基于增强现实和神经网络的校园展示应用设计

当前的校园展示多采用虚拟现实开发,该技术让用户完全沉浸入虚拟世界,但忽略了现实世界的信息。增强现实技术能够在真实世界的基础上叠加虚拟信息,进一步增强人们的感知体验。基于Unity3D+ARCore+Tensor Flow设计了带平面检测、多图像和物体识别功能的增强现实应用,详细描述了虚拟对象、触屏交互、平面检测、图片和物体识别的实现过程和注意问题,说明了在脚本和UI设计中的性能优化方法。测试表明多标识物识别提升了应用的实用性,物体识别功能丰富了应用内涵,增加了校园展示的设计方法,拓展了增强现实技术的应用范围。     

增强现实技术在数字化资源中的设计研究

增强现实技术是现代化的一种先进技术,将其应用在设计数字资源中,可以发挥良好的使用效果。基于此,该文就主要围绕增强现实技术进行分析,研究这一技术的概念和发展的意义,探究增强现实技术的数字化资源设计,以及增强现实技术在实现数字化资源设计方面的应用,旨在发挥技术的应用功能,提高其应用效果。     

多特征融合的深度强化学习色彩增强方法

提出一种结合深度特征与美学特征的图像增强方法.首先,结合多种图像特征重构智能体评估网络,该网络通过拼接图像语义特征、图像色彩特征及历史动作信息输出当前策略.其次,感知奖励模型通过预训练分类模型激活层网络提取深层特征,使用余弦距离获得图像间的深度感知距离;利用美学模型获得图像间的概率距离.最后,结合两方面的距离表示并将其用于奖励模型构造中.在MIT-Adobe FiveK数据集上的实验结果表明,本色彩增强方法在结构相似度和平均均方误差上优于其他基线算法,模型场景适用性强.生成图像在保留更多的细节信息的同时,可以有效增强图像色彩.     

物联网在配电设备巡查及状态监测中的应用

阐述了物联网及智能电网的定义,以及物联网在配电设备的巡检及状态监控中的应用,以配电设备的巡检、状态监测为研究背景,采用射频技术采集配电设备信息,手持终端对巡检人员跟踪,手动录入配电设备信息,通过物联网的信息应用层对设备状态评估,提出了感知层、数据应用层、信息应用层的体系架构。     

基于对抗样本的深度学习图像压缩感知方法

压缩感知是研究数据采样压缩与重构的信号处理新理论,近年来研究人员将深度学习运用到图像压缩感知算法中,显著提高了图像重构质量.然而,图像信息常与隐私关联,高质量的重构图像在方便人们观赏的同时,带来了隐私保护的问题.本文基于深度学习理论,提出一种对抗的图像压缩感知方法.该方法将压缩理论和对抗样本技术统一于同一个压缩感知算法,通过设计损失函数,联合重构误差和分类误差来训练压缩感知深度神经网络,使得压缩感知重构样本同时也是一个对抗样本.因此,重构图像在保证重构质量的同时,也能对抗图像分类算法,降低其识别率,达到保护图像隐私的效果.在Cifar-10和MNIST图像集上进行的实验结果表明,和已有的压缩感知方法相比,我们提出的对抗压缩感知方法以损失仅10%的图像重构质量为代价,使得图像分类精度下降了74%,获得了很好的对抗性能.     

融合显示红外在线监测系统的研究

图像融合是信息融合领域的一个热点．图像融合的目的是把来自多传感器数据的互补信息合并，形成一幅新的图像，以便更好地增强监视和侦察之类的视觉感知．红外在线监测以远距离、非接触、实时、快速等方式获取设备的运行状态信息，进而及时地排除故障．本文提出了基于融合显示的红外在线监测系统组成方案，描述了图像融合的基本概念、层次以及应用价值；其次，通过分析红外图像与可见光图像融合的特点，并据此给出本实验融合方法的选择原则；最后，讨论了基于小波变换实现图像融合的原理并给出红外热像和可见光图像的融合效果；通过模拟实验，证明了图像融合技术在热故障的准确定位上有很高的实用价值。     

基于压缩感知的图像重构关键技术研究

图像在信息领域应用的重要性使人们对快速成像技术提出了更高需求,压缩感知理论为图像处理提供了一种新途径。本文研究了压缩感知理论应用于图像重构的关键技术,重点分析对比了各种因素对重构图像质量的影响。实验结果表明:通过小波变换基对信号稀疏,以哈达玛矩阵作为测量矩阵,使用正交匹配追踪算法时仅需50%的采样率即可获得较高质量的图像,有效减少了传统方法中冗余数据过多问题,在重构图像视觉效果和PSNR值上均有所提高,同时提高了恢复效率。本研究为应用压缩感知寻求最优化图像恢复方法在理论和技术上提供了有力依据和支撑。     

基于RFID技术的消防设备管理系统设计

随着RFID技术的日渐成熟飞速发展,物联网技术在智慧城市的应用越来越受到关注。本文针对现有的消防设备不具备智能感知功能,统计分析困难,数据难以交互,形成信息孤岛的实际问题;通过在消防设备上张贴RFID电子标签,使设备具备感知;通过扫描相关设备达到自动采集自动识别;通过WIFI／GPRS技术实现数据无线传输,基于web技术远程管理数据;并结合消防设备日常巡检、维护、监管等任务特点,设计开发了一套基于RFID的消防设备智能管理系统,是物联网技术在消防领域的创新性研究及应用。     

基于AR的互动式3D电子书的研发与实现

增强现实(Augmented Reality,AR)电子书是在传统纸质书籍的基础上,将计算机处理过的虚拟信息叠加在真实场景上,并借助感知和显示设备,将虚实信息融为一体,在显示静态模型的同时播放声音,从而显示虚拟三维景象的电子图书。本文阐述了使用ARTool Kit开发包和Open GL进行3D电子书的开发过程,在完成基本功能的同时改变模型加载方式,扩展了标识图的单一识别功能,展现了一个多样化的增强现实的发展和应用。系统使用不同的建模软件建立模型,并进行渲染加载,完成声音展示,使其更加生动贴近现实,提高了阅读者的阅读兴趣。该互动式3D电子书弥补了传统图书的不足,体现了增强现实电子书的独特优势,是增强现实在教育领域的一种有益应用,具有极大的市场价值和科研价值。     

水下非均匀光照场景下的混凝土图像增强方法

检测水下基础设施混凝土表观缺陷是保障水下基础设施安全稳定运行的重要措施。使用遥控水下机器人(remote operated vehicle,ROV)采集混凝土表观图像是当前水下检测最高效的方式，然而ROV采集到的混凝土图像存在光照不均、色彩失衡、对比度差和边缘信息弱等问题。该文针对水下混凝土图像质量不佳的问题，提出了水下非均匀光照场景下的混凝土图像增强方法。首先采用图像修复技术(image inpainting technique,IIT)对图像局部高光区域进行修复；然后在暗通道图像增强方法的基础上引入图像对比度感知调节方法，选取不同窗口尺寸，在每个局部窗口区域中实现图像增强；最后采用自然图像质量评估、基于感知的图像质量评估、无参照物图像质量评估和水下彩色图像质量评估4个指标对增强后的图像进行评估。实验结果表明：该文提出的方法在多个对比指标中优于现有水下图像增强方法，能有效提升水下图像质量。     

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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