This paper analyzes the market demands,development circumstances and construction patterns of cruises,summarizes key technical problems in design of cruise center,and puts forward suggestions on the construction of cruise center in China.

The article analyses the present development situation of Shanghai cruise traveling,and explains the existing problems in the development of Shanghai cruise traveling from the superiority and the inferiority angle.

The article analyses the present development situation of Shanghai cruise traveling,and explains the existing problems in the development of Shanghai cruise traveling from the superiority and the inferiority angle,which has from the development of Shanghai cruise traveling at present.

Characteristics of large gears and o n -line measurement;

The method of on-machine measuring large gear with the rack-head is put forward.

Based on the theory of the rolling friction transmission, the principle and techniques of obtaining an accurate angle between friction discs in on-machine measuring large gears are studied.

Analysis and Calculating Method of Casting Spoke Cracks of a Heavy Gear;

This paper is a part of the research project-the real time simulation study of fuel boiler system and cargo oil load and unload system of the large oil tanker, which is sponsored by Shanghai Education Committee.

This dissertation is a part of the research project-the real time simulation study of fuel boiler system and cargo oil loading and unloading system of the large oil tanker, which is sponsored by Shanghai Education Committee.

And the technology of big gears’high precise measurement has been greatly needed to improve.