Search Results for author: Kien Do

Found 26 papers, 10 papers with code

Variational Flow Models: Flowing in Your Style

no code implementations5 Feb 2024 Kien Do, Duc Kieu, Toan Nguyen, Dang Nguyen, Hung Le, Dung Nguyen, Thin Nguyen

We introduce "posterior flows" - generalizations of "probability flows" to a broader class of stochastic processes not necessarily diffusion processes - and propose a systematic training-free method to transform the posterior flow of a "linear" stochastic process characterized by the equation Xt = at * X0 + st * X1 into a straight constant-speed (SC) flow, reminiscent of Rectified Flow.

Variational Inference

Revisiting the Dataset Bias Problem from a Statistical Perspective

no code implementations5 Feb 2024 Kien Do, Dung Nguyen, Hung Le, Thao Le, Dang Nguyen, Haripriya Harikumar, Truyen Tran, Santu Rana, Svetha Venkatesh

To overcome this challenge, we propose to approximate \frac{1}{p(u|b)} using a biased classifier trained with "bias amplification" losses.

Attribute

Domain Generalisation via Risk Distribution Matching

1 code implementation28 Oct 2023 Toan Nguyen, Kien Do, Bao Duong, Thin Nguyen

Hence, we propose a compelling proposition: Minimising the divergences between risk distributions across training domains leads to robust invariance for DG.

Beyond Surprise: Improving Exploration Through Surprise Novelty

1 code implementation9 Aug 2023 Hung Le, Kien Do, Dung Nguyen, Svetha Venkatesh

We present a new computing model for intrinsic rewards in reinforcement learning that addresses the limitations of existing surprise-driven explorations.

Atari Games Retrieval

Memory-Augmented Theory of Mind Network

no code implementations17 Jan 2023 Dung Nguyen, Phuoc Nguyen, Hung Le, Kien Do, Svetha Venkatesh, Truyen Tran

Social reasoning necessitates the capacity of theory of mind (ToM), the ability to contextualise and attribute mental states to others without having access to their internal cognitive structure.

Attribute

Causal Inference via Style Transfer for Out-of-distribution Generalisation

1 code implementation6 Dec 2022 Toan Nguyen, Kien Do, Duc Thanh Nguyen, Bao Duong, Thin Nguyen

A well-known existing causal inference method like back-door adjustment cannot be applied to remove spurious correlations as it requires the observation of confounders.

Causal Inference Image Classification +2

Face Swapping as A Simple Arithmetic Operation

1 code implementation19 Nov 2022 Truong Vu, Kien Do, Khang Nguyen, Khoat Than

We propose a novel high-fidelity face swapping method called "Arithmetic Face Swapping" (AFS) that explicitly disentangles the intermediate latent space W+ of a pretrained StyleGAN into the "identity" and "style" subspaces so that a latent code in W+ is the sum of an "identity" code and a "style" code in the corresponding subspaces.

Disentanglement Face Swapping

Momentum Adversarial Distillation: Handling Large Distribution Shifts in Data-Free Knowledge Distillation

no code implementations21 Sep 2022 Kien Do, Hung Le, Dung Nguyen, Dang Nguyen, Haripriya Harikumar, Truyen Tran, Santu Rana, Svetha Venkatesh

Since the EMA generator can be considered as an ensemble of the generator's old versions and often undergoes a smaller change in updates compared to the generator, training on its synthetic samples can help the student recall the past knowledge and prevent the student from adapting too quickly to new updates of the generator.

Data-free Knowledge Distillation

Black-box Few-shot Knowledge Distillation

1 code implementation25 Jul 2022 Dang Nguyen, Sunil Gupta, Kien Do, Svetha Venkatesh

Traditional KD methods require lots of labeled training samples and a white-box teacher (parameters are accessible) to train a good student.

Image Classification Knowledge Distillation

Defense Against Multi-target Trojan Attacks

no code implementations8 Jul 2022 Haripriya Harikumar, Santu Rana, Kien Do, Sunil Gupta, Wei Zong, Willy Susilo, Svetha Venkastesh

To defend against this attack, we first introduce a trigger reverse-engineering mechanism that uses multiple images to recover a variety of potential triggers.

Learning to Constrain Policy Optimization with Virtual Trust Region

no code implementations20 Apr 2022 Hung Le, Thommen Karimpanal George, Majid Abdolshah, Dung Nguyen, Kien Do, Sunil Gupta, Svetha Venkatesh

We introduce a constrained optimization method for policy gradient reinforcement learning, which uses a virtual trust region to regulate each policy update.

