Feng Zhao, Student Member, Peter B. Luh, Joseph H. Yan, Senior Member, Gary A. Stern, ...
Abstract—Deregulated electricity markets in the U.S. currently use an auction mechanism that minimizes total supply bid costs to select bids and their levels. Payments are then settled based on...
A One-Compartment Fructose/Air Biological Fuel Cell based on Direct Electron Transfer (2009)
Wu, Xuee, Zhao, Feng, Varcoe, John R, Thumser, Alfred EA, Avignone-Rossa, Claudio, Slade, Robert CT
The construction and characterization of a one-compartment fructose/air biological fuel cell (BFC) based on direct electron transfer is reported. The BFC employs bilirubin oxidase and d-fructose...
Varcoe, John R, Wu, Xuee, Zhao, Feng, Thumser, Alfred E, Avignone-Rossa, Claudio, Slade, Robert CT
A conductive cellulose - multiwalled carbon nanotube (MWCNT) matrix with a porous structure and good biocompatibility has been prepared by using room temperature ionic liquids...
Mask design for the Space Interferometry Mission internal metrology (2009)
Marx, David, Zhao, Feng, Korechoff, Robert
NASA/JPL
Liu, Youning, Chen, Minjun, Zhao, Tiemei, Wang, Hui, Wang, Rui, Cai, Baiqiang, ...
Abstract Background Knowledge of predominant microbial patterns in community-acquired pneumonia (CAP) constitutes the basis for initial decisions about empirical antimicrobial treatment, so a...
Gong Chen, Wenbo He, Jie Liu, Suman Nath, Leonidas Rigas, Lin Xiao, ...
Energy consumption in hosting Internet services is becoming a pressing issue as these services scale up. Dynamic server provisioning techniques are effective in turning off unnecessary servers to...
Media Impact Aman Kansal, (2009)
Suman Nath, Jie Liu, Feng Zhao
Peer-produced systems can achieve what might be infeasible for stand-alone systems developed by a single entity. Take Wikipedia, for example. Each contributor to the site provides a small piece of...
Diagnosis and Management of Chylothorax after resection of Lung Cancer (2009)
Li WAN, Jianjun WANG, Feng ZHAO, Kai FAN
Background and objective With the development of lung cancer surgery, the rate of chylothorax after resection of lung cancer had an increasing trend year by year. The aim of this study is to explore...
Nonparametric Estimation of State-Price Densities Implicit in Interest Rate Cap Prices (2009)
Based on a multivariate extension of the constrained locally polynomial estimator of Aït-Sahalia and Duarte (2003), we provide one of the first nonparametric estimates of probability densities of...
Gong Chen, Wenbo He, Jie Liu, Suman Nath, Leonidas Rigas, Lin Xiao, ...
Energy consumption in hosting Internet services is becoming a pressing issue as these services scale up. Dynamic server provisioning techniques are effective in turning off unnecessary servers to...
Tiny Web Services for Sensor Device Interoperability (2008)
Bodhi Priyantha, Aman Kansal, Michel Goraczko, Feng Zhao
There are many scenarios where interoperability is required for sensor devices. We demonstrate one approach to achieve interoperability: using web services. Hosting a web service challenges the...
David Chu, Feng Zhao, Jie Liu, Michel Goraczko
Abstract. Several considerable impediments stand in the way of sensor network prototype applications that wish to realize sustained deployments. These are: scale, longevity, data of interest, and...
Laser metrology sensing and control for large segmented-mirror telescopes (2008)
Zhao, Feng, Rao, Shanti, Ksendzov, Alex, Kadogawa, Hiroshi
NASA/JPL
Monitoring and Fault Diagnosis of Hybrid Systems ∗ (2008)
Feng Zhao, Xenofon Koutsoukos, Horst Haussecker, Jim Reich, Patrick Cheung
Many networked embedded sensing and control systems can be modeled as hybrid systems with interacting continuous and discrete dynamics. These systems present significant challenges for moni-toring...
AND JAMES REICH, MEMBER, IEEE (2008)
Feng Zhao, Jie Liu, Juan Liu, Leonidas Guibas
This paper describes information-based approaches to processing and organizing spatially distributed, multimodal sensor data in a sensor network. Energy-constrained networked sensing systems must...
Peter B. Luh, William E. Blankson, Student Member, Ying Chen, Student Member, Joseph H. Yan, ...
Abstract—Deregulated electricity markets use an auction mechanism to select offers and their power levels for energy and ancillary services. A settlement mechanism is then used to determine the...
Monitoring and Fault Diagnosis of Hybrid Systems (2008)
Feng Zhao, Xenofon Koutsoukos, Horst Haussecker, Jim Reich, Patrick Cheung
Abstract—Many networked embedded sensing and control systems can be modeled as hybrid systems with interacting continuous and discrete dynamics. These systems present significant challenges for...
Information-Directed Routing in Sensor Networks Using Real-Time Reinforcement Learning (2008)
Maggie Cheng, Yingshu Li, Ying Zhang, Juan Liu, Feng Zhao
The primary task of a sensor network is sensing, that is, to collect information from a physical environment in order to answer a set of user queries or support other decision-making functions....
A common-path laser heterodyne interferometer capable of measuring the internal optical path difference (OPD) with accuracy of the order of 10 pm was demonstrated at JPL. To achieve this accuracy,...
