排序方式: 共有17条查询结果,搜索用时 17 毫秒
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Weisheng Hu Yaohui Jin Chun Jiang YUE Wang Xiaodong WANG Chunlei ZHANG Yang Lu Buwei Xu Peigang Hu Qingji Zeng 《光学学报》2003,23(Z1)
We build an automatically switched optical network (ASON) testbed with four optical cross-connect nodes. Many fundamental ASON features are demonstrated, which is implemented by control protocols based on generalized multi-protocol label switching (GMPLS) framework. 相似文献
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采用Nd:YAG固体激光器在SrTiO3(STO)衬底上成功制备了具有c轴取向的过掺杂La1.8Sr0.2CuO4和欠掺杂La1.9Sr0.1CuO4超导薄膜。分别对薄膜的晶体结构、电学输运性能进行了研究。通过晶体结构分析表明超导薄膜沿<001>晶向生长,沉积后的薄膜超导转变温度(TC)随着薄膜厚度(20~200 nm)的增加而逐渐升高,显示薄膜由二维特征向三维特征过渡。在双层薄膜La1.8Sr0.2CuO4/La1.9Sr0.1CuO4结构中,其电学输运性能和所加电场的方向有很大关联,反映出电场的方向影响了超导薄膜中空穴载流子的扩散,进而影响了薄膜的超导转变温度和电学输运性能。 相似文献
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Man Li Di Zhang Yaqi Liu Peigang Ding Yong Ye Yufen Zhao 《Journal of fluorescence》2014,24(1):119-127
A novel colorimetric and off–on fluorescent chemosensor 2 was designed and synthesized, which showed reversible and highly selective and sensitive recognition toward Cr3+ over other examined metal ions in aqueous solution. Upon addition of Cr3+, the solution of chemosensor 2 resulted in a color change from colorless to obvious pink color, these significant changes in color could be used for naked-eye detection. Chemosensor 2 exhibited a stable response for Cr3+ in the range 0–10 μM with a detection limit of 1 ppm. Furthermore, fluorescence imaging experiments of Cr3+ ions in living MGC803 cells demonstrated its value of practical applications in biological systems. 相似文献
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Peigang Li Alexandros Lappas Romain Lavieville Yang Zhang Roman Krahne 《Journal of nanoparticle research》2012,14(7):1-5
LiFePO4?x F x /C nanorods were prepared by room-temperature solid-state reaction and microwave heating. The structure and morphology of the as-prepared materials were analyzed by X-ray diffractometry and transmission electron microscopy. The results shows that the LiFePO4?x F x /C were well crystallized and consisted of nanoparticles with an average diameter of ten to several tens of nanometers, many round grains constituted solid rod-like structure. The length of the rods can be up to several hundreds of nanometers, and their diameters are around 100?nm. The results of electrochemical testing show that the initial discharge capacity of LiFePO3.85F0.15/C is 124.7?mAh?g?1, with a negligible fading after 50 cycles at a constant current density of 1 C at room temperature. The capacity retention rate is 99.5?%, which is higher than that of LiFePO4/C prepared by the same method. The doping of F helps improve electrical conductivity and Li+ diffusion of LiFePO4/C. This study may provide new insights and understanding on the effect of F-doping on the electrochemical performance of LiFePO4/C. 相似文献