Images get blurred when they are acquired and contaminated by noise while being transmitted,hence it is necessary to restore the image and remove the noise present in the image.The deconvoluion is performed for removing blur from the image in many application such as astronomy, remote sensing and medical imaging etc.In this paper we have used wavelet transform to deblur the image and Daubechies wavelet is used for this purpose.We have compared the performance of wavelet based deconvolution with the Weiner deconvolution method. The simulation has been performed by contaminating the image using different types of blur and signal to noise ratio in both cases have been calculated .
Keywords: Daubechies wavelet, signal to noise ratio, wavelet transform, wavelet based deconvolution, Weiner
deconvolution
In this paper the bimatrix game with symmetric trapezoidal pay -off is considered.At first trapezoidal number ranking method for such games is defined and then we define Nash equilibrium solution for pure strategies and mixed strategies.The inequality constraints involving trapezoidal co-efficients are reduced in their satisfactory crisp equivalent form and a satisfactory solution of the problem is established.Numerical example is given to illustrate the methodology.
Keywords - Bi-Matrix game,Symmetric trapezoidal number,Nash equilibrium.
The energy absorbing capacity of the reinforcement bars in concrete only occurs after the yield point. If the yield point of steel is too high, stresses in the concrete reach failure level before the yield point of the steel, allowing the formation of large shear and bond stresses at time of yield and ultimate brittle collapse. High yield is equally associated with reduced yield platform and energy absorption. Steel reinforcement bars in Uganda, mainly cold twisted, are often of high yield even though they amply meet the standard ductility requirements. This has largely been attributed to their recycled origin. This research investigates the relationship between the elevated yield values and the residual element content which in turn is a direct result of steel recycling.
Keywords: steel reinforcement, residual elements, yield point, ductility, recycled steel.
The full symmetry group of the crystal is called its Space group. The elements of space group are Combinations of the point group operations and translations. The 440 Ferroelectric space groups, viz the Heesch –shubnikov space groups, which are symmetry groups of Ferroelectric electric-dipole arrangements in crystals are already derived [4]. In this paper, we show that although Ferromagnetotoroidic point groups are 57, the number of Ferromagnetotoroidic spacegroups sum upto 728, and three Ferromagnetotoroidic spacegroups are tabulated by using Opechowski and Guccione symbols.
Keywords: space groups, Ferroelectric space groups, Ferromagnetotoroidic space groups, Magnetic space groups, point groups and grey groups
Titanium Dioxide films were synthesized on glass substrate by using sol-gel spin coating method. The thin film samples were characterized for its structural and optical properties. The synthesis was carried out by optimizing preparative conditions, such as Temperature (T), pH, Concentration, Time to get uniform, adherent and pinhole free films. The prepared films were pre-annealed at 300°C and post-annealed at 500°C. Structural properties of Titanium Oxide thin films were studied by XRD pattern. Scherrer's formula was used to calculate crystallite size. Surface morphological of Titanium Oxide films studied using SEM which shows granular surface. The band gap energy was calculated with the help of UV-VIS Spectroscopy.
Keywords-Titanium Oxide thin films spin coating, sol-gel method, XRD, SEM, UV-Visible Spectroscopy.
This Paper Present to study of the Physico-chemical Parameters of Khudia Dam in Mungeli District, Chhattisgarh. Monthly Changes In Physical and Chemical Parameters Such as Water Temperature, Transparency, Turbidity, Total Dissolved Solids, pH, Dissolved Oxygen, Free Carbon dioxide, and Total Hardness, Chlorides, Alkalinity, Phosphate and Nitrates. Were analyzed for a periods of one year from 1st January 2012 to 31st December 2012. All Parameters were within the Permissible limits. The results indicate that the Dam is Non-polluted and can be used for Domestic, Irrigation and Pisciculture.
Keywords:- Aquatic ,Perennial, Physico-Chemical Parameters, Monthly variation.