Payment cost minimization auction for deregulated electricity markets (2008)
Deregulated electricity markets in the US currently use an auction that minimizes the total bid cost to select bids and their levels. Payments are then settled based on market clearing prices. Under...
Factors affecting the performance of microbial fuel cells for sulfur pollutants removal (2008)
Zhao, Feng, Rahunen, Nelli, Varcoe, John R, Roberts, Alexander J, Avignone-Rossa, Claudio, Thumser, Alfred E, ...
A microbial fuel cell (MFC) has been developed for removal of sulfur-based pollutants and can be used for simultaneous wastewater treatment and electricity generation. This fuel cell uses an...
Sun, Baoyun, Ren, Tongxiang, Miao, Xiaopei, Dai, Fucai, Jin, Long, Yuan, Hui, ...
The electrochemical properties of the carbon-bridged fullerene dimers C-121(I), C-121(II), C-121(III), C-131, and C-141 were characterized systematically for the first time in this study. Cyclic...
Laser metrology in the micro-arcsecond metrology testbed (2007)
An, Xin, Marx, D., Goullioud, Renaud, Zhao, Feng
The Space Interferometer Mission (SIM), scheduled for launch in 2009, is a space-born visible light stellar interferometer capable of micro-arcsecond-level astrometry. The Micro-Arcsecond Metrology...
To appear, AAAI-99 In uence-Based Model Decomposition (2007)
Christopher Bailey-kellogg, Feng Zhao
Recent rapid advances in MEMS and information processing technology have enabled a new generation of AI robotic systems | so-called Smart Matter systems | that are sensor rich and physically...
Computing Topological Adjacency Relations Between Iso-contours (2007)
Contoured charts are widely used to visualize 2D physical fields. Experts can identify global patterns and structures in a contoured chart by looking at the isocurves and reasoning about their...
"Seeing" Objects in Spatial Datasets (2007)
. Regularities exist in datasets describing spatially distributed physical phenomena. Human experts often understand and verbalize the regularities as abstract spatial objects evolving coherently and...
Model Semantics and Simulation for Hybrid Systems Operating in Sliding Regimes (2007)
Pieter J. Mosterman, Feng Zhao, Gautam Biswas
We describe a model semantics and a simulation algorithm for characterizing a class of dynamic physical systems operating in the so-called sliding regimes. Many continuous physical systems operate at...
Qualitative Analysis of Distributed Physical Systems with Applications to Control Synthesis (2007)
Christopher Bailey-Kellogg, Feng Zhao
Many important physical phenomena, such as temperature distribution, air flow, and acoustic waves, are described as continuous, distributed parameter fields. Analyzing and controlling these physical...
Machine Recognition as Representation and Search (2007)
Generality, representation, and control have been the central issues in machine recognition. Model-based recognition is the search for consistent matches of the model ad image features. We present a...
Feng Zha, Feng Zhao, Richard Thornton, Richard Thornton
We describe the automatic synthesis of a global nonlinear controller for stabilizing a magnetic levitation system--a simplified model for the German Transrapid system. A systematic state-space design...
Machine Recognition as Representation and Search (2007)
Generality, representation, and control have been the central issues in machine recognition. Model-based recognition is the search for consistent matches of the model and image features. We present a...
Extracting and Representing ualitative Behaviors of Cornplex Systerns 'in Phase Spaces (2007)
We develop a qualitative method for understanding and representing phase space structures of complex systems. To demonstrate this method, a program has been constructed that understands qualitatively...
AAAI98 Tutorial Intelligent Simulation Zhao/Bailey-Kellogg Acknowledgement (2007)
Feng Zhao, Chris Bailey-kellogg
ffl Ken Yip is a major collaborator in developing the Spatial Aggregation theory and language. Elisha Sacks has collaborated on developing imagistic reasoning. ffl Members of Intelligent Simulation...
The SAL Interpreter for Large-Scale Optimization in Distributed Control Systems (2007)
Christopher Bailey-kellogg, Feng Zhao
Many sensor-rich control systems interact with spatially distributed physical environments. This paper describes the Spatial Aggregation Language (SAL) interpreter, a programming environment to...
In uence-Based Model Decomposition (2007)
Christopher Bailey-kellogg, Feng Zhao
Recent rapid advances in MEMS and information processing technology have enabled a new generation of AI robotic systems | so-called Smart Matter systems | that are sensor rich and physically...
Controller Synthesis and Verification for Nonlinear Systems: (2007)
Feng Zhao, Jeff A. May, Shiou C. Loh
A computational approach using phase-space geometric models
Computational Dynamics: (2007)
This paper describes a computational technique for modeling and visualizing dynamical behaviors of complex systems in phase space. The technique employs a novel idea of flow pipes to model trajectory...
Juan Liu, Jie Liu, James Reich, Patrick Cheung, Feng Zhao
their help on directed diffusion. We would also like to thank our colleagues Dave Duff, Jaewon Shin, and Rebecca Hinden for their assistance in carrying out the experiment. c ○ 2003 Kluwer Academic...
Sri Kumar, David Shepherd, Feng Zhao
authors, and do not necessarily reflect the views of the organizations or affiliation of the authors. Introduction: The purpose of this special issue is to provide a source of reference for the...
