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Intelligent systems are desired in dynamic fault diagnoses for large and complex systems such as nuclear power plants. Dynamic uncertain causality graph (DUCG) is such a system presented previously. This paper extends the DUCG methodology to deal with negative feedbacks, which is one of the most difficult problems in fault diagnosis, and predicts the fault development online. Two methods are presented...
By depicting trade strategy imitation among investors and stock price forming mechanism, we establish an artificial stock market model based on heterogeneous investors with the method of mean field approximation. The model considers both behavioral heterogeneity of investors and structural heterogeneity of investor network. The simulation results reveal that in certain parameter interval, the stock...
In the new historic opportunity, it is very urgent to verify, measure and evaluate the location-specific advantages and disadvantages of embedding multi-national corporation value chain in Liaoning province objectively, by using empirical analysis method. The cluster analysis showed that Liaoning's attractive power of market capability is above the average level of the country. And the attractive...
This paper proposes a differential codebook-based method to reduce the feedback overhead for closed-loop MIMO-OFDM systems. With the assumed multimode transmit precoding, both the number of data streams (rank) and the index of precoding matrix are fed back to the transmitter at each sub-band. By exploiting the channel correlation in frequency domain, an enhanced differential codebook (a subset of...
An issue pertinent to the design of checkpointing protocols is how to improve the autonomy of checkpointing and keep computation loss under control. To address the problem, a time-based multi-cycle checkpointing protocol is proposed in this paper. In this protocol, processes are allowed to take checkpoints with desired checkpoint cycles. To enable recent checkpoints to be used to form a consistent...
Channel estimation based on two-dimensional discrete- time Fourier transform interpolation (2D-DFTI) is suitable for orthogonal frequency division multiplexing (OFDM) systems because of its robustness to doubly-selective fading channels and high computational efficiency. However, its performance will degrade significantly for packet OFDM systems with virtual subcarriers due to the Gibbs phenomenon...
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