1,932 research outputs found
Hierarchically Fusing Long and Short-Term User Interests for Click-Through Rate Prediction in Product Search
Estimating Click-Through Rate (CTR) is a vital yet challenging task in
personalized product search. However, existing CTR methods still struggle in
the product search settings due to the following three challenges including how
to more effectively extract users' short-term interests with respect to
multiple aspects, how to extract and fuse users' long-term interest with
short-term interests, how to address the entangling characteristic of long and
short-term interests. To resolve these challenges, in this paper, we propose a
new approach named Hierarchical Interests Fusing Network (HIFN), which consists
of four basic modules namely Short-term Interests Extractor (SIE), Long-term
Interests Extractor (LIE), Interests Fusion Module (IFM) and Interests
Disentanglement Module (IDM). Specifically, SIE is proposed to extract user's
short-term interests by integrating three fundamental interests encoders within
it namely query-dependent, target-dependent and causal-dependent interest
encoder, respectively, followed by delivering the resultant representation to
the module LIE, where it can effectively capture user long-term interests by
devising an attention mechanism with respect to the short-term interests from
SIE module. In IFM, the achieved long and short-term interests are further
fused in an adaptive manner, followed by concatenating it with original raw
context features for the final prediction result. Last but not least,
considering the entangling characteristic of long and short-term interests, IDM
further devises a self-supervised framework to disentangle long and short-term
interests. Extensive offline and online evaluations on a real-world e-commerce
platform demonstrate the superiority of HIFN over state-of-the-art methods.Comment: accpeted by CIKM'22 as a Full Pape
3,4-DihyÂdroxyÂphenethyl acetate
In the title compound, C10H12O4, the dihedral angle between the acetate group and the aromatic ring is 20.47â
(10)°. In the crystal, molÂecules are linked by OâHâŻO hydrogen bonds, forming [001] chains. Weak CâHâŻO interÂactions consolidate the packing
Functional Coordination of the Chromatin-Remodeling Factor AtINO80 and the Histone Chaperones NRP1/2 in Inflorescence Meristem and Root Apical Meristem
Chromatin structure requires proper modulation in face of transcriptional reprogramming in the context of organism growth and development. Chromatin-remodeling factors and histone chaperones are considered to intrinsically possess abilities to remodel chromatin structure in single or in combination. Our previous study revealed the functional synergy between the Arabidopsis chromatin-remodeling factor INOSITOL AUXOTROPHY 80 (AtINO80) and the histone chaperone NAP1-RELATED PROTEIN 1 (NRP1) and NRP2 in somatic homologous recombination, one crucial pathway involved in repairing DNA double strand breaks. Here, we report genetic interplay between AtINO80 and NRP1/2 in regulating inflorescence meristem (IM) and root apical meristem (RAM) activities. The triple mutant atino80-5 m56-1 depleting of both AtINO80 (atino80-5) and NRP1/2 (m56-1) showed abnormal positioning pattern of floral primordia and enlargement of IM size. Higher mRNA levels of several genes involved in auxin pathway (e.g., PIN1, FIL) were found in the inflorescences of the triple mutant but barely in those of the single mutant atino80-5 or the double mutant m56-1. In particular, the depletion of AtINO80 and NRP1/2 decreased histone H3 levels within the chromatin regions of PIN1, which encodes an important auxin efflux carrier. Moreover, the triple mutant displayed a severe short-root phenotype with higher sensitivity to auxin transport inhibitor NPA. Unusual high level of cell death was also found in triple mutant root tips, accompanied by double-strand break damages revealed by Îł-H2A.X loci and cortex cell enlargement. Collectively, our study provides novel insight into the functional coordination of the two epigenetic factors AtINO80 and NRP1/2 in apical meristems during plant growth and development
The model for non-Abelian field topology for the multilayer fractional quantum anomalous Hall device
From the recent empirical discovery of the quantum anomalous Hall effect (QAHE), the interaction of the particle with spinâorbit coupling (SOC) plays an essential role in the cause of the QAHE, which includes three terms: external, internal, and chiral symmetric terms. Then, the non-Abelian quantum field theory was adopted to analyze and prove the conjecture on the causes that can lead to the fractional quantum Hall effect (FQHE). The spontaneously topological chiral symmetry breaking is the main contribution to the FQHE, which also includes two terms: the hopping of sublattice and Coulomb energy by the interaction of many-body particles. More generally, this exciton possesses an intermediate characteristic between the Wannier regimes and displays a peculiar two-dimensional wavefunction in the three-dimensional FQHE states. Finally, a bilayer three-dimensional model is proposed to implement the FQHE on the lattice by incorporating ferromagnetic dopants into three-dimensional topological insulative thin films. This study theoretically predicts the FQHE on the basis of other reports that have experimentally verified the rationality of the proposed model in magnetic topological insulators
Modeling Occasion Evolution in Frequency Domain for Promotion-Aware Click-Through Rate Prediction
Promotions are becoming more important and prevalent in e-commerce to attract
customers and boost sales, leading to frequent changes of occasions, which
drives users to behave differently. In such situations, most existing
Click-Through Rate (CTR) models can't generalize well to online serving due to
distribution uncertainty of the upcoming occasion. In this paper, we propose a
novel CTR model named MOEF for recommendations under frequent changes of
occasions. Firstly, we design a time series that consists of occasion signals
generated from the online business scenario. Since occasion signals are more
discriminative in the frequency domain, we apply Fourier Transformation to
sliding time windows upon the time series, obtaining a sequence of frequency
spectrum which is then processed by Occasion Evolution Layer (OEL). In this
way, a high-order occasion representation can be learned to handle the online
distribution uncertainty. Moreover, we adopt multiple experts to learn feature
representations from multiple aspects, which are guided by the occasion
representation via an attention mechanism. Accordingly, a mixture of feature
representations is obtained adaptively for different occasions to predict the
final CTR. Experimental results on real-world datasets validate the superiority
of MOEF and online A/B tests also show MOEF outperforms representative CTR
models significantly
ZRF1 Chromatin Regulators Have Polycomb Silencing and Independent Roles in Development
- âŠ