在广电HFC网络中使用CM实现VPN的接入

本文着重讨论了长期困扰广电的VPN接入方式单一的问题；针对目前使用的各种不同的CMTS，相应提出了使用CM接入VPN的解决方案；并就广电双向城域网内如何充分利用现有资源，高效、经济的实现VPN接入等问题，提出了相关的技术细节。需要着重提出的是，本文中所提到的VPN接入并不是使用CMTS的PE功能，而是仅仅将CMTS作为一种VPN流量透传的设备来应用。所有的VPN路由全部由上层的PE设备来处理，而CMTS中并没有VPN路由。     

A RECURSIVE 4SID FROM THE INPUT-OUTPUT POINT OF VIEW

In this paper, recursive algorithms of subspace state-space system identification (4SID) for multiple-input, multiple-output (MIMO), finite dimensional, linear time-invariant (FDLTI) systems are proposed. These algorithms are derived based on the Matrix Inversion Lemma. The investigation of our algorithms clarifies that a series of 4SID is the extension of the classical least square method to identification for multivariable systems, and also that our algorithms are the direct extension of the recursive least square algorithm to such ones. For PO-MOESP (the ordinary MOESP scheme with instrumental variables constructed from Past input and Output measurements), we show the mechanism of how the effect of the process and measurement noises is eliminated asymptotically by a projection related to the input and regressor matrices. “MOESP” is an abbreviation for “the MIMO output-error state-space model identification.”     

Glycoproteomic and Phenotypic Elucidation of B4GALNT2 Expression Variants in the SID Histo-Blood Group System

The Sd^a histo-blood group antigen (GalNAcβ1-4(NeuAcα2-3)Galβ-R) is implicated in various infections and constitutes a potential biomarker for colon cancer. Sd(a−) individuals (2–4% of Europeans) may produce anti-Sd^a, which can lead to incompatible blood transfusions, especially if donors with the high-expressing Sd(a++)/Cad phenotype are involved. We previously reported the association of B4GALNT2 mutations with Sd(a−), which established the SID blood-group system. The present study provides causal proof underpinning this correlation. Sd(a−) HEK293 cells were transfected with different B4GALNT2 constructs and evaluated by immunostaining and glycoproteomics. The predominant SID^null candidate allele with rs7224888:T>C (p.Cys406Arg) abolished Sd^a synthesis, while this antigen was detectable as N- or O-glycans on glycoproteins following transfection of wildtype B4GALNT2. Surprisingly, two rare missense variants, rs148441237:A>G and rs61743617:C>T, found in a Sd(a−) compound heterozygote, gave results similar to wildtype. To elucidate on whether Sd(a++)/Cad also depends on B4GALNT2 alterations, this gene was sequenced in five individuals. No Cad-specific changes were identified, but a detailed erythroid Cad glycoprotein profile was obtained, especially for glycophorin-A (GLPA) O-glycosylation, equilibrative nucleoside transporter 1 (S29A1) O-glycosylation, and band 3 anion transport protein (B3AT) N-glycosylation. In conclusion, the p.Cys406Arg β4GalNAc-T2 variant causes Sd^a-deficiency in humans, while the enigmatic Cad phenotype remains unresolved, albeit further characterized.     

基于支持向量机N4SID辨识模型的非线性预测控制

针对工业控制领域中非线性系统的模型辨识与预测控制问题,采用最小二乘支持向量机回归方法构造非线性函数,运用状态子空间（N4SID）模型辨识方法辨识非线性状态空间模型.在此基础上建立非线性预测控制器,利用拟牛顿算法进行非线性预测控制律的求解,从而实现了一种新的基于支持向量机N4SID辨识模型的非线性预测控制算法.仿真实验验证了该算法的有效性和可行性.     

基于N4SID子空间辨识的轧机系统性能改进分析

利用N4SID子空间辨识方法对南钢2800 mm中厚板精轧机系统的性能进行了分析。选取轧机的测量信号构成辨识对,利用子空间辨识方法,得到轧机在工作时的高阶动态数学模型。机架在0.63 Hz处有一振动频率,当轧辊旋转频率与该频率一致或接近时容易激发机架振动,对板形和设备正常运转影响较大。实际生产中,精轧机应避免在上述振动频率对应的转速范围36.0~39.0 r&;#8226;min-1内进行轧制,速度调整后板形得到很好控制,表明模型在轧机系统性能改进分析中是有效的。     

基于SID的IP承载网资源信息模型研究

针对电信网络运维支撑中的跨专业信息共享问题,参考SID建模方法,对IP承载网及其软交换接入网元进行分解抽象,建立了软交换服务器和媒体网关端到端关联的资源信息模型,提出了软交换接入资源调度和软交换端到端关联查询的服务模型,运用了抽象、组合、角色等设计模式,使模型能适应IP承载网结构和业务的持续演进。结合运营商的数据对模型进行系统实现,实现了MSS与MGW的端到端关联呈现,表明模型能有效支撑跨专业资源调度和告警关联分析。     

下一代实验室,更亮的OLED材料以及其它

在SID’04的展览会上，三分之一的内容与设备或材料供应商有关，故器件制造是该展览会上人们交谈的主题。     

好莱坞大片：2008显示周驾临洛杉矶

今年5月,当2008年显示周驾临洛杉矶时,这个世界娱乐之都为国际信息显示协会(Society for Information Display,SID)铺上红地毯。就像好莱坞大片,显示周同样不能错过。以下的介绍可使您先睹为快。     

2007显示周:系统和部件

从显示器的背光源到屏幕保护玻璃,以及处于二者之间的显示系统和器件部分的发展状况,是2007年显示周上重要的展出内容,本文即是这次展览的概述。     

电信运营规划研究

着眼于电信运营应用程序的开发和架构,分析了当前电信应用系统在实施方面的现状和难题,深刻分析和探讨了电信运营规划(TAM)的内涵和作用,阐明了TAM在电信应用程序组织和开发过程中的重要性,对基于NGOSS框架、实际部署和实施的电信运营和商务支撑系统具备指导意义.