Search Results for author: An Chen

Found 21 papers, 0 papers with code

Knowledge-Reuse Transfer Learning Methods in Molecular and Material Science

no code implementations2 Mar 2024 An Chen, Zhilong Wang, Karl Luigi Loza Vidaurre, Yanqiang Han, Simin Ye, Kehao Tao, Shiwei Wang, Jing Gao, Jinjin Li

We focus on the application of transfer learning methods for the discovery of advanced molecules/materials, particularly, the construction of transfer learning frameworks for different systems, and how transfer learning can enhance the performance of models.

Transfer Learning

Striking the Balance: Life Insurance Timing and Asset Allocation in Financial Planning

no code implementations5 Dec 2023 An Chen, Giorgio Ferrari, Shihao Zhu

In contrast, in the second scenario with a controlled bequest amount, regardless of $\gamma$ values, immediate life insurance purchase proves to be optimal.

Sparsity-Based Channel Estimation Exploiting Deep Unrolling for Downlink Massive MIMO

no code implementations24 Sep 2023 An Chen, Wenbo Xu, Liyang Lu, Yue Wang

Massive multiple-input multiple-output (MIMO) enjoys great advantage in 5G wireless communication systems owing to its spectrum and energy efficiency.

Compressive Sensing

Zone-based Federated Learning for Mobile Sensing Data

no code implementations10 Mar 2023 Xiaopeng Jiang, Thinh On, NhatHai Phan, Hessamaldin Mohammadi, Vijaya Datta Mayyuri, An Chen, Ruoming Jin, Cristian Borcea

However, currently there is no mobile sensing DL system that simultaneously achieves good model accuracy while adapting to user mobility behavior, scales well as the number of users increases, and protects user data privacy.

Federated Learning Human Activity Recognition

Hardware-aware training for large-scale and diverse deep learning inference workloads using in-memory computing-based accelerators

no code implementations16 Feb 2023 Malte J. Rasch, Charles Mackin, Manuel Le Gallo, An Chen, Andrea Fasoli, Frederic Odermatt, Ning li, S. R. Nandakumar, Pritish Narayanan, Hsinyu Tsai, Geoffrey W. Burr, Abu Sebastian, Vijay Narayanan

Analog in-memory computing (AIMC) -- a promising approach for energy-efficient acceleration of deep learning workloads -- computes matrix-vector multiplications (MVMs) but only approximately, due to nonidealities that often are non-deterministic or nonlinear.

Optimal investment under partial information and robust VaR-type constraint

no code implementations8 Dec 2022 Nicole Bäuerle, An Chen

Partial information is characterized by the fact that the stock price itself is observable by the optimizing financial institution, but the outcome of the market price of the risk $\theta$ is unknown to the institution.

Vocal Bursts Type Prediction

Downlink Massive MIMO Channel Estimation via Deep Unrolling : Sparsity Exploitations in Angular Domain

no code implementations31 Oct 2022 An Chen, Wenbo Xu, Liyang Lu, Yue Wang

In frequency division duplex (FDD) massive MIMO systems, reliable downlink channel estimation is essential for the subsequent data transmission but is realized at the cost of massive pilot overhead due to hundreds of antennas at base station (BS).

Compressive Sensing Rolling Shutter Correction

FLSys: Toward an Open Ecosystem for Federated Learning Mobile Apps

no code implementations17 Nov 2021 Xiaopeng Jiang, Han Hu, Vijaya Datta Mayyuri, An Chen, Devu M. Shila, Adriaan Larmuseau, Ruoming Jin, Cristian Borcea, NhatHai Phan

This article presents the design, implementation, and evaluation of FLSys, a mobile-cloud federated learning (FL) system, which can be a key component for an open ecosystem of FL models and apps.

Data Augmentation Federated Learning +3

Intergenerational risk sharing in a Defined Contribution pension system: analysis with Bayesian optimization

no code implementations25 Jun 2021 An Chen, Motonobu Kanagawa, Fangyuan Zhang

We study a fully funded, collective defined-contribution (DC) pension system with multiple overlapping generations.

