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A method for 3-D seismic refraction tomography is presented. We have applied a new approach for processing 3D seismic refraction data using waveform modeling to image underground pipes using short channel spacing. This approach successfully obtained accurate high definition 3D ground model. More than 10 surveys were done to image underground pipes and voids. The purpose of this study is to test the...
As the flooding of malicious codes such as worms, how to analyze large number of malicious samples quickly and effectively becomes a great issue for researchers in network security. This paper proposed an analysis algorithm for worm network behavior based on event sequence, which uses the data flow recombination and compression methods to process the pure malicious data. With this algorithm, one can...
We propose a space-time block coding framework based on linear precoding. The codes for P transmit antennas are formed by transmitting the information vector (with P independent information symbols) L times where each time it is rotated by a distinct precoding matrix. The framework generalizes conventional spatial multiplexing techniques and facilitates tradeoff between rate and diversity. We propose...
In scientific workflow systems, time related functionalities such as workflow scheduling and temporal verification normally require effective forecasting of activity durations due to the dynamic nature of underlying resources such as Web or grid services. However, most existing strategies cannot handle well the problems of limited sample size and frequent turning points which are typical for the duration...
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