physical topology 中文意思是什麼
physical topology
解釋
實體布局-
But topology is no queerer than the physical world as we now interpret it
但是拓撲學並不比我們目前所能理解的物質世界更奇特。 -
The central hub has malfunctioned in the network. as a result, the entire network is down. which type of physical network topology is implemented
主要的集線器已經在網路里失靈。因此，這實體網路無法運作。在此是使用那種實體網路拓? -
The thesis is organized as below : in chapter 1, the background knowledge is given which is needed for study on bluetooth security mechanism and implementation. first bluetooth technology is overviewed including its develop history, radio interface, physical links, interference, network topology, core protocol, etc. next communication security is introduced according to the model of network security architecture from osi. finally some primary cryptographic techniques are discussed based on symmetric encryption, asymmetric encryption and advanced encryption standard published years ago
本文研究了利用藍牙技術提供各種安全服務和實現的課題，並通過一些具體實現的實例進行闡述，具體安排如下：在第一部分，本文首先回顧了藍牙技術及發展情況，主要包括藍牙發展簡史、藍牙標準的射頻介面、物理鏈路、干擾情況、網路拓撲結構以及核心協議等；然後介紹了通信安全的基礎知識，討論了osi系統中的四層網路安全結構模型；最後給出了各種加密技術的基本理論，包括對稱加密體制如des和blowfish 、非對稱加密體制（ rsa公鑰演算法、數字簽名和身份證明等）以及新一代的高級加密標準（ advancedencryptionstandard ， aes ）等。 -
Otherwise, ktrp has resulted in bypass routing between some wr. this thesis brings forward a method to improve ktrp aiming at the bypass routing problem. to improve ktrp, we basicly kept the tree - shaped topology, adding some physical loop to generate sigle - hop routing between some wr
針對ktrp協議中樹形拓撲可能造成部分wr之間形成迂迴路由的問題，本文提出了一種改進方法，在基本保持wr的樹形拓撲基礎上，增加少量物理環路，使部分wr之間形成單跳路由。 -
These lemmas together with spanning tree protocol and local address forwarding information for transparent bridges are taken to fulfil physical topology discovery in subnet finely
以引理為基礎，利用生成樹協議和地址轉發表，解決了對于網內物理拓撲的正確發現，更細致地顯示整個網路拓撲。 -
In recent years, it has been attracted considerable attention for a mass of researchers on networks in world, and become the hot research area of computer networks, in particular, has been widely used in network fault - location, performance measurement and count expense etc. based on careful analysis on related theory, technique and application of the topology discovery in world, the author first proposes a new physical topology discovery algorithm ( ptda ) for single subnet, next introduces the new algorithm into multi - subnet case, as a result, puts forward a new ptda for multiple subnets
拓撲發現廣泛應用於網路故障定位、性能測試和計費管理等方面。本文在深入分析國內外拓撲發現相關理論、技術和應用的基礎上，提出了單子網物理拓撲發現演算法，將單子網物理拓撲發現演算法擴展到多子網中，並提出多子網物理拓撲發現演算法。在研究單子網和多子網物理拓撲發現演算法的基礎上，提出了基於生成樹協議的物理拓撲發現演算法。 -
This paper describes solving the static rwa problem, an aspect of te problem in optical network, with simulated annealing algorithm. the static rwa problem is to allocate proper route and wavelength for a set of static requests on a wdm network with and without oxcs which physical topology is known
本文研究了用模擬退火演算法解決光網路業務量工程中靜態rwa問題，在已有網路上，根據多個業務需求，合理分配網路資源，完成端到端通路的建立，達到一定的優化目標。 -
The usb physical interconnect is a tiered star topology, with up to seven tiers
Usb物理互連是分層的星形拓樸，最多有七層。 -
A physical topology that contains switching or bridging loops is necessary for reliability, yet a switched network cannot have loops
實體拓樸內應含有交換器或橋接器的?圈，然而交換網路卻不能含有?圈。這會造成一個左右為難的狀況。 -
Y. bejerano, y. breitbart, m. garofalakis, and r. rastogi, “ physical topology discovery for large multi - subnet networks ”, july 2002, bell labs tech. memorandum
鄭海，張國清， 「物理網路拓撲發現演算法的研究」 ，計算機研究與發展， 2002年3月，第39卷3期。 -
It uses the new traffic matrix, current virtual topology situation and physical topology situation as input, compute a new virtual topology as output under the constraint which is the number of the different lightpahts between the old and new virtual topologies is not larger than the parameter nrange. in this chapter, i have implemented the algorithm by myself and a thoughfull study of two key procedures has been studied and the result of the algorithm simulation has been analyzed. we can get a new virtual topology by the virtual topology reconfiguration
