光电

At the same time, the electron energy distribution of NEA photocathode has been calculated. In chapter 3, the development of the dynamic spectral response measurement system is introduced in detail.

根据国内外NEA光电阴极的研究现状，提出了国内在NEA光电阴极研制方面存在的问题，阐述了本文的研究背景和意义。

Our factory has accumulated ten years of keyboard, optical mouse production experience, can provide a variety of series of keyboard, light electric mouse.

我们厂积累了十多年的键盘、光电鼠标生产经验，可以提供多种系列的键盘、光电鼠标。

Optical Mouse is the use of two pairs of perpendicular to each other within the photoelectric detector, with the work of PV panels.

光电鼠标是利用内部两对互相垂直的光电检测器，配合光电板进行工作的。

Referring to a measuring network composed of two or more photoelectric theodolites, an approach for precision analysis based on Cramer-Rao Lower Bounds of target position parametric estimation is proposed and the principles to locate the netted photoelectric theodolites is also given in the paper.

在由多台光电经纬仪组成的测量网中，提出一种基于目标位置估计Cramer-Rao限的精度分析方法，并给出了光电经纬仪组网测量布站应遵循的原则。

As the pioneer and technology leader for fiber optic in Taiwan, Baycom now are producing and design kinds of Coupler, WDM, Connecter, Converter, Transceiver, Optical Switch, Patch cord, Pigtail, Collimator, etc.

目前冠德光电已拥有完整之上、中、下游产品线，包含了各式光耦合器，分波多工器，光连接器，光电转换器，光传输模组，光纤光栅，跳接线，光纤引线，准直器等光通讯元件。

Our company was founded in 1996, is a sale of communications equipment and cable businesses, the company's main products include: Optical series; protocol converter series; optical transceiver; light MODEN; cable boxes and follow-up; telephone cable and a variety of fiber optic cable and related equipment; optical fiber, digital, audio patch panel equipment; photoelectric transfer me; fiber-optic connectors and adapters; photoelectric series products; light, digital measurement instruments, gauges and maintenance; Shrinkable Tube ; optical passive device series; crystal top range of communications products.

我公司成立于1996年，是一家销售通信设备及线缆的企业，公司主营产品包括：光端机系列；协议转换器系列；光纤收发器；光MODEN；光缆接续盒及终端盒；市话电缆及各种光缆及相关器材设备；光纤、数字、音频配线架设备系列；光电交接箱；光纤连接器及适配器；光电系列产品；光、数字测量仪器、仪表及维修；热缩管；光无源器件系列；水晶头等一系列通信产品。

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 the thesis, the researches and development on the preparation, structure, photoconductive properties, and application of organ...

本文介绍了有机、无机及有机/无机复合光电材料的研究进展，对其结构、光电性能、制备方法及应用背景作了详细的总结、分析和讨论。

The feedback circuit employs a GaAs photoconductive switch, which has simple structure and reliable performance.

光电反馈线路采用普通的砷化镓光电导开关，具有结构简单、性能可靠的优点。

The results of experiment indicate that the films have the characteristic as the persistent photoconductivity effect .

实验结果表明，所制备的多晶硅薄膜具有类稳恒光电导效应，而且薄膜的稳恒光电导特性依赖于薄膜的晶化率和晶粒尺寸，随晶化率的增加和晶粒尺寸的增大而增大。

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。