车载视频系统中字符叠加技术的应用

为解决车载视频系统中查看各种信息数据必须切换视频信号的问题。把字符叠加技术引入到车载视频系统中．通过对字符叠加(OSD On Screen Display)技术原理的分析，利用字符叠加芯片、视频信号处理芯片、存储芯片等设计出一种新型车载视频字符叠加系统．这种新型视频字符叠加系统可以将字符信息和动态的视频节目同时显示于电视屏幕上，实现了在汽车上观看视频节目的同时又可以查看许多必要的汽车行驶参数的功能．     

基于DM642的图像制导系统OSD实现

本文介绍了一套基于DM642的图像制导监控系统.该系统实现了视频图像的采集、处理和显示,采用纯软件编程的方式实现了OSD(On-Screen-Display)叠加,并利用DM642的多通道缓冲串口(McBSP)接收PC机上的数据实现不同叠加画面间的切换.本文实现的OSD算法简单,灵活性强,应用于其它领域时,只需修改相应的字库、图形函数即可.     

基于改进KPCA算法的车牌字符识别方法

针对核主元分析(KPCA)用于提取车牌字符特征不足的情况,提出了一种采用多组均值矢量来代替原始图像矢量进行核矩阵计算的方法,该方法使得核矩阵维数大幅降低,同时有效地保留了字符图像信息.实验结果表明,该方法在不降低识别精度的基础上对输入数据实现了有效的降维,大大缩短了计算时间,有效地满足了车牌实时识别系统技术要求.通过实验对比可知,该方法比目前常用的PCA及FLD算法具有更高的性能指标.     

采用大规模专用OSDC芯片的数字视频混合器研究

讨论了基于大规模OSDC(0n Screen Display Control)集成电路的数字视频混合器(Video Digital Mixer)的设计原理．数字视频混合器广泛应用于高速公路、治安卡口、十字路口等交通管理领域，对于自动化和智能管理有着重要的作用．现在普遍使用的数字视频混合器存在功能单一、无法显示彩色字符、采用低速的串行通信接口、字库容量小、没有时间日期显示、字符显示和视频信号无法同步等问题．所述的数字视频混合器实现了在输入的视频信号上叠加可自定义的字符或图符，通过PC机的PCI接口实现对字符显示的位置、字符的大小、字符的颜色等的控制．内置的时间、日期控制器可以协同控制单元实现平滑、无闪烁的时间和日期显示．采用带看门狗功能中央处理期能够保证系统的高度稳定，独特的双端口总线实现了对闪存的单向写入和双向读出。对所用到的主要集成芯片的功能和特点进行了说明．将采用大规模集成电路设计的数字视频混合器和以前使用中小规模集成电路设计的数字视频混合器进行了对比。得到了非常显的技术进步．     

基于卷积神经网络的字轮式仪表双半字符识别

针对远程自动抄表系统中字轮式表盘出现双半字符导致识别困难的问题,提出一种基于卷积神经网络(CNN)的双半字符识别方法。对采集到的表盘图像,首先通过图像预处理和投影算法分割出完整字符和双半字符。鉴于实际图像中双半字符样本较少,不足以训练深度网络,该方法通过收集相邻数字的完整字符图像进行对齐拼接,再从中随机截取子图像从而建立一个可用的双半字符训练集,并训练好专门设计的CNN模型。以燃气自动抄表系统读数为例,在生成的双半字符测试集和真实的双半字符测试集上进行实验,结果表明,与传统方法相比,本文方法有效提高了双半字符识别准确率。     

复杂背景下字符提取算法的分析与实现

为了在复杂背景下提取字符,采用了基于图像理论的降维算法和彩色游程算法,对复杂图像进行颜色聚类,通过阈值控制相近颜色的聚类,同时生成平均颜色的彩色游程信息,有效地合并了颜色种类,为字符区域的二值化奠定了良好的基础.实验结果表明,采用以上算法在复杂背景下提取字符,其识别率达到89%.     

一种七段数码管式医用仪表的自动识别方法

提出了计算机实现七段数码管式医用仪表自动读数的一种新方法.根据仪表数字显示区域图像中的字符特点,利用投影的方法进行字符区域的定位和单个字符的分割.利用穿线法进行数字字符识别,有效降低了误识率.实验结果表明,该方法识别效果好,快速简单,满足实时性要求,是一种高效的新方法.     

基于C8051F320单片机的心电监护系统设计

为推进现代心电监护向数字化、智能化发展,使心率精确显示,提出一种基于C8051F320单片机的心电监护系统.该系统采用放大滤波电路对ECG (Electrocardiograph)信号进行处理以实现心电信号的放大、噪声的消除等功能,并利用单片机控制LCD (Liquid Crystal Display)对其进行实时显示...     

一种新型视频图像压缩存储系统

为解决便携式图像设备中视频数据和附加信息的实时存取问题,研究了一种新型视频图像压缩存储系统.以高性能单片机为核心,分别控制屏显器件、视频编解码器件、压缩/解压缩器件、CF卡和CPLD视频控制器,实现了字符叠加、视频图像压缩存储以及回放等功能.视频总线采用8位ITU-R BT.656格式,由CPLD控制.该系统能与多种图像观测附加设备连接,将所获得的附加信息实时自动叠加在图像上.采用在应用编程(IAP)技术将用户参数直接存储在片上程序FLASH中,并可实时更新,省去了类似系统中必需的数据FLASH芯片.该系统已通过调试并在工业图像探测系统中得到了实际验证.     

基于DM6437的图像采集与VGA显示系统设计

以TMS320DM6437为主控芯片,讨论一种基于DSP/BIOS类/微型驱动模型的图像采集与视频图形阵列(VGA)显示系统设计方法.在类/微型驱动模型中将驱动模型分为与硬件无关(类驱动)和与硬件相关(微型驱动)的两层,应用程序通过调用类驱动来间接调用微型驱动函数,从而达到控制图像采集及VGA显示的目的.实验结果表明:系统可以很好地实现DM6437的图像采集与VGA显示,达到了理想效果.     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

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.     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to