X. Hu

Publication List Details

Period

1996 - 2008

Number

113

Co-Authors

Universal Scaling of Pinning Effect on Hall Anomaly near the Vortex Glass Transition and Doping Dependence Problems of Superconductors (2008)

He, L., Hu, X., Yin, L., Xu, H. Y., Xu, X. L., Guo, J. D., ...

We find universal scaling relations of the pinning effect on the Hall resistivity $\rho_{xy}$ and Hall angle $\theta_{H}$. Considering the extended power law form of $\rho_{xx}$ and the microscopic...

A Study on Design Parameters of Stirling Engines for Buildings (2006)

Ding, G., Huang, S., Zhang, C., Hu, X., Zhang, X.

One of the most promising projects in the application of combined heat and power(CHP) lies in energy production for buildings. Stirling engines are very applicable to residential buildings,...

Familial amyotrophic lateral sclerosis with frontotemporal dementia is linked to a locus on chromosome 9p13.2-21.3 (2006)

Vance, C., Al-Chalabi, A., Ruddy, D., Smith, B.N., Hu, X., Sreedharan, J., ...

Amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD) are both relentlessly progressive and ultimately fatal neurological disorders. ALS is familial in similar to 10% of cases and FTD...

A Study on Design Parameters of Stirling Engines for Buildings (2006)

Ding, G., Huang, S., Zhang, C., Hu, X., Zhang, X.

One of the most promising projects in the application of combined heat and power(CHP) lies in energy production for buildings. Stirling engines are very applicable to residential buildings,...

Elasticity and piezoelectricity of zinc oxide crystals, single layers, and possible single-walled nanotubes (2005)

Tu, Z. C., Hu, X.

The elasticity and piezoelectricity of zinc oxide (ZnO) crystals and single layers are investigated from the first-principles calculations. It is found that a ZnO thin film less than three Zn-O...

Scaling of Nonlinear Longitudinal and Hall Resistivities near the Vortex Glass Transition (2005)

Hu, X., He, L., Yin, L., Ning, Z. H., Xu, H. Y., Xu, X. L., ...

We show that the longitudinal current-voltage characteristics of superconductors in mixed state have the general form of extended power law. Isotherms simulated from this nonlinear equation fit the...

Impairment of specific episodic memory processes by sub-psychotic doses of ketamine: The effects of levels of processing at encoding and of the subsequent retrieval task (2005)

Honey, G.D., Honey, R.A.E., Sharar, S.R., Turner, D.C., Pomarol-Clotet, E., Kumaran, D., ...

Rationale The precise nature of the impact of the N-methyl-d-aspartate antagonist, ketamine, upon human episodic memory, has yet to be elucidated fully. Objectives This study sought to assess the...

Josephson vortex lattice melting in Bi-2212 probed by commensurate oscillations of Josephson flux-flow (2005)

Latyshev, Yu. I., Pavlenko, V. N., Orlov, A. P., Hu, X.

We studied the commensurate semi-fluxon oscillations of Josephson flux-flow (JFF) in a Bi-2212 stacked structures near $T_c$ as a probe of melting of Josephson vortex lattice (JVL). We found that...

Theoretical determination of the necessary conditions for the formation of ZnO nanorings and nanohelices (2005)

Tu, Z. C., Li, Q. X., Hu, X.

The formation of ZnO nanorings and nanohelices with large polar surfaces observed in experiments [Nano Lett. 3, 1625 (2003); J. Am. Chem. Soc. 126, 6703 (2004)] is shown to be a result of the...

Molecular Motor Constructed from a Double-Walled Carbon Nanotube Driven by Axially Varying Voltage (2005)

Tu, Z. C., Hu, X.

A new molecular motor is conceptually constructed from a double-walled carbon nanotube (DWNT) consisting of a long inner single-walled carbon nanotube (SWNT) and a short outer SWNT with different...

Random Restarts in Global Optimization (2004)

X. Hu, M. C. Spruill, R. Shonkwiler

In this article we study stochastic multistart methods for global optimization, which combine local search with random initialization, and their parallel implementations. It is shown that in a...

Critical Scaling of Extended Power Law I-V Isotherms near Vortex Glass Transition (2004)

Ning, Z. H., Hu, X., Chen, K. X., Yin, L., Lu, G., Xu, X. L., ...

In view of the question about the vortex glass theory of the freezing of disordered vortex matter raised by recent experimental observations we reinvestigate the critical scaling of high $T_c$...

Silicon-based spin quantum computation and the shallow donor exchange gate (2004)

Koiller, Belita, Capaz, R. B., Hu, X., Sarma, S. Das

Proposed silicon-based quantum-computer architectures have attracted attention because of their promise for scalability and their potential for synergetically utilizing the available resources...

