Search Results for author: Chen Qiu

Found 24 papers, 13 papers with code

A Multilingual Benchmark for Probing Negation-Awareness with Minimal Pairs

1 code implementation CoNLL (EMNLP) 2021 Mareike Hartmann, Miryam de Lhoneux, Daniel Hershcovich, Yova Kementchedjhieva, Lukas Nielsen, Chen Qiu, Anders Søgaard

Negation is one of the most fundamental concepts in human cognition and language, and several natural language inference (NLI) probes have been designed to investigate pretrained language models’ ability to detect and reason with negation.

Natural Language Inference Negation

Decision Theory for Treatment Choice Problems with Partial Identification

no code implementations29 Dec 2023 José Luis Montiel Olea, Chen Qiu, Jörg Stoye

We apply classical statistical decision theory to a large class of treatment choice problems with partial identification, revealing important theoretical and practical challenges but also interesting research opportunities.

Feasibility Conditions for Mobile LiFi

no code implementations20 Dec 2023 Shuai Ma, Haihong Sheng, Junchang Sun, Hang Li, Xiaodong Liu, Chen Qiu, Majid Safari, Naofal Al-Dhahir, Shiyin Li

Then, we derive the expression of LiFi transmission rate based on the m-pulse-amplitude-modulation (M-PAM).

Model Selection of Zero-shot Anomaly Detectors in the Absence of Labeled Validation Data

no code implementations16 Oct 2023 Clement Fung, Chen Qiu, Aodong Li, Maja Rudolph

In this work, we propose SWSA (Selection With Synthetic Anomalies): a general-purpose framework to select image-based anomaly detectors with a generated synthetic validation set.

Model Selection Unsupervised Anomaly Detection +1

Treatment Choice, Mean Square Regret and Partial Identification

no code implementations10 Oct 2023 Toru Kitagawa, Sokbae Lee, Chen Qiu

We consider a decision maker who faces a binary treatment choice when their welfare is only partially identified from data.

Text-driven Prompt Generation for Vision-Language Models in Federated Learning

no code implementations9 Oct 2023 Chen Qiu, Xingyu Li, Chaithanya Kumar Mummadi, Madan Ravi Ganesh, Zhenzhen Li, Lu Peng, Wan-Yi Lin

Prompt learning for vision-language models, e. g., CoOp, has shown great success in adapting CLIP to different downstream tasks, making it a promising solution for federated learning due to computational reasons.

Federated Learning Image Classification

Joint Data Collection and Sensor Positioning in Multi-UAV-Assisted Wireless Sensor Network

no code implementations14 Aug 2023 Mingyue Zhu, Zhiqing Wei, Chen Qiu, Wangjun Jiang, Huici Wu, Zhiying Feng

Firstly, the block coordinate descent (BCD) and successive convex approximation (SCA) techniques are applied to iteratively optimize the trajectory of the main UAV and the sensor transmission schedule, so as to maximize the minimum amount of data uploaded by the sensor.

Position

The Role of Data Curation in Image Captioning

1 code implementation5 May 2023 Wenyan Li, Jonas F. Lotz, Chen Qiu, Desmond Elliott

Image captioning models are typically trained by treating all samples equally, neglecting to account for mismatched or otherwise difficult data points.

Few-Shot Learning Image Captioning +2

Deep Anomaly Detection under Labeling Budget Constraints

1 code implementation15 Feb 2023 Aodong Li, Chen Qiu, Marius Kloft, Padhraic Smyth, Stephan Mandt, Maja Rudolph

Selecting informative data points for expert feedback can significantly improve the performance of anomaly detection (AD) in various contexts, such as medical diagnostics or fraud detection.

Anomaly Detection Fraud Detection

Intelligent Reflecting Surface assisted Integrated Sensing and Communication System

no code implementations11 Nov 2022 Zhiqing Wei, Xinyi Yang, Chunwei Meng, Xiaoyu Yang, Kaifeng Han, Chen Qiu, Huici Wu

This paper proves the efficiency of IRS enabled ISAC system, which motivates the implementation of IRS to enhance the sensing capability in ISAC system.

