The text analyses the reliability of the temperature automatic control system of cooling water in ships diesel engine,and by computing the reliability of all the system and the sub-system,we can conclude the improved way of this system,at the same time it puts forward that simple parallel reservoir of system is the useful way of improving reliability.

In order to reduce the execution time for storage backup tasks and improve the performance for the whole storage system, we present a new SAN(Storage Area Networks) architecture by introducing the cluster technique into traditional SAN architecture, building a mathematical model of related backup task and describing its kernel algorithm.

For the sub-6-degree of freedom(DOF)parallel kinematic machines(PKM),it is necessary to separate the geometric error sources which influence the compensable and uncompensable errors of the mobile platform by error modeling,so as to supervise the accuracy design and kinematics calibration.