Search Results for author: Hiroshi Kajino

Found 11 papers, 3 papers with code

Improving Molecular Properties Prediction Through Latent Space Fusion

1 code implementation20 Oct 2023 Eduardo Soares, Akihiro Kishimoto, Emilio Vital Brazil, Seiji Takeda, Hiroshi Kajino, Renato Cerqueira

Pre-trained Language Models have emerged as promising tools for predicting molecular properties, yet their development is in its early stages, necessitating further research to enhance their efficacy and address challenges such as generalization and sample efficiency.

Molecular Property Prediction Property Prediction

Classical Planning in Deep Latent Space

1 code implementation30 Jun 2021 Masataro Asai, Hiroshi Kajino, Alex Fukunaga, Christian Muise

Current domain-independent, classical planners require symbolic models of the problem domain and instance as input, resulting in a knowledge acquisition bottleneck.

A Differentiable Point Process with Its Application to Spiking Neural Networks

1 code implementation2 Jun 2021 Hiroshi Kajino

We develop a differentiable point process, which is the technical highlight of this paper, and apply it to derive the path-wise gradient estimator for SNNs.

Variational Inference

Variational Domain Adaptation

no code implementations ICLR 2019 Hirono Okamoto, Shohei Ohsawa, Itto Higuchi, Haruka Murakami, Mizuki Sango, Zhenghang Cui, Masahiro Suzuki, Hiroshi Kajino, Yutaka Matsuo

It reformulates the posterior with a natural paring $\langle, \rangle: \mathcal{Z} \times \mathcal{Z}^* \rightarrow \Real$, which can be expanded to uncountable infinite domains such as continuous domains as well as interpolation.

Bayesian Inference Domain Adaptation +2

Towards Stable Symbol Grounding with Zero-Suppressed State AutoEncoder

no code implementations27 Mar 2019 Masataro Asai, Hiroshi Kajino

We analyze the problem in Latplan both formally and empirically, and propose "Zero-Suppressed SAE", an enhancement that stabilizes the propositions using the idea of closed-world assumption as a prior for NN optimization.

Safe Exploration in Markov Decision Processes with Time-Variant Safety using Spatio-Temporal Gaussian Process

no code implementations12 Sep 2018 Akifumi Wachi, Hiroshi Kajino, Asim Munawar

This paper presents a learning algorithm called ST-SafeMDP for exploring Markov decision processes (MDPs) that is based on the assumption that the safety features are a priori unknown and time-variant.

Robot Navigation Safe Exploration

Molecular Hypergraph Grammar with its Application to Molecular Optimization

no code implementations8 Sep 2018 Hiroshi Kajino

Two fundamental challenges are: (i) it is not trivial to generate valid molecules in a controllable way due to hard chemical constraints such as the valency conditions, and (ii) it is often costly to evaluate a property of a novel molecule, and therefore, the number of property evaluations is limited.

Bayesian Optimization valid

Neuron as an Agent

no code implementations ICLR 2018 Shohei Ohsawa, Kei Akuzawa, Tatsuya Matsushima, Gustavo Bezerra, Yusuke Iwasawa, Hiroshi Kajino, Seiya Takenaka, Yutaka Matsuo

Existing multi-agent reinforcement learning (MARL) communication methods have relied on a trusted third party (TTP) to distribute reward to agents, leaving them inapplicable in peer-to-peer environments.

counterfactual Multi-agent Reinforcement Learning +3

Bidirectional learning for time-series models with hidden units

no code implementations ICML 2017 Takayuki Osogami, Hiroshi Kajino, Taro Sekiyama

Hidden units can play essential roles in modeling time-series having long-term dependency or on-linearity but make it difficult to learn associated parameters.

Time Series Time Series Analysis

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