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Sparse representation based classification (SRC) as an efficient method has high recognition rate in many pattern recognition applications. Unfortunately, the original SRC method generally requires rigid alignment in classification. In this paper, the feature-based SRC method is addressed by using the PCA-SIFT and SPP-SIFT descriptors, respectively. The presented methods are not only efficient for...
In the current research, a fast, specific, and sensitive sensing probe was designed to detect Toxoplasma gondii DNA based on mechanism of fluorescence resonance energy transfer (FRET), and a magnetic-fluorescent CdTe/Fe3O4 quantum dots (mQDs) was utilized as energy donor, and the BHQ-2 was used as energy acceptor, respectively. The mQDs were prepared stepwisely using Fe3O4 as magnetic core and CdTe...
A tip-grounded waveguide microsensor was proposed to overcome the difficulty of quantitative voltage calibration in electrooptical detection for integrated circuit (IC) test. On this basis, we optimized the thickness of the electrooptical material of the sensor to eliminate the influence of the circuit layout on the measured signals. The improved sensor in return made it possible to calibrate the...
We presented a fast, specific, and sensitive DNA sensing system, which composed of a CdTe/Fe3O4 magnetic core-shell quantum dots (energy donor), a commercial quencher (BHQ2; energy acceptor), and a designed single strand Toxoplasma gondii DNA. The designed single strand Toxoplasma gondii DNA was applied to link the energy donor and acceptor, and target DNA was detected based on mechanism of fluorescence...
We report the suppression of nuclear spin fluctuations in a self assembled quantum dot via coherent dark state spectroscopy, resulting in a factor of 40 enhancement of the coherence time of a single electron spin.
We report the demonstration of coherent population trapping of an electron spin by means of coherent optical spectroscopy of a single negatively charged quantum dot.
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