Showing 61 - 80 results of 15,721 for search '(( significantly ((linear decrease) OR (mean decrease)) ) OR ( significant bit increase ))', query time: 0.81s Refine Results
  1. 61
  2. 62
  3. 63
  4. 64

    Drill rod and drill bit parameters. by Sheng Xue (1881781)

    Published 2025
    “…Key findings reveal: (1) Axial migration velocity increases significantly with rotational speed, with 0.5–1 mm fine particles accelerating by 39% to 3.9 m s<sup>-1</sup> at 100 rpm compared to static condition, though an optimal threshold exists at 150 rpm; (2) Rod rotation induces vortical flow fields, where bit geometry impedes coarse particles (>1 mm) in blade zones, while 0.5–1 mm particles migrate at velocities higher than 2–3 mm fractions under different rotational speeds; (3) Mass flow rate at the orifice doubles with speed (reaching 0.06 kg s<sup>-1</sup> at 200 rpm), while static condition reduces efficiency by 50%. …”
  5. 65
  6. 66
  7. 67
  8. 68
  9. 69
  10. 70
  11. 71
  12. 72
  13. 73
  14. 74

    Image_1_Loneliness predicts decreased physical activity in widowed but not married or unmarried individuals.TIF by Chava Pollak (18478155)

    Published 2024
    “…Loneliness did not predict a statistically significant decrease in physical activity in married or unmarried individuals.…”
  15. 75
  16. 76
  17. 77
  18. 78
  19. 79
  20. 80