Báo cáo hóa học: " Discriminative Feature Selection via Multiclass Variable Memory Markov Model" doc

... probability distribution (associated with each scalar variable) rather than a scalar value, resulting in a higher computational complexity as well as more memory space. However, this additional complexity ... in Section 5.2. Consider an arbitrary subgraph G  = (V  , E  ) V  ⊆ V, E  ⊆ E. An indicator variable, e l , is associated with each link defined as follows: e l =  1, l ∈ E  ,...

Ngày tải lên: 21/06/2014, 23:20

... features on the development set. The number of features rises to 4.7 million without feature selection, which iter- atively selects 100,000 features with best  2 norm values across shards. Feature ... shards. We compute the  2 norm of the weights in each feature column, sort features by this value, and keep K features in the model. This feature selection procedure is done after e...

Ngày tải lên: 19/02/2014, 19:20

... partitions, based on either feature types, word alignment types, or the domain of training data. In the feature- type-based partition, we split the ME features into 8 categories: • F1: Lexical features that ... etc. The feature weights are usually optimized with min- imum error rate training (MERT) as in (Och, 2003). Besides the MERT-based feature weight opti- mization, there exist oth...

Ngày tải lên: 17/03/2014, 00:20

... the model parameters was ensured by loading each observed variable on only one latent construct and by fixing the var- iance of each latent variable to one. The subsequent com- plete standardisation ... number of cases reported in the tables and in the text refers to weighted data and thus might deviate from the number of cases reported in the former description of the sample. Health and...

Ngày tải lên: 18/06/2014, 19:20

... RESEARCH Open Access Moving Target Indication via Three-Antenna SAR with Simplified Fractional Fourier Transform Wen-Qin Wang Abstract Ground ... only on a target’s Doppler rate but also on its across-track velocity component. Moreover, the selection of matched filte r length directly affects the measured ATI phase. These additional unknowns ... identification. Acknowledgements This work...

Ngày tải lên: 20/06/2014, 22:20

... of MIMO systems with antenna selection. IEEE Trans Wirel Commun. 4(4), 1759–1772 (2005) 10. I Berenguer, X Wang, V Krishnamurthy, Adaptive MIMO antenna selection via discrete stochastic optimization. ... Rx n t Ă 1 2 N t Ă 1 n r Ă 1 2 N r Ă s r Antenna selection & Beamforming Antenna selection & Beamforming Feedback H Figure 2 A 60 GHz MIMO system employing antenna selection...

Ngày tải lên: 21/06/2014, 01:20

... fabrication method of chemically derived graphene-based TCFs and demonstrated a huge potential of doping effect via charge transfer by conjugated organic molecules. All of the fabri- cation steps including the ... technique could be a potential alterna- tive to conventional transparent conductive materials. Abbreviations DMF: N,N-dimethylformamide; GO: graphene oxide; ITO: indium tin oxide;...

Ngày tải lên: 21/06/2014, 05:20