For obs technology , we presented a new scheduling policy containing both certain switching node architecture and scheduling algorithm . this scheduling policy can reduce packet loss rate in an obs network 在光突发领域,本文提出了一种包含一定的波长调度算法和交换节点结构的调度策略用于改进现有的obs网络丢包率。
Researchers have tried several detect methods , and made some improvements . but there are still deficiencies . there are many difficulties in detecting flaw location because of the complex construction 长期以来,研究工作者进行了多种探伤方法的尝试,取得了一定的成绩,但是还存在一些不足,原因是相贯节点结构复杂,超声探伤时缺陷定位的困难很多。
First , an analysis of present research situation was given in chapter 1 . second , a summary of the relating concepts and technology of optical network survivability was given in chapter 2 , which is the fundamental for farther discussion 然后对网络生存性的概念、光传送网的分层及节点结构以及光传送网生存性的基本技术进行了总结,为以后各章节的讨论提供了理论基础。
A novel method , called dpdp default path and dedicated path is introduced and an experiment is carried out to demonstrate the possibilities and rationality of node design , working process and corresponding communication protocol implemented by dpdp . the problems related with dpdp are also discussed at last 设计了一种新的骨干网中实现ip波长路由的方法,称为dpdp缺省波长和专用波长,设计实验验证了节点结构设计工作流程和相应通信协议设计的合理性,最后对相关问题进行了讨论。
In chapter 5 , after investigating the status and needs of transport network in a university , we propose a new wdm network architecture . the design is based on wdm on , and includes the principle of design , layering and protecting of network , composing of network ' s equipment , structure of nodes and realization of some services , etc . it gives an integrated exmple which is suitable for other metro wdm networks in the future 第五章,在研究某高校校园网现状和需求基础上,从校园网的设计原则、结构分层、网络保护、设备组成、节点结构以及业务实现等若干方面进行研究,我们提出一种以wdm光网络为传输平台,适用于较大规模校园网的完整解决方案。
A dbn structure consisting of fault hypothesis nodes , observation nodes , and repair nodes is brought forward , which combines the general bn and the requirements of fault diagnosis and maintenance decision . the mathematic description and knowledge inscapes of dbn are set forth at last . 3 以贝叶斯网络为基础,结合故障诊断与维修决策的需求和存在的问题,提出了基于故障假设?观测?维修操作节点结构的诊断贝叶斯网络模型,并给出了该模型的数学描述与知识构成要素。
After introducing the theoretic basis of the bn , it points out several problems of bn fault diagnosis and maintenance decision methods , and proposes a diagnostic bayesian network ( dbn ) model based on the fault hypothesis - observation - maintenance operation nodes . it deeply investigates several key techniques including knowledge expression of dbn , model construction of dbn , and diagnostic decision algorithms based on dbn . also it presents the designment and realization method of fault diagnosis and maintenance decision system based on dbn 论文首先阐述了贝叶斯网络的理论基础,然后针对贝叶斯网络故障诊断与维修决策方法存在的主要问题,提出了基于故障假设?观测?维修操作节点结构的诊断贝叶斯网络模型,并对模型的知识表达方法、模型建造方法和基于诊断贝叶斯网络模型的故障诊断与维修决策算法开展了深入研究,给出了基于诊断贝叶斯网络模型的故障诊断与维修决策系统设计和实现方法,主要内容包括: 1
The type of node structure realizing multi - granularity optical swithing in ason is put forward and a multi - granularity optical switch using this structure is developed . the software for controlling the node in ason is compiled . the experimental research is carried out with campus network as signalling network and the data network is of mesh architecture , which is a typical architecture in ason 本文提出了一种适用于自动交换光网络的多粒度光交换节点结构,并采用该结构研制出了多粒度光交换机开发了ason的节点控制软件数据网采用ason的典型结构格状网,利用校园网作为信令网进行了实验研究,验证了ason的主要功能。
The jdl model depicts the information fusion process of a single node in c4isr distributed information fusion system , but it only presents a conceptual framework of the structure of the process node . based on the blackboard model well known in ai , a kind of information fusion process node implementation method is proposed 扩展jdl模型刻画了在c ~ 4isr分布式信息融合系统的一个节点中进行的融合处理的基本内容,给出了融合节点结构的概念框架,对此模型可以采用多种方式来实现。
Because the classification indexes is difficult to determine in a specific engineering surrounding rock clsssification , the multiple layer feedforward neural network is used to determine the classification indexes through computating the node contribution rates of input layer and it ' s related formulas are also deduced in this paper . 2 . since the convergence rate of the bp network is slow and node structure of it ' s hide layer is difficult to determine , an improvement of the bp network algorithm and a method to determine the node structure of the hide layer are suggested in this paper 主要的内容有:一、针对在对特定工程围岩进行分类的过程中其分类指标难以确定的问题,提出用多层前馈型神经网络通过计算输入层节点贡献率的手段来确定分类指标的方法,并推导出计算过程;二、针对bp网络收敛速度慢和隐层节点结构难以确定的问题,对bp算法作了改进并给出确定隐层节点数的方法;三、鉴于面向对象的程序设计方法已非常流行,实现了面相对象的bp人工神经网络设计,并建立了围岩稳定性分类的bp网络系统;四、用实现的系统对广州抽水蓄能电站工程进行围岩稳定性分析评价,结果证明人工神经网络方法用于工程地质数据分析有着其他方法不可比拟的优越性。