寿命

For example, we use geometric distribution to describe the life distribution of runs of a species in transect surveys of plant populations and inventory demand distributions. In the theory of reliability, geometric distribution is one of the most important discrete probability distributions because of its loss of memory.

在可靠性理论中，由于几何分布的无记忆性，使得其是离散型寿命分布中最为重要的寿命分布之一，其相当于指数分布在连续型寿命分布中的地位，这正如程侃研究员在文献[5]中所指出的"在离散寿命的情形，几何分布起着连续情形下指数分布所起的作用"一样。

The time-resolved technique currently used, is generally utilized to improve selectivity by adjusting delay sampling time. It is effective for eliminating the interference from signals with shorter lifetime to that with longer lifetime, but the revers is invalid.

目前所使用的时间分辨荧光光谱分析技术，一般都是通过延迟一定时间后再对样品信号采样，这对于消除短寿命信号对长寿命荧光信号的干扰非常有效，但不能消除长寿命信号对短寿命信号的干扰。

In chapter 8, the commom procedure of remanent life assessment is given. The method of remanent life assessment based on the history and the method of remanent life assessment based on the detection are presented, and the realization procedure of the methods is discussed.

第八章就剩余寿命的一般理论进行了讨论，建立了剩余寿命评定的一般工作过程，在此基础上，提出了基于历史的剩余寿命估算方法和基于检验的剩余寿命估算方法，并分别对这两种方法的实现过程作了讨论。

The results show that wet air reduces both fatigue life and strength with the influence-factor of 0.6059 and 0.8722, respectively. Wet air environment enlarges the dispersivity of fatigue life, therefore using the corrosion-influence-factor obtained by eigenvalue or mean value to predict the fatigue life with high reliability will cause an unconservative conclusion.

结果表明，潮湿空气环境显著降低了2024-T3铝合金的疲劳性能，潮湿空气环境对其疲劳寿命特征值和疲劳强度均值的影响系数分别为0.6059和0.8722；在潮湿空气环境中疲劳寿命的分散性变大，用疲劳寿命的中值或特征值得到的腐蚀影响系数进行可靠度95%的腐蚀环境下的寿命修正，将得到偏危险的结果。

Three different kind of methods are used to predict the blade's life, which are linear damage cumulating method, viscoplastic damage uniform constitutive model for certain key points, and viscoplastic damage uniform constitutive model with FEA program for whole blade.

对叶片的寿命预测采用了三种不同的方法，包括传统的线性损伤累积寿命预测方法、粘塑性损伤统一本构模型对关键点的寿命预测方法，以及粘塑性损伤统一本构模型有限元方法对整个叶片进行寿命预测。

In this paper the photocathode and micro channel plate, the two key factors affecting image intensifier operational life, are also analyzed in detail and are listed the life test methods in night vision ind...

通过对国内外加速寿命试验和像增强管工作寿命试验方法的分析借鉴，结合我们二代近贴管二十多年的生产试验，特别是超二代管工作寿命试验积累的宝贵经验，本文提供了一种加速试验方法，在保证像增强管阴极灵敏度稳定性的前提下，采用一个对光电阴极影响最大的应力加倍的方法，以缩短工作寿命试验时间，减少生产周期以保证交货进度。

First, the theory of fretting wear and studies on fretting fatigue were introduced and the parametric method was used in the process of creating the model of dovetail joints in UG software. The elastic contact problem is analyzed in finite element method and is used to the parameters' distribution and contact stress of the joint are obtained on the base of ANSYS code. With the effect factor of load frequency, the prediction method of fretting fatigue life of dovetail joint under low and high/low cycle complex load is proposed. The proposed model and the approach were verified by experiments.

本文介绍了微动损伤的机理和微动疲劳寿命的研究方法；利用UG软件对燕尾榫联接结构创建了参数化实体模型；基于ANSYS软件平台求解弹性接触问题，获得了榫联接结构接触应力及接触状态量的分布；在已有微动疲劳寿命预测模型的基础上，引入载荷频率影响因子，对低周、高低周复合载荷作用下的燕尾榫联接结构进行了微动疲劳寿命的预测，与试验结果对比表明采用本文提出的方法预测榫联接结构的微动疲劳寿命是有效的。

Quality Products Quality products category life testing machine (mouse switch life testing machine, the mouse encoder life testing machine, wire pull testing machine, port plug life testing machine, the mouse DPI tester, wire tester Swing Life expectancy; etc.).

