Junchao Lv

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SiO<inf>2</inf> nanowires structures have been grown by a simple thermal evaporation method using C and SiO<inf>2</inf> as the source materials at a relatively low. The as-synthesized products were characterized by scanning electron microscopy, electron energy-dispersive X-ray (EDX), X-ray powder diffraction (XRD), Raman spectroscopy (RS) and(More)
Linear classification is an important technique in machine learning and data mining, and development of fast optimization methods for training linear classification models is a hot research topic. Stochastic gradient descent (SGD) can achieve relatively good results quickly, but unstable to converge. Limited-memory BFGS (L-BFGS) method converges, but takes(More)
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