矿山个人双向信息传输系统设计与实现

 针对煤矿工人下井后难以了解所处环境安全性的问题,提出了一种基于矿山个人双向信息终端的解决方案。介绍了基于Wi-Fi的矿山个人双向信息传输系统结构与功能,以低功耗GS1011智能芯片为核心,设计并实现智能矿灯嵌入式个人信息终端,分析了双向信息终端的工作原理,设计并实现了智能终端的实时定位算法,利用智能终端技术与三维井巷建模技术构建了煤矿三维虚拟现实系统。系统主要功能为主动感知周围安全环境、与地面及其他矿工信息交流、对矿工进行实时定位跟踪管理。本系统应用于徐州夹河煤矿物联网示范工程,取得良好效果。     

邻居发现辅助与物联网整合应用

随着网络技术的发展,接入网络的设备已不再局限于由人操控的计算机,在物联网技术极大的丰富物理信息世界的同时,拓扑的动态性也带来了与传统网络不同的移动性问题。如何对节点进行高效的定位和数据传输成为需要解决的问题。笔者结合IPv6本身对移动性的支持和邻居发现机制,提出了一种使用邻居发现机制的移动节点辅助连接方法,并拟定了在6LowPAN中的实现方案,使6LowPAN与传感器、射频识别和控制终端等结合,实现局域物联网内以IPv6方式连接,满足小范围移动切换需求,通过IPv6接入Dragon-Lab联邦网络,实现全IPv6的物联网应用模型。     

国产“麒麟”操作系统成功应用于卫星定位智能终端和桌面终端

正9月25日,湖南省科技厅组织专家对湖南湘邮科技股份有限公司承担的省承接国家科技重大专项成果转化专项"基于国产‘麒麟’操作系统的卫星定位智能终端和桌面终端产业化"项目进行了综合验收,项目实施取得了较好的经济和社会效益。项目运用"国产‘麒麟’嵌入式操作系统、桌面操作系统以及国产北斗卫星导航技术",实现了基于国产"麒麟"操作系统的卫星定位智能终端和桌面终端的产业化,解决了终端产品应用国     

基于NB-IoT技术的物联网网关多协议转换研究

为了提高物联网网关多协议转换的稳定性,提出基于NB-IoT技术的物联网网关多协议转换技术。在构建物联网路由节点定位模型的基础上,采用高效可靠的机会网络路由分布设计方法,设计物联网网关多协议传输的邻阶均衡控制模型。然后进行网关多协议调节,通过节点自适应定位构建分簇节点部署模型规则。基于此,采用NB-IoT技术实现对物联网网关多协议转换过程中的多层次路由规划和算法的设计,提高转换过程的可靠性和自适应。仿真结果表明,该转换技术的输出均衡性较好、传输正确率较高,提高了物联网的输出稳定性。     

基于物联网的敬老院环境监测系统的设计

提出了一种基于物联网的敬老院环境监控系统。该系统由众多的终端节点、路由节点以及汇聚节点组成无线传感器网络。终端节点作为监测节点采集并处理环境数据,并通过无线传感器网络将数据传至网关节点,网关节点将数据传至互联网以及监控中心,这样就能实现对敬老院的环境进行监测。     

基于蓝牙技术的可穿戴式智能环境参数采集系统

提出了一种基于蓝牙技术的无线可穿戴式环境参数获取系统,其采用智能手持终端(例如手机),实现了将个人用户周边环境信息的实时采集,融合了可穿戴式传感器、物联网技术以及智能终端等技术。系统集成了多种传感器,可检测温湿度、光照、气压、PM2.5等。另外,该系统很容易通过增加传感器种类和数目实现扩展,还可以与其他系统通过广域网进行无线组网,实现一个大型环境参数监测无线传感器网络,将会在环境监测、天气、自然灾害预警方面得到广泛发展。     

基于物联网的智能家居监控系统设计与实现

随着物联网、移动通信、互联网+等技术的快速发展及应用,时尚、便捷与智能的家居生活体验已不再是幻想,文章主要论述移动智能家居远程监控系统的设计与实现.系统终端节点采用CC2530与Zigbee技术进行数据采集与控制,网关上采用WIFI模块进行网络通信,智能终端监控以Android系统为平台.实现了远程移动的温度、湿度的数据采集、可燃气体检测与报警、人体感应,模拟了窗帘、门等设备的控制功能与状态检测,系统测试稳定.该系统具有很强的扩展性、移植性,可以拓展应用到宾馆、超市、工厂等场所,具有较高的应用价值.     

