In order to study the relationship between optical signal and cutting quality,an on-line monitoring system with cut front radiation as the criterion for laser cutting was built up.
为了研究激光切割过程光信号与切割质量的关系,搭建了以切割前沿光辐射作为检测参量的实时检测系统,对切割前沿光辐射的时、频域信号进行了试验研究,得到了不同参数下光信号的变化规律。
These methods were high-speed camera and optical signal monitoring.
利用高速摄像及光信号监测两种手段对等离子体的动态变化过程及其对焊接稳定性的影响进行了深入的研究。
The test methods of the burst-mode optical signal in the PON system were studied.
针对GPON系统以其大带宽和高效率,越来越成为光纤宽带接入网的首选方案的现状,对PON系统的突发光信号测试方法进行了研究,通过分析PON系统的突发光信号特点,指出了目前测试技术中存在的一些问题,提出了突发光信号误码测试与光功率测试的具体设计方案。
Researching on OSNR Monitoring Technique Based on Polarization-Nulling Method;
偏振分光法光信噪比监测技术研究
Analysis of OSNR and system design of optical ring network;
光环形网的光信噪比分析与系统设计
The OSNR calculating of DWDM system using cascade EDFAs;
DWDM系统中级联EDFA光信噪比计算
The working mode and noise in fluorescent signals detecting circui2ts by using photodiode were analyzed in this paper.
对采用光电二极管的荧光信号接收电路的工作模式和噪声进行了分析,论述了输入失调和暗电流的补偿方法,深入讨论了防泄漏措施、输入管脚的“护卫”、隔离技术和输入管脚的悬置引出技术、PCB板的清洁和隔离涂敷、屏蔽和滤波等技术。
The necessity of processing optical information for traditional X ray device has been stated,and the methods used to realize digital image has been outlined.
叙述了对X线胃肠机的光信息进行处理的必要性和X线胃肠机的图像数字化方法概况。
A look into the 21st century indicates,with the development of optical information society and the broad application of Photon technology,it will have a great impact on human life.
展望21世纪,随着以光信息为代表的信息化社会的发展,人类将迈进光子时代,光子学的发展和光子技术的广泛应用将对人类生活产生巨大影响。
In this paper,we have briefly introduced the status of optical information and photonics technology lab of Tianjin Polytechnic University,and comprehensively introduced the goal,the plan and the content of construction during the period of "11th Five-Year".
本文简要介绍了天津工业大学光信息与光电子技术实验室的现状,并对实验室在"十一五"期间的建设思路与目标以及建设内容等进行了全面的介绍。
Analyzing the wavelet denoising of electrophoresis fluorescence signals for DNA sequencing;
DNA测序电泳荧光信号的小波去噪分析
Fluorescence signals in DNA sequencing are often contaminated by noise,which has negative influence on the accuracy and detection limit of analysis.
为了真实构建噪声模型并准确评价去噪算法的有效性,实验中通过实际系统中采集到的噪声信号叠加理想荧光信号构建DNA测序仿真信号,去噪分析的结果表明:选择sym7小波基函数、分解层数(lev=5)与使用固定格式软阈值,有效去除了DNA测序信号的噪声;处理后,信号的信噪比提高了5倍以上。
The Study of Improve the S/N of Capillary Electrophoresis Fluorescence Signal;
为了提高前期研制的共聚焦式激光诱导荧光检测系统的分辨率,增强输出荧光信号的信噪比,本文从荧光信号采集电路的优化和数学消噪处理两方面,对提高共聚焦式激光诱导荧光检测系统的灵敏度和信噪比进行研究。
The veracity of conventional optical signal to noise ratio(OSNR) monitoring technique based on polarization property is easily affected by the polarization mode dispersion and nonlinear polarization scattering.
传统偏振方法监测光信噪比的准确性易受偏振模色散和非线性双折射影响,提出了一种新的偏振正交外差监测方法以克服传统偏振监测方法的缺点。
The laser signal combined with a closed - loop control system can be used in automatic level flatting of the ground.
自准水平激光仪的激光信号与闭环控制系统的结合,实现地面的水平平整,它是自准水平激光仪的一种动态应用。
Laser signal is affected by the scintillation in the course of atmospheric transmission,thus the performances of the laser detecting system are unstable In this paper,the effect of atmospheric scintillation to laser signal detection is roughly estimated and calculated The corresponding changes of signal detection are also demonstrate
文中对大气信道中大气闪烁效应对激光信号检测的影响作了初步的分析和计算，并给出了在一定大气湍流条件下激光检测相应的变化。