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gprs

科技智囊 2001年第12期 14-14页

gprs(General Packet RadioService,通用分组无线电业务)是采用分组数据传输的GSM 核心网的增强。它可高效地利用现有无线电频谱,而且用户获得的接入带宽比通过标准连接获得的带宽更大。gprs 是移动通信从第二

关键词： gprs 通用分组无线电业务接入带宽

Redundancy Elimination in gprs network

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第4期7卷 477-482页

作者： QIU Qin-long ZHANG Dong-mei MA Jian ZHANG Da-jiang National Key Lab of Switching Technology and Telecommunication Network Beijing University of Posts ＆ Telecommunications Beijing 100876 China Nokia Research Centre Beijing 100013 China

The mechanisms of TCP’s retransmission and reset will result in redundant packets. These redundant packets are often sent unnecessarily to the user over a slow last-hop link delaying useful traffic. This is a problem for wide-area wireless links, such as General Packet Radio Service (gprs), because unnecessary transmissions waste already limited radio bandwidth, battery power at the mobile terminal and incurs monetary cost due to charging by data volume. The paper first describes a gprs model, then discusses how to eliminate the redundant packets in gprs network and presents the simulation results in Network Simulation 2 (NS 2). The more traffic is, the more the network can benefit. In heavy traffic, it can even get more than 30% improvement in throughput. Average delay and loss percent are also lowered.

关键词： gprs TCP Redundancy Elimination Network Simulation 2 (NS 2)

Dynamic management system of ore blending in an open pit mine based on GIS/GPS/gprs

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Mining Science and Technology 2010年第1期20卷 132-137页

作者： GU Qinghua LU Caiwu GUO Jinping JING Shigun School of Management Xi'an University of Architecture & Technology Xi'an 710055 China Luoyang Luanchuan Molybdenum Industry Group lnc. Luoyang 471500 China

Using GIS, GPS and gprs, a dynamic management system of ore blending in an open pit mine has been designed and developed. A linear program was established in a practical application. The system is very good at automatically drawing up a daily production plan of ore blending and monitors and controls the process of mining production in real time. Experiments under real conditions show that the performance of this system is stable and can satisfy production standards of ore blending in open pit mines.

关键词： GIS GPS gprs linear programming ore blending open pit mine

Monitoring dispatch information system of trucks and shovels in an open pit based on GIS/GPS/gprs

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Journal of China University of Mining and Technology 2008年第2期18卷 288-292页

作者： GU Qing-hua LU Cai-wu LI Fa-ben WAN Chang-yong School of Management Xi ＇an University of Architecture ＆ Technology Xi＇an Shaanxi 710055 China Luoyang Luanchuan Molybdenum Industry Group Inc. Luoyang Henan 471500 China

Using GIS,GPS and gprs,an intelligent monitoring and dispatch system of trucks and shovels in an open pit has been designed and *** system can monitor and dispatch open-pit trucks and shovels and play back their historical *** intelligent data algorithm is proposed in a practical *** algorithm can count the times of deliveries of trucks and load- ings of *** on real scenes show that the performance of this system is stable and can satisfy production standards in open pits.

关键词： GIS GPS gprs dispatch data processing open pit

The Monitoring System of Smoke Images Based on Embedded System and gprs

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The Monitoring System of Smoke Images Based on Embedded Syst...

Mining production information management system in an open pit based on GIS/GPS/gprs/RFID

第25届中国控制与决策会议

作者： Huang Jinjie Liu Yilian Zhang Haoran Chen Min Department of Automation Harbin University of Science and Technology

ISBN: (纸本)9781467355339

A remote monitoring system of smoke images is implemented by the gprs communications and embedded technology. Some respects of the system are described in details such as the overall framework structure of the system, the hardware configurations, the embedded terminal software platform and the programs developed for both the terminals and the server. With this system, the smoke images of scattered terminals can be collected respectively and sent by gprs wirelessly, and then they are received and analyzed in data processing centre. The system is very helpful to supervising the scattered smoke pollution sources such as the coal-burning thermal plants and the district-heating plants.

