基于ZigBee GPRS面向普适计算的远程抄表系统

介绍了一种基于无线ZigBee和GPRS技术的远程抄表系统.该系统采用ZigBee技术从本地获取数据,通过GPRS进行远程传输,详细分析了系统结构以及相关实现技术,并提出将该系统扩展成为一个普适计算的范例的设想.     

融合GPRS技术的ZigBee无线网络水质监测系统的设计

利用基于ZigBee技术的无线传感器网络和SOC片上系统,设计了基于无线传感器网络的远程水质监控系统．系统融合ZigBee技术和GPRS无线通信技术,结合GPS定位技术,并利用GPRS与Internet的对接技术,实现了地下水质检测数据的远程传输和监测的目的．     

基于无线传感器网络和GPRS的温湿度远程监测系统

本文针对现有温湿度监测系统的缺陷和不足,采用基于ZigBee的无线传感器网络和GPRS技术,设计实现了一种真正能进行远程环境温湿度监测的系统。本方案充分利用现有的ZigBee和GPRS模块化设备进行组网,编写了ZigBee协调器与GPRS模块的接口程序,并实现了上位机监测软件。结果表明,系统运行稳定、采集温湿度数据准确、部署方便灵活。     

基于ZigBee和GPRS的远程无线抄表系统设计与实现

针对现有的自动抄表方案成本高、功耗大、组网规模小、线路干扰等问题,提出一种新的无线抄表方案。结合ZigBee技术与GPRS网络,设计了一套远程无线抄表系统,局域网络采用ZigBee短距离无线通信技术,广域网络采用GPRS远程无线通信技术,组建的系统具有低成本、低功耗、自组网和自适应等特点,而且有较强的可移植性和兼容性。现场测试结果表明,该无线抄表系统能够快速准确地完成数据采集和传输任务,并具有较强的抗干扰能力和广泛的适用范围。     

基于ZigBee+GPRS的电子橱窗远程控制系统设计

针对户外智能电子橱窗控制困难和安全性不高的问题,提出一种基于ZigBee和GPRS的智能电子橱窗远程控制系统设计方案.该系统以CC2430微控制器为核心芯片,由Z-Stack协议栈实现ZigBee无线传感器网络的组建,实现多点分布式控制,采用GPRS远程通信技术将采集到的震动警示信息传输到用户移动终端.该系统具有自动调节橱窗背景灯的亮度、节能和光污染少等特点.     

露天停车场信息感知发布和管理系统

设计一种基于ZigBee和GPRS无线通信技术的智能露天停车场信息感知发布和管理系统,采用CC2530及地磁传感器组建ZigBee无线局域网,实时采集停车场内停车位的使用状况,通过GPRS无线通信技术将停车场信息发送到远端服务器,实现多个停车场信息的统一发布和管理.可以同时利用百度地图将停车场位置信息显示在远端WEB服务器前台页面上,可由用户或管理员远程登录或本地直观查看停车位状态信息.测试结果表明:该系统实现了露天停车场状态信息的及时准确发布,可以应用于实际的智慧城市系统.     

基于无线通信网络的远程医疗监护系统设计研究

介绍了一种基于ZigBee网络的无线远程监护系统,对无线节点分布进行了规划,并分析了系统容量和网络扫描时间,从理论上证实了无线覆盖方案具有可行性。文中提出了在院内覆盖ZigBee无线网络和院内LAN相结合的组网方式,并分别基于Internet和GSM/GPRS设计了对合作医疗机构患者和家庭患者的远程通信方案。该系统具有功耗低、成本低、可靠性高、覆盖面广等特点。     

基于ZigBee技术的远程无线温湿度测控系统的设计

目的 为实现工农业生产中对温湿度参数的远程无线实时测控.方法 采用ZigBee技术的无线传感网络与GPRS网络相结合的体系结构,基于CC2430芯片设计无线传感节点,并开发其软件.结果 通过ZigBee组网,进行测试,该湿温度无线测控系统具有稳定的数据采集和传输质量.结论 提高了系统的灵活性和可扩展性,可作为传感监控网络的后续研究平台.     

基于GPRS技术的远程数据采集与分析系统

介绍了一种基于GPRS（通用分组无线业务）技术的远程数据采集与分析系统，给出了系统框图．该系统利用MSP430FG439MCU组建下位机，完成振动信号的采样、存储和信息远程传输，运用VB和MATLAB混合编程的上位机软件对振动信号进行时域和频谱分析，通过GPRS技术实现远程数据的无线传输．     

基于ARM和ZigBee的智能家居系统研究与设计

为了实现智能家居系统的远程控制与管理功能,即控制者能够通过互联网或手机在远端对家用设备完成相应操作,将ARM处理器和ZigBee无线传输技术相结合,并改良了工作流程,研究并设计了新型智能家居系统。该系统以基于S3C2440微处理器的网关为系统核心,ZigBee部分采用TI公司的增强型产品CC2530,远程采用GPRS、Web等方式,通过互联网达到控制与管理家用设备的目的。结果表明:该系统稳定可靠,达到了预期目标。     

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.     

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.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

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.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

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-