Perhaps you should try some spelling variations:

• classification algorithm »
  • classification algorithms (Expand Search)
  • classification categories3 (Expand Search)
  • identification algorithms (Expand Search)
• estimation algorithms »
  • optimization algorithms (Expand Search)
  • optimization algorithm (Expand Search)
  • evolution algorithms (Expand Search)
• image classification »
  • 2 classification (Expand Search)
  • 2.3 classification (Expand Search)
  • 1 classification (Expand Search)
• automated estimation »
  • automated sonication (Expand Search)
  • automated distribution (Expand Search)
  • automated information (Expand Search)