State-Centric Programming for Sensor-Actuator Network Systems (2007)
Networked embedded systems must be able to rapidly respond to all kinds of sensing events, even though they have numerous failure-prone nodes and limited energy and bandwidth resources. The design...
In Proc. of IJCAI-2001 Distributed Monitoring of Hybrid Systems: A model-directed approach (2007)
Feng Zhao, Xenofon Koutsoukos, Horst Haussecker, James Reich, Patrick Cheung
This paper presents an efficient online mode estimation algorithm for a class of sensor-rich, distributed embedded systems, the so-called hybrid systems. A central problem in distributed diagnosis of...
4D Near-Field Source Localization Using Cumulant (2007)
Junli Liang, Shuyuan Yang, Junying Zhang, Li Gao, Feng Zhao
This paper proposes a new cumulant-based algorithm to jointly estimate four-dimensional (4D) source parameters of multiple near-field narrowband sources. Firstly, this approach proposes a new...
4D Near-Field Source Localization Using Cumulant (2007)
Junli Liang, Shuyuan Yang, Junying Zhang, Li Gao, Feng Zhao
This paper proposes a new cumulant-based algorithm to jointly estimate four-dimensional (4D) source parameters of multiple near-field narrowband sources. Firstly, this approach proposes a new...
Gong Chen, Wenbo He, Jie Liu, Suman Nath, Leonidas Rigas, Lin Xiao, ...
Energy consumption in hosting Internet services is becoming a pressing issue as these services scale up. Dynamic server provisioning techniques are effective in turning off unnecessary servers to...
A common-path laser heterodyne interferometer capable of measuring the internal OPD with accuracy of the order of 10 picometers was demonstrated at JPL. To achieve this accuracy, the relative power...
An analysis of the phase dispersion in the symmetric beam combiner (2006)
An astronomical beam combiner combines the two beams of starlight to form white-light fringes. It is desirable that the dispersion of the beam combiner be minimized across the observation wavelength...
SIM astrometric demonstration at the 150 picometer level using the MAM testbed (2006)
Goullioud, Renaud, Akopyan, Shake, An, Xin, Azevedo, Steve, Bell, Charlie, Bloemhof, Eric, ...
NASA/JPL
Metrology system for the Terrestrial Planet Finder Coronagraph (2006)
Shaklin, Stuart, Marchen, Luis, Zhao, Feng, Peters, Robert D., Ho, Tim, Holmes, Buck
The Terrestrial Planet Finder (TPF) employs an aggressive coronagraph designed to obtain better than 1e-10 contrast inside the third Airy ring. Minute changes in low-order aberration content scatter...
Picometer laser metrology for the Space Interferometery Mission (2006)
This paper reports the progress on displacement measuring laser heterodyne interferometers for the SIM program. We will also describe the technical approaches and results from ground testbeds.
Distributed Tracking in Wireless Ad Hoc Sensor Networks (2006)
Chong, Chee-Yee, Zhao, Feng, Mori, Shozo, Kumar, Sri
Target tracking is an important application for wireless ad hoc sensor networks. Because of the energy and communication constraints imposed by the size of the sensors, the processing has to be...
Semantic Streams: A Framework for Composable Semantic Interpretation of Sensor Data (2006)
Kamin Whitehouse, Feng Zhao, Jie Liu
Abstract. We present a framework called Semantic Streams that allows users to pose declarative queries over semantic interpretations of sensor data. For example, instead of querying raw magnetometer...
Semantic Streams: A Framework for Composable Semantic Interpretation of Sensor Data (2006)
Abstract. We present a framework called Semantic Streams that allows users to pose declarative queries over semantic interpretations of sensor data. For example, instead of querying raw magnetometer...
Halverson, Peter G., Alvarez-Salazar, Oscar, Azizi, Alireza, Dekens, Frank, Nemati, Bijan, Zhao, Feng
The Space Interferometry Mission, scheduled for launch in 2008, is an optical stellar interferometer with a 10 meter baseline capable of micro-arcsecond accuracy astrometry.
NASA
Investigation of polarization effects in anode-supported solid oxide fuel cells / (2005)
Thesis (Ph. D.)--Dept. of Materials Science and Engineering, University of Utah, 2005.
Semantic streams: A framework for declarative queries and automatic data interpretation (2005)
Kamin Whitehouse, Feng Zhao, Jie Liu
We present a framework called Semantic Streams that allows users to pose declarative queries over semantic interpretations of sensor data. For example, instead of querying raw sensor data, the user...
Vita.
Design, analysis and experimental study of RF 4H-SiC npn bipolar junction transistors / (2004)
Thesis (Ph. D.)--University of Colorado, 2004.
Roamhba: maintaining group connectivity in sensor networks (2004)
Qing Fang, Jie Liu, Leonidas Guibas, Feng Zhao
This paper presents a new group communication scheme, roamingcast, for collaborative information processing in wireless sensor networks. Roamingcast enables efficient communication among a subset of...
Jie Liu, Patrick Cheung, Leonidas Guibas, Feng Zhao
Wireless sensor networks have the advantage of spanning a large geographical region and being able to collaboratively detect and track non-local spatio-temporal events. This paper presents the...
