Ad exchanges are kind of the most popular online advertising marketplaces for trading ad spaces over the Internet. Ad exchanges run auctions to sell diverse ad spaces on the publishers’ web-pages to advertisers, who want to display ads on ad spaces. However, the parties in an ad auction cannot verify whether the auction is carried out correctly or not. Furthermore, the advertisers are usually u...

In this work we present a result on linear diffusion equations with point controls. This is the first partial result obtained along the completion of [5] which includes more general nonlinear diffusion equations. The main focus here is showing how recent variational principles based on Wasserstein metric, used to solve homogeneous diffusion equations, can actually be extended to solving nonhomo...

A new technique, Bi-Level Weighted Histogram Equalization (BWHE) is proposed in this paper for the purpose of better brightness preservation and contrast enhancement of any input image. This technique applies bi-level weighting procedure on Brightness preserving Bi-Histogram Equalization (BBHE) to enhance the input images. The core idea of this method is to first segment the histogram of the in...

We have employed a few-parameter estimation (FPE) technique to derive information on past surface temperature variations from present-day borehole temperatures. Synthetic experiments show that the FPE t•hnique can separate reasonably well information on century-long trends of surface temperature change from borehole temperatures within a .wide range of noise levels. The technique also allows a ...

This article presents the latest developments of an algebraic multigrid (AMG) based on full potential equation (FPE) solver for transonic flow problems with emphasis on advanced applications. The mathematical difficulties of the problem are associated with the fact that the governing equation changes its type from elliptic (subsonic flow) to hyperbolic (supersonic flow). The flow solver is capa...

In this paper, we propose a moving object extraction technique for MPEG coded data directly. It is a changebased motion object extraction approach, which discriminates background and moving objects by means of the higher-order statistics (HOS) performed on the interframe differences of DC image. The DC image is partly decoded picture from the compressed video for the rapid reconstruction of ima...

State filters can be used to produce online estimates of the state of a process. If an exact model for the true process is not known, but multiple candidate models are available to describe the current behavior of the true system, it is necessary to select that model that leads to the optimal state estimates. This paper describes a novel approach for model selection for state estimation by comp...

This paper examines the issue of the effect of international trade on quality choice by firms in a factor-endowment framework. Factor price equalization implies product quality equalization. In the NorthSouth context it means that the South catches up with the North in product quality due to the competitive pressure from international trade, not because of technology adoption. Free trade may in...

Brightness preserving histogram equalization (BPHE) technique was used to enhance the features to discriminate three dates varieties (Khalas, Fard and Madina). Mean, entropy and kurtosis features were computed from the enhanced images and used in an Artificial Neural Network classifier. The classification efficiency of 4 sets of hidden neurons (5, 10, 20, and 30) was tested and the network with...

Wild, M., Cover preserving embedding of modular lattices into partition lattices, Discrete Mathematics 112 (1993) 207-244. When is a finite modular lattice couer preserving embeddable into a partition lattice? We give some necessary, and slightly sharper sufficient conditions. For example, the class of cover preserving embeddable modular lattices strictly contains the class of acyclic modular l...