超宽带ISAR超分辨成像的一种方法

首先建立CSM算法(相干信号的处理方法)模型,对超宽带信号聚焦后的数据协方差阵的表达式进行了推导;然后在详细介绍ESPRIT超分辨算法基础上,将该算法应用于CSM算法模型对超宽带逆合成孔径雷达进行成像;最后将CSM算法分别与TLS-ESPRIT算法和该文快速ESPRIT算法进行对比仿真实验,其结果证明了此超分辨算法的可行性和有效性。     

浅论在刑事案件细微特征检验照相中传统胶片的成像质量优于数码CCD、CMOS成像质量

由于数码相机性能的迅速提高和价格的不断降低，以及其突出的优点，目前在一般照相方面，已经大量推广，取代传统的照相胶片，但是在刑事照相方面，尤其是在拍摄细微痕迹时，还是不如传统照相胶片。传统照相胶片，尤其是反转片和黑白胶片在刑事照相时，能获得更高的感光度、解像力和清晰度，能为影像提供更丰富的细部层次和更真实的色调，对揭示刑事案件现场的微细痕迹效果更好。     

家庭数码影像完美解决方案

目前流行用数码相机和喷墨打印机搭配以制作数码照片,但是有些摄影爱好者,已经拥有质量很好的传统照相机,可以不购置数码相机也能够建立数码影像制作系统。为此,本文推荐一套家庭数码影像系统：爱普生Perfection2400photo扫描仪＋Stylus Photo打印机,实际应用效果很好,经济而实惠。     

Why older adults make more immediate treatment decisions about cancer than younger adults.

Literature relevant to medical decision making was reviewed, and a model was outlined for testing. Two studies examined whether older adults make more immediate decisions than younger adults about treatments for prostate or breast cancer in authentic scenarios. Findings clearly showed that older adults were more likely to make immediate decisions than younger adults. The research is important because it not only demonstrates the consistency of this age-related effect across disease domains, gender, ethnic groups, and prevalent education levels but begins to investigate a model to explain the effect. Major reasons for the effect focus on treatment knowledge, interest and engagement, and cognitive resources. Treatment knowledge, general cancer knowledge, interest, and cognitive resources relate to different ways of processing treatment information and preferences for immediate versus delayed decision making. Adults with high knowledge of treatments on a reliable test tended to make immediate treatment decisions, which supports the knowledge explanation. Adults with more cognitive resources and more interest tended to delay their treatment decisions. Little support was found for a cohort explanation for the relationship between age and preference for immediate medical decision making. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Embedded coding of medical images with regions of interest based on 3-D zerotree

In order to satisfy the need of diagnoses, based on the characteristic of medical images that a sequence of frames are formed in one body inspection, a new strategy for medical images compression is proposed. The 3-D wavelet is adopted and the planar zerotree is extended to the 3-D zerotree. By making use of the 3-D zerotree structure, a simple method for region of interest (ROI) mask generation is put forward. Medical images are compressed by three-dimensional embedded coding with the compression of regions of interest. Simulation results have shown that it can efficiently improve the compression ratio without affecting the diagnoses. Translated from Journal of Xidian University, 2006, 33(2): 182–185 [译自: 西安电子科技大学学报]     

Large aperture static interferential multispectral image compression with motion compensation and region of interest coding

To perform better on interferential multispectral image compression, wavelet transform based on motion compensation and region of interest coding and asymmetric zerotree was proposed. According to the movement in the images and the characters of spectrum, the motion compensation and raising coefficients of intensive interference area were used in this wavelet. In this way, the relativity among the spectra is reduced and the intensive interference area coefficients can be coded preferentially. The asymmetric zerotree was proposed due to the unsymmetrical structure of images formed by the wavelet. Experimental results show that with eightfold compression, this algorithm outperforms the three-dimensional set partitioning in hierarchical trees (3DSPIHT) in the range of 0.35–0.49 dB in power signal-to-noise ratio (PSNR) and outperforms the 2DSPIHT in the range of 2.24–2.62 dB in PSNR. Compared to joint picture expert group 2000 (JPEG2000) upscaling method, the effect of intensive interference area is also improved 0.29–0.38 dB in PSNR. Meanwhile, the average of mean square error of spectra within 46 spectrum bands is reduced to 9.69. Translated from Journal of Xi’an Jiaotong University, 2006, 40(4):449–453 [译自: 西安交通大学学报]     

星载SAR对舰船高分辨成像研究

研究了星载SAR对舰船高分辨成像的难度和方法。在星载SAR舰船数据获取模型的基础上，着重分析了舰船航行以及船体在特定海情时三维转动对星载SAR成像的影响，研究了星载SAR舰船数据的ISAR成像方法，并给出成像算法流程，仿真结果验证了该方法的有效性。     

积极发展中医事业更好地为人民健康服务

五千年来，中医为中华民族防病治病、养生保健、繁衍昌盛做出了巨大贡献。中医一系列的学术成就推动了人类医学的发展。现在中医防病治病能力加强、疗效提高，成为我国卫生工作中一支重要的、不可替代的力量。未来中西医团结合作，取长补短，优势互补，对提高医疗保健的效果和防病治病的能力，将会产生积极的作用和影响。     

摄像机标定方法综述

首先介绍了摄像机标定的基本原理以及对摄像机标定方法的分类。通过对最优化标定法、双平面标定法、两步法等传统摄像机方法的具体分析，给出了各种方法的优劣对比；同时对多种自标定方法的研究现状、发展情况以及存在问题进行了探讨。最后给出了发展传统摄像机标定方向、提高摄像机自标定精度的二些参考建议。