Yong Guan

ORCID

Publication Activity (10 Years)

Years Active: 2001-2024
Publications (10 Years): 177

Top Venues

Publications

Dong Qin, George T. Amariucai, Daji Qiao, Yong Guan
Improving behavior based authentication against adversarial attack using XAI. CoRR (2024)
Yong Guan, Freddy Lécué, Jiaoyan Chen, Ru Li, Jeff Z. Pan
Knowledge-Aware Neuron Interpretation for Scene Classification. AAAI (2024)
Yong Guan, Dingxiao Liu, Jinchen Ma, Hao Peng, Xiaozhi Wang, Lei Hou, Ru Li
Event GDR: Event-Centric Generative Document Retrieval. CoRR (2024)
Yong Guan, Dingxiao Liu, Jinchen Ma, Hao Peng, Xiaozhi Wang, Lei Hou, Ru Li
Event GDR: Event-Centric Generative Document Retrieval. WWW (Companion Volume) (2024)
Mukaram Shahid, Kunal Das, Taimoor Ul Islam, Christ Somiah, Daji Qiao, Arsalan Ahmad, Jimming Song, Zhengyuan Zhu, Sarath Babu, Yong Guan, Tusher Chakraborty, Suraj Jog, Ranveer Chandra, Hongwei Zhang
Wireless Spectrum in Rural Farmlands: Status, Challenges and Opportunities. CoRR (2024)
Dong Qin, George T. Amariucai, Daji Qiao, Yong Guan, Shen Fu
A comprehensive and reliable feature attribution method: Double-sided remove and reconstruct (DoRaR). Neural Networks 173 (2024)
Jifan Yu, Xiaozhi Wang, Shangqing Tu, Shulin Cao, Daniel Zhang-Li, Xin Lv, Hao Peng, Zijun Yao, Xiaohan Zhang, Hanming Li, Chunyang Li, Zheyuan Zhang, Yushi Bai, Yantao Liu, Amy Xin, Kaifeng Yun, Linlu Gong, Nianyi Lin, Jianhui Chen, Zhili Wu, Yunjia Qi, Weikai Li, Yong Guan, Kaisheng Zeng, Ji Qi, Hailong Jin, Jinxin Liu, Yu Gu, Yuan Yao, Ning Ding, Lei Hou, Zhiyuan Liu, Bin Xu, Jie Tang, Juanzi Li
KoLA: Carefully Benchmarking World Knowledge of Large Language Models. ICLR (2024)
Xiaozhi Wang, Hao Peng, Yong Guan, Kaisheng Zeng, Jianhui Chen, Lei Hou, Xu Han, Yankai Lin, Zhiyuan Liu, Ruobing Xie, Jie Zhou, Juanzi Li
MAVEN-ARG: Completing the Puzzle of All-in-One Event Understanding Dataset with Event Argument Annotation. ACL (1) (2024)
Yong Guan, Xiaozhi Wang, Lei Hou, Juanzi Li, Jeff Z. Pan, Jiaoyan Chen, Freddy Lécué
TacoERE: Cluster-aware Compression for Event Relation Extraction. LREC/COLING (2024)
Chang-E Ren, Junhui Li, Zhiping Shi, Yong Guan, C. L. Philip Chen
Adaptive Impulsive Consensus of Nonlinear Multiagent Systems With Limited Bandwidth Under Uncertain Deception Attacks. IEEE Trans. Syst. Man Cybern. Syst. 54 (8) (2024)
Linhan Li, Qianying Zhang, Zekun Xu, Shijun Zhao, Zhiping Shi, Yong Guan
rOOM: A Rust-Based Linux Out of Memory Kernel Component. IEICE Trans. Inf. Syst. 107 (3) (2024)
Yong Guan, Freddy Lécué, Jiaoyan Chen, Ru Li, Jeff Z. Pan
Knowledge-Aware Neuron Interpretation for Scene Classification. CoRR (2024)
Ximeng Li, Shanyan Chen, Yong Guan, Qianying Zhang, Guohui Wang, Zhiping Shi
Refinement Verification of OS Services based on a Verified Preemptive Microkernel. FASE (2024)
Jiake Wang, Yong Guan, Zhenjia Kang, Pengzhan Chen
A Robust Monocular and Binocular Visual Ranging Fusion Method Based on an Adaptive UKF. Sensors 24 (13) (2024)
Yong Guan, Xiaozhi Wang, Lei Hou, Juanzi Li, Jeff Z. Pan, Jiaoyan Chen, Freddy Lécué