Distributed state representation for tracking problems in sensor networks (2004)
Juan Liu, Maurice Chu, Jie Liu, Jim Reich, Feng Zhao
This paper investigates the problem of designing decentralized representations to support monitoring and inferences in sensor networks. State-space models of physical phenomena such as those arising...
Distributed attention in large scale video sensor networks (2004)
Maurice Chu, James Reich, Feng Zhao
As distributed surveillance networks are deployed over larger areas and in increasingly busy environments, limiting the computation, bandwidth, and human attention burdens imposed is becoming...
Roamhba: maintaining group connectivity in sensor networks (2004)
Qing Fang, Jie Liu, Leonidas Guibas, Feng Zhao
This paper presents a new group communication scheme, roamingcast, for collaborative information processing in wireless sensor networks. Roamingcast enables efficient communication among a subset of...
Roamhba: maintaining group connectivity in sensor networks (2004)
Qing Fang, Jie Liu, Leonidas J. Guibas, Feng Zhao
Abstract. This paper presents a new group communication scheme arises from collaborative information processing in wireless sensor networks, roamingcast. Roamingcast enables communication among a...
Jie Liu, Patrick Cheung, Leonidas Guibas, Feng Zhao
A powerful concept to cope with resource limitations and information redundancy in wireless sensor networks is the use of collaboration groups to distill information within the network and to...
Intermediates in the Inactivation and Unfolding of Dimeric Arginine Kinase Induced by GdnHCl (2004)
Guo, Qin, Zhao, Feng, Guo, Zhi, Wang, Xicheng
Equilibrium studies of guanidine hydrochloride (GdnHCl)–induced unfolding of dimeric arginine kinase (AK) from sea cucumber have been performed by monitoring by enzyme activity, intrinsic protein...
Collaborative In-Network Processing for Target Tracking (2003)
Juan Liu, James Reich, Feng Zhao
This paper presents a class of signal processing techniques for collaborative signal processing in ad hoc sensor networks, focusing on a vehicle tracking application. In particular, we study two...
Scaling into Ambient Intelligence (2003)
Twan Basten, Luca Benini, Anantha Ch, Menno Lindwer, Jie Liu, Rex Min, ...
Envision the situation that high quality information and entertainment is easily accessible to anyone, anywhere, at any time, and on any device. How realistic is this vision? And what does it require...
Estimation of distributed hybrid systems using particle filtering methods (2003)
Xenofon Koutsoukos, James Kurien, Feng Zhao
Abstract. Networked embedded systems are composed of a large number of components that interact with the physical world via a set of sensors and actuators, have their own computational capabilities,...
Juan Liu, Jie Liu, James Reich, Patrick Cheung, Feng Zhao
Abstract. The tradeoff between performance and scalability is a fundamental issue in distributed sensor networks. In this paper, we propose a novel scheme to efficiently organize and utilize network...
Scaling into Ambient Intelligence (2003)
Twan Basten, Luca Benini, Anantha Ch, Menno Lindwer, Jie Liu, Rex Min, ...
Envision the situation that high quality information and entertainment is easily accessible to anyone, anywhere, at any time, and on any device. How realistic is this vision? And what does it require...
Physics-Based Encapsulation in Embedded Software for Distributed Sensing and (2003)
Feng Zhao, Chris Bailey-kellogg
Spatial Aggregation abstracts data arising from distributed embedded sensing and control applications as a set of so-called \spatio-temporal objects". Locality and continuity in the...
Jaewon Shin, Leonidas J. Guibas, Feng Zhao
Abstract. This paper presents a scalable distributed algorithm for computing and maintaining multi-target identity information. The algorithm builds on a novel representational framework,...
Collaborative signal and information processing: An information directed approach (2003)
Feng Zhao, Jie Liu, Juan Liu, Leonidas Guibas, James Reich
Abstract — This article describes information-based approaches to processing and organizing spatially distributed, multi-modal sensor data in a sensor network. Energy constrained networked sensing...
Scaling into Ambient Intelligence (2003)
Twan Basten Luca, Luca Benini, Anantha Ch, Menno Lindwer, Jie Liu, Rex Min, ...
Envision the situation that high quality information and entertainment is easily accessible to anyone, anywhere, at any time, and on any device. How realistic is this vision? And what does it require...
Lightweight Sensing and Communication Protocols for Target Enumeration and Aggregation (2003)
Qing Fang, Feng Zhao, Leonidas Guibas
The development of lightweight sensing and communication protocols is a key requirement for designing resource constrained sensor networks. This paper introduces a set of efficient protocols and...
TinyGALS: A Programming Model for Event-Driven Embedded Systems (2003)
Elaine Cheong, Judy Liebman, Jie Liu, Feng Zhao
Networked embedded systems such as wireless sensor networks are usually designed to be event-driven so that they are reactive and power efficient. Programming embedded systems with multiple reactive...
Collaborative signal and information processing: An information directed approach (2003)
Feng Zhao, Jie Liu, Juan Liu, Leonidas Guibas, James Reich
Abstract — This article describes information-based approaches to processing and organizing spatially distributed, multi-modal sensor data in a sensor network. Energy constrained networked sensing...
