Báo cáo hóa học: " Research Article Optimum Detection of Ultrasonic Echoes Applied to the Analysis of the First Layer of a Restored Dome" pot

... pagesdoi:10.1155/2007/26560 Research Article Optimum Detection of Ultrasonic Echoes Applied to the Analysis of the First Layer of a Restored DomeLuis Vergara, Ignacio Bosch, Jorge Gos´albez, and Addisson SalazarDepartamento ... locations(separation between two consecutive locations was 2 cm)crossed some areas where modiﬁcations had been made to the surface (a special type of paper was attached to the wall after preparation of the ... will consider the three optimum de-tectors for the problem in hand.4. ANALYSIS OF THE FIRST L AYER OF ARESTOREDDOME The research of this work is done under the framework of a collaboration between...

Báo cáo hóa học: " Research Article Automatic Detection and Recognition of Tonal Bird Sounds in Noisy Environments" pot

... pointwas detected as tonal. Since the bird database contains birdsounds of various character, and there is no label informationindicating which part of the signal is of a tonal character,we adopted ... evaluation of the detection of bird tonal regions at the spectral-level as a function of the local SNR. The local SNR for a given frequencypoint was calculated as the ratio of the energy of the cleansignal ... clean data. We can seethat at a given false-acceptance error, the frame length of 32 samples provides the highest percentage of bird framesdetected as tonal on the clean data. For instance, at...

Báo cáo hóa học: " Research Article Decentralized Detection in IEEE 802.15.4 Wireless Sensor Networks" doc

... to transmit data. The duration of the active part, namely, the superframe duration, and of the entire superframe, namely, the beacon interval, depend on the value of two integer parameters ranging ... Networking and ApplicationsWorkshops (AINAW ’07), pp. 899–904, Niagara Falls, Ontario,Canada, May 2007.[15] M. Martal`o, S. Busanelli, and G. Ferrari, “Markov Chain-basedperformance analysis of ... RemarksIn this paper, we have proposed a mathematical framework to study decentralized detection in IEEE 802.15.4 WSNs.In particular, on the basis of an analytical computation of the probability...

báo cáo hóa học:" Research Article CFAR Detection from Noncoherent Radar Echoes Using Bayesian Theory" potx

... M. V. Greco, M. Diani, and L. Verrazzani, “Perfor-mance analysis of two adaptive radar detectors against non-Gaussian real sea clutter data,” IEEE Transactions on Aerospaceand Electronic Systems, ... then estimated withC instead of X, that is, X is replaced withC.2.2.4. False Alarm Rate and Probability of Detection. The expressions of the false alarm rate PFAand the probability of ... experimental and theoreticalinvestigations have studied the feasibility of detection with a constant false alarm rate (CFAR). In CFAR detection, the localseaclutterpowerinarangecellundertest(CUT)is adaptively...

Báo cáo hóa học: "Research Article Minimizing Detection Probability Routing in Ad Hoc Networks Using Directional Antennas" pptx

... like path1→ path2→ ··· → path∗x/GeneratePath(AvailablePath)while AvailablePath != Emptypath= GetPath(AvailablePath)/∗Calculate the total detection probability (TDP) of path∗/TDP= ... routing algorithm are asfollows.(1) Assume that there are k network nodes and all of them employ directional antennas to transmit data.(2) The transmit power of a transmitter varies based on the ... adversaries are not able to know the sourceand the destination from data packets. ASR considers the anonymity of addresses of the source and the destination in a packet but not the physical location...

Báo cáo hóa học: "Research Article Multiuser Detection Using Adaptive Multistage Matrix Wiener Filtering Schemes with Stage-Selection Criteria in DS-UWB" docx

... algorithm,presumably because of the use of a fuzzy variable stage inresponse to the time-varying fading channels. Also, theseresults show that the FI-MCG algorithm is able to accomplish a similar performance ... is the value at the location used in approximating the area under the aggregated MBF, and m(l)(M(l)(i)) ∈ [0, 1]indicates the MBF value at location M(l)(i). To reduce the computational ... eigen-decomposition. The feedforward and feedbackﬁlters of the MMWF-DFD receiver are capable of sharing the same calculation basis to alleviate the computationalC C. Hu and H Y. Lin 3where...

Báo cáo hóa học: " Research Article Event Detection Using “Variable Module Graphs” for Home Care Applications" potx

... constrain. In otherwords, only a subset of variables may be part of the constraintspace of a given expert. This leads to the graphs structure of a factor graph, where the edges between a factor ... output vari-able. Now, the question arises what we can say about the mes-sage sent to the input variable. If we really cannot modify the module to send a message to what was the input vari-able ... from all the othervariable nodes (except the one that we are sending the mes-sage to) to the factor function at the function node, andmarginalizing the product over all the other variables...

Báo cáo hóa học: " Research Article Integrated Detection, Tracking, and Recognition of Faces with Omnivideo Array in Intelligent Environments" pot

... are shown in Figure 6.3.1. Single-frame subspace feature analysis The single-frame subspace feature analysis we have applied is an alteration to the standard eigenface PCA method[11, 15]. The ... fast face searching is a crucial primer for face detection. It seeks all the possible faces in the captured imageregardless of poses, scales, and appearances of the faces.Once a face candidate ... major diﬀerences are as follows. (a) The eigenvector basis is generated by the correlation matrix of training faces instead of the covariance matrix, and (b) the projection vector of a test face...

Báo cáo hóa học: " Research Article Decentralized Detection in Wireless Sensor Networks with Channel Fading Statistics" potx

... motivates an alternative ap-proach: instead of minimizing the average error probability,one can first marginalize the channel transition probabilityfollowed by the application of standard channel ... can use the channel aware de-sign approach [ 9] that tends to the “averaged” transmissionchannel. The difference between this alternative approachand that of minimizing (7) is in the way that ... whereas the alterna-tive approach uses p(g) to obtain the marginalized channeltransition probability, thus enabling the direct application of the channel aware approach. This difference can also beexplained...

Báo cáo hóa học: " Research Article Some Shannon-McMillan Approximation Theorems for Markov Chain Field on the Generalized Bethe Tree" docx

... between the arbitrarymeasure and Markov measure on the generalized Bethe tree. As corollaries, a class of Shannon-McMillan theorems for arbitrary random fields and the Markov chains field on the generalized ... pagesdoi:10.1155/2011/470910 Research Article Some Shannon-McMillan ApproximationTheorems for Markov Chain Field on the Generalized Bethe TreeKangkang Wang1and Decai Zong21School of Mathematics and Physics, Jiangsu ... Journal of Inequalities and Applications 3Then μQwill be called a Markov chain field on the tree T determined by the stochastic matrixQ and the distribution q.Let μ be an arbitrary probability...

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