基于WiMAX的IPTV应用分析

随着WIMAX网络及通信技术的发展,人们对IPTV在WIMAX网络中的应用需求迅速增加。本文介绍了IPTV技术的工作原理和基本特点和它对接入网络的要求,分析基于WIMAX技术的IPTV网络的应用前景。     

浅议联通业务应用与网络发展——联通IPTV业务解决方案与业务前景展望

本文简单介绍了IPTV业务,结合联通现有网络状况,制定了IPTV业务解决方案,规划了IPTV模块化结构体系;并通过对业务运营、市场行情等分析,对其发展前景进行了展望。     

IPTV业务发展策略思考

IPTV业务是当前非常看好的业务,但由于IPTV本身就是融合技术,涉及广电、通信等多个部门,所以从一出现就受到政策、技术和市场等多个方面的困扰,步履维艰。但是在IPTV从业人员的努力下,不断克服多方面阻力,撑起了属于IPTV的一片天地,而且随着业务发展模式与策略也渐渐明朗,IPTV大有星火燎原之势。本文首先介绍IPTV的系统架构及业务种类,分析现有业务运营模式,提出IPTV的发展策略。     

中国IPTV标准研究确定七大重点

IPTV业务正在不同国家,以不同形式迅速发展着。由于IPTV技术现阶段的多样化和建设大规模单一网络的需要,促使IPTV的标准化成为普遍受关注的热点;因此国际上已有多个标准化组织开展了相关的研究或着手研究;国内通信行业成立了IPTV特别任务组正在开展     

宽带IP网络向广电行业强势进军:IPTV技术的应用

随着网络技术的发展,IP宽带网路的应用已经普及化.电信运营商依靠传统的业务方式,难以满足其业务拓展的需要.IPTV作为一种全新的交互式网路电视技术,具有很大的潜力,已经开始在广电行业广泛应用.本文首先介绍了IPTV的概念及其系统架构,随后介绍了IPTV应用所采用的技术,最后论述了它在中国的应用状况.     

浅谈多元化计算机网络基础教学的应用

随着知识经济的到来,计算机网络技术在经济建设中扮演的角色将更为重要。优秀的计算机网络人才与先进的教学模式有着重要关系。本文分析了目前计算机网络基础教学的不足,提出了多元化教学模式的理念,力求用课堂教学、试验教学、自主学习等多个方法对计算机网络基础教学进行改革。     

数字电视与IPTV的分析与比较

数字电视和IPTV都是近几年快速发展起来的媒体产业,给我们日益提高的文化需求,在高质量和快捷性等方面提供了更多的选择,本文对数字电视和IPTV的技术特点和发展前景等方面做了粗浅的阐述。     

PON技术在光接入网的应用

无源光网络(PON)技术因其具有距离长、成本低、分配灵活、形似多样等特点被广泛的应用于光接入网中,下文中笔者将结合自己的工作经验,对不同光接入网中的PON技术的应用模式进行分析,并根据实际用户群对PON技术的应用进行了探讨,旨在论证PON技术是一种更加适合FTTH、IPTV以及三网合一的光网接入技术,诸多不足,还望批评指正。     

浅谈广电IPTV技术的应用与发展

本文结合当前PVT技术发展的实际情况,对广电应用IPTV技术的形式进行分析,并提出广电刚技术的未来发展趋势。     

IP组播技术及在新疆油田的应用

简要介绍组播概念及其应用场景,组播的转发技术,并说明组播技术在网络中的组网模式并以IPTV组播在新疆局域网中应用做举例说明。     

一种支持范围查询的P2P动态负载平衡算法

为支持连续数据按范围分段存放的P2P系统的动态负载平衡,使用了局部负载平衡算法和基于负载目录的负载平衡算法相结合的方法:局部负载平衡算法使负载交换只在邻居节点间进行,保证了相邻节点的负载始终处于平衡状态;基于负载目录的负载平衡算法使用负载目录克服了负载聚集时对节点进行均匀随机采样困难的问题,负载交换在负载目录中的所有节点中进行,使得系统能够以很高的概率满足全局负载平衡条件.算法分析和实验结果表明,这种方法可以取得较好的动态负载平衡效果.     

