Most techniques for suppressing grating lobes in phased arrays while relaxing the interelement spacing requirement involve redistributing array elements in sparse aperiodic patterns, or varying the transmit-receive beam patterns. An alternative is presented which uses oversized array elements to eliminate grating lobes as a direct consequence of the element shape. It is shown that by using care...

high congestion of returned product at remanufacturing facility causes substantial delays and consequently remarketing value losses for time-sensitive and high-tech products with short life cycles, such as electronic equipments. at the remanufacturing site the returned product are inspected and classified according to their quality and processing time in one of the two classes: class 1 being ad...

The maximum inner product search (MIPS), which finds the item with highest a given query user, is an essential problem in recommendation field. Usually e-commerce companies face situations where they want to promote and sell new or discounted items. In these situations, we have consider following questions: Who interested items, how do find them? This article answers this question by addressing...

Fractional Brownian motion is a mean zero self-similar Gaussian process with stationary increments. Its covariance depends on two parameters, the self-similar parameter H and the variance C. Suppose that one wants to estimate optimally these parameters by using n equally spaced observations. How should these observations be distributed? We show that the spacing of the observations does not affe...

Probability distributions and their families play an effective role in statistical modeling analysis. Recently, researchers have been increasingly interested generating new with high flexibility low number of milestones. We propose study a family continuous distributions. Relevant properties are presented. Many bivariate versions the derived under Farlie-Gumbel-Morgenstern copula, modified Clay...

In this paper, we propose a new extension of the traditional Rayleigh distribution called modified Kies distribution. The contains one scale and shape parameter its hazard rate function can be increasing bathtub-shaped. Some mathematical properties are derived including quantiles moments. parameters estimated based on progressively Type-II censored data. For purpose, consider two estimation met...

The experiment was conducted at the Agronomy field of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during August, 2008 to January 2009 to find out the optimum plant spacing and number of seedling per hill in relation to tillering and dry matter accumulation of transplanted rice plant. The experiment was carried out with three plant spacings (S =15 cm × 20 cm, S = 20 cm × 20 cm and S...

In the LHC beam pipe, an electron cloud can build up due to photoemission from synchrotron radiation and via a beam-induced multipacting process. This electron cloud gives rise to an additional heat load on the beam screen which protects the cold bore of the superconducting magnets. The heat load from the electron cloud depends on beam parameters such as the bunch intensity, the number of bunch...