error estimation and hp adaptive mesh refinement for discontinuous galerkin methods tobias leicht and ralf hartmann
frequency domain numerical modelling of visco acoustic waves based on finite difference and finite element discontinuous galerkin methods
... equilateral mesh for the P0 interpolation, 10 cells per local wavelength on unstructured triangular mesh for the P1 interpolation and cells per local wavelength on unstructured triangular mesh for the ... Waves with Finite-Difference and Finite-Element Discontinuous Galerkin Methods 129 Although the numerical methods presented in this study were originally developed for seismic applications, they ... solutions of the equation for multiple sources The LU decomposition of A is a time and memory demanding task but is independent of the source, and, therefore is performed only once, while the...
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Báo cáo hóa học: "Research Article Sequential and Adaptive Learning Algorithms for M-Estimation" ppt
... calculate wn using (15) and update An using (18) On the other hand, if there is no close form solution for en or the solution is very complicated, then we can use (21) and (22) 2.3 Specific algorithms ... algorithm for the M-estimate of a linear observation model Our development is based on formulating the problem from a Bayesian perspective and using a Gaussian approximation for the posterior and likelihood ... = en , b = T xn An−1 xn (b > 0) and ψ(x) = ρ (x) We note that for the penalty functions ρ(x) used for M -estimation, we have the following: ψ(−x) = −ψ(x), ψ(0) = and ψ(|x|) ≥ Let x0 be a solution...
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Báo cáo khoa học: "Fast Online Training with Frequency-Adaptive Learning Rates for Chinese Word Segmentation and New Word Detection" docx
... 1, i, i + and i + • Character bigrams locating at positions i − 2, i − 1, i and i + • Whether xj and xj+1 are identical, for j = i − 2, , i + • Whether xj and xj+2 are identical, for j = i ... gradient information, which is costly and complicated Our ADF training method is based on feature frequency adaptation, and there is no prior work on using feature frequency information for accelerating ... word bigram candidate [xj,i , xi+1,k ] hits a word bigram [wi , wj ] ∈ B, and satisfies the aforementioned constraints on j and k We also employ the traditional character-based features For each label...
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báo cáo hóa học: "A Dynamic Neuro-Fuzzy Model Providing Bio-State Estimation and Prognosis Prediction for Wearable Intelligent Assistants" pptx
... doses (for general joint and skeletal health, for pain from arthritis, and for spasticity), and three types of activities suggested by her former therapist (walking/cycling, hand operation, and ... the mass and concentration in the gut are m and C and in the blood are m and C , the diffusion constant between the gut and blood is K , and the constants of M-M kinetics are V max and K m , ... define and implement homeostatic states; and This paper presents this refined structure, with a special focus on two areas of special interest for WIAs: state estimation for context-awareness and...
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Báo cáo hóa học: " A new and efficient adaptive scheduling packets for the uplink traffic in WiMAX networks" ppt
... of the bandwidth for the polling processes In addition, the scheduler must guarantee the requirements of limited maximum delay for the rtPS service and the minimal bandwidth for the rtPS and nrtPS ... met 3.2.2 Ensuring minimal bandwidth for rtPS and nrtPS services The scheduler ensures the minimal bandwidth for rtPS and nrtPS services in accordance with the minimum bandwidth requirement per ... following parameters: the information about the MCSs used for the sending packets between the SS and the BS; the information about the BW-REQ messages sent by the SSs and the information about the polling...
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Báo cáo hóa học: " Error analysis and implementation considerations of decoding algorithms for time-encoding machine" ppt
... the major error contributors are the basis approximation error and the numerical computation errors, including the matrix inversion errors and the matrix boundary problems Since these errors come ... coefficient matrix Page of the reconstruction error as in other methods, although to a less extent The gain of the Vandermonde formulation and formulating other methods in a similar fashion will be an ... transition band But expanding the basis in time corresponds to reducing bandwidth Hence, the Gaussian basis typically requires higher OSR than the other two bases for the same recovery error Basis...
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Báo cáo sinh học: " Research Article Iterative Frequency-Domain Channel Estimation and Equalization for Ultra-Wideband Systems with Short Cyclic Prefix" pot
... uncertainties such as the synchronization errors, channel estimation errors , and as well as the derivation of analytical performance bounds for the channel estimation and equalization with IBI cancellation ... Receiver performance over different channel models, for CP = and channel estimation with pilot blocks when the channel estimation is performed with the IBI cancellation, the reduction in IBI for CP ... term and the cancellation operations requires 3N real products and 4N real additions Finally one recursion of the channel estimation algorithms employs 22N products and 15N additions for FD-RLS and...
