第三代移动通信中AMR语音编码的差错隐藏技术

介绍了第三代移动通信中AMR（自适应多码率）语音编码的帧格式，进一步描述了错误检测的基本方法，详细说明了语音编码对丢帧采用的差错隐藏技术。     

OLED显示器风靡SID研讨会

SID2006年会无论是在论文发表的数量上,还是在参展商的数量上都创下了历史记录。在研讨会上和展厅上展示的OLED显示器及其相关技术受到了最多的关注。本文将简单介绍SID2006年会期间,OLED这个新兴的技术取得的最引人关注的进展。     

面向电信运营管理的中间件平台的研究与实现

为了解决电信运营支撑系统应用上多年来形成的“信息孤岛”问题,为客户提供端到端的良好服务,同时支持对新的电信业务的快速开发和对现有异构系统的互联互通,电信管理论坛(TMF)提出了新一代运营支撑系统软件框架NGOSS。该文在分析了国内目前电信运营支撑系统OSS/BSS的现状和NGOSS的主要技术特点的基础上,遵循NGOSS框架的思想,提出了一个面向电信运营管理的中间件平台,实现了其原型系统,并在平台上完成了用于支持电信网络管理业务流程运行的实例。     

2007年显示周:从追求最大到追求最佳的转变

在2007年显示周上展示的大屏幕显示器中,液晶显示器(LCD)仍然占据着最醒目的位置,然而也更多地关注质量而不再单纯地追求尺寸的大小。     

SID的荣誉和奖项：Uchida领衔SID 2008年度获奖者

近40年来,Tatsuo Uchida博士致力于液晶显示器的研究,并在无数曾接受过他指导的学生当中产生了持久的影响,其中包括那些参与过他开创的旨在培养显示行业工程师的特别项目的学生。     

舒适噪声生成算法研究

舒适噪声生成技术的研究目的在于能够更为接近的还原实际的背景噪声.具体的实现方法是利用线性预测算法在接收端对背景噪声进行还原,即利用背景噪声的有效载荷包括噪声级别的描述以及反射系数形式谱信息,在接收端生成舒适噪声.而系统模型的阶数则不必传输,因为这个数值是可以从有效载荷的长度中获得,从而能够较好的还原出语音通信中的背景噪声.舒适噪声生成算法的评估是通过引入舒适噪声有效载荷完成的,通过比较原始语音信号以及经过静音检测、CNG算法还原出的语音信号,结果表明在无噪声背景以及有低频噪声背景的情况F,对原始语音信号经过静音检测后插人生成的舒适噪声,能较好地恢复出原始的语音信号.     

高职院校计算机实验室管理与维护探索

针对高职院校计算机实验室特点,探索架设一套集系统、教学软件、考试系统于一体的计算机系统。此系统可作为各机房的初始系统平台,针对不同配置的计算机,无须重新安装系统和应用软件,运行稳定,易于维护,能满足学院计算机教学和各种计算机职业资格证书考试。     

N4SID and MOESP algorithms to highlight the ill-conditioning into subspace identification

In this paper,an analysis for ill conditioning problem in subspace identifcation method is provided.The subspace identifcation technique presents a satisfactory robustness in the parameter estimation of process model which performs control.As a frst step,the main geometric and mathematical tools used in subspace identifcation are briefly presented.In the second step,the problem of analyzing ill-conditioning matrices in the subspace identifcation method is considered.To illustrate this situation,a simulation study of an example is introduced to show the ill-conditioning in subspace identifcation.Algorithms numerical subspace state space system identifcation(N4SID)and multivariable output error state space model identifcation(MOESP)are considered to study,the parameters estimation while using the induction motor model,in simulation(Matlab environment).Finally,we show the inadequacy of the oblique projection and validate the efectiveness of the orthogonal projection approach which is needed in ill-conditioning;a real application dealing with induction motor parameters estimation has been experimented.The obtained results proved that the algorithm based on orthogonal projection MOESP,overcomes the situation of ill-conditioning in the Hankel s block,and thereby improving the estimation of parameters.     

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.