混沌神经网络住宅性能综合评价模型的研究

住宅性能综合评价是住宅商品化和市场化的重要基础性工作．利用人工神经网络模拟人脑学习和记忆功能的特点，建立了住宅性能综合评价模型．针对神经网络BP算法收敛速度慢容易陷入局部极小值问题，将混沌理论引入神经网络算法中，利用混沌运动的遍历特性加快了训练速度，使其收敛于全局最优解．算例表明，混沌神经网络模型可以准确地评价住宅的综合性能，有良好的应用前景．     

基于Seesaw门的双向联想记忆神经网络

人工神经网络是一种模拟大脑结构及功能的信息处理系统,在模式识别、生物医学等领域成功解决了许多棘手的实际问题,然而在纳米级中如何实现DNA分子的“智能思考”及自主的“大脑行为”仍是一个难以解决的问题.文章将DNA链置换与双向联想记忆神经网络(BAM)结合在一起,通过级联具有反馈效应的Seesaw门搭建了两个BAM神经网络,以此来展示如何在纳米尺度上用DNA分子完成类似大脑的自主异联想功能.这两个BAM神经网络可以通过动态反馈的过程最终达到稳定状态,分别实现了三原色的加减色原理以及简单字符的联想记忆,表明DNA分子可以自主完成灌输式学习神经网络的工作过程.     

人工神经网络的理论、应用与实现研究

人工神经网络的理论、应用与实现研究李平岳祖州（山东大学光电子信息工程系济南２５０１００）人工神经网络是模拟动物和人脑的工作方式以实现大脑的某些功能的信息科学；它具有信息分布存储、高速并行处理、自学习功能和容错性等特点，近年来引起了广泛的重视。在模拟大...     

混沌神经网络住宅性能综合评价模型的研究

住宅性能综合评价是住宅商品化和市场化的重要基础性工作.利用人工神经网络模拟人脑学习和记忆功能的特点,建立了住宅性能综合评价模型.针对神经网络BP算法收敛速度慢容易陷入局部极小值问题,将混沌理论引入神经网络算法中,利用混沌运动的遍历特性加快了训练速度,使其收敛于全局最优解.算例表明,混沌神经网络模型可以准确地评价住宅的综合性能,有良好的应用前景.     

血管性痴呆模型大鼠学习记忆障碍的实验研究

目的:研究拟人类血管性痴呆(vascular dementia,VD)模型大鼠学习记忆功能的改变.方法:(1)采用改良的大脑中动脉栓塞(middle cerebral artery occlusion,MCAO)法,建立VD样学习记忆障碍的大鼠模型.实验动物随机分成3组:VD模型组、假造模实验对照组和正常对照组.(2)采用水迷宫行为学试验,观测各组大鼠的空间学习记忆功能.结果:VD模型大鼠发生了空间学习记忆功能障碍,与两对照组比较有显著性差异(P<0.01).结论:(1)本研究制成的VD样学习记忆障碍的动物模型具有较好的仿真脑性痴呆的特点.(2)水迷宫试验能较真实地反映动物学习记忆功能.     

小波神经网络研究进展及展望

关于步波分析与人工神经网络结合的研究,近些年来已成为信号处理学科的热点之一,已有大量的研究成果见诸各种学术刊物和会议论文。小波变换具有良好的时频局部性质,神经网络则有自学习功能和良好的容错能力,小波神经网络（ＷＮＮ）由于较好地结合了两者的优点而具有强大的优势。作者较系统地综述了小波神经网络的研究进展,讨论了小波神经网络的主要模型和算法,并就其存在的一些问题,应用与发展趋势进行了探讨。     

神经网络在公路交通中的应用──汽车转向仿真

结合人工智能的最新方向──人工神经网络，利用ＢＰ网络的联想、记忆功能，建立了具有神经网络的驾驶员─环境闭环控制系统模型；研制了闭环控制系统仿真软件，对几种典型转向情况进行了模拟，并进行了汽车转向试验，结果表明：闭环系统模型合理，仿真结果准确。     

具有认知判别功能的自联想记忆神经网络模型

提出一种具有认判别功能的自联想记忆神经网络模型，对一个新的输入模式，当网络达到平衡点时，通过一种差别函数可差别该模式是否是网络中已存贮的模式，如不是则对其进行学习；如是则该平衡状态即为其联想结果，给出了模型及其学习规则，分析了网络吸引子半径与有关参数的关系及模型对输入模式的筛选作用，最后给出了计算结果。     

神经网络在项目财务评价上的应用

利用人工神经网络BP算法建立项目财务评价模型,用模糊数学的隶属函数描述评价指标.由隶属函数的峰值和均值组成学习样本训练神经网络,使之具有联想记忆功能,对未在训练中出现的待评价的样本指标也能作出决策,实现项目的财务评价.     

人工神经网络及其在金属预报中的应用

讨论了人工神经网络在金融汇率预报中的应用。其中介绍了广义交互验证（Generalized Cross Validation）法如何应用于确定神经网络中隐层的个数，并用实例说明了该方法甚至对复杂的非线性函数也可以得到很好的逼近。详细地介绍了运用人工神经网络作现两周向前汇率预报的计算步骤。其平均相对误差（APE）为10＊E－3的数量级，而国际上通用的状态空间模型及Box-Jen-kins的ARMIMA模型的预报误差都在10＊E－2的数量级。     

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.     

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     

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