Ensemble models

Bài giảng Khai phá dữ liệu (Data mining): Ensemble models, chương này trình bày những nội dung về: introduction; voting; bagging; boosting; stacking and blending; learning ensembles; methods of constructing ensembles; bias-variance tradeoff; simple ensemble techniques;... Mời các bạn cùng tham khảo chi tiết nội dung bài giảng!

90p diepkhinhchau 18-09-2023 8 5   Download

We take a critical look at the relationship between the security of cryptographic schemes in the Random Oracle Model, and the security of the schemes that result from implementing the random oracle by so called \cryptographic hash functions". The main result of this paper is a negative one: There exist signature and encryption schemes that are secure in the Random Oracle Model, but for which any implementation of the random oracle results in insecure schemes.

37p tai_lieu2014 11-04-2014 66 7   Download

Conformational analysis of angiotensin I (AI) and II (AII) peptides has been performed through 2D 1 H-NMRspectro-scopy in dimethylsulfoxide and 2,2,2-trifluoroethanol/H2 O. The solution structural models of AI and AII have been determined in dimethylsulfoxide using NOE distance and 3 JHNHacoupling constants. Finally, theAI family of models resulting from restrained energy minimization (REM) refinement, exhibits pairwise rmsd values for the family ensemble 0.26 ± 0.13 A ˚,1.05 ± 0.23 A ˚, for backbone and heavy atoms, respectively, and the distance penalty function is calculated at 0.

11p fptmusic 16-04-2013 55 4   Download

Retinol-binding protein transports retinol, and circulates in the plasma as a macromolecular complex with the protein transthyretin. Under acidic con-ditions retinol-binding protein undergoes a transition to the molten globule state, and releases the bound retinol ligand. A biased molecular dynamics simulation method has been used to generate models for the ensemble of conformers populated within this molten globule state.

13p fptmusic 12-04-2013 42 3   Download