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This paper is mainly concerned with the application of a kind of distinctive local invariant feature i.e. Lowe's SIFT feature for the purpose of CBIR, instead of the usually used global feature and local statistical feature based on image segmentation. In our CBIR system, the visual contents of the query image and the database images are extracted and(More)
The developmental characteristics of root border cells (RBCs) and their role in protection of root apices of rice seedling from Al toxicity were evaluated in two rice (Oryza sativa L.) cultivars differing in Al tolerance. Root elongation and RBCs viability were used as indicators for Al effects. The formation of RBCs and the emergence of the root tip(More)
This paper proposes a new control method for deep field-weakening operation of permanent magnet synchronous machines (PMSMs). With single current regulator (SCR) and voltage angle control (VAC), the new method can achieve much higher field-weakening speed rate than conventional methods. The SCR-VAC method makes full usage of the DC bus voltage so that(More)
OBJECTIVES To better realize the features of peripheral blood (PB), bone marrow (BM) aspirate and especially BM trephine biopsy in atypical chronic myeloid leukemia (aCML). METHODS We studied PB, BM smears in 35 cases of aCML and compared with 84 cases of chronic granulocytic leukemia chronic phase (CGL-CP), 39 cases of chronic myelomonocytic leukemia(More)
Compressed sensing theory is a newly developed theory which unites the signal sampling and compression, based on the sparsity characteristic of signal. The union can reduce sampling rate, and then reduce computational complexity of the system without the loss of the performance of the system. The paper describes the theoretical frame and some key technical,(More)
Temperature transmission technology plays an important role in the industrial production, but the security and reliability of data can not be guaranteed because of its difficult and complex wiring. As for these problems, this paper puts forward a wireless multi-point temperature transmission system with RF chip nRF24L01 for 2.4GHz band and high-precision(More)
High spectral efficiency and flexible data rate access are the main focus of future wireless networks. Multiple channel allocation schemes have the potential of achieving this goal. By assigning multiple slots and/or multiple carriers to one user, it is possible to provide a flexible data rate with quite low complexity. In this article we propose a simple(More)
This paper proposes an environmental compensation algorithm to the general reputation model. The algorithm provides a scheme as a mean to mitigate the detrimental effect of selfish nodes. And it deals for the first time with the security - the environment's influence on node's behavior. It also shows how to establish trusts in different areas with different(More)