirements. The level of technique of microwaves allows to create such systems already now.2. The estimation of efficiency of alternate variants of systems of a detection not enough of contrast of objects has shown, that efficiency of radars on frequency be higher 100 GHz up to 20 % above can, than on frequencies is lower 30 GHz.

We consider the problem to manage two stacks in two-level memory. It is assumed that the tops of the stacks grow towards one another in the fast memory to which several processors are allowed to have simultaneous access, and the size of the stacks exceeds that of the fast memory. The fast memory stores the tops of the stacks only, while the remaining parts are stored in the second level memory. If the top of one of the stacks becomes empty or the stacks fill all the fast memory, that is, the stack overflow occurs, then a swapping to the second level memory is performed in such a way that each time a certain state of the memory is set and the next step starts. We study how to choose such a state of the memory in order to maximise the average time before the next swapping to the second level memory.The research was supported by the Russian Foundation for Basic Research, grants 01-01-00113 and 03-01-06415.Large stack. We make the stack very large and assume that an overflow will never occur; an overflow causes abnormal termination.Demand fed single element stack manager. In this case the top of stack is hardware realised as a circular buffer and the rest of the stack is stored in the memory. As an overflow or underflow of the stack occurs, an element (or several elements) are moved from the buffer to the memory or vice versa.Paging stack manager. The top of stack is software realised as a part of dedicated memory. When the top of stack is emptied, the half of the buffer is copied from the memory, and when a stack overflow occurs, the lower half of the buffer is moved to the memory and the upper half is moved to the beginning of the buffer.

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