测定相似材料模型实验数据的数码照相方法

针对现有的相似材料模型实验位移观测方法的局限性,采用普通数码照相方法进行模型测点的位移观测.在每个测点周围布设独立的控制格网并进行单点数码照相,在常规数字成图软件中对数码照片进行图像处理,获取控制格网角点和测点标志的图像坐标,通过坐标变换和影像畸变纠正后,解算出各测点在独立控制格网中的实际坐标.实例应用表明,该方法简便实用,测定位移精度高且可靠,可在模型实验中推广应用.     

改进的主动形状模型在植物叶形分类中的应用

针对植物叶形识别的特点,采用改进的主动形状模型实现叶片图像的批量识别和分类.在模型中以地标点序列表示对象形状轮廓,分别应用覆盖面积半径和生物学参照点进行伸缩变换和旋转变换,归一化地标点序列间的统计关系,进而研究形状间的相似性和差异性;在分类时通过设置相似度阈值,强化了同类叶片的标准,从而减少了一些非同类的误归入事件的发生.实验表明改进的主动形状模型在叶形识别中得到稳健的识别率.     

移动单目相机下基于单应的动态手势轨迹识别

针对单目相机的移动会造成图像坐标系的全局运动,对手势识别中运动轨迹的观测产生影响,不能满足手势交互的应用需要的问题,建立并证明了一种基于单应的目标运动轨迹观测模型.该模型通过分析目标平面运动时相邻帧之间的射影关系,利用单应矩阵求解与特征点的重投影,求得相邻帧之间的目标相对运动矢量,得到世界坐标系下的目标运动轨迹.为验证该模型的有效性,基于该模型提出了一种利用移动相机进行动态手势轨迹识别的方法.实验结果表明:使用该方法进行动态手势轨迹识别的识别率为89%,处理速度达到72.28帧/s,在移动相机环境下保证了手势识别系统的识别率与实时性.     

一种基于全景视觉系统的Robocop机器人定位方法

对全景视觉成像原理进行了讨论,提出了一种基于YUV色彩空间的多阈值图像分割和利用三角定位原理实现的机器人定位方法.通过识别全景视觉图像中坐标已知的特征信标,提取信标特征,进而应用几何原理计算出机器人的空间坐标,实现机器人的定位,为机器人导航和蔽障工作奠定了基础,有效地减少了彩色图像分割的计算量,避免了全景视觉图像柱面展开所带来的误差.通过实验证明,本方法能够较精确地实现机器人的定位.     

大角度透视变形集装箱图像箱号识别方法

针对存在大角度透视变形的集装箱图像,提出一种新的集装箱箱号识别方法.首先对图像进行透视变换校正,然后利用深度卷积神经网络模型定位并识别出集装箱图像中的26个大写英文字母和10个阿拉伯数字,最后利用集装箱箱号的先验知识,通过级联决策规则从候选字符集中识别出集装箱箱号.此方法应用于重庆港集装箱1 035张实景图像,箱号识别精度达97%,基于NVIDIA GeForce GTX1080图形处理器加速的箱号识别速度为每秒2～5帧.     

基于Android智能手机的GNSS定位精度和准度分析

为更准确定位Android终端(GNSS:Global Navigation Satellite System)定位精度,使手机更好地在泛测绘场景应用,选取两个典型测点,通过48 h连续观测并采用GAMIT/GLOBK软件解算获得测点"真实"坐标.使用两款智能手机采集全球导航卫星系统原始观测数据,进行静态和动态定位精度和准确度对比实验.结果 表明,三星Galaxy S8定位结果普遍优于华为P10;静态后处理,LGO(Leica Geo Office)解算结果好于RTKLIB解算结果;动态实时解,三星Galaxy S8实现固定解且具有较好的准度(优于1dm);华为PI0的结果较差,准度在3.18 ～5.52 m之间,精度在2.67～4.88 m之间,且未实现固定解.     

正己烷在Ni/HM催化剂上的异构化反应动力学模型

利用高压微反色谱装置 ,在温度 4 83.15～ 5 2 3.15K、压力 1.0～ 3.0MPa、氢油比 10～ 4 0、重时空速 0 .5～2 .5h-1的条件下 ,对正己烷在Ni/HM催化剂上的临氢异构化动力学进行了实验研究 ,并考察了总压、空速、温度、氢油比等因素对正己烷异构化反应速率的影响。结果表明 ,正己烷临氢异构化反应为拟一级反应 ,其表观活化能为(10 0± 1.5 )kJ/mol。用Langmuir Hinshelwood方法建立了正己烷异构化双位反应动力学模型 ,该模型的计算值与实验结果吻合较好     

基于GIS技术和FEFLOW的秦王川盆地南部地下水数值模拟

在系统分析研究区地质及水文地质条件的基础上,确定了研究区范围和边界条件,借助GIS技术和FEFLOW建立了研究区地下水系统概念模型和数学模型及相应的地下水系统数值模型.用2004-2005年地下水动态观测井的地下水动态观测资料对数值模型进行了识别和率定,运用识别后的模型对现状水平年(2004年)的地下水系统进行了模拟与分析.结果表明:建立的模型能够较好地反应研究区水文地质空间分布及组合方式,具有一定的代表性,可以用于数值模拟计算.选择2005年为预测初始时间,2015年为终止时间,利用模型对研究区进行预测.在模型运行10年后,研究区北部区域地下水位上升3～5 m,中部区域的上升5～10 m,南部区域的上升10～15 m.分析模拟区域地下水上升范围,为今后实施排水措施奠定了一定的技术基础,也为排水措施的选址提供了一定的依据.     

藏文图像文本识别在安卓系统中的应用 ——基于混合注意力机制神经网络模型

针对藏文图像文本识别在Android系统上的应用问题,提出了一种基于混合注意力机制神经网络模型(CBAM-LeNet-5)的藏文图像文本识别方法,并采用Android平台研发了APP,实现印刷体藏文文本图像预处理、字丁分割以及识别等功能.经实验,改进后的网络模型比传统的LeNet-5模型识别率提高了2.36个百分点,表...     

基于隐Markov模型的图像方位识别

提出一种基于隐Markov模型(Hidden Markov Model,HMM)的图像方位识别方法.将待识别的目标图像进行分割,对子图像进行奇异值分解,提取奇异值向量形成观测序列,即图像奇异值向量作为HMM的观测向量.确定HMM参数并计算其最大似然概率,按待识别图像最大似然概率对应所属的聚类进行识别.实验结果表明,3类共150幅目标图像的识别率达到了85%.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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