ON ANALYSIS AND SYNTHESIS OF ELEMENTARY AND COMPLEX INFORMATIONAL BISPECTRAL STRUCTURES

2008 ◽  
Vol 18 (09) ◽  
pp. 2753-2763 ◽  
Author(s):  
GERMAN N. BOCHKOV ◽  
KONSTANTIN V. GOROKHOV
Keyword(s):  
Spectral Line ◽  
High Frequency ◽  
Frequency Synthesizer ◽  
Realistic Model ◽  
Sectional Area ◽  
The Real ◽  
Analysis And Synthesis ◽  
Frequency Fluctuations

The problem regarding shapes of bispectral peak of the triplet representing the triharmonic signal is discussed. This triplet can be used as both standard diagnostic signal for a bispectral analyzers and a simplest element of complex informational patterns of bispectrally organized signals. The problem of analyzing and measuring the parameters of bispectral peak is equally fundamental as the well-known problem concerning the shape and width of spectral line of quasi-monochromatic oscillations. The sectional area of bispectral peak restricts the limiting informational volume of complex bispectral patterns. Two models of an actual triplet with frequency fluctuations are analyzed. Universal bispectral-peak shapes are found for a triplet with proportional frequencies for the limiting cases of extremely slow and extremely fast frequency fluctuations. The phenomenon of bispectral-peak superlocalization is discovered for quasi-static fluctuations and analyzed for the most realistic model of 1/f frequency fluctuations. The experiment investigating the bispectral peak of the real high-frequency synthesizer is presented.

scholarly journals COMPARISON OF AS, HG AND TL HIGH-FREQUENCY ELECTRODELESS LAMPS FOR DETECTION OF ENVIRONMENTAL POLLUTION

2021 ◽  
Vol 1 ◽  
pp. 275-280
Author(s):  
Natalja Zorina ◽  
Atis Skudra ◽  
Gita Revalde ◽  
Zanda Gavare
Keyword(s):  
Spectral Line ◽  
Environmental Pollution ◽  
High Frequency ◽  
Spectral Lines ◽  
Line Center ◽  
Light Sources ◽  
Instrumental Function ◽  
Plasma Parameters ◽  
The Real ◽  
Experimental Profile

Nowadays, there is an increasing necessity to determine the concentration of different substances in the environment in low concentrations, as more and more attention is paid to environmental pollution. This work is devoted to the comparison of main characteristics of high-frequency electrodeless light sources with different fillings for their use in high precision atomic absorption analysers.The spectral line intensities and profiles were studied in special design light sources, manufactured at Institute of Atomic Physics and Spectroscopy, with arsenic, mercury and thallium filling. Special attention is devoted to the UV lines of 193.7 nm and 197.2 nm of As, 276.8 nm, 377.6 nm of Tl and 253.7 nm of Hg spectral lines. The intensities and profiles were measured by means of a Fourier transform spectrometer.The deconvolution procedure was implemented to obtain the real form of emitted profiles for further analysis, since in the case of low –pressure or cold plasma, the instrumental function is on the same order that experimental profile and it has to be taken into account. The instrumental function can distort the real spectral line shape significantly, for example, it changes the width of the spectral line that leads to the uncertainties in the determination of such important plasma parameters like temperature. The instrumental function can conceal a detailed structure of the spectral line, like the dip in the line center caused by the self-absorption (self-reversal) and characterizing the radiation trapping.The integrated areas, values of self-absorption, and other parameters were obtained and compared for all fillings as a function of working regimes. 

The digital function filters – algorithms and applications

2013 ◽  
Vol 61 (2) ◽  
pp. 371-377
Author(s):  
M. Siwczyński ◽  
A. Drwal ◽  
S. Żaba
Keyword(s):  
Digital Filters ◽  
Phase Shifters ◽  
Square Root ◽  
Real Power ◽  
The Real ◽  
Distributed Parameters ◽  
Digital Modeling ◽  
Analysis And Synthesis ◽  
Basic Functions ◽  
Recursive Formulas

Abstract The simple digital filters are not sufficient for digital modeling of systems with distributed parameters. It is necessary to apply more complex digital filters. In this work, a set of filters, called the digital function filters, is proposed. It consists of digital filters, which are obtained from causal and stable filters through some function transformation. In this paper, for several basic functions: exponential, logarithm, square root and the real power of input filter, the recursive algorithms of the digital function filters have been determined The digital function filters of exponential type can be obtained from direct recursive formulas. Whereas, the other function filters, such as the logarithm, the square root and the real power, require using the implicit recursive formulas. Some applications of the digital function filters for the analysis and synthesis of systems with lumped and distributed parameters (a long line, phase shifters, infinite ladder circuits) are given as well.

scholarly journals Challenges of NATO aspıratıon: the dıscrepancy between rhetorıc and realıty

