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Lightning performance of transmission lines is an important issue of major interest for electric utility companies. Now a days, with the increasing requirement for power quality, this matter has been deserving even more attention. In some research reduced scale has been taken into account for analysis as it is better for understanding and also for simulation. But usually in real life, actual tower...
Immense improvement in power system stability can be achieved by the inclusion of Voltage Source Converter (VSC) based Back to Back (BtB) HVDC in the system. In this paper, a single machine infinite bus (SMIB) power system incorporating VSC based BtB HVDC is considered for dynamic stability assessment and linearised model of the system is presented. The system dynamic response is analyzed under small...
This paper presents a new histogram equalization technique, based on gradient and threshold values. The background pixels of the image are associated with low gradient intensities and the detailed pixels are associated with high gradient intensities. The threshold value is usually used for segmentation. In the proposed method, at first the image has been divided into two regions according to the ascending...
The nearest neighbor query of spatial dataset is an important issue in spatial data query area. In order to overcome the disadvantages of existing spatial index structure in data organization and querying, the new nearest neighbor query methods and pruning rules were proposed based on RBRT tree. The NN RT search algorithm was given. The NN_RT search approach calculated and pruned nodes of each level...
The multimode interference (MMI) coupler is a versatile component for photonic signal processing applications. In present day, research scenarios based on low-index-contrast MMI couplers give more scope of study as it has certain advantages over high-index-contrast MMI couplers. In this work we presented an optimal design for the low-index-contrast MMI coupler. From various possible structures, we...
In this paper, a robust and secure dual stages digital image watermarking scheme is proposed for copy right protection in SVD domain. In order to provide high security, the proposed scheme used Logistic map to encrypt the primary watermark and Arnold's cat map to scramble the cover image. The proposed scheme also used singular value decomposition (SVD) technique to decompose the scrambled cover image,...
Ultrasound based strain imaging is a promising non-invasive method to diagnosis tumors or cancers since tissue stiffness indicates the physiological as well as pathological states of living bodies. But linear ultrasound wave theory based strain images suffer from low signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR), poor spatial resolution and image artifacts. Applications of nonlinear...
This paper proposed a correlation based method using the autocorrelation function and the YIN. The autocorrelation function and also YIN is a popular measurement in estimating pitch in time domain. The performance of these two methods, however, is effected due to the position of dominant harmonics (usually the first formant) and the presence of spurious peaks introduced in noisy conditions. The experimental...
Under this present study, thermal and mechanical behaviors dependence of insulating fire bricks (produced by burnout process) on coal percentage (mass %) were investigated. Waste coal powders or coal dust were collected from mines, transport vehicles, storage areas etc. Specimen insulating bricks were produced by uniaxial pressing in a steel mould. The main materials were fireclay consisting of silica...
Fast broadcasting (FB) is a popular near video-on-demand system where a video is divided into equal size segments those are repeatedly transmitted over a number of channels following a pattern. For user satisfaction, it is required to reduce the initial user waiting time and client side buffer requirement at streaming. Use of additional channels can achieve the objective. However, some augmentation...
Influenza is a viral disease that usually affects the nose, throat, bronchi, and seldom lungs. This disease spreads as seasonal epidemics around the world, with an annual attack rate of estimated at 5%–10% in adults and 20%–30% in children. Thus, influenza is regarded as one of the critical health hazards of the world. Early diagnosis (consisting of determination of signs and symptoms) of this disease...
In the recent epoch smartphone has become increasingly popular & its acceptance is inflating at an astonishing rate. At the present time people use their smartphone to accumulate important or private files & also to effectuate almost all the official & business works. So losing phone can be caused unbearable sufferings; such as private or official files can be wielded by others or the...
We propose a mathematical procedure for finding informed trader activities in underlying asset and derivatives. We generalized it as Vector ARMA and found condition of its stationarity. We also constructed an informed trader activity presence criterion. For validation of the model, we test an influence of informed traders in Russian market and FX assets. We found some evidence of such influence in...
The problem of constructing flexible process models is very urgent nowadays. The structure of flexible processes may be changed either at configuration or runtime stages. Therefore, the flexible process model can be further adapted to the specific implementation conditions in static and dynamic modes. The process model can be constructed by traditional methods, involving domain experts, and by process...
With the development of cloud computing and virtualization technology, it has been widely used in the construction of the campus network. With the support of cloud computing and virtualization technology, it is no longer a single network bandwidth limitation, but allocates network bandwidth dynamically and join the considerations of virtual machine network weight, enabling rational use of network...
Graphite nanosheets / Titanium dioxide composites (GN/TiO2) were fabricated via sol-gel method which use tetrabutyl titanate as Ti source and different ratio of GN/TiO2 were prepared. The composites were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The photocatalytic properties of GN/TiO2 composites were evaluated by using Methyl orange. XRD results indicate...
The polymer/inorganic nanometer composite dielectric film with good mechanical, electrics and thermal properties, has become a highlight in the field of materials research. MMT and TiO2 are doped into the polyimide to study the influence of the mass ratio of MMT and TiO2 on the structure of polyimide matrix nanocomposite materials. In this paper different components of MMT are doped into the PI/(TiO...
We present a novel computational method to predict a protein as it is toxic or not, from sequence only. The main challenge lies in the fact that neither there is any specific feature nor there is any range of values in the respective structural features supported by all toxic proteins. To resolve this challenge, we have proposed and implemented a new approach. Here, at first we collect a large amount...
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