Synthesis of an algorithm for grouping air objects in radar systems

2021 ◽  
Author(s):  
N.R. Khalimov ◽  
S.L. Ivanov ◽  
A.V. Fedorov
Keyword(s):  
Computing System ◽  
Practical Significance ◽  
Optimal Decision ◽  
Production Rules ◽  
Pearson Criterion ◽  
Radar Systems ◽  
Urgent Task ◽  
Optimal Decision Rule ◽  
Processing Information ◽  
Low Efficiency

Any radar complex exercising control over the airspace has a limited capacity. When processing information about a large number of air objects, overloads occur in information systems and part of the information is inevitably lost. To solve this problem, you need to group the goals. If you refuse to group, then this can lead to oversaturation of the displayed situation on the monitor and the human operator, according to his physical capabilities, will not be able to cope with its assessment. That is, the more goals, the worse the quality of the tasks being solved. One of the ways to solve this problem is to reduce the number of tracked objects by grouping them. Therefore, grouping is a necessary measure taken to simplify the presentation and assessment of the situation. The currently used algorithms for grouping air objects are based on spatial gating, which have low efficiency in a difficult environment. Therefore, the development of new strobe-free methods of grouping air objects is an urgent task. Objective – to develop and research a new strobe-free algorithm for grouping air objects in radar complexes for detecting and tracking air targets. In work a new algorithm for grouping air objects is synthesized, which is based on one of the methods of cluster analysis and an optimal decision rule according to the Neumann-Pearson criterion about the belonging of the considered set of air objects to one group. Some results of simulation modeling of the synthesized algorithm in a complex air environment in comparison with the algorithm based on production rules are presented. Practical significance – the developed algorithm for grouping air objects is more efficient than both the grouping algorithm in the spatial strobe and the algorithm based on production rules. This is especially noticeable in cases of flight of several groups to air objects on intersecting trajectories. The developed algorithm does not impose great requirements on the computing system of the radar complex and can be implemented in practice without restrictions.

scholarly journals Optimal control of queueing networks: an approach via fluid models

2002 ◽  
Vol 34 (02) ◽  
pp. 313-328
Author(s):  
Nicole Bäuerle
Keyword(s):  
Optimal Control ◽  
Decision Rule ◽  
Average Cost ◽  
Queueing Networks ◽  
Optimal Decision ◽  
Stochastic Network ◽  
Asymptotically Optimal ◽  
Multiclass Queueing Networks ◽  
Optimal Decision Rule ◽  
Multiclass Queueing

We consider a general control problem for networks with linear dynamics which includes the special cases of scheduling in multiclass queueing networks and routeing problems. The fluid approximation of the network is used to derive new results about the optimal control for the stochastic network. The main emphasis lies on the average-cost criterion; however, the β-discounted as well as the finite-cost problems are also investigated. One of our main results states that the fluid problem provides a lower bound to the stochastic network problem. For scheduling problems in multiclass queueing networks we show the existence of an average-cost optimal decision rule, if the usual traffic conditions are satisfied. Moreover, we give under the same conditions a simple stabilizing scheduling policy. Another important issue that we address is the construction of simple asymptotically optimal decision rules. Asymptotic optimality is here seen with respect to fluid scaling. We show that every minimizer of the optimality equation is asymptotically optimal and, what is more important for practical purposes, we outline a general way to identify fluid optimal feedback rules as asymptotically optimal. Last, but not least, for routeing problems an asymptotically optimal decision rule is given explicitly, namely a so-called least-loaded-routeing rule.

The Research on Real-Time Simulation of Wavers Based Parallel DSP System

2013 ◽  
Vol 373-375 ◽  
pp. 2175-2179
Author(s):  
Ying Li ◽  
Jing Qiu
Keyword(s):  
Real Time ◽  
Simulation Method ◽  
Ocean Wave ◽  
Practical Significance ◽  
Real Time Simulation ◽  
Wave Simulation ◽  
Time Simulation ◽  
Dsp System ◽  
Low Efficiency ◽  
The Waves

3D ocean wave simulation has long been hot issues in the field of computer graphics and real-time simulation and has practical significance in many areas of society. Complexity and randomness of the waves led to large areas of ocean wave simulation calculation exists for compute-intensive, low efficiency, memory requirements and other limitations. In response to the phenomenon of a decline in real-time with the fidelity lifting, this paper proposes a parallel simulation method, in which the wave data is calculated by each DSP and the results will be stitched as large ocean area. Experimental results show that the multi-DSP parallel processing method can satisfy the feeling of reality and real-time requirements of the waves at the same time, which will improve the system real-time performance without loss the wave details.

