正确写作美国大学生学建模竞赛论文..ppt

正确写作美国大学生数学建模竞赛论文 Sudoku (Japanese: sūdoku) is derived from Switzerland, developed in America and carried forward in Japan. It is a simple game of logic and so easy to learn. It is also a fun and addictive game and is puzzling millions of players all over the world. Many people like it. Partial people began to study solving the puzzles by computer. However, generating Sudoku puzzles is even more difficult when difficulty levels and a unique solution both are considered. It is also the task we are required to finish. The aim is to create a reliable sudoku algorithm which has least complexity and a unique solution should be guaranteed. Difficulty levels are greatly depended on the metrics developed. The basic thought is that we delete digits from a solved puzzle, and then check out if there is a unique solution. Develop a series of metrics to define the the difficulty levels. Judge its difficulty level utilizing metrics. Metrics are very important in the whole course of constructing puzzles. In our paper, we develop metrics fit for persons’ thought and metrics aimed at computers’ “thought” respectively. The former is subjective and the latter is impersonal. 3、示例：如何修改引言 1）、Sudoku (Japanese: sūdoku) is derived from Switzerland, developed in America and carried forward in Japan. 这个句子读起来很上口，但句子的动词排比却不一致： is derived， developed，carried forward 这三个动词的句式结构都不相同。 而且，“is derived from Switzerland”的意思是数独游戏是从瑞士这个国家转变而来的，用“originated in”会更加准确。 应改为：Sudoku, originated in Switzerland, was developed in America and popularized in Japan. 3、示例：如何修改引言 2）、 It is a simple game of logic and so easy to learn. 这句话中的“so easy”是习惯用语，与“very easy”同义。作者也许是想用so来表示后半句话是前半句话的结论，用“hence easy to learn” 或“so it is easy to learn”更能清楚地表达这层逻辑关系。 3）、It is also a fun and addictive game and is puzzling millions of players all over the world. Many people like it. 前面的句子和这个句子都是以“It is …”开头，读起来很强调。此外，既然这是一个很有趣的游戏，并有数以百万计的人玩过，因此可以假设很多人都喜欢这个游戏，所有最后一句话是多余的。 故改为： It