【摘 要】
：
Nowadays,with the advancement of new technologies such as the Internet of Things,new ap-plications and intelligent networks,the use of wire-less sensor network increased considerably.They are prone to a variety of attacks.Thus,network secu-rity is of utmo
【机 构】
：
Department Of Computer Engineering,Arak Branch,Islamic Azad University,Arak 38361-1-9131,Iran
论文部分内容阅读
Nowadays,with the advancement of new technologies such as the Internet of Things,new ap-plications and intelligent networks,the use of wire-less sensor network increased considerably.They are prone to a variety of attacks.Thus,network secu-rity is of utmost importance to researchers.In the past,methods such as cryptography,authentication and hash function were used to create security in this type of network.However,due to the limitations of this type of network,trust-based methods are used today.Finding a secure route for transferring data among available routes greatly increases security in this network.In this paper,we present aTrust-based Routing Optimization using Multi-Ant Colonies (MA-CRAT) scheme which is based on the improvement of the ant meta-heuristic algorithm and an improved method for trust assessment which is presented.The simulation results illustrate that MACRAT is more ef-ficient than existing routing protocols.The results show that MACRAT improved by 10％ in black hole detection compared to ESRT protocol and by 4％ com-pared to M-CSO protocol,the packet loss rate in MA-CRAT improved by 30.14％ compared to ESRT proto-col and 6％ compared to M-CSO protocol.
其他文献
探究睡莲多酚超声提取的最佳工艺条件,并在进一步纯化基础上,采用烘箱法评价其抗油脂氧化性能.以睡莲多酚提取率为指标,通过考察乙醇体积分数、料液比、超声温度、超声时间对提取的影响,结合正交设计实验优化得出最佳提取工艺:乙醇体积分数50％,料液比1∶ 50 g/mL,超声温度60℃,超声时间40 min,超声功率90 W,在此条件下睡莲多酚提取率达14.0％.通过大孔树脂聚酰胺联用方法获得了纯化后的睡莲多酚,其多酚质量分数为(79.29±0.75)％.抗油脂氧化实验结果表明:睡莲多酚对葵花籽油、菜籽油和猪油的过
通过对在-20、4、20、50℃下分别贮藏40、90、120、150、180d的干核桃仁色、抗氧化成分、脂肪酸、氨基酸含量进行测定分析,探索贮藏温度和时间对干核桃仁色和营养成分的影响,为干核桃贮藏的品质保全、精深加工提供科学依据.结果表明大部分品质成分受温度和时间影响效应明显,其中温度对核桃仁色、贮藏时间对抗氧化成分的影响效应最为显著.温度和时间对大部分品质成分的交互增强效应显著,但对仁色无交互效应,且低温与短期贮藏有利于干核桃仁色的保全,尤其是直接销售的干核桃更适于4℃的贮藏以保全仁色和其他营养品质;而
为实现泰来绿豆产地溯源研究,筛选适宜算法与样品形态对模型精度的影响与应用,实验采用傅里叶变换近红外漫反射光谱技术对来自泰来绿豆和非泰来绿豆共计253份样品进行产地溯源研究.结果表明,采用绿豆粉末状态建模效果要优于籽粒状态,对绿豆粉末鉴别研究中,运用因子化法建模的检测精度要优于标准算法,该法结合一阶导数+5点平滑的预处理方式建立的定性分析模型及采用Ward\'s algorithm聚类算法结合二阶导数+SNV+5点平滑的预处理方式建立的聚类分析模型分别对粉末状泰来绿豆的正确鉴别率为96.15％和92.3
为建立基于线粒体COⅠ和COⅡ基因序列的米象和玉米象的分子鉴定方法,对采自全国6个地理种群的米象和2个地理种群的玉米象,PCR扩增试虫线粒体COⅠ和COⅡ基因,将获得的基因序列在Gen-Bank 中进行BLAST比对,分析基因序列相似性,分别计算基于COⅠ和COⅡ基因序列的遗传距离,并构建系统发育树.分析结果表明,米象COⅠ基因的种内相似度在98.17％以上,玉米象COⅠ基因的种内相似度100％,米象和玉米象COⅠ基因的种间相似度为85.84％～86.92％;米象COⅡ基因的种内相似度在98.37％以上,
RNAi具有防治效果好、靶向性强等优点,因此被认为是下一代的害虫防控技术.近年,美国环境署(EPA)和食药局(FDA)先后批准了两款基于该技术的害虫防治及作物改良产品上市,标志着该技术在粮食领域的商品化开端.目前RNAi在多种储粮害虫中的可行性已经得到证实,但是该技术还存在一些问题,例如不同的害虫种类、dsRNA递送方式和分子设计差异都会影响RNAi防治效果.因此,本文系统性概述了 RNAi技术在储粮害虫防治领域的研究及应用现状,并首次对RNAi技术在储粮害虫防控中的可行性、效率影响因素和增效方法进行了较
淀粉与蛋白质之间的相互作用对谷物制品的品质与营养等具有重要影响.本文概述了淀粉与蛋白质相互作用的类型及影响因素,以及谷物中淀粉与蛋白质相互作用对淀粉糊化、消化、流变学特性的影响,综述了光谱学方法和结构解析技术等相互作用的研究方法.通过探索淀粉-蛋白质的相互作用规律以期提高人们对谷物多组分结构和性质的认识,从而为谷物深加工提供参考,促进新型谷物制品的研发.
我国是稻谷的生产加工大国,稻谷加工过程中产生了大量的副产物——米糠,其营养价值非常丰富,加工潜力巨大.目前我国只有10％～15％的米糠进行了深层次开发利用,这与一些发达国家尤其是与日本相比,在加工技术先进度、综合利用度以及经济效益方面都差距甚大.本文通过整理,总结了当前米糠主要生物活性物质及其有效的提取方法,生理功能特性,以及在食品、化妆品及医药领域中的应用情况,以期为我国米糠高附加值利用提供研究参考.
Mobile edge computing (MEC) is an emerging technolohgy that extends cloud computing to the edge of a network.MEC has been applied to a variety of services.Specially,MEC can help to re-duce network delay and improve the service quality of recommendation sy
Pilot pattern has a significant effect on the performance of channel estimation based on com-pressed sensing.However,because of the influence of the number of subcarriers and pilots,the complexity of the enumeration method is computationally impracti-cal.
Efficient response speed and information processing speed are among the characteristics of mo-bile edge computing (MEC).However,MEC easily causes information leakage and loss problems because it requires frequent data exchange.This work pro-poses an anony