36 Result(s)

Article

Cavitation erosion characteristics of a NiTi alloy

W. Liu, Y. G. Zheng, Z. M. Yao, C. S. Liu in Metallurgical and Materials Transactions A (2004)

Article

Study on high-temperature naphthenic acid corrosion and erosion-corrosion of aluminized carbon steel

High-temperature naphthenic acid corrosion (NAC) and erosion-corrosion (NAEC) behaviors of pack-aluminized carbon steel have been investigated in laboratory to evaluate the resistance of aluminized layer to th...

X. Q. Wu, H. M. **g, Y. G. Zheng, Z. M. Yao, W. Ke in Journal of Materials Science (2004)

Article

Stability study on the nitrile hydratase of Nocardia sp. 108: From resting cells to crude enzyme preparation

In recent years nitrile hydratases (NHases) have drawn increasing attention due to their critical roles in organic synthesis. In the present paper an extensive investigation on the stability and activity of NH...

Y. J. Wang, Y. G. Zheng, R. C. Zheng, Y. C. Shen in Applied Biochemistry and Microbiology (2006)

Article

The broad band spectral index of blazars in a low state

Using the broad band spectral index of 164 blazars in a low state, we studied the possible correlation between different broad band spectral index (α _{r.ir ...}

Y. G. Zheng, X. Zhang, S. M. Hu in Astrophysics and Space Science (2007)

Article

Stability and Hopf bifurcations of an optoelectronic time-delay feedback system

The local dynamics around the trivial solution of an optoelectronic time-delay feedback system is investigated in the paper, and the effect of the feedback strength on the stability is addressed. The linear st...

Y. G. Zheng, Z. H. Wang in Nonlinear Dynamics (2009)

Article

Inhibition of CO₂ corrosion of N80 carbon steel by carboxylic quaternary imidazoline and halide ions additives

The inhibition of the corrosion of N80 mild steel by 2-undecyl-1-1-ethylamino-1-ethylcarboxyl quaternary imidazoline (CQI) in CO₂-saturated 3% NaCl and 3% Na₂SO₄ solutions was studied using electrochemical method...

P. C. Okafor, C. B. Liu, X. Liu, Y. G. Zheng in Journal of Applied Electrochemistry (2009)

Article

Corrosion inhibition and adsorption behavior of imidazoline salt on N80 carbon steel in CO₂-saturated solutions and its synergism with thiourea

The inhibition and adsorption behavior of 2-undecyl-1-sodium ethanoate-imidazoline salt (2M2) and thiourea (TU) on N80 mild steel in CO₂-saturated 3 wt.% NaCl solutions was studied at 25 °C, pH 4, and 1 bar CO₂ p...

P. C. Okafor, C. B. Liu, X. Liu, Y. G. Zheng… in Journal of Solid State Electrochemistry (2010)

Article

Variability and spectral variation of 3C 66A

3C 66A was monitored by the BATC (Bei**g-Arizona-Taipei-Connecticut) telescope from 2005 to 2008, 1994 observations were obtained on 89 nights. Detailed research and analysis was performed on these observatio...

Shao Ming Hu, Jianghua Wu, H. Y. Guo, X. Zhou, X. Zhang… in Astrophysics and Space Science (2011)

Article

Multi-Wavelength Variability in PKS 2155-304

We study multi-wavelength variability in BL Lacertae object PKS 2155-304 in the frame of the time dependent one-zone synchrotron self-Compton (SSC) model, where stochastic particle acceleration is taken into a...

Y. G. Zheng, L. Zhang, X. Zhang, H. J. Ma in Journal of Astrophysics and Astronomy (2011)

Article

Relaxation oscillation and attractive basins of a two-neuron Hopfield network with slow and fast variables

In this paper, the nonlinear dynamics of a two-neuron Hopfield network with slow and fast variables is investigated. By means of the geometric singular perturbation theory, the condition that ensures the exist...

Y. G. Zheng, Z. H. Wang in Nonlinear Dynamics (2012)

Article

Broad line and multi-wave luminosity relations in Fermi FSRQs

We study broad line and multi-wave luminosity relations for 80 flat-spectrum radio quasars (FSRQs) detected by Fermi LAT. Our results are as follows: for FSRQs, the correlations between logL _...

D. R. **ong, H. J. Zhang, X. Zhang, Y. G. Zheng, T. F. Yi… in Astrophysics and Space Science (2013)

Article

Erosion-Corrosion Behavior of Electroless Ni-P Coating on Copper-Nickel Alloy in 3.5 wt.% Sodium Chloride Solution

The present investigation concerns electroless Ni-P coatings prepared onto the copper-nickel alloy (CuNi 90/10) to enhance the erosion-corrosion resistance. X-ray diffraction technique (XRD), scanning electron...

B. Jiang, S. L. Jiang, A. L. Ma, Y. G. Zheng in Journal of Materials Engineering and Perfo… (2014)

Article

Corrosion Failure Analysis of a Condenser on the Top of Benzene Tower in Styrene Unit

Corrosion and scaling of heat exchanger is a severe problem in oil refinery industries. In this paper, the corrosion mechanisms of tubes in the condenser at the top of the benzene tower have been investigated ...

Y. G. Zheng, G. Q. Liu, Y. M. Zhang, H. X. Hu… in Journal of Failure Analysis and Prevention (2014)

Article

Delta-function Approximation SSC Model in 3C 273

We obtain an approximate analytical solution using δ approximate calculation on the traditional one-zone synchrotron self-Compton (SSC) model. In this model, we describe the electron energy distribution by a brok...

S. J. Kang, Y. G. Zheng, Q. Wu in Journal of Astrophysics and Astronomy (2014)

Article

γ-Ray Emission from the Extreme Blazar 1ES 0229 + 200

Based on the traditional Synchrotron Self-Compton (SSC) model, we consider a secondary γ-ray emission component to an extreme blazar 1ES 0229 + 200 for the multiwavelength radiation. By assuming a suitable electr...

J. Li, T. Kang, Y. G. Zheng in Journal of Astrophysics and Astronomy (2014)

Article

Fractal Property in the Light Curve of BL Lac Object S5 0716 + 714

In this paper, we compile the historical R-band data of S5 0716 + 714 from literature and obtain its fractal dimension by using a fractal method and then simulate the data with the Weierstrass–Mandelbrot (W–M)...

J. W. Ou, Y. G. Zheng in Journal of Astrophysics and Astronomy (2014)

Article

Electrochemical behavior of phenylalanine and its cobalt complex as corrosion inhibitors for mild steel in H₂SO₄

Corrosion inhibition of phenylalanine (phe) and its its cobalt complex(Co-phe) were evaluated using electrochemical polarization and electrochemical impedance spectroscopy (EIS) for mild steel in 0.1 M H₂SO₄ solu...

X. Liu, Y. Lu, Y. S. Yang, H. X. Hu, Y. G. Zheng in Russian Journal of Applied Chemistry (2015)

Article

Reversible stretching of pre-strained water-filled carbon nanotubes under electric fields

As a two-phase structure, the water-filled carbon nanotubes (CNTs) have been successfully observed and separated in laboratory, which provide an ideal choice for functional building blocks at nanoscale. In thi...

H. F. Ye, H. W. Zhang, Z. Chen, Y. G. Zheng, Z. Zong… in Microfluidics and Nanofluidics (2015)