农村电网远程监测系统的设计

介绍了农村电网远程监测系统的设计方案,阐述了其系统结构及总体功能,重点介绍了用于该系统的嵌入式网络服务器的设计及通信软件的设计以及该系统所涉及的数据采集技术、实时网络通信技术等。     

基于ARM9的嵌入式Linux网络通信系统设计与实现

目的 设计基于ARM9平台的嵌入式Linux网络通信系统.方法 选用S3C2410微处理器与工业级网络接口芯片CS8900A进行硬件电路设计;软件系统设计包括移植嵌入式Linux操作系统、制作cramfs根文件系统和创建socket套接口的服务器和客户端应用程序.结果 构建了以ARM9和嵌入式Linux系统为平台的服务器,成功地实现了服务器和客户端的网络通信.结论 基于ARM9平台的嵌入式设备可以很好地通过网络和其他通信系统进行信息交换.     

基于C／S模型的智能交通系统设计与实现

基于交通监管实时性、远程化、智能化等性能指标要求,设计并实现了一款基于DSP和C／S（client／serv—er）模型架构的智能交通系统．在分析现有智能交通系统发展现状的基础上,以TMS320DM6467芯片为核心搭建嵌入式系统框架,裁剪移植Linux操作系统平台．考虑Linux对网络支持的稳定性,阐述了在其上如何建立c／S通讯模型,完成嵌入式系统,远程监控系统,网络摄像头以及系统内部的线程通信．测试结果表明,系统设计合理,能够满足现实交通监管实时眭、稳定性、智能化的需求．     

嵌入式Linux飞行器视频采集与处理模块设计

为提高微型飞行器无线视频的传输距离及传输质量,选用S3C2440微处理器为控制中心、OV9650摄像头为移动端视频采集设备,给出了视频采集与处理模块的总体设计方案和硬件结构.模块开发基于嵌入式Linux平台,设计并实现了遵循V4L2(Video For Linux 2)驱动标准的移动端视频采集模块、基于H.264的视频编解码模块以及适用于3G/4G的无线网络通信模块,其中无线通信采用RTP协议,以满足视频无线远程传输的实时性要求.结果表明,该系统传输的视频满足清晰、稳定与延时低的要求,具有一定的实用前景.     

嵌入式穆斯堡尔谱数据采集系统

尝试引入嵌入式Linux技术，构建了以嵌入式实时Linux为平台的穆斯堡尔谱实验数据采集与远程监控系统。定制了基于实时Linux的嵌入式实时操作系统，并在其上实现远程穆斯堡尔谱实时数据采集、存储、图谱显示以及数据拟合分析的嵌入式穆斯堡尔谱数据采集系统。用户可通过互联网在远端利用浏览器或使用。Java应用程序实现实验过程跨平台的实时监控。该系统具有使用简便、抗干扰力强、制作简便等特点。提出一种对现有旧实验仪器进行智能化、网络化改造的比较经济可行的方案。     

基于嵌入式Web服务器的远程监控系统

针对传统Web技术路线不能直接用于构造嵌入式Web服务器的问题,提出一种基于ARM—Vxworks和Web技术的嵌入式远程监控系统．介绍了系统设计原理和实现方法．给出了Vxworks平台下嵌入式web服务器的实现方法,包括Goahead的移植与配置．该系统结合Goform技术实现远程实时数据采集和报警,具有跨平台性,有效解决利用有限资源实现设备的网络接入问题．具有较好的性价比．管理者可以通过Internet利用Web浏览器完成对远程设备的访问、监控和维护等操作．无需安装特定软件．     

嵌入式Linux系统中基于Web的远程监控系统的设计

介绍了在嵌入式Linux操作系统下、基于Web的网络智能设备监控系统的设计方案和软、硬件的实现,研究了嵌入式Linux平台下动态Web技术的实现方法和CGI程序的设计方法,实现了在嵌入式Linux平台下利用Boa作为Web服务器的远程在线监控系统,并给出了测试结果,成功实现了远程监控功能.     

基于NiosⅡ的嵌入式智能网络家居系统的设计

研究了一种基于SOPC技术的嵌入式智能网络家居系统的设计方法,该系统通过在FPGA芯片上配置Nios Ⅱ软核处理器和相关的接口模块来实现嵌入式系统的硬件平台,接着在该平台上移植uCLinux操作系统、并配置BOA服务器,实现了基于B/S模式的远程智能控制系统.用户可以通过客户端浏览器访问嵌入式BOA服务器对远程家居中的电器进行状态查询和控制.由于采用了先进的SOPC技术,本系统具有设计效率高和灵活性好等优点.     

一种基于Android的无人机远程定位系统的设计

采用STM32F07VCT6作为嵌入式MCU构建现场控制器,应用定位技术、获取定位对象(无人机)的地理信息,通过GPRS或3G等与数字移动终端进行通信,从而能在数字终端的地图上定位无人机的位置。该无人机远程定位系统主要实现如下功能:远程网络通信,无人机位置信息采集,位置信息传输,在数字地图上进行位置定位。     

嵌入式虚拟仪器模拟通道的远程重构

本文提出了一种基于Internet和ISP技术的嵌入式虚拟仪器模拟通道的远程重构方案.该方案对于便携虚拟仪器平台的远程实现具有重要参考价值.     

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.     

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.     

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.     

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.     

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.     

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.