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Primarily, the thesis assays the condition of network framework, the network was divided into three levels in terms of network management in order to establish the distributed method ,and still pointing out the intention and denotation of studying the Topology Discovery.Next, the thesis analyzes SNMP protocol minutely, including its development, principle, and the Network Management system that established on the SNMP protocol. Have analysed MIB in detail and the application way of MIB in network management .The thesis also assays the ICMP protocol, describing its working principle and the format of datagram minutely , and describing two important tools of ICMP- Ping and TraceRoute in detail. On the base of upper analysis, the thesis expounds a kind of distributed Topology Discovery project, and book it in one autonomy system. Topology Discovery was divided into two levels in terms of network management, and analyses the way of linking up between the two level. The thesis minutely assays Router-Level Topology Discovery technology basing on SNMP and Subnet-Level Topology Discovery technology basing on ARP and ICMP. According to these analyses, the thesis explores the specific methodology and the technology of XML data object which using the WinSNMP API to achieve topology discovering system on the development platform of Visual C++, and also analyses the technology of topology analysis and topology graph minutely. Moreover, the thesis assays the technology of basic firewall and Topology Discovery response strategy. Finally, the thesis analyses the underlying blind problem of the topology finding, and also analyses the reason that the blind problem produced and the way that reduced. The distributed algorithm that this paper puts forward has a certain directive significance in wireless network or other fields.

本文首先分析了网络结构状况，将网络从网络管理的角度划分为三个层次，为分布式的方法奠定了基础，同时还指出拓扑发现研究的目的及意义；接着本文分析了SNMP协议，详细分析了SNMP协议的发展状况，协议的工作原理，以及由SNMP协议基础上建立的SNMP网络管理体系，详细分析了MIB，以及MIB在网络管理上的应用方式；本文又分析了ICMP协议，详细描述了ICMP的工作原理和数据报格式，并详细描述了ICMP的两个重要工具-Ping 和TraceRoute；然后本文在结合上述分析的基础上，提出了一种分布式的拓扑发现方案，将拓扑发现拟订在一个自治系统内，将拓扑发现从网络管理角度划分为路由器级和子网级两个层次，分析了两个层次之间的衔接方式，同时从拓扑地域的角度将拓扑发现过程分布化，分析了分布式算法的具体方法和分布式结点之间的数据通讯方法，本文详细分析了基于SNMP的路由器级拓扑发现技术和基于ARP和ICMP的子网级拓扑发现技术；根据这些分析，本文利用XML数据对象作为分布式算法中的数据对象，分析了XML的技术，本文使用Visual C++开发平台实现网络拓扑发现系统，详细分析了使用WinSNMP API实现基于SNMP的路由器级拓扑发现和基于ARP的子网级拓扑发现，分析了使用Winsock编程实现基于ICMP的子网级拓扑发现，本文还对拓扑分析和拓扑图的绘制技术作了较细致的分析；本文最后还分析了基本防火墙技术，分析了几种类型的防火墙对拓扑发现带来的影响，以及在拓扑发现时的应对策略，本文还分析了拓扑发现中可能产生的盲点问题，分析了盲点产生的原因以及拓扑发现中减少盲点的方法。

Wehave obtained two formulas to express thire relation in different view;at the same time,wegive an explicit description of multiplicative unitary operators corresponding to compactquantum group 〓 and 〓 on concrete Hilbert spaces.

我们首先在第四章讨论了紧量子群对应的乘法酉算子和紧量子群与离散群的交叉积对应乘法酉算子的关系，我们得到了在不同观点下的它们之间的关系式；同时给出了紧量子群〓对应的乘法酉算子和〓对应的乘法酉算子在具体的Hilbert空间上它们之间的表达式。

What if some demon were to say to you ,that shis life ,as you now live it,have lived it in the past, you would have to live once more but-innumerable times more,there will be nothing new in it,every pain,every joy,every unutterably,small or great thing in your life would just return to you The same succession ,the same sequence,again and again,like an hourglass of time ,Imagine infinity,you choose for all time,Then all unlived life would remain -inside you, Unlived,Throughout eternity.

晕死了 ，小雅！~你在那个群啊！~！~这样一座在深夜里会闭上眼睛的城市。行走在里面，人与人之间，人与所有其他事物之间始终有距离感。仿佛无法与这时尚的事物真正的靠近。但这种无法靠近，却让自己觉得清净和安全。不知道为什么我喜欢那种疏远的安全感。这段偶同意，距离很多时候反倒有安全感！品种单一，我也没办法！当我写一篇东西不能最大限度的引起人的共鸣的时候，我只能说我很失败！

The device, from above to below, includes a floor decoration layer, a phase-changing material layer, an air duct, a radiation protection film, a thermal insulation layer and a floor base layer in turn; keels are arranged between the floor decoration layer and the floor base layer, at least a heat supply waterpipe or a electrical heating film are buried in the phase-changing material layer between adjacent keels; a wind gap is arranged at both ends of the air duct to communicate with indoor air.

