光

Since the presence of a out coupling hole alters the transverse structure of the intra cavity light in a FEL oscillator ,the finite element method is used to the optical field equations and a good proximation is made for the out coupling process in the mirror,and then some numerical results are given.

针对孔耦合波导自由电子激光振荡器腔内光场横向特性，应用有限元法于慢变光场方程，并对输出腔镜上孔耦合过程加以较准确的描述，而后通过对数值结果的分析比较，说明这一模拟方法较好地描述了孔耦合引起的腔内光场横向结构的变化发展特性，改善了模拟结果。

The saplings of tree species Schima superba, Castanopsis fissa and understory shrub species Psychotria rubra, Ardisia quinquegona were grown for 8 months under 100%, 36% or 16% of full sunlight.

4种植物生长于 10 0 %、36 %和 16 %的自然光下 8个月，叶片的光化学速率和热能耗散速率随光强增大而提高，热能耗散占总的光能吸收的比例也因光强不同而改变，16 %光下的相对热耗散率约为 40 %～ 45 %，10 0 %自然光下增大至 5 0 %～ 75 %。

Compared to the control, the increment in membrane permeability, MDA and Pro contents were smaller, and the reducement in activities of SOD and POD, contents in soluble protein, dry weight of aboveground, dry weight of underground, plant height and stem diameter were smaller in leaves of pepper under low temperature and poor light stress with PEG seed-soaking. These results suggested that PEG seed-soaking could increase the resistance ability to low temperature and poor light stress of pepper seedlings.

PEG浸种处理可使辣椒幼苗地上部干质量、地下部干质量、株高、茎粗和叶片SOD、POD活性、可溶性蛋白含量的下降幅度均较低温弱光对照显著减缓，细胞膜透性、MDA与Pro含量的增加幅度均较低温弱光对照显著降低，表明PEG浸种处理能够提高辣椒幼苗对低温弱光的适应能力。

According to the invention the second light element is formed as a separate LED module with a fitting and a second lamp cap whereby the first and the second light elements are removably attached via the fitting and the second lamp cap, the fitting and second lamp cap providing electrical and mechanical connection between both light elements.

根据本发明，第二光元件被形成为具有配件和第二灯帽的分开的LED组件，由此第一和第二光元件通过该配件和第二灯帽被可移动地附着，该配件和第二灯帽提供两个光元件之间的电气和机械连接。

On the basis of previous work in our laboratory, several novel thiosemicarbazones and semicarbazone compounds containing pyrazolone-ring have been synthesized.

本文在实验室原有工作的基础上，合成了以吡唑啉酮环为变色主体的缩氨基脲、氨基硫脲类有机光致变色化合物，通过对固态光致变色性质和晶体结构的研究，深入分析了它们的变色机理，并总结了光致变色性质与之间结构的关系。

Friction on a smooth pin increased in the order: bright, semidull, and dull.

在光滑的导纱杆表面，摩擦增加次序为：有光，半无光和无光纤维。

When a sinusoidally modulated light spot was presented at their receptive field center,the on-center and off-center cells responded half a cycle (=180°) out of phase with one another at all intensities tested.

当正弦调制的光点投射在它们的感受野中心时，在不同的刺激强度下，给光中心细胞和撤光中心细胞的反应相位彼此相差半个周期(180°)。

The feasibility of a spheric polishing by FRP-1 flexible polishing machine is proved by experiments.

为了研究FRP-1型非球面柔性抛光机加工非球面零件的可行性，利用FRP-1型非球面柔性抛光机对非球面光学零件进行抛光实验。

If you've ever stubbed your toe in the dark, you know how much we need light to navigate—not only with our vehicles but even with our hands and feet.

假如你曾经在黑暗中踢到自己的脚趾，你便会知道我们是多么需要光才能前行，不但我们的车辆需要光，就连我们的手和脚也需要光。

The invention solves the problem of accessing to network by using infrared or low power laser light communication in subrange, especially aims at multi users on-line by optical signal in room place and being liable to interference with WLAN build with conventional air wave transmission. The optical accessing LAN consists of an accessing point and multi users devices.

本发明涉及局域网通信技术领域，公开了一种光接入局域网系统，能够解决局部范围内以红外线或低功率激光的光通讯方式上网的问题，特别是针对室内空间多用户以光信号传输方式上网的情况，以及解决以传统无线电波传输方式组建WLAN的易受干扰信息安全问题。

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。