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A topological mapping and navigation system based on natural landmarks for mobile robots is presented. The landmarks are extracted from natural scenes based on visual saliency, whose relationships are captured by hidden Markov model to distinguish similar scenes. Based on those, the vertex of topological map is built. A competitive learning is designed to evaluate the availability of landmarks according...
On shared memory multiprocessors, synchronization often turns out to be a performance bottleneck and the source of poor fault-tolerance. By avoiding locks, the significant benefit of lock (or wait)-freedom for real-time systems is that the potentials for deadlock and priority inversion are avoided. The lock-free algorithms often require the use of special atomic processor primitives such as CAS (compare...
Public sentiment reflects the people's attitude to society and politics. Through a large amount of observation, we found that the trends of the development of many typical Web public sentiments can be divided into three phases: relatively stable phase, rapidly increased phase and rapidly declined phase. The correct phase detection and prediction win precious time for relevant department to formulate...
The classical union-find algorithm is the basis for many graph algorithms and for dealing with equality. The easiest way to implement concurrent objects is by means of classical software solutions, but this leads to blocking when the process that holds exclusive access to the object is delayed or stops functioning. Thus we require our solutions to the data structure problem have the lock-free property...
Spirulina is considered to be a good food and medicinal resource. However, its calcium content is relatively low compared with the other nutritional components. Therefore, to improve the calcim content of Spirulina, a new kind of Spirulina, calcium-rich Spirulina was developed by the bioaccumulating ability of Spirulina. To assess the influence of the Spirulina on the health of animal, the present...
Web document classification is the process of grouping web documents into one or more predefined categories based on their content. It is an important component of web monitor system that can assist people to reduce the dissemination of harmful information. This paper proposes a combined approach for building a decision tree with the multilayer neural network as its categorically value function, and...
To study effective speech features which can represent different emotion styles in infant voice, nonlinear features based on Teager Energy Operator are investigated. Neutral state and 4 emotional states (i.e. happiness, impatience, anger and fear) are classified from the infant voice database. MFCC extraction and HMM-based emotion classification are used as baseline system to evaluate the emotional...
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