搜索结果: 121-135 共查到“知识库 通信网络技术”相关记录1343条 . 查询时间(1.753 秒)
基于交换式以太网的列车通信网络建模与性能分析
交换式以太网 确定与随机Petri网
2015/12/21
为了满足未来大容量、高速率、硬实时性的信息传输需求，将交换式以太网技术引入列车通信网络（TCN,
traincommunicationnetwork）。针对不同优先级消息，根据其通信调度方式对传输过程建立了TCN的确定与随机
Petri网(DSPN,determinedandstochasticPetrinets)模型，比较了交换机不同调度算法对时延的影响，并分析了消息
数目和产生周期，以及...
基于差分隐私的权重社会网络隐私保护
差分隐私 查询模型 Laplace分布
2015/12/21
针对权重社会网络发布隐私保护中的弱保护问题，提出一种基于差分隐私模型的随机扰动方法可实现边
及边权重的强保护。设计了满足差分隐私的查询模型-WSQuery，WSQuery模型可捕获权重社会网络的结构，以
有序三元组序列作为查询结果集；依据WSQuery模型设计了满足差分隐私的算法-WSPA，WSPA算法将查询结
果集映射为一个实数向量，通过在向量中注入Laplace噪音实现隐私保护；针对WS...
复杂网络环境下基于推荐链分类的动态信任模型
推荐链分类 信任模型 信任传播 信任聚合
2015/12/21
针对网络环境中复杂的推荐信息处理问题，提出了一种基于推荐链分类的信任模型。该分类方法基于节点间
的诚实属性，在实际经验数据的基础之上能选择出有效的推荐链。针对推荐信息的传播使用了以信息增益为基础的参
数，使推荐信息更精准，考虑了时间的影响并且能把交互能力与诚实属性清楚地区分开。在最终的直接信任与推荐信
息的聚合计算过程中采用了信息论中熵的概念，摆脱了以往主观设定参数的模糊性。模型中主要的聚合...
针对传感器网络数据处理中的隐私保护需求，提出了新的分布式机制。构造了隐私向量，并设计了低能
耗的隐私向量生成方法及使用方法，从而可有效实现求和、求最值及压缩等各类处理中的数据隐私保护。提出了
种子分发算法，保证了隐私向量的安全动态生成。理论分析和仿真实验表明，与已有同类机制相比，新机制不仅
能更好地抵御节点俘获攻击，具有更高的隐私保护有效性，且更为能量有效。
Banning Foreign Pharmacies from Sponsored Search: The Online Consumer Response
Online Prescription Drug Internet Search Foreign Pharmacy Drug Safety
2015/9/21
Increased competition from the Internet has raised concerns for the quality of online prescription drugs. Given the illegality of importing unapproved prescription drugs into the U.S. and the
pressur...
WEB-BASED NETWORK SAMPLING: EFFICIENCY AND EFFICACY OF RESPONDENT-DRIVEN SAMPLING FOR ONLINE RESEARCH
EFFICIENCY ONLINE RESEARCH
2015/9/11
WEB-BASED NETWORK SAMPLING: EFFICIENCY AND EFFICACY OF RESPONDENT-DRIVEN SAMPLING FOR ONLINE RESEARCH.
Adjustment and transformation strategies of ItalPoS Permanent GNSS Network
GNSS Permanent Network Globk Adjustment Strategies Boucher Altamimi transformation
2015/8/28
A private network of 133 Global Navigation Satellite Systems (GNSS) permanent sites, named ItalPoS (Italian Positioning Service) and uniformly covering the entire Italian territory, was established in...
Counter Braids: A Novel Counter Architecture for Per-Flow Measurement
Statistics Counters Network Measurement Message Pass- ing Algorithms
2015/8/21
Fine-grained network measurement requires routers and switches to update large arrays of counters at very high link speed (e.g. 40 Gbps). A naive algorithm needs an infeasible amount of SRAM to store ...
The spread of innovations in social networks
Network structure the epidemic model of coordination game
2015/8/20
Which network structures favor the rapid spread of new ideas, behaviors, or technologies? This question has been studied extensively using epidemic models. Here we consider a complementary point of vi...
Development of Underwater Acoustic Modems and Networks
Underwater Acoustic Modems Networks
2015/8/19
Recent developments in underwater acoustic communication enable real-time contact with underwater sensors, vehicles, and other instruments, offering novel ocean observational capabilities that may cha...
An Efficient Feedback Coding Scheme With Low Error Probability for Discrete Memoryless Channels
Feedback discrete memoryless channel error exponent
2015/8/17
Existing fixed-length feedback communication schemes are either specialized to particular channels (Schalkwijk–Kailath, Horstein), or apply to general channels but either have high coding comple...
Optimized Noisy Network Coding for Gaussian Relay Networks
Optimized Noisy Network Gaussian Relay Networks
2015/8/17
In this paper, we provide an improved lower bound on the rate achieved by noisy network coding in arbitrary Gaussian relay networks, whose gap to the cutset upper bound depends on the network not only...
Interference Networks With Point-to-Point Codes
Ad hoc network coverage interference joint decoding network information theory performance evaluation
2015/8/17
The paper establishes the capacity region of the Gaussian interference channel with many transmitter-receiver pairs constrained to use point-to-point codes.
Noisy network coding unifies network coding by Ahlswede, Cai, Li, and Yeung for noiseless networks and compress–forward by Cover and El Gamal for noisy relay channels.
Noisy Network Coding
Noisy Network
2015/8/17
A noisy network coding scheme for sending multiple sources over a general noisy network is presented. For multi-source multicast networks, the scheme naturally extends both network coding over noisele...