we propose a wavelet based regression function estimator for the estimation of the regression function for a sequence of ?-missing random variables with a common one-dimensional probability density function. some asymptotic properties of the proposed estimator based on block thresholding are investigated. it is found that the estimators achieve optimal minimax convergence rates over large class...

Recent in situ observations during Critical Ionization Velocity (CIV) experiments under the CRIT project produced puzzling results, apparently at odds with current ClV theories. It is shown that incorporation in the theory of lower hybrid wave (LHW) instabilities of strong turbulence and finite size effects results in reconciliation of the theory with the observations.

Memory is an important part of any electronic device. In today's world static random access memory (SRAM) is widely used as memory. The major issues for design of SRAM are power loss, delay and stability. This paper presents a modified form of a symmetric eight-transistor SRAM bit-cell. In this paper transmission gate has been used as access transistor which provides rail-to-rail swing. Moreove...

We propose a wavelet based regression function estimator for the estimation of the regression function for a sequence of ?-missing random variables with a common one-dimensional probability density function. Some asymptotic properties of the proposed estimator based on block thresholding are investigated. It is found that the estimators achieve optimal minimax convergence rates over large class...

This is a general review of the existing climatological models of ionospheric radio scintillation for high and equatorial latitudes. Trans-ionospheric communication of radio waves from transmitter to user is affected by the ionosphere which is highly variable and dynamic in both time and space. Scintillation is the term given to irregular amplitude and phase fluctuations of the received signals...

During operation in transit, rails are exposed to the combined effects of various loads (power, temperature, atmospheric), under influence which complex and usually interrelated processes occur rail metal: plastic deformation metal, development types irregularities on surface rolling head. The occurrence injuries their development, internal defects contact fatigue origin. All this leads signifi...

According to the results of derailment investigations, ensuring train traffic safety was found be a paramount and urgent task. The growth freight density speed movement on railway network leads significant increase in number damaged wheels rails and, as result, an level force interaction during load transfer, which provokes likelihood wagon derailment. operation rolling stock railways is determ...

This paper details the field-testing approach and results of thermite welds used in railway applications. Rail steels made from R260 grades are welded by two different processes: standard process according to European standards, a recent technology. Welds introduced same testing location ensure comparable loading conditions aim studying their degradation behaviours. The total testing-period is ...

The article considers the tasks associate with study of dynamic processes interaction between rolling stock and railways. Studies a wheel rail, fitting vehicle into curves when modeling critical emergency situations do not allow oversimplification basic differential equations. And they should be based on exact nonlinear equations that take account entire set geometric kinematic relationships wi...

An eXtended Stochastic Finite Element Method has been recently proposed for the numerical solution of partial di erential equations de ned on random domains. This method is based on a mariage between the eXtended Finite Element Method and spectral stochastic methods. In this paper, we propose an extension of this method for the numerical simulation of random multi-phased materials. The random g...