Feifei Huang

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In this paper we propose an algorithm to multi-robot cooperative Simultaneous Localization and Mapping (SLAM) with monocular camera mounted on each robot. The map consists of a sparse set of features, and the feature is prominent in the environment that robots explored, we call it salient landmark. The scene of exploration is typical office environment.(More)
This work reports the enhanced emission at 2.7 µm in Er 3+ /Ho 3+-codoped fluorotellurite glass upon a conventional 980 nm laser diode. The significantly reduced green upconversion and 1.5 µm emission intensity in Er 3+ /Ho 3+-codoped samples are observed. The results suggest that the Er 3+ : 4 I 13/2 state can be efficiently depopulated via energy transfer(More)
IceCube is a one-gigaton instrument located at the geographic South Pole, designed to detect cosmic neutrinos, identify the particle nature of dark matter, and study high-energy neutrinos themselves. Simulation of the IceCube detector and processing of data require a significant amount of computational resources. This paper presents the first detailed(More)
Computed tomography (CT) technology has been used in many fields. But the slow speed of CT image reconstruction is unbearable in some situation. The parallel processing based on graphic processing unit (GPU) is a great option to accelerate the speed of CT image reconstruction. But the general purpose GPU program model is difficult to use for the texture(More)
This paper proposed a limit-cycle based algorithm for cooperative hunting task using multiple mobile robots. By integrating the model-based system and the behavior-based system, a hybrid distributed control system is established, which emphasizes on the autonomy and intelligence of each robot. On the one hand, the algorithm uses artificial potential field(More)
AlF3-based glasses (AlF3-YF3-CaF2-BaF2-SrF2-MgF2) with enhanced thermal and chemical stability were synthesized and compared with the well-known fluorozirconate glass (ZBLAN). The 2.7 μm mid-infrared emission in the AlF3-based glasses was also investigated through the absorption and emission spectra. Both the temperature of glass transition and the(More)
2.0 μm emission properties of Er3+/Ho3+ codoped silicate glasses were investigated pumped by 980 nm LD. Absorption spectra were determined. Intense mid-infrared emissions near 2 μm are observed. The spectral components of the 2 μm fluorescence band were analyzed and an equivalent model of four-level system was proposed to describe broadband 2 μm emission.(More)