查询词典 mean lifetime

An elementary particle in the lepton family, having a mass209 times that of the electron, a negative electric charge, and a mean lifetime of2.2?

介子轻子族中的一种基本微粒，其质量为电子的209倍，是一种负电荷，平均寿命为2.2？

Along with the population structure aging and mean lifetime lengthening, the cataract surgery increased significantly year by year.

目的：白内障是常见於中老年人的眼疾，随著人口结构的老化及平均寿命的延长，白内障手术有逐年增加之趋势。

This text constructs linear regression model of Chinese total fertility rate through regression analysis on 109 countries' 20 statistical data,such as per GDP,women literate rate,women mean lifetime.

针对3O多年来中国生育政策的人口效果、社会经济效果的评估，在2O世纪9O年代初便有学者予以关注(吴忠观、肖立见，1994)，到2O世纪末21世纪初有更多的学者对生育政策的效果进行了研究(李建民、王金营，2000；陈胜利，2001；杨魁孚等，2000)，政府有关部门也对此十分重视。

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。

If an additive of B less than 1.37 at.-%, some of B atoms solid-dissolved interstitially into matrix and distorted the lattice, thus the lifetime of positron in matrix dilated; the others of them segregated on vacancy-like defects and formed" filling effect", thus the mean lifetime and S parameters decreased. If B added up to 2.22 at.

在Ni_3Al合金中加入少量硼(≤1.37％)时，一部分硼原子以间隙方式溶解到基体中，使晶格发生畸变，导致基体中正电子寿命增长；另一部分硼偏聚到空位型缺陷上，产生&填充效应&，导致平均寿命■和S参数下降。

The value of active energy is determined to be 0.82 eV and mean lifetime in practical operation at driving current of 100 mA and an ambient temperature of 298 K is over 106 h, and high reliability and long lifetime required for light source of FOG are confirmed.

计算出了器件的激活能平均值约为0.82 eV，SLD管芯在室温下的工作寿命超过106 h，可以满足光纤陀螺用光源的寿命要求。对影响SLD管芯可靠性的因素以及管芯的退化机理进行了分析，为研制高可靠性的超辐射发光二极管提供了理论基础。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。