浅谈物联网的组网技术与应用

物联网是指通过射频识别（RFID）、红外感应器、全球定位系统、激光扫描器等信息传感设备,按约定的协议,把任何物品与互联网连接起来,进行信息交换和通讯,以实现智能化识别、定位、跟踪、监控和管理的一种网络,即＂物物相连的互联网＂。物联网的关键技术是RFID电子标签技术,移动支付作为物联网的一个分支也称为手机支付,就是允许用户使用其移动终端（通常是手机）对所消费的商品或服务进行账务支付的一种服务方式。     

传感网络终端时钟同步的目标定位模型分析

由于传统目标定位模型分析会增加目标定位时延,为了缩小目标定位时延,提出了传感网络终端时钟同步的目标定位模型分析。通过传感网络终端的仿真计算,分析了时钟同步的目标状态,在选取合适的模拟方法基础上,确定了目标节点位置与定位系数之间的关系,设计了传感网络终端时钟同步的模拟过程,完成传感网络终端的时钟同步模拟;在模拟后的传感网络终端时钟同步中设置目标采集指令,由路由器将目标采集指令转发,为了确保传感网络终端节点进入待采集状态的准时性,计算了目标的采集时间,采集时间确定后,协调器还要将等待接收反馈目标的时间上传到传感网络终端,完成传感网络终端时钟同步的目标采集;最后通过时钟同步目标定位模型的构建,实现了传感网络终端时钟同步的目标定位。仿真实验结果显示,提出的目标定位模型分析可以缩短目标定位时延。     

基于北斗模块的智能车载终端原理与设计

近几年,随着北斗卫星导航系统的快速发展,北斗双模定位模块的开发技术不断成熟,其相关智能终端的技术产品应用更加广泛。对北斗智能车载终端工作原理进行分析设计,说明该系统如何实现对车辆的通讯、定位、行车数据分析保存、图像记录,以及将相关数据上传到管理中心平台等智能功能的应用过程。     

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.     

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…     

Perspherical Approaches for Electrons in Atoms and Charged Excitons in Quantum Wells

Instead of following Fock’s expansion,we solve the Schrodinger equation for some quantum mechanical manybody systems such as electrons in atoms and charged excitons in quantum wells in a similar way in hyperspherical coordinates by expanding the wave functions into orthonormal complete basis sets of the hyperspherical hannonics(HHs)of hyperangles and generalized Laguerre polynomials(GLPs)of the hyperradius.This leads the equation to     

Advances in broadband wireless communications under high-mobility scenarios

Future mobile communication systems aim at providing very high data transmission rates, even in high-mobility scenarios such as high-speed wheel-track trains, maglev trains, highway vehicles, airplanes, guided missiles or spacecraft. A particularly important commercial application is the strong and increasing worldwide demand for high- speed broadband wireless communications （up to 574.8 km/ h test speeds or 380 km/h commercial speeds） in railways, providing data, voice and video services for applications such as onboard entertainment services to passengers, train control, train dispatch, train sensor status handling and sur- veillance. In such high-mobility scenarios, there are a number of communication challenges, including fast hand- over, location updating, high-speed channel modeling, estimation and equalization, anti-Doppler spreading tech- niques, fast power control, and dedicated network architec- ture. Because signal transmission in very high-speed scenarios will inevitably experience serious deterioration, it is imperative to develop key broadband mobile communi- cation techniques for such high-speed vehicles.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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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。     

Scale-based spatial data model for GIS

Being the primary media of geographical information and the elementary objects manipulated, almost all of maps adopt the layer-based model to represent geographic information in the existent GIS. However, it is difficult to extend the map represented in layer-based model. Furthermore, in Web-Based GIS, It is slow to transmit the spatial data for map viewing. In this paper, for solving the questions above, we have proposed a new method for representing the spatial data. That is scale-based model. In this model we represent maps in three levels: scale-view, block, and spatial object, and organize the maps in a set of map layers, named Scale-View, which associates some given scales.Lastly, a prototype Web-Based GIS using the proposed spatial data representation is described briefly.     

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