文档介绍：-------------by Zhang Chen and Li Yapeng CONTENTS ? What is the abstract ? Why do we need to write a abstract ? How to write a good abstract ? Problems that may be encountered in writing an abstract What is the abstract What is the abstract why do we need to write an abstract We always read a paper in this order: A good abstract makes people understand the main idea of the paper. Of course, a nice abstract can raise people ’ s interests in reading the whole paper. why do we need to write an abstract ? Some data libraries only provide the abstract of papers, so writing a brief and independent abstract is necessary. By reading your abstract, people can get your idea instantly. Abstract is written after you finish the whole research, to some degree, it ’ s a summary of your work. ? When you submit a paper, other parts in Chinese, however, English abstract is necessary. How to write a good abstract ? Title: Development of the unpowered diving and floating prediction system for deep manned submersible "JIAOLONG “? Abstract: In this 5,000m depth class sea trials test of the JIAOLONG deep manned submer- sible,dive has realized the fully unpowered From the perspective of the content ? diving and floating condition and this set of test data provide a valuable source for model improve- ment. In this paper, this set of test data is analysed in detail and the previous analytical model is im- proved through the introduction of a variable vo- lume compressed rate for the deep manned sub- mersible during the whole process of diving and floating. puter software is developed for the prediction of the unpowered diving and floating movement. This could lay a good foundation for the 7 000m sea trials planned in 2012 and for the future applications. The information in an Abstract is condensed because of the summarizing nature. There is no spare information in an abstract. ? One or two sentences to introduce the topic and background of your