鼠标开关寿命测试机，鼠标编码器寿命测试机，线材拉力测试机，端口插拔寿命测试机，鼠标DPI测试仪，线材摇摆寿命测试机；等

The main products include: 1, tensile strength, universal testing machine: microcomputer-controlled universal testing machine, economic-type universal testing machine, tensile testing machine micro-computer, electric / manual (Vertical / Horizontal / double pole / single pole) Rally Units, micro-computer plug test machine, spring tension and compression testing machine, etc.; Second, environmental testing machine series: constant temperature and humidity chamber, drying oven, large load-aging room, walk-in constant temperature and humidity test chamber , Thermal Shock Test Chamber, UV weathering tester, salt spray testing machine, aging chamber three, cartons, packaging, furniture testing machine series: microcomputer carton compression testing machine, the breakdown strength test machine, drop (single arm / arms) Test Units, Units microcomputer vibration test, vibration test Analog Motor Transport Units four, electrical equipment testing machine series: plug wire bending test machine, drum testing machine plugs, plug wire hoist swing test machine, plug-line static tensile testing machine, sudden pull test machine, power cord bending test machine, combustion testing machine, 90-degree peel strength testing machine, torsion testing machine wire, wire abrasion test machine, flexible wires and flexibility testing machine, wire print Kennedy fastness testing machine, measuring the rate of wire testing machine, fatigue test handset line stretching machine, plug test machine, torsion testing machine cold, temperature testing machine, wire thermostat ball pressure testing machine, hot wire tester, leakage from marks tester, wire short-circuit / open circuit / high pressure / low pressure / insulation / conduction / mispairing tester; Friday, computer, mobile phone tester series: Life expectancy axis testing machine, testing machine life clamshell mobile phone, key life testing machine, resistance friction test machine, fully automatic torque tester, mobile Units drop test, tape wear-resistant test machine, the mouse roller life test machine; six, rubber, plastic, tape testing machine series: wear test machine, folding / Wear-resistant test machine, winding machine, vertical / rebound test machine, the permanent distortion compression test machines, foam compression stress test machine, foam plastic repeated compression test machines, test material removed machine, plastic machine Determination of Melt Index , melting point tester, heat distortion temperature test trough, falling ball / drop down / DuPont impact test machine, to maintain constant temperature test tape machine, adhesive tape early bowls tester, hardness tester, peel strength testing machine; seven, footwear, leather , Testing Machine Series: friction test machine, add sulfur testing machine, conveyor-type Needle detector machine, friction dyeing fastness tester, testing machineDecoloration friction, standard light box, cold testing machine

主要产品包括：一、拉力强度、万能材料试验机：微机控制万能材料试验机、经济型万能材料试验机、微电脑拉力试验机、电动/手动（立式/卧式/双杆/单杆）拉力台、微电脑插拔力试验机、弹簧拉压试验机等；二、环境试验机系列：恒温恒湿试验箱、干燥箱、大型负载老化室、步入式恒温恒湿试验室、冷热冲击试验箱、UV耐候试验机、盐水喷雾试验机、老化试验箱三、纸箱、包装、家私试验机系列：微电脑纸箱抗压试验机、破裂强度试验机、跌落试验台、微电脑振动试验台、模拟汽车运输振动试验台四、电工器材试验机系列：插头引线弯折试验机、插头滚筒试验机、插头线吊重摆动试验机、插头线静态拉力试验机、突拉试验机、电源线折曲试验机、燃烧试验机、90度剥离强度试验机、电线扭转试验机、电线耐磨损试验机、可挠电线柔软度试验机、电线印刷体坚牢度试验机、线材测长率试验机、听筒线伸缩疲劳试验机、插拔力试验机、低温冷挠试验机、温升试验机、电线恒温球压试验机、灼热丝试验机、漏电起痕试验机、线材的短路/断路/高压/低压/绝缘/导通/误配测试仪；五、计算机、手机试验机系列：转轴寿命试验机、手机翻盖寿命试验机、按键寿命试验机、耐磨擦试验机、全自动扭力试验机、手机跌落试验台、纸带耐磨试验机、鼠标滚轴寿命试验机；六、橡胶、塑料、胶带试验机系列：磨耗试验机、耐折/耐磨试验机、曲折试验机、垂直/反跳弹性试验机、永久压缩歪度试验机、泡棉压缩应力试验机、发泡塑料反复压缩试验机、试料磨平机、塑料熔融指数测定机、融点测试机、热变形温度试验槽、落球/落垂/杜邦冲击试验机、恒温胶带保持力试验机、胶带初粘性滚球试验机、硬度计，剥离强度试验机；七、制鞋、皮革、试验机系列：磨擦试验机、加硫试验机、输送式检针机、磨擦染色坚牢度试验机、双锤磨擦脱色试验机、标准光源箱、耐寒试验机

At 20.1℃ and RH 48.9%, The longest longevity and mean longevity per fe male and male of south-American leaf miner tested indoor in 1998, the following were 17d, 7d and 5.3d, 3d in 15%cane sugar cott on, and 19d, 6d; 10.6d, 3.5d in broad bean seedling.

在恒温20.1℃，RH48.9%的条件下，用蚕豆苗和用吸足15%的蔗糖水的棉球饲养南美斑潜蝇，测得雌、雄成虫的最长寿命、平均寿命及在蚕豆苗上的最高产卵量、平均产卵量。15%蔗糖水棉球饲养雌、雄成虫最长寿命及平均寿命是17d，7d，5.3d，3d。

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