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Enterprise competitiveness is the direct embodiment of enterprise advantage. The enterprises show different leading advantage element structure in different developing phases. The enterprise competitiveness can't be improved without enhancing the leading advantage. To get constant improvement of enterprise competitiveness, the enterprise leading advantage element structure must be transformed and improved in time. Based on this theory, this article established steel and iron enterprise competitiveness evaluation index system with 6 aspects including resources competitiveness, scale competitiveness, environment competitiveness, cooperation competitiveness, innovation competitiveness and brand competitiveness. Using in Hebei Province as analysis and research object, Comparing and researching enterprise competitiveness horizontally of 16 steel and iron enterprises in 2008 including Tangshan Iron and Steel Group Co., Ltd with principal component analysis method, and analyzing that enterprise competitiveness deeply on that basis.

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As a special form of spatial organization, industry cluster has showed extraordinary vitality in the regional economy, which aroused the concern of many experts and scholars in various fields. At the same time, innovation network can generate sustainable cluster innovating advantages since it is a main innovative platform related to industry cluster. Through the exploration of the relationship between innovation network and competitiveness of industry cluster, this thesis attempts to build a new evaluation system of industry cluster competitiveness from the perspective of innovation network, and thus provides a theoretical basis and methods for promoting competitiveness of industry cluster. Iron and steel industry cluster innovation network is a integrated and complex network system consisting of organization network, production network, cycle network, research network and social network. Moreover, with the different formation and development stages of Iron and steel industry cluster, the dominant elements in its internal network would follow the evolution of organization network production network cycle network R & D network social network. And as it develops into the latter stages, its innovation network will show more obvious advantages, resulting in the differentiation of source and strength of the iron and steel industry cluster competitiveness. Based on the above basic ideas, this thesis establishes an evaluation index system of the iron and steel industry cluster competitiveness consisting of 5 aspects, 4 levels, and 39 specific elements. Taking Tangshan Iron and steel industry cluster for example, adopting the method of principal component analysis, the dynamic evaluation research of the competitiveness of the object in 1999 to 2008 is carried out. And according to the result, competitiveness of cluster and cluster evolution trend is analyses.