Lightweight Sensing and Communication Protocols for Target Enumeration and Aggregation (2003)
Qing Fang, Feng Zhao, Leonidas Guibas
The development of lightweight sensing and communication protocols is a key requirement for designing resource constrained sensor networks. This paper introduces a set of efficient protocols and...
Collaborative In-Network Processing for Target Tracking (2003)
Feng Zhao, James Reich, Juan Liu
This paper presents a class of signal processing techniques for collaborative signal processing in ad hoc sensor networks, focusing on a vehicle tracking application. In particular, we study two...
Collaborative In-Network Processing for Target Tracking (2003)
Juan Liu, James Reich, Feng Zhao
This paper presents a class of signal processing techniques for collaborative signal processing in ad hoc sensor networks, focusing on a vehicle tracking application. In particular, we study two...
A laboratory program for data interpretation of core analysis (2002)
Bibliography: p. 120-137
Distributed Diagnosis of Networked, Embedded Systems (2002)
Kurien, James, Koutsoukos, Xenofon, Zhao, Feng
Networked embedded systems are composed of a large number of physically distributed nodes that interact with the physical world via a set of sensors and actuators, have their own computational...
Skeleton-based fingerprint minutiae extraction / (2002)
Thesis (M. Phil.)--Chinese University of Hong Kong, 2002.
Electrode microstructure effects on cathodic polarization in solid oxide fuel cells / (2002)
Thesis (M.S.)--Dept. of Materials Science and Engineering, University of Utah, 2002.
A laboratory program for data interpretation of core analysis (2002)
Bibliography: p. 120-137
Monitoring and diagnosis of hybrid systems using particle filtering methods (2002)
Xenofon Koutsoukos, James Kurien, Feng Zhao
Embedded systems are composed of a large number of components that interact with the physical world via a set of sensors and actuators, have their own computational capabilities, and communicate with...
Maurice Chu, Horst Haussecker, Feng Zhao, Maurice Chu, Horst Haussecker, Feng Zhao
This paper describes two novel techniques, informationdriven sensor querying (IDSQ) and constrained anisotropic diffusion routing (CADR), for energy-efficient data querying and routing in ad hoc...
Secure transactions over the Internet for electronic commerce / (2002)
Thesis (M. Eng.)--Nanyang Technological University, School of Computer Engineering, 2002.
Xu, Xingling, Fong, S. W. Audi, Li, Zhaohui, Loh, Zhi-Heng, Zhao, Feng, Vittal, Jagadese J., ...
Novel electroactive multimetallic compounds based on the {Pt₂(μ₂-S)₂M} core, viz. [Pt₂(PPh₃)₄(μ₃-S)₂HgFc]PF₆ (1) [Fc = (η⁵-C₅H₄)Fe(η⁵-C₅H₅)] and...
Exploiting Physical Layer Power Control Mechanisms (2001)
Marco Gruteser, Marco Gruteser, Ashish Jain, Ashish Jain, Jing Deng, Jing Deng, ...
Mobile computing relies on low-power communication. Since ad-hoc networks are often idle, many researchers have investigated mechanisms to reduce idle power. This paper presents power measurements on...
Chris Bailey-kellogg, Feng Zhao
distribution over a semiconductor wafer and controlling the noise from a photocopy machine, require interpreting distributed data and designing decentralized controllers for spatially distributed...
Chris Bailey-kellogg, Feng Zhao
Many important science and engineering applications, such as regulating the temperature distribution over a semiconductor wafer and controlling the noise from a photocopy machine, require...
Exploiting Physical Layer Power Control Mechanisms (2001)
Marco Gruteser, Marco Gruteser, Ashish Jain, Ashish Jain, Jing Deng, Jing Deng, ...
Copyright c 2001 by
Exploiting Physical Layer Power Control Mechanisms (2001)
Marco Gruteser, Marco Gruteser, Ashish Jain, Ashish Jain, Jing Deng, Jing Deng, ...
Copyright c 2001 by
Fault modeling for monitoring and diagnosis of sensor-rich hybrid systems (2001)
Xenofon Koutsoukos, Feng Zhao, Horst Haussecker, Jim Reich, Patrick Cheung
This paper presents a framework for modeling faults in hybrid systems that leads to an efficient approach for monitoring and diagnosis of real-time embedded systems. We describe a fault...
Fault Modeling for Monitoring and Diagnosis of Sensor-Rich Hybrid Systems (2001)
Xenofon Koutsoukos, Feng Zhao, Horst Haussecker, Jim Reich, Patrick Cheung
This paper presents a framework for modeling faults in hybrid systems that leads to an efficient approach for monitoring and diagnosis of real-time embedded systems. We describe a fault...
Current-mode circuit technique for SenseFET application in BLDC drive (2000)
grantor: University of Toronto
Fault isolation in hybrid systems combining model based diagnosis and signal processing (2000)
Sriram Narasimhan, Feng Zhao, Gautam Biswas, Elmer Hung
Abstract. Sensor-rich systems typically employ extensive signal processing techniques for fault detection and isolation tasks. Sensor-poor systems, on the other hand, require system models and...
Thesis (M.S.)--University of Nebraska--Lincoln, 1999.
Intelligent simulation tools for mining large scientific data sets (1999)
Feng Zhao, Chris Bailey-Kellogg, Xingang Huang, Ivan Ordonez
This paper describes problems, challenges, and opportunities for intelligent simulation of physical systems. Prototype intelligent simulation tools have been constructed for interpreting massive data...
