https://www.xli-lab.com/home daily 1.0 2026-02-02 https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/1654691986038-W9VP5QIFRQKK8WBO6LSG/3.jpg Home https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/1654692014660-EYOU189P3V6AK1AW4TBX/2021-10-6-hotpot.jpg Home https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/1654692136774-U2WLZJY72BN1JP1DT7CL/11.jpg Home https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/1654692207006-3CLD0UKHD8Y28SXU4Y55/2021-12-23-hotpot.jpg Home https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/c2753426-dd8c-4f43-b9d7-7e8a334dcd79/2022-11-11-Gyu-Kaku.jpg Home https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/604039d4-5ab7-4d0a-b41e-4347fd152e4c/2023-5-11-WuTong+Mount-2.jpeg Home https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/af56ec03-5c24-426b-a012-f985bdd881fc/2023-5-11-WuTong+Mount-3.jpeg Home https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/67067856-a37b-43b5-b61c-20d8e4afd3f6/2023-5-11-WuTong+Mount-1.jpeg Home https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/f2e98cbc-b303-4662-bac1-2069da2fa360/20230905_gathering.jpg Home https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/8827bfaf-428c-4ef4-b0f7-5277337b1514/2024-3-4-Discovery_Bay.jpg Home https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/ef266a00-51b3-47fe-96b6-9a056b9f6876/2024-3-4_MuiWo.jpg Home https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/6309e4cd-c764-4fbb-b305-a5bb4df9b44e/2024-9-17-welcome+lunch.jpg Home https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/e4ba2719-24b2-47fc-8131-6522b83dd619/2025-11-5-Cheng_oral_defense.jpg Home https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/ed11126c-50f9-41a8-8c6f-620a311745c3/20250613.jpg Home https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/bed70bde-173e-4e3a-8974-6623a9ac1f37/gathering20250903.jpg Home https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/4cb77d6d-037f-4083-a968-a2042a456b99/20250918.jpg Home https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/4b348da2-bbd9-4326-a214-df86570e9f71/2025-12-9-gathering.jpg Home https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/65245849-f622-44c2-9af2-9eed4ffa79f1/2025-12-9-hiking.jpg Home https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/cc947a5e-2f47-41cf-834a-be5522c6a9ef/2025-12-9-hiking-2.jpg Home https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/32636c04-f9f4-4941-ab4e-5ffea9d5974f/2025-12-9-hiking-3.jpg Home https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/0d3979d0-29d8-4fbb-a867-69f4c4e2f762/aaai_oral.png Home https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/e336852e-82ad-49cd-be4d-d8de0ef6b6c0/aaai_poster.png Home https://www.xli-lab.com/research daily 0.75 2025-09-04 https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/3a6c6f4c-3633-4822-b2c6-d3a3a36e3082/nicole_1.png Research - Raw MRI image https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/cb0a3e01-1ea5-417f-b367-0d73e3f259ef/c1.png Research - Make it stand out Figure 1. The ability of wearable-based machine learning models to predict poor performance on cognitive tests in the NHANES (Sakal et al. 2024, published in npj Aging) https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/346df5b4-4bec-4d4a-bb1b-2632e858db28/c2.png Research - Make it stand out Figure 2. Associations of pre-bedtime physical activity timing with poor sleep quality among adults in the UK Biobank (Sakal et al. 2025, published in SLEEP). https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/a19ce3d6-4151-4875-84fe-8e48a8f91262/survival.png Research - Raw MRI image Model for multi-modal survival prediction https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/9a2d0250-f824-4950-8ee6-44329b13c7c0/cc2_3.png Research - Make it stand out Figure 1. Activity profile showing minute-by-minute physical activity counts for a week. Data were obtained from wrist Actigraph. https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/51ce19a7-4fc4-48d9-93fe-95cdbdd1768e/cc2_2.jpg Research - Make it stand out Figure 2. Statistical inference evaluation of mental health assessment results. White regions indicate no significant effects, red indicates significantly positive effects, and blue indicates significantly negative effects, while the darkness of the colors represents the magnitude of the effects. https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/440ed35c-c998-43a7-b970-1d159e9a346f/WeChat+Image_20220609112311.jpg