823 research outputs found
MACO: A Modality Adversarial and Contrastive Framework for Modality-missing Multi-modal Knowledge Graph Completion
Recent years have seen significant advancements in multi-modal knowledge
graph completion (MMKGC). MMKGC enhances knowledge graph completion (KGC) by
integrating multi-modal entity information, thereby facilitating the discovery
of unobserved triples in the large-scale knowledge graphs (KGs). Nevertheless,
existing methods emphasize the design of elegant KGC models to facilitate
modality interaction, neglecting the real-life problem of missing modalities in
KGs. The missing modality information impedes modal interaction, consequently
undermining the model's performance. In this paper, we propose a modality
adversarial and contrastive framework (MACO) to solve the modality-missing
problem in MMKGC. MACO trains a generator and discriminator adversarially to
generate missing modality features that can be incorporated into the MMKGC
model. Meanwhile, we design a cross-modal contrastive loss to improve the
performance of the generator. Experiments on public benchmarks with further
explorations demonstrate that MACO could achieve state-of-the-art results and
serve as a versatile framework to bolster various MMKGC models. Our code and
benchmark data are available at https://github.com/zjukg/MACO.Comment: This is the ArXiv version of our paper accepted by NLPCC 2023. The
code will be released soo
Proof-of-randomness protocol for blockchain consensus: the white paper version 1.0
A proof-of-randomness (PoR) protocol could be a fair and low energy-cost
consensus mechanism for blockchains. Each network node of a blockchain could
use a true random number generator (TRNG) and hash algorism to fulfil the PoR
protocol. In this whitepaper, we give the consensus mechanism of the PoR
protocol, and show how it could make the random numbers unforgeable. The PoR
protocol could generate a blockchain without any competition of computing power
or stake of cryptocurrency. Besides, we give some advantages of integrating
quantum random number generator (QRNG) chips in hardware wallets, and also
discuss the route to cooperate with quantum key distribution (QKD) technology.Comment: 7 pages, 1 figur
Observation of recoil-induced resonances and electromagnetically induced absorption of cold atoms in diffuse light
In this paper we report an experiment on the observation of the
recoil-induced resonances (RIR) and electromagnetically induced absorption
(EIA) of cold Rb87 atoms in diffuse light. The pump light of the RIR and the
EIA comes from the diffuse light in an integrating sphere, which also serves
the cooling light. The probe light beam is a weak laser split from the cooling
laser in order to keep the cooling and probe lasers correlated. We measured the
RIR and the EIA signal varying with the detuning of the diffuse laser light,
and also measured the temperature of the cold atoms at the different detunings.
The mechanism of RIR and EIA in the configuration with diffuse-light pumping
and laser probing is discussed, and the difference of nonlinear spectra of cold
atoms between in diffuse-light cooling system and in optical molasses as well
as in a magneto-optical trap (MOT) are studied.Comment: 9 pages, 6 figure
Making Large Language Models Perform Better in Knowledge Graph Completion
Large language model (LLM) based knowledge graph completion (KGC) aims to
predict the missing triples in the KGs with LLMs and enrich the KGs to become
better web infrastructure, which can benefit a lot of web-based automatic
services. However, research about LLM-based KGC is limited and lacks effective
utilization of LLM's inference capabilities, which ignores the important
structural information in KGs and prevents LLMs from acquiring accurate factual
knowledge. In this paper, we discuss how to incorporate the helpful KG
structural information into the LLMs, aiming to achieve structrual-aware
reasoning in the LLMs. We first transfer the existing LLM paradigms to
structural-aware settings and further propose a knowledge prefix adapter (KoPA)
to fulfill this stated goal. KoPA employs structural embedding pre-training to
capture the structural information of entities and relations in the KG. Then
KoPA informs the LLMs of the knowledge prefix adapter which projects the
structural embeddings into the textual space and obtains virtual knowledge
tokens as a prefix of the input prompt. We conduct comprehensive experiments on
these structural-aware LLM-based KGC methods and provide an in-depth analysis
comparing how the introduction of structural information would be better for
LLM's knowledge reasoning ability. Our code is released at
https://github.com/zjukg/KoPA.Comment: Working in progres
Target-oriented Sentiment Classification with Sequential Cross-modal Semantic Graph
Multi-modal aspect-based sentiment classification (MABSC) is task of
classifying the sentiment of a target entity mentioned in a sentence and an
image. However, previous methods failed to account for the fine-grained
semantic association between the image and the text, which resulted in limited
identification of fine-grained image aspects and opinions. To address these
limitations, in this paper we propose a new approach called SeqCSG, which
enhances the encoder-decoder sentiment classification framework using
sequential cross-modal semantic graphs. SeqCSG utilizes image captions and
scene graphs to extract both global and local fine-grained image information
and considers them as elements of the cross-modal semantic graph along with
tokens from tweets. The sequential cross-modal semantic graph is represented as
a sequence with a multi-modal adjacency matrix indicating relationships between
elements. Experimental results show that the approach outperforms existing
methods and achieves state-of-the-art performance on two standard datasets.
Further analysis has demonstrated that the model can implicitly learn the
correlation between fine-grained information of the image and the text with the
given target. Our code is available at https://github.com/zjukg/SeqCSG.Comment: ICANN 2023, https://github.com/zjukg/SeqCS
- …