Spectral resource defragmentation based on PCE in flexible bandwidth optical networks

The granularity of the flexible bandwidth optical network is the spectral slots,which is much smaller than that of the wavelength switch optical network.For the dynamic clients’ connections setup and tear down processes,it will give rise to fragmentation of spectral resources.It is the decline in the probability of finding sufficient contiguous spectrum for new connections that result in the fragmentation of spectral resource.To be more specific,these spectra may be unavailable and waste.In this case,the severe waste of the spectrum will lead to low efficiency in spectral utilization and will not adapt to large capacity requirements of transmission in the future.Because path computation element(PCE) framework has the characteristics of the central disposal and deployment of the spectrum resource,we construct the spectral resource allocation scenario based on PCE framework in the flexible bandwidth optical network to use spectrum resource effectively.Based on the principle of the generation of the fragmentation,we put forward a spectrum resource defragmentation algorithm to consolidate the available spectrum for clients’ connections.The simulation results indicate that this algorithm is able to reduce fragmentation of network,improve the continuity of spectral resource,reduce the blocking rate of services in the network and improve the spectral efficiency significantly.     

两种WCDMA无线利用率浅析及高效小区判定方法

以网络极限承载能力为突破口,对两种无线资源利用率算法进行浅析,研究在网络极限能力下的实际运行效率,并将两种算法联合分析,通过两种建模,给出判定高效小区的初步方法。     

关闭煤矿资源GIS综合管理系统的构建研究

随着我国绿色、低碳理念的倡导与践行,作为高碳的煤炭行业发展将会受到较大的影响.同时,我国对矿山开采活动进行了严格的政策管控,关闭的煤矿越来越多,如何对关闭煤矿资源进行管理和再次开发利用成为一个亟需解决的问题.为实现对关闭煤矿资源的高效管理,本文充分利用关闭煤矿的研究成果和各种资料数据,为矿业集团对关闭煤矿精准开发利用提...     

西部城乡中学体育教育资源配置的系统优化

本文对西部城乡中学体育教育资源的配置情况进行了分析,并对其配置进行了优化分析。体育资源配置的优化分析采用基于B/S结构的资源配置系统,并对系统进行了设计,对TCP/IP协议这项技术进行相关分析。     

Cross‐Layer Resource Allocation Scheme for WLANs with Multipacket Reception

Tailored for wireless local area networks, the present paper proposes a cross‐layer resource allocation scheme for multiple‐input multiple‐output orthogonal frequency‐division multiplexing systems. Our cross‐layer resource allocation scheme consists of three stages. Firstly, the condition of sharing the subchannel by more than one user is studied. Secondly, the subchannel allocation policy which depends on the data packets’ lengths and the admissible combination of users per subchannel is proposed. Finally, the bits and corresponding power are allocated to users based on a greedy algorithm and the data packets’ lengths. The analysis and simulation results demonstrate that our proposed scheme not only achieves significant improvement in system throughput and average packet delay compared with conventional schemes but also has low computational complexity.     

三网融合与基于协作的无线技术

无线协作技术,特别是立体化的协作架构,有助于广播网和无线通信网更紧密地协同。文章认为无线协作技术提供初级回程通道。它可以通过统一的资源管理,互相配合,提供网络级自动重发请求（ARQ）以及面向用户与业务特性的特色传输。无线协作技术还通过协作中继,提升覆盖质量,实现更紧密的动态频谱共享。紧密地协作将为三网融合提供更有效的协作机制,为用户带来新的业务体验,更好地满足新业务和用户需求的多样化发展。     

面向战术通信网的传送控制技术研究

随着战术通信的不断发展和多媒体业务的日益普及,在战术通信网上提供业务传输QoS保障的研究逐渐成为一个热点。在研究和分析战术通信网信道带宽有限、信息传输速率不高和节点移动性等特点后,为解决在战术通信网中如何实现端到端业务传输QoS保障,合理有效利用无线网络资源,提高数据传输性能等问题,提出了面向战术通信网的战场信息传送控制技术,在此基础上设计了传送控制系统。     

利用基本RS触发器实现双CPU系统共享硬件资源

阐述了巧妙地利用基本RS触发器输入信号由违反约束条件变化成符合约束条件的瞬间，触发器的两个输出立即会变化成稳定的互斥状态的特点，可开发出多个输入信号竞争时只有一个有效状态输出的逻辑电路；并以双CPU系统共享随机存储器原理为例，介绍利用基本RS触发器解决双方访问硬件时的冲突问题，对其中的核心硬件电路工作原理进行了剖析。     

远程预警相控阵雷达资源调度仿真研究

在分析远程预警雷达工作方式和资源调度设计原则的基础上，提出了一种仿真实现自适应资源调度的方法，并给出了仿真实现的详细流程。该方法能够根据雷达事件的优先级、驻留长度以及期望发射时间合理的安排雷达事件，仿真结果验证了该方法的有效性。     

一种网络学习资源的检索模型研究

首先介绍了四种网络学习模式,并探讨了这四种模式中的最流行的网络学习模式-个别化的网络学习模式的资源特征.然后对个别化的网络学习模式,构建了一种基于语义的检索模型,并对模型中各组成部分的主要作用和模型的检索过程进行了阐述.最后通过实验的验证,证明了模型的合理性和有效性.