Research 25 skeletal joints captured by a Kinect sensor https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/743b5ee4-14e7-4306-b679-fc3def097eae/3tug-2.GIF Research Timed Up and Go Test https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/ffe92f52-e57e-43c9-bb76-21a58af838a0/WeChat+Image_20220609112332.jpg Research The estimated coefficient functions of vertical velocity for different joints. Each curve represents the estimated coefficient function of a joint and is color coded based on its position of body skeleton. https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/5a4e4f48-4aea-494e-93dc-1d95ef88db9a/WeChat+Image_20220611175406.png Research - Raw MRI image The 25 joints of human skeleton captured by Kinect sensor https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/a78b6fd7-2971-4008-9dc6-d06003bd7755/WeChat+Image_20220611181116.png Research - Heatmap Instruction of Timed Up and Go Test https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/6bbdbcae-050d-4e21-89d2-c221efb78b0e/WeChat+Image_20220611175401.png Research - MRI with Heatmap The estimated coefficient functions of vertical velocity for different. https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/e5e5693c-3461-4119-9494-1f7690516e1c/t2.png Research - Raw MRI image Basic model framwork https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/880b51f1-d9ab-411f-9125-bfa6b115c4ee/x.png Research - Make it stand out The plots show the 2D relationship between sleep efficiency and physical activity level within one week. Large coefficient value corresponds to better sleep quality. https://www.xli-lab.com/software daily 0.75 2022-06-15 https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/bb830ff0-3af8-40ac-9cf8-70689bedbec7/Figure_1.png Software - Make it stand out This package applies a Hidden Markov Model (HMM) based algorithm for Sleep/Wake Identification using actigraphy. The accelerometer data should be in the summary activity count format, such as activity counts every thirty seconds. https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/1371f94e-bee5-4f80-9e87-c97ce271ef79/ind_plot_filter.png Software - Make it stand out This package implements the Penalized Multi-Band Learning(PML) algorithm for circadian rhythm analysis and daily activity pattern characterization using actigraphy. This package also includes functions for building interactive visualization tools. https://www.xli-lab.com/members daily 0.75 2025-11-08 https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/1654940478713-7FGZVSHVV4PE096CAA2C/WeChat+Image_20220611172510.png Members https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/e5fbd55c-1b10-4717-bc87-23168c227b2f/xvwenxin.jpg Members https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/eea3ec6b-7a3d-4568-a326-263e613ceeeb/xiangrui.jpg Members https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/cee62a76-ae8e-4a41-aed4-b7d3ef57f35a/SHI+MENGHAN.jpg Members https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/98878adc-c1eb-4ab8-847d-b071eb19301b/xinci_LIU.jpg Members https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/1655129679041-H639E32RJYBLA1NQ06ZU/WeChat%25252BImage_20220607115235.jpg Members https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/927984d5-68d5-4ee3-99c5-cdb50f138443/headshot2.jpg Members https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/1088933d-f4dd-46a4-9987-0959ab4bc38e/junbiao.jpg Members https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/f7157fa3-2416-47fa-9bc9-4d750a5bedf6/tianyu.jpg Members https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/1654746706824-NVXQGN922IMFICYEYON2/WeChat+Image_20220608212059.jpg Members https://images.squarespace-cdn.com/content/v1/629eab4b036e7b6e5870ab13/f0d9b1ac-849b-420d-b6d5-a0442d56fec0/xinyueli_STF.jpg Members - Dr. LI Xinyue Dr. LI Xinyue Dr Li received her PhD in Biostatistics from Yale University in 2019. Prior to Yale University, she spent one year at Peking University and three years at the University of Chicago, receiving her B.A. and M.S. in Statistics from the University of Chicago. Her research interests are statistical methods for wearable device data, electronic health records, large population studies, genetics and precision medicine. https://www.xli-lab.com/teaching daily 0.75 2025-05-02 https://www.xli-lab.com/take-action daily 0.75 2022-06-07 https://www.xli-lab.com/publications daily 0.75 2025-11-08