量子漫步算法能模拟游走粒子在图上的量子相干演化,粒子的运动状态由量子态的相干叠加而成.与经典随机游走算法相比,量子漫步算法具有寻找目标节点时间少和源节点扩散至其他节点时间少的优点.提出一种基于离散时间量子漫步的链路预测(li...量子漫步算法能模拟游走粒子在图上的量子相干演化,粒子的运动状态由量子态的相干叠加而成.与经典随机游走算法相比,量子漫步算法具有寻找目标节点时间少和源节点扩散至其他节点时间少的优点.提出一种基于离散时间量子漫步的链路预测(link predictionbased on discrete time quantum walk,简称LP-DTQW)算法.研究结果表明:相对于其他7种算法,LP-DTQW算法有更高的预测精度;LP-DTQW算法的时间复杂度远低于经典RWR(random walk with restart)链路预测算法的时间复杂度.因此,LP-DTQW算法具有更强的预测性能.展开更多
Ag-Pt bimetallic nanoparticles decorated on MWCNTs/PANI nanocomposites have been synthesized by in-situ chemical oxidative polymerization and chemical co-reduction method. The Fourier transform infrared（FT-IR） spect...Ag-Pt bimetallic nanoparticles decorated on MWCNTs/PANI nanocomposites have been synthesized by in-situ chemical oxidative polymerization and chemical co-reduction method. The Fourier transform infrared（FT-IR） spectroscopy, X-ray diffraction（XRD）, ultraviolet-visible（UV-vis） absorption spectroscopy, scanning electron microscopy（SEM） and transmission electron microscopy（TEM） were used to characterize the morphology and structure of the nanocomposites. It can be observed that the PANI was uniformly grown along the MWCNTs to form MWCNsT/PANI fiber-like nanocomposites with diameter about 60 nm, and the Ag-Pt binary nanoparticles were decorated onto MWCNTs/PANI with particle sizes around 6.8 nm. Cyclic voltammetry（CV） and electrochemical impedance spectroscopy（EIS） were used to characterize the electrochemical performance of the prepared electrode. The results demonstrated that the obtained MWCNTs/PANI/Ag-Pt electrode displayed a good electrochemical activity and fast electron transport, which has potential applications in biosensors and supercapacitors.展开更多
乙型肝炎病毒(hepatitis B virus,HBV)感染母亲能否母乳喂养其子女是重要的临床问题。本文总结了在使用乙型肝炎免疫预防前后,母乳喂养和人工喂养婴儿的HBV垂直传播率的相关研究。结果显示,尽管感染HBV的母亲乳汁中存在病毒,但2种喂养...乙型肝炎病毒(hepatitis B virus,HBV)感染母亲能否母乳喂养其子女是重要的临床问题。本文总结了在使用乙型肝炎免疫预防前后,母乳喂养和人工喂养婴儿的HBV垂直传播率的相关研究。结果显示,尽管感染HBV的母亲乳汁中存在病毒,但2种喂养方式的垂直传播率相似,证明母乳喂养不增加垂直传播风险。结合母乳喂养对婴儿和母亲的各种益处,应鼓励感染HBV的母亲母乳喂养其子女。展开更多
文摘量子漫步算法能模拟游走粒子在图上的量子相干演化,粒子的运动状态由量子态的相干叠加而成.与经典随机游走算法相比,量子漫步算法具有寻找目标节点时间少和源节点扩散至其他节点时间少的优点.提出一种基于离散时间量子漫步的链路预测(link predictionbased on discrete time quantum walk,简称LP-DTQW)算法.研究结果表明:相对于其他7种算法,LP-DTQW算法有更高的预测精度;LP-DTQW算法的时间复杂度远低于经典RWR(random walk with restart)链路预测算法的时间复杂度.因此,LP-DTQW算法具有更强的预测性能.
基金Funded by National Natural Science Foundation of China(Nos.51371129 and 11174226)Hubei Science and Technology Supported Project(No.YJG0261)+1 种基金Wuhan Science and Technology Research Project(No.2014010101010002)the Key Project of Guangdong Province(No.2013B090500078)
文摘Ag-Pt bimetallic nanoparticles decorated on MWCNTs/PANI nanocomposites have been synthesized by in-situ chemical oxidative polymerization and chemical co-reduction method. The Fourier transform infrared（FT-IR） spectroscopy, X-ray diffraction（XRD）, ultraviolet-visible（UV-vis） absorption spectroscopy, scanning electron microscopy（SEM） and transmission electron microscopy（TEM） were used to characterize the morphology and structure of the nanocomposites. It can be observed that the PANI was uniformly grown along the MWCNTs to form MWCNsT/PANI fiber-like nanocomposites with diameter about 60 nm, and the Ag-Pt binary nanoparticles were decorated onto MWCNTs/PANI with particle sizes around 6.8 nm. Cyclic voltammetry（CV） and electrochemical impedance spectroscopy（EIS） were used to characterize the electrochemical performance of the prepared electrode. The results demonstrated that the obtained MWCNTs/PANI/Ag-Pt electrode displayed a good electrochemical activity and fast electron transport, which has potential applications in biosensors and supercapacitors.
文摘乙型肝炎病毒(hepatitis B virus,HBV)感染母亲能否母乳喂养其子女是重要的临床问题。本文总结了在使用乙型肝炎免疫预防前后,母乳喂养和人工喂养婴儿的HBV垂直传播率的相关研究。结果显示,尽管感染HBV的母亲乳汁中存在病毒,但2种喂养方式的垂直传播率相似,证明母乳喂养不增加垂直传播风险。结合母乳喂养对婴儿和母亲的各种益处,应鼓励感染HBV的母亲母乳喂养其子女。
