Jianli Ren

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—In iris recognition system, the iris image definition is crucial to recognition effect. The blurred image may increase the rate of false rejection, and also increase the risk of error matching. This paper presents a fast and efficient method, which based on pupil's edge kurtosis, to value the definition of the iris images in this paper. The essential idea(More)
In iris recognition system, the iris image definition is crucial to recognition effect. The blurred image may increase the rate of false rejection, and also increase the risk of error matching. So it’s necessary to evaluate the definition of the iris image. Only when the definition of the image fits our request, we can use it. Considered the(More)
BACKGROUND HIFU has been shown to be a more suitable alternative for the treatment of primary solid tumors and metastatic diseases than other focal heat ablation techniques due to its noninvasive and extracorporeal nature. However, similar to other focal heat ablation techniques, HIFU is still in need of refinements due to tumor recurrence. METHODS In(More)
The commonly used ultrasound (US) molecular probes, such as targeted microbubbles and perfluorocarbon emulsions, present a number of inherent problems including the conflict between US visualization and particle penetration. This study describes the successful fabrication of phase changeable folate-targeted perfluoropentane nanodroplets (termed FA-NDs), a(More)
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