Subjects of research: polynomial, interpolation and smoothing splines, cubic basic splines, methods and resources of signal processing and prediction of anomalies used in geophysics and railway systems.
Purpose of work: development of methods, algorithms and program complex for simulation of processes of processing and restoring of signals on a basis a spline - functions.
Methods of research: the theory of the functional analysis, generalized spectral methods, theory of numbers and matrixes, theory a spline of functions and simulation, theory of parallel computing processes and numerical methods of solution of simple equations.
The results obtained and their novelty: the methods and effective algorithms of calculation of signal restitution coefficients on the basis of onedimensional and many-dimensional splines arc offered; the algorithms and program complex for simulation of processes of signal processing by methods a spline - functions with application of digital data processors of signals arc developed; the spline - method of the analysis, estimation and prediction of operation stability of rails is offered.
Practical value: the software of the signals restoring with application of digital signal processors of the set Blackfin are developed; the parallel computing structure is offered on the basis of a cubic basic spline; the program complex for simulation of processes of restoring of signals by methods a spline - functions is developed.
Degree of embed and economic cffectivity: the main theoretical and practical results of dissertation work took root in the state joint-stock railway company «Uzbekistan temir yo'llari». The summarized economic benefit makes 26 mln. sum in a year.
Field of application: the methods, algorithms and software designed in dissertation work can be used in geophysics, ecology, seismology and radiolocation for signal processing, and also for problem solving of prediction of stability of rails in railway systems.
The common form of interference is random additive noise, which is statistically independent of the video signal. The additive noise model is used when the signal at the output of the imaging system or at some intermediate conversion stage can be considered as the sum of the useful signal and some random signal (noise). The additive noise model describes well the action of film grain, fluctuation noise in radio systems, quantization noise in analog-to-digital converters, etc. [10, p.23-24 ].
Jahonda energiya ta’minoti manbalari monitoringida axborotlarni taqsimlashning turli signal o‘zgartgichlarini keng qo‘llash, ular yordamida doimiy monitoring jarayonlarini amalga oshirishda elektr energiya istemol qiluvchi obektlarning uzluksiz va sifatli ishlashini ta’minlash bo‘yicha signallar bilan ta’minlovchi apparatlar, qurilmalar, vositalar hamda algoritm va dasturiy vositalarini takomillashtirishga qaratilgan qator ilmiy tadqiqot ishlari olib borilmoqda. Energiya ta’minoti tizimlarining ishonchli ish holatlarini ta’minlashda ishlab chiqarilayotgan energiya miqdori va sifatini manbalar quvvatini monitoring qilish asosida rejalashtirish, dasturiy vositalar va texnik yechimlarni ishlab chiqishga alohida e’tibor qaratilmoqda. Shu bilan birga elektr energiya manbalarining kattalik va parametrlarini ikkilamchi signallarga o‘zgartirish apparatlari tuzilish tamoyillari hamda ularning dasturiy vositalarini yaratish dolzarb masalalardan hisoblanmoqda.
When digital signal processing in a radio communication system, it is advisable to calculate the fractal dimension D and the Hausdorff dimension based on the topological mathematical expression D_0, analyze the methods of digital signal processing by the electro-optical method, i.e. perform experimental calculations of fractal points.
Ushbu maqolada oliy harbiy ta’lim muassasalarida elektron sxemalarni tahlil qilish, hamda ularni zamonaviy kompyuter usullari, hususan Electronics Workbench Multisim dasturi yordamida modellash imkoniyatlari yoritilgan.
Topicality and demand of the subject of dissertation. Development of science and intensification of all branches of national economy and also introduction of new technogenic processes of production have resulted in antropogenic influence of industrial activity of man on the environment and ecological equilibrium According to the data of regional evaluation of stable toxical compounds in the countries of the European Counsel the highest concentrations of Pb, Cd and Hg in the environment have been noted in the Ukraine (Pb-31,02; Cd-54, Hg-36 ton/year).Release of heavy metals to the environment for Russia equaled Pb-50%; Cd-66%; Hg-37% and in some others countries: Pb-10%,Cd-21%,Hg-58%,.Short analysis of the situation interms of these tree toxical metals has shown the level of antropogenic throwings of heavy toxical metals(HTM).The biggest part of HTM finding with throwings released to the atmosphere thrown out on soil and in waters of the country being the-surce the release and then they accumulate in neighbouring countries .