Feng Zhao, Chris Bailey-kellogg, Xingang Huang, O Nez
This paper describes problems, challenges, and opportunities for intelligent simulation of physical systems. Prototype intelligent simulation tools have been constructed for interpreting massive data...
Intelligent Simulation Tools for Mining Large Scientific Data Sets (1999)
Feng Zhao, Chris Bailey-kellogg, Xingang Huang, O Nez
This paper describes problems, challenges, and opportunities for intelligent simulation of physical systems. Prototype intelligent simulation tools have been constructed for interpreting massive data...
Diagnostic Information Processing for Sensor-Rich Distributed Systems (1999)
This paper describes a diagnostic system for processing high-bandwidth vibration data from distributed sensors for monitoring and diagnosis of electromechanical machines. The system employs...
An O(N) Algorithm for Three-Dimensional N-Body Simulations. (1998)
The author presents an algorithm that computes the gravitational potentials and forces on N point-masses interacting in three-dimensional space. The algorithm, based on analytical techniques...
Machine Recognition as Representation and Search. (1998)
Generality, representation, and control have been the central issues in machine recognition. Model-based recognition is the search for consistent matches of the model and image features. We present a...
We develop a novel autonomous control synthesis strategy called Phase Space Navigator for nonlinear control systems, with which a controller for a nonlinear system can be automatically synthesized in...
Extracting and Representing Qualitative behaviors of Complex Systems in Phase Spaces. (1998)
We develop a qualitative method for understanding and representing phase space structures of complex systems. To demonstrate this method, a program has been constructed that understands qualitatively...
Automatic Design of a Maglev Controller in State Space. (1998)
We describe the automatic synthesis of a global nonlinear controller for stabilizing a magnetic levitation system a simplified model for the German Transrapid system. A systematic state-space design...
This thesis presents a novel design methodology for the synthesis of automatic controllers, together with a computational environment-the Control Engineer's Workbench-integrating a suite of programs...
The goal of this research is to develop high-performance computational tools for designing control systems for a class of complex physical systems. (1) Developed a verification algorithm for...
Qualitative analysis of distributed physical systems with applications to control synthesis (1998)
Christopher Bailey-kellogg, Feng Zhao
Many important physical phenomena, such as temperature distribution, air flow, and acoustic waves, are described as continuous, distributed parameter fields. Analyzing and controlling these physical...
Reasoning About and Optimizing Distributed Parameter Physical Systems Using Influence Graphs (1998)
Christopher Bailey-Kellogg, Feng Zhao
We develop the influence graph mechanism for reasoning about and optimizing decentralized controls for distributed parameter physical systems. Distributed parameter systems, such as air flow around...
Finding Structures in Weather Maps (1998)
We describe an effective computational method for extracting structural information from spatial data sets. For instance, the structural information such as the location, shape, size, and movement...
Verification Of Control Laws Using Phase-Space Geometric Modeling Of Dynamical Systems (1998)
: This paper presents an algorithm for verifying control laws using phase-space geometric modeling of dynamical systems. The algorithm evolves a hierarchically-refined bound of system nonlinear...
Research results include: (1) Developed empirical performance criteria for characterizing stabilities and robustness of the maglev control experimental system and completed a preliminary...
Optical Image Correlation Using Wavelength Multiplexed Volume Holograms. (1997)
An optical image correlator using a spatial light modulator (SLM) for reference image recording and correlation readout has been demonstrated. The reference image correlation filters are recorded in...
Spatial aggregation: Modeling and controlling physical fields (1997)
Christopher Bailey-kellogg, Feng Zhao
Many important physical phenomena, such as temperature distribution, air flow, and acoustic waves, are described as continuous, distributed parameter fields. Controlling and optimizing these physical...
Phase-Space Nonlinear Control Toolbox: The Maglev Experience (1997)
Feng Zhao, Shiou C. Loh, Jeff A. May
We describe the Phase-Space Nonlinear Control Toolbox, a suite of computational tools for synthesizing and evaluating control laws for a broad class of nonlinear dynamical systems. The Toolbox...
Spatial Aggregation: Modeling and controlling physical fields (1997)
Christopher Bailey-Kellogg, Feng Zhao
Many important physical phenomena, such as temperature distribution, air flow, and acoustic waves, are described as continuous, distributed parameter fields. Controlling and optimizing these physical...
Phase-Space Nonlinear Control Toolbox: The Maglev Experience (1997)
Feng Zhao, Shiou C. Loh, Jeff A. May
We describe the Phase-Space Nonlinear Control Toolbox, a suite of computational tools for synthesizing and evaluating control laws for a broad class of nonlinear dynamical systems. The Toolbox...
A Computational Analysis of the Reachability Problem for a Class of Hybrid Dynamical Systems (1997)
. Hybrid systems possess continuous dynamics defined within regions of state spaces and discrete transitions among the regions. Many practical control verification and synthesis tasks can be reduced...
ZHAO, FENG, MAYURA, KITTANE, KOCUREK, NATHAN, EDWARDS, JOHN F., KUBENA, LEON F., SAFE, STEPHEN H., ...
