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Your search keyword '"Zhou, Rong"' showing total 30 results
Start Over Author "Zhou, Rong" Journal applied mechanics and materials
30 results on '"Zhou, Rong"'

1. An Effective Implementation of the Nonlinear Homotopy Method for MOS Transistor Circuits

Author

Xing Peng Zhou, Dan Niu, Guo Rui He, Xiaojun Wang, and Zhou Rong Huang

Subjects
Nonlinear system, Spice, Hardware_INTEGRATEDCIRCUITS, Electronic engineering, Effective method, General Medicine, Homotopy method, Transistor circuits, Hardware_LOGICDESIGN, Mathematics
Abstract

Recently, an efficient homotopy method termed the nonlinear homotopy method (NLH) has been proposed for finding DC operating points of MOS transistor circuits. This method is not only efficient but also globally convergent. However, the programming of sophisticated homotopy methods is often difficult for non-experts or beginners. In this paper, an effective method for implementing the MOS NLH method on SPICE is proposed. By this method, we can implement the MOS NLH method from a good initial solution with various efficient techniques and without programming.

Published
2014
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2. Numerical Calculation of Spray and Combustion with Heating Fuel in a Medium Speed Diesel Engine

Author

Cheng Cheng Zhang, Zhou Rong Zhang, Xiao Yi Lai, Jian Zhi Li, and Qian Wang

Subjects
Diesel fuel, Brake specific fuel consumption, Fuel mass fraction, Materials science, Internal combustion engine, Winter diesel fuel, Nuclear engineering, Vapor lock, General Medicine, Diesel cycle, Diesel engine, Automotive engineering
Abstract

The fuel usually has high viscosity and low quality for marine diesel engines. Especially for its shallow combustion chamber structures, the preparation of in-cylinder mixture gas is mainly rely on spray and atomization, which is vulnerable influenced by fuel viscosity and surface tension seriously. Based on the case, this paper introduced a CFD method to heat the diesel fuel to reduce fuel viscosity and surface tension, expecting to explore the in-cylinder combustion process and emissions generation, so that the atomization effect of fuel spray and combustion in diesel could be improved. The calculation model was set up according to the L23/30H diesel engine. Temperature field and pressure field in cylinder were calculated and the emission of NO were studied under conditions of different fuel temperatures. The results show that the increasing of fuel temperature is helpful to realize low-temperature combustion and reduce NO emission to some extent.

Published
2013
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30. Decomposition of Two Phase WC and W2C in Casting Tungsten Carbide Particles in Steel/Iron Substrate Composites

Author

Shan, Quan, Li, Zu Lai, Jiang, Ye Hua, Zhou, Rong, and Sui, Yu Dong

Abstract

The interface between matrix and casting tungsten carbide particle is produced by the the particles’ decomposition. Casting tungsten carbide particle is a kind of eutectic product，which is composed of two phases: WC and W2C. The two phases have differing chemical and physical properties, and thus follow different paths to achieve their decomposition process. By observing the decomposition of the particle, a hypothesis was put forward about how the casting tungsten carbide particle decomposes in steel/iron composites. An experiment was then designed to prove this hypothesis. The experimental result shows that heat gain plays a significant role in the decomposition process of casting tungsten carbide particles.

Published
2011
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