本文讨论了弱光反馈对相干光差分相移键控系统误码率的影响。
The effects of weak optical feedback (WOF) on the bit error rate (BER) of coherent optical differential phase shift key-controll (DPSK) systems are presented.
利用激光激发声表面波及光差分技术研究激光源对声表面波的影响。
A laser generation and optical difference detection method of surface acoustic waves (SAW) is used to study the influence of laser source on SAW.
利用激光激发声表面波及改进的光差分检测技术，研究沉积在基片表面的薄膜样品的特性和参量。
A laser generation and modified optical difference detection method of SAW for studying the characters of thin films deposited on substrates is introduced.
天然食用色素的优点在于其安全性，缺点是其稳定性差，易受光、热、空气和金属离子的影响而变色或褪色。
The natural food pigments are safe, while their stabilities are bad. They are easy to change their color or fade when they are exposed to light, heat, air and metallic ions.
为了解决传统电传操纵系统抗电磁干扰能力差、带宽低等问题，提出了飞行控制系统光传方案。
A fly-by-light flight control system was developed to replace the fly-by-wire system which is susceptible to electromagnetic interference and has low bandwidth.
实验测得的延时与相邻子阵对应的光载波的波长差以及光延迟线的长度线性相关，这与理论分析一致。
The measured time delay responses are nearly linear with the wavelength spacing between optical carriers as well as the lengths of FDLs, which agrees well with the theoretical analysis.
介绍了利用双光路差分吸收光谱(DOAS)技术监测大气气溶胶并反演其粒谱分布的新方法。
With the method of differential optical absorption spectroscopy (DOAS), aerosol along the light path is monitored and its size distribution is measured with double optical path method.
为提高计算效率，采用了多重网格法、当地时间步长和残差光顺等加速收敛措施。
Residual smoothing, local time stepping and a new multi-grid scheme were employed to improve calculative efficiency and accelerate the convergence.
它主要由二次谐波产生、和频产生、差频产生、光参量振荡等构成。
It mainly consists of harmonic generation, sum-frequency generation, difference-frequency generation, optical parametric oscillation and etc.
本文研究了背景相减算法、差分法、基于光流场的运动估计和基于主动形状模型的目标跟踪算法。
In the thesis, the algorithm of background subtracting, frame difference algorithm, motion estimation based on optical flow field and object tracking based on active shape contour are investigated.
本差分构型光路简单，容易实现样品池和参考池的定位与调整。
This configuration of the optical system is simple , and, the adjustment of the sample and the reference cell is achieved easily.
介绍了计算加速方法，包括隐式残差光顺和全多重网格方法；
Then, the accelerating computational methods including implicit residual smoothing and full multigrid strategy were presented.
根据波导间相互耦合与自映像原理，采用时域有限差分法分析了该器件的光传输特性。
The optical propagation properties of the device have been demonstrated by finite difference time domain method according to the waveguides directional coupling and self-imaging principle.
基于有限差分光束传播法，对侧边抛磨光纤的光传输特性进行了模拟计算。
Based on beam propagation method, analysis and simulation on optical propagation characteristics of side-polished fiber have been made.
混合集成光学加速度计是一种实用型的实时加速度传感器，在信号处理过程中采用了光相位调制和交流相位跟踪零差补偿技术(PTAC)。
The hybrid integrated optical accelerometer is a kind of practical accelerometer, which adopts optical phase modulation and alternating current phase tracking and homodyne compensation scheme (PTAC).
由于电信号传输系统保密性和抗干扰能力差，为此，利用声光晶体的衍射效应研制了一种光信号自由空间传输系统。
To resolve this problem, a free space transmission system for optical signals is developed on base of diffraction effect of acoustooptic crystal.
本文报道了空间差分光调制反射光谱，指出了它与常规光调制反射谱的区别。
In this article, we report another form of photoreflectance spectroscopy-space differential photoreflectance (SDPR) spectroscopy.
用时域有限差分法研究了同一材质的颗粒在不同填充密度下的随机介质中光局域化问题。
The problem of light localization in two-dimensional random media with different filling densities of the same material particles is studied by use of the finite difference time domain method.
目的研究任意多态叠加多模叠加态光场的广义非线性等幂次差压缩特性，从理论上导出该光场呈现高次差压缩的条件。
Aim To find out the squeezing conditions theoretically and the properties of equal-power nonlinear difference squeezing in multimode radiation field with any amount of states superposing studied.
由于传统的前照灯配光设计停留在二维的层面上，设计周期长，且配光效果差，很难达到防眩目的要求。
The traditional ray′s distribution design based on 2 dimensions needs long period and is hard to meet anti-dazzling requirement.
在光弹性贴片法中，通常利用剪应力差法和斜射法来分离主应变。
In the photoelastic coating methods, the shear stress difference and slant incident approaches are often used to divide the main strains.
但由于光的穿透能力差，该方法主要应用于人体表面浅层肿瘤的治疗，对深部和中晚期肿瘤的治疗具有一定的困难。
Because of the weak penetration of light, Photodynamic Therapy was used mostly to treat tumors located in human skins, but not those in deeper part of human bodies.
但是有机光伏材料的溶解性差、对光的吸收效率低，制约了其在太阳能电池中的应用。
However, poor solubility and low light absorption efficiency of organic photovoltaic materials limit the applications in solar cells.
针对近红外五甲川菁染料光稳定性差的问题，设计合成系列水溶性方酸菁染料，其中两个不对称染料结构未见报道。
Focus on the poor photostability of pentamethine cyanine dyes, a series of water-soluble squarylium cyanine dyes were synthesized, including two novel asymmetric dyes.
另外，本文还利用时域有限差分法分析了光刻胶层内部的光场分布。
In addition, the distribution of light fields in the photoresist layer is analyzed by finite-difference time-domain method.
本文提出一种新型中频差双频激光器——磁致旋光-塞曼双频激光器。
The dual-frequency laser as a light source takes a key element in the interferometer.
然后用时域有限差分法（FDTD）数值计算了锥形光纤光场分布，论述了在不同的包层半径处，光纤锥的光场分布特性。
Optical field in tapered optical fiber is numerically simulated using 2D finite-difference time-domain (FDTD) method, optical character in different cladding radius is expounded.
提出基于光弹调制器式反射差分技术的多通道并行测量新方案，完成一台双通道并行测量样机。
A new multi-wavelength parallel measurement method is proposed and a two-wavelength spectrometer for PEM-based-RDS is developed.
提出基于光弹调制器式反射差分技术的多通道并行测量新方案，完成一台双通道并行测量样机。
A new multi-wavelength parallel measurement method is proposed and a two-wavelength spectrometer for PEM-based-RDS is developed.
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