Firstly, according to the number of data items of requests and the process of repeated access for data items, some multi-item requests are found out.

This paper highlights the relationship between maritime liens and the persons against whom the maritime claims secured by maritime liens are made.

The paper makes a comparative study of the maritime claim, the exercise of right of arrest, the security of the value of the ship and the jurisdiction between 1999 International Convention on Arrest of Ship and the legal system of arrest of ship in China, and raises some suggestions on the improvement of legislation and execution on arrest of ship in China.

Application for the vessel s arrest may be in the basis of two kinds of maritime claims, which are the maritime claims secured by maritime lien or other bail, and the maritime claims without such .

Arrest of a ship means any detention or restriction on removal of the ship by order of a court to secure a maritime claim, which is one of important means to protect maritime claimant s legitimate rights and interests, and is the main content of preservation of maritime claims.

This design is made for an embedded system and has been successfully implemented In the scheme, the interface functions first accept the request task, then the execution level function which runs as a thread sends out request message and receives and parses response message.

A prediction based algorithm for dynamic load balancing is proposed, which is capable of predicting the time for a node to reach the idle state based on the local loading information and issuing a task request before this so as to ensure that all nodes in the system will remain busy to enhance the utilization rate of the system resources and the overall system performance.