Double-image sharing encryption based on associated fractional Fourier transform and gyrator transform

<正>We present a novel method for realizing double-image encryption algorithm by combining the images in different transform domains.Two original images are encrypted into two interim images by fractional Fourier transform and gyrator transform,respectively.The two encrypted images can be obtained by means of the addition and subtraction of the two interim images.This is defined as a double-image sharing scheme,in which the original images are encrypted into two parts.The original images cannot be recovered only with any one of the two interim images.Numerical simulation experiments demonstrate the validity of the algorithm.     

Synthesis of one-dimensional graphene-encapsulated TiO2 nanofibers with enhanced lithium storage capacity for lithium-ion batteries

Journal of Solid State Electrochemistry - The one-dimensional graphene/TiO2 composite nanofibers with the unique microstructures have been successfully synthesized via an efficient method and...     

N-3烷基取代嘧啶及其衍生物的合成

在室温条件下,经过三步反应,合成了一系列N-3烷基取代的嘧啶类化合物.该方法具有条件温和、操作简便、反应时间短、产率高等特点.目标产物经过了1HNMR,13C NMR和MS确证表征.     

Light absorption distribution of prostate tissue irradiated by diffusing light source

Determination of light absorption distribution in the prostate tissue irradiated by diffusing light source is important for the treatment planning.In this paper,a three-dimensional(3D)optical model of human prostate is developed,and the light absorption distribution in the prostate tissue is estimated by Monte Carlo simulation method.Light distribution patterns including 3D distributions in the tissue model irradiated by two diffusing light sources are obtained and compared.Also,the impacts of length and energy of cylinder diffusing light source on the irradiance volume are demonstrated.Those results will be significant for the nondestructive qualitative assessments of photodosimetry in biomedical phototherapy.     

SDN/NFV技术在宽带IP城域网中的应用

针对传统宽带IP城域网面临的挑战和问题,基于软件定义和虚拟化等技术,文章提出宽带IP城域网络需要从简单的连接型网络向智能的功能型网络演进的思路和架构,并给出新形势下的应用场景,从而满足其智能化运营的发展需求。