实时联机计费数据采集系统的实现方案探讨

计费数据采集系统是电信运营支撑系统的重要组成部分.随着电信技术的发展,实时和联机成为当前计费数据采集系统的主要特征.介绍了实时联机的计费数据采集系统的架构、工作流程和特点以及对未来系统的展望.     

一种支持多传输方式的嵌入式数据采集系统的设计与应用

提出了一种支持多种传输方式的嵌入式数据采集系统的设计方法与实现过程,重点讨论了支持多传输方式的实现方法,最后描述了支持多传输方式的嵌入式温度采集系统.所研究的嵌入式数据采集系统由嵌入式数据采集服务器、智能数据采集节点及远程客户端构成,数据采集服务器包含了核心模块和通讯接口模块.其中核心模块采用基于Linux操作系统的ARM开发板实现.通讯接口模块和智能数据采集节点采用凌阳公司的SPCE061A开发板实现.远程客户端则基于PC机和具有Windows Mobile操作系统的智能手机平台实现.     

PCI总线高速数据采集系统的实现

阐述了基于PCI总线高速数据采集系统的原理、组成和功能,以及进行高速数据采集和存储的方法.此外,还讨论了基于本采集系统的驱动程序和应用程序的一般设计方法.该系统设计与技术的特性可在其它类似的高速数据采集与处理系统中应用.     

基于虚拟仪器的机床切削力采集与数据处理系统

利用国产数据采集设备和虚拟仪器技术开发了机床切削力数据采集与处理系统,该系统可以具有信号采集.数据处理、存储以及图形显示等功能.     

超限报警报表输出设计方案探讨

本文针对数据采集系统中超限报警报表设计问题进行了探讨,其中着重讨论了多路快速信号数据采集系统的超限报警报表设计问题,并提出了几种具体的设计方案.而后通过实例阐述一个多路快速信号数据采集系统超限报警报表的硬件和软件设计过程.     

基于PC-BASE PLC的油井远程数据采集系统的设计与实现

对系统的软硬件架构、数据采集通信过程等难点和关键技术进行讨论.以PC架构可编程控制器ADAM 5510M为核心处理器,设计了油井远程数据采集系统.系统采用成熟的GPRS网络,结合嵌入式系统的软硬件技术,完成了远程数据采集处理,以达到远程实时监测、控制的效果.     

基于PC机的数据采集及其通信系统

介绍基于PC的单片机数据采集系统,首先给出了系统的硬件构成及其工作原理,讨论了PC机和单片机之间的通信原理及通信方法,同时给出了VB通信程序的设计要点.为了使数据采集系统程序具有良好的保密性,最后讨论了单片机应用程序的加密原理及加密方法.本系统的使用,解决了大数据量的数据采集、存贮和复杂图表的显示等问题.     

远程无线数据采集系统的设计

针对远程无线通信的飞速发展,本论文结合对电力塔环境参数的具体要求,详细设计研究了远程无线数据采集系统,在简单分析和设计了系统的总体结构和功能设计方案的基础上,重点探讨研究了远程无线数据采集功能的实现,从数据采集和远程无线传输通信两个角度详细论述了远程无线数据采集系统的实现,对于进一步提高我国在远程无线数据采集传输领域的研究应用水平具有一定借鉴意义.     

基于LabVIEW的并行数据采集系统设计

为了解决云粒子测量系统中并行数据采集通道之间的信息交互问题,采用LabVIEW中库函数节点、消息队列和状态机相结合的方法,实现了多路不同速率数据的并行采集,试验验证了该并行数据采集方法的可行性.研究结果表明:基于LabVIEW进行并行数据采集,不但快速、简单,并且能够有效提高数据采集效率,方便进行系统扩展.该方法对多路并行数据采集系统设计具有一定的参考价值。     

基于多通道数据采集的液压实验台改造

对原有DS4液压实验台进行了改造,运用传感器和数据采集系统取代传统的人工测量.系统引入4路压力传感器和1路流量传感器以自动检测压力和流量值,运用数据采集卡实时采集相应信号,运用LabVIEW自行编制多通道数据采集系统实现实时数据显示和数据存储,在实验完毕后可检索得到实验过程中的详细数据并以报表展示.最终结果表明系统可同...     

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。     

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.     

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.