一种基于边缘知识的雷达图像匹配定位算法

针对低信噪比实孔径雷达图像的特点，选用适于提取多尺度稳定边缘的Ｃａｎｎｙ算子，结合具有视觉非线性的门限准则、Ｎｅｖａｔｉａ细化和跟踪准则及Ｈｏｕｇｈ变换，提取可靠稳定的边缘特征描述，根据可见光参考图提取与ＳＡＲ图像共性的稳定边缘特征的知识以及稳定边缘的知识描述，提出一种基于边缘知识的雷达图像与可见光图像匹配定位算法，实验结果表明，该算法能可靠地完成雷达图像的匹配定位。     

基于区域知识的快速匹配定位算法

针对雷达图像与可见光图像间仅存在大尺度的共性区域特征这一特点，提出了采用区域分割技术获取雷达图像和可见光图像中的各区域特征，结合各区域知识及各区域间的关系，通过识别与雷达图像中的大尺度区域相对应的可见光图像中的区域，达到快速匹配定位的要求．     

基于区域知识的快速匹配定位算法

针对雷达图像与可见光图像间仅存大尺度的共性区域特征这一特点提出了采用区域分割技术获取雷达图像和可见光图像中的各区域特征，结合各区域知识及各区域间的关系，通过识别与雷达图像中的大尺度区域相对应的可见光图像中的区域，达到快速匹配定位的要求。     

基于边缘方向的直线提取算法

研究一种快速的图像直线提取算法.将边缘按方向划分成若干子边缘,利用判据从子边缘提取出局部直线,然后依据准则合并相应子边缘直线得到全局直线及参数.准确提取出图像中的直线特征及端点和方向等参数.仿真实验结果表明,该算法比Hough变换能更准确、快速、可靠地提取图像的直线特征.     

基于平行直线组的可见光与红外图像配准算法

为实现可见光与红外图像配准,方便维修人员辨识电路板红外图像中的器件,提出一种新型的基于平行线组的可见光与红外图像的自动配准算法。首先,使用Canny算法提取图像边缘,并使用8邻域链码对其进行编码;然后,利用Freeman准则进行直线检测并提取平行线组;最后,利用图像中的平行线经仿射变换后仍为平行线的约束特性,将直线配准转换为点配准,利用鲁棒点匹配算法实现平行线间的配准。实验表明,当2幅配准图像中包含丰富的平行线时,算法能够充分利用图像中平行线在仿射变换时的平行约束性,实现可见光与红外图像的快速自动配准,且算法具有较好配准精度。     

航空图像中线状目标的自动识别

本文构造了一个航空图像中线状目标的自动识别系统，其中包括低层目标的细化边缘提取，中层目标中心链的特征表达和高层的目标识别定位。整个过程充分利用人类关于线状目标的知识，提出了一系列针对线状目标特征的识别算法，解决了高噪声航拍图片中线状目标的边缘提取及边缘提取不连续所带来的识别难题，并用可靠的实验结果证明了系统的有效性和普适性。     

微零件图像亚像素边缘定位算法

为快速而精确地检测微零件图像边缘,提出了一种新的图像亚像素边缘定位算法.此算法与常用亚像素边缘定位算法区别在于不需要进行边缘初定位,而直接提取亚像素边缘点.应用一种新的图像坐标排序方法,使无规律的边缘点能够按照一定时针顺序链接成闭合曲线.以微齿轮图像作为实验对象测试了算法的精度与速度,结果表明该算法在边缘定位精度满足亚像素的情况下,能够快速提取边缘曲线,处理时间不超过1s.     

X光胸片中肋骨信息自动提取算法及实现

在分析X光胸片图像及肋骨特点的基础上，提出了符合医学规范的肋骨信息自动提取步骤及相应算法．此算法充分利用图像中值滤波、边缘提取、种子跟踪、抛物线拟合等相关的一些图像处理技术，并结合X光胸片中肋骨线的生物学特点，最终实现了图像处理技术在一个具体实例中的成功应用．将该算法应用于具体实例——肺结核病灶自动定位，取得较好的定位速度和准确度．     

基于Prewitt算子的计算机数字图像边缘检测改进算法

为了使提取的图像边缘的结构定位精确，并产生连续的精细边缘，同时能滤除边缘信息中的噪声干扰，提出了一种以Prewitt算子为基础，应用区域分割和骨架提取的改进算法，实现了图像边缘信息的提取，能消除图像中的噪声，产生精细的边缘。实验证日月，该算法能有效地消除噪声，准确地检测图像中的目标边缘，且能较好地保持目标边缘的连通性。     

基于先验知识和形态学膨胀的车牌定位算法

提出了一种基于先验知识和形态学膨胀的车牌定位算法,该算法首先提取图像的垂直边缘,然后利用形态学膨胀算法得到车牌候选区域,最后根据先验知识定位车牌区域,测试表明该算法在交通卡口场景中可有效定位车牌,定位准确率达97%。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that