基于FPGA的视频叠加系统的设计与实现

本文设计针对装备观瞄系统中的视频信息的叠加,主要是接收上位机传来的瞄准十字线参数和目标位置信息,利用FPGA实现在视频图像中叠加用与瞄准的高精度可控,能实时根据背景灰度值自动调整自身灰度值的十字线和目标参数,而且系统中叠加到视频图像上的瞄准十字线可以单像素移动,实时改变自身灰度值以形成反差,更有利于观察瞄准,这是以往视频叠加系统做不到的。作为一种新型的视频叠加技术,它具有灵活性强、体积小、功耗低等特点。     

基于CPLD的实时视频采集模块

设计实现了一个基于CPLD的实时视频采集模块.该模块采用SAA7111A增强型视频处理器、CPLD和FIFO芯片实现了视频的实时采集,为后续设备对视频的处理提供了有效数据.重点介绍视频模块接口的时序,并给出了相应的Verilog HDL代码.     

随钻声波测井数据存储技术研究

随钻声波测井数据量大,且受实时传输速率限制,需要采用大容量非易失FLASH存储器保存测量数据.根据随钻声波测井数据存储需求,采用NAND FLASH作为随钻声波测井仪的数据内存,设计了NAND FLASH接口电路,采用整页存储方式将数据存入NAND FLASH,并给出了NAND FLASH存储流程,实现了随钻声波测井的数据存储功能.     

基于PAL的弹载图像采集系统设计

针对弹载图像采集面临的高噪声、高振动等恶劣环境,设计并实现了一种基于PAL制式,通过SPI串行接口进行数据存储的视频图像采集系统。从系统的设计思路、工作流程和硬件结构出发,采用乒乓缓存设计和流水线结构,解决了ADV7180的高速图像数据输出和串口FLASH存储器的低写入速度不匹配的问题。通过实验分析,本设计可以解决高低速存储介质中速度匹配问题,实现对高速图像数据精确的存储和记录,为后期图像恢复提供了可靠的数据。     

基于DSP和USB技术的视频图像监控记录系统

介绍了基于DSP和USB技术的脱机视频图像监控记录系统,记录事发现场的图像,为事后处理分析提供信息.该系统体积小,带有CF卡存储器和USB接口,可以独立安装使用,也可作为大型监控系统的辅助设备.阐述了系统硬件和软件设计的技术细节,包括图像采集、图像压缩、图像存储和文件传输等.     

基于.NET的图像压缩存储技术研究

图像压缩存储技术对于图像数据在数据库服务器中实现快速传输与存储具有重要意义。针对.NET应用程序开发过程中的图像压缩存储问题,在对图像压缩编码、GDI+技术与ADO.NET技术分析研究的基础上,提出了一套实用的图像压缩存储算法,并通过一个基于三层架构的Web应用程序实例介绍了该算法的具体应用方案。     

数字视频监控系统

采用通用高速数字信号处理器(DSP)和可编程逻辑器件(CPLD)设计了视频图像目标快速识别与跟踪系统。     

基于FPGA的视频图像监控系统的研究

本文介绍了一种采用FPGA实现视频图像采集与处理的系统,该系统充分发挥了FPGA器件的并行特性,显著提高了图像处理速度．较好地实现了视频图像的实时监控、识别和联动报警功能。     

基于LVDS的高速远程图像采集存储系统

设计了一种基于LVDS总线的以NAND型FLASH为存储核心的高速远程图像采集存储系统,实现了高速遥测图像数据的采集及实时存储。重点研究了高速A/D采集技术、LVDS高速数据传输技术,保证了远程图像数据的有效接收,同时采用双片选交替双平面页编程方式,将29.85MB/s的两路高速实时图像数据存储于FLASH芯片中。着重从系统硬件电路和逻辑时序两方面进行研究设计,经大量测试表明存储器性能稳定,存储可靠,可以完整记录两路高速遥测图像数据,满足设计要求。     

基于DSP的号码图像实时采集系统

针对便携式号码图像采集与处理设备,设计了一种基于DSP的号码图像实时采集系统.系统以DSP为核心处理单元,采用CMOS图像传感器采集图像数据,并将图像数据直接保存到系统指定的位置,设计中以CPLD为数据采集逻辑控制单元,实现同步时序控制及并串数据转换功能.实验表明,系统可按15幅/秒的速度实时采集到大小为176×62的清晰的号码图像,并具有DSP实时处理图像的可扩展性.     

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.     

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.     

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.     

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.     

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.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

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。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.