1) layout according to the same life
等寿命布置
2) constant life fatigue diagram
等寿命图
1.
Based on the equation, the article presents a new method by which constant life fatigue diagram of structural steel smooth specimens can be obtained, so long as material data for S-N curve of symmetry cycle (r = -1) are determined.
提出结构钢光试样等寿命曲线方程，并提出用等寿命曲线方程绘制结构钢光试样等寿命图的新方法。
3) equal life
等寿命
1.
Taking the fatigue life equilibrium of the components of the support system rotary kiln for as the optimizing goal, considering the fuzzy factors of constraints, such as contact stress between roller and tyre, tyre deformation and roller- axle interference joint unbreakage, the fuzzy optimization model of equal life of the kiln support system was built.
以支承系统各构件疲劳寿命相当为优化目标,考虑接触应力、滚圈变形、托轮、托轮轴配合面不脱开等约束条件的模糊因素,建立了支承系统构件等寿命模糊优化模型,并引入广义最大最小法,对模型进行求解。
4) life distribution
寿命分布
1.
Class of life distribution ｛IFRA t 0｝and property;
｛IFRAt_0｝寿命分布类及其性质
2.
Research on Very High Fatigue Life Distribution and High Reliability of Structural Components;
金属材料超高周疲劳寿命分布和元件高可靠性研究
3.
Very high cycle fatigue(VHCF)test of 66 specimens of aluminum alloy LC4CS was done by piezo-electric fatigue testing machine,and the fatigue life data showed that the fatigue life distribution of the alloy under VHCF has a characteristic of duplex peak,which is related to the locations of fatigue crack initiation.
寿命分布的双峰特征使得传统的升降法不能用于确定材料的超高周疲劳的条件疲劳极限,超高周疲劳寿命的分散性远大于低周和高周疲劳寿命的分散性。
5) Life distributions
寿命分布
1.
And the conditions of constant failure mechanism for some common life distributions are given.
讨论了一些常见的寿命分布失效机理不变的条件。
2.
A kind of delayed Poisson shocks model is introduced to produce NBU- [t0 ,∞ ) life distributions;This generalizes the result is that Poisson shocks model leads to the well known NBU life distribution.
讨论了一个延迟Poisson冲击模型以产生NBU-[t0,∞)寿命分布,这个结果是对Poisson冲击产生NBU分布的推广;研究了NBU-[t0,∞)寿命分布与已有寿命分布类NBU和NBU-t0的关系,利用灾难变换证明了它在协同结构下的封闭性,同时证明NBU-[t0,∞)与NBU寿命分布的卷积仍然具有NBU-[t0,∞)性质。
3.
The moment generating functions of life distributions is studied.
研究了两个寿命分布类的矩母函数,并给出了它们的一个上界。
6) lifetime distribution
寿命分布
1.
According to the failure of parametric estimation using probability papers and hypothetical examination,lifetime distribution type of production is studied with linear regression analysis method in this paper,and the optimization method of correlation coefficient and the least-squares method are used to calculate the distribution parameters.
本文以灯泡试验寿命作为计算实例,对产品寿命的四种累积分布函数分别线性化并求出了相关系数,得出了灯泡寿命分布以服从三参数威布尔分布最为合理的结论,给出了灯泡试验寿命的累积分布函数、可靠度曲线及其相关特征量。
2.
This paper has given the definition of a new kind of lifetime distribution and studied its relative properties(closeness mainly),based on the lifetime distributions studied by others.
在前人研究的寿命分布类的基础上 ,给出一种新的寿命分布类的定义 ,并研究了其有关的性质 (主要是封闭性质 )。
3.
The mathematical methods were used to make research into the living populations lifetime distribution,population lifetime distribution model and the intrinsic death invariant of the population were observed,and population lifetime mathematical expectation and variance were induced.
采用数学方法分析了自然条件下某生物种群的寿命分布 ,得到了种群寿命分布函数和种群内禀死亡常数 ,并由此推导出了种群寿命的数学期望和方差。
补充资料：种子的寿命(图)
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种子的寿命是指种子的生活力在一定环境条件下保持的最长期限。超过这个期限，种子的生活力就会丧失，也就失去了萌发的能力，影响种子寿命的因素很多，一方面决定植物本身的遗传性，不同植物的种子，其寿命差异很大，长的可达百年以上，如莲子；短的仅能存活几天或几周，如柳树、槭树。另一方面也与种子采收后的贮藏条件有关，一般贮藏种子的最适条件是干燥和低温，只有在这样的条件下，种子的呼吸作用最微弱，种子内营养的消耗最少，有可能度过最长时间的休眠期。此外，种子寿命也与母体植株的健康状况、种子本身的成熟度和种皮的保护状况以及病虫害对种子所产生的影响等因素有关。
种子贮藏年限的长短能影响种子的生活力，一般种子贮存愈久，生活力也愈衰退，以至完全失去生活力，至于种子失去生活力的原因，可能是由于酶的破坏以及胚细胞本身的衰退与死亡等因素造成的。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。