基于GSM短信模块的家庭防盗报警电路的设计

介绍了基于GSM短信模块的家庭防盗报警系统,阐述了系统硬件和软件的整体设计方案、器件选型、单元电路设计及整体电路连接。系统以STC公司生产的低功耗单片机STC12LE5A60S2为处理器,以SIMCOM公司的SIM900A模块作为无线通信模块,并通过红外感应模块和微波传感器模块监测入侵信号,当两个模块同时监测到入侵信号时,系统通过短信向外界报警,实现了远程报警功能。通过测试证明,该系统性能可靠、成本低,可广泛应用于现代住宅中。     

基于AT89C2051的超声波测距系统

介绍了利用超声波传感器实现的非接触式距离检测系统．该系统可以用于汽车倒车时的报警、液位和物位的非接触式测量，介绍了超声波传感器原理及系统各单元的设计．系统中采用了AT89C2051型单片机作为主控制器．把一种直流电机PWM调速芯片应用到此系统中，使得控制方法简便，应用范围增强，同时可以利用单片机设定距离值和输出控制信号．最终距离用串行方法在数码管上显示出来，可以直观地查看距离值，以实现测距、显示、输出控制信号的功能．     

基于GSM的防盗报警系统设计

文章设计了一种基于GSM模块的防盗报警系统。系统硬件包括单片机最小系统、键盘电路、数码管显示电路、人体红外传感器信号处理电路、声光报警电路及SIM900A接口电路等。实现了手动输入接收端手机号码、号码修改并确认后开启防盗报警模式、有人闯入时自动发送短信开始报警等功能。     

基于AVR单片机的智能家庭测控报警系统设计

本设计实现的是一种基于AVR单片机控制的智能家庭测控报警系统,该系统结合了GSM移动通信技术、LCD液晶显示技术、红外遥控技术以及语音录放技术,系统采用点阵式液晶12864显示时间、日期及温度,具有人性化和美观的页面效果,具有传统的时间显示和调整功能之外,该系统还兼有防盗报警、火灾报警、语音报时以及红外遥控等功能。     

红外对射的无线发射新型智能红外报警系统

针对安防技术不断发展的现状,利用红外线隐蔽性高、保密性高、抗干扰能力强等特点,设计了一种红外报警系统,该系统利用声光报警器、红外线对射管、单片机等设计了报警器驱动电路、电压驱动电路等部分.通过红外对射管继电器的开闭情况经放大处理后传送给单片机,经过单片机的处理通过放大驱动电路智能控制红外报警器的状态;此外,通过无线发射模块可以将现场是否发生报警的情况传到上位机.试验结果表明:该红外报警系统可以快速有效地实现上述所有功能,达到保护生产生活安全的目的.     

烟草分拣线条烟烟姿检测识别装置的设计与实现

设计利用C8051F系列单片机和光电检测传感器,制作的一种分拣线条烟烟姿检测识别装置设计.通过四路光电检测传感器,检测物流输烟流水线竖烟等故障情况,采用单片机程序处理检测信号,判断故障信息,输出故障信号,并启动蜂鸣器报警.结果 利用光电传感器实现的检测装置设计完成,该装置兼具信号检测、监控和报警的功能.结论 设计完成的竖烟检测装置可成功应用于烟草物流分拣线上,对分拣线烟资故障实现监控和预警,提示工作人员及时检修.     

LCD液晶数字显示红外脉搏表

主要介绍了LCD液晶数字显示红外脉搏表硬件设计。该脉搏表使用光电传感器和指端光电容积法检测血流，采集到的脉搏波信号经过放大电路放大，再经过电压比较器输出逻辑信号，单片机EM73461A通过对此逻辑信号的处理实现计算测量功能。此脉搏计还包括数字时钟显示和计时／倒计时功能。     

基于AT89C51单片机的烟雾报警装置设计

目前,随着大功率电气设备的普及,由此产生的火灾越来越多,为了保护人民生命财产的安全,预防和监测火灾成了当今社会急需解决的问题。该系统为一个以家庭、学校及办公楼为监视范围的单片机烟雾报警系统,以AT89C51单片机为控制器,通过MQ-2烟雾传感器检测信号,经A/D转换后,输入单片机,并通过单片机控制蜂鸣器,实现烟雾报警,该系统具有可靠性高、成本低、易维护等特点。     

基于PSTN的远程提醒装置

阐述了基于PSTN网的远程提醒装置的设计与实现,该装置利用单片机和双音多频(DTMF)信号编解码器实现了在公用电话网上的远程报警功能。当发生意外状况的时候,用户通过扳动开关或者按下按键,单片机就从等待唤醒模式转为正常工作模式,系统向电话线上发出双音多频信号,实现向保安系统的拨号来告知发生情况。该系统用于对一些小型单位或者教室提供远程报警的功能。     

红外遥控自动浇花装置的设计

该设计基于红外线系统、湿度传感器和单片机设计了一个远程遥控自动浇花装置。系统通过YL-69温湿度传感器,收集土壤相对湿度的信号,红外遥控设置适宜的相对湿度,单片机处理数据后,输出信号控制继电器工作,进而控制水泵工作,实现浇水,来达到土壤湿度可以适合植物的生长,远程遥控浇水的目的。     

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.     

A computer generator for randomly layered structures

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

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。     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

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     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.     

Tracking data management using topology of moving object database system for moving object constrained trajectory in LBS application

Advances in wireless technologies and positioning technologies and spread of wireless devices, an interest in LBS (Location Based Service) is arising. To provide location based service, tracking data should have been stored in moving object database management system (called MODBMS) with proper policies and managed efficiently. So the methods which acquire the location information at regular time intervals then, store and manage have been studied. In this paper, we suggest tracking data management techniques using topology that is corresponding to the moving path of moving object. In our techniques, we update the MODBMS when moving object arrived at a street intersection or a curved road which is represented as the node in topology and predict the location at past and future with attribute of topology and linear function. In this technique, location data that are corresponding to the node in topology are stored, thus reduce the number of update and amount of data. Also in case predicting the location,because topology are used as well as existing location information, accuracy for prediction is increased than applying linear function or spline function.