- Iterative Learning Control Systems
- Landslides and related hazards
- Seismic Waves and Analysis
- Tribology and Lubrication Engineering
- Seismic Imaging and Inversion Techniques
- earthquake and tectonic studies
- Geological and Geophysical Studies
- Adhesion, Friction, and Surface Interactions
- Adaptive Control of Nonlinear Systems
- Oceanographic and Atmospheric Processes
- Advanced Measurement and Metrology Techniques
- Seismology and Earthquake Studies
- Cryospheric studies and observations
- Stability and Control of Uncertain Systems
- Methane Hydrates and Related Phenomena
- Hydrocarbon exploration and reservoir analysis
- Remote Sensing and Land Use
- Piezoelectric Actuators and Control
- Magnetic Bearings and Levitation Dynamics
- Statistical Methods and Inference
- Hydraulic and Pneumatic Systems
- Geochemistry and Geologic Mapping
- Dam Engineering and Safety
- Seismic Performance and Analysis
- Elevator Systems and Control
National Earthquake Response Support Service
2015-2024
Southern Medical University
2010-2020
University of Chinese Academy of Sciences
2010-2018
Chinese Academy of Sciences
2010-2013
Institute of Geology and Geophysics
2010-2012
University of California, San Francisco
2012
Seagate (United States)
2006-2010
University of California, Berkeley
2004-2007
Tsinghua University
2000-2003
Abstract. Landslides present a significant hazard for humans, but continuous landslide monitoring is not yet possible due to their unpredictability. In recent years, numerical simulation and seismic inversion methods have been used provide valuable data understanding the entire process of movement. However, each method has shortcomings. Dynamic based on long-period signals gives force–time history using an empirical Green's function lacks detailed flowing characteristics hazards. Numerical...
This paper presents a microelectromechanical systems (MEMS) capacitive position sensor for nanopositioning applications in Probe storage systems. The objective of the system design is to develop high-precision <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">X</i> - xmlns:xlink="http://www.w3.org/1999/xlink">Y</i> linear and rotational with minimum area large range movements at high speed. To achieve this, first, simple noise model scalable was...
The catastrophic Wulong landslide occurred at 14:51 (Beijing time, UTC+8) on 5 June 2009, in Prefecture, Southwest China. This rockslide a complex topographic environment. Seismic signals generated by this event were recorded the seismic network deployed surrounding area, and long-period extracted from 8 broadband stations within 250 km to obtain source time functions inversion. location of was simultaneously acquired using stepwise refined grid search approach, with an error ~2.2 km....
This paper presents the system modeling, design, and analysis of multirate robust track-following controllers for a dual-stage servo with microelectromechanical systems (MEMS) microactuator (MA) an instrumented suspension. A generalized model is constructed which includes nominal plant, disturbances, uncertainties, sensing control. Two major categories controller design methodologies are considered. The first synthesis that based on single-input single-output (SISO) techniques, sensitivity...
We recently reported that integrin α(v)β(3) is necessary for vascular barrier protection in mouse models of acute lung injury and peritonitis. Here, we used mass spectrometric sequencing complexes to isolate the novel β(3)-integrin binding partner IQGAP1. Like β(3), IQGAP1 localized endothelial cell-cell junction after sphingosine-1-phosphate (S1P) treatment, knockdown prevented cortical actin formation enhancement response S1P. Furthermore, localization junction. Similar β(3)-null animals,...
This paper proposes a robust track-following controller design method for dual-stage servo system in magnetic hard disk drives (HDDs). The formulates the problem of minimizing track misregistration (TMR) presence plant uncertainty and variation as multiobjective optimization problem. Tracking error minimization is naturally formulated an H/sub 2/ norm problem, while stability issue addressed by some /spl infin// bounds. mixed 2//H/sub control can then be set linear matrix inequalities (LMIs)...
This paper proposes controller design methods, specially for track-following control of the magnetic read/write head in a hard disk drive (HDD). The servo system to be considered is general dual-stage multisensing system, which encompasses most configurations encountered HDD industry, including traditional single-stage system. For robust problem formulated as time-varying version H2 synthesis problem. Both dynamic and real parametric uncertainties, are typical model uncertainties control,...
Our previous data showed membrane hyperpolarization of arteriolar smooth muscle cells (ASMCs) caused by adenosine triphosphate (ATP)-sensitive potassium channels (K(ATP)) activation contributed to vascular hyporeactivity in shock. Despite supply oxygen and nutrients, vasoconstrictor agents still remains, which may result from low ATP level. The study was designed investigate shock-induced mitochondrial changes rat ASMCs the genesis treatment hypotension severe shock.The animals were divided...
This paper proposes a multirate design method for robust track-following controllers in hard disk drives (HDDs). The HDDs to be considered are dual-stage multi-sensing systems. A problem, which takes into account stability, is formulated as periodic time-varying version of the standard mixed H <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> /H xmlns:xlink="http://www.w3.org/1999/xlink">∞</inf> control problem. problem solved via solution...
Research on ocean internal waves using seismic oceanography is a frontier issue both for marine geophysicists and physical oceanographers. Images of the water layer obtained by conventional processing multichannel reflection data can show overall patterns waves. However, in order to extract more information from data, new tools need be developed. Here, we use ensemble empirical mode decomposition (EEMD) method decompose vertical displacement sections apply this section northeastern South...
Abstract Seismic oceanography has been widely used to detect many kinds of oceanographic features as a new prospecting method. Inversion for temperature and salinity distributions from seismic data is very important research field in oceanography. We analyzed low frequency one multichannel (MCS) line acquired the scope European GO Project (line GOLR‐12) combined with simultaneously XBT (eXpendable BathyThermograph) CTD (Conductivity‐Temperature‐Depth) data, which are located southwest...
This paper presents the design and analysis of a dual-stage servo system with an instrumented suspension for use in hard disk drives. The is equipped microelectromechanical microactuator (MA), either rotational or translational, as secondary actuator. In both cases, MA has resonance mode at 2.2 kHz virtually no other modes up to 40 kHz. Two approaches, sensitivity decoupling multiobjective optimization, are applied system. With approach, translational actuator achieves better tracking...
The catastrophic Sanyanyu and Luojiayu debris flows, which were induced by heavy rain, struck Zhouqu County in Gannan Prefecture, Gansu Province, at approximately midnight, 7 August 2010 (Beijing time, UTC + 8), causing 1765 fatalities huge economic loss. ZHQ seismic station is located 170 m west of the outlet gully, its power system was destroyed flow when leading edge reached vicinity station. In this paper, signals recorded 10 min before termination are collected analyzed to study flow. A...
Abstract Tectono‐thermal evolution modeling based on geodynamic methods is an important method for studying sedimentary basin's thermal history. We restored superimposed complex and long‐time by using balanced cross‐section method, inverted its paleo‐heatflow multiple‐stage finite extensional compressional strain rate with Yisui profile in the Jianghan Basin as example. Finally, we calculated paleo‐temperature of basin. Thus, established a workflow modeling, which tectonic restoration,...
This paper presents the design and analysis of a track-following controller using mixed-objective optimization technique for dual-stage servo systems in hard disk drives (HDD). The objective minimizing tracking error presence plant uncertainties operational variations is formulated into framework multi-objective minimization. minimization reasonably as an H/sub 2/ norm problem, while robust stability issue addressed by some /spl infin// bounds. These or constraints are then translated set...