boosted minimum error rate training

... which have the potential problem of underfitting the training data. We present BoostedMERT, a novel boosting algorithm that uses Minimum Error Rate Training (MERT) as a weak learner and builds a re-ranker ... 2008. c 2008 Association for Computational Linguistics Beyond Log-Linear Models: Boosted Minimum Error Rate Training for N-best Re-ranking Kevin Duh ∗ Dept. of Electrical Engineering University ... HLT/NAACL. F.J. Och. 2003. Minimum error rate training in statistical machine translation. In ACL. R. E. Schapire and Y. Singer. 1999. Improved boosting algorithms using confidence-rated predictions....

Ngày tải lên: 23/03/2014, 17:20

... evaluation met- ric. Two popular techniques that incorporate the error criterion are Minimum Error Rate Train- ing (MERT) (Och, 2003) and Minimum Bayes- Risk (MBR) decoding (Kumar and Byrne, 2004). These ... Linguistics University of Maryland College Park, MD 20742, USA redpony@umd.edu Abstract Minimum Error Rate Training (MERT) and Minimum Bayes-Risk (MBR) decod- ing are used in most current state-of-the- art ... pages 163–171, Suntec, Singapore, 2-7 August 2009. c 2009 ACL and AFNLP Efficient Minimum Error Rate Training and Minimum Bayes-Risk Decoding for Translation Hypergraphs and Lattices Shankar Kumar 1 and...

Ngày tải lên: 23/03/2014, 16:21

... than using the MMI training criterion (with our method to define pseudo- references) and that optimizing error rate as part of the training criterion helps to obtain better error rate on unseen test ... over scores for individual sentences. 4 Training Criteria for Minimum Error Rate Training In the following, we assume that we can measure the number of errors in sentence by comparing it with ... 1 2 3 4 error count unsmoothed error count smoothed error rate (alpha=3) 9405 9410 9415 9420 9425 9430 9435 9440 9445 9450 -4 -3 -2 -1 0 1 2 3 4 error count unsmoothed error count smoothed...

Ngày tải lên: 23/03/2014, 19:20

... contains an error, the receiver rejects the ZERO BIT ERROR RATE Cabling infrastructure providers are following KRONE’s lead regarding the importance of having the lowest bit error rate possible. ... and cause an error. KRONE has selected a level 100 times lower than the worst case in the Standard and has called this BER condition of 10- 12 as ZERO BIT ERROR RATE. Zero Bit Error Rate (ZBER) ... plus others can all cause a bit error (eg. it is the reception of 0 when 1 was transmitted or vice versa). The Bit Error Rate (BER) is a measure of how often these errors occur. Statistical Method Some...

Ngày tải lên: 24/01/2014, 03:20

... 22 Jun 6.0000 Min Lending Rate CHANGES IN BANK RATE, MINIMUM LENDING RATE, MINIMUM BAND 1 DEALING RATE, REPO RATE AND OFFICIAL BANK RATE Date New effective rate % Bank Rate 1694 Oct 6.0000 1695 ... BANK RATE, MINIMUM LENDING RATE, MINIMUM BAND 1 DEALING RATE, REPO RATE AND OFFICIAL BANK RATE 1,2 Date New Date New Date New Date New Date New effective rate effective rate effective rate effective ... - Bank Rate, Minimum Lending rate, Repo Rate and Official Bank Rate are interest rates. The Minimum Band 1 Dealing Rate are discount rates. 2 - 16.9.92, UK leaves the European Exchange Rate Mechanism....

Ngày tải lên: 22/03/2014, 17:20

... our system. Current state-of-the-art recognizers exhibit word error rates (WER 1) for this corpus of approx- IThe word error rate (WEFt in %) is defined as follows: imately 30%-40% (Finke ... generate scores for an Nbest list reranking component. The results are promising, in that the best perfor- mance on a randomly selected test set is an absolute decrease in word error rate ... Chunk Based Partial Parsing of Spontaneous Speech in Unrestricted Domains for Reducing Word Error Rate in Speech Recognition Klaus Zechner and Alex Waibel Language Technologies Institute Carnegie...

Ngày tải lên: 23/03/2014, 19:20

... the frequency offset and channel estimation errors. For a fixed channel estimation variance error σ 2 ΔH , a larger variance of frequency offset estimation error, that is, σ 2 res , implies a higher ... pages doi:10.1155/2010/176083 Research Article Bit Error Rate Approximation of MIMO-OFDM Systems with Carrier Frequency Offset and Channel Estimation Errors Zhongshan Zhang, 1 Lu Zhang, 2 Mingli You, 2 and ... properly cited. The bit error rate (BER) of multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) systems with carrier frequency offset and channel estimation errors is analyzed...

