The Feature of DDR SDRAM and the Implementation of DDR SDRAM Controllers via VHDL

1　ＩｎｔｒｏｄｕｃｔｉｏｎＮｏｗａｄａｙｓ,ｓｔｏｒａｇｅｔｅｃｈｎｏｌｏｇｙｈａｓｄｅｖｅｌｏｐｅｄｆａｓｔａｃｃｏｒｄｉｎｇｔｏｔｈｅｄｅｍａｎｄｏｆｄｉｆｆｅｒｅｎｔａｐｐｌｉｃａ ｔｉｏｎｓ .ＷｅｈａｖｅｈａｄＤｙｎａｍｉｃＲＡＭ (ＤＲＡＭ )ａｎｄＳｔａｔｉｃＲＡＭ (ＳＲＡＭ ) ,ＢｂｕｒｓｔＥｘｔｅｎｄｅｄＤａｔａＯｕｔ ｐｕｔＲＡＭ (ＢＥＤＯＲＡＭ ) ,ＳｙｎｃｈｒｏｎｏｕｓＤＲＡＭ(ＳＤＲＡＭ)ａｎｄＲａｍｂｕｓＤＲＡＭ(ＲＤＲＡＭ)ＮｏｗｗｅｈａｖｅａｌｓｏｈａｄＤｏｕｂｌｅＤａｔａＲａｔ…     

Scanning Tunneling Microscopy Studies of Agal Polysaccharide: Gelation of Carrageenan

ＳｃａｎｎｉｎｇＴｕｎｎｅｌｉｎｇＭｉｃｒｏｓｃｏｐｙＳｔｕｄｉｅｓｏｆＡｇａｌＰｏｌｙｓａｃｃｈａｒｉｄｅ：ＧｅｌａｔｉｏｎｏｆＣａｒｒａｇｅｅｎａｎTXＳｃａｎｎｉｎｇＴｕｎｎｅｌｉｎｇＭｉｃｒｏｓｃｏｐｙＳｔｕｄｉｅｓｏｆＡｇａｌＰｏｌｙｓａｃｃ...     

Numerical Determination of Stress Fields of and Forces on Line Dislocations in Anisotropic Multilayer Structures

ＮｕｍｅｒｉｃａｌＤｅｔｅｒｍｉｎａｔｉｏｎｏｆＳｔｒｅｓＦｉｅｌｄｓｏｆａｎｄＦｏｒｃｅｓｏｎＬｉｎｅＤｉｓｌｏｃａｔｉｏｎｓｉｎＡｎｉｓｏｔｒｏｐｉｃＭｕｌｔｉｌａｙｅｒＳｔｒｕｃｔｕｒｅｓＭａｒｕｎＪ．ＡｂｂｕｄｉＬ．Ｙ．ＰａｎｇＤａｖｉｄＭ．...     

A Study on The Optical Properties of InAs Microcrystallites Embedded in SiO_2 Glass Matrix

ＡＳｔｕｄｙｏｎＴｈｅＯｐｔｉｃａｌＰｒｏｐｅｒｔｉｅｓｏｆＩｎＡｓＭｉｃｒｏｃｒｙｓｔａｌｉｔｅｓＥｍｂｅｄｄｅｄｉｎＳｉＯ２ＧｌａｓＭａｔｒｉｘＪ．Ｚ．ＳｈｉＬ．Ｄ．Ｚｈａｎｇ（ＩｎｓｔｉｔｕｔｅｏｆＳｏｌｉｄＳｔａｔｅＰｈｙｓｉｃｓ，Ａｃａｄｅ...     

Design of IREDM System with a DSP Phase Detector

ＤｅｓｉｇｎｏｆＩＲＥＤＭＳｙｓｔｅｍｗｉｔｈａＤＳＰＰｈａｓｅＤｅｔｅｃｔｏｒ①ＬＩＵＪｉａｎｇｕｏ，ＷＥＩＱｉｎｇｎｏｎｇ（ＡｎｈｕｉＩｎｓｔｉｔｕｔｅｏｆＯｐｔｉｃｓａｎｄＦｉｎｅＭｅｃｈａｎｉｃｓ，ＣｈｉｎｅｓｅＡｃａｄｅｍｙｏｆＳｃｉｅｎｃ...     

