压下

Drift electron mobility, the Hall factor and Hall mobility in GaN are calculated according to Mattiessen's rule as a function of temperature for carrier concentrations with the compensation ration as a parameter on the basis of taking into account the individual average scattering momentum relaxation time of four scattering mechanisms, namely, ionized impurity scattering, polar mode optical scattering, acoustic piezoelectric scattering and acoustic phonon deformation potential scattering which have an effect on electron mobility of GaN.

考虑了对纤锌矿型氮化镓低场电子输运影响最为显著的4种散射机制－电离杂质散射，极化光学波散射，声学波压电散射和声学声子形变势散射的单个平均动量驰豫时间，采用Mattiessen's rule计算了不同补偿率以及不同载流子浓度条件下，氮化镓电子漂移迁移率，霍耳因子以及霍耳迁移率随温度的变化。

Impregnation behavior of fluids across the unidirectional weave stacks in the transverse direction of fibers under vacuum pressure was investigated elementally by using self-designed tools, and parameters of the operational method were standardized by a series of experiments.

使用自行设计的装置对真空压作用下液体沿单向织物厚度铺层方向的渗透特性进行了初步研究，通过一系列实验对设备和操作方法进行了规范。

Generally in terms of inches elongation per inch of material.

在一定的压力下金属的延长及压缩量。

In order to be deformed, the sections must be made with resins of high elongation at break.

这样，在不出现机械损伤的情况下，槽罐被压扁后可恢复原形。

Enhance the visual appeal of your images with drop shadows, embossing, and blending.

加强视觉的吸引力，您的图片与下拉阴影，压花，以及混色等。

By using the finite element method and the empiric formula, the deformation of the entire pipe under the actions of the internal pressure and the high temperature and the bending moment on each section are obtained in this paper.

利用有限元方法和经验公式求出了整体锅炉管道在内压和温度作用下的变形及各截面上的弯矩，重点分析了椭圆形截面管上各点的环向应力。

Results There was difference in the accurance of intra-operative acute encephalocele and postoperative brain incarceration between two groups.

结果 术中急性脑膨出及术后脑嵌顿发生率在两组间比较有差异；术后中线移位、环池受压情况及术后脑积水、硬膜下积液发生率比较均无明显差异。

Mudstone undercompaction phenomenon is one of the important characters of Eocene strata in the Dongtai depression of the Subei basin.

泥岩欠压实现象是苏北地区，特别是苏北盆地东台坳陷下第三系地层中重要的地质特征之一。

Methods Thirty patients with diabetic peripheral neuropathy underwent surgical decompression on inner malleolus tube nervus tibialis and the branches, knee lateral nervus peronaeus tube common peroneal nerve, musculocutaneous nerve of dorsum pedis in both lower limbs, so as to decompress the nerves, epineurium and bundle membrane.

30例糖尿病周围神经病人进行双下肢神经松解，在显微镜下分别在内踩管胫神经及其分支、膝外侧腓神经管腓总神经、足背腓深神经处用显微外科技术分别减压受压神经及切开松解神经外膜、束膜。

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。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。