The optimal decision rule in the Kiefer-Weiss problem for a Brownian motion

2013 ◽  
Vol 68 (2) ◽  
pp. 389-391
Author(s):  
Mikhail V Zhitlukhin ◽  
Alexey A Muravlev ◽  
Albert N Shiryaev
Keyword(s):  
Brownian Motion ◽  
Decision Rule ◽  
Optimal Decision ◽  
Optimal Decision Rule

scholarly journals Typical Texture Formulas in Contemporary Music for Button Accordion of Ukrainian Composers: Review and Systematization

2021 ◽  
pp. 65-71
Author(s):  
A. Stashevskyi
Keyword(s):  
System Analysis ◽  
Contemporary Music ◽  
Practical Significance ◽  
Musical Language ◽  
Modern Music ◽  
Urgent Task ◽  
Musical Works ◽  
Work Samples ◽  
First Time ◽  
Instrumental Texture

The relevance of the topic and problem statement. In the process of formation and development of the original style of button accordion music one of the most important roles is played by the factor of texture, which fully embodies the instrumental specificity of the button accordion, and reflects the originality of forms and varieties of musical fabric in button accordion works. The study of the peculiarities of texture organization, as well as highlighting the main trends in texture formation in modern button accordion music, in particular in the works of Ukrainian composers, is seen as an urgent task to understand the essence of the phenomenon of modern button accordion, and in general — to develop domestic musicology in instrumental art. In previous works of the author of this article, an attempt was made to systematize the textured formations of modern button accordion music, which are determined by the specifics of the design of button accordion keyboards (Stashevskyі, 2021). Continuing further study of the textured organization of modern music for button accordion, there is a need to identify and systematize other typical for this work samples of texture and its components, the structure of which is not due to the structural configuration of sound keys on button accordion keyboards. That is, those that are more universal, but, at the same time, are characterized as typical of modern button accordion art. The purpose of the study is to study the most typical textural elements and combinations of modern button accordion music, as well as their systematization based on the analysis of their internal structural organization. The methodology used in this article is based on the use of methods of theoretical musicology (primarily, analysis of elements of musical language and means of expression), as well as methods of structural and system analysis, generalization and classification. The results. The systematization of typical original texture formulas of modern button accordion creativity carried out in this work provides their division into certain groups and kinds (subgroups) in the middle of these groups, in particular: reverberation (chordal and mixed); stereophony (pulsation, transmission, unison); pedalling arpeggio (rhythmic, non­rhythmic); pedal scale (cluster crescendo); monophonic structural­modular constructions (chromatic by broken intervals; gamma­shaped­arpeggio based on a 5­element fingering group); chord transpositions (interval­algorithmic (chromatics; m3; m2­B2; etc.), thematic­melodic); simplified accompaniment (alternation of tessitura­polar sounds); multi­octave duplications (unison, decomposed­arpeggio). The topicality of the work lies in the fact that for the first time in modern musicology the textured elements of modern button accordion music have received analytical discourse and systematization. The practical significance of the work lies in the possibility of its use in theoretical courses on the study of button accordion art, as well as in the practical work of button accordionists. Conclusions. To sum up, we can state that the considered original textural elements and formulas are typical for modern button accordion music, as they occur in works in many cases. The typical button accordion texture formulas considered in this article, which are often found in the artistic plane of musical works, play an important role in the formation of a kind of stylistic handwriting of modern button accordion speech. At the same time, they, in contrast to the group of determinant texture formulas, reflect a certain universalism of their presentation, as they can be transferred to other instrumental texture (keyboard instruments) conditions and implemented in them.

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