Title specification Title should be concise, specific and accurate, which can summarize the specific content of the paper, help to select keywords, and conform to the relevant principles of compiling title catalogue, index and retrieval. Matters needing attention in writing English titles by propositional method English titles mainly appear in the form of phrases, especially noun phrases, that is, titles are basically composed of one or several nouns plus their prepositions and/or post-modifiers. The title of phrase type should determine the head word and then modify it before and after. The order of each word is very important, and improper word order will lead to inaccurate expression. Generally don't use declarative sentences, because the title mainly plays a marking role, and declarative sentences are easy to make the title have judgmental semantics, which is not refined and eye-catching. In a few cases, interrogative sentences can be used as titles in critical, comprehensive and refuting situations, because interrogative sentences have exploratory tone and are easy to arouse readers' interest. The English title and Chinese title of the same paper should be consistent in content, but it does not mean that the text should correspond. In many cases, individual non-material words can be omitted or changed. Foreign sci-tech journals generally have restrictions on the number of words in titles, and some stipulate that titles should not exceed 2 lines, and each line should not exceed 42 printed symbols and spaces.

Some require that the title should not exceed 14 words. These regulations can be used for our reference. In the English title of the paper. Don't use anything that can or can't be used.