3,3′,4,4′,5-Pentachlorobiphenyl (pentaCB) caused a dose-dependent induction of chicken embryolethality, malformations, edema, and liver lesions at doses ranging from 0.5 to 12.0 μg/kg. In...
Vita.
Adaptive Simulation and Control of Variable-Structure Control Systems in Sliding Regimes (1996)
Conventional simulation and control methods for sliding mode control systems are limited by the available sampling bandwidth and allowable tracking error. Consequently, these methods suffer from...
Spatial Aggregation: Theory and Applications (1996)
Visual thinking plays an important role in scientific reasoning. Based on the research in automating diverse reasoning tasks about dynamical systems, nonlinear controllers, kinematic mechanisms, and...
Spatial Aggregation: Language and Applications (1996)
Christopher Bailey-Kellogg, Feng Zhao, Kenneth Yip
Spatial aggregation is a framework for organizing computations around image-like, analogue representations of physical processes in data interpretation and control tasks. It conceptualizes common...
Spatial Aggregation: Language and Applications (1996)
Christopher Bailey-Kellogg, Feng Zhao, Kenneth Yip
This paper describes the spatial aggregation language and its applications. Spatial aggregation is a framework for organizing computations around imagelike, analogue representations of physical...
John F. Kolen, John F. Kolen, Feng Zhao, Feng Zhao
We consider a class of three-dimensional dynamical systems whose state spaces are defined by piecewise constant vector fields and whose trajectories never return to a state-space region once they...
Spatial Aggregation: Theory and Applications (1996)
Visual thinking plays an important role in scientific reasoning. Based on the research in automating diverse reasoning tasks about dynamical systems, nonlinear controllers, kinematic mechanisms, and...
Spatial Aggregation: Theory and Applications (1996)
Visual thinking plays an important role in scienti c reasoning. Based on the research in automating diverse reasoning tasks about dynamical systems, nonlinear controllers, kinematic mechanisms, and...
Spatial Aggregation: Theory and Applications (1996)
Visual thinking plays an important role in scienti c reasoning. Based on the researchin automating diverse reasoning tasks about dynamical systems, nonlinear controllers, kinematic mechanisms, and...
Spatial Aggregation: Language and Applications (1996)
Christopher Bailey-kellogg, Feng Zhao
This paper describes the spatial aggregation language and its applications. Spatial aggregation comprises a framework and a mechanism for organizing computations around image-like, analogue...
Intelligent Simulation in Designing Complex Dynamic Control Systems (1995)
We develop and demonstrate an autonomous control synthesis system called Phase Space Navigator for nonlinear control systems, with which a global, nonlinear controller for a dynamical system can be...
Spatial Aggregate: Theory and Application to Qualitative Physics (1995)
Effective reasoning about a physical system requires an appropriate mapping from the system characteristics to abstractions that match the impedance of the task at hand. In Qualitative Physics, three...
Adaptive Simulation and Control of Variable-Structure Control Systems in Sliding Regimes (1995)
Conventional simulation and control methods for sliding mode control systems are limited by the available sampling bandwidth and allowable tracking error. Consequently, these methods suffer from...
Intelligent Computing About Complex Dynamical Systems (1994)
We develop computational mechanisms for intelligently simulating nonlinear control systems. These mechanisms enhance numerical simulations with deep domain knowledge of dynamical systems theory and...
Extracting and Representing Qualitative Behaviors of Complex Systems in Phase Spaces (1994)
This paper presents a computational method for automatically analyzing qualitative behaviors of complex dynamical systems in phase space. To demonstrate this method, a program called MAPS has been...
Maurice Chu, Sanjoy Mitter, Feng Zhao
We introduce a general information architecture for designing distributed inference algorithms in ad hoc sensor networks to support applications that monitor multiple, dynamic physical phenomena in a...
Automatic Analysis and Synthesis of Controllers for Dynamical Systems Based On P (1992)
I present a novel design methodology for the synthesis of automatic controllers, together with a computational environment---the Control Engineer's Workbench---integrating a suite of programs that...
Automatic Analysis and Synthesis of Controllers for Dynamical Systems Based On P (1992)
I present a novel design methodology for the synthesis of automatic controllers, together with a computational environment---the Control Engineer's Workbench---integrating a suite of programs that...
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1992.
Cover title.
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1992.
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1992.
Automatic design of a maglev controller in state space (1992)
Feng Zhao, Feng Zhao, Richard Thornton, Richard Thornton
We describe the automatic synthesis of a global nonlinear controller for stabilizing a magnetic levitation system--a simplified model for the German Transrapid system. A systematic state-space design...
Automatic Design of a Maglev Controller in State Space (1991)
We describe the automatic synthesis of a global nonlinear controller for stabilizing a magnetic levitation system. The synthesized control system can stabilize the maglev vehicle with large initial...
Automatic Design of a Maglev Controller in State Space (1991)
We describe the automatic synthesis of a global nonlinear controller for stabilizing a magnetic levitation system. The synthesized control system can stabilize the maglev vehicle with large initial...
We develop a novel autonomous control synthesis strategy called Phase Space Navigator for the automatic synthesis of nonlinear control systems. The Phase Space Navigator generates global control laws...
