The aim of the study is to provide stimuli for writing concise and coherent abstracts imaging the original article without loss of critical substance and clarity. 该研究的目的是为书写简明且连贯的摘要提供刺激,呈像原创文章而不丢失关键主旨和清晰性。
Optimization of Positive-Negative Phase Objects in 4/ Coherent Imaging System for Nonlinear Refraction Index Measurements 测量三阶非线性折射率的4f相位相干成像技术中正负相位物体的优化
Principle and Technical Difficulties of Laser Coherent Imaging Radar 激光雷达相干成像原理及其研究的若干问题
Binary grating illumination was investigated in detail by using partial coherent imaging theory. 采用部分相干成象理论对二元光栅照明进行了较为详细的研究。
However, because of the coherent imaging mechanism, which determining the noise of image is mainly multiply noise. As to the multiply noise, we must convert the multiply noise to additional noise through logarithm transform. 但是,合成孔径雷达的成像机理是相干成像,这种机理决定了图像的噪声必然是以乘性噪声为主,对于乘性噪声的处理需要先给图像做对数变换以得到加性噪声模型。
Phase stability of SAR signal is essential to image azimuth resolution of coherent imaging processing. 雷达(SAR)信号相位的稳定性对于成像处理后图像的方位向分辨率的高低有至关重要的影响。
In order to provide a theoretical base for high resolution optical coherent imaging, the interference of laser beam transmitting in the turbulent atmosphere for a certain distance is studied. 通过研究激光在湍流大气中的传输情况,旨在为光学高分辨率干涉成像提供理论依据。
The shaping processing for the coherent imaging local beam is carried out by means of the conjugate grating synthetic technique, thus the detector array can be suited and the synthetic output can meet the optimal signal noise ratio conditions. 采用共轭光栅合成技术对相干成象本振光束作整形处理,以适应探测器阵列及合成输出满足最佳信噪比条件。
Also described is the principle of this method for reducing the coherent optical background noise in the coherent imaging system. 叙述了在相干成象系统中降低背景噪声方法的工作原理;
SAR is a coherent imaging system, so SAR images contain lots of speckle noise. SAR是一种相干成像系统,因此所成图像含有大量的相干斑噪声。
An Experimental Investigation on Spray Processes Using Coherent Imaging Method for Particle Sizing 喷雾过程的相干影象法研究
A fractional Fourier filtering model for an imaging system is established on the basis of partially coherent imaging and fractional Fourier transform theory and a corresponding fractional-Fourier domain preset-phase iteration ( FrPi) algorithm that can quickly design fractional domain phase filters is proposed. 基于部分相干成像和分数傅里叶变换理论,建立成像系统的分数傅里叶域滤波模型,提出了可快速设计分数域位相型滤波片的FrPI算法。
In the past 20 years, the imaging technique of ultrasound imaging equipment has made much progress in harmonic imaging, coherent imaging, Doppler imaging and frequency spectra analysis. 近20年来,超声成像设备在电脑超声成像技术,谐波成像技术,相干处理成像技术,多普勒频移成像技术,回波频谱分析技术等方面取得了重大进展。
Working principles of CO 2 laser coherent imaging radar were introduced. Key technologies of CO_2 laser coherent imaging radar were analyzed. Application perspectives of it in precision guidance were commented. 概述了CO2激光相干成像雷达的特点,介绍了它的基本工作原理、技术关键及在精确制导中的应用前景,分析了CO2激光相干成像雷达在精确制导中最有发展前途的两个应用领域。
Simulation of Pulsed Coherent Imaging Laser Radar for Moving Target 脉冲相干激光雷达对运动目标成像模拟
The development course and operation principle of CO2 laser coherent imaging radar is discussed, the application in the navigation of the cruising missile and the terminal guidance of tactics ballistic missile is discussed. 论述了CO2激光相干成像雷达发展历程及工作原理,讨论了该雷达系统在巡航导弹导航以及战术弹道导弹末制导中的应用。
The X-ray coherent scatter imaging with the clinical X-ray imaging equipments was investigated. 对临床X射线成像设备的X射线相干散射成像进行了研究。
Application of CO_2 Laser Coherent Imaging Radar in the Navigation of the Cruising Missile and the terminal Guidance of Tactics Ballistic Missile CO2激光相干成像雷达在巡航导弹导航及战术弹道导弹末制导中的应用
The criterion of determing particle size with laser coherent imaging 激光微粒影象的粒径判读准则
CO_2 Laser Coherent Imaging Radar and Its Application Perspectives in Precision Guidance CO2激光相干成像雷达及其在精确制导中的应用前景
In this paper, the principle of X-ray coherent scatter imaging and some examples applied in medicine are introduced. 本文概述了X射线相干散射成像技术的原理和在医学中的应用。
The analysis and simulation indicate the optical synthetic aperture technology by coherent imaging can improve the resolution dramatically compared with traditional single-aperture telescope. It is valuable for realization of lightweight and modularity of space-based optical remote sensing system. 分析和仿真结果表明:光学综合孔径通过相干成像不但可以突破传统单孔径系统的口径局限获得极高的成像分辨率,而且对于实现空间光学遥感系统轻量化和模块化都具有重要意义。
New Filtering Approach on Partial Coherent Imaging System for Improving Photolithography Resolution 部分相干分数域滤波改善光刻分辨率新方法
On the basis of considering the modules of laser radar equation, SNR and AGC, imaging demand, noise and imaging proces, we make a simulation of pulsed coherent imaging laser radar for moving target. 针对运动目标,在考虑激光雷达方程、信噪比和自动增益、成像指标、噪声、图像处理等模块的基础上,对脉冲相干成像激光雷达进行了运动目标的成像模拟。
However, because of its coherent imaging principle, the speckle phenomenon strongly hinders data interpretation with standard image analysis tools. 然而由于SAR系统的相干成像原理,相干斑大大影响了通用图像处理工具的处理效果。
Because of the characteristic of the coherent imaging process, ultrasound images suffer from a low signal-to-noise ratio that brings unfavorable effects into the quantitative analysis and diagnosis. 由于超声成像的相干特性,超声图像的信噪比低,给定量分析和诊断带来了不利影响。
To enhance the recognition capability of the radar system, this thesis proposed the 3-D coherent imaging method and achieved 3-D imaging for the targets behind the wall. 为进一步提高雷达系统对目标的识别能力,本文提出了UWB-TWDR的三维相干成像方法,以实现对墙后目标物体的三维成像,在成像结果中显示出目标的高度。
The partial coherent imaging theory used in lithographic system with the exposure and development theories in resist was academically summarized, and the peculiarities of several SLMs for lithography were studied in detail. 研究内容包括:1.系统地阐述和总结部分相干成像和抗蚀剂曝光显影理论,针对用于无掩模光刻的几种空间光调制器的特点进行了深入细致地研究。
However, SAR images product much speckle inevitably due to the coherent imaging system. 但是由于SAR成像过程中的相干特性,使得SAR图像不可避免地产生了相干斑噪声。
Synthetic aperture radar based on coherent imaging principle is a high-resolution imaging system. Owing to the unique advantage, it is widely used in military and civilian areas. 合成孔径雷达是一种基于相干成像原理的高分辨率成像雷达,由于具有独特优势,被广泛应用于军事民用领域。