基于校园一卡通的门禁道红外线识别方法研究

为实现对校园一卡通门禁道红外线主动识别,提出基于红外成像特征检测的校园一卡通门禁道红外线识别方法,建立门禁道红外线识别的成像模型。采用主动边缘轮廓检测方法进行门禁道红外线的特征提取,采用Harris角点检测方法对校园一卡通门禁道红外图像的特征点进行检测。结合相邻帧像素融合的方法进行红外图像的信息融合,采用目标主动检测方法进行门禁信息的特征检测和提取,构建校园一卡通门禁道红外图像的模糊特征检测和信息跟踪融合识别模型,实现校园一卡通的门禁道红外线识别优化。仿真结果表明,采用该方法进行校园一卡通的门禁道红外线识别的特征分辨能力较好,识别精度较高。     

稻谷中Bar基因PCR测定方法的研究

本研究以稻谷中转Bar外源基因片断为检测对象,应用PCR法建立稻谷中转Bar基因稻谷成分的定性检测方法。分别设计内参基因(SPS)引物和外源基因(Bar)引物,应用PCR法对稻谷中Bar基因进行定性检测。实验结果分析可知本研究采用的检测方法对阳性样品和阴性样品的检测具有可靠性,可以作为检测稻谷中转Bar基因的定性检测方法。     

罗汉果种属特征视觉检测与信息库的建立

利用自行研制的罗汉果图像识别系统对野生罗汉果品种以及组培罗汉果品种的果实图像进行处理计算,获得各个品种的长、宽、伸长度、周长、面积、圆形度、紧凑度、红、绿、蓝、色调、饱和度等外观特征参数,进而建立一个罗汉果品种的特征信息库,有助于对野生罗汉果品种进行保护以及明确其特征特性的分类界限,为检测提供阈值选择参考,是机器视觉检测和识别罗汉果品种的基础。     

异构多认知无线网络共存场景下的网络识别算法

针对传统的能量检测方法不能识别信号类型以及基于单一特征的循环平稳特征检测方法的识别准确率较低等问题,提出一种融合物理层信号特征和介质访问控制(MAC)层协议特征的网络识别算法.其中,利用滑动窗口能量检测来识别MAC层协议特征,同时,利用正交频分复用符号进行快速傅里叶变换的点数和循环前缀因子的循环平稳特征进行特定时延的渐近最优卡方检测来识别物理层信号特征.仿真结果表明,所提出的网络识别算法能够有效识别基于IEEE 802.22、IEEE802.11af、IEEE802.16h和ECMA392标准的异构多认知无线网络.     

基于多特征融合的疲劳驾驶状态识别方法研究

针对交通安全中疲劳驾驶状态识别问题，使用单一的疲劳驾驶特征的方法识别率较低，本文提出一种基于面部多特征加权和的疲劳识别方法.通过人眼状态检测算法提取眼部疲劳参数，即持续闭眼时间、闭眼帧数比、眨眼频率，通过打哈欠状态检测得到打哈欠次数和打哈欠持续时间，通过头部运动状态分析得到点头频率，建立融合以上六个特征的驾驶疲劳状态检测模型来评估驾驶员的疲劳等级并进行相应的预警.实验测试数据选自NTHU驾驶员疲劳检测视频数据集的部分数据.经实验调整后，发现该方法的识别准确率较高，识别效果好.     

干燥工艺对稻谷发芽率影响的研究

利用薄层干燥试验台，采用二次回归正交组合设计试验对辽宁省稻谷主要品种942进行研究。分析了热风温度、表现风速、初始水分、干燥时间对稻谷发芽率损失影响的规律，建立了稻谷发芽率损失回归方程，在干燥时应采用低温干燥，以保证其发芽率。利用贡献率法确定各因素在二次非线性模型中的主次关系为热风温度、初始水分、表现风速、干燥时间，为进行辽宁省稻谷深床干燥研究提供了理论依据。     

基于电子舌技术的不同品种大米区分识别研究

采用法国Alpha公司生产的Astree电子舌对四种不同品种大米进行区分识别研究,系统研究了大米样品经过不同预处理方法后的区分识别效果、研究味觉传感器优化前后大米样品区分效果、研究应用PCA、DFA两种模式识别方法区分识别效果;结果表明,大米经简单预处理后,电子舌能有效区分、识别出不同品种的大米。在大米品质检测方面,电子舌应用是一个新的检测方法,有着广阔的发展空间。     

嵌入式网络攻击特征的有效识别方法研究

嵌入式网络的开放性和自组网性特点导致网络容易受到攻击,影响网络安全,且传统的攻击特征检测识别方法难以对其进行有效检测。提出一种基于攻击特征调频信号建模的嵌入式网络攻击识别方法。进行嵌入式网络攻击信号模型设计,采用线性调频信号检测方法实现对网络攻击特征的识别和检测,考虑时域和频域之间映射值,对攻击检测的虚警门限进行预估,实现网络攻击特征识别算法改进。仿真结果表明,采用该算法能有效实现对嵌入式网络攻击特征的识别,在低信噪比环境下提高对网络攻击特征的检测性能。准确检测概率较高。     

基于多传感器融合的越野环境路面信息识别

为实现精准的越野环境路面信息识别，文中提出了一种基于多传感器信息融合的路面信息识别方法.首先，针对车辆簧下振动加速度信号设计了特征提取算法，通过双线性池化方法融合加速度特征与图像+深度特征，以实现对越野路面类型的多维度特征融合与识别.然后，为提高越野路面可通行区域检测效果，引入迁移学习方法，将越野场景路面类型识别模型中路面特征提取的共性知识向通行区域分割模型进行迁移.在真实越野环境数据集下对模型进行训练与测试，测试结果表明文中提出的识别方法不仅在越野场景路面类型识别任务上获得了98.65%的平均分类准确率，而且引入先验知识可明显提升通行区域检测效果.     

钢丝绳缺陷定量识别的贝叶斯建模方法

提出了跳变系统检测的贝叶斯建模方法，针对钢丝绳检测信号特征，设计了断丝定量识别的多重假设检测方法，可以在线监测钢丝绳状态。     

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