A New Method of Studying Surface Activity for Liquid Alloys

ＡＮｅｗＭｅｔｈｏｄｏｆＳｔｕｄｙｉｎｇＳｕｒｆａｃｅＡｃｔｉｖｉｔｙｆｏｒＬｉｑｕｉｄＡｌｏｙｓ①②ＹＡＮＧＹｏｎｇｚｈｅｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＡｐｐｌｉｅｄｐｈｙｓｉｃｓ，ＮｏｒｔｈｗｅｓｔｅｒｎＰｏｌｙｔｅｃｈｎｉｃａｌＵｎｉｖｅｒｓｉ...     

Performance Analysis of Slotted Multichannel ALOHA Systems with Capture in Microcellular Environments

ＰｅｒｆｏｒｍａｎｃｅＡｎａｌｙｓｉｓｏｆＳｌｏｔｔｅｄＭｕｌｔｉｃｈａｎｎｅｌＡＬＯＨＡＳｙｓｔｅｍｓｗｉｔｈＣａｐｔｕｒｅｉｎＭｉｃｒｏｃｅｌｌｕｌａｒＥｎｖｉｒｏｎｍｅｎｔｓＸｉａｏｘｉｎＱｉｕ；ＶｉｃｔｏｒＯ．Ｋ．Ｌｉ（Ｕｎｉｖｅｒｓｉｔｙｏ...     

Electron Momentum Spectroscopy of Metal and Metal Oxide Thin Films

ＥｌｅｃｔｒｏｎＭｏｍｅｎｔｕｍＳｐｅｃｔｒｏｓｃｏｐｙｏｆＭｅｔａｌａｎｄＭｅｔａｌＯｘｉｄｅＴｈｉｎＦｉｌｍｓＸ．ＧｕｏＭ．ＶｏｓＳ．ＣａｎｎｅｙＡ．Ｓ．ＫｈｅｉｆｅｔｓＩ．Ｅ．ＭｃＣａｒｔｈｙＥ．Ｗｅｉｇｏｌｄ（ＥｌｅｃｔｒｏｎｉｃＳｔｒｕｃ...     

A New Optical Fiber Loop System Used in Measurement of Dispersion Compensation Ability

ＡＮｅｗＯｐｔｉｃａｌＦｉｂｅｒＬｏｏｐＳｙｓｔｅｍＵｓｅｄｉｎＭｅａｓｕｒｅｍｅｎｔｏｆＤｉｓｐｅｒｓｉｏｎＣｏｍｐｅｎｓａｔｉｏｎＡｂｉｌｉｔｙＭａｎｕｓｃｒｉｐｔｒｅｃｅｉｖｅｄＤｅｃ．２４，１９９６．ＳｕｐｐｏｒｔｅｄｂｙＫｅｙＰｒｏｊｅｃｔ...     

Measurement of the Residual Modal Reflectivity of AR Coating on a SLD

ＭｅａｓｕｒｅｍｅｎｔｏｆｔｈｅＲｅｓｉｄｕａｌＭｏｄａｌＲｅｆｌｅｃｔｉｖｉｔｙｏｆＡＲＣｏａｔｉｎｇｏｎａＳＬＤ￥ＭＡＤｏｎｇｇｅ；ＳＨＩＪｉａｗｅｉ；ＬＩＵＭｉｎｇｄａ；ＪＩＮＥｎｓｕｎ；ＧＡＯＤｉｎｇｓａｎ（ＪｉｎｎＵｎｉｖｅｒｓｉｔｙ，Ｃｈ...     

基于SPARQL-DL的语义Web服务查询

语义Web服务发现是当前Web服务研究领域的热点,其核心研究内容是服务描述及相应的发现方法.服务描述分为请求描述与发布描述,发布描述具有描述完整,信息丰富的特征,而服务请求描述仅关注服务的部分特征,通常不构成一个完整的服务描述.现有方法使用相同机制进行请求描述与发布描述,以比对请求与发布中对应部分的同一性或相似性作为匹配依据.构建假想的完整服务描述作为服务请求既不合理也难以实施,从而限制了方法的实用性.本文提出以语义Web查询语言SPARQL-DL作为服务请求描述语言,以OWL-S作为服务发布描述语言,将服务发现问题转化为知识库的查询,从而进行有效的服务发现.通过实验,证实了该方法具有实用性强,简单可靠的特点.     

多主导多随从电信增值业务供应链协调研究(英文)

In order to study supply chain of the telecom value-added service,a multi-leaders and multi-followers Stackelberg game model with multiple telecom operators and multiple service providers whose income is composed of information fee division and advertisement was constructed.Then a demonstration was simulated,and the results were compared with the situation of service providers' income only from information fee division.The simulated and compared results indicate that,the enterprises in the supply chain have...     

