comparison of ad hoc routing protocols ppt

... (9). Figure 3 shows a non-tree representation of the coherence structure of (9). Here, the heads of the arrows represent the directionality of a relation. Figure 3. Non-tree coherence ... multiple clusters. In order to compute the weight of a sentence, the weights of all clusters in that sentence are added. The higher the weight of a sentence, the higher is its ranking. A more ... weight of sentence i in document j, n si is the number of words in sentence i, k is the kth word in sentence i, tf jk is the frequency of word k in document j, n d is the number of documents...

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... achieved. 10.4 Routing in Wireless Ad Hoc Networks A brief introduction to packet routing in wireless ad hoc networks was made in Chapter 2. There, it was highlighted that the performance of such protocols ... Source Routing Protocols for Mobile Ad Hoc Networks, IETF Draft, October, 1999. [18] Toh C. K. A Novel Distributed Routing Protocol to Support Ad Hoc Mobile Computing, in Proceedings of IPCCC ... assumption of a static topology is made. Thus, new routing protocols are needed for the dynamically changing ad hoc wireless environment. This section describes some representative routing protocols...

Ngày tải lên: 29/09/2013, 21:20

... referred to as mobile ad hoc networks (MANETs) [33] or as infrastructure-less wireless networks. 1.2 Mobile Ad Hoc Networks A Mobile Ad hoc NETwork (MANET) is a system of wireless mobile ... and Local Ad Hoc Wireless Networks M arco Conti 2 M ulticasting Techniques in Mobile Ad Hoc Networks X iao Chen and Jie Wu 3 Qualit y of Service in Mobile Ad Hoc Networks ... of them is eliminated by optimizing over the secondary metric (say delay), and so on. The mobility of mobile ad hoc networks adds another dimension of difficulty. Highly mobile hosts in the ad...

Ngày tải lên: 03/06/2014, 01:08

... effective transport capacity of ad hoc dispersed spectrum cognitive radio networks is derived, and the effects of 3D node distribution on the effective transport capacity of ad hoc dispersed spectrum ... M- QAM) schemes. We then consider the deployment of such cognitive radio systems in an ad hoc fashion. We consider an ad hoc dispersed spectrum cognitive radio network, where the nodes are assumed to ... ticle Performance Analysis of Ad Hoc Dispersed Spectrum Cognitive Radio Networks over Fading Channels Khalid A. Qaraqe, 1 Hasari Celebi, 1 Muneer Mohammad, 2 and Sabit Ekin 2 1 Department of Electrical and...

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... MAC protocols in ad hoc networks Research efforts in the field of access mechanisms for single-channel ad hoc networks have been extensive. For example, a multiplicity of single-channel MAC protocols has ... 2011:108 http://jwcn.eurasipjournals.com/content/2011/1/108 Page 3 of 15 2. T Bheemarjuna Reddy, I Karthigeyan, BS Manoj, C Siva Ram Murthy, Quality of Service Provisioning in Ad hoc Wireless Networks: A Survey of Issues and Solutions. Ad Hoc Networks. ... end of an ATIM window, it has to wait for the next data interval and an additional delay of T c is added. Hence, the overall delay is D = D 0 + M · T c , (15) where M denotes the number of additional...

Ngày tải lên: 20/06/2014, 22:20

... the performance of any coherent gain allocation scheme. While the impact of estimation noise on all protocols of Section 4 is the same, the impact of phase noise is not. In this section, the impact of relay ... accuracy of the channel estimates obtained by the protocols is different. For symmetry reasons we can constrain ourselves to the discussion of only two of the four protocols. We quantify the quality of ... the impact of additive noise and relay phase noise on the quality of the channel estimates delivered by the protocols. Finally, we compare the quality of the channel estimates produced by the protocols...

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... examined the expression status of several of the identified proteins using western blotting. These repre- sentative proteins were selected based on changes of more than twofold in in their expression ... MS analysis. Patients who had received any chemo- and ⁄ or radiotherapeutic treatment before surgery were excluded from this study. Isolation of membrane proteins from tumoral and adjacent normal tissues After ... completely dissolved. Proteins were chemically reduced by adding 1.28 lLof 200 mM Tris(2-carboxyethyl)-phosphine and alkylated by adding 0.52 lL of 200 mm methyl methanethiosulfonate at room temperature...

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... em- ploying each of these parsing alternatives? Each of these four questions is addressed in the four subsequent sections of this paper, fol- lowed by a discussion of the implications of our findings ... of new parse tree paths that yield additional candidate answers. Conversely, the recall scores of each system show their great- est gains early, and then slowly improve with the addition of ... presents a comparison of the f-score learning curves for all five of the approaches. In each approach, the precision scores slowly degrade as more training examples are provided, due to the addition...

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... presence of EDTA. The rough S. minnesota LPS increased the initial fast phase of the reaction, but decreased the rate of the slow phase of oxidation in the presence of EDTA. A comparison of rough ... studied. A comparison of the auto-oxidation of cross-linked Hb with that of Hb A 0 is shown in Fig. 3A. The effect of the presence of EDTA, known to bind heavy metal cations [16], on the oxidation of ... LPS. Fig. 2. Comparison of the effects of the LPSs of rough S. minnesota 595 (Re) and smooth S. minnesota, in the absence and presence of EDTA, on the oxidation of a, a-cross-linked Hb. Themean±SDofthreeinde- pendent...

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... results of a comparison of the concentration dependence of TH activity among AnpAFP, TisAFP and fish type III AFP. It also shows the concentration dependence of TH of a recombinant TisAFP isoform ... noted that the TH value of the TisAFP natu- ral product (i.e. isoform mixture) was approximately half of that of the TisAFP8 isoform, suggesting a very low percentage of TisAFP8 in the TisAFP ... Alignment of the N-terminal sequences of AnpAFP with those of three TisAFP isoforms. The 10th residue from the N-termi- nus of AnpAFP (marked X) could not be conclusively identified using Edman degradation....

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