Vickers hardness distribution and prediction model of cement pastes corroded by sulfate under the coexistence of electric field and chloride

2021 ◽  
Vol 309 ◽  
pp. 125119
Author(s):  
Hongqiang Chu ◽  
Tao Wang ◽  
Lin Han ◽  
Li Cao ◽  
Ming-Zhi Guo ◽  
...  
Keyword(s):  
Electric Field ◽  
Prediction Model ◽  
Vickers Hardness ◽  
Hardness Distribution ◽  
Cement Pastes

Effect of Electric Field on Conductivity and Vickers Hardness of an Al-Li Alloy

2003 ◽  
Vol 20 (11) ◽  
pp. 2067-2069
Author(s):  
Liu Bing ◽  
Chen Da-Rong ◽  
Chen Zheng ◽  
Wang Yong-Xin ◽  
Li Xiao-Ling
Keyword(s):  
Electric Field ◽  
Vickers Hardness

301 Vickers Hardness Distribution for Friction Stir Welding 7075 Aluminum Alloy

2010 ◽  
Vol 2010.48 (0) ◽  
pp. 65-66
Author(s):  
Tsutomu ITO ◽  
Xiaoyong YUN ◽  
Alexandre GOLOBOLODKO ◽  
Yoshinobu MOTOHASHI ◽  
Goroh ITOH ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Vickers Hardness ◽  
Hardness Distribution ◽  
7075 Aluminum Alloy ◽  
Friction Stir

scholarly journals Application of WOA–SVR in Seed Vigor of High-Voltage Electric Field Treatment on Aged Cotton (Gossypium spp.) Seeds

Agronomy ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 88
Author(s):  
Zhanhua Song ◽  
Junxiang Ma ◽  
Qian Peng ◽  
Baoji Liu ◽  
Fade Li ◽  
...  
Keyword(s):  
Electric Field ◽  
Prediction Model ◽  
High Voltage ◽  
Treatment Time ◽  
Seed Vigor ◽  
Germination Index ◽  
Support Vector ◽  
Gossypium Spp ◽  
Whale Optimization ◽  
Input Variables

When seeds are treated with a high-voltage electric field (HVEF) to improve seed vigor, due to the large differences in the biological electromagnetic effects on different types of seeds, the methods of variance analysis and regression analysis based on data statistics are generally used to construct the optimal electric field dose prediction model; however, the generalization performance of the prediction model tends to be poor. To solve this problem, the electric intensity, frequency and treatment time were taken as the input variables for hybrid support vector regression (SVR) analysis to establish the prediction model of the seed comprehensive germination index. The whale optimization algorithm (WOA) was used to optimize the kernel parameters of the SVR. The optimized hybrid WOA–SVR model predicted the optimal comprehensive germination index of aged cotton (Gossypium spp.) seeds to be 329, the optimal HVEF dosage was 3.64 kV/cm × 99 s, and the frequency was 1.4 Hz. The aged cotton seeds were treated with the optimal HVEF and the germination test was carried out. Compared with the check (CK), the comprehensive germination index of seeds increased by 48%. The research results provided a new method and new idea for the optimal design of parameters for seed treatment with HVEF.

scholarly journals Predicting storm-time thermospheric mass density variations at CHAMP and GRACE altitudes

2011 ◽  
Vol 29 (3) ◽  
pp. 443-453 ◽  
Author(s):  
R. Liu ◽  
S.-Y. Ma ◽  
H. Lühr
Keyword(s):  
Solar Wind ◽  
Electric Field ◽  
Prediction Model ◽  
Geomagnetic Storms ◽  
Mass Density ◽  
Density Measurements ◽  
Time Prediction ◽  
Different Altitudes

Abstract. Orbit-averaged mass density measurements derived from the satellites CHAMP and GRACE are used to investigate the storm-time prediction model developed by Liu et al. (2010) at different altitudes. This model uses as input only the solar wind merging electric field. From 2002 to 2005 in total 31 major geomagnetic storms with minimum Dst

scholarly journals A STUDY ON VICKERS HARDNESS DISTRIBUTION OF MORTAR WITH SILICATE TYPE SURFACE PEMETRANTS

2020 ◽  
Vol 73 (1) ◽  
pp. 333-339
Author(s):  
Takuya KONDO ◽  
Shin-ichi MIYAZATO ◽  
Hideki NISHINO ◽  
Katsunori YOKOI
Keyword(s):  
Vickers Hardness ◽  
Hardness Distribution
Sign in / Sign up

Export Citation Format

Share Document