On-line portfolio selection, a fundamental problem in computational finance, has attracted increasing interests from artificial intelligence and machine learning communities in recent years. Empirical evidence shows that stock’s high and low prices are temporary and stock price relatives are likely to follow the mean reversion phenomenon. While existing mean reversion strategies are shown to ac...

Recently, reversible data hiding in encrypted images (RDHEI) based on pixel prediction has been a hot topic. However, existing schemes still employ predictor that ignores changes the diagonal direction during prediction, and labeling scheme is inflexible. To solve these problems, this paper proposes adaptive labeling. First, we design an gradient (AGP), which uses eight adjacent pixels combines...

Software Product Line Engineering (SPLE) promotes the development and maintenance of artifacts that can be reused in families of related software-intensive systems. As product lines are not necessarily disjoint and the development of product line artifacts is a demanding task, utilization of “related” or “similar” product line artifacts for creating or improving the artifacts of a particular pr...

Let ∆A(n, d) denote the largest possible average diameter of a bounded cell of a simple arrangement defined by n hyperplanes in dimension d. We have ∆A(n, 2) ≤ 2+ 2 n−1 in the plane, and ∆A(n, 3) ≤ 3+ 4 n−1 in dimension 3. In general, the average diameter of a bounded cell of a simple arrangement is conjectured to be less than the dimension; that is, ∆A(n, d) ≤ d. We propose line and plane arra...

We consider the scheduling problem of minimizing the average-weighted completion time on identical parallel machines when jobs are arriving over time. For both the preemptive and the nonpreemptive setting, we show that straightforward extensions of Smith’s ratio rule yield smaller competitive ratios than the previously best-known deterministic on-line algorithms. c © 2003 Elsevier B.V. All righ...

This paper presents the design, simulation, and measurement of two low-cost broadband circularly polarized (CP) printed antennas: a single element and an array at C band. The proposed single element antenna is excited by an L-shaped strip with a tapered end, located along the circular-slot diagonal line in the back plane. From the array experimental results, the 3 dB axial ratio bandwidth can r...

On-line portfolio selection has attracted increasing interests in machine learning and AI communities recently. Empirical evidence show that stock’s high and low prices are temporary and stock price relatives are likely to follow the mean reversion phenomenon. While the existing mean reversion strategies are shown to achieve good empirical performance on many real datasets, they often make the ...

Systems of linear differential equations with constant coefficients, as well as Lotka–Volterra equations, with delays in the off–diagonal terms are considered. Such systems are shown to be asymptotically stable for any choice of delays if and only if the matrix has a negative weakly dominant diagonal.