基于Cortex-M3和互联网的分布式测试系统设计

介绍了以Cortex-M3微处理器为核心、基于互联网的分布式测试系统,分析了系统的各部分功能。提出了分布式测试系统总体设计框架以及设计原则。并分别给出了分布式测试系统中主控制器模块、模拟输入输出模块和以太网接口电路模块等的硬件设计和该测试系统平台的软件模块设计。其中包括嵌入式软件和CPLD控制模块软件的设计。通过反复实验测试,该分布式测试系统运行效果极佳,能非常可靠的进行数据采集、控制、传输,采样率和采样精度也达到预期值。     

输油管道防盗油系统的监测与控制

本文根据输油管道防盗油系统数据监测的特殊要求,设计了基于分布式结构的数据采集系统,该系统以工控机为上位机,DSP信号处理模块为下位机,实现了实时性较好的输油管道监测与控制,本文主要对分站控制系统中信号处理模块进行详细的硬件设计。     

分布式数据检索系统的设计与实现

提出了一套对非结构化数据进行分析和检索系统的设计方案.采用分布式技术在windows平台上建立了一套以任务分发服务器为中心,运算终端为任务处理单元,带有反馈和容错机制的分布式数据检索系统.在给出系统模型和设计思想基础上,对各个功能部件进行了模块化设计,并对各模块故障进行了测试.结果表明,系统能够在部分模块出错的情况下稳定运行,能够满足在实际工作中的需求.     

基于OPC技术的快速故障诊断实时数据平台设计

为了实现快速故障诊断,该文提出了1种利用过程控制中的对象连接与嵌入(OPC)技术实现分布式容错控制实时数据平台的设计方法,建立实时快速故障诊断模块,将故障诊断部分交给故障诊断模块来处理,将故障诊断的结果作为实时优化先进控制模块的输入和控制器重构或重组部分的依据,同时事件总线技术的应用提高了系统的响应时间.实验结果表明:该平台可以提高故障诊断的检测率和检测时间,为将容错控制成功地应用于工程奠定了基础.     

分布式实时系统的软件故障注入

针对分布式实时系统的可信验证的难题,建立通用故障模型,将故障模型分为:内存故障、CPU故障、通信故障和服务故障4种。提出一种建立在分布式实时系统环境中的软件故障注入系统结构,它分为3个层次:目标系统、通信网络、软件故障注入系统。软件故障注入系统分3个部分进行设计,软件故障注入器、数据收集模块和故障数据分析模块。对基于该结构的软件故障注入过程进行了说明,实现软件故障注入系统并做了相应的实验分析,实验检测到故障多数为通信故障、内存故障和CPU故障,其覆盖率分别为37.68%、15.47%和15.17%。实验证明这种体系结构很适合分布式实时环境的应用,同时也为进一步研究软件可信验证提供了理论基础和实例依据。     

基于蓝牙技术的数据采集系统的设计

本文通过蓝牙模块间传输层数据通信的流程和实现方法，设计出了蓝牙无线数据采集系统。该系统整个装置由前端数据采集、传送部分以及末端的数据接费部分组成。本课题所设计的数据采集蓝牙无线传输模块，可以在短距离内用无线接口来代替有线连接，有效的实现了对现场数据的采集和短距离内数据的无线传输。     

分布式FTP系统的设计与实现

为了提高FTP系统在并发多用户状态下的数据传输速率和响应速度,设计了基于分布式理论的新型FTP系统,将命令处理和数据处理分离,并应用JAVA RMI技术实现了该分布式FTP系统。介绍了分布式FTP系统的设计和实现过程,给出了FTP元命令处理流程图和核心模块的设计原理图。运行结果表明,此分布式FTP系统增强了处理并发请求的能力、提高了数据传输速率．验证了此设计方案的可行性。     

基于云架构的蒙古文硕士论文检索系统的设计与实现

设计了蒙古文硕士论文检索系统,并实现了一个基于云架构的分布式论文检索系统。设计完成了满足分布式要求的蒙古文分析器,作为系统核心模块在分布式多节点上实现了蒙古文的索引和检索功能。在分布式索引方面,主要实现数据哈希分片、蒙古文分析器对每个分片进行分析、评分并建立倒排分片索引。在检索方面,使用BM25概率模型可对蒙古文论文检索和排序,并具有关键词或摘要的中文检索功能。分布式蒙古文硕士论文检索系统,可为进一步研究主题分析提供高质量的蒙古文硕士论文数据。     

CIRS1153检索模块的设计及实现

本文着重讨论了运行在国产小型机DJS1153机上的汉字情报检索系统的检索模块的设计原则及实现。首先,介绍了整个系统的概貌及数据结构,而后论述了命令的标准形式,查找算法(特别着重论述了词库的查找算法),整个检索模块中各用户进程的划分及调度策略,最后阐述了内存区的管理。     

基于混合处理模型的乱序数据流分布式聚合查询处理技术

为了解决现有的乱序数据流聚合查询处理技术不能在降低查询处理延迟,同时保障聚合查询结果的最终正确性的局限性问题,本研究设计了混合嵌入分布式流处理模块和分布式批处理模块的乱序数据流分布式聚合查询处理技术。该技术一方面基于用户给定的结果质量,限制自适应地优化流处理模块所用的缓冲区大小,从而尽可能降低流处理的查询处理延迟;另一方面基于备份于分布式数据存储系统的历史流数据,并以批处理的方式实现对极其晚到流元组的查询处理,从而保障聚合查询结果的最终正确性。基于真实的乱序数据流数据集对该技术进行测试分析表明:该技术在平均查询处理时延、查询结果精度和系统可扩展性方面,比目前最好的基于缓存的乱序数据流处理技术均具有显著优势。     

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