查询词典 al

Keywords Al base immiscible alloy;directional solidification;solid/liquid interface;repulsion/engulfment/entrapment;microstructure development

Al基难混溶合金；定向凝固；固/液界面；排斥/吞并/捕获；组织演变

The vapour and plasma ignition times of the target are got based on the equation of heat conduction and cascade model. We suppose that the plasma is ignited when 210 generations of new electrons are born in vapour generation time. The influence of temperature on the thermodynamics and optics parameters of material also have been considered in the model. The resulting theory has good agreement with the experiment and overseas report. A blade method to measure the laser spot is given in this paper with validation and error analysis. The plasma threshold of metals in atmosphere and water ambients both are diagnosed with the light deflection and piezoelectric transducer. A Q-switched pulsed Nd:YAG laser operating at infrared (1064nm), visible(532nm) and ultraviolet (355nm) wavelengths has been used. Al、Fe、Cu are used as targets and get a similar results with both method. Theoretical and experimental analyses are applied on the influence of wavelength on the threshold have been done, both of which have shown that the plasma threshold of metals decrease as the laser wavelength increases; The plasma threshold of metals are higher in water than in air and the pressure of the shock wave in water is five times higher than in air.

从热传导方程和雪崩电离机制出发，假设当电子增值2~(10)倍时，考虑了温度对材料热力学和光学参数的影响时，得到了气化和等离子体点燃的时间，利用该模型进行计算得到的结果与国内外报道及自行通过实验测得的阈值基本一致；提出了利用刀刃法测量激光光斑面积的方法，并通过实验进行了验证和误差分析；利用光偏转装置和压电换能器分别对空气和水中金属等离子体点燃阈值进行了实验诊断，激光器均为调Q—YAG激光器(波长1064nm，532nm，355nm，脉宽10ns)，靶材分别为Al、Fe和Cu，两种测试方法得到的等离子体点燃阈值基本一致；本文从实验和理论计算两个方面讨论了波长对等离子体点燃阈值的影响，均得到了等离子体点燃阈值随着波长的增加而减小的结论；对空气中和水中不同环境下金属等离子体的点燃阈值进行了比较研究，得到了金属在水中的等离子体点燃阈值比空气中的大，且水中产生的冲击波的压强是空气中的5倍左右的结论。

All functions and methods defined in this module are equivalent to the C functions with "AL" prefixed to their name.

本模组所定义的所有函数及方法和 C 中以"AL"前缀的同名函数是等价的。

I Materials for stainless steel professional factory can provide the following special alloy materials desulfurization systems:(1) 00Cr21Ni24Mo6N (equivalent to the United States AL-6XN, Germany 1.4529);(2) F44 (equivalent to 254SMo and 31,254 abroad);(3) 904L;(4) 317L and 317LMN;(5) C-276;(6) Duplex Stainless Steel: 2205,2207 and so on.

我公司为不锈钢材料专业制造厂，可提供以下脱硫系统专用合金材料：(1)00Cr21Ni24Mo6N(相当于美国AL-6XN，德国1.4529)；(2)F44(相当于国外254SMo和31254)；(3)904L；(4)317L和317LMN；(5)C-276；(6)双相不锈钢：2205、2207等。

Et al.(2002) to estimate energy efficiency.

et al。(2002)的方法，进行能源效率的估计。

As reported on page 205 of this issue, Miller et al.

在这期第205页的报告中，Miller et al。

In a study of adults older than 55 years, Chermack et al.

在一项成人的研究中超过 55 年， Chermack et al 的资深者。

A series homopolyme of ethylene synthesised by metallocene catalyst was analyzed by the high temperature gelatin permeation chromatography. The results showed that the molecular weight distribution changed not too much when the ratio of Al/Ti ranging between 1000 and 4000, while the molecular weight distributed increased from 2.48 to 2.81 when the ratio ranging between 4000 and 7000; catalyst D had the lowest activity to be used as asymmetric metallocene catalyst; the curve of molecular weight moved much to the left with the increases of temperature and two active centres appeared when the temperature is 70℃.

通过高温凝胶渗透色谱对茂金属催化合成的一系列乙烯均聚物进行了分析，可以看出Al/Ti比从1000变到4000时，分子量分布曲线图变化不大，而从4000变到7000时，变化相当大，分布宽度从2.48增至2.81；催化剂D的活性最小，可作为非对称性茂系金属催化剂；该聚合体系分子量的大小受聚合温度的影响很明显，随温度的升高，分子量分布曲线图向左发生很大位移，在聚合温度为70℃时存在两个活性相当的活性中心。

The effect of Al element on the microstructure and tribological behavior of Ti-Si eutectic alloys has been investigated.

研究了Al元素对Ti-Si共晶合金显微组织和滑动摩擦学行为的影响。

The effect of the heat treatment on the undirectional eutectic structure of Al-Si was investigated.

研究了热处理工艺对定向凝固条件下Al-Si合金共晶组织的影响。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。