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Specific emitter identification based on graphical representation of the distribution of radar signal parameters

Dudczyk J., Kawalec A.

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2015

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Vol. 63, nr 2

391--396

EN

The article presents some possibilities of same type radar copies identification with the use of graphical representation. The procedure described by the authors is based on transformation and analysis of basic parameters distribution which are measured by the radar signal especially Pulse Repetition Interval. A radar intercept receiver passively collects incoming pulse samples from a number of unknown emitters. Information such as Pulse Repetition Interval, Angle of Arrival, Pulse Width, Radio Frequency and Doppler shifts are not usable. The most important objectives are to determine the number of emitters present and classify incoming pulses according to emitters. To classify radar emitters and precisely identification the copy of the same type of an emitter source in surrounding environment, we need to explore the detailed structure i.e. intra-pulse information, unintentional radiated electromagnetic emission and fractal features of a radar signal. An emitter has its own signal structure. This part of radar signal analysis is called Specific Emitter Identification. Utilization of some specific properties of electronic devices can cause heightening probability of a correct identification.

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Rola systemów wczesnego ostrzegania w zarządzaniu organizacjami

Kuc B. R.

Zeszyty Naukowe AON

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2009

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nr 2(75)

311-323

EN

To avoid error, bankruptcy, not to be taken over by competitors - these are the most common challenges facing the management (boards) of contemporary organizations. In order to support these tasks, early warning systems (EWS) are created. In industries and banks they are one of components to assess the firm's financial condition. They enable early reconnaissance of the threat and activating appropriate repair processes. Historically, EWS emerged as a response to numerous bankruptcies of companies during the Great Depression (1929 - 1933), when managers not having appropriately early information of threat, were not able to forecast the threat. Currently, the image of a company bankruptcy is frequently perceived as a threat and induces taking effective actions delaying the inevitable bankruptcy. Therefore, effective risk management and risk measuring using early warning systems may effectively forecast future events threatening the company existence. Thus, the early warning system’s task is to disclose the deteriorating economic and financial situation of the company through providing economic data, for example indices enabling undertaking further decisions relating to improving the company’s condition. The article contains EWS components, forms and kinds of applied instruments to detect threats, role of inspections and strategic controlling in slowing down, if it is inescapable, bankruptcy.

3

Nowe elektryczne wciągniki łańcuchowe konstrukcji CMG KOMAG

Bałaga D., Budzyński Z., Kalita M., Prostański D.

Maszyny Górnicze

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2007

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R. 25, nr 4

36-43

PL

W artykule przedstawiono rozwiązania konstrukcyjne elektrycznych wciągników łańcuchowych, w zakresie małej mechanizacji. Elektryczne wciągniki mają na celu usprawnienie prac wykonywanych między innymi w komorach montażowych podziemnych wyrobisk górniczych. Przedstawione w artykule nowe wciągniki łańcuchowe charakteryzują się zwartą budową i niewielkimi wymiarami gabarytowymi w stosunku do możliwości przemieszczanych mas ładunków. Opisano główne parametry techniczne, zakres zastosowania oraz wymagania bezpieczeństwa jakie muszą spełniać prezentowane urządzenia.

EN

Design solutions as regards electric chain hoists, concerning small mechanization, were presented in the paper. The aim of electric hoists is to facilitate operations, which are carried out, among others, in assembly chambers of underground workings. New chain hoists, which were presented in the paper, are the hoists of compact design and small dimensions in relation to weights that are moved. Main technical parameters, range of use and safety requirements, which have to be met by presented equipment, were described.