查询词典 a lifetime

In the single crystal of C60 with a FCC structure,positron mainly appears outside the C60 molecule.The main annihilation space is the interspace between molecules.The calculated positron bulk lifetime in C60 is 352ps, which agrees with experiment value of 356ps in literature.In carbon nanotube bundles with different dimeters,as the diameter of carbon nanotubes increases,the main space where positron appears changes from the interspace of carbon tubes to the space inside carbon tubes,the radio between positron annihilation with valence eletrons and core eletrons becomes larger,the positron bulk lifetime in carbon nanotube increase rapidly first and come to be a constant at the end.The calculated positron lifetime of carbon nanotube with a dimeter of 0.8～1.6ns is 332～470ps,which agrees with the experiment value of 394ps.Positron annihilation has been studied in widly used compound semiconductors.

计算结果表明：在片层结构的石墨晶体中，正电子主要在石墨层间的空隙中湮没，计算出的石墨中的正电子寿命为208 pS，与文献中的实验结果215 ps符合很好；在金刚石单晶中，正电子主要在碳原子之间的空隙中存在并发生湮没，计算出的金刚石中的正电子寿命为115 ps，文献中的实验结果110 ps左右符合；在面心立方结构的C60晶体中，正电子主要在C60分子球壳内外侧及分子之间存在，C60球形分子中心正电子分布很少，正电子的湮没区域集中在C60分子之间的空隙区域，计算出的C60中的正电子寿命为352 ps与文献中的实验结果356ps相符合；对于不同管径碳米管束中的正电子分布，随着碳纳米管直径的增加，碳纳米管束中的正电子由主要在碳纳米管管间的区域出现转变为主要在碳纳米管管内中心的区域出现：碳纳米管束中的正电子与碳原子的价电子的湮没概率变得越来越大，与核心电子的湮没概率变得越来越小；碳纳米管束中正电子的湮没寿命先迅速增大，而后趋于一定值。

My general goes with my lifetime energy and the real situation photograph husband godchild, in the basin of boiler bowl gourd ladle of smooth fact, tease in the be laughing and playing of 3 people in, it is in the ramble of a gardens shade, go searching the joy with this the realest lifetime.

我将用我毕生的精力与真情去相夫教子，在平实的锅碗瓢盆中，在三个人的嬉笑逗乐中，在家园林荫的漫步中，去寻找这一生最真实的快乐。

For the purpose of saving energy and prolonging the lifetime of ad hoc network, this dissertation discuss the network lifetime in detail, and consider the lifetime and energy synthetically, provide a minimal energy cost maximal lifetime broadcast tree construction algorithm.

2针对移动Ad Hoc网络能量有效性问题，为了节省网络使用过程中的能量消耗，提高网络的生命周期，本文对网络的生命期问题，展开了详细的论述，同时又将生命期与能量消耗结合起来考虑，提出了一个最小能量最长生命周期广播树的构造算法。

Take consider of the comparison of the light efficiency and the color rendering index we can find that: one piece of 1000W plasma lamp can equivalence to 2 pieces of 1000W metal halide lamp( no considering the light declining in ceramics metal halide lamp running ), and the lifetime of plasma lamp is 2 times to the metal halide lamp, so as a total by considering the lifetime and light efficiency indexes the one shot cost of metal halide is : 2×6500×2=26000YRMB, So we can find that the plasma lamp can save us 20500YRMB in the one shot cost.