TacoERE: Cluster-aware Compression for Event Relation Extraction. CoRR (2024)
Ru Li, Yunxiao Zhao, Zhiqiang Wang, Xuefeng Su, Shaoru Guo, Yong Guan, Xiaoqi Han, Hongyan Zhao
A Comprehensive Overview of CFN From a Commonsense Perspective. Mach. Intell. Res. 21 (2) (2024)
Zhenjia Kang, Yong Guan, Jiake Wang, Pengzhan Chen
Research on Genetic Algorithm Optimization with Fusion Tabu Search Strategy and Its Application in Solving Three-Dimensional Packing Problems. Symmetry 16 (4) (2024)
Yong Guan, Jiaoyan Chen, Freddy Lécué, Jeff Z. Pan, Juanzi Li, Ru Li
Trigger-Argument based Explanation for Event Detection. ACL (Findings) (2023)
Dong Qin, George T. Amariucai, Daji Qiao, Yong Guan, Shen Fu
A Comprehensive and Reliable Feature Attribution Method: Double-sided Remove and Reconstruct (DoRaR). CoRR (2023)
Shahnewaz Karim Sakib, George T. Amariucai, Yong Guan
Variations and Extensions of Information Leakage Metrics with Applications to Privacy Problems with Imperfect Statistical Information. CSF (2023)
Yingjie Wu, Guohui Wang, Shanyan Chen, Zhiping Shi, Yong Guan, Ximeng Li
Formalization of Robot Collision Detection Method based on Conformal Geometric Algebra. CoRR (2023)
Shahnewaz Karim Sakib, George T. Amariucai, Yong Guan
ZeroProKeS: A Secure Zeroconf Key Establishment Protocol for Large-Scale Low-Cost Applications. IEEE Trans. Dependable Secur. Comput. 20 (5) (2023)
Ximeng Li, Qianying Zhang, Guohui Wang, Zhi-Ping Shi, Yong Guan
A unified proof technique for verifying program correctness with big-step semantics. J. Syst. Archit. 136 (2023)
Guohui Wang, Shanyan Chen, Yong Guan, Zhi-Ping Shi, Ximeng Li, Jingzhi Zhang
Formalization of the inverse kinematics of three-fingered dexterous hand. J. Log. Algebraic Methods Program. 133 (2023)
Chang-E Ren, Jiaang Zhang, Yong Guan
Prescribed Performance Bipartite Consensus Control for Stochastic Nonlinear Multiagent Systems Under Event-Triggered Strategy. IEEE Trans. Cybern. 53 (1) (2023)
Yongxin Chen, Yong Guan, Zhenzhou Shao
Real-Time Multispectral Pedestrian Detection with Weakly Aligned Cross-Modal Learning. RCAR (2023)
Jifan Yu, Xiaozhi Wang, Shangqing Tu, Shulin Cao, Daniel Zhang-li, Xin Lv, Hao Peng, Zijun Yao, Xiaohan Zhang, Hanming Li, Chunyang Li, Zheyuan Zhang, Yushi Bai, Yantao Liu, Amy Xin, Nianyi Lin, Kaifeng Yun, Linlu Gong, Jianhui Chen, Zhili Wu, Yunjia Qi, Weikai Li, Yong Guan, Kaisheng Zeng, Ji Qi, Hailong Jin, Jinxin Liu, Yu Gu, Yuan Yao, Ning Ding, Lei Hou, Zhiyuan Liu, Bin Xu, Jie Tang, Juanzi Li
KoLA: Carefully Benchmarking World Knowledge of Large Language Models. CoRR (2023)
Chen Shi, Yong Guan
Forensic Analysis of Android Cryptocurrency Wallet Applications. IFIP Int. Conf. Digital Forensics (2023)
Hu Zhang, Kunrui Li, Guangjun Zhang, Yong Guan, Ru Li
Multi-granularity Contrastive Siamese Networks for Abstractive Text Summarization. ICONIP (12) (2023)
Likun Xia, Yuan Feng, Ziheng Guo, Jinhong Ding, Yanlei Li, Yifan Li, Ming Ma, Guoxi Gan, Yehan Xu, Jingyu Luo, Zhi-Ping Shi, Yong Guan
MuLHiTA: A Novel Multiclass Classification Framework With Multibranch LSTM and Hierarchical Temporal Attention for Early Detection of Mental Stress. IEEE Trans. Neural Networks Learn. Syst. 34 (12) (2023)