2020 ◽  
Vol 10 (2) ◽  
pp. 16-26
Author(s):  
Khayal Iskandarov ◽  
Piotr Gawliczek
Keyword(s):  
Comparative Analysis ◽  
Research Methods ◽  
The Real ◽  
Analysis And Synthesis ◽  
The Face ◽  
Near Abroad

The Russo-Georgia war in 2008 and the conflict in Ukraine in 2014 galvanized the countries, which are namely squeezed between NATO and Russia into considering their strategies again. The paper examines Russia’s efforts to maintain its influence in its “near abroad” in the face of NATO’s enlargement. It principally focuses on identifying the challenges particular countries face as obstacles to NATO accession. The arguments raised in the paper prove that, the primary reasons of Russia-Georgia War and Ukraine conflict are associated with these countries’ NATO aspiration. An argument regarding the Alliance’s reluctance to actively engage in partner nations is also presented. The objective of the study is to consider the repercussions of NATO aspiration and introduce the real prospects of cooperation with NATO. The research methods primarily used in the book are comparative analysis and synthesis.

Design of DDS Based on FPGA Technology

2015 ◽  
Vol 713-715 ◽  
pp. 1031-1033
Author(s):  
Wei Jiang ◽  
Fang Yuan ◽  
Liu Qing Yang
Keyword(s):  
High Frequency ◽  
Simple Structure ◽  
Frequency Synthesizer ◽  
Sine Wave ◽  
Lookup Table ◽  
Frequency Resolution ◽  
Signal Frequency ◽  
Small Delay ◽  
Working Principle ◽  
Output Only

This paper introduces the working principle and structure of direct digital frequency synthesizer. This paper select the technology of lookup table to design DDS because it has many advantages such as less consumption hardware resources, simple structure, output only small delay and so on. As a result, signal generator can produce many waveforms with good stability and high frequency resolution. Finally, test showed that the output wave of triangular signal frequency is greater than 1MHz and the highest sine wave frequency is 30MHz, the value of peak to peak is continuously adjustable in 50mV ~ 4V range. The result of study will provide theoretical guidance for the design of DDS.

High-frequency fluctuations in the IGS'92 polar series

1995 ◽  
Vol 19 (3) ◽  
pp. 391-398
Author(s):  
Cheng-li Huang ◽  
Wen-jing Jin ◽  
De-chun Liao ◽  
Wen-yao Zhu ◽  
Jie-xian Wang
Keyword(s):  
High Frequency ◽  
Frequency Fluctuations

“Spring Palace Paintings” in Chinese Traditional Painting

2021 ◽  
Vol 13 (1-2) ◽  
pp. 414-424
Author(s):  
Anna Zavyalova ◽  
◽  
Keyword(s):  
Chinese Art ◽  
The Real ◽  
Traditional Art ◽  
First Impression ◽  
Analysis And Synthesis ◽  
Formation And Evolution ◽  
Artistic Images ◽  
Historical Methods ◽  
The Erotic

The article considers the erotic genre of traditional Chinese art, chun gong hua (‘spring palace paintings’), which was developed in painting. The study uses comparative - historical, cultural and historical methods, as well as methods of systematization, analysis and synthesis. The author traces the formation and evolution of the genre, reveals its specific features. The paper analyzes the system of artistic images of the works of chun gong hua, reveals that they are based on the ideas of Taoism, which are visualized through painting, which made it possible to reveal a second, meaningful plan of paintings filled with metaphors and allegories. Particular attention is paid to the characterization of expressive means, specific techniques and visual techniques of the genre. The study shows that due to the richness of images, artistic and expressive means and techniques, juxtaposition of the conditional and the real, double transformation of nature, the first impression of seemingly pornographic images of naked bodies and erotic scenes is subdued. The high artistry of the ‘spring palace paintings’ allows us to attribute them to the unique works of Chinese traditional art.

The asymptotic analysis of canonical problems in high-frequency scattering theory

1973 ◽  
Vol 74 (2) ◽  
pp. 289-312
Author(s):  
W. G. C. Boyd
Keyword(s):  
Real Axis ◽  
High Frequency ◽  
Separation Of Variables ◽  
Integral Representations ◽  
Stratified Medium ◽  
Plane Boundary ◽  
The Real ◽  
The Past ◽  
Parameter Separation ◽  
Wave Problems

AbstractThe asymptotic treatment of high-frequency scalar wave problems has in the past been rather unsatisfactory. Typically, the integral representations which arose were evaluated by stationary phase, or as a series of residues. The justification of these methods was usually heuristic and formal. In this paper, a method is advanced which, it is claimed, may be applied to any one-parameter separation of variables problem. The method assumes an integral representation whose contour of integration is the real axis. It is then only necessary to deform this contour in the neighbour-hood of the real axis to derive rigorous asymptotic expansions of the field in both the illumination and shadow. The method is applied to the particular example of scattering by a plane boundary in a general stratified medium with monotonically increasing refractive index.

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