Through investigation,the authors figure that the average lifetime of the concrete dams in China is about 30-50 years.
阐述了坝工混凝土及其建筑物寿命的现状 ,指出国外坝工界认为混凝土坝的耐久寿命至少为 10 0 a,而我国混凝土坝的平均寿命为 3 0～ 5 0 a,2 1世纪我国将要付出高昂代价去加固修复病坝、危坝。
In this paper a topologic analysis on the reliebility index system for power plant s protective devices is outlined, in it proposed a concept and algorithm on average life s corrent value to refrain from some weakness of the average life value.
对电站保护装置可靠性指标体系引用拓扑理论进行了概要分析，其中针对平均寿命值的弊端提出了平均寿命当时值的概念及算法。
This paper applys Bayes method and historic testing datas and the informations provived by industral technique to make Bayesian demostration test sampling plans of mean life θ=1/λ,thus decreasing working times.
采用Bayes方法,利用历史试验数据及工程技术经验所提供的先验信息,制订了平均寿命θ=1/λ的Bayes验证试验抽样方案,以达到减少试验工作量的目的。
Aiming at the problem how to determine whether the samples are IID, this paper analyzes the test of IID samples and discusses the statistic analysis of reliability under IID and non-IID conditions by taking the mean life for example.
如何判别样本是独立同分布 ?针对此问题 ,本文讨论了样本独立同分布的检验 ,并以平均寿命为例 ,对样本独立同分布和非独立同分布条件下可靠性统计分析进行了讨论。
This paper gives an assessment method for the mean life of complex system based on component test information.
提出了一种利用复杂系统组成设备的试验信息,对复杂系统平均寿命进行综合评估的方法。
In this paper,a new approach which combines the least-square method with Bayes theorem,takes advantage of the parameter estimation for single Weibull distribution was developed to estimate the mean time to failure and the reliability estimation of the mixed Weibull population.
通过联合运用最小二乘法、贝叶斯定理和对单一威布尔分布的参数估计法,对服从混合威布尔分布的电工产品平均寿命及可靠度进行了估计,并结合实际试验数据进行了计算。
The estimation of the median lifetime and the mean time to failure and the confidence limits of the mean time to failure of electrical products were given.
联合利用中位秩及最小二乘法给出了估计威布尔分布参数的一种新方法,给出了电工产品中位寿命、平均寿命及平均寿命置信限的估计,并结合实际试验数据进行了计算。
In the theory research and application work of the reliability, we wish to find the accuratecalculating formula about the mean time to failure of the products easily.
在可靠性理论研究与应用工作中,需要计算产品平均寿命。
Monte Carlo Method of MTTF Evaluation for Large Complex System;
大型复杂系统平均寿命评定的Monte Carlo方法
The MTTF s evaluation of large-scale complex system with MATLAB and monte carlo;
用MATLAB实现蒙特卡罗法评定大型复杂系统平均寿命
We derive the reliability and MTTF of the system.
当开关寿命服从指数分布时,我们得出系统的可靠度和平均寿命。
Efforts have been made by employing reliability theory to determine the reliability failure rate of vacuum electronic devices in terms of failure rate and average lifetime,By comparing the failure models in the new edition of electronic equipment reliability prediction handbook(GJB299B) with the old edition(GJB 299 A), it has been proved that the prediction failure model.
以磁控管现场使用数据和失效模式为基础，根据真空电子器件失效率或平均寿命等可靠性指标的考核方法，对新版（ＧＪＢ２９９Ｂ）电子设备可靠性预计手册中的失效率模型与旧版（ＧＪＢ２９９Ａ）进行了验证对比。
Deducing the uncertainty in energy of one dimensional harmonic oscillator equals zero, and average lifetime equals infinity.
推出一维谐振子的能级的能量不确定范围等于零,能级的平均寿命等于无穷大。
The analytic expressions of the reliability and the average lifetime of the system are obtained.
研究了由3个部件组成的温贮备不可修系统,在转换开关不完全可靠的情形下建立了系统模型,推导出系统可靠度和平均寿命的解析表达式。
mean time to failure
平均寿命时间（MTTF）
mean life of excited atom
受激原子的平均寿命
Estimated (Expected) Average Life
预计(预期)平均寿命
High luminous efficacy, average life-span 8000 hrs.
高光效，长寿命，平均寿命长达8000小时。
Life expectancy is now 82.5 years for women and 77.7 years for men.
女性的平均寿命是82.5岁，男性平均寿命是77.7岁。
Mean Life Evaluation on Power LED Through Accelerate Life Test
加速寿命试验评估功率发光二极管平均寿命
The average life expectancy for metastatic colon cancer patients is about2 years.
转移的结肠癌患者平均寿命是2年。
The average life span for the nominee group was just over 76 years.
提名者小组的平均寿命略高于76岁。
The average life expectancy for Russian men is just fifty-eight years.
俄罗斯男人的平均寿命只有58岁。
Life expectancy is now 75.5 years.
现在的平均寿命已达到75。5岁。
The average age of the 70 people is 57.74.
70人的平均寿命为 5 7.74岁。
Even so, the life expectancy rate has increased since last year.
不过，国人平均寿命比前一年成长了。
Inference of Two Mean Life Spans Ratio;
无替换定数截尾寿命试验平均寿命比率统计推断的研究
On the Confidence Limits for the Mean of Exponential Distribution With Non-equal Censored Time;
非等定时截尾寿命试验方案指数分布情形平均寿命的置信限
It said Brighton residents lived to an average of 78 years, a year more than the average of the 15 sampled cities.
调查表明，布莱顿居民的平均寿命为78岁，比15个抽样城市的居民平均寿命长一年。
Safety voltage,use is convenience,Average life is 1000h.
特点：安全电压,使用方便,平均寿命1000小时.
With the average lifespan, marriage and childbearing ages all continuing to rise,
鉴于平均寿命、适婚年龄、和生育年龄持续上升，
And hence the mean lifetimes of the two brands of engines, are equal.
也就是说，两种牌号引擎的平均寿命是相等的。