浅析热量表远传抄表系统

为推进用户节能行为,分户热计量技术得到广泛应用,大量的热量表安装在居民小区内,这对热力公司的收费管理与服务水平提出了更高的要求。本文介绍了热量表远传抄表系统的优点、结构组成、功能、特点。     

基于Windows CE智能钻井监控系统

针对国内外现存的油田钻井监控系统的现状,提出了一种适用于离散井群的监控系统,该系统以 Windows CE 嵌入式操作系统为核心,利用串口及 FF 总线与底层 I/O 节点进行数据通信,并实现对下层设备的实时监控。主控制台可以直接联入 Internet,应用嵌入式系统中的网络功能,将系统信息向维修中心的服务器传递,实现远程数据的采集与监控功能。     

基于S3C2410微处理器和GSM远程抄表系统设计与实现

介绍了一种基于Linux操作系统的远程抄表系统实现方案,采用ARM9系列S3C2410处理器、无线通讯模块SIM100-E,在嵌入式Linux操作系统上,应用GSM技术作为数据传输平台,利用其Internet接入功能,用短消息方式实现了数据的实时传输和远程抄表功能,并详细介绍了设计内容.     

基于MSP430和TDC-GP2的超声波热量表设计

热量表是用于测量热交换系统所释放热量的仪表,本文设计的超声波热量表基于M430F4152单片机,使用TDC-GP2芯片设计温度流量测量系统,并配有M-Bus通讯总线接口用于远程抄表收费和管理。本文对整个设计的硬件构成、系统热量计算原理和需要注意的问题等方面进行了讨论。     

嵌入式旋转机械状态监控与故障诊断系统研究

从实现具有自监控、自诊断能力的智能化机械设备的角度,系统介绍了面向Internet的、具有远程监控、诊断、维护和升级能力的嵌入式旋转机械智能状态监控与故障诊断系统的实现技术.该系统采用数字信号处理器(DSP)及嵌入式计算机,实时检测并存储设备运行的转速、振动等信息,由DSP进行故障信号处理和特征分析,并通过自定制的嵌入式Linux操作系统实现了面向Internet的远程软件升级和系统维护,其内嵌的基于移动代理的嵌入式诊断软件可以通过局域网或Internet与远程故障诊断中心自动交互诊断信息,实现协同诊断,有效地提高了设备状态监控与故障诊断系统的智能化水平.     

基于Windows CE的GIS数据采集系统实现

利用GPS系统进行GIS数据采集时,伪距定位精度不高,需要进行后处理来提高精度导致效率降低.为了提高数据采集效率和精度,在Windows CE嵌入式系统中利用快速模糊度解算法,结合Windows CE嵌入式系统的优点开发出了一套可以精确定位、方便使用GIS数据采集的设备.     

基于S3C2410的低压电力线载波抄表系统的集中器设计与实现

集中器是整个抄表系统的重要组成部分,其工作情况决定了抄表系统的稳定性,本文分析了集中器的功能,详细介绍了集中器的设计过程,包括集中器总体设计、集中器硬件设计和集中器软件设计等.通过引入嵌入式处理器芯片S3C2410,嵌入式LINUX操作系统和载波芯片MI200,使集中器成为具有多线程工作,多频点传输,多种方案互补的稳定的抄表系统核心.通过小范围测试,数据在单相电力线上的发送接收效果良好.     

无线POS机的设计与实现

为了实现对销售网点信息的实时录入和无线传送,提出了一种基于S3C2440硬件平台和嵌入式Windows CE操作系统的无线POS机的系统设计方案.利用Windows CE典型的并行开发方法,分别设计了主控系统和无线通信驱动模块,并对主控系统、无线网卡、读卡、触摸屏等重要模块进行了测试.测试结果表明,本文设计的无线POS机性能满足要求.     

USB KEY设备在Windows CE下的驱动实现

针对USB KEY设备,介绍了在嵌入式系统Windows CE下流设备驱动的实现.     

热力管网远程计量监控系统的应用介绍

热网远程计量监控系统主要用于热电厂对分布在数公里范围内不同地点的各个热用户的用汽量进行远程监控。该系统通过无线通讯网络实现远程自动抄表、实时抄表、同步抄表,为双方的贸易结算提供准确、可靠的数据,为解决纠纷提供记录证据。它不但可以实时显示各热用户处蒸汽的温度、压力、瞬时流量和累计流量,又能对整个热网进行全面的24小时监视及数据记录,对现场流量测量装置的工作状态进行实时监控,并将现场的各种工作参数、各种报警信息进行远程显示、诊断,使得现场的计量设备发生故障时能得到及时维护,防止某些不良用户的用汽舞弊行为。与以往传统的管理手段相比,该系统可减少人为错误,避免纠纷,降低人工成本,从而大大提升整个热网的经济效益。     

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.     

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.     

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.     

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.     

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.     

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.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that