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Koncepcja Internetu opartego na komutacji strumieni danych dla Systemu IIP
No full textabstractPL: W artykule przedstawiono koncepcje Równoległego Internetu, jednej z sieci przeznaczonej do pracy w Systemie IIP. System IIP jest obecnie projektowany przez uczestników polskiego projektu dotyczącego architektury Internetu Przyszłości. Podstawowym założeniem projektu jest wykorzystanie płaszczyzn sterowania oraz płaszczyzn danych w Internecie Przyszłości dla realizacji różnych usług przez różnych operatorów wirtualnych. Różne płaszczyzny danych będą pracowały równolegle i będą korzystały z innychprotokołów komunikacyjnych. Stąd, w Systemie IIP nazywane są one Równoległymi Internetami (RI). W artykule przedstawiono koncepcje jednego z takich Równoległych Internetów, który ma służyć do realizacji usług z jakością obsługi zbliżoną do tej znanej z klasycznej komutacji kanałów. Nazywany jest on Równoległym Internetem z Komutacja Strumieni Danych (RI-KSD). Jest to pierwsza, wstępna prezentacja koncepcji RI-KSD, która wskazuje umieszczenie RI-KSD w Systemie IIP, usługi realizowane w tej sieci, budowę węzłów oraz zasady sterowania i zarządzania konfiguracja.score: 4collation: 972-98
Optically-Switched Microwave Filter with the use of Photovaractors in Self-Bias Mode
No full textscore: 3collation: 161-16
Development of micro- and nanophotonics - impact on information technology
No full textabstractEN: The dynamic development of micro and nanophotonics in the last decades provides novel concept for light engineering. Especially the confinement of light in a “photonic cage” can be viewed as a crucial step towards the design of optical devices at the wavelength scale with ultimate properties for storing, filtering, guiding and emitting light. It is also part of tendency towards the extreme miniaturization of devices and systems, which is made necessary by the manipulation of an ever increasing number of data. In this paper we will discus some aspects of research integrated photonics featuring innovative science and engineering results on active devices, waveguide devices, and. functional photonic components, especially useful for transparent optical network, data communications and data processing. We will also discus some aspects of the generation, detection and transport of optical fields and their interaction with matter on the “nanoscale”.score: 0collation: 284-28
Zastosowanie sieci neuronowych do realizacji funkcji kryptograficznych
No full textscore: 3collation: 81-8
Efficient Variable Partitioning Method for Functional Decomposition
No full textabstractEN: In recent years the functional decomposition has found an application in many fields of modern engineering and science, such as combinational and sequential logic synthesis for VLSI systems, pattern analysis, knowledge discovery, machine learning, decision systems, data bases, data mining etc. However, its practical usefulness for very complex systems has been limited by the lack of an efficient method for selecting the appropriate input variable partitioning. This is an NP-hard problem and thus heuristic methods have to be used to efficiently and effectively search for optimal or near-optimal solutions. In this paper, a heuristic method for the input variable partitioning is discussed. The method is based on an application of evolutionary algorithms, what allows exploring the possible solution space of problem while keeping the high-quality solutions in this reduced space. The experimental results show that the proposed heuristic method is able to construct an optimal or near optimal solution very efficiently even for large systems. It is much faster than the systematic method while delivering results of comparable quality.score: 8collation: 63-8
Synthesis of memory addressing circuits in FPGA based sequential machines
No full textscore: 4collation: 31-3
Wpływ tłumienia zaleznego od polaryzacji na dyspersję polaryzacyjną w światłowodzie jednomodowym
No full textabstractPL: W niniejszym artykule autor prezentuje model kaskadowy światłowodu jako układu składającego się z kilkudziesięciu segmentów. Model ten jest odpowiedni do rozpatrzenia problemu oddziaływania zjawiska PDL na PMD. Autor na bazie owego modelu przedstawia wyniki symulacji numerycznych. Autor przedstawia proces zmian rozkładu gęstości prawdopodobieństwa różnicowego opóźnienia grupowego w zależności od PDL. Drugim aspektem rozważanym w niniejszym artykule jest zaburzenie ortogonalnosci modów polaryzacyjnych pod wpływem PDL. Na podstawie symulacji numerycznych zostaje przedstawiony stopień degradacji systemu transmisyjnego z PMD pod wpływem niezerowego PDL.abstractEN: The topic of the article is interdependence of PMD (Polarization Mode Dispersion) and PDL (Polarization Dependent Loss). First of all, the proper mathematical feedback is presented. Description of PMD and PDL by the 2 x 2 Jones complex transmission matrix is provided. Ways of calculating PDL and DGD (Differential Group Delay) out of a matrix are also presented (Jones matrix eigenanalysis JME). After that, the cascade fibre model (model of a fibre that consist of many e.g. 200 pieces) is introduced that reflects all the real system subtleties such as: varying birefringence through changes of temperature and stress, mode coupling and varying of PDL. Then, a set of numerical simulation results (based on the above mentioned model) is presented; these are: DGD probability density functions for different PDL and a plot illustrating the out-of- work time during one-year period as a function of PDL (with fixed PMD). On probability density functions plots the process of evolving distribution function from Maxwellian distribution to a new one due to PDL is shown. The new probability distribution function results in greater probabilities of high DGD values when some amount of PDL is present in the system. On other plots it is shown that linearly increasing PDL of a system produces exponential growth in the amount of out-of-work time during one-year period. The other problem mentioned in the article is the loss of orthogonality of PSP due to the PDL. As an orthogonality measure, a [gamma] coefficient is provided which is a correlation of two PSPs. Then the probability density function of a [gamma] coefficient of a system with PDL is shown. The presented characteristics fits well within the Weibull distribution. At the end the impact of non-orthogonality of PSP on increasing distortions due to PDL on the system with PMD are shown. The distortion manifests with grater probabilities of high DGD than in the case of considering PDL to PMD influence without taking into account the loss of orthogonality of two PSPs. The article outlines the problems which may occur in fibre networks due to the interaction of PMD and PDL and that may not be neglected when introducing high-speed optical networks. It is shown that the measure of average DGD is not sufficient parameter of describing the PMD problem when PDL is taken into consideration.score: 0collation: 305-31