At presente time in the Republic of Uzbekistan the level of manufacture is rapidly growing and this results in the increase of the concervation of HTM compared with global scale of some natural processes. The most dangerous for the health of population are the non-essencial elements (Hg, Cd, Pb, As) . For this reason the monitoring of pollutions of objects of environment especialy HTM has acquired special importance and actuality. Qualitative and quantitative determination of ions of HTM has acquired important and necessary demands and has pulled out before analysts and ecologists the task of elaboration of express sensitive and selective methods of determination of microquantities of these elements which are dangerous toxicants, cancerogens and mutagens.
In this regard in the process protection of objects of the environment it is important and necessary to determinetion precise concentrations of HTM by different physical, chemical and physico-chemicals methods. For the practical realization of this problem at chemical analysis it is necessary to improve perfection existing methods analysis and elaborationof new modern methods ecotoxicants monitoring (espessially HTM). In the aspect of realization of theoretical prerequisites and practical confirmation of analytical determination of ecotoxicants concentrations it is necessary to elaborate some new hybrid methods with immobilization of different complexe-forming reagents on polymeric bearers and matrixes differing by high meteological and operation parameters.
Existing actual problems can be solved by introducing to the analytical practices of the methods of HTM determination of some new selective and specific organic reagents.The most perspective way of their solution is the purposeful synthesis and immobilization of new organic reagents with some definite analytical characteristics with following forecast of their properties with the aim of the optimal solving of the given tasks.
Elaboration of methods and approaches of prognosis as method of further development of sorbtion-spectroscopical method of analysis is an actual problem .In this range of theoretical and applied analytical chemistry there are considerable achivments bonding with investigations of home and forcing investigators ,but row of questions of problematical character has demanded of deep investigation and knowledges of new approaches and methods of their decision.
It is known that theory of action of OR is characterized as “system of ideas” allow ing to construct of some analytical system to find optimal by nature reagent and medium in which analytical reaction will carried out .In decision of some taskes of development of theory of OR action the fallowing stages neussarg to take into acconnl:”esplantion of observe processes and phenoments:prediction and direction works by synthesis of reagents with given properties .’’Thus the elaborated methodology and predication of properties of immobilized analytical reagents can be consider as definite seintific contribution in development of theory of action of IMOR for their using in analytical chemistry and ecology.
Purpose of research is elaboration of express, high-sensitive sorbtion-spectroscopical methods and test-systems of HTM determination with using of IMOR. Elaboration on the base of these methods some general approach to prognosis of properties and construction of specifical analytical grouos in organic reagents immobilized on different types of bearers synthesis of new organic reagents with given up properties on the base of our theretical prognosisesand introduction of them in practice of analysis of different analytical and ecological laboratories.
To achieve this goal the following tasks of research is solved: -optimization of immobilization conditions of organic reagents with preservation of their analytical properties; determination of mechanism of coloured reactious of complex-formation of immobilized organic reagents with ions of HTM;
-determination of connection between structure of OR and their analytical characteristics; prognosis of some perspective ways of their modification and directed synthesis of new specifical reagents on the base of nitronaphtols;
-analytical groups (EAG): (6-methyl-pyridil-2-azo-aminophenol; l-(5-methyl -2-pyridilfzo )-5-diethglaminophenol ;l-(4-antipyridilazo) -2-napthol sulphoacid; 1-(2-pyridilazo)-2-oxynaphtalin-6-sulphoacid sodlium; 3-hydroxy-4-nitrozo-2-naphtoic acid;2-hydroxiy -3-nitrozo naphtaldehyde and others);
-determination of influence of different factors and parameters on value of the analytical signal ;wing of elaborated methods in analysis of different by nature model binary ,triple and more complex mixtabiological objects industrial materials
-comparison of obtained results with results obtained by existing methods of determination of the investisated metals in solution.
