文章针对某炮弹装配兵工厂实时数据管理系统的应用需求,提出了基于工控组态软件MCGS与可编程控制器PLC的数据采集实现。PLC采用西门子S7-300系列,组态软件采用MCGS,通信方式采用工业以太网,数据存储采用ODBC方式,外部数据库采用SQL Serv...文章针对某炮弹装配兵工厂实时数据管理系统的应用需求,提出了基于工控组态软件MCGS与可编程控制器PLC的数据采集实现。PLC采用西门子S7-300系列,组态软件采用MCGS,通信方式采用工业以太网,数据存储采用ODBC方式,外部数据库采用SQL Server 2008数据库。文中详细介绍了组态软件MCGS与PLC之间的通信过程以及数据存储到外部SQL Server2008的具体实现,并且数据可以在生产管理系统中实时的显示。展开更多
文章对工控组态软件MCGS与可编程控制器PLC的数据采集系统做出相应的分析,PLC的中文名称是可编程逻辑控制器,其采用了西门子S7-300系列,组态软件使用的是MCGS系统,本系统是通过工业以太网来进行通信的,用ODBC方式来进行数据的储存,采用...文章对工控组态软件MCGS与可编程控制器PLC的数据采集系统做出相应的分析,PLC的中文名称是可编程逻辑控制器,其采用了西门子S7-300系列,组态软件使用的是MCGS系统,本系统是通过工业以太网来进行通信的,用ODBC方式来进行数据的储存,采用的外部数据库是SQL Server 2008数据库。文章对组态软件MCGS和PLC之间的通信过程和数据储存与外部数据库之间的数据交换方式进行细致的分析。展开更多
It is important and difficult to control the temperature of mass concrete structure during high arch dam construction.A new method with decision support system is presented for temperature control and crack prevention...It is important and difficult to control the temperature of mass concrete structure during high arch dam construction.A new method with decision support system is presented for temperature control and crack prevention.It is a database system with functions of data storage,information inquiry,data analysis,early warning and resource sharing.Monitoring information during construction can be digitized via this system,and the intelligent analysis and dynamic control of concrete temperature can be conducted.This method has been applied in the construction of the Dagangshan Arch Dam in China and has proven to be very convenient.Based on the decision support of this system and the dynamic adjustment of construction measures,the concrete temperature of this project is well-controlled.展开更多
To improve the accuracy of real-time public transport information release system, a collaborative prediction model was proposed based on cyber-physical systems architecture. In the model, the total bus travel time was...To improve the accuracy of real-time public transport information release system, a collaborative prediction model was proposed based on cyber-physical systems architecture. In the model, the total bus travel time was divided into three parts: running time, dwell time and intersection delay time, and the data were divided into three categories of historical data, static data and real-time data. The bus arrival time was obtained by fusion computing the real-time data in perception layer together with historical data and static data in collaborative layer. The validity of the collaborative model was verified by the data of a typical urban bus line in Shanghai, and 1538 sets of data were collected and analyzed from three different perspectives. By comparing the experimental results with the actual results, it is shown that the experimental results are with higher prediction accuracy, and the collaborative prediction model adopted is able to meet the demand for bus arrival prediction.展开更多
This paper formally defines and analyses the new notion of correctness called quasi serializability, and then outlines corresponding concurrency control protocol QDHP for distributed real-time databases. Finally, thro...This paper formally defines and analyses the new notion of correctness called quasi serializability, and then outlines corresponding concurrency control protocol QDHP for distributed real-time databases. Finally, through a series of simulation studies, it shows that using the new concurrency control protocol the performance of distributed real-time databases can be much improved.展开更多
Pipeline network of oil fi eld water is established on the basis of GIS geographic information and SCADA platform, and monitorthe running state of water supply system in oil fi eld mining area in real time through dat...Pipeline network of oil fi eld water is established on the basis of GIS geographic information and SCADA platform, and monitorthe running state of water supply system in oil fi eld mining area in real time through data acquisition, instrument measurement and control,wireless network, water quantity, water pressure and other on-line monitoring equipment. The water supply system is formed, and the informationof mass water supply system is analyzed and processed in a timely manner. The system manages the entire production, management and serviceprocesses of the water supply system in a dynamic manner in order to ensure water supply safety management, and realize the modernization,intelligence and information mode operation of the water supply system in the mining area.展开更多
