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自动交换光网络连接管理系统的研究设计 被引量:2
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作者 叶建平 石林祥 +1 位作者 孙俊 魏学勤 《武汉理工大学学报(交通科学与工程版)》 2007年第3期449-452,共4页
分析了自动交换光网络连接管理系统的功能需求,设计了连接管理系统的主类,并将主类划分成表示层、业务逻辑层和数据访问层的多层结构.设计了端到端连接的创建流程,并通过时序图说明了对象之间的交互过程,以及对象协作图说明了对象之间... 分析了自动交换光网络连接管理系统的功能需求,设计了连接管理系统的主类,并将主类划分成表示层、业务逻辑层和数据访问层的多层结构.设计了端到端连接的创建流程,并通过时序图说明了对象之间的交互过程,以及对象协作图说明了对象之间的协作关系以及数据流向.最后,通过试验网对实现的连接管理系统进行了测试验证. 展开更多
关键词 自动交换光网络连接管理系统的研究设计
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基于城域网的“哈尔滨市商品房销售管理信息系统”设计研究
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作者 王增权 张瑞杰 《黑龙江科技信息》 2004年第8期82-82,共1页
本文首先论述了开发研制基于城域网的"哈尔滨市商品房销售管理信息系统"的目的和意义,接着详细地介绍了系统实现的功能,重点介绍了该系统的技术实施方案。
关键词 城域网 哈尔滨市 商品房 销售管理信息系统 设计 系统功能 网络连接设计
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Joint Network and Fountain Codes Design for RelayAssisted Multi-User System 被引量:1
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作者 HUANG Ying LEI Jing WEI Jibo 《China Communications》 SCIE CSCD 2015年第7期96-107,共12页
In relay-assisted multi-user system, relay coding is important to enhance the robustness and reliability of cooperative transmission. For better adaptability and efficiency, two joint network and fountain coding(JNFC)... In relay-assisted multi-user system, relay coding is important to enhance the robustness and reliability of cooperative transmission. For better adaptability and efficiency, two joint network and fountain coding(JNFC) schemes are proposed. When the condition of all direct channels is worse, JNFC scheme based on distributed LT(DLT) codes is used. Otherwise, JNFC scheme based on multi-dimensional LT(MD-LT) codes is suited. For both two above-mentioned schemes, the united degree distribution design method for short-length fountain codes is proposed. For the latter scheme, MD-LT codes are proposed for equal error protection(EEP) of each user. Simulation results and analysis show that the united degree distribution need less decoding overhead compared with other degree distribution for short-length fountain codes. And then, all users are protected equally in despite of asymmetric uplinks. 展开更多
关键词 relay coding network coding fountain codes LT codes Raptor codes DLT MD-LT EEP
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Research on the Automatic Pattem Abstraction and Recognition Methodology for Large-scale Database System based on Natural Language Processing 被引量:1
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作者 RongWang Cuizhen Jiao Wenhua Dai 《International Journal of Technology Management》 2015年第9期125-127,共3页
In this research paper, we research on the automatic pattern abstraction and recognition method for large-scale database system based on natural language processing. In distributed database, through the network connec... In this research paper, we research on the automatic pattern abstraction and recognition method for large-scale database system based on natural language processing. In distributed database, through the network connection between nodes, data across different nodes and even regional distribution are well recognized. In order to reduce data redundancy and model design of the database will usually contain a lot of forms we combine the NLP theory to optimize the traditional method. The experimental analysis and simulation proves the correctness of our method. 展开更多
关键词 Pattern Abstraction and Recognition Database System Natural Language Processing.
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A new variational inequality formulation for unconfined seepage flow through fracture networks 被引量:11
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作者 JIANG QingHui YE ZuYang +1 位作者 YAO Chi ZHOU ChuangBing 《Science China(Technological Sciences)》 SCIE EI CAS 2012年第11期3090-3101,共12页
Darcy's law only applying to the flow domain is extended to the entire fracture network domain including the dry domain.The partial differential equation(PDE) formulation for unconfined seepage flow problems for d... Darcy's law only applying to the flow domain is extended to the entire fracture network domain including the dry domain.The partial differential equation(PDE) formulation for unconfined seepage flow problems for discrete fracture network is established,in which a boundary condition of Signorini's type is prescribed over the potential seepage surfaces.In order to reduce the difficulty in selecting trial functions,a new variational inequality formulation is presented and mathematically proved to be equivalent to the PDE formulation.The numerical procedure based on the VI formulation is proposed and the corresponding algorithm has been developed.Since a continuous penalized Heaviside function is introduced to replace a jump function in finite element analysis,oscillation of numerical integration for facture elements cut by the free surface is eliminated and stability of numerical solution is assured.The numerical results from two typical examples demonstrate,on the one hand the effectiveness and robustness of the proposed method,and on the other hand the capability of predicting main seepage pathways in fractured rocks and flow rates out of the drainage system,which is very important for performance assessments and design optimization of complex drainage system. 展开更多
关键词 fracture network seepage flow free surface variational inequality condition of Signorini's type
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