According to the effects of natural elements on the origin of human natural emotions and modern human settlements, natural elements can be divided into core elements and surrounding elements, the space of human settlements can be divided into core space and surrounding space.

The different enterprises have the different entrepreneurship level,because the characters of organization structure have influence on the enterprises entrepreneurial core elements,then affects the entrepreneurship behaviors.

The article attempts to establish a core elements model for the state-owned enterprises entrepreneurship during the transition periods,which includes three components: opportunity,entrepreneurial competence and entrepreneurial culture.

The key to write a good lead is what elements to choose and decide as the central elements.

Started from the concept and factor of library knowledge management,this paper indicated that the librarian was the core factor of library knowledge management and the key of library knowledge management\' success and failure.

Characters of core and its applications to decision tree;

Essentially,the core element of agricultural feminization and aging is the population feminization and aging of on-farm workers.

The fundamental method to define the logic starting point is to analyze the objects of academic research and to define its core elements.

The paper principally expounds the study on core elements and conditions in Nanjing creation, at the same time, it discusses the relationship between the core elements in creative activities.