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As for the graphical modeling software of current domestic power system, it used mostly to be the stand-alone edition or based on C/S (client-server) mode. Compared with the B/S (browser/server) mode, there are some shortcomings in software installation, upgrade and maintenance. This paper aims at developing the graphical modeling software of power system, which is based on the B/S mode, making most...
ECG signals received from a long distance call through mobile phone network need to be displayed instantaneously, smoothly and recorded. Due to non-uniform load and inherent time delay in the network the real-time display is incoherent. This will cause some discomfort or inaccuracies in observing the waveform at the critical moment, and then more or less affect the quality of work performed by the...
Java is a programming technology which has been extended in order to provide the timeliness required by real-time systems (e.g., RTSJ). There are two RTSJ-based profiles: DRTSJ supporting distributed real-time Java systems and SCJS supporting the development of programs that must be certified. However neither of them considers dynamics characteristics allowing the system to be adapted to the changing...
This paper is concerned with the design procedures of an automated testing tool, developed in Matlab®/Simulink® environment, that performs software verification during runtime on a PLC (Programmable Logic Controller) or so called HiL test (Hardware-in-the-Loop) for model-based development of control applications. In addition to checking the “semantic” or “functional” correctness of the automatically...
Today, digital type power system simulators are used within many areas of development including protection system test, in respect of its excellent track record. However, in the protective relaying system test, the operation of the test system becomes complex because numerous power system parameters and switching conditions need to be set following a predetermined sequence. And professional power...
This paper researches on IMS multimedia sharing service modes. Multimedia sharing service allows service users to share multimedia in a variety of multimedia sharing modes with one or more IMS multimedia sharing service users through IMS multimedia service system (but not limited to) using an IMS multimedia sharing client. This paper concretely studies and designs the functions and service flows for...
A design of integrated monitoring software for understanding the detailed status of applications and hardware devices in a short period of time is proposed. Data models for real-time data and system configurations for easier associations between the real-time data are also proposed. To verify the effec-tivity of the proposed integrated monitoring software, surveys on the operations managers using...
To solve the problems of poor stability and real-time capability of the current substation RTU monitoring system, the RTU monitoring system based on GPRS and PLC was designed. PLC has the characteristics of powerful function, easy operation and strong reliability, so its application can cover almost all areas of industrial control. In order to know all the equipments' realtime running and alarm information...
Functions and features of configuration software are introduced. They are discussed in details the design project, function and realization of real-time monitoring water supply system in configuration software and the result is given. The project has been in use in water supply system of Xi'an Xianyang International Airport. It indicates by operation that the design project is practical and stable.
Cyber Physical Systems (CPS) comprise the integration of embedded computer systems and the physical processes that these computer systems interact with. Examples of such systems stretch from small embedded devices, e.g., intelligent sensor systems, to larger and often complex industrial systems, e.g., industrial automation systems. These systems are not only subject to functional requirements, but...
This paper mainly deals with the data exchange by DDE technology between the higher engine system and site equipment. The system reads the data to Excel with realtime reports, or stores data to Access database, then generates history reports in flexible way with different inquire conditions. The role of communications protocol in monitoring and other applications is briefly introduced. By using VB...
In this paper, the current status of port informatization has been analyzed, and the concept, basic properties and characteristics of the cloud computing have been introduced, on which ground we present a port information system based on cloud computing. The framework and functions of the system have also been introduced.
In real-time software systems, meeting deadlines is crucial. Software engineers face many challenges to model the object-oriented software system to handle complex real-time constraints. The accurate estimating of the performance time is a key criterion for a precise scheduling decision. This paper presents an object-oriented performance model that analyzes the behavior of the real-time objects' tasks...
In 2005, thousands of wild birds around the Qinghai Lake died of avian influenza virus. Following the incident, Computer Network Information Center (CNIC) of China Academy of Sciences and several other research institutions as well as the local natural reserve administration took actions to study it from different aspects and at different levels. With the launching of CNGI project around the Qinghai...
Distributed architecture is a fundamental way for science and engineering data application by aggregate power of computing resources connected by networks of the grid. This paper describes a innovative scenarios for intensive rainfall data analysis. The Flood Early Warning System is performed to give an alert in advance about the occurrence of heavy rainfalls around the world. The aim of the project...
In order to adapt to the trend of visualization of satellite mission, building a real time visual simulation platform is needed. Based on Satellite Tool Kit (STK) and MATLAB / SIMULINK, the Displayer Terminal written by VC++ through the use of STK / Connect interface technology and STK / X embedded technology was build, as well as the real time satellite mission analysis simulation model which was...
A design scheme of remote model predictive control system is presented in this paper. Combined with the asynchronous messaging framework Errai, a network application system for remote model predictive control, which is based on GWT architecture, is developed and implemented by using RIA technique. The application field of MPC product is extended and the application function is expanded effectively...
The “Reading Area Transport Information Network” project has been focused on the delivery of an enhanced unified communications network for Reading Borough Council using WiMax/Wi-Fi and on the use of the latest 3G communication capability to better deliver existing transport services and to provide a platform for the delivery of enhanced services in the future. The in-vehicle navigation sub-project...
A virtual on-board concurrent user based remote monitoring system stress testing method is proposed. First, the scenario of maximum concurrent users is obtained through system analysis and the method is proposed. Second, the virtual on-board concurrent users are realized by computer data generation and coding according to package protocol. Finally, a case study of stress testing is done. It is turned...
In this paper, we design and implement a reliable data processing and analysis test bed (NESCTB) for wireless sensor networks (WSNs). It contains 36 wireless sensor nodes connected through Ethernet to a central server so that, with web interface, remote users are able to schedule tasks and monitor the nodes' operations online. In addition, reprogramming and data logging can also be provided via the...
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