关键词： Images process embedded system gprs monitoring system

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Journal of Coal Science & Engineering(China) 2010年第2期16卷 176-181页

作者： GU Qing-hua LU Cai-wu LI Fa-ben JING Shi-gun School of Management Xi＇an University of Architecture ＆ Technology Xi＇an 710055 China Luoyang Luanchuan Molybdenum Industry Group. Inc. Luoyang Luoyang 471500 China

Using GIS, GPS, gprs and RFID, a dynamic information management system of digital mining in an open pit was designed and developed.A linear programming model was set up in a practical *** the model, the system can automatically draw up production plan of ore blending well every *** system can monitor and dispatch open-pit trucks and shovels well, and can play back their historical *** can monitor and control the process of mining production in real *** RFID, the system can also count the number of trucks'delivery and shovels'loading *** on real scenes show that the performance of this system is stable and can satisfy production standards of mining in open pits.

关键词： GIS GPS gprs RFID linear programming mining open pit

基于gprs和WEB的温室环境信息采集系统的实现

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农业工程学报 2006年第6期22卷 131-134页

作者：孙忠富曹洪太李洪亮杜克明王迎春苏晓峰蔡田芳刘爽褚金翔中国农业科学院农业环境与可持续发展研究所北京100081 曲阜师范大学自动化研究所曲阜273165

针对农业对象具有的多样性、多变性、以及偏僻分散等特点,提出了一种基于gprs和W EB技术的远程数据采集和信息发布系统方案。首先,通过RS—485总线与数字传感器连接,并与PC监控计算机构成温室现场监控系统;其次,通过gprs无线通讯技术建... 详细信息

针对农业对象具有的多样性、多变性、以及偏僻分散等特点,提出了一种基于gprs和W EB技术的远程数据采集和信息发布系统方案。首先,通过RS—485总线与数字传感器连接,并与PC监控计算机构成温室现场监控系统;其次,通过gprs无线通讯技术建立现场监控系统与互联网的连接,将实时采集信息发送到W EB数据服务器。系统软件核心技术系M S ***和A ***开发而成,构建了基于B/S(B row ser/Server)的“瘦客户”模式,只要通过浏览器不仅可实时浏览监测数据,而且能进行历史数据的查询。该系统的实现为农业网络信息通讯中“最后一公里”瓶颈问题提供了一种便捷的解决方案。

关键词： gprs WEB应用数据采集远程监控温室控制

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基于gprs的电动汽车道路行驶工况自学习

天津大学学报 2010年第4期43卷 283-286页

作者：庄继晖谢辉严英天津大学内燃机燃烧学国家重点实验室天津300072

提出了一种基于gprs的道路行驶工况数据的远程采集方法,并将其应用在电动汽车的实际运行中,获得电动汽车道路试验原始数据库.同时将自组织映射(SOM)神经网络引入到行驶工况的自学习中,通过SOM网络对原始数据进行运动学片段的聚类分析,... 详细信息

提出了一种基于gprs的道路行驶工况数据的远程采集方法,并将其应用在电动汽车的实际运行中,获得电动汽车道路试验原始数据库.同时将自组织映射(SOM)神经网络引入到行驶工况的自学习中,通过SOM网络对原始数据进行运动学片段的聚类分析,构建出了电动汽车在实际运行中的3种典型工况,为电动汽车基于行驶工况的自适应优化控制策略提供了基础环节.所构建的行驶工况和其他行驶工况相比具有一般规律,表明应用SOM网络能够很好地实现道路行驶工况的自学习功能.

关键词：电动汽车行驶工况自学习自组织映射网络 gprs

Automatic gprs Rainfall Detecting Set Based on P89C669

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微计算机信息 2005年第19期 94-96页

作者： (Electronic Engineering Department,Dongguan Uni-versity of technology,Dongguan 523808,China) Yang,Lei Wu,Kun

A new kind of remote and automatic gprs rainfalldetecting network system is established and developed. As themain unit of the network system, automatic rainfall detecting setbased on P89C669 is used to acquire rainfall information auto-matically. gprs station, combined with mobile wireless commu-nication and internet technology is used to achieve the objectiveof dynamically share and display the meteorological informationvia internet.

关键词： P89C552 gprs automatic rainfall detecting sys-tem data acquisition.