Full
Outline
To characterize the grain morphology from multiple apsects such as size， shape and distribution， and then realize the quantitative ultrasonic evaluation of the uniformity of grain morphology， an ultrasonic multi-parameter evaluation method for grain morphology is proposed. GH738 grain morphology is used as the characterization object， and 10 quantitative parameters are extracted with the grain as the measurement unit. Eight quantitative parameters are measured for the field-of-view image. The correlation screening rule using pearson coefficient is established， then seven metallographic quantitative parameters are selected， the radial layout visualization star coordinate method is used to calculate two parameters， r and ， which are used to comprehensively characterize grain morphology. Six ultrasonic parameters， such as sound velocity and attenuation coefficient， are extracted， and a sample library of two-dimensional comprehensive characterization parameters of grain morphology and ultrasonic multi-characteristic parameters is established. Three ultrasonic evaluation model based on MLR， RFR or PSO-SVM algorithm are built to characterize the two comprehensive parameters of grain. The verification experimental results show that the multi-dimensional comprehensive characterization of grain morphology is feasible.The ultrasonic evaluation model based on MLR has a higher accuracy and more balanced evaluation for two parameters.
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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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