Scientific novelty of disscrtational research consists in the following:
-Immobilization of different by nature reagents for prognosis and prediction of optimal construction of some OR based on quantum-chemical value of changing of analytical characteristics in dependence on structure of the functional and analytical-active groups has been theoretically based and practically has been realized;
-Chemico-analytical properties of OR immobilized on bearers on the base of polyacrylonitrile (PAN) and polypropylene (PP) for apriory prediction of structure of different OR and elaboration on their base an optical chemical sensors on the base PAN and PP-matrixes having some necessary analytical parameters;
Conclusion
1. Litrature date about using fiber sorbents and ion-exchanging on their base for determination of HTM cations at analysis objects of environment have been summarized. Advantages of using of fiber sorbents in comparison with their using as granule and powder have been shown. Necessarily of search of new immobilized reagents for determination metals in different objects was ground.
2. New scientific trend in analytical chemistry based on the sorbtion-spectroscopical determination of HTM in different objects of enviroment with using immobilized on fiber material organical reagents of different nature with aim of improvment of metrological parameters, exploitational and analytical parameters was developed.
3. Pysico-chemical and analytical properties of immobilized reagents on the base of reagents Arsenaza and threephenylmethan row and also synthesized on the department of organical chemistry NUUz sorbited on the fiber “Nitron” were systematically investigated. Optimal conditions of immobilization of new reagents on some polymeric bearers with preservation of theirspecifical analytical properties were determined.
4. 1R- spectroskopical investigation of immobilized reagents of fiber sorbents and their complexes with cations of HTM was carriedout. It was proved that in complex-formation of HTM ions with immobilized reagents the same functional analytical groups participated as in case of native solutions.
5. Results of investigations of interaction of reagents group Arsenazo and theephenylmethanic raw and also reagents synthesized on the derailment of inorganical and analytical chemistry of chemical faculty ofNUUz immobilized on marix on the base of PAN and PP-fibers with ions of HTM have shown that their immobilization was carried out owing to ionic changing and also formation of strong intermolecular hydrogenous bonds with bearers.
6. Using of calculating quant- chemical methods such as EMN, MNDO, RMZ and AM-1 has allowed in apriori to predict the structures of different rengents having some necessary analytical parameters (sensibility, contrastion of reactions and conditions of their carring out).
7. On the base on comparison optimal conditions of immobilization, sorbtion, degree of extraction of metals ions, coefficients of distribution, sorbtion capasity of fiber sorbents, data about sensibility of the analytical action occording to ions Cd, Hg, Cu and Fe in presence of accompanying elements, possibilities of quantitative desorption by small volumes of mineral acids and accessibility of initialcompounds it is shown an perspective of practical using of synthesized reagents and fiber sorbents. Immobilized reagents quantitativly have extracted ions of metals during 20-30 min at temperature 20-25°C in pH diapazone 3-7 (R=90-99%).
8. Coplex of methods of solidphase - spectroshopical and visually-testing determination of HTM in natural objects and samples of sewage and also new effective method of sorbtion - spectroskopical determination of Co,Cu, Cu, Ni, Fe and Hg in drinking and natural waters with using of immobilized organical reagent has been elaborated . This sorbtion - spectroskopical method has allowed to determine abovementioned metals in drinking and natural waters on the level n x 10-6 - n x 10'3 % and also to decrease the limitof their determination . Rightness of elaborated methods was proved by method “introduced - determined” at analysis of some real abjects and also by comparison with data obtained by atom -absorbtion method.
