Four noise parameter determination method for transistors based on the frequency dependence of the noise figure

1998 ◽  
Vol 34 (16) ◽  
pp. 1612 ◽  
Author(s):  
V. Danelon ◽  
P. Crozat ◽  
F. Aniel ◽  
G. Vernet
Keyword(s):  
Frequency Dependence ◽  
Noise Figure ◽  
Parameter Determination ◽  
Determination Method ◽  
Noise Parameter

A new method for phemt noise-parameter determination based on 50-Ω noise measurement system

2003 ◽  
Vol 51 (10) ◽  
pp. 2079-2089 ◽  
Author(s):  
Jianjun Gao ◽  
Choi Look Law ◽  
Hong Wang ◽  
S. Aditya ◽  
G. Boeck
Keyword(s):  
Measurement System ◽  
Noise Measurement ◽  
New Method ◽  
Parameter Determination ◽  
Noise Parameter

Novel Noise Parameter Determination for On-Wafer Microwave Noise Measurements

2008 ◽  
Vol 57 (11) ◽  
pp. 2462-2471 ◽  
Author(s):  
Chih-Hung Chen ◽  
Ying-Lien Wang ◽  
M.H. Bakr ◽  
Zheng Zeng
Keyword(s):  
Parameter Determination ◽  
Noise Parameter ◽  
Noise Measurements ◽  
Microwave Noise

A new programmable load for noise parameter determination

1991 ◽  
Vol 39 (2) ◽  
pp. 216-223 ◽  
Author(s):  
B.M. Albinsson ◽  
H. Guo ◽  
M. Schoon ◽  
H.-O. Vickes
Keyword(s):  
Parameter Determination ◽  
Noise Parameter

scholarly journals Johnson–Holmquist-II(JH-2) Constitutive Model for Rock Materials: Parameter Determination and Application in Tunnel Smooth Blasting

2018 ◽  
Vol 8 (9) ◽  
pp. 1675 ◽  
Author(s):  
Jianxiu Wang ◽  
Yao Yin ◽  
Chuanwen Luo
Keyword(s):  
Constitutive Model ◽  
High Pressures ◽  
Numerical Study ◽  
Parameter Determination ◽  
Economic Losses ◽  
Large Strains ◽  
Determination Method ◽  
Rock Materials ◽  
Rock Tunnels ◽  
Smooth Blasting

The Johnson–Holmquist-II(JH-2) model is introduced as the constitutive model for rock materials in tunnel smooth blasting. However, complicated and/or high-cost experiments need to be carried out to obtain the parameters of the JH-2 constitutive model. This study chooses Barre granite as an example to propose a quick and convenient determination method for the parameters of the JH-2 model using a series of computational and extrapolated methods. The validity of the parameters is verified via comparing the results of 3D numerical simulations with laboratory blast-loading experiments. Subsequently, the verified parameter determination method, together with the JH-2 damage constitutive model, is applied in the numerical simulation of smooth blasting in Zigaojian tunnel, Hangzhou–Huangshan high-speed railway. The overbreak/underbreak induced by rock blasting and joints/discontinuities is well estimated through comparing the damage contours resulting from the numerical study with the tunnel profiles measured from the tunnel site. The peak particle velocities (PPVs) of the near field are extracted to estimate the damage scope and damage degree for the surrounding rock mass of the tunnel on the basis of PPV damage criteria. This method can be used in the excavation of rock tunnels subjected to large strains, high strain rates, and high pressures, thereby reducing safety risk and economic losses.

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