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KB:
SUMO
Language:
ChineseLanguage
ChinesePinyinWriting
ChineseSimplifiedWriting
ChineseTraditionalLanguage
EnglishGroupLanguage
EnglishLanguage
FrenchLanguage
GermanLanguage
JapaneseLanguage
SpanishLanguage
SwedishLanguage
expectedYearOfGraduation
measuringListInterval
Formal Language:
OWL
SUO-KIF
TPTP
traditionalLogic
KB Term:
Term intersection
English Word:
Any
Noun
Verb
Adjective
Adverb
MTBFInstanceFn
Sigma KEE - MTBFInstanceFn
MTBFInstanceFn
appearance as argument number 1
(
instance
MTBFInstanceFn
UnaryFunction
)
Mid-level-ontology.kif 34350-34350
Mean time between failures
is an
instance
of
unary function
(
documentation
MTBFInstanceFn
EnglishLanguage
"
MTBFInstanceFn
denotes the mean time between Failure of a single device, ie an (Instance of ?D Deive) while
MTBFFn
denotes the MTBF of a
Class
of devices. Note that the argument for MTBFInstanceFn is an
instance
.")
Mid-level-ontology.kif 34351-34353
Mean time between failures
is an
instance
of
unary function
(
domain
MTBFInstanceFn
1
Device
)
Mid-level-ontology.kif 34356-34356
The number 1 argument of
mean time between failures
is an
instance
of
device
(
range
MTBFInstanceFn
TimeDuration
)
Mid-level-ontology.kif 34357-34357
The
range
of
mean time between failures
is an instance of
time duration
appearance as argument number 2
(
relatedInternalConcept
MTBFFn
MTBFInstanceFn
)
Mid-level-ontology.kif 34335-34335
Mean time between failures
is
internally
related to
mean time between failures
(
format
EnglishLanguage
MTBFInstanceFn
"The MTBF of %1 is
HourDuration
")
Mid-level-ontology.kif 34354-34354
Mean time between failures
is
internally
related to
mean time between failures
(
termFormat
EnglishLanguage
MTBFInstanceFn
"mean time between failures")
Mid-level-ontology.kif 34355-34355
Mean time between failures
is
internally
related to
mean time between failures
(
relatedInternalConcept
TimeToFailureFn
MTBFInstanceFn
)
Mid-level-ontology.kif 34584-34584
Time to failure
is
internally
related to
mean time between failures
antecedent
(=>
(
and
(
equal
(
MeasureFn
?H
HourDuration
)
(
MTBFFn
?CLASS))
(
instance
?D ?CLASS)
(
equal
(
MeasureFn
?X
HourDuration
)
(
MTBFInstanceFn
?D))
(
inList
?X ?L))
(
equal
?H
(
AverageFn
?L)))
Mid-level-ontology.kif 34337-34348
If
equal
X
hour duration
(s) and The MTBF of
Y
,
Z
is an
instance
of
Y
,
equal
W
hour duration
(s) and The MTBF of
Z
is
HourDuration
, and
W
is a
member
of
V
, then
equal
X
and the
average
of the numbers in
V
(=>
(
equal
(
MeasureFn
?H
HourDuration
)
(
MTBFInstanceFn
?D))
(
equal
?H
(
DivisionFn
(
AdditionFn
(
ListSumFn
(
PhysicalQuantityToNumberFn
(
DeviceUpTimeDurationListFn
?D)))
(
ListSumFn
(
PhysicalQuantityToNumberFn
(
DevicePlannedDownTimeDurationListFn
?D))))
(
ListLengthFn
(
DeviceFailTimeDurationListFn
?D)))))
Mid-level-ontology.kif 34359-34373
If
equal
X
hour duration
(s) and The MTBF of
Y
is
HourDuration
, then
equal
X
and (the
sum
of
PhysicalQuantityToNumberFn
returns the numberic values of a list of The
List
of
deviceUpTime
duration
for
Y
is and the
sum
of
PhysicalQuantityToNumberFn
returns the numberic values of a list of The
List
of
deviceUpTime
duration
for
Y
is) and
length
of The
List
of
deviceFailTime
duration
for
Y
is
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Sigma version 3.0.0-
0a80e6c8
(2026-05-12) is
open source software
produced by
Articulate Software
and its partners