Bayesian Optimization

On the Investment Strategies in Occupational Pension Plans

no code implementations18 Apr 2021 Frank Bosserhoff, An Chen, Nils Sorensen, Mitja Stadje

Demographic changes increase the necessity to base the pension system more and more on the second and the third pillar, namely the occupational and private pension plans; this paper deals with Target Date Funds (TDFs), which are a typical investment opportunity for occupational pension planners.

Stochastic Optimization

Enhancing hierarchical surrogate-assisted evolutionary algorithm for high-dimensional expensive optimization via random projection

no code implementations1 Mar 2021 Xiaodong Ren, Daofu Guo, Zhigang Ren, Yongsheng Liang, An Chen

By remarkably reducing real fitness evaluations, surrogate-assisted evolutionary algorithms (SAEAs), especially hierarchical SAEAs, have been shown to be effective in solving computationally expensive optimization problems.

Evolutionary Algorithms

A Surrogate-Assisted Variable Grouping Algorithm for General Large Scale Global Optimization Problems

no code implementations19 Jan 2021 An Chen, Zhigang Ren, Muyi Wang, Yongsheng Liang, Hanqing Liu, Wenhao Du

SVG first designs a general-separability-oriented detection criterion according to whether the optimum of a variable changes with other variables.

Problem Decomposition

An Eigenspace Divide-and-Conquer Approach for Large-Scale Optimization

no code implementations5 Apr 2020 Zhigang Ren, Yongsheng Liang, Muyi Wang, Yang Yang, An Chen

Different from existing DC-based algorithms that perform decomposition and optimization in the original decision space, EDC first establishes an eigenspace by conducting singular value decomposition on a set of high-quality solutions selected from recent generations.

Evolutionary Algorithms

A Scoring Method for Driving Safety Credit Using Trajectory Data

no code implementations28 Nov 2018 Wenfu Wang, Weijie Yang, An Chen, Zhijie Pan

In order to manage the safety level of traffic system, we propose Driving Safety Credit inspired by credit score in financial security field, and design a scoring method using trajectory data and violation records.

Credit score General Classification

Enhancing Cooperative Coevolution for Large Scale Optimization by Adaptively Constructing Surrogate Models

no code implementations1 Mar 2018 Bei Pang, Zhigang Ren, Yongsheng Liang, An Chen

As for the nonseparable sub-problems, the surrogate models are employed to evaluate the corresponding sub-solutions, and the original simulation model is only adopted to reevaluate some good sub-solutions selected by surrogate models.

A Global Information Based Adaptive Threshold for Grouping Large Scale Global Optimization Problems

no code implementations1 Mar 2018 An Chen, Yi-Peng Zhang, Zhigang Ren, Yongsheng Liang, Bei Pang

On the one hand, by reducing the sensitivity of the indicator in DG to the roundoff error and the magnitude of contribution weight of subcomponent, we proposed a new indicator for two variables which is much more sensitive to their interaction.

Niching an Archive-based Gaussian Estimation of Distribution Algorithm via Adaptive Clustering

no code implementations1 Mar 2018 Yongsheng Liang, Zhigang Ren, Bei Pang, An Chen

As a model-based evolutionary algorithm, estimation of distribution algorithm (EDA) possesses unique characteristics and has been widely applied to global optimization.

Clustering

Surrogate Model Assisted Cooperative Coevolution for Large Scale Optimization

no code implementations27 Feb 2018 Zhigang Ren, Bei Pang, Yongsheng Liang, An Chen, Yi-Peng Zhang

It has been shown that cooperative coevolution (CC) can effectively deal with large scale optimization problems (LSOPs) through a divide-and-conquer strategy.

Enhancing Gaussian Estimation of Distribution Algorithm by Exploiting Evolution Direction with Archive

no code implementations25 Feb 2018 Yongsheng Liang, Zhigang Ren, Xianghua Yao, Zuren Feng, An Chen

This study first systematically analyses the reasons for the deficiency of the traditional GEDA, then tries to enhance its performance by exploiting its evolution direction, and finally develops a new GEDA variant named EDA2.

Optimal investment with time-varying stochastic endowments

no code implementations24 Jun 2014 Christoph Belak, An Chen, Carla Mereu, Robert Stelzer

For this, we argue that the value function is the unique viscosity solution of the Hamilton-Jacobi-Bellman (HJB) equation.

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