Search

Your search keyword '"Lin, Wen bin"' showing total 89 results
Start Over Author "Lin, Wen bin"
89 results on '"Lin, Wen bin"'

51. The Evolution for Various Matter Perturbations in the Expanding Universe

Author

Sheng Ke, Chu YaoQuan, and Lin Wen-bin

Subjects
Physics, Photon, Cold dark matter, Physics and Astronomy (miscellaneous), media_common.quotation_subject, High Energy Physics::Phenomenology, Scalar (mathematics), Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Universe, Metric expansion of space, Massless particle, Baryon, General Relativity and Quantum Cosmology, Neutrino, media_common
Abstract

We present a systematic treatment of the linear theory of scalar gravitational perturbations of various matter (including baryons, cold dark matter, photons, massless neutrinos,and massive neutrino) for the flat, open and close universes, concentrating on the treatment of the massive neutrino component which has been either ignored or approximated crudely for the nonflat universe in previous literatures.

Published
2000
Full Text
View/download PDF

65. Stability analysis for the high-order leapfrog sigma-delta A/D converters

Author

Wen-Bin Lin Wen-Bin Lin and Bin-Da Liu Bin-Da Liu

Subjects
Physics, Signal-to-noise ratio, Control theory, Dynamic range, Topology (electrical circuits), Converters, Delta-sigma modulation, Transfer function, Stability (probability), Noise (electronics)
Abstract

In this paper, a novel methodology for designing and analyzing high performance sigma-delta leapfrog modulators for ultra-high resolution analog-to-digital (A/D) converters is presented. The less sensitive topology the leapfrog topology, in component variations is analyzed by considering the noise transfer function (NTF). By using theoretical analysis, the loop coefficients are constrained to a small, clear and definite range called the stable region. With the output voltage limited within p 2V, an absolutely stable region (ASR) is obtained. A program that analyzes and generates the required coefficients is constructed for easily designing this topology. For a 256 over-sampling ratio (OSR) and the coefficients from ASR, the signal to noise ratio (SNR) and dynamic range (DR) are 105 dB and 100 dB, respectively. In accordance with the behavior simulation results, the system is not only stable and efficient but also suitable for high-resolution applications.

Published
2003
Full Text
View/download PDF

66. Erythropoiesis Suppression Is Associated with Anthrax Lethal Toxin-Mediated Pathogenic Progression

Author

Chang, Hsin-Hou, primary, Wang, Tsung-Pao, additional, Chen, Po-Kong, additional, Lin, Yo-Yin, additional, Liao, Chih-Hsien, additional, Lin, Ting-Kai, additional, Chiang, Ya-Wen, additional, Lin, Wen-Bin, additional, Chiang, Chih-Yu, additional, Kau, Jyh-Hwa, additional, Huang, Hsin-Hsien, additional, Hsu, Hui-Ling, additional, Liao, Chi-Yuan, additional, and Sun, Der-Shan, additional

Published
2013
Full Text
View/download PDF

70. High power microwave breakdown in gas using the fluid model with non-equilibrium electron energy distribution function

Author

Yang Dang, Liao Cheng, Lin Wen-Bin, Zhao Peng-Cheng, and Zhong Xuan-Ming

Subjects
Physics, Argon, General Physics and Astronomy, chemistry.chemical_element, Mechanics, Collision, Boltzmann equation, Power (physics), Distribution (mathematics), chemistry, Physics::Plasma Physics, Electron energy distribution function, Microwave, Energy (signal processing)
Abstract

The electron energy distribution function (EEDF) is usually assumed to be of the Maxwellian distribution in the fluid model in the simulation of high power microwave breakdown in gas. However, this assumption may lead to some large errors in the simulations. In this paper we compute the non-equilibrium EEDF via solving the Boltzmann equation directly, and incorporate it into the fluid model for argon breakdown. Numerical simulations show that the breakdown time obtained by the fluid model with the non-equilibrium EEDF accords well with the Particle-in-cell-Monte Carlo collision simulation result, while the Maxwellian EEDF has higher energy tail and results in faster breakdown time at low mean electron energy. Based on the non-equilibrium EEDF, the dependence of the breakdown threshold on the pressure predicted by the fluid model accord well with the argon breakdown experimental result.

Published
2013
Full Text
View/download PDF

80. Energy conservation for lighting system in county government building.

Author

Lin, Chia-Ching, Lin, Wen-Bin, Chen, Chien-An, and Lin, Wei-Po

Abstract

This research instanced the county government for example, to gather and analyze some cases of the structure of electric consumption and electric facilities of the official buildings. Try to understand every density of unit lighting power density by close investigation; and use the result to stand on the saving spaces energies management, and come up with some suggestion with ideas of saving energies from building. [ABSTRACT FROM PUBLISHER]

Published
2013
Full Text
View/download PDF

87. Design of a printed compact antenna with enhanced impedance bandwidth.

Author

Chang, Lei, Liao, Cheng, Chen, Ling‐lu, Lin, Wen‐bin, and Zheng, Xuan

Subjects
ANTENNAS (Electronics), ELECTRIC impedance, BANDWIDTHS, MICROWAVES, DATA transmission systems
Abstract

A novel compact ultrawideband planar antenna fed by a microstrip line is proposed. The proposed antenna consists of a rectangular patch and a defected ground plane with a semicircular notch and two stubs. The modified ground plane is used to achieve the wide impedance bandwidth. The measured results show that the antenna has a bandwidth 2.1-2.6 GHz and 3.3-20 GHz for S11 < −10 dB. The proposed antenna exhibits the omnidirectional radiation patterns and appreciable gain across the operating band. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:86-89, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27263 [ABSTRACT FROM AUTHOR]

Published
2013
Full Text
View/download PDF

88. Exact Harmonic Metric for a Uniformly Moving Schwarzschild Black Hole

Author

Lin Wen-bin and He Guan-Sheng

Subjects
Physics, Physics::General Physics, Physics and Astronomy (miscellaneous), Astrophysics::High Energy Astrophysical Phenomena, Schwarzschild geodesics, Kerr metric, Charged black hole, Photon sphere, Black hole, General Relativity and Quantum Cosmology, Classical mechanics, Reissner–Nordström metric, Schwarzschild metric, Schwarzschild radius
Abstract

The harmonic metric for Schwarzschild black hole with a uniform velocity is presented. In the limit of weak field and low velocity, this metric reduces to the post-Newtonian approximation for one moving point mass. As an application, we derive the dynamics of particle and photon in the weak-field limit for the moving Schwarzschild black hole with an arbitrary velocity. It is found that the relativistic motion of gravitational source can induce an additional centripetal force on the test particle, which may be comparable to or even larger than the conventional Newtonian gravitational force.

Catalog

Books, media, physical & digital resources
See catalog results