Graph Neural Networks for Distributed Power Allocation in Wireless Networks: Aggregation Over-the-Air

1 code implementation18 Jul 2022 Yifan Gu, Changyang She, Zhi Quan, Chen Qiu, Xiaodong Xu

In this paper, we aim to design low signaling overhead distributed power allocation schemes by using graph neural networks (GNNs), which are scalable to the number of wireless links.

Graph Embedding

Enabling Harmonious Human-Machine Interaction with Visual-Context Augmented Dialogue System: A Review

no code implementations2 Jul 2022 Hao Wang, Bin Guo, Yating Zeng, Yasan Ding, Chen Qiu, Ying Zhang, Lina Yao, Zhiwen Yu

The intelligent dialogue system, aiming at communicating with humans harmoniously with natural language, is brilliant for promoting the advancement of human-machine interaction in the era of artificial intelligence.

Raising the Bar in Graph-level Anomaly Detection

1 code implementation27 May 2022 Chen Qiu, Marius Kloft, Stephan Mandt, Maja Rudolph

Graph-level anomaly detection has become a critical topic in diverse areas, such as financial fraud detection and detecting anomalous activities in social networks.

Anomaly Detection Fraud Detection +1

Treatment Choice with Nonlinear Regret

no code implementations17 May 2022 Toru Kitagawa, Sokbae Lee, Chen Qiu

The literature focuses on the mean of welfare regret, which can lead to undesirable treatment choice due to sensitivity to sampling uncertainty.

regression

Latent Outlier Exposure for Anomaly Detection with Contaminated Data

1 code implementation16 Feb 2022 Chen Qiu, Aodong Li, Marius Kloft, Maja Rudolph, Stephan Mandt

We propose a strategy for training an anomaly detector in the presence of unlabeled anomalies that is compatible with a broad class of models.

Anomaly Detection Video Anomaly Detection

Detecting Anomalies within Time Series using Local Neural Transformations

1 code implementation8 Feb 2022 Tim Schneider, Chen Qiu, Marius Kloft, Decky Aspandi Latif, Steffen Staab, Stephan Mandt, Maja Rudolph

We develop a new method to detect anomalies within time series, which is essential in many application domains, reaching from self-driving cars, finance, and marketing to medical diagnosis and epidemiology.

Anomaly Detection Epidemiology +5

Switching Recurrent Kalman Networks

no code implementations16 Nov 2021 Giao Nguyen-Quynh, Philipp Becker, Chen Qiu, Maja Rudolph, Gerhard Neumann

In addition, driving data can often be multimodal in distribution, meaning that there are distinct predictions that are likely, but averaging can hurt model performance.

Autonomous Driving Time Series +1

On Language Models for Creoles

1 code implementation CoNLL (EMNLP) 2021 Heather Lent, Emanuele Bugliarello, Miryam de Lhoneux, Chen Qiu, Anders Søgaard

Creole languages such as Nigerian Pidgin English and Haitian Creole are under-resourced and largely ignored in the NLP literature.

Neural Transformation Learning for Deep Anomaly Detection Beyond Images

3 code implementations30 Mar 2021 Chen Qiu, Timo Pfrommer, Marius Kloft, Stephan Mandt, Maja Rudolph

Data transformations (e. g. rotations, reflections, and cropping) play an important role in self-supervised learning.

Anomaly Detection Self-Supervised Learning +2

Variational Dynamic Mixtures

no code implementations20 Oct 2020 Chen Qiu, Stephan Mandt, Maja Rudolph

Deep probabilistic time series forecasting models have become an integral part of machine learning.

Probabilistic Time Series Forecasting Time Series

Learning Topometric Semantic Maps from Occupancy Grids

1 code implementation10 Jan 2020 Markus Hiller, Chen Qiu, Florian Particke, Christian Hofmann, Jörn Thielecke

Today's mobile robots are expected to operate in complex environments they share with humans.

Rewarding Coreference Resolvers for Being Consistent with World Knowledge

1 code implementation IJCNLP 2019 Rahul Aralikatte, Heather Lent, Ana Valeria Gonzalez, Daniel Hershcovich, Chen Qiu, Anders Sandholm, Michael Ringaard, Anders Søgaard

Unresolved coreference is a bottleneck for relation extraction, and high-quality coreference resolvers may produce an output that makes it a lot easier to extract knowledge triples.

reinforcement-learning Reinforcement Learning (RL) +3

Cannot find the paper you are looking for? You can Submit a new open access paper.