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Báo cáo hóa học: "Research Article Linearly Time-Varying Channel Estimation and Symbol Detection for OFDMA Uplink Using " potx
... symbols We also present a performance analysis of the channel estimation approach and derive a closed-form expression for the channel estimation variances It is shown that the estimation variances, ... training methods [12–14] where channel estimation can only be performed within each subband of individual user, separately Channel Estimation Analysis In this section, we analyze the performance ... the other hand, estimation variance due to the information sequence interference (the first term in (29)) may be the dominant component of the channel estimation error, especially for high SNR...
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Báo cáo hóa học: " Research Article An Energy-Efficient Adaptive Modulation Suitable for Wireless Sensor Networks with SER and Throughput Constraints" ppt
... pp 1–5, Helsinki, Finland, September 2006 IEEE Std 802.15.4-2003, IEEE Standard for Information technology—telecommunications and information exchange between systems—local and metropolitan area ... fixed TDMA and variable length TDMA with 16-QAM modulation, N = 896 symbol periods for transmission is the ISM band (2.4 GHz), defined as the primary band for this type of networks The bandwidth ... a and b correspond to parameters for LOS (line of sight) scenario in the ISM band (2.4 GHz) in indoor environment The height of antennas is assumed to be m for the receiver and between 1–3 m for...
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Báo cáo hóa học: " Research Article Carrier Frequency Offset Estimation and I/Q Imbalance Compensation for OFDM Systems" pot
... (34) i where yii and yq are the inphase and quadrature components of received information signal, and sii and siq the inphase and quadrature components of the transmitted information signal Note ... frequency offset and I/Q imbalance is first addressed A frequency estimation algorithm and an I/Q imbalance compensation scheme are then derived The proposed estimation methods are also analyzed and computer ... imbalance estimation stage Figures and show, respectively, the average and the MSE plots of the estimates of U and V as a function of the number of short symbols used for the I/Q imbalance estimation, ...
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Báo cáo hóa học: " Multipass Channel Estimation and Joint Multiuser Detection and Equalization for MIMO Long-Code DS/CDMA Systems" potx
... proposed, formerly for single-user systems [13, 14], and then for multiuser systems [15, 16] In particular, the paper [16] develops subspace-based blind adaptive multiuser detectors for short-code ... theoretical performance analysis of the proposed iterative strategy, which leads to a closed-form formula relating the mean square channel estimation error at each iteration with the error probability ... numerical results, we provide a theoretical analysis and derive an approximate closed-form formula for the channel estimation mean square error (CEMSE) at a given iteration of the multipass strategy...
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Báo cáo hóa học: "Motion Estimation and Signaling Techniques for 2D+t Scalable Video Coding" doc
... on Circuits and Systems for Video Technology, vol 14, no 10, pp 1183–1194, 2004 [6] A Secker and D Taubman, “Lifting-based invertible motion adaptive transform (LIMAT) framework for highly scalable ... the memory bandwidth and the computational complexity according to the complete-to-overcomplete (CODWT) algorithm described in [20] 2.1 Fast in-band motion estimation The wavelet in-band prediction ... of the aperture is indeed a problem for traditional motion estimation methods, but in the proposed motion estimation algorithm we take advantage of this fact For the sake of clarity, let us consider...
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Báo cáo hóa học: " Fast Motion Estimation and Intermode Selection for H.264" pptx
... intermediate coefficients y(1) and y(4) become the coefficients for the H0 layer In the second step, X(0) and X(1) become the coefficients for the L2 and H1 layers, respectively For MRME, the resultant ... function) For each ¢ sub-MB, check if it is homogeneous No Select intermodes 5, 6, and as candidate modes Yes For each 16 ¢ 16 sub-MB, check if it is homogeneous No Select intermodes 2, 3, and as candidate ... Zeng, and M L Liou, “A new three-step search algorithm for block motion estimation, ” IEEE Transactions on Circuits and Systems for Video Technology, vol 4, no 4, pp 438– 442, 1994 8 [5] L.-M Po and...
