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Polysomnography (PSG) is the standard method for obstructive sleep apnea hypopnea syndrome (OSAHS) diagnosis in medical, but the shortcomings in it have pushed many researchers to find a more convenient and effective way to detect OSAHS. With this purpose, a new technique for OSAHS assessment is proposed in this paper. It combined the properties of respiratory events with an ingenious dynamic threshold...
This paper presents the results of numerical study on the optimal control strategy of nonlinear stochastic systems. The systems under investigation are mechanical oscillators and a damping device. The numerical approach to obtain the optimal control strategy involves solving a nonlinear partial differential equation — the Hamilton-Jacobi-Bellman equation. Since civil engineering structural systems...
As is known to all, there are many kinds of wood. If we distinguish the wood's characteristics by our eyesight, we can't distinguish the category and property of the wood correctly, and this way will cost enormous workload. In this paper, we propose the keyblock distribution based wood image retrieval algorithm, in order to make the wood image retrieval algorithm more precise and objective. Keyblocks...
Most previous sequential mining algorithms have the following two main drawbacks: On one hand, all sequential patterns are treated uniformly while sequential patterns have different importance. On the other hand, most of the sequence mining algorithms still generate an exponentially large number of sequential patterns when a minimum support is lowered. In this paper, a weighted closed sequential pattern...
It is well-recognized that the main factor that hinders the applications of association rules (ARs) is the huge number of ARs returned by the mining process. To solve this problem, an algorithm for mining concise association rules based on generators and closed itemsets is proposed. Firstly, the concept of concise association rule is proposed, and the rationality of the definition is explained based...
The railway enterprises in China have improved their capability of independent innovation and have effectively offered the precondition of the six speed-ups through the unique technology transition model. Based on the analysis of the internal, external and opportunity driving factor which motivating the realization of the railway enterprises technology transitions in China, a model used to measure...
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