根据两款灯发光效率和显色性的工程照明指标相比较得出：1个1000W的等离子灯相当与2个1000W金卤灯的照明效果（不计陶瓷金卤灯的后期光衰），而等离子灯的寿命是金卤灯的2倍，综合寿命和照明效果两项指标，在一次性投入上，金卤灯是2×6500×2=2.6 万元，由此可见，等离子灯的一次性投入比金卤灯节省2.05 万元。

A method of production of a reduction resistant dielectric ceramic composition having a superior low frequency dielectric characteristic and further improved in accelerated lifetime of insulation resistance, specifically a method of production of a dielectric ceramic composition containing a main component including a dielectric oxide of a specific composition, a first subcomponent including a V oxide, a second subcomponent containing an Al oxide, a third subcomponent containing an Mn oxide, and a fourth subcomponent containing a specific sintering aid in a specific ratio, including a step of mixing at least part of the materials of the subcomponents excluding one or both of at least the material of the third subcomponent and material of the fourth subcomponent with the starting materials prepared for obtaining the material of the main component to prepare the pre-reaction material, a step of causing the prepared pre-reaction material to react to obtain a reacted material, and a step of mixing the materials of the subcomponents excluded when preparing the pre-reaction material with the obtained reacted material to obtain a dielectric ceramic composition.

本发明提供一种介电陶瓷组合物的制造方法，其中介电陶瓷组合物以特定的比例含有如下成分：含有特定组成的介电体氧化物的主成分，该主成分可以提供具有优异的低频率介电特性的、绝缘电阻的加速寿命进一步提高的耐还原性介电陶瓷组合物的制造方法，含有V氧化物的第1副成分，含有Al氧化物的第2副成分，含有Mn氧化物的第3副成分，以及含有特定的烧结助剂的第4副成分；该方法包含如下工序：将至少除去第3副成分的原料和第4副成分的原料的一种或两种的其它副成分原料的至少一部分，与为了得到主成分原料而准备的起始原料混合，准备反应前原料的工序；使准备的反应前原料反应而得到反应后原料的工序；以及在所得的反应后原料中，混合在准备反应前原料时除去的副成分原料，得到介电陶瓷组合物原料的工序。

The concept of the lasing lifetime of working substance in the solid dye laser is promoted to liquid dye laser,and a twin laser beam testing method to measure the lasing lifetime is presented.

把固体染料激光器工作介质激射寿命的概念推广到液体染料激光器中，同时提出了一种针对液体激光染料激射寿命的双激光光路测试方法。

CEQRP can provide QoS guarantee and is aimed at extending the battery"s lifetime at each node by selecting the nodes with a longb attery"s remaining lifetime to forward packets. Simulation results show that CEQRP has good network performance. Furthermore, CEQRP shows distinct performance advantages in using a nodes electric energy efficiently. 4. The issue about optimal UDP packet size for mobile Ad Hoc networks when transmitting CBR traffic is studied.

基于无线Ad Hoc网络的特性，提出了适用于无线Ad Hoc网络的路由协议CEQRP(Cost-Efficient QoS Routing Protocol)，该协议不仅能为应用层提供QoS保证，而且能充分利用网络中剩余能量高的节点来中转分组，从而达到有效利用节点的电能、提高网络&寿命&的目的。

Lifetime of Cz-Si showed tendency of decrease - rise - rerise, but Lifetime of mc-Si showed rise - decrease -rerise and foemed a number of oxygen precipitates after three step annealing in N_2 ambient.

本文采用等离子体增强化学气相沉积制备了氮化硅薄膜。

Avoid sulfation for ordinary batteries, if they are in an overcharging mode or undercharging mode for a longtime, it will make the battery lose its internal water and lead to sulfation, thus greatly shortening charger's operating lifetime. But can solve batteries' problem of imbalance derived from longtime overcharging and undercharging, thus avoiding internal sulfation of the battery, restoring batteries' capacity and extending their operating lifetime.

避免硫酸盐化--普通电池如果长期处在一种过充电或欠充电状态中，会使电池内部不断失水和硫酸盐化，这样就会大大缩短充电器使用寿命，可是，它能解决电池长期过充电和欠充电引起的失衡，避免电池内部硫酸盐化，能够恢复电池容量，从而延长它的使用寿命。

With Orff Schulwerk, improvisation and composition start students on a lifetime of knowledge and pleasure through personal musical experience.

在奥福教学中，即兴表演和作曲开启了孩子将持续一生的音乐学习和快乐。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。