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Báo cáo hóa học: " Channel Estimation and Data Detection for MIMO Systems under Spatially and Temporally Colored Interference" potx
... consider the case of one interferer and large SNR and assess the benefits of taking temporal and/ or spatial interference correlation into account for channel estimation and data detection We then examine ... algorithm serves as a performance benchmark when temporal and spatial interference correlation are exploited in joint channel estimation and data detection We also assess the performance improvement ... Applied Signal Processing the receiver, ordered zero-forcing (ZF) and minimum meansquared error (MMSE) detection were studied for both spatially and temporally white interference in [4, 16], respectively...
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Báo cáo hóa học: " An Evolutionary Approach for Joint Blind Multichannel Estimation and Order Detection" pptx
... function which may be Gaussian or uniform, and µ and σ are the related mean and variance In this paper, we use normal mutation for the order genes That is, we randomly alter the genes from to or ... is not true Therefore, the channel order must be estimated beforehand In this paper, we estimate the channel order based on (12) Since An Evolutionary Approach for Blind Channel Estimation the ... such premature convergence For the parameter part, a uniform PDF is employed Let a3 , a4 ∈ [1, T] be two random integers (a3 < a4 ), and let βa3 +1 , , βa4 be a4 − a3 random real numbers between...
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Báo cáo hóa học: " Source and Channel Adaptive Rate Control for Multicast Layered Video Transmission Based on a Clustering " pdf
... constituted of the LR and the goodput and the second constituted of the LR and the throughput of a conformant TCP (transport control protocol) connection under similar loss and round-trip time ... one constituted of the LR and the goodput (cf Section 4.1) and the second constituted of the LR and a TCP-compatible bandwidth share measure (cf Section 4.2) Both LR and bandwidth characteristics ... measure between two observed reports x and y (d(x, y)) and between an observed report x and a cluster C (d(x, C)) The former similarity measure can stand for the simple L p distance (d(x, y) =...
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Báo cáo y học: " Comparison of postoperative pulmonary function and air leakage between pleural closure vs. mesh-cover for intersegmental plane in segmentectomy" pot
... PGA mesh and fibrin glue (mesh- cover) (Figure 1c) The pleural closure and mesh- cover groups respectively included 61 and 36 patients (Table 1) Pulmonary Function Tests Vital capacity (VC), forced ... between the pleural closure and mesh- cover methods is important Since April 2005, the authors have conducted segmentectomy for c-T1N0M0 NSCLC, metastatic lung tumors and other lung nodules [10,11] ... between the pleural closure and mesh- cover groups, as shown in Table In the pleural closure group, the respective mean values of FEV before and after surgery were 2.1 ± 0.6 and 1.9 ± 0.5 l, of which...
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Báo cáo sinh học: "Prediction error variance and expected response to selection, when selection is based on the best predictor for Gaussian and threshold characters, traits following a Poisson mixed model and survival traits" potx
... central role in the formulas for PEV or PEVunbiased , and therefore also in formulas for reliability (or ρ2 unbiased ) and accuracy of selection (which are derived from formulas for PEV or PEVunbiased ... sometimes use lower case letters (e.g and a) for a random variable or a random vector, and sometimes for a specific value of the random variable or the random vector The interpretation should ... in A1 and exactly those females in A2 are selected, that is, the probability that aibp ≥ t1 for all ˆ bp bp i ∈ A1 , and < t1 for all i ∈ F\A1 , and ≥ t2 for all i ∈ A2 and aibp < t2 ˆ ˆ ˆ for...
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Design and Simulation of Adaptive Speed Control for SMO-Based Sensorless PMSM Drive
... respectively performs the function of speed estimation and speed loop adaptive PI controller, the function of current controller and coordinate transformation (CCCT) and SVPWM, and the function ... proposed adaptive PI control in sensorless PMSM drive In this two Figs., the Kp and Ki are respectively set with 1500 (Q15 format) and 30 (Q15 format) at the initial condition; then Kp and Ki will ... estimator and the adaptive PI controller algorithm are only 2.88s and 6.48s, respectively In controller performance aspect, some simulation results show that the proposed adaptive PI controller for...
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Bayesian optimization for image segmentation, texture flow estimation and image deblurring
... his insightful discussions on several topics and projects, for his helpfulness, for his encouragement, and for his instructions on both the technical and non-technical aspects of my Ph.D training ... the observations follow the identical and independent distribution (iid) and the estimation errors following Gaussian distribution with zero mean and standard derivation σ Also, we assume that ... color and texture is modeled using a mixture of Gaussians in a six-dimensional space (three dimensions for color and three for texture) Because the grouping is performed in a 6D space and no...
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