我們通過虛拓撲重配置演算法得到了一個新的虛拓撲，但新舊虛拓撲的過渡仍然是一個很關鍵的問題，因為在新舊虛拓撲的過渡過程中會對上層的業務產生很大的業務中斷影響，因此找到一個合適的wdm光網路拆建光路的信令順序也是非常必要和具有現實意義的，本文第四章我們對一種光網路虛拓撲過渡過程演算法進 -
The beginning point of the first research direction is that we design a type of load - balancing virtual topology which is insensitive to the traffic, such plan method has been proposed whose name is vlbs ( valiant load - balancing schemem ), the disadvantage of vlbs is that it can only be applied to the homogeneous network in which each node has the same capacity, in chapter2, a more general valiant load - balancing scheme ( gvlbs ) has been proposed, the advantage of the gvlbs is that it can be used both on the homogeneous network and heterogeous network, in this chapter, we will give the detail derivation process and numerical analysis. the beginning point of the second research direction is that we first design a virtual topology for the physical topology under a specific traffic matrix, for a while, the traffic has changed, the network performence will decline. under such condition, in chpater 3, a virtual topology reconfiguration algorithm is studied which can decrease the average weighted hops
本文針對動態變化業務量情況下的wdm網路設計方法劃分為兩個主要的研究方向，第一個方向的研究出發點是可以在最初的虛拓撲設計過程中根據物理拓撲情況設計出一種虛拓撲出來，該虛拓撲是負載均衡的，在這種虛拓撲上跑的業務量矩陣特徵只要在某種范圍以內，無論它怎樣動態變化，網路都不會出現擁塞，但這種虛拓撲設計演算法vlbs的一個缺陷是它只能適用於同構網路，即每個節點所擁有的容量大小都相等，在第二章中，本文提出了一種更通用的負載均衡的光網路虛拓撲設計演算法gvlbs ，該演算法與傳統的負載均衡演算法vlbs不同之處在於vlbs演算法只能適用於同構網路而gvlbs演算法既可以適用於同構網路，又可以適用於異構網路，在本章中將給出了gvlbs演算法的的詳細推導和數值分析。 -
This algorithm can solve nicely the problem of physical topology discovery for different network equipments
該演算法很好地解決網路中不同類型設備的物理拓撲發現問題。 -
Secondly the paper pay attention to physical topology in ip subnet. here three lemmas are given and proofed
然後，本文研究了子網內物理拓撲發現演算法，提出並證明了三個引理。 -
In this paper, we present hlc topology model, which embodies the character of physical topology and collective communication
拓撲結構模型描述了網路的拓撲結構，它是全局通訊優化的重要依據。 -
Traffic engineering maps traffic into network ' s physical topology according to user ' s command, for optimizing network resource ' s allocating, avoiding network congestion and increasing network robustness
業務量工程技術就是按用戶的要求把業務量映射到網路的物理拓撲上，從而達到優化網路資源利用率、避免擁塞和提高網路可靠性的目的。 -
In optical network based on wdm, traffic engineering ( te ) is mapping traffic flows on the physical topology of optical network according to user ’ s requirement, in order to optimize the network utility, avoid jamming and improve the network reliability
在wdm光網路中，業務量工程技術（ trafficengineering ， te ）是按用戶的要求把業務量映射到光網路的物理拓撲上，從而達到優化網路資源利用率、避免擁塞和提高網路可靠性的目的。 -
On the basis of some conceptions relating to network and a brief survey of existing self - healing techniques, a norm named " the distributed character of traffic routes " is presented, which is used to judge that the survivability of a physical topology is good or not
在介紹了相關概念和回顧現有技術的基礎上，從實際網路中的業務需求分佈的角度，提出了一個可以用來衡量一個網路物理拓撲的生存性性能的指標? ?網路業務路由分佈特性。 -
First, the growing history and the basic principle of the wdm optical networks are introduced, then the construct of the wdm all - optical networks is discussed, physical topology and logical topology and so on. then, the routing technology in wdm system is presented in this paper, as well as key optical components in optical networks. the routing and wavelength assignment issue in the optimal design of rwa algorithm is particularly explored
論文介紹了波分復用系統的原理、發展歷程，討論了wdm全光網體系結構、網路物理拓撲和邏輯拓撲，光交換/光路由等技術和關鍵器件，著重研究波長路由型全光網優化設計中的路由和波長分配問題。 -
For a given network physical topology and long - term traffic pattern, design of delay - based logical topology can be formulated as a linear problem, a np - hard problem, which is computationally intractable for large size of networks. so, we pr opose a heuristic algorithm to address the problems of routing and wavelength assignment
基於業務平均跳數來衡量的模擬結果表明，在網路中不同qos要求的業務需求大致相當的情況下，不管網路負載如何變化，對某qos要求的vpn業務，總是能夠取得qos較之要低的業務更低的平均跳數，即更小的平均時延。
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