We develop a novel autonomous control synthesis strategy called Phase Space Navigator for the automatic synthesis of nonlinear control systems. The Phase Space Navigator generates global control laws...
Extracting and Representing Qualitative Behaviors of Complex Systems in Phase Spaces (1991)
We develop a qualitative method for understanding and representing phase space structures of complex systems and demonstrate the method with a program, MAPS --- Modeler and Analyzer for Phase Spaces,...
Extracting and Representing Qualitative Behaviors of Complex Systems in Phase Spaces (1991)
We develop a qualitative method for understanding and representing phase space structures of complex systems and demonstrate the method with a program, MAPS --- Modeler and Analyzer for Phase Spaces,...
The Parallel Multipole Method on the Connection Machine (1991)
R Fl, Feng Zhao, S. Lennart Johnsson
This paper reports on a fast implementation of the three-dimensional nonadaptive Parallel Multipole Method (PMM) on the Connection Machine system model CM--2. The data interactions within the...
Artificial Intelligence (1991)
Extracting and representing qualitative behaviors of complex systems in phase space *
The parallel multipole method on the Connection Machine (1991)
Feng Zhao, S. Lennart Johnssont
Abstract. This paper reports on a fast implementation of the three-dimensional nonadaptive Parallel Multipole Method (PMM) on the Connection Machine system model CM—2. The data interactions within...
Machine Recognition as Representation and Search (1989)
Generality, representation, and control have been the central issues in machine recognition. Model-based recognition is the search for consistent matches of the model and image features. We present a...
Machine Recognition as Representation and Search (1989)
Generality, representation, and control have been the central issues in machine recognition. Model-based recognition is the search for consistent matches of the model and image features. We present a...
An O(N) Algorithm for Three-Dimensional N-Body Simulations (1987)
We develop an algorithm that computes the gravitational potentials and forces on N point-masses interacting in three-dimensional space. The algorithm, based on analytical techniques developed by...
An O(N) Algorithm for Three-Dimensional N-Body Simulations (1987)
We develop an algorithm that computes the gravitational potentials and forces on N point-masses interacting in three-dimensional space. The algorithm, based on analytical techniques developed by...
An O̳(N̳) algorithm for three-dimensional N̳-body simulations (1987)
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1988.
An O̳(N̳) algorithm for three-dimensional N̳-body simulations /--by Feng Zhao. (1987)
Characters preceded by a double underscore appear as italic on title page.
An O̳(N̳) algorithm for three-dimensional N̳-body simulations (1987)
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1988.
Interest Rate Caps Smile Too! But Can the LIBOR Market Models Capture It?
Feng Zhao, Robert Jarrow, Haitao Li
Using more than two years of daily interest rate cap price data, this paper provides a systematic documentation of a volatility smile in cap prices. We find that Black (1976) implied volatilities...
Novel TFAP2B Mutations That Cause Char Syndrome Provide a Genotype-Phenotype Correlation
Zhao, Feng, Weismann, Constance G., Satoda, Masahiko, Pierpont, Mary Ella M., Sweeney, Elizabeth, Thompson, Elizabeth M., ...
To elucidate further the role, in normal development and in disease pathogenesis, of TFAP2B, a transcription factor expressed in neuroectoderm, we studied eight patients with Char syndrome and their...
Novel TFAP2B Mutations That Cause Char Syndrome Provide a Genotype-Phenotype Correlation
Zhao, Feng, Weismann, Constance G., Satoda, Masahiko, Pierpont, Mary Ella M., Sweeney, Elizabeth, Thompson, Elizabeth M., ...
To elucidate further the role, in normal development and in disease pathogenesis, of TFAP2B, a transcription factor expressed in neuroectoderm, we studied eight patients with Char syndrome and their...
Topouchian, Jirar, El Feghali, Ramzi, Pannier, Bruno, Wang, Shuyu, Zhao, Feng, Smetana, Karel, ...
The degree of arterial stiffness is correlated with the risk of cardiovascular diseases and it is a powerful predictor for morbidity and mortality. Studies have shown that arterial stiffness...
Unspanned Stochastic Volatility: Evidence from Hedging Interest Rate Derivatives
Most existing dynamic term structure models assume that interest rate derivatives are redundant securities and can be perfectly hedged using solely bonds. We find that the quadratic term structure...
Interest Rate Caps "Smile" Too! But Can the LIBOR Market Models Capture the Smile?
ROBERT JARROW, HAITAO LI, FENG ZHAO
Using 3 years of interest rate caps price data, we provide a comprehensive documentation of volatility smiles in the caps market. To capture the volatility smiles, we develop a multifactor term...
Michel, Sebastian, Salehi, Ali, Luo, Liqian, Dawes, Nicholas, Aberer, Karl, Barrenetxea, Guillermo, ...
A sensor network data gathering and visualization infrastructure is demonstrated, comprising of Global Sensor Networks (GSN) middleware and Microsoft SensorMap. Users are invited to actively...
Domestic violence in rural Uganda: evidence from a community-based study.
Koenig, Michael A., Lutalo, Tom, Zhao, Feng, Nalugoda, Fred, Wabwire-Mangen, Fred, Kiwanuka, Noah, ...
Although domestic violence is an increasing public health concern in developing countries, evidence from representative, community-based studies is limited. In a survey of 5109 women of reproductive...