Молодые ученые – 2008 Материалы Международной научно-технической школы-конференции «Молодые ученые – науке, технологиям и профессиональному образованию»
The existing device repacking data streams and options for their implementation as application specific integrated circuits, so on the FPGA is studied. Revealed their limitations and shortcomings of the synchronization of the data flow transformation. A device universal repacking data streams is offered. The function chart and timing diagrams of his work is shown.
The flexible compound materials of test objects (type test patterns) to adjust the aviation optical equipment for the Earth remote sensing obtained by the method of ink-jet printing on the banner fabric have been studied. The quantitative regularities of changes in the optical and mechanical properties have been determined, which allow predicting the maintenance of the operational characteristics of the type test pattern.
The paper shows a possibility of printing polymeric strain gages, microstrip lines, coplanar waveguides and other elements of printed electronics for aviation equipment using modern printing technologies and equipment. The technology of screen printing and inkjet printing are complemented by three new operations for preparing the sealed films to apply a layer of electrically conductive ink. Additional operations allow to strengthen the adhesion of the layer of electroconductive paint to the film and thus to obtain strain gages for measuring large elongations.
Ioannicius and Sophronius Lichudes are believed to have taught courses of logic and physics in Moscow Slavo-Greek-Latin academy, but we know little about witnesses of this teaching, that is, manuscripts, which contain texts of these courses. Classification and assessment of these sources is presented in the article. We found reliable manuscript sources only for the course of logic, but sources on physics are unreliable. Manuscripts display how Lichudes worked on their courses. To achieve their goal, they used manuscripts on logic and physics written down by them while they were studying in Italy. Lichudes taught their Moscow students the philosophy of second scholasticism. They shortened their sources, and added almost nothing essential.
The construction of a microstrip lowpass filter presents metallic conductors in the form of parallel sections of zigzag-lines and symmetrically located between them dielectric zigzag insertion, made on a dielectric subscript of policor, and has a much more coefficient of dieing (S21 parameter) and the steepness of the front of the amplitude-frequency characteristic, in the difference of the construction of three parallel metallic zigzag-lines. The simultaneous use of periodic slow-wave structures of metal and dielectric in the microstrip devices also allows us to make a bandpass filter. Constructively such a filter is made on a dielectric subscript of policor, contains a metallic conductor in the form of a section of a zigzag-line and a periodic structure of dielectric insertions. Such a construction demonstrates a presence of the second, lower frequency of shearing, caused by the periodicity of the insertions-resonators, what allows us to get a filter with the band 2,0...2,7 GHz. The connecting of the opposite ends of the dielectric insertions with the metallic screen allows us to change the band width of the filter.
A model for organizing cargo transportation between two node stations connected by a railway line which contains a certain number of intermediate stations is considered. The movement of cargo is in one direction. Such a situation may occur, for example, if one of the node stations is located in a region which produce raw material for manufacturing industry located in another region, and there is another node station. The organization of freight traﬃc is performed by means of a number of technologies. These technologies determine the rules for taking on cargo at the initial node station, the rules of interaction between neighboring stations, as well as the rule of distribution of cargo to the ﬁnal node stations. The process of cargo transportation is followed by the set rule of control. For such a model, one must determine possible modes of cargo transportation and describe their properties. This model is described by a ﬁnite-dimensional system of diﬀerential equations with nonlocal linear restrictions. The class of the solution satisfying nonlocal linear restrictions is extremely narrow. It results in the need for the “correct” extension of solutions of a system of diﬀerential equations to a class of quasi-solutions having the distinctive feature of gaps in a countable number of points. It was possible numerically using the Runge–Kutta method of the fourth order to build these quasi-solutions and determine their rate of growth. Let us note that in the technical plan the main complexity consisted in obtaining quasi-solutions satisfying the nonlocal linear restrictions. Furthermore, we investigated the dependence of quasi-solutions and, in particular, sizes of gaps (jumps) of solutions on a number of parameters of the model characterizing a rule of control, technologies for transportation of cargo and intensity of giving of cargo on a node station.
Generalized error-locating codes are discussed. An algorithm for calculation of the upper bound of the probability of erroneous decoding for known code parameters and the input error probability is given. Based on this algorithm, an algorithm for selection of the code parameters for a specified design and input and output error probabilities is constructed. The lower bound of the probability of erroneous decoding is given. Examples of the dependence of the probability of erroneous decoding on the input error probability are given and the behavior of the obtained curves is explained.
Event logs collected by modern information and technical systems usually contain enough data for automated process models discovery. A variety of algorithms was developed for process models discovery, conformance checking, log to model alignment, comparison of process models, etc., nevertheless a quick analysis of ad-hoc selected parts of a journal still have not get a full-fledged implementation. This paper describes an ROLAP-based method of multidimensional event logs storage for process mining. The result of the analysis of the journal is visualized as directed graph representing the union of all possible event sequences, ranked by their occurrence probability. Our implementation allows the analyst to discover process models for sublogs defined by ad-hoc selection of criteria and value of occurrence probability
This volume presents new results in the study and optimization of information transmission models in telecommunication networks using different approaches, mainly based on theiries of queueing systems and queueing networks .
The paper provides a number of proposed draft operational guidelines for technology measurement and includes a number of tentative technology definitions to be used for statistical purposes, principles for identification and classification of potentially growing technology areas, suggestions on the survey strategies and indicators. These are the key components of an internationally harmonized framework for collecting and interpreting technology data that would need to be further developed through a broader consultation process. A summary of definitions of technology already available in OECD manuals and the stocktaking results are provided in the Annex section.