Learn More
Content-based image retrieval (CBIR) has been an active research topic in the last decade. Using just one kind of feature information may cause inaccuracy compared with using more than two kinds of feature information. Aiming at shapebased image retrieval, in this paper we proposed an image retrieval method using the global and local shape features.(More)
High peak-to-average power ratio (PAPR) in multi-carrier systems such as OFDM can significantly reduce power efficiency and performance. Existing methods to mitigate this problem are known in three major categories, i.e. clipping /filtering, convex optimisation and stochastic approach. In this paper, a polynomial phasing scheme is proposed to achieve(More)
In this paper, an effective algorithm is presented to discover positive and negative association rules. Especially, it analyzes the definition of the positive and negative association rules, computational methods of support and confidence level in affairs. It also talks about the conflicted rules problems which are in the positive and negative association(More)
OBJECTIVE To explore the possibility for 17-OHCS, 17-KS, VMA and HVA in urine as indicators of occupational stress identification and evaluation. METHODS 225 policies were investigated by using convenience sampling and cluster sampling methods, occupational stressors, strains, buffer factors and individual factors were measured by questionnaires. The(More)
Land use change is one of the most important scientific research themes in the field of global environmental change. Due to the presence of uncertainty and randomness in the real world, it is difficult to simulate land use change exactly. To address the spatial uncertainty and temporal randomness in land use change, we propose a model for simulating land(More)
In this paper, the basic characteristic of web access information puts forward the improved data mining algorithm in the application of e-commerce industry. Deep analysis of web access to information, it comes from solving real problem from the design of web based access information mining application model. It puts forward several key technical problem(More)