Atari Games Policy Gradient Methods

Learning Theory of Mind via Dynamic Traits Attribution

no code implementations17 Apr 2022 Dung Nguyen, Phuoc Nguyen, Hung Le, Kien Do, Svetha Venkatesh, Truyen Tran

Inspired by the observation that humans often infer the character traits of others, then use it to explain behaviour, we propose a new neural ToM architecture that learns to generate a latent trait vector of an actor from the past trajectories.

Future prediction Inductive Bias +1

Episodic Policy Gradient Training

1 code implementation3 Dec 2021 Hung Le, Majid Abdolshah, Thommen K. George, Kien Do, Dung Nguyen, Svetha Venkatesh

We introduce a novel training procedure for policy gradient methods wherein episodic memory is used to optimize the hyperparameters of reinforcement learning algorithms on-the-fly.

Policy Gradient Methods Scheduling

Semantic Host-free Trojan Attack

no code implementations26 Oct 2021 Haripriya Harikumar, Kien Do, Santu Rana, Sunil Gupta, Svetha Venkatesh

In this paper, we propose a novel host-free Trojan attack with triggers that are fixed in the semantic space but not necessarily in the pixel space.

Clustering by Maximizing Mutual Information Across Views

no code implementations ICCV 2021 Kien Do, Truyen Tran, Svetha Venkatesh

We propose a novel framework for image clustering that incorporates joint representation learning and clustering.

Clustering Image Clustering +1

Unsupervised Anomaly Detection on Temporal Multiway Data

no code implementations20 Sep 2020 Duc Nguyen, Phuoc Nguyen, Kien Do, Santu Rana, Sunil Gupta, Truyen Tran

These include the capacity of the compact matrix LSTM to compress noisy data near perfectly, making the strategy of compressing-decompressing data ill-suited for anomaly detection under the noise.

Unsupervised Anomaly Detection

Theory and Evaluation Metrics for Learning Disentangled Representations

2 code implementations ICLR 2020 Kien Do, Truyen Tran

We make two theoretical contributions to disentanglement learning by (a) defining precise semantics of disentangled representations, and (b) establishing robust metrics for evaluation.

Disentanglement Informativeness

Graph Transformation Policy Network for Chemical Reaction Prediction

no code implementations22 Dec 2018 Kien Do, Truyen Tran, Svetha Venkatesh

We address a fundamental problem in chemistry known as chemical reaction product prediction.

Chemical Reaction Prediction

DeepProcess: Supporting business process execution using a MANN-based recommender system

1 code implementation3 Feb 2018 Asjad Khan, Hung Le, Kien Do, Truyen Tran, Aditya Ghose, Hoa Dam, Renuka Sindhgatta

Process-aware Recommender systems can provide critical decision support functionality to aid business process execution by recommending what actions to take next.

Activity Prediction Recommendation Systems

Knowledge Graph Embedding with Multiple Relation Projections

no code implementations26 Jan 2018 Kien Do, Truyen Tran, Svetha Venkatesh

Knowledge graphs contain rich relational structures of the world, and thus complement data-driven machine learning in heterogeneous data.

Knowledge Graph Embedding Knowledge Graphs +3

Learning Deep Matrix Representations

no code implementations4 Mar 2017 Kien Do, Truyen Tran, Svetha Venkatesh

We derive several new deep networks: (i) feed-forward nets that map an input matrix into an output matrix, (ii) recurrent nets which map a sequence of input matrices into a sequence of output matrices.

EEG Face Reconstruction +2

Multilevel Anomaly Detection for Mixed Data

no code implementations20 Oct 2016 Kien Do, Truyen Tran, Svetha Venkatesh

We propose MIXMAD, which stands for MIXed data Multilevel Anomaly Detection, an ensemble method that estimates the sparse regions across multiple levels of abstraction of mixed data.

Unsupervised Anomaly Detection

Outlier Detection on Mixed-Type Data: An Energy-based Approach

1 code implementation17 Aug 2016 Kien Do, Truyen Tran, Dinh Phung, Svetha Venkatesh

We evaluate the proposed method on synthetic and real-world datasets and demonstrate that (a) a proper handling mixed-types is necessary in outlier detection, and (b) free-energy of Mv. RBM is a powerful and efficient outlier scoring method, which is highly competitive against state-of-the-arts.

Outlier Detection Vocal Bursts Type Prediction

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