土壤有机质平均停留时间 mean residence time of soil organic matter

土壤有机质平均停留时间 mean residence time of soil organic matter


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D) 【解析】系统的可靠性通常用平均无故障时间( MTBF)和平均故障修复时间( MTTR)来表示,MTTR是Mean Time To Repair的缩写,指修复一次故障所需要的时间。

系统可靠性的简单度量是平均故障间隔时间(MTBF),其计算公式是(9)。(MTTF: Mean Time To Failure; MTTR: Mean Time To Repair)A.MTTF+MTTRB.MTTF-MTTRC.MTTR-MTTFD.MTTF×MTTR

bike on time yesterday. I mean to give it 77

系统可靠性的简单度量是平均故障间隔时间(MTBF),其计算公式是(23);软件可用性是指在某个给定时间点上程序能够按照需求执行的概率,其定义为(24)。(MTTF: Mean Time To Failure:MTTR:Mean Time To Repair)A.MTTF+MTTRB.MTTF-MTTRC.MTTR-MTTFD.MTTF×MTTR

X线平均波长(λmean)与最短波长(λmean)的关系是A.λmean=3λminB.λmean=5λminC.λmean=2λminD.λmean=5λminE.λmean=λmin

x线平均波长(λmean)与最短波长(λmin)的 关系是A.λmean =3λminB.λmean =2.5λmin x线平均波长(λmean)与最短波长(λmin)的 关系是A.λmean =3λminB.λmean =2.5λminC.λmean =2λminD.λmean =l.5λminE.λmean=λmin

软件可用性是指在某个给定时间点上程序能够按照需求执行的概率,其定义为(4)。(MTTF: Mean Time To Failure; MTTR: Mean Time To Repair)A.B.C.D.

通常使用平均修复时间MTTR(Mean Time to Repair)和平均故障间隔时间MTBF(Mean Time Between Failure)这两个指标来评价产品或系统的可靠性。 A.错误B.正确

A mean sun is used as the reference for solar time for three reasons. Which reason is NOT a cause for use of a mean sun?A.The motion of the apparent sun is along the eclipticB.Measurement of time is along the celestial equatorC.The speed of the Earth's revolution is not constantD.There are variations in the Earth's rotational speed

The maximum difference between mean time and apparent time is ______.A.equal to the longitude expressed in time unitsB.about 16 minutesC.the difference between the GHA of mean sun and the first point of AriesD.15°of arc

A signal indicating Greenwich mean time would be preceded with ______.A.a code hoist to indicate Greenwich mean time to followB.the letter GC.the letters GTD.the letter Z

MSTP设备运行的平均无故障时间(MTBF-Mean Time Between Failure)应不小于()。A、50000小时B、60000小时C、80000小时D、100000小时

MTTR(Mean Time To Repair):()。

货车停留时间指标包括()停留时间、()停留时间、中转车平均停留时间、货物作业车平均一次货物作业在站平均停留时间。

统可靠性是指该系统在服务时间内可靠工作的程度,常用平均修复时间(Mean Time To Repair,MTYR)来衡量。

MTBF(Mean Time Between Failure):()。

名词解释题土壤有机质平均停留时间 mean residence time of soil organic matter

单选题MDT为平均停工时间(Mean Down Time),也称为平均延误时间(Mean Delay Time),它等于()A预防性时间+纠正性时间B纠正性时间+等待时间C纠正性时间+预防性时间+等待时间D平均修理时间-平均间隔时间

单选题The maximum difference between mean time and apparent time is ().Aequal to the longitude expressed in time unitsBabout 16 minutesCthe difference between the GHA of mean sun and the first point of AriesD15°of arc

单选题MDT为平均停工时间(Mean Down Time),也称为平均延误时间(Mean Delay Time),它等于( )A 预防性维修时间+纠正性维修时间B 纠正性时间+等待时间C 纠正性维修时间+预防性维修时间+等待时间D 平均修理时问-平均间隔时间

填空题货车停留时间指标包括()停留时间、()停留时间、中转车平均停留时间、货物作业车平均一次货物作业在站平均停留时间。

单选题X线平均波长(λmean)与最短波长(λmin)的关系是(  )。Aλmean=3λminBλmean=2.5λminCλmean=2λminDλmean=1.5λminEλmean=λmin

判断题通常使用平均修复时间MTTR(Mean Time to Repair)和平均故障间隔时间MTBF(Mean Time Between Failure)这两个指标来评价产品或系统的可靠性。A对B错

单选题A mean sun is used as the reference for solar time for three reasons. Which reason is NOT a cause for use of a mean sun?()AThe motion of the apparent sun is along the eclipticBMeasurement of time is along the celestial equatorCThe speed of the Earth's revolution is not constantDThere are variations in the Earth's rotational speed

单选题The time interval between the transmission of signals from a pair of Loran-C stations is very closely controlled and operates with().AAn atomic time standardBDaylight Savings TimeCEastern Standard TimeDGreenwich Mean Time

填空题MTTR(Mean Time To Repair):()。

判断题统可靠性是指该系统在服务时间内可靠工作的程度,常用平均修复时间(Mean Time To Repair,MTYR)来衡量。A对B错