局域网环境下Peer-to-Peer应用的识别与监测

针对现有基于传输层特征的P2P识别方法的不足,分析了局域网环境下主流P2P应用的客户端口连接数、失败连接数、TCP/UDP服务端口连接数、所连接的远端IP数与远端端口数等传输层连接特征,根据P2P应用与普通Intemet应用在这些连接特征上的显著差异,提出了一种适用于局域网环境的实时P2P主机识别算法,并以该算法为核心,设计和实现了实时P2P应用监测系统traffMon.在实际网络环境中对traffMon系统进行了测试,结果表明,该系统能够对运行了主流P2P应用的计算机进行实时识别,并能够统计出对应主机的各类连接数、平均传输速率、P2P应用的服务端口号等信息,以作为局域网网络管理的依据.     

Mathematical Model Validation of Search Protocols in MP2P Networks

Broadcasting is a basic technique in Mobile ad-hoc network (MANET), and it refers to sending a packet from one node to every other node within the transmission range. Flooding is a type of broadcast where the received packet is retransmitted once by every node. The naive flooding technique, floods the network with query messages, while the random walk technique operates by contacting the subsets of every node’s neighbors at each step, thereby restricting the search space. One of the key challenges in an ad-hoc network is the resource or content discovery problem which is about locating the queried resource. Many earlier works have mainly focused on the simulation-based analysis of flooding, and its variants under a wired network. Although, there have been some empirical studies in peer-to-peer (P2P) networks, the analytical results are still lacking, especially in the context of P2P systems running over MANET. In this paper, we describe how P2P resource discovery protocols perform badly over MANETs. To address the limitations, we propose a new protocol named ABRW (Address Broadcast Random Walk), which is a lightweight search approach, designed considering the underlay topology aimed to better suit the unstructured architecture. We provide the mathematical model, measuring the performance of our proposed search scheme with different widely popular benchmarked search techniques. Further, we also derive three relevant search performance metrics, i.e., mean no. of steps needed to find a resource, the probability of finding a resource, and the mean no. of message overhead. We validated the analytical expressions through simulations. The simulation results closely matched with our analytical model, justifying our findings. Our proposed search algorithm under such highly dynamic self-evolving networks performed better, as it reduced the search latency, decreased the overall message overhead, and still equally had a good success rate.     

Preparing construction supply chains for blockchain technology: An investigation of its potential and future directions

Blockchain, a peer-to-peer, controlled, distributed database structure, has the potential to profoundly affect current business transactions in the construction industry through smart contracts, cryptocurrencies, and reliable asset tracking. The construction industry is often criticized for being slow in embracing emerging techno-logies and not effectively diffusing them through its supply chains. Often, the extensive fragmentation, traditional procurement structures, destructive competition, lack of collaboration and transparency, low-profit margins, and human resources are shown as the main culprits for this. As blockchain technology makes its presence felt strongly in many other industries like finance and banking, this study investigates the preparation of construction supply chains for blockchain technology through an explorative analysis. Empirical data for the study were collected through semi-structured interviews with 17 subject experts. Alongside presenting a strengths, weaknesses, opportunities, and threats analysis (SWOT), the study exhibits the requirements for and steps toward a construction supply structure facilitated by blockchain technology.     

