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Organizing images into (semantically) meaningful categories using low-level visual features is a challenging and important problem in content-based image retrieval. Much machine learning methods has been done on automatic semantic image classification. In this paper, we propose a novel approach for semantic classification of images based on weighted feature(More)
In this paper, the resonant frequency and sensitivity characteristics of Hilbert curve fractal antennas is presented. Several fractal-shaped Hilbert monopoles have been constructed, based on theoretical calculation, EM simulation and measurement. The formulation on resonant frequency of the Hilbert antennas is derived and verified. Experimental results show(More)
Edwardsiella tarda EIB202, a Gram-negative pathogen with strong virulence, is an opportunistic pathogen capable of causing edwardsiellosis with high mortality to fish. Alternative sigma factor 54 (RpoN) is an important regulator of virulence and stress resistance genes in many bacterial species and mainly responsible for transcription of genes in nitrogen(More)
Edwardsiella tarda the etiological agent for edwardsiellosis, a devastating fish disease prevailing in worldwide aquaculture industries was subjected to a molecular genetic study. To research into the influence when RpoN (σ(54) ) and RpoS (σ(38) ) were deleted simultaneously, the double deletion mutant of RpoN (σ(54) ) and RpoS (σ(38) ), namely rnrs, was(More)
The implementation of a high-speed low-power pulse swallow frequency divider for a DRM/DAB frequency synthesizer, using a 0.18-μm CMOS technology, is described. The frequency divider employs a divide-by-32/33 dual-modulus prescaler, a five bits swallow counter, an 11 bits programmable counter, and a control circuit necessary for the time sequence and(More)
A novel low-loss image-reject mixer (IRM) using the source follower isolation method for digital radio mondiale/digital audio broadcasting applications is presented. It is based on double-quadrature mixers (DQMs) and passive polyphase filters (PPFs). The DQM is designed with four passive CMOS mixers. A source follower is inserted between the RF PPF and DQM(More)
In this paper, a broadband CMOS differential LNA for DC∼2 GHz software defined radio is proposed. The channel thermal noise and the flicker noise of input MOSFET is canceled by exploiting a noise-canceling technique. A lower noise figure and an excellent wide-band input matching can be achieved at the same time. Moreover, the distortions introduced(More)