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Search Results: 1 - 10 of 419486 matches for " M. Song "
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Multi-Band Rectangular Patch End-Fire Antenna Array  [PDF]
Liza M. Resley, Heather H. Song
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2013, DOI: 10.4236/jemaa.2013.52010

A novel multi-band end-fire antenna array was designed, fabricated, and characterized. Analytical calculations were carried out to determine the critical antenna dimensions and the design was optimized using a 3D electromagnetic finite-element solver. The measured results were in good agreement with the designed results. The proposed antenna array exhibits multi-band capabilities which can be potentially used for applications that require a multi-band end-fire radiation pattern.

Martingale representation property in progressively enlarged filtrations
M. Jeanblanc,S. Song
Mathematics , 2012,
Abstract: Consider $\mathbb{G}$ the progressive enlargement of a filtration $\mathbb{F}$ with a random time $\tau$. Assuming that, in $\mathbb{F}$, the martingale representation property holds, we examine conditions under which the martingale representation property holds also in $\mathbb{G}$. A general methodology is developed in this paper, with results covering every known (classical or recent) examples.
A Retrospective Study of Paediatric Dental Patients Treated under General Anesthesia  [PDF]
Rawan M. Bader, Guangtai Song, Eyad Y. Almuhtaseb
International Journal of Clinical Medicine (IJCM) , 2013, DOI: 10.4236/ijcm.2013.47A2005
Abstract: Dental care under general anesthesia (DGA) was found to be a safe, efficient and effective quality treatment for children. Purpose: To describe the characteristics of child dental patients treated under DGA and describe the indications of the treatments and types of treatments provided. Method: The sample consisted of 40 patients treated under DGA at Department of Paediatric Dentistry of school and Hospital of Stomatology of Wuhan University between June 2011 and December 2012. Detailed information was collected from dental records. SPSS software package was used for statistical analysis. Results: The age of the patients ranged from 2.5 years to 24.1 years. Males were more common than females M:F 1.5:1 .The mental retardation patients accounted for (5%) of the sample. The most common indication was inability to cooperate and accept dental treatment under local anesthesia (95%). The treatments rendered included: caries restorations (37%), root canal treatments (34%), extractions (7%), fluoride application (6%), fissure sealants (6%), indirect pulp capping (5%), stainless steel crowns (4%), pulpotomies (0.8%) and labial frenectomy (0.1%). In the follow-up visit fillings were found to be lost in 3 patients, with 2 anterior teeth and one posterior tooth. Conclusion: Caries restoration and root canal treatments were the most common treatments provided. Preventive strategies should be targeted toward children to reduce the number of healthy children receiving treatment under general anesthesia.
Stability of Analytic and Numerical Solutions for Differential Equations with Piecewise Continuous Arguments
Minghui Song,M. Z. Liu
Abstract and Applied Analysis , 2012, DOI: 10.1155/2012/258329
Abstract: In this paper, the asymptotic stability of the analytic and numerical solutions for differential equations with piecewise continuous arguments is investigated by using Lyapunov methods. In particular, the linear equations with variable coefficients are considered. The stability conditions of the analytic solutions of those equations and the numerical solutions of the -methods are obtained. Some examples are illustrated.
Ab Initio Calculation of the Elastic and Optical Properties of Al3Sc Compound

M Song,DH Xiao,

金属学报(英文版) , 2007,
Abstract: The ab initio method has been performed to explore the elastic and optical properties of Al3Sccompound, based on a plane wave pseudopotential method. It can be seen that the calculatedequilibrium lattice parameter and elastic constants are in reasonable agreement with the previousexperimental data. The elastic constants satisfy the requirement for mechanical stability in the cubicstructure of the Al3Sc compound. The optical property calculations show that a strong absorptivepeak exists from 0-15eV and a relative small absorptive peak exists around 30eV. The form iscaused by the optical transitions between high s, p, and d bands, and the latter results from theoptical transitions from high s, p, and d bands to the low 2p band.
Input-Output Hidden Markov Model-Based On-Line Monitoring for Batch Operation
J. Chen,C. M. Song
Lecture Notes in Engineering and Computer Science , 2009,
Dilepton production from resonance scattering in hot hadronic matter
Chungsik Song,C. M. Ko
Physics , 1995, DOI: 10.1103/PhysRevC.53.2371
Abstract: Dilepton production from resonance scattering in hot hadronic matter is studied. Including the widths of these resonances, which enhance the phase space for dilepton production, we find that the production rate is significantly increased if a resonance appears in the extended phase space. For the reaction $\pi+\rho\to l^++l^-$, the finite $\rho$ meson width extends the invariant mass below the $\omega$-meson mass, so a peak at the $\omega$ meson mass is seen in the dilepton spectrum. Similarly, a $\rho$-meson peak appears in the reaction $\rho+\rho\to l^++l^-$. On the other hand, the effect of particle widths in the reaction $\pi+a_1\to l^++l^-$ is small since the extended phase space does not include any resonance.
Effects of Nanoparticle Geometry and Size Distribution on Diffusion Impedance of Battery Electrodes
J. Song,M. Z. Bazant
Physics , 2012,
Abstract: The short diffusion lengths in insertion battery nanoparticles render the capacitive behavior of bounded diffusion, which is rarely observable with conventional larger particles, now accessible to impedance measurements. Coupled with improved geometrical characterization, this presents an opportunity to measure solid diffusion more accurately than the traditional approach of fitting Warburg circuit elements, by properly taking into account the particle geometry and size distribution. We revisit bounded diffusion impedance models and incorporate them into an overall impedance model for different electrode configurations. The theoretical models are then applied to experimental data of a silicon nanowire electrode to show the effects of including the actual nanowire geometry and radius distribution in interpreting the impedance data. From these results, we show that it is essential to account for the particle shape and size distribution to correctly interpret impedance data for battery electrodes. Conversely, it is also possible to solve the inverse problem and use the theoretical "impedance image" to infer the nanoparticle shape and/or size distribution, in some cases, more accurately than by direct image analysis. This capability could be useful, for example, in detecting battery degradation in situ by simple electrical measurements, without the need for any imaging.
Electrochemical Impedance of a Battery Electrode with Anisotropic Active Particles
J. Song,M. Z. Bazant
Physics , 2013,
Abstract: Electrochemical impedance spectra for battery electrodes are usually interpreted using models that assume isotropic active particles, having uniform current density and symmetric diffusivities. While this can be reasonable for amorphous or polycrystalline materials with randomly oriented grains, modern electrode materials increasingly consist of highly anisotropic, single-crystalline, nanoparticles, with different impedance characteristics. In this paper, analytical expressions are derived for the impedance of anisotropic particles with tensorial diffusivities and orientation-dependent surface reaction rates and capacitances. The resulting impedance spectrum contains clear signatures of the anisotropic material properties and aspect ratio, as well as statistical variations in any of these parameters.
Strong, Ultra-narrow Peaks of Longitudinal and Hall Resistances in the Regime of Breakdown of the Quantum Hall Effect
A. M. Song,P. Omling
Physics , 2000, DOI: 10.1103/PhysRevLett.84.3145
Abstract: With unusually slow and high-resolution sweeps of magnetic field, strong, ultra-narrow (width down to $100 {\rm \mu T}$) resistance peaks are observed in the regime of breakdown of the quantum Hall effect. The peaks are dependent on the directions and even the history of magnetic field sweeps, indicating the involvement of a very slow physical process. Such a process and the sharp peaks are, however, not predicted by existing theories. We also find a clear connection between the resistance peaks and nuclear spin polarization.
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