Performance analysis and research of evaluation of failure detection;

Failure detection provides the ability of timely detecting the liveliness of runtime systems and is the basic reliability technol- ogy in distributed systems.

It implemented automatic service switching by efficient failure detection algorithm.

This paper describes the implementation of fault detection in a middleware product conforming to the faulttolerant CORBA Specification 1.

Designing and proving the repliation manager and fault detection is the core mission in this paper, the repliation manager administrated replications by object group.

Fast Asynchronous Consensus Algorithm Based on Failure Detector;

Studying the effects of message delays and losses to the quality of service of failure detector, a new adaptive failure detector which is more adaptive to changes in network is designed.

The paper researches the failure detection methods based on the Web service composition,designs the primary-slave failure detector,analyses a failure detection algorithm,and then provides effective means to Web service composition monitoring.

This thesis presents a new algorithm on the detection and orientation of vehicle license plate based on planar and binary wavelet, integrated with many other im age processing methods.