通过作者查论文: Dan Li

文章题目页数

作者: J.Z. Zhang, Dan Li, Ming Jun Chen, Shen Dong
231
作者: Xu Liang Deng, M. M. Xu, Dan Li, Gang Sui, X. Y. Hu, Xiao Ping Yang
摘要: Novel Poly(l-lactic acid) (PLLA)/ Multi-walled carbon nanotubes (MWNTs)/ hydroxyapatite (HA) nanofibrous scaffolds with high porosity and well-controlled pore architectures were prepared via electrospinning techniques. The structure, morphology, molecular weight change of the scaffolds were investigated using scanning electron microscopy (SEM). The results noticed that the average diameter of hybrid nanofiber was similar to that of PLLA/HA fiber, but the surface of hybrid fibers was much coarser because of the introduction of MWNTs nano-particles. The biocompatibility of the scaffold has been investigated by human Dental Pulp Stem Cells (DPSCs) cell culture on the scaffold. The preliminary results showed that cells were well adhered and proliferated on the hybrid scaffolds as well as PLLA/HA fibers. Based on the experimental observations, the aligned nanofibrous PLLA/ MWNTs /HA scaffold could be used as a potential candidate scaffold in dental tissue engineering.
393
作者: M. M. Xu, Fang Mei, Dan Li, Xiao Ping Yang, Gang Sui, Xu Liang Deng, X. Y. Hu
摘要: Efficacy of poly(L-lactic acid) (PLLA)/nano-hydroxyapatite(HA) hybrid nanofibrous scaffolds for dental tissue engineering is described and their performance on normal cells with MG-63 is compared as well in this study. Perfectly PLLA/HA fibrous scaffolds were fabricated by an electrospinning process under optimal condition. Cell culcure and adenovirus encoding green fluorenscent protein technique were used to study the morphology of cells grown on the scaffolds. The results show that the growth of DPSCs and PCs is well observed attached to the PLLA/HA fibers, as well as MG-63, which indicate that the nanofibrous PLLA/HA scaffold could be used as a potential cell carrier in dental tissue engineering.
377
作者: H.X. Wang, Wen Jun Zong, Dan Li, Shen Dong
摘要: In this paper, a new cutting force model is presented for diamond turning, and the ‘size effect’ is also integrated into this new model. Utilizing this new model, the effects of feed rate and depth of cut on cutting forces are analyzed, the specific law of cutting forces in micro thin-layer metal cutting is investigated at the same time. Through the detailed theoretical analysis and experimental validations, it is found that if the selected feed rate or depth of cut is less than a certain value, a particular phenomenon will appear, thus the thrust cutting force Fp is greater than the principal cutting force Fc, especially when the depth of cut or feed rate is of the same order as the rounded cutting edge radius. For the micro thin- layer metal cutting, the smaller the feed rate and depth of cut, the greater is the influence of these two parameters on cutting forces.
634
作者: Chul Jin Choi, Oleg V. Tolochko, Dan Li, Byoung Kee Kim
519
作者: S. Zhang, Dan Li, J. Sun
摘要: A new approach for power system frequency estimation is proposed. The approach consists of two stage adaptive notch filters. The first stage eliminates harmonics and enhances the fundamental waveform. After the down-sampled processing, the second stage produces an accurate estimate of the fundamental frequency. The notch filter is based on all-pass filter with an efficient lattice structure and is simple to realize. Simulation is presented to demonstrate the effectiveness of the algorithm.
673
显示16个文章标题中的1到10个