Leping Zhang, Qianying Zhang, Xinyue Wang, Ximeng Li, Guohui Wang, Zhiping Shi, Yong Guan
Formal Verification of Interrupt Isolation for the TrustZone-based TEE. APSEC (2023)
Shahnewaz Karim Sakib, George T. Amariucai, Yong Guan
Measures of Information Leakage for Incomplete Statistical Information: Application to a Binary Privacy Mechanism. ACM Trans. Priv. Secur. 26 (4) (2023)
Sean W. Caldwell, Ye Zhu, Yong Guan, Riccardo Bettati
On Account Association With Assistance From Mobile Networks. IEEE Trans. Dependable Secur. Comput. 20 (4) (2023)
Zhengang Chen, Guohui Wang, Zhi-Ping Shi, Yong Guan, Tianyu Wang
Region-based Flash Caching with Joint Latency and Lifetime Optimization in Hybrid SMR Storage Systems. DATE (2023)
Yu Qiao, Hengyi Zhang, Pengfei Sun, Yuan Tian, Yong Guan, Zhenzhou Shao, Zhiping Shi
Parallelizable Simple Recurrent Units with Hierarchical Memory. ICONIP (15) (2023)
Zhonghao Liao, Chaoqun Lu, Mark Mba Wright, Hongli Feng, Yong Guan
AgBIS: A Blockchain-enabled Crop Insurance Platform Against Adverse Selection, Moral Hazard, and Insurance Frauds. Blockchain (2023)
Taimoor Ul Islam, Joshua Ofori Boateng, Guoying Zu, Mukaram Shahid, Md Nadim, Wei Xu, Tianyi Zhang, Salil Reddy, Xun Li, Ataberk Atalar, Yung-Fu Chen, Sarath Babu, Hongwei Zhang, Daji Qiao, Mai Zheng, Yong Guan, Ozdal Boyraz, Anish Arora, Mohammed Selim, Myra B. Cohen
ARA PAWR: Wireless Living Lab for Smart and Connected Rural Communities. MobiCom (2023)
Xiaozhi Wang, Hao Peng, Yong Guan, Kaisheng Zeng, Jianhui Chen, Lei Hou, Xu Han, Yankai Lin, Zhiyuan Liu, Ruobing Xie, Jie Zhou, Juanzi Li
MAVEN-Arg: Completing the Puzzle of All-in-One Event Understanding Dataset with Event Argument Annotation. CoRR (2023)
Chris Chao-Chun Cheng, Li Lin, Chen Shi, Yong Guan
An Anti-Fuzzing Approach for Android Apps. IFIP Int. Conf. Digital Forensics (2023)
Mukaram Shahid, Sarath Babu, Hongwei Zhang, Daji Qiao, Yong Guan, Joshua Ofori Boateng, Taimoor Ul Islam, Guoying Zu, Ahmed E. Kamal, Mai Zheng
Wireless guard for trustworthy spectrum management. WiNTECH@MOBICOM (2022)
Hui Zhang, Jun Ruan, Dandan Liu, Fan Yang, Sichen Fan, Yang Bai, Yong Guan, Xinliang Wang, Junru Shi, Shougang Zhang
Rb Continuously Running Atomic Fountain Clock at NTSC. IEEE Trans. Instrum. Meas. 71 (2022)
Jian Deng, Mingyue Li, Yongxin Chen, Zhenzhou Shao, Ying Qu, Yong Guan, Jun Zhang, Zhiping Shi
Cross-Guided Feature Fusion with Intra-Modality Reweighting for Multi-Spectral Pedestrian Detection. ICPR (2022)
Shen Fu, Dong Qin, George T. Amariucai, Daji Qiao, Yong Guan, Ann Smiley
Artificial Intelligence Meets Kinesthetic Intelligence: Mouse-based User Authentication based on Hybrid Human-Machine Learning. AsiaCCS (2022)
Chen Shi, Chris Chao-Chun Cheng, Yong Guan
LibDroid: Summarizing information flow of android native libraries via static analysis. Digit. Investig. 42 (Supplement) (2022)
Ye Zhu, Nicholas Ruffing, Jonathan Gurary, Yong Guan, Riccardo Bettati
Towards Smartphone Operating System Identification. IEEE Trans. Dependable Secur. Comput. 18 (1) (2021)
