performance comparison of adhoc routing protocols

... estimates and therefore 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 ... 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 ... large σ 2 pn , the performance of both protocols converges because the phases of the channel estimates will asymptotically be uniformly distributed. Furthermore, it can be observed that the comparison...

Ngày tải lên: 21/06/2014, 17:20

... specifications of the routing protocol. 5. CONCLUSION In this paper, we have analyzed the performance of the novel fuzzy-based pr iority scheduler for data trafficandevaluated the effect of inclusion of this ... under- lying multicast routing protocols, like NTPMR, CAMP, and ODMRP, run over IEEE 802.11 as the MAC protocol. Queu- ing dynamics with different degrees of mobility and routing protocols show that ... expiry time of packet, queue length of the node, and data rate of the source, are considered and the application of fuzzy logic to combine these variables and hence find the pri- ority index of the...

Ngày tải lên: 23/06/2014, 00:20

... choose the first sentences of each 1 We did not use any machine learning techniques to boost performance of the algorithms we tested. Therefore performance of the algorithms tested here ... 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 ... definition of discourse segments because we used the discourse trees from Carlson et al. (2002)’s database of coherence- annotated texts. 3.1.2 Kinds of coherence relations We assume a set of coherence...

Ngày tải lên: 17/03/2014, 06:20

... might terminate before reaching the end of the network. 2.2 Performance metrics of interest In this work, the performance of probabilistic multihop broadcast protocols will be investigated using ... conditions— this is the very idea of IF. The shape of p, as a function of d, is shown in Figure 5, for different values of c and ρ s . It can be observed that the PAF of SIF is monotonically increasing ... the average global performance metrics (namely, RE, D, and TE), on the basis of the average local performance metrics of a generic TD. We recall that, thanks to the assumptions of the deterministic...

Ngày tải lên: 20/06/2014, 20:20

... development of agent platforms which include an abstract architecture and a set of interaction protocols (IPs) [4]. Key points in the development of multiagent systems are the design of behaviors, ... length of each FIPA message is around 282 characters. This value can change; it depends on the content of the message. For the purpose of the tests, only the agents’ threads were running within soft ... within soft real-time heap of the AJ- 100 microprocessor. In addition, the length of the messages was held constant. In the case of the request protocol, the amount of sent and received messages...

Ngày tải lên: 22/06/2014, 05:20

... development of agent platforms which include an abstract architecture and a set of interaction protocols (IPs) [4]. Key points in the development of multiagent systems are the design of behaviors, ... previous work of the authors [17] measured the aver- age round trip time (aRTT) of single inform messages. The purpose of the test was to observe the scalability in terms of pairs of agents. The ... investigated the performance of the agent platform MicroFIPA-OS running on handled de- vices and wireless transmission media at 9600 bps. The work shows the timing response of the request interaction...

Ngày tải lên: 22/06/2014, 19:20

... ninety percent probability of detection for that SNR. The false track performance at the SNR values of interest is shown in Tab l e 2. The false track performance of the PDAF-AI is clearly unac- ceptable ... detection performance of four alternative track-before- detect algorithms has been investigated for a range of target SNR values and speeds. For most of the scenarios the differ- ence in detection performance ... Algorithm tuning Each of the algorithms has a number of different parame- ters which need to be selected to ensure good performance. It is of interest to characterise how algorithm performance varies...

Ngày tải lên: 22/06/2014, 19:20

... sent. 4. PERFORMANCE COMPARISON OF THE PROTOCOLS For performance evaluation of different protocols, the latest version of OPNET was u sed, which supports DSR, TORA, and AODV protocols. For all simulations, ... find any dependence of route dis- covery time on the number of loads. Figure 27 shows the performance of the AODV protocol in terms of the number of hops per route as a function of S. Ahmed and M. ... vector (AODV) routing, and temporally ordered routing algorithm (TORA). Although considerable amount of simulation work has been done to measure the performance of these routing protocols, due...

