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Modern approach methods of geography, ecology, quantitative analysis, expert integration, remote sensing image analysis and geographical information system were combined to reveal the matters in this paper. The eco-geographical background of the research area and the research work studied by other scholars were comprehensively expatiated. The temporal and spatial variation of precipitation and soil moisture, vegetation and soil distribution, and land use/land cover were compared as well. On the basis of foregoing analysis, the eco-geographical differentiation was discussed. According to principles and indicators, with extension engineering method and integrated analysis, the physical geography boundary between subhumid and semiarid areas were demarcated. By using remote sensing image analysis, wavelet analysis of the perennial precipitation and temperature, and the comparison of temporal and spatial variation of the desertification, this paper accounted for the regional response to global environmental change and suggested the dominant environmental problems.

本文采用了地理学与生态学相结合、定量分析与专家集成相结合、遥感图像解译和地理信息系统相结合的方法，对研究区的生态地理背景和已有研究工作进展情况给予了全面的分析和阐述；通过对区域水分条件（大气降水、土壤水分条件）、植被、土壤、土地利用／土地覆被状况等环境要素的时间与空间特征的对比分析，探讨了研究区内部生态地理特征的差异；在一定的原则指导下，通过建立指标体系，以可拓工程方法和模型为支撑，经过综合分析确定了研究区内半湿润、半干旱区界线划分方案；通过遥感图像解译、典型站点多年降水与温度的小波分析、土地沙漠化时空变化的对比分析等，说明了研究区域对全球变化的响应；表明了该区域所面临的主要环境问题。

On the contrary, as the car runs fast, we couldn't get stable background image, and we can get only one picture as it pass by the tollbooth in order to satisfy the request of real time processing. We proposed the method of differencing image in one frame to get the moving edge.

将一帧图像的两场作为不同时刻的图像，作前后帧减影，得到运动边缘，为了克服图像中的水平边缘分割为运动边缘的问题，我们提出了一种局部门限的方案，取得了很好的运动边缘分割效果。

Then it made denoising and edge detection for the CT image of the brain aiming at the properties and keystoned of CT image. In the process of denosing for CT images of the brain,because it has some characteristics,such as the biomedical signal is a typical non-stationary signal with a strong noise in background,it is more difficult to resolution.

在对脑部CT图像的去噪处理过程中，本文针对生物医学信号是典型的非平稳信号，具有很强的背景噪声，处理起来较困难的特点，引入了一种基于EMD方法的脑部CT图像去噪方法，它可以有效地去除噪声的干扰，充分保留信号的局部特征。

It developed for military affairs first in Occident .It utilizes the characteristic of NUV spectrum (240-280nm) that UV spectrum of object is much greater than that of solar radialization in the aerosphere. Double spectrums imaging system gets UV and visible images to identify the object and background. Image infusion is a essential step of succedent image processing.

它利用中紫外区的&日盲&(240—280nm的中紫外)特性，即目标发出的紫外线远远强于太阳的紫外辐射，通过双光谱图像检测系统观察和检测该波段的紫外目标信号与背景可见光图像，并利用图像配准与融合技术，把紫外光图像准确地定位于背景图像，形成合成图像达到检测目的。

The experimental results show that the algorithm can well differentiate and segmentate detail of the cell image,and applys to the image that unconspicuous between background and objects and being some yawp.

实验结果表明，该算法对细胞图像细节有很好的区分和分割，适用于背景与目标对比不是很明显并具有一定噪声的图像。

This algorithm uses HSV colour space which is more compatible with human's visual sense feature and takes advantage of human's perception feature on colour to quantise colour components in non equal interval and to form the eigenvector. Then it uses histogram intersection distance algorithm to match pieces' feature, and according to the characteristic of stitching pieces of image its own, the image segmentation technique is adopted to cull the background of the piece, and simultaneously the approach to match the pieces by direction is implemented.

算法采用符合人类视觉特性的HSV颜色空间，利用人对颜色的感知特性对颜色分量进行非等间隔的量化并形成特征矢量，应用直方图相交距离进行了特征的匹配，并且针对拼块图像自身的特点采用了图像分割技术对拼块图像的背景进行剔除的同时实现了按方向进行匹配的方法。

This paper show you target center and cirques can be eliminated from target image little by little because of the high image background contrast, and the results of shooting therefore can be determined.

本文针对靶图像背景颜色对比度大的特点，采用逐步处理分离的方法，将靶中心和靶环从背景中分割出来，提取弹点坐标，进而判定打靶环数。

Image data from the Swift detectors, normally intended to follow cosmic gamma-ray bursts, were recorded on January 28. The data are combined here, along with a sky survey image of background stars, to show optical and ultraviolet light in green-blue hues and x-rays from the comet in red.

通常用来追踪珈玛射线爆发事件的雨燕号卫星，在1月28日转向鹿林彗星，而所取得的数据再和巡天摄影的背景星场结合，并用绿-蓝色泽及红色来呈现彗星的可见光、紫外光和X射线辐射。

PartⅡ. Dickinsons Letters from John Chinaman(also titled Letters from a Chinese official: beingan eastern view of western civilization) depicted the image of China superior to the occidentalworld in religion, social system, civilian life, art and aesthetics by contrasting Chinese andoccidental civilization. The author made use of the image of China as background to criticize Britishsociety, point out the obvious problems and latent crisis, refute the sayings in the Occident whichregarded China as yellow peril, an uncivilized nation.

第二部分。狄金逊的《约翰中国佬》(又名《中国官员来信：对西方文明的看法》)通过中西文化、文明对比的方式，塑造了在思想信仰、社会制度、民众生活、艺术审美等方面均优越于西方的乌托邦式的中国形象，以此来批判英国社会、揭示其存在的危机和弊端。

Both the theoretical analysis and experimental results validate that the proposed Laplacian construction approach can better capture the intrinsic structure between image pixels, and can propagate the finer ingredients of an image foreground and background rather than just their labels, and thus the mattes of higher quality are obtained.

理论分析与实验结果均证实，所构造的Laplacian 能够更充分地表达图像像素间的内在结构，能以更精细的方式约束传播前、背景的成分比例而不仅仅是标号，从而获得更优的景物提取效果。

So it was last week in Selma , alabama.

上星期在亚拉巴马州塞尔马市发生的事件也是这样一个转折点。

The group also spearheads various social programs in China.

该组织还带头参与中国的各种社会活动。