Abstract: The subject invention pertains to a geo-analysis model that can calculate geographical indicators in the real world based on specific calculation methods and computer programs. The operation of the geo-analysis model can help users understand the operational rules of the real world and predict the future, providing decision support for concerned members. A geo-analysis model componentized presenter enables the geo-analysis model to be presented in the form of assembled components, as well as abstract digital, theoretical, or academic constructs, or physical objects, to help users understand and use the model.

Abstract: The present invention provides a novel virus-like particle expression vector pTMSCA2C, which is constructed as follows: firstly, using plasmid pTrcHis-MS2 as a starting vector and mutating the base T at position 5 of the gene sequence of MS2 bacteriophage 19mer packaging site on the plasmid pTrcHis-MS2 into C through genetic mutation technologies to obtain a plasmid pTMSC; then, mutating valine which is a amino acid corresponding to the initiation codon on the plasmid pTMSC for encoding the maturase protein of MS2 bacteriophage into methionine to obtain a plasmid pTMSCA; and finally, the gene sequence coding wild type MS2 bacteriophage coat protein, after the removal of the terminator, is linked in series with the gene sequence coding MS2 bacteriophage coat protein comprising histidine-tag which is from a pseudovirus vector pTrcMS, and the gene sequence obtained after linking in series is linked to the plasmid pTMSCA to give pTMSCA2C.