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Firstly, the system of systems (SoS) engineering process model of national major science and technology projects is constructed, including two levels and three stages. Secondly, the hierarchical structure of national major science and technology projects is analyzed, and the risks are divided into different levels, such as SoS, system, subsystem, equipment, module, and components. Finally, we describe the risk transfer mechanism using the forest-fire model and outline a risk control strategy. The results show that the findings are helpful for recognizing the essence and transmission mechanism of technical risks of national major science and technology projects and for reducing the risk from the source. The research results can be applied to project management in the transportation field.<\/jats:p>","DOI":"10.3233\/jifs-189995","type":"journal-article","created":{"date-parts":[[2021,5,18]],"date-time":"2021-05-18T13:40:37Z","timestamp":1621345237000},"page":"5099-5105","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["A forest-fire model for technology risk transfer"],"prefix":"10.1177","volume":"41","author":[{"given":"Zhifeng","family":"Wu","sequence":"first","affiliation":[{"name":"China Academy of Electronics and Information Technology, Beijing, China"},{"name":"Beijing Jiaotong University, Beijing, China"}]},{"given":"Yisheng","family":"Liu","sequence":"additional","affiliation":[{"name":"Beijing Jiaotong University, Beijing, China"}]}],"member":"179","published-online":{"date-parts":[[2021,5,14]]},"reference":[{"key":"e_1_3_1_2_2","doi-asserted-by":"publisher","DOI":"10.1108\/BIJ-06-2017-0151"},{"key":"e_1_3_1_3_2","doi-asserted-by":"publisher","DOI":"10.1061\/(ASCE)0733-9364(2005)131:9(963)"},{"key":"e_1_3_1_4_2","doi-asserted-by":"publisher","DOI":"10.1080\/01446190500435275"},{"key":"e_1_3_1_5_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.281.5384.1840"},{"key":"e_1_3_1_6_2","unstructured":"LiuB. and SunF.H. 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