Table 1 Two topics (topic–word distributions) selected from 200 topics learned by LDA using sentences in our database
From: Semi-supervised machine-learning classification of materials synthesis procedures
Sample sentences | Words of highest probability | Topics |
|---|---|---|
“As-received ZrB2 powder was mixed with 2 wt% B4C powder (4.5 vol%) and 1 wt% carbon (2.5 vol%) in acetone by ball milling for 24 h using WC media.”44 | P(ball) = 0.065 P(milling) = 0.051 P(h) = 0.042 P(milled) = 0.032 P(powder) = 0.031 P(mill) = 0.027 … | T1 (ball-)milling |
“The Al powder was first ball milled in an atmosphere of supra-pure hydrogen for removing the small amount of oxide film on the surface.”45 | ||
“The solid product obtained was filtered, dried at 110 °C and finally calcined in air at 550 °C for 6 h at a heating rate of 1 °C/min.”46 | P(°C) = 0.139 P(h) = 0.104 P(air) = 0.038 P(calcined) = 0.035 P(dried) = 0.028 P(K) = 0.016 … | T2 sintering |
“Finally, the solid was calcined in air from RT to 500 °C at a heating rate of 2 °C min−1 and maintained for 4 h, which led to the formation of the MgO-Al2O3 support.”47 |
