Search Results for author: Zhichao Chen

Found 7 papers, 1 papers with code

FreDF: Learning to Forecast in Frequency Domain

no code implementations4 Feb 2024 Hao Wang, Licheng Pan, Zhichao Chen, Degui Yang, Sen Zhang, Yifei Yang, Xinggao Liu, Haoxuan Li, DaCheng Tao

Time series modeling is uniquely challenged by the presence of autocorrelation in both historical and label sequences.

Time Series

Coexistence of Mobile Broadband IMT Systems and UWB Keyless Entry Systems above 6.5 GHz

no code implementations31 Jan 2024 Carsten Monka-Ewe, Lukas Berkelmann, Richard Wolf, Jan Oliver Oelerich, Thorsten Schönfelder, Marco Kühnel, Zhichao Chen, Alin Stanescu, Oliver Kushova, Daniel Siekmann, Bert Jannsen

The ever-increasing need for spectrum for mobile broadband systems has led to the recent allocation of spectral resources for International Mobile Telecommunication (IMT) services in the upper mid band (6. 425 - 7. 125 GHz) at the World Radio Conference (WRC-23) as well as to the creation of an agenda item on identifying future IMT bands in the frequency region 7. 125 - 10. 5 GHz at WRC-27.

Monotonic Neural Ordinary Differential Equation: Time-series Forecasting for Cumulative Data

no code implementations23 Sep 2023 Zhichao Chen, Leilei Ding, Zhixuan Chu, Yucheng Qi, Jianmin Huang, Hao Wang

Time-Series Forecasting based on Cumulative Data (TSFCD) is a crucial problem in decision-making across various industrial scenarios.

Decision Making Time Series +1

TMoE-P: Towards the Pareto Optimum for Multivariate Soft Sensors

no code implementations21 Feb 2023 Licheng Pan, Hao Wang, Zhichao Chen, Yuxing Huang, Xinggao Liu

We further present a Task-aware Mixture-of-Experts framework for achieving the Pareto optimum (TMoE-P) in multi-variate soft sensor, which consists of a stacked OMoE module and a POR module.

Directed Acyclic Graphs With Tears

no code implementations4 Feb 2023 Zhichao Chen, Zhiqiang Ge

The basis of Bayesian network is structure learning which learns a directed acyclic graph (DAG) from data.

Fault Detection

Entire Space Counterfactual Learning: Tuning, Analytical Properties and Industrial Applications

no code implementations20 Oct 2022 Hao Wang, Zhichao Chen, Jiajun Fan, Yuxin Huang, Weiming Liu, Xinggao Liu

As a basic research problem for building effective recommender systems, post-click conversion rate (CVR) estimation has long been plagued by sample selection bias and data sparsity issues.

Auxiliary Learning counterfactual +2

ESCM$^2$: Entire Space Counterfactual Multi-Task Model for Post-Click Conversion Rate Estimation

1 code implementation3 Apr 2022 Hao Wang, Tai-Wei Chang, Tianqiao Liu, Jianmin Huang, Zhichao Chen, Chao Yu, Ruopeng Li, Wei Chu

In this paper, we theoretically demonstrate that ESMM suffers from the following two problems: (1) Inherent Estimation Bias (IEB), where the estimated CVR of ESMM is inherently higher than the ground truth; (2) Potential Independence Priority (PIP) for CTCVR estimation, where there is a risk that the ESMM overlooks the causality from click to conversion.

counterfactual Recommendation Systems +1

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