This paper investigates a multi-period vehicle loading problem with stochastic information regarding the release dates of items to be transported. The deterministic version of the problem can be formulated as a large-scale set covering problem. Several heuristic algorithms are proposed to generate decision policies for the stochastic optimization model over a long rolling horizon. The resulting...

The present time, denoted at n = 0 and the expiration time, denoted at n = N . The lower case letter n, k (and occasionally i, j,m) will be used to denote the time variable. The notation Sk (or Sn, Si, Sj · · · ) denotes the value of the stock (the underlying) at time k (or time n, i, j · · · ). An important convention we’ll use is that S0 will always be a constant, that is the present value of...

In certain complex optimization tasks, it becomes necessary to use multiple measures to characterize the performance of di erent algorithms. This paper presents a method that combines ordinal e ect sizes with Pareto dominance to analyze such cases. Since the method is ordinal, it can also generalize across di erent optimization tasks even when the performance measurements are di erently scaled....

In this note, we compare four different exploration strategies and analyze the performance in terms of exploration time and amount of exploration per time step. In order to provide a suitable reference for comparison, we derive an upper bound for the theoretically achievable increase of explored area per time step. The comparison itself is done using a comprehensive empirical evaluation resulti...

SvPablo is a language independent performance analysis and visualization system that supports analysis of applications written in a variety of languages and executing on both sequential and parallel systems. In addition to capturing application data via software instrumentation, SvPablo also exploits hardware performance counters to capture the interaction of software and hardware. Both hardwar...

The demand for high-speed mobile wireless communications is rapidly growing. OFDM technology promises to be a key technique for achieving the high data capacity and spectral efficiency requirements for wireless communication systems of the near future. In our proposed method Adaptive modulation techniques is used for maximizing the data throughput of subcarriers allocated to a user. It measures...

This paper defines a new utility importance of a state of a component in multi-state systems. This utility importance overcomes some drawbacks of a well-known importance measure suggested by William S. Griffith (J. Applied Probability, 1980). The relationship between this new utility importance and the Griffith importance is studied and their difference is illustrated with examples. The contrib...

We refer to all-optical networking segments as to a portion of an all-optical path which requires particular consideration for wavelength routing, e.g. administrative or technological boundaries, and analyze end-to-end blocking of connection requests.