光发射

The multiple scattering which doesn＇t form loop can increase the mean free path, thus enhancing light amplification , and making laser in various directions.

不构成回路的多重光散射增加了激光在增益介质中的路程，使激光增强，并使激光沿各个方向发射。

It is characterized by : the mechanical mouse moves and rolling around key operations into switching signals Circuit square with the square wave signal to substitute for the original mouse photosensitive sensors within the pulse signal, using the switch can be achieved mouse cursor movement and the mouse double-click a single operation, and the use of transmitting and receiving circuits instead of the mouse line, a remote-control mouse.

其特征是：将机械鼠标的滚动动作和左右键的作转换成开关信号，用方波电路产生的方波信号代替原鼠标内光敏传感器的脉冲信号，用相应的开关动作可以实现鼠标光标移动和鼠标的单双击作，而用发射和接收电路代替原来的鼠标线，可以实现鼠标的遥控。

In the described system, in order to transmit the narrow-band analog signals or low speed digital signals at any time and under any climatic condition, sun-blind-region ultraviolet is used as information carrier, the modulated low voltage mercury-vapor lamp is used as emission device.

所描述的系统是以日盲区紫外光作为信息载体的，用被调制的低压汞蒸汽紫外放电灯作为发射器件，以日盲型滤光片和光电倍增管或日盲型紫外光电倍增管作为接收器件，以达到在任何时间和在任何气候下完成窄频带模拟或低速数字信号的传输。

A monochromator can separate specific wavelengths of interest, and a detector L, used to measures the intensity of the emitted light.

单色器可以把有用的特征波长分开，检测器用来测定发射光的强度。

A monochromator can separate specific wavelengths of interest, and a detector L,used to measures the intensity of the emit ted light.

单色器可以把有用的特征波长分开，检测器用来测定发射光的强度。

From the aspects of optical path structure, component design and optic-electric signal processing, the integrated measurement is realized.

分析了三种测量方法的共同性，指出它们在光源光束的发射、光束的传播途径即光路、光电信号的接收转换和处理上都有共同之处，为实现三种功能的集成打下了基础。

The new method can avoid fluorescence quench caused by high concentration of measured fluid and personal error. It is especially suitable for fluorescence analysis of condensate oils, light oils and some mud additives with lower wavelength than 400 nm.

该评价方法克服了荧光自熄和浓度消光现象，避免了人为产生的误差，测试结果有效性强，特别是对于凝析油、轻质油及荧光发射波长小于400nm的钻井液添加剂的荧光评价更为有效。

The most parts of thesis as follows:1. Five symmetrical intra-molecular charge transfer oligomeric phenylene vinylene light emitting materials were designed and synthesized using oligomeric phenylene vinylene as a framework.2. The structures of target molecule were characterized by ~1HNMR,~(13)CNMR, IR, MS and element analysis.3. In order to study the influence of the location and numbers of electron-donor and electron-acceptor on their photoelectric performance by changing length of OPV chain, the UV spectra and fluorescence spectra of target compounds has been compared. We have researched into main factors effecting on material emitting red-shift; organic electroluminescence device was prepared using the compound P4. The capability of eletroluminescence was researched.4. The photoelectric properties of P4 was explained by quantum chemical calculation (the Gaussian 98 quantum chemistry program). It is greatly contributed know the whole process of charge transfer to guide the design of red emitters.

本文研究的内容主要包括以下部分：(1)设计并合成5个对称的以齐聚苯乙烯类为骨架的分子内电荷转移型齐聚苯乙烯类发光材料；(2)通过IR，MS，~1H-NMR，~(13)C-NMR和元素分析对所合成的目标化合物进行表征；(3)通过对目标化合物的紫外光谱和荧光光谱比较分析，研究改变OPV的长度，电子给体和电子受体的位置及数量对其光电性能的影响，探讨材料发射红移的主要因素；选取性能良好的目标化合物P4制备成OELD器件，对其电致发光性能进行研究；(4)运用Gaussian98量子化学程序包，采用量子化学方法对目标化合物P4的光电性能从理论加以解释，进一步认识荷移跃迁的整个过程，为红光材料的设计加以指导。

In depth profile analysis of silvering layer on phosphor bronze stripe has been determined through rate of alloy calculated with the rate of pure component by glow discharge emission spectrometry .

应用辉光放电发射光谱分析技术，从纯金属求得难以测定的试样表层合金的溅射率，对磷青铜薄带的镀层合金进行表面逐层分析，得到镀层中银和铜含量随深度的变化曲线，同时测得了镀层的厚度。

The emission of light that does not derive energy from the temperature of the emitting body, as in phosphorescence, fluorescence, and bioluminescence.

发冷光：不是由于发光体的热量而来的光的发射，比如在磷光，荧光和生物性发光中。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。