About ICAMDS2019 2019 4th International Conference on Applied Mathematics and Data Science (ICAMDS2019) (http://www.icamds.com/2019/en/home) is a platform for academic communications between specialists and scholars in the fields of applied mathematics and data science. ICAMDS2019 will be held in Xi'an, China during May 29-31, 2019. Xi'an is the capital of Shaanxi Province, located in the northwest of China. Publication 2019 4th International Conference on Applied Mathematics and Data Science (ICAMDS2019) accepts original and unpublished papers. Both Full paper and Abstract are welcomed. Full papers accepted by the conference will be published online in the following journals of Science Publishing Group (http://www.sciencepublishinggroup.com). The journals have been indexed and abstracted by WorldCat, CrossRef, Electronic Journals Library, CNKI, Zeitschriftendatenbank, EZB, ResearchBib, Polish Scholarly Bibliography, Wissenschaftszentrum Berlin, etc. American Journal of Applied Mathematics (AJAM) http://www.sciencepublishinggroup.com/j/ajam ISSN Print: 2330-0043 ISSN Online: 2330-006X International Journal of Statistical Distributions and Applications (IJSDA) http://www.sciencepublishinggroup.com/j/ijsda ISSN Print: 2472-3487 ISSN Online: 2472-3509 International Journal on Data Science and Technology (IJDST) http://www.sciencepublishinggroup.com/j/ijdst ISSN Print: 2472-2200 ISSN Online: 2472-2235 Science Discovery (SD) http://www.sciencepublishinggroup.com/j/sd ISSN Print: 2331-0642 ISSN Online: 2331-0650