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<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Ya-Chien Chang, UCSD</title>
<script src='js/jquery-1.11.2.min.js'></script>
<script src='js/bootstrap.min.js'></script>
<link href='css/bootstrap.min.css' rel='stylesheet'>
<link rel="icon" href="images/UCSDLogo.png">
<link href='http://fonts.googleapis.com/css?family=Roboto:400,500,700,900,100italic,100,300,300italic,400italic,500italic,900italic,700italic' rel='stylesheet' type='text/css'>
<meta name="description" content="I am a PhD student in Computer Science and Engineering Department at UC San Diego. My advisor is Professor Sicun Gao, and we are currently working on control and planning problems in robotics"/>
<style>
body {
font-family: 'sans-serif';
font-size: 18px;
background-color: #FFFCF4;
color: #4F6071;
line-height: 1.4;
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.color1 {
background-color: #CCC;
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#header {
width: 100%;
height: 360px;
background-color: #C0BBAB;
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#header-inner {
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
height: 100%;
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.img-me {
border: 0;
float: left;
height: 200px;
}
.header-text {
margin-top: 20px;
text-align: center;
}
#contact-info {
margin-top: 20px;
background-color: #EEE;
padding: 10px;
text-align: center;
}
.header-text-name {
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font-size: 40px;
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.header-text-email {
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.paper-title {
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.paper-authors {
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</style>
</head>
<body>
<div id='header'>
<div id='header-inner'>
<img src='images/me.jpg' alt= 'Ya-Chien Chang' class='img-circle img-me'>
<div class='header-text'>
<div class='header-text-name'>
Ya-Chien Chang
</div>
<div class='header-text-email'>
yac021 at ucsd dot edu
</div>
</div>
</div>
</div>
<div class='container'>
<div class='col-xs-10 col-md-offset-1'>
<div class='row'>
<h1>About Me</h1>
<div class='vspace'>
I am a PhD student in Computer Science and Engineering Department at UC San Diego. My advisor is Professor <a href="http://scungao.github.io/" target="_blank">Sicun Gao</a>, and we are currently working on control and planning problems in robotics. I received my master degree in Applied Mathematics from National Tsing-Hua University. My master thesis focus on analyzing the stability of dynamical systems in mathematical biology.
</div>
</div>
<div class='row'>
<h1>Research Interests</h1>
<div class='vspace'>
Robotics, Nonliear Dynamical Systems and Control.
</div>
</div>
<div class='row'>
<h1>Publications</h1>
<div class='row vspace-top'>
<div class='col-xs-3 text-center'>
<img class='paper-image' src='images/2019.png'>
</div>
<div class='col-xs-9'>
<div class='paper-title'>
Neural Lyapunov Control
</div>
<div class='paper-authors'>
<b>Ya-Chien Chang</b>, Nima Roohi, and Sicun Gao
</div>
<div>
NeurIPS (Conference on Neural Information Processing Systems) 2019
</div>
<div>
<a href="https://yachienchang.github.io/NeurIPS2019/paper/Neural_Lyapunov_Control.pdf">[Paper]</a>
<a href="https://yachienchang.github.io/NeurIPS2019/index.html">[Project Page]</a>
<a href="https://github.com/YaChienChang/Neural-Lyapunov-Control">[Code]</a>
</div>
</div>
</div>
<div class='row vspace-top'>
<div class='col-xs-3 text-center'>
<img class='paper-image' src='images/2021.png'>
</div>
<div class='col-xs-9'>
<div class='paper-title'>
Stabilizing Neural Control Using Self-Learned Almost Lyapunov Critics
</div>
<div class='paper-authors'>
<b>Ya-Chien Chang</b> and Sicun Gao
</div>
<div>
ICRA (International Conference on Robotics and Automation) 2021
</div>
<div>
<a href="https://yachienchang.github.io/ICRA2021/paper/ICRA21_1516_FI.pdf">[Paper]</a>
<a href="https://yachienchang.github.io/ICRA2021/index.html">[Project Page]</a>
<!-- <a href="https://github.com/YaChienChang/">[Code]</a>-->
</div>
</div>
</div>
<div class='row vspace-top'>
<div class='col-xs-3 text-center'>
<img class='paper-image' src='images/2023.png'>
</div>
<div class='col-xs-9'>
<div class='paper-title'>
Learning Stabilization Control from Observations by Learning Lyapunov-like Proxy Models
</div>
<div class='paper-authors'>
Milan Ganai, Chiaki Hirayama, <b>Ya-Chien Chang</b>, and Sicun Gao
</div>
<div>
ICRA (International Conference on Robotics and Automation) 2023
</div>
<div>
<a href="https://milanganai.github.io/ICRA2023/paper/ICRA_2023_Learning_Stabilization_Control_from_Observations_by_Learning_Lyapunov-like_Proxy_Models.pdf">[Paper]</a>
<a href="https://milanganai.github.io/ICRA2023/">[Project Page]</a>
<!-- <a href="https://github.com/YaChienChang/">[Code]</a>-->
</div>
</div>
</div>
<div class='row vspace-top'>
<div class='col-xs-3 text-center'>
<img class='paper-image' src='images/2024.png'>
</div>
<div class='col-xs-9'>
<div class='paper-title'>
Extremum-Seeking Action Selection for Accelerating Policy Optimization
</div>
<div class='paper-authors'>
<b>Ya-Chien Chang</b>, and Sicun Gao
</div>
<div>
ICRA (International Conference on Robotics and Automation) 2024
</div>
<div>
<a href="https://yachienchang.github.io/ICRA2024/paper/ICRA_24_ESA.pdf">[Paper]</a>
<a href="https://yachienchang.github.io/ICRA2024/index.html">[Project Page]</a>
</div>
</div>
</div>
</div>
</div>
</body>
</html>