Ngày tải lên: 22/06/2014, 22:20

Ngày tải lên: 12/08/2014, 01:22

... School of Pharmacy, University of Maryland, Baltimore, Maryland, USA, 2 Department of Psychiatry, School of Medicine, University of Maryland, Baltimore, Maryland, USA, 3 Departments of Psychiatry ... (110/1908) of US medicated youth, 1.9% (18/937) of medicated Dutch youth and 4.6% (62/1358) of medi- cated German youth. Discussion The major finding of this cross-national prevalence study of psychotropic ... use of common surgical procedures: an inter- national comparison of New England, England, and Norway. N Engl J Med 1982, 307:1310-1314. 13. Sheehan KH: Caesarean section for dystocia: a comparison...

Ngày tải lên: 25/10/2012, 10:06

... Evaluation of Brucellacapt for the diagnosis of human brucellosis. Journal of Infection 2004; 49: 102–108. 3. Clavijo E, Diaz R, Anguita A, Garcia A, Pinedo A, Smith HL. Comparison of a Dipstick ... T. Comparison of Coombs and immunocapture-agglutination tests in the diagnosis of brucellosis. Chin Med J 2005;118(3):252-4. 6. Prado A, Gutierrez P, Duenas A. Serological follow-up of bru- cella ... Gültekin M, Mamıkoğlu L. Comparison of serologic tests which are used in the diagnosis of Brucellosis. Mikrobiol Bült 2005;39:291-9. 12. Alışkan H. Diagnostic value of Culture and serological...

Ngày tải lên: 25/10/2012, 10:56

... Similar activities of these two generations of BMP adenoviral vectors were found in all models. These results indicate that the amount of viral gene expression and the source of the BMP cDNA are ... BMPs, BMP9 uses a different type of receptor and signal transduction pathway, the details of which are not yet clear [30, 40]. The functional performances of various BMP adenoviral vectors ... the deletion of the E1 and E2b genes and the use of homologous (rat) BMP genes do not improve the osteogenic potential of direct BMP adenovirus vector gene therapy, the results of this study...

Ngày tải lên: 31/10/2012, 17:08

... end of the dissection of the first thyroid lobe while the infusion of remifentanil 0.05-0.25 µg/kg/min was maintained until the last surgical stitch. If surgery had to be prolonged because of ... were enrolled. After the dissection of the first thyroid lobe, all patients received 1g of paracetamol and 20 mg nefopam IV as part of multimodal prevention of postoperative pain. Except for ... parameters were recorded: time of extubation, first VAS pain scores, the necessity, the amount of morphine titration to reach a VAS of < 40, the incidence of nausea and Int. J. Med. Sci....

Ngày tải lên: 02/11/2012, 10:14

... enough to build up a coherent theory of the origin of the brain abnormality in schizophrenia . This paper describes a state -of- the-art approach of SPECT to correlate neuropsychological ... picture of the pattern of brain perfusion immediately after administration. Therefore, the effect of sedation on measured rCBF should be negligible. Thirty minutes after the administration of ... group. Table 3 shows the comparison of the mean values of relative perfusion in schizophrenic subjects pre and post treatment. The results show that the mean rCBF values of the schizophrenic patients...

Ngày tải lên: 02/11/2012, 11:12

... large inventory of normalized mathematical indexes of abnormality. It is the pattern of these mathematical indexes of abnormality, ob- tained from analysis of multiple cardiac cycles of the resting ... (0.86-0.903).(Figure 2). The coordinates of the curve confirmed that a cut-off score of 4.0 pro- vides the best combination of sensitivity and specific- ity for the prediction of relevant coronary stenosis ... assumptions about the distribution of the data (normal distribution) were not violated. Discussion The overall sensitivity of 91% and specificity of 85% of the MCG device in this meta-analysis...

Ngày tải lên: 03/11/2012, 10:58

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Ngày tải lên: 05/09/2013, 14:58

Ngày tải lên: 05/09/2013, 14:58