分辨率

The main contents are as follows:(1) Based on Fresnel transformation and its fast algorithm by FFT, the principle of numerical reconstruction of digital lensless Fourier transform hologram and the spatial resolution, as well as the lateral resolution of the reconstructed images plane are elaborated.

其主要内容包括：(1)从处理衍射问题的菲涅耳变换法出发，根据菲涅耳衍射积分的快速数值解法，讨论了数字无透镜傅里叶变换全息图数值再现的相关过程和理论，以及再现像平面的空间分辨率和横向分辨率问题。

It shows that the lensless Fourier transform digital hologram can be reconstructed at any distance by Fresnel transform algorithm. For convolution algorithm,the whole reconstructed image with high resolution can be acquired in an optimal reconstruction range or a small area around it.

结果表明：利用菲涅耳变换算法对离轴无透镜傅里叶变换数字全息进行重建时，无重建距离的限制；采用卷积重建法只能在最佳再现距离附近一个非常小的范围内才能获得高分辨率再现像；而采用角谱重建法在略小于最佳再现距离及大于最佳再现距离较大范围内重建，均能获得高分辨率的再现像。

Based on lots of achievements of predecessors, directed by reservoir sedimentology, high-resolution sequence stratigraphy and petroleum geology, taking full advantage of loggin, core and thin section data from different wells, this paper has taken detailed study on the Upper Paleozoic strata in Tabamiao area.

本论文在众多前人研究成果的基础上，以储层沉积学，及高分辨率层序地层学、石油地质学等理论为指导，充分利用测井、钻井岩芯、薄片鉴定等资料，针对塔巴庙地区上古生界沉积相及沉积微相类型与展布，高分辨率层序地层特征与层序—岩相古地理演化，成岩作用类型与序列，孔隙类型与特征，以及储层物性特征与分布规律等方面展开了系统深入研究，最后对有利区带进行了预测。

Sensor: 32km targeting range, 4 locked targets, 580mm scan resolution, 11 magnetometric sensor strength, 42m signature radius

感应器：最大锁定范围32公里，最大目标锁定数 4，扫描分辨率580mm，磁力计感应强度11点，信号半径42m（现为：最大目标锁定数 5，扫描分辨率590mm

Based on this idea, the author has chosen two typical loess sections of Luochuan, and Xifeng for this study, collected the successive loess columns; To probe the conditional experiments of BeO sample preparation and measurement, and improve the existing method; On the basis of the technology improvement, the author has finished 402 samples' BeO preparation and AMS measurement; Also at the same time, to separate quartz from samples at 1 cm interval for both Luochuan and Xifeng sections systematically, to carry out measurements of quartz grain-size, SUS, grey scale, carbonate content and bulk sample density; By using the grain size model, the author has set up the chronological framework for both Luochuan, and Xifeng sections and the time sequence of millennial scale abrupt climate events recorded in loess strata, and reconstructed the East Asian monsoon history over 130ka by using multi proxies; Finally, to discuss the possible mechanisms of palaeoclimatic changes tentatively.

详细地球科学的发展离不开高精度和高分辨率的研究。运用长寿命核素如〓Be作为环境过程的示踪，已成为不可替代的有效工具。本论文选择洛川、西峰两个典型的黄土剖面，连续采集柱状样；探索了BeO样品制备、测量的条件实验，改进了原有的方法，完成了402个BeO样品的制备和AMS测量；同时还系统地分离洛川、西峰剖面高分辨率（1cm）黄土、古土壤样品中的碎屑石英，测量了碎屑石英粒度，以及全样的磁化率、灰度、碳酸盐含量和容重等古气候代用指标；采用粒度年代模式建立了洛川剖面和西峰剖面的年代标尺，建立了黄土地层记录的千年尺度的气候突变事件的时间序列，多指标重建了最近130ka东亚季风变迁史；初步讨论了古气候变迁的可能机制。

In the paper, it introduced some key technology application the importance of high spatial resolution RS imagery in the digital city. The new methods of the image fusion were illustrated with the Quick Bird image and photographical image, the results and were discussed and analyzed. Some unique and innovation were produced. The research's conclusion was some direction meaning.

本文介绍了数字城市和高空间分辨率擦的遥感影像在推动数字城市中的重大作用，以美国的Quick Bird卫星高空间分辨率的图像和航空彩色图像融合为例，并对实验结果进行的讨论和分析；文中提出了快速更新地物的独特性和创新性对科学研究和生产实践具有一定的研究价值和实际的指导意义。

Aimed at Wigner-Ville transformation crossterms badly interfering signals' resolution in the time-frequency analysis, the improved smoothed Wigner-Ville transformation is employed to analyze the time-|frequency characteristics of the Ricker wavelet synthesis record.

针对 Wigner-Ville变换中交叉项对信号时频分析的分辨率有较大的干扰，采用改进了的平滑Wigner-Ville变换处理技术，来分析雷克子波合成记录的时频特征，能够提高时频分析在时间和频率上的分辨率。

This paper introduces eight methods of tlme-frequency analysis, such as Hilbert transform, Hilbert-Huang transform, sine curve fitting, Ricker wavelet matching, short time Fourier transform, wavelet transform, S transform and Cohen methods, This paper explains the merits and defects of those methods from the time resolution, frequency resolution and the adaptive ability of multi-frequency signals.

本文介绍了Hilbert变换、Hilbert—Huang变换、正弦曲线拟合、雷克子波匹配、短时傅立叶变换、小波变换、S变换以及Cohen娄这八种方法，并从时间分辨率、频率分辨率，以及对多频率成份信号适应能力等各方面阐述了各种方法的优缺点，对其中的一些方法结合了理论记录进行了试算，进一步阐述了这些方法的长处和不足之处。

This paper introduces eight methods of time-frequency analysis,such as Hilbert transform,Hilbert-Huang transform, sine curve fitting ,Ricker wavelet matching,short time Fourier transform,wavelet .

本文介绍了Hilbert变换、Hilbert-Huang变换、正弦曲线拟合、雷克子波匹配、短时傅立叶变换、小波变换、S变换以及Cohen类这八种方法，并从时间分辨率、频率分辨率，以及对多频率成份信号适应能力等各方面阐述了各种方法的优缺点，对其中的一些方法结合了理论记录进行了试算，进一步阐述了这些方法的长处和不足之处。

It is necessary and important for spatial information technology to be applied in the field of flood prevention and disasters decrease. However, MODerate-resolution Imaging Spectroradiometer is not widely used in this field.

MODIS 是当今世界新一代&图谱合一&的光学遥感仪器，它具有中等空间分辨率、高时间分辨率、可免费接收等独特优势，在实时地球观测和灾害监测中有较大的实用价值。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。