Ngày tải lên: 21/06/2014, 11:20

... will develop our approach to compute the bit error rate of the chaos-based DS-CDMA system. 4.1. BER Analysis Approach. Inordertocomputethebit error rate, the moments of first- and second-order ... Processing Volume 2009, Article ID 571307, 12 pages doi:10.1155/2009/571307 Research Article Accurate Bit Error Rate Calculation for Asynchronous Chaos-Based DS-CDMA over Multipath Channel Georges Kaddoum, 1, ... 26 June 2009; Accepted 23 July 2009 Recommended by Kutluyil Dogancay An accurate approach to compute the bit error rate expression for multiuser chaosbased DS-CDMA system is presented in this paper....

Ngày tải lên: 21/06/2014, 20:20

... system receivers cannot be calculated analytically. The bit error rate (BER) is thus computed using the Monte Carlo (MC) simulation (Bit Error Counting). It is shown that if we wish to have reliable ... only 3000 samples, gives a value of the BER with an error of 0.2dB. 7. Conclusions In this paper, we have suggested a new iterative soft bit error rate estimation for the study of any digital communication system ... f X (x)  2  = 0. (12) Moreover, the optimal smoothing parameter h N is com- puted in the minimum of the Integrated Mean Squared Error (IMSE) sense. An approximation of the IMSE is given by the following formula:...

Ngày tải lên: 21/06/2014, 23:20

Ngày tải lên: 22/06/2014, 19:20

Ngày tải lên: 23/06/2014, 00:20

Ngày tải lên: 23/06/2014, 01:20

Ngày tải lên: 23/06/2014, 01:20

... non-regenerative AF MIMO-OFDM systems under channel estimation errors is investigated. Second-order moments of chan- nel estimation errors in the two hops are first deduced. Then based on the Bayesian ... compress-and-forward (CF). For AF strategy, the relay only amplifies and forwards the received signal from the source to the destination, without knowing what it has received. While for DF strategy, the relay will ... destination will be jointly designed. Both uplink and downlink scenarios are considered. Linear Minimum Mean-Square -Error Transceiver Design for Amplify-and-Forward Multiple Antenna Relaying Systems by Chengwen...

Ngày tải lên: 20/11/2012, 11:31

... and minimum error training in all three lan- guage pairs (p < 0.001, paired-sample permuta- tion test with 1000 replications). Minimum risk annealing generally outper- formed minimum error training ... Slove- nian, minimum risk annealing is significantly better than the other training methods, while minimum error is significantly worse. For Bulgarian, both minimum error and annealed min- imum risk training ... to training log-linear combinations of models for dependency parsing and for machine translation (§6). Finally, we note the connections of minimum risk training to max-margin training and minimum...

Ngày tải lên: 31/03/2014, 01:20

... results are illustrated with a set of numerical examples. Keywords: Cross-layer design, Minimum- length scheduling, Rate control, Stochastic shortest paths I. Introduction The problem of minimum- length ... transmission rates. This information can be captured by the K-dimensional rate vector r(t)=(r 1 (t), , r K (t)), where r k ( t)istherateof trans mitter k at slot t. If a transmitter is assigned a zero rate, ... optimized, but the transmission rates are fixed, and (3) th e transmission powers are fixed and each transmitter is allowed to choose its rate from a predetermined, finite set of rates, common to all transmitters....

Ngày tải lên: 20/06/2014, 22:20

... on optimal rate allocation and error resilient streaming on error prone channels such as packet erasure channel (PEC). The early studies on monoscopic video streaming mainly concentrate on nonlayered ... Processing 11 Table 3: Video encoder bit rates and Raptor encoder protection rates for “Rena” video. P e = 0.1 R C (Kbps) Encoder bit rates (Kbps) Protection rates (optimal) Proposed (optimal) EEP ... 0.216 0.000 Table 4: Video encoder bit rates and Raptor encoder protection rates for “Soccer” video. P e = 0.1 R C (Kbps) Encoder bit rates (Kbps) Protection rates (optimal) Proposed (optimal) EEP...

Ngày tải lên: 21/06/2014, 22:20

... on accurate transmission errors modeling at application level. The generated models allow refinement of error protection strategies. 3.1. MANET loss patterns generation The platform used to generate ... of errors), the transmission is often successful. The number of error- free bursts is lower than the number of error bursts, but this gap is compensated by the time spent in error- free state (error- free ... decoding rate (%) Successful decoding rate versus carrier to noise ratio 11 12 13 14 15 16 17 18 19 20 C/N (dB) Layered unequal error protection-Guo Dynamic FEC rate allocation scheme Equal error...

Ngày tải lên: 22/06/2014, 01:20

Ngày tải lên: 22/06/2014, 06:20

Ngày tải lên: 22/06/2014, 19:20