The wind energy generation, utilization and its grid penetration in electrical grid are increasing worldwide. The wind generated power is always fluctuating due to its time varying nature and causing stability problem. Unified Power Flow Controller (UPFC) is used to control the power flow in the transmission systems by controlling the impedance, voltage magnitude and phase angle. This controller offers advantages in terms of static and dynamic operation of the power system. A Unified Power Flow Controller (UPFC) is an electrical device for providing fast-sensation on high-voltage electricity transmission networks. UPFC uses a pair of three-phase controllable bridges to produce current that is injected into a transmission line using a series transformer. The controller can control active and reactive power flows in a transmission line. The UPFC is a combination of a static synchronous compensator (STATCOM) and a static synchronous series compensator (SSSC) coupled via a common DC voltage link. The main scope of this paper involves in simulation of DFIG based wind energy conversion system with UPFC using MATLAB/ SIMULINK.
Keywords: DFIG, UPFC, FACTS, Power quality, THD, Harmonics, STATCOM, SSSC.
Frequency analysis plays vital role in the applications like cryptanalysis, steganalysis [6], system
identification, controller tuning, speech recognition, noise filters, etc. Discrete Fourier Transform (DFT) is a
principal mathematical method for the frequency analysis. The way of splitting the DFT gives out various fast
algorithms. In this paper, we present the implementation of two fast algorithms for the DFT for evaluating their
performance. One of them is the popular radix-2 Cooley-Tukey fast Fourier transform algorithm (FFT) [1] and
the other one is the Grigoryan FFT based on the splitting by the paired transform [2]. We evaluate the
performance of these algorithms by implementing them on the TMS320C6748 (fixed point), and
TMS320C5515 DSPs. We developed C programming for these DSP processors. Finally we show that the
paired-transform based algorithm of the FFT is faster than the radix-2 FFT, consequently it is useful for higher
sampling rates. Working at higher data rates is a challenge in the applications of Digital Signal Processing.
Index Terms:- frequency analysis, fast algorithms, DFT, FFT, paired transforms.
The article described to the study of reactions initiated by cavitation that affect the interaction between the molecules of solutions through hydrogen bonds. They can be attributed to applied sonochemistry, and when it comes to the solutions, which are used in food processing or in medicines - to the food and medicaments sonochemisrty. Such reactions do use of sonochemistry in the food industry is safe if taken to prevent the formation in water during cavitation the oxidants such as hydrogen peroxide. This can be achieved if prevented of reactions in the gas phase inside the cavitation bubbles or remove oxygen of air from the solution. A process suppression of unwanted reactions without sacrificing performance sonochemical equipment is described.
Keywords - Сavitation, Sonochemistry
Research activities are ongoing to develop Earth-Air Heat Exchanger (EAHX) with the purpose to achieve a high efficiency and to improve their economical competitiveness. However, there is still a big deficiency in understanding and prediction of soil temperature in various depths on earth. In this paper, tank were proposed in the conventional model and has been investigated using the computational fluid dynamics (CFD) code FLUENT to provide basic knowledge of the Air flow behaviour and to gather the first experience in the application of CFD codes to heat transfer in Earth-Air Heat Exchanger (EAHX). .An Earth-Air Heat Exchanger (EAHX) is a simple subterranean cooling system that utilizes the stable soil temperature that is cooler than ambient temperature in summer. A single pass earth-tube heat exchanger (ETHE) was performed to study its performance in cooling. ETHE is made of 0.5 m long 10 cm diameter ms pipe at inlet and 3.5 m long outlet tank with both wall thickness of 3 mm. A 1 m2 area tank is buried at 3 m deep below surface. Ambient air is supply. Air at 11 m/s. Computational cooling tests was carried out using k-epsilon standard and RNG model. In this paper an earth-to air heat exchanger was considered based on summer cooling system. Numerical model shows ETHE was able to reduce the temperature of hot ambient air by as much as 9.8oC in May. This natural geothermal based system can decrease heating loads and significantly reduce the room air temperature during summer seasons.
Keywords - Earth Tank Heat Exchanger, Earth-air, cooling potential.
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