Specific Expert Learning: Enriching Ensemble Diversity via Knowledge Distillation.

In recent years, ensemble methods have shown sterling performance and gained popularity in visual tasks. However, the performance of an ensemble is limited by the paucity of diversity among the models. Thus, to enrich the diversity of the ensemble, we present the distillation approach-learning from experts (LFEs).

New steroidal glycosides from Hosta plantaginea (Lam.) Aschers.

Four new furostanol glycosides were isolated from the flowers of Hosta plantaginea (Lam.) Aschers. On the basis of spectroscopic methods including 1D and 2D NMR experiments, their structures were elucidated as 26-O-β-d-glucopyranosyl-(25R)-22-O-methyl-5α-furostan-2α,3β,22ξ,26-tetrol 3-O-α-l-rhamnopyranosyl-(1 → 4)-O-β-d-xylopyranosyl-(1 → 3)-[O-β-d-glucopyranosyl-(1 → 2)]-O-β-d-glucopyranosyl-(1 → 4)-β-d-galactopyranoside (hostaplantagineoside A, 1), 26-O-β-d-glucopyranosyl-(25R)-5α-furostan-20(22)-ene-2α,3β,26-triol-3-O-β-d-glucopyranosyl-(1 → 2)-[O-β-d-xylopyranosyl-(1 → 3)]-O-β-d-glucopyranosyl-(1 → 4)-β-d-galactopyranoside (hostaplantagineoside B, 2), 26-O-β-d-glucopyranosyl-(25R)-5α-furostan-22(23)-ene-2α,3β,20α,26-tetraol-3-O-β-d-glucopyranosyl-(1 → 2)-[O-β-d-xylopyranosyl-(1 → 3)]-O-β-d-glucopyranosyl-(1 → 4)-O-β-d-galactopyranoside (hostaplantagineoside C, 3), 26-O-β-d-glucopyranosyl-(25R)-5α-furostan-20(22)-ene-2α,3β,26-triol-3-O-α-l-rhamnopyranosyl-(1 → 4)-O-β-d-xylopyranosyl-(1 → 3)-[O-β-d-glucopyranosyl-(1 → 2)]-O-β-d-glucopyranosyl-(1 → 4)-β-d-galactopyranoside (hostaplantagineoside D, 4).

[Spatial and temporal distributions of rainfall erosivity in the Yanhe River Basin].

Rainfall erosivity (R) is a measure of effects of the rainfall factor on the potential capacity for soil water erosion. The characteristic of spatial and temporal of R value is the basis for soil erosion prediction. The spatial and temporal distributions of rainfall erosivity were analyzed using daily rainfall data collected between 1980 and 2003 from 22 rainfall stations located across the Yanhe River Basin.

[Clinical analysis of 255 dental crown fracture].

Objective: To analyse dental crown fracture occurrence situation in the long-term mastication process, and discuss the correlation factor of crown fracture occurrence.

Methods: From December, 2005 to December, 2007, 255 crown fracture teeth were chosen as the object of study. The sex, age, teeth position, fracture position and occlusal state of patients were analyzed.