寿命

Based on filtering theory, a residual life predict model is set up according to condition information, and a general formula of parameter estimation is deduced using maximum likelihood estimation, thus, when the life distributing of an equipment is known, the model can be rapidly educed by taking the distribution into the formula is educed, and its residual life can be predicted without complex iterative process is predicted.

利用滤波理论，建立了基于状态信息的剩余寿命预测通用模型，并推导出采用极大似然估计法下参数估计的通式，使得在已知寿命服从其他任何分布形式时直接代入通式便可快速地得出其模型，从而预测其剩余寿命，省去了复杂繁琐的迭代过程。

But the using life of the smoothing capacitor is greatly reduced be- cause of the heat generated by the excessive ripple current on the ESR of the smoothing electrolyte capacitor.

但是电解电容器最大的缺点就是使用寿命问题，特别是在高温条件下尤为明显，电解电容器的寿命直接影响着变频器/逆变器的使用寿命。

Generally, the steel rolling furnace's service life is 3-10 years, the wrought steel chamber furnace is about 2 years, and the soaking pit side nozzle furnace's is 3-6 years.

轧钢加热炉的使用寿命一般为 3 ～ 10 年，锻钢室式加热炉的寿命约为 2 年，单侧上烧嘴均热炉的使用寿命一般为 3 ～ 6 年。

After shape memory treatment at 673～773K,the transformation type of this alloy was .The Ti-Ni SMA spiral spring had longer fatigue limit when heat treatment at 773K.The fatigue ...

结果表明，在 673～ 773K热处理状态下，该合金的相变类型为，经 773K热处理后，弹簧有较高的疲劳寿命；用冷加工率较小的Ti Ni丝绕制的弹簧疲劳寿命较高；喷丸处理可有效提高该弹簧的疲劳寿命。

Fatigue axle housing to the life-cycle analysis, by the subframe distribution of fatigue life and the life span of the value of the danger node.

Fatigue对该桥壳进行全寿命分析，得到该副车架的疲劳寿命分布和危险点的寿命值。

Test results show that the equivalent strain method exhibits a higher life assessment precision as compared to that by linear damage summation. The critical damage formula for equivalent strain can quite well predict the actual damage incurred and the equivalent strain-life curve with hardness modification fundamentally conforms with the pure fatigue strain-life curve.

试验结果表明，在预测寿命时等效应变法比线性累计损伤法具有更高的精度，等效应变的应力下临界损伤公式能够很好地预测实际损伤，考虑硬度修正的等效应变-寿命曲线和纯疲劳应变-寿命曲线基本一致。

In this paper, the definitions of reliability and MTTF of unrepairable systems with fuzzy random lifetimes are given, respectively.

为了和传统可靠性理论保持一致，我们仍用系统可靠度和平均寿命作为衡量系统可靠性的主要指标，但是在这里我们给出了全新的定义，即系统可靠度定义为不可修系统在t时刻仍正常工作的平均机会，平均寿命定义为模糊随机不可修系统寿命的期望值。

In a probabilistic analysis of unrepairable systems, system behavior is described by reliability and mean time to failure, in which the reliability is defined by the probability of the random event "system is functioning at time t", and MTTF the expected value of random lifetime of system.

衡量不可修系统可靠性的指标主要是系统可靠度和平均寿命。其中系统可靠度定义为不可修系统在t时刻仍正常工作的概率，平均寿命定义为不可修系统寿命的期望值。

On the basis of a few facters which affact the house s vives , it is possible and necessary to analyze and prove how to longer the house s vives , and to propose some of the useful aspects which is about longering them.

在分析影响房屋使用寿命诸因素基础上，论证延长房屋使用寿命的可能性和必要性，提出延长房屋使用寿命的可行途

Lastly, to test the efficacy of shim plate in the single hole plate and research the fatigue life of single hole plate by means of changing the thickness and size of shim plate and the various torque, and then to test the shim plate efficacy at the abutting joint part for studying the fatigue life of the screw connecting component and rivet connecting component of typical wainscot of X air plane.

最后，首先在单孔板上试验垫片的功效，通过改变垫片的尺寸厚度、垫片面积及垫片在承受不同大小力矩下，分析研究单孔板的疲劳寿命，确定垫片尺寸厚度、面积和力矩对单孔板寿命的影响。其次在对接件上试验垫片的功效，研究运X飞机典型壁板螺接结构件和铆接结构件的疲劳寿命。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失