查询词典 optical

An optical packet exchanger is provided which, in a situation where a transmission path for an optical packet is to be switched by using an address signal, prevents the transmittable capacity for the information signal from being decreased, and which facilitates the extraction of the address signal even if the modulation speed for the information signal becomes high.

提供了一光分组交换器，在一种情况下通过使用一地址信号来交换光分组的传输路径，防止信息信号的可发送容量降低，并且即使在信息信号的调制速度变高时，也便于提取地址信号。

On the basis of introducing the channel and system model of wireless optical communication,average bit error rate of uncoded and RS coded system with channel side information were analyzed,and compared with Turbo coded system from the following two aspects:received optical power and Log-amplitude fluctuation variance.

在介绍无线光通信信道及系统模型的基础上，推导了无线光通信未编码系统和RS编码系统在已知信道边信息条件下的平均误码率，从接收光功率和对数振幅起伏方差方面对RS码编码系统和Turbo编码系统的性能进行比较。

Compared with uncoded system, the Turbo-coded optical wireless system improves the performance of optical wireless link because Turbo code compensates losses and noises of link and improves jamming-rejection ca...

比较了基于Turbo码的大气无线光通信系统与未编码大气无线光通信系统，发现Turbo码技术能够很好地补偿和克服各种衰减和噪声，提高了系统的抗干扰能力，使系统的性能得到了很大的提高。

Optical bistability and Optical multistability behaviour of ladder-type four-level atom in a undirectional ring cavity driven by three laser fields is studied.

主要研究了在一单向环形腔内的级联型四能级原子被三个光场驱动的光学双稳态和多稳态行为。

A total of 101 honey samples that originated from 20 different unifloral honey and other multifloral honey samples were collected from China. FT-NIR spectrometer were applied to determinate the content of fructose and glucose of honey with two different modes: transflectance (800-2500 nm, 2 mm optical path length) and transmittance (800-1370 nm, 20 mm optical path length).

采集了来自全国20种单植物源和其它多植物源的101份的蜂蜜样品，分别运用傅立叶型近红外光谱仪采用光纤透反射（800~2500nm，2mm光程）和透射（800~1370nm，20mm光程）采集方式获得近红外光谱，来预测蜂蜜中结构和含量都很相近的果糖和葡萄糖含量。

Lianghe turpentine relative density, refractive index, initial boiling point, distillation range size, optical activity and chemical composition as well as the softening point, acid value, unsaponifiable matter content, ethanol insoluble matter, ash, optical activity and chemical composition and other physical and chemical characteristics of rosin gum were studied.

研究梁河脂松节油的相对密度、折光率、初馏点、馏程体积、旋光度和化学组成以及脂松香的软化点、酸值、不皂化物含量、乙醇不溶物、灰分、旋光度和化学组成等物理和化学特征。

The electronic structures and the non-linear optical properties of bis schiff base and their derivatives have been studied using FF/HF method.The effects of electron donor/acceptor on nonlinear optical property were examined at the molecular level.As a result,the NLO coefficients of the substituted compounds are all larger than the unsubstituted compound.Among them, the β value of compound 4 is the largest one.

自1961年激光发现以来，非线性光学和非线性光学材料迅速发展起来[1～4]，随着光通讯、光电子学和光信息处理等在实际中的应用，对非线性光学材料的理论与实验研究进一步展开，寻找和设计具有较大非线性光学系数，超快光学响应，较低的光学损伤阈值，良好的化学稳定性和热稳定性的非线性光学材料成为这一领域的主题[5～12]。

There are two defferent design of hardware: optical fiber temperature sensor is used for middle-voltage Metal-clad switchgear, which data is transferred by optical fiber; another one is 1-Wire Digital Thermometer, it is used for lower-voltage Metal-clad switchgear, and the data is transferred by unwired.

硬件方面设计了两种不同的温度传感系统：中压开关柜过热故障监测采用光纤式温度传感器，同时采用光纤传输数据；低压开关柜采用单总线数字式温度传感器，数据采用无线传输。

In order to decrease total optical length, a design scheme was employed by selecting mechanically compensated zoom lens with a negative compensator, shortening the focus length of variator and compensator, and increasing the distance between front group and variator. An initial configuration was obtained by solving equations of aberrations. According to aberration theory, the aberrations were corrected by using ZEMAX optical design software.

为缩短筒长，采用负组补偿偏离物像交换变焦结构，缩短变倍补偿系统各组元焦距，增加前固定组和变倍组间距的设计方案，通过解初级像差方程求得初始结构，依据像差理论，利用ZEMAX自动设计软件进行像差校正平衡。

The basic principle of Faraday effect of magneto-optical glass and the main index affected the Verdet constant and the recent progresses in research of magneto-optical glass containing much rare earth are introduced.

综述了磁光玻璃法拉第效应的基本原理、影响维尔德系数的主要因素以及含稀土磁光玻璃的研究进展。

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。