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Outline
By measuring the sound velocity of single crystal MgO at high pressures and using the high pressure Brillouin scattering data, the pressures point by point (the oil-pressure points range from 15 MPa to 51 MPa with step of 2 MPa) in a wide pressure range in the cubic pressure cell under hydrostatic loading environment were calibrated. Furthermore, a novel pressure calibration technique for the large volume pressure cell was established. This new calibration method is more reliable than the traditional one which only depends on 2 or 3 phase transition points. As an example, the measured sound velocity in LY12 aluminum under this hydrostatic loading is in good agreement with published literature data, which further confirms that the novel pressure calibration method is feasible and reliable. Comparing the pressure in the high-pressure cell based on the solid-liquid hybrid assembly with that based on the all-solid one, it was found that the cell-pressure in the former is systematically lower. The analysis suggested that this phenomenon is due to the shear effect in all-solid assembly which makes the pressure scale much higher.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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