针对此问题，提出书业企业要与出版社建立战略协同关系，与下游书店建立信息沟通渠道。
For this the books enterprise must establish good strategic agreeable relationship and set up the communication way with the lower enterprise, at the same time.
接着，分别建立起并购上、下游企业的最优战略模型，并且给出了提高能量效率的充分条件；
Secondly, it sets up the models which discuss optimal strategy for merging an upstream firm and a downstream firm, respectively, and gives the sufficient conditions for increasing energy efficiency.
提出通过战略联盟和提升企业的核心竞争力来稳定下游链的建议。
Proposes the suggestion which stabilizes downstream supply chain through the strategic alliance and promoting enterprise's core competitive power.
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