Introduced a Web-based real-time network monitoring and control system design methods, the 3-D VR was applied in a remote monitor system based on browser/server structure, and a VRML and Java based 3-D remote monitor ...Introduced a Web-based real-time network monitoring and control system design methods, the 3-D VR was applied in a remote monitor system based on browser/server structure, and a VRML and Java based 3-D remote monitor system was realized. Meanwhile, give possible solutions of the real-time data transmission and the stability of the system.展开更多
文摘文章针对某炮弹装配兵工厂实时数据管理系统的应用需求,提出了基于工控组态软件MCGS与可编程控制器PLC的数据采集实现。PLC采用西门子S7-300系列,组态软件采用MCGS,通信方式采用工业以太网,数据存储采用ODBC方式,外部数据库采用SQL Server 2008数据库。文中详细介绍了组态软件MCGS与PLC之间的通信过程以及数据存储到外部SQL Server2008的具体实现,并且数据可以在生产管理系统中实时的显示。
文摘文章对工控组态软件MCGS与可编程控制器PLC的数据采集系统做出相应的分析,PLC的中文名称是可编程逻辑控制器,其采用了西门子S7-300系列,组态软件使用的是MCGS系统,本系统是通过工业以太网来进行通信的,用ODBC方式来进行数据的储存,采用的外部数据库是SQL Server 2008数据库。文章对组态软件MCGS和PLC之间的通信过程和数据储存与外部数据库之间的数据交换方式进行细致的分析。
基金Supported by the National Natural Science Foundation of China(No.50909078)the National Basic Research Program of China("973"Program,No.2013CB035900)
文摘It is important and difficult to control the temperature of mass concrete structure during high arch dam construction.A new method with decision support system is presented for temperature control and crack prevention.It is a database system with functions of data storage,information inquiry,data analysis,early warning and resource sharing.Monitoring information during construction can be digitized via this system,and the intelligent analysis and dynamic control of concrete temperature can be conducted.This method has been applied in the construction of the Dagangshan Arch Dam in China and has proven to be very convenient.Based on the decision support of this system and the dynamic adjustment of construction measures,the concrete temperature of this project is well-controlled.
基金Project(2011AA010101) supported by the National High Technology Research and Development Program of China
文摘To improve the accuracy of real-time public transport information release system, a collaborative prediction model was proposed based on cyber-physical systems architecture. In the model, the total bus travel time was divided into three parts: running time, dwell time and intersection delay time, and the data were divided into three categories of historical data, static data and real-time data. The bus arrival time was obtained by fusion computing the real-time data in perception layer together with historical data and static data in collaborative layer. The validity of the collaborative model was verified by the data of a typical urban bus line in Shanghai, and 1538 sets of data were collected and analyzed from three different perspectives. By comparing the experimental results with the actual results, it is shown that the experimental results are with higher prediction accuracy, and the collaborative prediction model adopted is able to meet the demand for bus arrival prediction.
基金the National Natural Science Foundation of China and the Commission of Science,Technokgy and Industry for National Defense
文摘This paper formally defines and analyses the new notion of correctness called quasi serializability, and then outlines corresponding concurrency control protocol QDHP for distributed real-time databases. Finally, through a series of simulation studies, it shows that using the new concurrency control protocol the performance of distributed real-time databases can be much improved.
文摘Pipeline network of oil fi eld water is established on the basis of GIS geographic information and SCADA platform, and monitorthe running state of water supply system in oil fi eld mining area in real time through data acquisition, instrument measurement and control,wireless network, water quantity, water pressure and other on-line monitoring equipment. The water supply system is formed, and the informationof mass water supply system is analyzed and processed in a timely manner. The system manages the entire production, management and serviceprocesses of the water supply system in a dynamic manner in order to ensure water supply safety management, and realize the modernization,intelligence and information mode operation of the water supply system in the mining area.
文摘Introduced a Web-based real-time network monitoring and control system design methods, the 3-D VR was applied in a remote monitor system based on browser/server structure, and a VRML and Java based 3-D remote monitor system was realized. Meanwhile, give possible solutions of the real-time data transmission and the stability of the system.