Spin and interaction effects in Shubnikov-de Haas oscillations and the quantum Hall effect in GaN/AlGaN heterostructures (2004)

Knap, W., Fal'ko, V. I., Frayssinet, E., Lorenzini, P., Grandjean, N., Maude, D., ...

We present the results of high magnetic field (up to 30 T) and temperature (50 mK-80 K) dependent transport measurements on a 2DEG in GaN/AlGaN heterojunctions. A high mobility (above 60000 cm(2) V-1...

Estimating Brain Compliance Based on a Novel Model of Intracranial (2002)

X. Hu, A. A. Alwan, V. I. Nenov, E. H. Rubinstein, M. Bergsneidcr

The assumption that cerebrospinal fluid (CSF) inflow and outflow is an essential element of an intracranial compartment (IC) model has been recently questioned 131. The idea proposed in I3] that the...

Correction of Physiologically Induced Global Off-Resonance Effects in Dynamic Echo-Planar and Spiral Functional Imaging (2002)

Pfeuffer, J., Ugurbil, K., Hu, X., Glover, G.H.

To decrease noise from respiration induced phase and frequency fluctuations, a simple correction of the "Dynamic Off-Resonance in K-space" (DORK) was developed. The correction uses phase information...

Spatial Dependence of the Nonlinear BOLD Response at Short Stimulus Duration (2002)

Pfeuffer, J., McCullough, J.C., Van De Moortele, P.-F., Ugurbil, K., Hu, X.

Non-linearities in the measured BOLD data were found for the response integral and width. With the high sensitivity at 7T, a voxel-based analysis was feasible and was used to investigate the spatial...

Perfusion-based High-Resolution Functional Imaging in the Human Brain at 7 Tesla (2002)

Pfeuffer, J., Adriany, G., Shmuel, A., Yacoub, E., Hu, X., ...

In this paper, CBF-based functional imaging is reported at sub-millimeter resolution (0.9 mm) in humans for the first time. High sensitivity was made possible by signal-to-noise gains at the high...

Correction of Physiologically-Induced Global Off-Resonance Effects in Dynamic Echo-Planar and Spiral Functional Imaging (2002)

Pfeuffer, J., Ugurbil, K., Hu, X., Glover, G.H.

In functional magnetic resonance imaging, a rapid method such as echo-planar (EPI) or spiral is used to collect a dynamic series of images. These techniques are sensitive to changes in resonance...

Zoomed Functional Imaging in the Human Brain at 7 Tesla with Simultaneous High Spatial and High Temporal Resolution (2002)

Pfeuffer, J., Yacoub, E., Shmuel, A., Adriany, G., Andersen, P., ...

Functional neuroimaging in the human brain using non-invasive magnetic resonance methods has the potential of providing highly resolved maps of neuronal activation. Decreasing the voxel size and...

Perfusion-based High-Resolution Functional Imaging in the Human Brain at 7 Tesla (2002)

Pfeuffer, J., Adriany, G., Shmuel, A., Yacoub, E., Hu, X., ...

Perfusion-based magnetic resonance imaging measures cerebral blood flow (CBF) at the capillary level and can be used for functional studies based on the tight spatial coupling between brain activity...

A Framework for User Assisted Design Space Exploration (2001)

X. Hu, G. W. Greenwood, S. Ravichandran, G. Quan

Much effort in hardware/software co-design has been devoted to developing "push-button" types of tools for automatic hardware/software partitioning. However, given the highly complex nature of...

Copper/MCM-41 as catalyst for the wet oxidation of phenol (2001)

Wu, Q, Hu, X, Yue, PL, Zhao, XS, Lu, GQ

A heterogeneous copper catalyst supported on mesoporous MCM-41 was developed. The parent MCM-41 has a large pore area of over 1400 m(2)/g. Copper was chosen as the active element of catalyst and...

Organophilicity of MCM-41 adsorbents studied by adsorption and temperature-programmed desorption (2001)

Zhao, XS, Lu, GQ, Hu, X

In this paper, the organophilic property of MCM-41 was studied and compared with hydrophobic silicalite-l using adsorption and temperature-programmed desorption (TPD) methods. The surface...

Discrimination of adsorption kinetic models for the description of hydrocarbon adsorption in activated carbon (2001)

Wang, K., Qiao, S., Hu, X., Do, D. D.

Five kinetic models for adsorption of hydrocarbons on activated carbon are compared and investigated in this study. These models assume different mass transfer mechanisms within the porous carbon...

A Hybrid Control Approach To Action Coordination For Mobile Robots (2000)

M. Egerstedt, X. Hu, A. Stotsky

: In this paper, the problem of how to integrate different robotic actions, within a behavior-based framework, is investigated. The case we study is the obstacle negotiation problem, and our approach...

