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Super-Resolution Based On Edge-Directed Pixel Decomposition

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Super-Resolution Based On Edge-Directed Pixel Decomposition

第一届建立和谐人机环境联合学术会议（HHME2005）

作者： BIE Hong-xia, BIE Zhi-song (school of information engineering, beijing university of posts & telecommunications, beijing 100876)

In this paper, we propose a novel super-resolution reconstruction scheme for still images. The basic idea is to decompose the mixed pixels present at the low spatial resolution into sub pixels accordi

关键词： Super-resolution quad-decomposition edge detection pixel unmixing

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屏蔽二进阵列偶的构造方法研究

通信学报 2008年第7期29卷 1-6页

作者：蒋挺施炯周正北京邮电大学泛网无线通信教育部重点实验室北京100876

准最佳、双准最佳屏蔽二进阵列偶具有良好周期相关特性,是对最佳屏蔽二进阵列偶的扩充。为深入完善屏蔽二进阵列偶理论,在最佳二进阵列偶、准最佳和双准最佳二进阵列偶构造方法研究的基础上,给出了3种最佳、准最佳、双准最佳屏蔽二进阵... 详细信息

准最佳、双准最佳屏蔽二进阵列偶具有良好周期相关特性,是对最佳屏蔽二进阵列偶的扩充。为深入完善屏蔽二进阵列偶理论,在最佳二进阵列偶、准最佳和双准最佳二进阵列偶构造方法研究的基础上,给出了3种最佳、准最佳、双准最佳屏蔽二进阵列偶的构造方法,即准最佳、双准最佳屏蔽阵列偶的复合构造法,利用最佳与准最佳屏蔽二进阵列偶来构造最佳屏蔽二进阵列偶,以及利用准最佳和双准最佳屏蔽二进阵列偶来构造准最佳屏蔽二进阵列偶。

关键词：信息论屏蔽二进阵列偶最佳信号相关信号

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大城市光区域接入网

铁道学报 2003年第3期25卷 112-116页

作者：孙强周虚北方交通大学电子信息工程学院北京100044 北京邮电大学电信工程学院北京100876

介绍了大城市光区域接入网方案,综合了电子IP路由器技术和光WDM层的智能网络功能。WDM在网络的光层提供了重要的网络功能,包括根据数据业务的需要对网络逻辑拓扑的重构,高速数据流的光波长交换,旁通路由器对数据的下载,光数据信号的波... 详细信息

介绍了大城市光区域接入网方案,综合了电子IP路由器技术和光WDM层的智能网络功能。WDM在网络的光层提供了重要的网络功能,包括根据数据业务的需要对网络逻辑拓扑的重构,高速数据流的光波长交换,旁通路由器对数据的下载,光数据信号的波长路由,针对光纤割断后的光域保护交换和服务的恢复,通过可调谐的波长连接器提供灵活快速的网络服务等。

关键词：接入网密集波分复用技术光分插复用器波长路由转发器

A Practical Approach to Resolving Combination Ambiguity in Chinese Word Segmentation

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A Practical Approach to Resolving Combination Ambiguity in C...

第八届国际信号处理国际会议

作者： Ying Qin Suxiang Zhang Xiaojie Wang school of information engineering beijing university of posts and telecommunications beijing 100876 Department of Electronic and communication engineering of North china Electric Power university Baoding 071003

＜正＞In Chinese word segmentation task, combination ambiguity is one of challenges not being well settled. The main obstacle exists in the detection of ambiguous words in given texts and their proper segmentations. This paper puts forward a practical approach to automatically collecting ambiguous words and disambiguating based on Maximum Entropy principle. The experimental result reveals the approach of automatic collection ambiguous words can detect combination ambiguity effectively avoiding arduous manual work. As to the disambiguation based on Maximum Entropy, we investigate new features grounded on prior and contextual knowledge and achieve promising result.

关键词：

Analysis on Orthogonal-Code Repeat Transmission for MIMO-OFDM System

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Analysis on Orthogonal-Code Repeat Transmission for MIMO-OFD...