该装置自上而下依次包括地板装饰层、相变材料层、空气通道、防辐射膜、保温层和地板基层；在地板装饰层和地板基层之间设有龙骨，在相邻龙骨之间的相变材料层中埋有至少一根供热水管或一个电加热膜；在空气通道的两端设有风口与室内空气相通。

Paragraph 1 may be invoked between original Members of the WTO which were contracting parties to GATT 1947 only where Article XXXV of that Agreement had been invoked earlier and was effective as between those contracting parties at the time of entry into force for them of this Agreement.

对于原属GATT1947缔约方的WTO创始成员，只有在这些缔约方以往已经援引GATT1947第35条，且在本协定对其生效时，该条款仍然在它们之间有效的前提下，第1款的规定方可在它们之间援引。

Paragraph 1 may be invoke d between original Members of the WTO which were contracting parties to GATT 1947 only where Article XXXV of that Agreement had been invoke d earlier and was effective as between those contracting parties at the time of entry into force for them of this Agreement.

对于原属GATT1947缔约方的WTO创始成员，只有在这些缔约方以往已经援引GATT1947第35条，且在本协定对其生效时，该条款仍然在它们之间有效的前提下，第1款的规定方可在它们之间援引。

The coagulant has high rate of the turbidity when the pH value of the solution is 8～9, the dosage(Fe3+) is 2～5 mg/L and alkalization of PFS is 7%～14% in flocculating experiment by PFS made for the flotation waste water.

用制备的PFS进行絮凝实验，在处理选矿废水时，当溶液的pH值在8～9之间，投加量为2～5mg/L（以Fe3+计）时，聚合度在7%～14%之间时，聚合硫酸铁对废水浊度去除有较好的效果。

After centrifugation, the extracts were separated on HILIC column by using acetonitrile-water as mobile phase. The analytes were identified and quantitated by LC-tandem MS under the positive/negative electrospray ionization and multiple reaction monitormode. The calibration curves showed good linearity in the range of 25-5000 μg/kg for melamine and cyanuric acid, and 50-10000 μg/kg for ammeline and ammelide. The limits of detection and limits of quantification were in the range of 5-20 μg/kg and 50-100 μg/kg, respectively.

牛奶样品直接用乙腈超声波提取；奶粉样品先用水溶解后再加乙腈超声波提取，高速离心后以乙腈－水为流动相，采用亲水作用色谱柱分离这4种化合物，在电喷雾正、负电离切换多反应监测模式下进行定性与定量分析，三聚氰酸一酰胺与三聚氰酸二酰胺含量在50~10000μg/kg之间、三聚氰胺与三聚氰酸在25~5000μg/kg之间，均获得良好的线性。

Participants and methods 1、All participants were diagnosed with NAFLD byabdominal ultrasonography in lst affiliated hospital of JI NAN University frommay 2006 to march 2007. 2、All participants had no history of viral hepatitis orexcessive drinking(alcohol intake less than 140g per week for male and 70g perweek for female). 3、Detail history, anthropometrical parameters (height,weight,waistline and hipline). A B-mode ultrasonic examination was performed todetermine the liver fat content and participants were divided into the following threegroups based on their liver fat content: mild fatty degeneration group, moderate fattydegeneration group,severe fatty degeneration group.

对象与方法1、本研究以2006年9月至2007年3月在暨南大学附属第一医院内分泌科门诊、消化科门诊和体检中心初诊为NAFLD者为研究对象，总共有NAFLD组病人405例，男性232例，女性173例，年龄在20-80岁之间，平均年龄56.6±6.89岁，按B超的检查结果NAFLD组病人分为轻度NAFLD组、中度NAFLD组、重度NAFLD组，各组性别构成和年龄差异无统计学意义。2、选择年龄在20-80岁之间的健康体检者并行B超检查排除NAFLD者为对照组，共119例。

The results showed that the semivariogram of S.granarium was described by a spherical model,and indicated an aggregated special pattern ranging from 21 to 61cm. The semivariogram of Aphidius sp.could be also well described by spherical model, and indicated an aggregated spatial pattern ranging from 36 to 55cm.The amount and spatial distribution of Aphidius sp. w...

结果表明，不同时期麦二叉蚜种群的半变异函数曲线皆为球型，其空间格局为聚集型，变程在 2 1～6 1cm之间；蚜茧蜂种群的拟合半变异函数曲线也表现为球型，呈聚集空间格局，空间变程在 36～ 5 5cm之间，并与麦二叉蚜种群在数量和空间上有较强的追随关系，说明蚜茧蜂种群是麦二叉蚜种群的优势种天敌。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。