Next, introduces 0-1 ILP method and Net Present Value Index method to fix portfolio (business combination). Business selecting involves ’core competence’ and ’related diversification’, so the relations between the two are discussed.

接着，引入0-1规划数学模型与技术经济学净现值指数法进行业务组合选择；因业务筛选涉及核心能力与相关多元化，故同时讨论二者关系，阐明若方向不悖，其他条件相近，企业应尽可能选取以核心能力为基础的相关多元化经营。

Especially since the 90s, the Internet technology and traditional business combination gave birth to a new economic form, that is, e-commerce.

随着社会的进步,互联网技术与传统商务完美融合在一起并催生了一种全新的经济形态,即电子商务。