the advent of computer has revolutionized a variety of fields including education thus paving the way for educational science to enter a new stage. this effect has exhibited itself well in language learning. the development of computer technology and the resulting language learning software, as a reliable tool in the educational system of developed countries, has attracted the attention of both...

The medical information system has been applied in hospitals widely, which makes hospitals acquire notable management benefit and economic benefit. When hospitals enjoy the quick service decision and convenient management because of informationization, they are also in the danger of data loss. Data disaster recovery is the guarantee of the hospital informationization construction, and the base ...

When data disaster happens, the disaster recovery system (DRS) can respond automatically and real-time, and quickly restart the application system in the redundant device to keep the processing of the business. The construction principle of the disaster recovery system has been studied, and combining the base function and national standard of the hospital information system (HIS), the data disa...

The system-level software onboard a spacecraft is responsible for recovery from communication, thermal, power, and computer-health anomalies that may occur. The recovery must occur without disrupting any critical scientiic or engineering activity that is executing at the time of the error. Thus, the error-recovery software may have to execute concurrently with the ongoing acquisition of scienti...

The purpose of this paper is three fold. First, the major theoretical pattern relationships of TV and/or FM transmitting antennas are dealt with. Secend, the computer calculation method and designing of such patterns using the given relationships. And third, a method in which a computer graphic system can be used to design such antennas for a specific pattern is introduced and its results are p...

In recent years, along with rapid developments in technology, computer systems haveincreasingly become more integrated and more modular. Indeed, the reliability and efficiency ofcomputer systems are of high significance. Hence, the quantitative evaluation of the optimizationof reliability indexes in computer systems is considered to be a crucial issue. Reliabilityenhancement of computer systems...

This paper describes the application of static var compensators, (SVC) on an electrical distribution network containing two large synchronous motors, one of which is excited via a three-phase thyristor bridge rectifier. The second machine is excited via a diode bridge rectifier. Based on linear optimization control (LOC), the measurable feedback signals are applied to the control system loops o...

The system-level software onboard a spacecraft is responsible for recovery from communication, power, thermal, and computer-health anomalies that may occur. The recovery must occur without disrupting any critical scientiic or engineering activity that is executing at the time of the error. Thus, the error-recovery software may have to execute concurrently with the ongoing acquisition of scienti...

A Wireless Sensor Network (WSN) is formed by a large quantity of small devices with certain computing power, wireless communication and sensing capabilities. These types of networks have become popular as they have been developed for applications which can carry out a vast quantity of tasks, including home and building monitoring, object tracking, precision agriculture, military applications, d...