Yong Guan, Jingzhi Zhang, Guohui Wang, Ximeng Li, Zhiping Shi, Yongdong Li
Formalization of Euler-Lagrange Equation Set Based on Variational Calculus in HOL Light. J. Autom. Reason. 65 (1) (2021)
Ximeng Li, Qianying Zhang, Guohui Wang, Zhiping Shi, Yong Guan
Reasoning about Iteration and Recursion Uniformly based on Big-step Semantics. CoRR (2021)
Chen Shi, Chris Chao-Chun Cheng, Yong Guan
Forensic Analysis on Joker Family Android Malware. WiMob (2021)
Yong Guan, Shaoru Guo, Ru Li, Xiaoli Li, Hongye Tan
Frame Semantic-Enhanced Sentence Modeling for Sentence-level Extractive Text Summarization. EMNLP (1) (2021)
Lei Zhao, Jia Su, Zhiping Shi, Yong Guan
Feature Extraction with Apparent to Semantic Channels for Object Detection. J. Softw. 16 (4) (2021)
Shaoru Guo, Yong Guan, Ru Li, Xiaoli Li, Hongye Tan
Frame-based Multi-level Semantics Representation for text matching. Knowl. Based Syst. 232 (2021)
Chenlin Ma, Zhaoyan Shen, Jihe Wang, Yi Wang, Renhai Chen, Yong Guan, Zili Shao
Tiler: An Autonomous Region-Based Scheme for SMR Storage. IEEE Trans. Computers 70 (2) (2021)
Zhonghao Liao, Yong Guan
RUDBA: Reusable User-Device Biometric Authentication Scheme for Multi-service Systems. HOST (2021)
Hongwei Zhang, Yong Guan, Ahmed E. Kamal, Daji Qiao, Mai Zheng, Anish Arora, Ozdal Boyraz, Brian Cox, Thomas Daniels, Matthew Darr, Doug Jacobson, Ashfaq A. Khokhar, Sang Wu Kim, James Koltes, Jia Liu, Mike Luby, Larysa Nadolny, Joshua M. Peschel, Patrick S. Schnable, Anuj Sharma, Arun Somani, Lie Tang
ARA: A Wireless Living Lab Vision for Smart and Connected Rural Communities. WiNTECH@MOBICOM (2021)
Qian Lu, Xiaojuan Li, Yong Guan, Rui Wang, Zhi-Ping Shi
Modeling and Analysis of Data Flow-Oriented ROS2 Data Distribution Service. Int. J. Softw. Informatics 11 (4) (2021)
Shaoru Guo, Yong Guan, Hongye Tan, Ru Li, Xiaoli Li
Frame-based Neural Network for Machine Reading Comprehension. Knowl. Based Syst. 219 (2021)
Rongrong Zhang, Jihong Yu, Yong Guan, Jiangchuan Liu
A Dominating Set-Based Sleep Scheduling in Energy Harvesting WBANs. IEEE Trans. Veh. Technol. 70 (11) (2021)
Zehua Xuan, Chang-E Ren, Zhi-Ping Shi, Yong Guan
Semi-Supervised Domain Adaption Classifier via Broad Learning System. SMC (2021)
Ximeng Li, Qianying Zhang, Guohui Wang, Zhiping Shi, Yong Guan
Reasoning About Iteration and Recursion Uniformly Based on Big-Step Semantics. SETTA (2021)
Xing Jin, Mingchu Li, Zhen Wang, Cheng Guo, Hong Ding, Yong Guan
EigenCloud: A Cooperation and Trust-Aware Dependable Cloud File-Sharing Network. IEEE Trans. Comput. Soc. Syst. 8 (2) (2021)
Wenhao Chen, Li Lin, Jennifer Newman, Yong Guan
Automatic Detection of Android Steganography Apps via Symbolic Execution and Tree Matching. CNS (2021)
Xinmei Fu, Zhenzhou Shao, Ying Qu, Yong Guan, Yibo Zou, Zhiping Shi, Jindong Tan
Fast and Unsupervised Non-Local Feature Learning for Direct Volume Rendering of 3D Medical Images. IROS (2021)
Yong Guan
Application of Artificial Intelligence Technology in Social Training. AIAM (ACM) (2021)
Shahnewaz Karim Sakib, George T. Amariucai, Yong Guan