纳米级润滑与表面改性研究

纳米技术在过去的几年里取得了巨大的进展．关注其两个主要方面：纳米级的薄膜润滑与纳米表面改性研究．薄膜润滑(thin film lubrication，TFL)的研究进展包括薄膜润滑测试技术、薄膜润滑的膜厚-工况相关特性、机理探索以及数学计算预测模型等方面．介绍了降低极尖沉降(pole-tip-recession，PTR)的技术，使用含有氮磷的环状化合物——X-1P来提高润滑剂的热稳定性的方法，以及使用纳米粒子的化学机械抛光技术．这些研究成果揭示了现代纳米技术的一些重要特征．     

Enhancing Blockchain Security Using Ripple Consensus Algorithm

In the development of technology in various fields like big data analysis, data mining, big data, cloud computing, and blockchain technology, security become more constrained. Blockchain is used in providing security by encrypting the sharing of information. Blockchain is applied in the peer-to-peer (P2P) network and it has a decentralized ledger. Providing security against unauthorized breaches in the distributed network is required. To detect unauthorized breaches, there are numerous techniques were developed and those techniques are inefficient and have poor data integrity. Hence, a novel technique needs to be implemented to tackle the new breaches in the distributed network. This paper, proposed a hybrid technique of two fish with a ripple consensus algorithm (TF-RC). To improve the detection time and security, this paper uses efficient transmission of data in the distributed network. The experimental analysis of TF-RC by using the metric measures of performance in terms of latency, throughput, energy efficiency and it produced better performance.     

基于P2P的空间信息服务组合执行引擎

提出了一种基于P2P的空间信息服务组合执行引擎设计.引擎使用空间信息服务团体模型和服务质量参数,在P2P网络中动态地选择最佳的执行引擎,通过P2P的消息和通信机制进行协作,完成复杂的空间信息服务组合执行任务.P2P的执行机制避免了集中式执行引擎带来的网络拥塞和单点失效问题,提高了空间信息服务组合的可靠性和可用性.     

Performance of locality-aware topologies for peer-to-peer live streaming

This study is concerned with the effect of overlay network topology on the performance of live streaming peer-to-peer systems. The study focuses on the evaluation of topologies which are aware of the delays experienced between different peers on the network. Metrics are defined which assess the topologies in terms of delay, bandwidth usage and resilience to peer drop-out. Several topology creation algorithms are tested and the metrics are measured in a simple simulation testbed. This gives an assessment of the type of gains, which might be expected from locality awareness in peer-to-peer networks.     

SENORA: A P2P Service-Oriented Framework for Collaborative Multirobot Sensor Networks

SENORA is an open hardware and software architecture for the cooperative coordination of multiple heterogeneous mobile robots operating in a common environment. It is designed to meet the stringent requirements of modern loosely coupled multirobot architectures, such as flexibility, reliability, and fault tolerance. As such, the proposed architecture enables the robots to cope with the ubiquitous presence of various types of uncertainties in their operating environments. SENORA is a fully autonomous and scalable sensory-based peer-to-peer (P2P) framework. It also offers a real-time inter-robot communication protocol and it is based on the state-of-the-art P2P technology, which is specifically designed to satisfy the requirements of physical sensory data publishing and fusion. This architecture is implemented and evaluated on a team of indoor mobile robots. The test results manifest the architecture's distinguished features and capabilities     

Information technology and Gen Z: The role of teachers,the internet,and technology in the education of young people

Technological progress has influenced the way we acquire knowledge and learn. On the other hand, the Internet provides fast access to information technology in different fields and thus, improves efficiency and saves time. The importance of online technology is especially emphasized in new methods for learning and education. This is particularly important among Generation Z (“Gen Z″), which derives knowledge from the Internet and is focused on a quick search of information. The aim of this paper is to determine how technology and the Internet affect the acquisition of knowledge by Generation Z, and which forms of knowledge acquisition this generation prefers. In our paper, the problem concerns various forms of learning and acquiring knowledge. Research was conducted among 498 young people actively using an online peer-to-peer knowledge-sharing community. The results of ANOVA analysis showed the respondents being more partial towards learning via mobile applications and video content over the traditional form. It also discovered that the students tended to emulate their teachers who integrated modern technologies into their curriculum and used it outside classroom hours for learning. The results of this research make several important theoretical contributions to the gap in knowledge acquisition by Gen Z, and provide several important practical recommendations for educators.