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Solid-solution BaxSr1−xAl2O4 doped with Eu2+ phosphors with various x were successfully synthesized via conventional solid-state method. The structural properties were characterized by X-ray diffraction and the luminescent properties were studied via photoluminescence spectra. We observed an obvious phase transition in the solid-solution BaxSr1−xAl2O4 host, and the turning point located at around...
Finding suitable developers for a given task is critical and challenging for successful crowdsourcing software development. In practice, the development skills will be improved as developers accomplish more development tasks. Prior studies on crowdsourcing developer recommendation do not consider the changing of skills, which can underestimate developers' skills to fulfill a task. In this work, we...
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