But such productivity has come at a price, much of it paid for in four kinds of environmental damage:Soil degradation.
By analyzing the crack density, we can conclude: GHDC2 has the best stress corrosion resistance in four kinds of concrete; chloride can accelerate the chemical corrosion of magnesium and sulfate brine to concrete; tensile stress and compressive stress can obviously improve the appearance and propagation of micro-cracks.
The vibration acceleration signals of the normal gear, gear with tooth root crack fault, gear with pitch crack fault, gear with tooth wear fault and gear with multi-fault (tooth root crack & tooth wear fault) is collected in four kinds of speed conditions such as 300 rpm, 900 rpm, 1200 rpm and 1500 rpm.
The magnetic actuator is placed in four kinds of magnetic field directions to investigate the diversity of deflections; the angles between the easy axis of the ferromagnetic multilayer thin films and the direction of the external magnetic field are 90°, 70°, 45° and 20°.
The dictionary of keywords is included in four kinds of sentiment whichused to get the training data.
This table presents the best function values in four kinds of statistics, which are best, median (med), worst, and standard deviation (std).
This table presents the best function values in four kinds of statistics, which are minimum (min), median (med), maximum (max), and standard deviation (std).
From these results, resistance force increased with velocity increasing in four kinds of devices except Type A. Therefore, the wiping device needed to select from among four types of Type B to Type D800.
BER versus SNR in four kinds of modulation methods with equalizer (a) and without equalizer (b) with the range in SNR from 2 to 18 is shown in Fig. 6.
Compared to single-polarization synthetic aperture radar (SAR), fully polarimetric SAR (PolSAR) is capable of recording the backward scattering information in four kinds of polarization mode, which contain much more information and are more helpful for understanding the characteristics of ground objects (Lee and Pottier 2009; Zhai et al. 2016a).
They are displayed in tags-per-million (TPM) and fold values, as well as visually displayed in four kinds of scales in a color gradient pattern.
