Aiming at problems existed in process of parallel compilation for distribution of storage structure in computer system,an exposed-set calculating algorithm to eliminate redundant communication is proposed,which finds exposed-set by analyzing flow dependences and input dependences with array data-flow analysis and self-interfere analysis technologies.

Study on the relationship between redundancy design technique and reliability;

The application of redundancy design in PLC control system;

Necessity of software and hardware redundancy design for microprocessor based protection;

Photoelectric liquid level sensor based on redundant design;

The paper mainly discusses the method of improving the reliability of limiting speed braking for the servo system,briefly analyzes the principle and the common method of safety braking for the servo system,researches the process and rule of limiting speed braking for the servo system,and analyzes the necessity of redundant design for limiting speed braking.

A effective redundant design will be necessary when it is determined that a single component,subsystem or system may not be reliablie enough by the development testing and reliability analysis.

Uniqueness of nonnegative solution toredundant system with several failure states;

Also the reliability of the system and the advantage of the redundant system are analyzed.

Since general situation is that both environment load and component property are random variables,failure dependency is common for most redundant systems.