BGI注入式种子填充算法及实现

区域填充问题在ＣＡＤ、科学可视化、图形图象处理等领域均有着广泛和深入的应用，研究高效的区域填充算法，是计算机图形学的重要问题之一。多边形填充算法只适用于多边形区域的填充，边界填充算法虽然对区域边界形状无严格要求，但要求区域边界颜色特征一致。为此，提出一个注入式区域填充算法，对于内点定义的区域，不要求边界颜色特征一致，在此基础上，对ＴｕｒｂｏＣ和ＢｏｒｌａｎｄＣ＋＋的图形库函数进行了扩充。该算法及其实现给相关图形的处理带来了极大的方便     

基于边界标注的单连通区域扫描线填充新方法

提出一种基于边界标注的单连通区域扫描线填充快速算法。在计算中先对目标边界进行标注，根据标注形成的标准进行判断，之后再用扫描线进行填充。对比传统单连通区域扫描线填充法。新方法算法效率高，实现简单，对复杂区域的填充同样适用。     

一种新的区域奇偶校验填充算法

描述了一个新的区域奇偶校验填充算法.该算法按行扫描方式,利用差分技术提取扫描线上区域边界的内外端点,并确定相应直线段是否属于边界区域的内部段,再以划线方式填充,从而克服了奇偶校验法不能直接应用于粗边界区域和离散分布的多边界区域的填充缺点.     

圆柱和半平面域拓扑积的Hiblert边值问题

讨论了圆柱和半平面域拓扑积的Hiblert边值问题，建立了这个区域的B－调和函数的边界条件，和解析函数的Schwarz积分公式，进而讨论这个区域Hiblert边值问题可解性的条件和解的表达式。     

全纯函数的Riemann—Hilbert边值问题

讨论了多圆柱区域上边界仅为Ｈｏｅｌｄｅｒ连续函数时的全纯函数的Ｒｉｅｍａｎｎ－Ｈｉｌｂｅｒｔ边值问题。借助于多复变函数的理论，给出了上述边值问题可解的充要条件及较完整的解的表达式。     

复杂多边形的填充算法

概述区域填充中两两类常用算法－－扫描转换和种子填充和基本思想及其性能。结合两类算法的设计思想，给出了一个复杂多边形的填充算法，并用ＴＵＲＢＯ ＰＡＳＣＡＬ加以实现。     

基于Snake模型与轮廓跟踪的区域填充算法

针对图像中外形复杂的孔洞填充问题,提出一种基于Snake模型与轮廓跟踪的区域填充算法对复杂孔洞进行填充。首先,对二值图像进行检测求出内部边界的像素点,并对其坐标进行保存。其次,通过轮廓跟踪法求取每个轮廓边界的所包含的像素位置。再次,通过将这些边界作为Snake模型的初始曲线,在其内力和外力的指导下,填充内部孔洞。最后,利用Snake模型与轮廓跟踪删除边界外存在的多余部分。通过MATLAB实验本文提出的算法,证明可以填充外形复杂的多孔区域,提高了填充精度。     

一种基于链队列的种子填充法

在此提出两种对递归种子填充算法的改进算法，在该算法中使用链队列而不是递归，而且采用先填充后入队列，减少了很多不必要的操作，使得改进后的算法无论是时间还是空间效率都远远优于递归种子填充算法，而且也可以填充任意大小、任意复杂边界的区域。     

256色模式下图形图像处理系统中对不规则区域的处理

概述了图形图像处理系统中关于不规则区域的基本算法，包括：区域填充，边界跟踪，边界标志，几何处理，区域分割等等，并用，根据２５６色模式的特殊性，对传统的算法做了有针对性的改进，加快了处理速度，使其更适合于电影电视字幕，动画卡通人物等不规则图形图像区域。同时还给出了改进算法的程序设计的技巧。     

基于边界检测和骨骼提取的显著性检测网络

目前一些方法通过多任务联合实现显著性检测，在一定程度上提升了检测精度，但仍存在误检和漏检问题，其原因在于各任务优化目标不同且特征域差异较大，导致网络对显著性、物体边界等特征辨识能力不足．基于此，借助边界检测和骨骼提取提出一种多任务辅助的显著性检测网络，其包括特征提取子网络、边界检测子网络、骨骼提取子网络以及显著性填充子网络．其中，特征提取子网络利用ResNet101预训练模型提取图像的多尺度特征；边界检测子网络选择前3层特征进行融合，可完整保留显著性目标的边界信息；骨骼提取子网络选择后两层特征进行融合，可准确定位显著性目标的中心位置；所提方法基于边界检测数据集和骨骼提取数据集分别对两个子网络进行训练，保留最好的边界检测模型和骨骼提取模型，作为预训练模型辅助显著性检测任务．为降低网络优化目标与特征域之间的差异，设计了显著性填充子网络将提取的边界特征和骨骼特征进行融合和非线性映射．在4种数据集上的实验结果表明，所提方法能有效恢复缺失的显著性区域，优于其他显著性目标检测方法．     

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.     

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.     

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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