Information Leakage Metrics for Adversaries with Incomplete Information: Binary Privacy Mechanism. ICC (2021)
Yong Guan, Shaoru Guo, Ru Li, Xiaoli Li, Hu Zhang
Frame Semantics guided network for Abstractive Sentence Summarization. Knowl. Based Syst. 221 (2021)
Chris Chao-Chun Cheng, Chen Shi, Neil Zhenqiang Gong, Yong Guan
LogExtractor: Extracting digital evidence from android log messages via string and taint analysis. Digit. Investig. (2021)
Sean W. Caldwell, Ye Zhu, Yong Guan, Riccardo Bettati
Identifying Account Association with Assistance from Mobile Networks using Cross-Service Attacks. ICC (2021)
Yong Guan, Shaoru Guo, Ru Li, Xiaoli Li, Hu Zhang
Integrating Semantic Scenario and Word Relations for Abstractive Sentence Summarization. EMNLP (1) (2021)
Yixuan Zan, Xiaojuan Li, Yong Guan, Rui Wang, Jie Zhang
Formal Modeling and Verification of EDCA Based on Probabilistic Model Checking. HPCC/DSS/SmartCity (2020)
Zhenzhou Shao, Ying Qu, Guangli Ren, Guohui Wang, Yong Guan, Zhiping Shi, Jindong Tan
Batch Normalization Masked Sparse Autoencoder for Robotic Grasping Detection. IROS (2020)
Yixing Huang, Shengxiang Wang, Yong Guan, Andreas K. Maier
Limited Angle Tomography for Transmission X-Ray Microscopy Using Deep Learning. CoRR (2020)
Shaoru Guo, Ru Li, Hongye Tan, Xiaoli Li, Yong Guan, Hongyan Zhao, Yueping Zhang
A Frame-based Sentence Representation for Machine Reading Comprehension. ACL (2020)
Shaoru Guo, Yong Guan, Ru Li, Xiaoli Li, Hongye Tan
Incorporating Syntax and Frame Semantics in Neural Network for Machine Reading Comprehension. COLING (2020)
Xiangyu Chen, Ximeng Li, Qianying Zhang, Zhiping Shi, Yong Guan
Formalizing the Transaction Flow Process of Hyperledger Fabric. ICFEM (2020)
Yong Guan, Ru Li, Shaoru Guo
What Linguistic Information Does Reading Comprehension Require? CCKS (2020)
Chang-E Ren, C. L. Philip Chen, Tao Du, Yong Guan
Correction to: Fuzzy Adaptive Leader-Following Consensus Control for Nonlinear Multi-Agent Systems with Unknown Control Directions. Int. J. Fuzzy Syst. 22 (2) (2020)
Shanyan Chen, Guohui Wang, Ximeng Li, Qianying Zhang, Zhi-Ping Shi, Yong Guan
Formalization of Camera Pose Estimation Algorithm based on Rodrigues Formula. Formal Aspects Comput. 32 (4-6) (2020)
Stephanie Reinders, Li Lin, Wenhao Chen, Yong Guan, Jennifer Newman
Score-based likelihood ratios for camera device identification. Media Watermarking, Security, and Forensics (2020)
Mingyue Li, Zhenzhou Shao, Zhiping Shi, Yong Guan
Deep Visible and Thermal Image Fusion with Cross-Modality Feature Selection for Pedestrian Detection. NPC (2020)
Jesse Crawford, Yong Guan
Knowing your Bitcoin Customer: Money Laundering in the Bitcoin Economy. SADFE (2020)
Dong Qin, Shen Fu, George T. Amariucai, Daji Qiao, Yong Guan
MAUSPAD: Mouse-based Authentication Using Segmentation-based, Progress-Adjusted DTW. TrustCom (2020)
Yong Guan, Jie Zhang, Zhiping Shi, Yi Wang, Yongdong Li
Formalization of continuous Fourier transform in verifying applications for dependable cyber-physical systems. J. Syst. Archit. 106 (2020)
Rui Wang, Yong Guan, Xiaojuan Li, Rui Zhang
