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中国科学院声学研究所专利：一种CCN/NDN内容注册、内容位置解析和内容路由的系统及方法
基于内容流行度的移动ＣＣＮ缓存策略研究
内容中心网络 缓存 用户移动性 内容流行度
2018/6/11
近年来，为了适应互联网应用由发送者驱动的端到端通信模式向接收者驱动的海量内容获取模式的转变，
并从网络体系架构层面提供对可扩展和高效内容获取的原生支持，研究界近年来提出以内容为中心的新型网络
（ｃｏｎｔｅｎｔｃｅｎｔｒｉｃｎｅｔｗｏｒｋｉｎｇ，ＣＣＮ）体系架构，它能够高效地支持未来互联网上的内容分发。随着移动用户数量的不
断增加，未来移动用户也将访问 ＣＣＮ网络，针对内容中心网络中的用户移...
CCN中基于节点状态模型的缓存污染攻击检测算法
内容中心网络 缓存污染攻击 缓存状态模型 攻击检测
2016/12/3
针对内容中心网络中的缓存污染攻击问题，以污染内容数量、分布状态和攻击强度3个参数对缓存污染攻击进行定量描述和分析，建立了攻击下的节点缓存状态模型。通过分析节点关键参数的变化，提出了基于节点状态模型的攻击检测原则，并分别以单位时间缓存替换率和请求达到率为观测参数进行算法实例化设计。仿真结果与性能分析表明，所提检测算法在应对分散式攻击与集中式攻击时，可以取得良好的检测性能。
基于层次划分的CCN网络缓存存储策略
内容中心网络 缓存存储策略 层次划分 协作存储
2016/5/11
针对如何提高内容中心网络网内缓存性能的问题，提出一种基于层次划分的轻量协作的缓存存储策略。该策略通过Interest分组、Data分组以及路由器本地PIT表三者的协作把内容划分为多种优先级层级，使不同内容缓存在沿途的不同路由器。实验证明该策略可以有效地减少访问跳数，提高平均缓存命中率，降低服务器负载。
Adaptive method of lines for multi-component aerosol condensational growth and CCN activation
Adaptive method of lines multicomponent aerosol condensational growth CCN activation
2014/12/9
The process of formation of cloud droplets on an ensemble of aerosol particles is modelled by numerous investigators using the method of lines (MOL). The method involves discretisation of the aerosol ...
CCN中基于业务类型的多样化内容分发机制
内容中心网络 区分服务 缓存策略 业务类型
2016/12/29
针对内容中心网络(Content Centric Networking,CCN)如何提供差异化的业务需求服务的问题,采用区分服务的思想,从内容传输和缓存决策的角度出发,提出了一种基于业务类型的多样化内容分发机制.该机制依据不同的业务请求特征,分别设计了持久推送、并行预测和逐包请求的数据分发模式,对应提出了透明转发、边缘概率缓存和渐进式推进的沿途存储策略,实现了内容传递对于业务类型的感知和匹配.仿真...
环北京春季大气气溶胶分布、来源及其与CCN转化关系的飞机探测
气溶胶 CCN 飞机观测 粒子谱
2013/8/19
利用2009年春季开展的“环北京云观测试验”(Beijing cloud experiment, BCE)观测的气溶胶和云凝结核(CCN)数据, 研究了试验期间大气气溶胶的分布、来源特征及其与云凝结核(CCN)的转化关系. 结果表明, 高浓度气溶胶基本分布在4500 m以下的区域, 量级可以达到103 个/cm3. 4500 m以上气溶胶呈显著下降趋势, 仅为101 个/cm3的量级; 气溶胶平均...
On average, airborne aerosol particles cool the Earth's surface directly by absorbing and scattering sunlight and indirectly by influencing cloud reflectivity, life time, thickness or extent. Here we ...
Hygroscopicity distribution concept for measurement data analysis and modeling of aerosol particle mixing state with regard to hygroscopic growth and CCN activation
Hygroscopicity distribution concept measurement data analysis aerosol particle mixing state hygroscopic growth CCN activation
2010/8/16
This paper presents a general concept and mathematical framework of particle hygroscopicity distribution for the analysis and modeling of aerosol hygroscopic growth and cloud condensation nucleus (CCN...
The contribution of anthropogenic aerosols to aerosol light-scattering and CCN activity in the California coastal zone
anthropogenic aerosols aerosol light-scattering CCN activity the California coastal zone
2010/8/16
Aircraft-based measurements of aerosol light-scattering coefficient, cloud condensation nuclei (CCN) measured directly or by proxy, and aerosol chemical composition are reported for three different ye...
The importance of aerosol mixing state and size-resolved composition on CCN concentration and the variation of the importance with atmospheric aging of aerosols
aerosol mixing state size-resolved composition CCN concentration atmospheric aerosols
2010/8/16
Aerosol microphysics, chemical composition, and CCN concentrations were measured at the T0 urban supersite in Mexico City during Megacity Initiative: Local and Global Research Observations (MILAGRO) i...
Empirical estimates of CCN from aerosol optical properties at four remote sites
Empirical estimates CCN aerosol optical properties four remote sites
2010/8/16
This study presents an empirical method to estimate the CCN concentration as a function of percent supersaturation. The aerosol optical properties, backscatter fraction and single scatter albedo, func...
Global distribution of the effective aerosol hygroscopicity parameter for CCN activation
Global distribution the effective aerosol hygroscopicity parameter CCN activation
2010/8/13
In this study we use the ECHAM/MESSy Atmospheric Chemistry (EMAC) model to simulate global fields of the effective hygroscopicity parameter κ which approximately describes the influence of chemical co...
CCN predictions using simplified assumptions of organic aerosol composition and mixing state: a synthesis from six different locations
CCN predictions organic aerosol composition a synthesis six different locations
2010/8/13
An accurate but simple quantification of the fraction of aerosol particles that can act as cloud condensation nuclei (CCN) is needed for implementation in large-scale models. Data on aerosol size dist...
Towards closing the gap between hygroscopic growth and CCN activation for secondary organic aerosols – Part 3: Influence of the chemical composition on the hygroscopic properties and volatile fractions of aerosols
hygroscopic growth CCN activation secondary organic aerosols the chemical composition the hygroscopic properties aerosols
2010/8/12
The influence of varying levels of water mixing ratio, r, during the formation of secondary organic aerosol (SOA) from the ozonolysis of α-pinene on the SOA hygroscopicity and volatility was investiga...