MPLS在BGP网络中的实现

通过实验将MPLS技术应用在BGP网络中,证明了它能够区别于传统技术解决BGP网络的路由黑洞问题。从而验证MPLS技术对于BGP网络的分配标签的机制,对于现代Intemet网络有着重大意义。     

基于MPLS/BGP电子政务网L2VPN应用与实现

 各厅局通过ATM,F/R,VPDN,Ethernet等方式接入电子政务网,通过分析比较各种基于MPLS的L2VPN技术,构建基于MPLS/BGP的L2VPN,分析改进的Kompella方式的实现过程和原理,实现Kompella和Martini方式的互联互通问题。     

Traffic Engineering and Traffic Matrix in IP Backbone Network Based on MPLS

On current network actuality and development trend, it is necessary to put traffic engineering in practice in IP backbone network on IP/MPLS. The essential demand in actualizing traffic engineering is traffic matrix measurement. After analyzing the defect of current measurement method, traffic engineering model and traffic matrix on LSP in IP backbone network based on MPLS, or relevant routing algorithm are researched. The merit of the traffic matrix's measurement method is that implement of measurement is only located in the edge node; therefore, network resource's cost is lower and it offers a new train of thoughts for resolving the flaw of current main measurement methods, moreover, and condition for actualizing traffic engineering.     

基于MPLS下的流量工程及技术

本文就基于MPLS下的流量工程在网络中的应用进行了研究。对MPLS实施高效可靠的网络运作策略的性能做了分析，这些策略可以用来优化网络资源利用，增强面向流量的网络性能。     

不同近红外光谱仪在茶叶品质检测中的应用研究

分别应用NIRSystems 6500和InfraXact Lab两种不同型号近红外光谱仪对茶叶中茶多酚和咖啡碱含量进行定标建模,确定了在改进偏最小二乘法定标技术下的最优光谱数据预处理方式,分别建立了茶多酚和咖啡碱的优化定标模型.NIRSystems 6500和InfraXact Lab两种型号近红外光谱仪所建立茶多酚的最优定标模型目标函数f值分别为96.07%和95.96%,咖啡碱的最优模型目标函数f值分别为95.32%和91.47%,定标效果良好.利用验证集样本对模型进行了检验,茶多酚和咖啡碱的预测相对分析误差(RPD)均大于3.结果表明,两种仪器所得到的模型定标效果均良好,预测精度高,都可用于实际检测.NIRSystems 6500型近红外光谱仪的定标效果和稳定性优于InfraXact Lab型近红外光谱仪.     

基于MPLS的分布式网络入侵检测方法

MPLS 网络结构具有很好的通信和分布式特征,是分布式网络入侵检测的理想架构。针对分布式网络入侵检测系统体系结构中的通信部件,将 MPLS 技术和分布式网络入侵检测结合在一起,探讨了基于 MPLS 的分布式网络入侵检测的工作过程。采用 MPLS 技术实现分布式入侵检测是有效的,解决了传统的分布式网络入侵检测的通信及部件的分布问题,与此同时还保留了传统的分布式网络入侵检测的独立性、集中性和分布性这些优势。     

Prediction of yield and the contribution of legumes in legume-grass mixtures using field spectrometry

Productivity and botanical composition of legume-grass swards in rotation systems are important factors for successful arable farming in both organic and conventional farming systems. As these attributes vary considerably within a field, a non-destructive method of detection while doing other tasks would facilitate more targeted management of crops and nutrients in the soil–plant–animal system. Two pot experiments were conducted to examine the potential of field spectroscopy to assess total biomass and the proportions of legume, using binary mixtures and pure swards of grass and legumes. The spectral reflectance of swards was measured under artificial light conditions at a sward age ranging from 21 to 70 days. Total biomass was determined by modified partial least squares (MPLS) regression, stepwise multiple linear regression (SMLR) and the vegetation indices (VIs) simple ratio (SR), normalized difference vegetation index (NDVI), enhanced vegetation index (EVI) and red edge position (REP). Modified partial least squares and SMLR gave the largest R ² values ranging from 0.85 to 0.99. Total biomass prediction by VIs resulted in R ² values of 0.87–0.90 for swards with large leaf to stem ratios; the greatest accuracy was for EVI. For more mature and open swards VI-based detection of biomass was not possible. The contribution of legumes to the sward could be determined at a constant biomass level by the VIs, but this was not possible when the level of biomass varied.     

MPLS流量工程最小干涉的负载均衡路由算法优化研究

基于MPLS流量工程,对一种基于最小干涉的负载均衡算法提出改进、优化方案。考虑最大流贡献对关键链路选取的影响,以MIRA算法为基础解决了MPLS网络中所有入口/出口对之间的业务流相互干扰的问题,为后续业务流路由预留了必要的关键链路,并把网络负载控制在一定范围。