Analysis of the Competitiveness of Broadband over Power Line Communication in Korea

This study analyzes factors affecting the competitiveness of broadband over power line communication (BPLC) and predicts demand for the service, based on quantitative information about consumer preferences drawn from a survey of Korean consumers. Findings from the estimation suggest that, although consumers value some beneficial features of BPLC, to be competitive the speed and stability of its data transmission needs to be improved. Moreover, on the basis of a market simulation, we expect BPLC to occupy only a small portion of Korea's Internet access market in the future, a finding we expect would hold true for other developed countries whose Internet access markets are already mature.     

全球3G业务市场日渐成熟

全球3G市场进入2005年以来发展势头喜人,尤以日本和韩国的发展为最．主要表现在网络建设、用户增长和业务的丰富上。日韩以外的欧美市场积极稳步发展．已开始发力。亚太和东欧欠发达地区显现出巨大的市场潜力．备受关注。     

中国多媒体通信业务市场展望

多媒体通信发展如火如荼，对未来业务市场的正确估计将对网络的发展和建设具有重要的指导意义。本文提出ＩＰ网络、ＩＰ技术和宽带技术，社会发展影响是多媒体通信业务市场的构成因素，并在此基础上，通过列举详尽的数据，从业务终端，计算机普及率和上网率以及计算机的应用状况（包括商用和家用）等方面，对我国２０００年乃至２０１０年的多媒体通信业务市场进行了展望。     

Design of Efficient Generation Markets

The design of spot markets for generation services, such as energy, regulation,and operating reserves, and longer term markets for capacity, remain in evolution in many countries. Market design includes definition of the service, bid, or offer requirements, and rules for pricing and financial settlement. In the United States, most organized regional markets have converged on similar elements of spot market design. The design of capacity markets remains influx. Market power mitigation is currently a regulatory requirement in the United States, and experience with different methods shows that it must be carefully aligned with market design to ensure both efficient pricing and efficient investment. This paper surveys these topics and their relationships to each other and identifies researchable issues.     

An Approach to the Market Analysis of KoreaSat Services

The field of marketing research in the satellite communication services is still in the early stage of its development. Particularly, in Korean domestic satellite service market, many theoretical and methodological opportunities now exist. In this paper we develop a model, which identifies target markets and promising application services in Korean satellite communication service market. One key contribution of this paper is a modeling approach to the assessment of market potential and priorities of the application services in each Korean industry. We define and estimate the degree of attractiveness for each segmented market which represents the market potential estimated by current usage of terrestrial services and each market segment's willingness to adopt satellite technology. Since all possible satellite application services are not equally important in the market, they should be differentiated in terms of the likelihood of success. We introduce another index prioritizing application services by tying together three important factors affecting Korean satellite service demand. Some marketing implications of model results are also discussed. Finally the findings of our model are compared with those of other similar studies.     

TOPVISOR: Two‐level controller‐based approach for service advertisement and discovery in vehicular cloud network

Vehicular cloud is a kind of mobile cloud in which vehicles share their resources and provide services for each other. The first step in establishing a vehicular cloud network is the service advertisement and discovery. Due to the dynamic nature of vehicular cloud networks, services are not continuous and the service location may vary at any time depending on the vehicle location. Therefore, higher network traffic is generated to access the consistent and up‐to‐date information. In this paper, a two‐level hierarchical approach is proposed for service advertisement and discovery in vehicular cloud networks. To register the services' specification in this approach, the distributed directories in RSUs and central controllers are used. Moreover, a method is used to avoid extra update packets by localizing the updates. The simulation results show improvement in the packet delivery rate as well as a reduction in transmission bandwidth preventing the network congestion.     

The concept of an integrated terrestrial/land mobile satellite system

Potential satellite markets in the public safety (disaster relief, emergency medical, and law enforcement) and common carrier (mobile radio telephone) service areas are identified. The public mobile telephone segment is then examined to illustrate a methodology for identifying a potential satellite addressable market, including capacity requirements for roughly sizing a satellite. It is postulated that satellites could serve this lower density (mobiles per square kilometer), thin-route market at a competitive cost and thus complement terrestrial systems in the urban and more densely populated areas to provide an integrated nationwide mobile service.     

嵌入服务通告与发现的ZRP协议

服务通告和发现在MANET(Mobile Ad hoc Networks)网络中,是一个十分重要的组成部分.现有的服务通告和发现协议不是为MANET网络设计的.文章提出了一个适合MANET、基于ZRP(Zone Routing Protocol)的服务通告及发现协议.服务的通告与发现存在于ZRP路由控制分组中,避免了周期性的通告给MANET网络带来的负载,节约了有限的带宽和设备的能耗.