正值

zhèngzhí
  1. just at the time of
  2. honest
  3. upright
  4. (math.) positive value

CEDICT

math

Entry Composition

1 正 zhèng
  1. straight
  2. upright
  3. proper
  4. main
  5. principal
  6. to correct
  7. to rectify
  8. exactly
  9. just (at that time)
  10. right (in that place)
  11. (math.) positive
2 值 zhí
  1. value
  2. (to be) worth
  3. to happen to
  4. to be on duty