Control of a Car-Like Robot Using a Virtual Vehicle Approach (2000)

M. Egerstedt, X. Hu, A. Stotsky

A solution to the problem of controlling a car-like nonholonomic robot is proposed using a "virtual" vehicle approach, which is shown to be robust with respect to errors and disturbances. The...

Characterization of the structural and surface properties of chemically modified MCM-41 material (2000)

Zhao, X. S., Lu, G. Q., Hu, X.

Mesoporous Mobil catalytic materials of number 41 (MCM-41) silica was chemically modified using both inorganic and organic precursors and characterized using the techniques, XRD, XPS, MAS NMR, FTIR,...

A Hybrid Control Approach To Action Coordination For Mobile Robots (1999)

M. Egerstedt, X. Hu, A. Stotsky

: In this paper, the problem of how to integrate different robotic actions, within a behavior-based framework, is investigated. The case we study is the obstacle negotiation problem, and our approach...

A novel method for tailoring the pore-opening size of MCM-41 materials (1999)

Zhao, X.S., Lu, G., Hu, X.

A novel pore tailoring method is proposed by which the pore-opening sizes of MCM-41 materials can be finely tuned without significant loss in pore volume and surface area.

Control of a Car-Like Robot Using a Virtual Vehicle Approach (1998)

M. Egerstedt, X. Hu, A. Stotsky

A solution to the problem of controlling a car-like nonholonomic robot is proposed using a "virtual" vehicle approach, which is shown to be robust with respect to errors and disturbances. The...

Phase Diagram of a Superconducting and Antiferromagnetic System with SO(5) Symmetry (1998)

Hu, X., Koyama, T., Tachiki, M.

Temperature vs. chemical-potential phase diagrams of an SO(5) model for high-(T_c) cuprates are calculated by Monte Carlo simulation. There is a bicritical point where the second-order...

Control of a Car-Like Robot Using a Dynamic Model (1998)

M. Egerstedt, X. Hu, A. Stotsky

A solution to the problem of controlling a car-like nonholonomic robot is proposed using a "virtual" vehicle approach, which is shown to be robust with respect to errors and disturbances. The...

Dealing With Impreciseness In Architectural Synthesis (1998)

Chantana Chantrapornchai, Sissades Tongsima, Sha Sharon, X. Hu

In this paper, we propose a design exploration framework for architectural synthesis which can handle impreciseness occurred during the design process. The impreciseness may be caused by the lack of...

Dealing With Impreciseness In Architectural Synthesis (1998)

Chantana Chantrapornchai, Sissades Tongsima, Sha Sharon, X. Hu

In this paper, we propose a design exploration framework for architectural synthesis which can handle impreciseness occurred during the design process. The impreciseness may be caused by the lack of...

Dealing With Impreciseness In Architectural Synthesis (1998)

Chantana Chantrapornchai, Sissades Tongsima, Sha Sharon, X. Hu

In this paper, we propose a design exploration framework for architectural synthesis which can handle impreciseness occurred during the design process. The impreciseness may be caused by the lack of...

Dealing with Imprecise Timing Information in Architectural Synthesis (1998)

Chantana Chantrapornchai, Sha Sharon, X. Hu

In this paper, we propose a framework for design exploration in architectural synthesis which takes imprecise timing information into account. Impreciseness in the architectural synthesis usually...

Dealing with Imprecise Timing Information in (1998)

Chantana Chantrapornchai, Sha Sharon, X. Hu

In this paper, we propose a framework for design exploration in architectural synthesis which takes imprecise timing information into account. Impreciseness in the architectural synthesis usually...

Path Planning and Robust Tracking for A Car-Like Robot (1998)

M. Egerstedt, X. Hu, H. Rehbinder, A. Stotsky

. In this paper the problem of path planning and path following for a car-like robot is considered. Some new algorithms are proposed, which, by experiments, have been proven to be quite robust. 1...

Minimizing The Number Of Delay Buffers In The Synchronization Of Pipelined Systems (1997)

X. Hu, General Motors

When designing a pipelined digital system, delay buffers (often implemented as shift registers) are usually introduced into the system in order to synchronize the various signals impinging on each...

Phonon Squeezed States Generated by Second Order Raman Scattering (1997)

Hu, X., Nori, Franco

We study squeezed states of phonons, which allow a reduction in the quantum fluctuations of the atomic displacements to below the zero-point quantum noise level of coherent phonon states. We...

Quantum Phonon Optics: Coherent and Squeezed Atomic Displacements (1996)

Hu, X., Nori, Franco

In this paper we investigate coherent and squeezed quantum states of phonons. The latter allow the possibility of modulating the quantum fluctuations of atomic displacements below the zero-point...