Formal Verification of CAN Bus in Cyber Physical System. QRS Companion (2020)
Ning Han, Ximeng Li, Guohui Wang, Zhiping Shi, Yong Guan
Formal Verification of Atomicity Requirements for Smart Contracts. APLAS (2020)
Zhihao Lu, Rui Wang, Yong Guan
Formal verification of discrete event model. TAV-CPS/IoT@ISSTA (2020)
Leping Zhang, Qianying Zhang, Guohui Wang, Zhiping Shi, Minhua Wu, Yong Guan
Formal Modelling and Verification of Spinlocks at Instruction Level. APSEC (2019)
Shaojie Li, Shaohua Wang, Yong Guan, Zhiyan Xie, Kejia Huang, Ming Wen, Lixin Zhou
A High-performance Cross-platform Map Rendering Engine for Mobile Geographic Information System (GIS). ISPRS Int. J. Geo Inf. 8 (10) (2019)
Qianying Zhang, Shijun Zhao, Zhiping Shi, Yong Guan, Guohui Wang
A Comprehensive Formal Security Analysis and Revision of the Two-phase Key Exchange Primitive of TPM 2.0. IACR Cryptol. ePrint Arch. 2019 (2019)
Meiyu Zhang, Qianying Zhang, Shijun Zhao, Zhiping Shi, Yong Guan
SoftME: A Software-Based Memory Protection Approach for TEE System to Resist Physical Attacks. Secur. Commun. Networks 2019 (2019)
Jingzhi Zhang, Guohui Wang, Zhiping Shi, Yong Guan, Yongdong Li
Formalization of functional variation in HOL Light. J. Log. Algebraic Methods Program. 106 (2019)
Xinyu Wang, Xiaojuan Li, Yong Guan, Jiadong Song, Rui Wang
Bidirectional Potential Guided RRT* for Motion Planning. IEEE Access 7 (2019)
Chang Sun, Jia Su, Wenpeng Ren, Yong Guan
Wide-View Sidewalk Dataset Based Pedestrian Safety Application. IEEE Access 7 (2019)
Li-Ming Li, Zhi-Ping Shi, Yong Guan, Qianying Zhang, Yong-Dong Li
Formalization of Geometric Algebra in HOL Light. J. Autom. Reason. 63 (3) (2019)
Jiexin Xie, Zhenzhou Shao, Yue Li, Yong Guan, Jindong Tan
Deep Reinforcement Learning With Optimized Reward Functions for Robotic Trajectory Planning. IEEE Access 7 (2019)
Stephanie Reinders, Li Lin, Yong Guan, Min Wu, Jennifer Newman
Algorithm Mismatch in Spatial Steganalysis. Media Watermarking, Security, and Forensics (2019)
Chang Sun, Jia Su, Zhiping Shi, Yong Guan
P-Minder: A CNN Based Sidewalk Segmentation Approach for Phubber Safety Applications. ICIP (2019)
Fuyang Li, Keni Qiu, Mengying Zhao, Jingtong Hu, Yongpan Liu, Yong Guan, Chun Jason Xue
Checkpointing-Aware Loop Tiling for Energy Harvesting Powered Nonvolatile Processors. IEEE Trans. Comput. Aided Des. Integr. Circuits Syst. 38 (1) (2019)
Jennifer Newman, Li Lin, Wenhao Chen, Stephanie Reinders, Yangxiao Wang, Min Wu, Yong Guan
StegoAppDB: a Steganography Apps Forensics Image Database. Media Watermarking, Security, and Forensics (2019)
Dongxu Ji, Qianying Zhang, Shijun Zhao, Zhiping Shi, Yong Guan
MicroTEE: Designing TEE OS Based on the Microkernel Architecture. CoRR (2019)
Duo Liu, Chaoneng Xiang, Shiming Li, Jinting Ren, Renping Liu, Liang Liang, Yong Guan, Xianzhang Chen
HiNextApp: A context-aware and adaptive framework for app prediction in mobile systems. Sustain. Comput. Informatics Syst. 22 (2019)

Yong Guan.css-eqlu8i{font-size:small;padding-left:4px;}

Publication Activity (10 Years)

Top Topics

Top Venues

Yong Guan