用遗传-禁忌搜索混合算法求解组合投资问题

提出了一种基于遗传算法和禁忌搜索的混合算法,用遗传算法提供并行搜索的主框架,用禁忌搜索作为遗传算法的变异算子.遗传算法中变异过程解空间的搜索由禁忌搜索实现,并且用混合算法求解了概率准则意义下的组合证券投资模型.实例证明,遗传/禁忌混合算法有较强的爬山能力,较遗传算法有更高的计算效率,为组合证券投资者提供了一种高效的决策方法.     

智能搜索算法

用Borland C++Builder实现动态深度优先搜索,在判断目标方位、选择最短路径方面提高了平面搜索的智能。     

智能搜索算法

用Borland C Builder实现动态深度优先搜索，在判断目标方位、选择最短路径方面提高了平面搜索的智能。     

搜索引擎新闻组织模式浅析

新闻一直是门户网站主要的竞争内容,而现在新闻竞争已经不仅仅是门户之见的事,搜索引擎在新闻搜索领域的竞争,也越来越激烈。文章分析了搜索引擎的新闻组织模式出现的背景、特点及其应用,从另一个角度介绍了信息资源开发组织的方法。     

深层网网络爬虫表单检测器设计

传统网络爬虫只处理页面中的超链接,而忽略了大量有价值的深层网搜索表单。本文设计了一个表单检测器用于检测搜索表单,介绍了其功能模块及具体实现,最后用实验验证该检测器的有效性。     

一种新闻类WORD格式文件数据抽取算法研究

为了对新闻类信息进行搜索和数据分析,需要从大量保存新闻类信息的WORD文件中进行信息检索．使用人工直接检索WORD文件的方式效率较低,因此,考虑从WORD文件中抽取有用信息来构建新闻信息数据库,然后在数据库中进行数据搜索和新闻数据处理．提出一种新闻类WORD格式文件数据抽取算法,使用该算法从批量新闻类WORD文件中高效自动读取文件内容,清洗无用数据,并抽取有用信息数据构建数据库．     

一种用于视频编码的块运动估计新算法

提出了一种连续排除的像素子抽样轮换(SASE)块运动估计新算法,用四分之一子抽样模式轮换法实现对参考区域的全搜索．实验表明具有和穷尽式块匹配相近的效果,而搜索的计算量只有穷尽式搜索的四分之一同时在每一个子块的计算过程中,利用图像帧间不等式进行连续位置排除,进一步有效地减小了搜索计算量,提高了搜索效率．     

浅谈矩形地面搜索区域搜索路径的优化方案

在矩形地面搜索区域中,搜索问题转化为Hamilton回路问题,制定出的＂S＂形搜索路线及搜索路线中180°折回处搜索盲区的搜索修正方案,使整个搜索区域实现完全覆盖。通过合理安排搜索路线,避免了复杂的计算,实现了搜索方案的顺利实施。     

基于Tika语义分析的文档内容检索服务研究

介绍了利用Lucene结合Tika实现站点内容的全文检索设计的编程过程。用Tika获取文档的元数据以及文档内容的文本提取。用Lucene实现文档的索引创建和检索服务,结合实例详细分析了Lucene API的具体使用特点。利用Spring MVC实现搜索服务的Web访问处理。可对网站的HTML、PDF、word、PPT、mht等各种类型的文档提供统一的内容检索服务。在该论文研究基础上可建立个性化的内容搜索服务系统。     

博弈树启发搜索算法在五子棋游戏中的应用研究

博弈是启发式搜索的一个重要应用领域,博弈的过程可以用一棵博弈搜索树表示,通过对博弈树进行搜索求取问题的解,搜索策略常采用α-β剪枝技术。在深入研究α-β剪枝技术的基础上,结合五子棋游戏特征,设计了五成/双三、估值函数和α-β剪枝算法相结合的改进博弈树搜索算法,实现了人机智能对弈的五子棋游戏。     

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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