This is not a question.
This is The map of the "Hydrogen AND energy" topic.
The research topic map is useful in the following processes
1) orientation in a large thematic area;
2) clarify the future topic of the study, evaluate what will have to be met;
3) draw up a plan and perform a review of the topic;
4) get out of the impasse, generate new hypotheses
file topic_report.docx = 20 topics from 8576 articles which have words
ti=(Hydrogen AND (energ* OR power* ))
in their titles. Each topic is represented through 20 words and 20 thrases with which it is discussed in these articles. Really this terms are the names of methods, objects, properties, laws and so on for topic in question. In addition each topic has quotes from two articles in which it is most manifested.
file a1_basic.xlsm - articles with basic knowledge on the topic
file a3_novelty.xlsm - articles of last years potentially with novelty
Feel free to ask the map of any specific topic.