9. Elaborated methods were aprobated at analysis of real objects and were introduced in practics of laboratories by investigation of surface waters NYSMY; SES (sanepidemic station) of Tashkent region and Bekabad; department of radiopreparates of INP (Institute of nucleur physies) and others. Some obtained experimental data have been introduced in educational process at reading of lectures , carring out seminars and labaratory works with bachelors and masters by courses : “Analysis of environment objects”; “Optical methods of analysis “ ; “Physical methods of analysis “ ; “ Metrology statistics and computer in analytical chemistry” on the departments ofNUUz ; SamSU; Term.SV Tash.Pharm.1.
This article discusses the issues of methods and algorithms for processing audio signals, the purpose
and classification of filters, basic digital filters, low-order and high-pass filters of the first order, as
well as the purpose of processing, which can be purely technical tasks, such as matching signal
parameters with the characteristics of electro-acoustic tract.
The “gut-brain axis” is a bi-directional system of interaction between the central nervous system and the gastrointestinal tract (GIT), which consists of closely related neural and humoral pathways. There is now evidence, mainly from animal studies using gnotobiological models and by irritating the microbiota with antibacterial drugs, that gut bacteria are important in the gut-brain axis, acting here as modulators, and signaling pathway intermediaries.
For almost a century, many have considered lipids as the sine qua non of atherosclerosis. However, in 1856 Rudolf Virchow introduced a theory that inflammation is the driving force of atherogenesis. Recruitment of blood leukocytes to the injured vascular endothelium characterizes the initiation and progression of atherosclerosis and involves many inflammatory mediators, modulated by cells of both innate and adaptive immunity. The pro-inflammatory cytokine, interferon (IFN)-γ derived from T cells, is vital for both innate and adaptive immunity and is also expressed at high levels in atherosclerotic lesions. As such, IFN-γ plays a crucial role in the pathology of atherosclerosis through activation of signal transducer and activator of transcription STAT1.Our study indeed provides evidence that in HMECs STAT1 coordinates a platform for cross-talk between IFNγ and TLR4, and identifies a STAT1-dependent gene signature that reflects a pro-atherogenic state in coronary artery disease (CAD) and carotid atherosclerosis. Taken together, our data indicate that in the presence of appropriate stimuli, HMECs are highly responsive and consistently express Cxcl9. HMECs may therefore provide a better model for in vitro studies of atherosclerosis.
As an international arbitration practitioner, one of the initial inquiries we make when discussing the choice of arbitration seat with clients is whether the prospective jurisdiction has adopted the UNCITRAL Model Law. This question holds significant importance. We are only about 45 minutes into this conference, and we have heard extensive discussion of the Model Law already, and I think that is for a good reason. The Model Law really does reflect the state of the art in international arbitration practice as Christina Pak alluded to earlier. When a country adopts a version of the UNCITRAL Model Law as its own national arbitration law, it sends an immediate signal to investors and members of the business community that the law is a good and reliable law, i.e., the type of law that one needs to help to develop that jurisdiction as a strong seat of arbitration and facilitate the attraction of foreign investment and trade. In the instance of Uzbekistan, when practitioners in Uzbekistan and in the region and internationally ask whether the country has an arbitration law based on the UNCITRAL Model Law, of course, the answer to that question now is “yes”.
Computer vision as a scientific discipline refers to the theories and technologies for creating artificial systems that receive information from an image. Despite the fact that this discipline is quite young, its results have penetrated almost all areas of life. Computer vision is closely related to other practical fields like image processing, the input of which is two-dimensional images obtained from a camera or artificially created. This form of image transformation is aimed at noise suppression, filtering, color correction and image analysis, which allows you to directly obtain specific information from the processed image. This information may include searching for objects, keypoints, segments, and annexes;
Pain is an unpleasant sensory and emotional experience caused by existing or potential damage, described in terms of such damage. Pain is an important adaptive reaction of the body, serving as an alarm signal. However, if pain becomes chronic, it loses its physiological significance and is considered pathological. Acute pain appears when exposed to intense mechanical, thermal or chemical stimuli, lasts a short time and is clearly localized within the affected motor segment.