中国通信学会第五届学术年会

作者： Liu Xiaomin Li Daoben Wu Huan Jiang Wei (school of information engineering, beijing university of posts and telecommunications, beijing 100876, china)

In this paper, we propose a repeat transmission scheme for MIMO-OFDM system. The data symbols are repeated in frequency and time domain by using orthogonal codes. The performance of the proposed system with 8 transmit antennas and 2 receive antennas is evaluated by simulations and different repetition schemes are employed for comparisons The results show that repeat transmission improves the performance of the MIMO-OFDM system for low-mobility scenarios. Besides, the zero-forcing receiver can further improve the system performance.

关键词： MIMO SISO OFDM QAM ZF

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IP/WDM网络中的光突发交换技术

铁道学报 2002年第5期24卷 76-79页

作者：周虚孙强北京邮电大学电信工程学院北京100876 北方交通大学电子信息工程学院北京100044

对光突发交换(OBS)技术的一些基本概念作了简述,并对其在因特网主干部分中的应用作了详细描述,给出了可行的网络结构和核心节点的设计。

关键词： IP/WDM网络光突发交换技术因特网主干部分核心节点 OBS 数据通信

Analysis of dispersion in the nano-InP doped fiber

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Optoelectronics Letters 2009年第1期5卷 37-40页

作者：段予文张茹郎佩林 Key Laboratory of Optical communication & Lightwave Technologies Ministry of Education of ChinaSchool of SciencesBeijing University of Posts and Telecommunications

We propose that nanomaterials are used for fibers.A novel nano-InP doped fiber has been fabricated by the method of modified chemical vapor deposition(MCVD).It has been measured that the doping concentration of phosphorus element is 0.1%.The relationship between refractive index and the wavelength is obtained by fitting experimental data to Sellmeier *** of the fiber has been calculated in the wavelength range of 1.2-1.6 μ*** the wavelength varies from 1.20 μm to 1.60 μm,dispersion paramete...

关键词： Dispersions Doping (additives) Fibers Light refraction Phosphorus Refractive index Refractometers

New Blue Ocean of Wideband Wireless Mobile Internet: Modern Service

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ZTE communications 2009年第4期7卷 16-20页

作者： Song Junde (beijing university of posts and telecommunications , beijing 100876 , P . R . china )

Wideband Wireless Mobile Internet (WWMI) has become one of the most important technologies for Modern Service. The Modern Service information communication multi-access network can easily realize the new operation modes formed by various Modern Service support systems. We think that under the new operation modes, the charges on calling and information will become more negligible, while the charge on services provided by the direct service support of various Modern Service platforms will turn into a major revenue source. It is suggested that the operators build an operation service support platform with common services to cooperate with thousands of information websites, help clients to transform information into profit and carry out operations and services.

关键词： New Blue Ocean of Wideband Wireless Mobile Internet Modern Service WiMAX

BROADBAND DIAL-UP USER BEHAVIOR IDENTIFICATION AND ANALYSIS

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BROADBAND DIAL-UP USER BEHAVIOR IDENTIFICATION AND ANALYSIS

2009 2nd IEEE International Conference on Broadband Network & Multimedia Technology（IC-BNMT2009）

作者： Dou Yinan Yan Hao Lei Zhenming school of information and communication engineering beijing university of posts and telecommunications beijing

With the evolvement of the Internet and network services,broadband user behavior tends to *** is a rising challenge for the network operators to understand network user *** this paper,we present a general approach for identification and profiling user behavior model by using data mining technique to analyze user activity *** present analysis of a data set comprised of the dial-up users’ usage data in a typical metropolitan area network of a national broadband operator in *** data recorded activity of over 250,000 unique user *** identify several main behavior groups by using K-means algorithm,and further summarize behavior profile of each user group as main user behavior *** results show that our approach can properly identify user behavior *** results provide a basis for network operators to understand dial-up user behavior,optimize network planning and adjust customer related policies accordingly.

关键词： dial-up user behavior data mining Kmeans algorithms user loyalty