The Study On Stability Of Symbiosis System In Marine Equipment Industry

Shipbuilding industry is one of the strategic industries, which affects national security and economic development, and also promotes the upgrading of the industrial structure. China's current shipbuilding capacity is the third among the world, only behind Japan and South Korea, however, the development of China's ship equipment manufacturing industry lags far behind that of shipbuilding industry, which leads the latter to the verge of a "hull industry". China's localization rate of shipping equipment is around 40%, which means a mass of equipment need to be imported, therefore, the profitability and continuous development are seriously hampered.The character of marine equipment industry matches the condition of cluster-oriented development; meanwhile, the industry performs the typical characteristics of the symbiosis, namely, enterprises in marine equipment industry can improve their economic benefit and competitiveness through cooperation, and meanwhile realize resource conservation and environmental protection. However, it is necessary to scientifically follow the objective and economic laws due to the defects of fragile stability of industry symbiotic system, in order to maintain its long-term stability. The paper systematically researches the stability of symbiotic system of marine equipment industry, and thoroughly probe into the conditions and factors of stability, for the sake of providing theoretical guidance for enterprises to reasonably select symbiotic models, and also supplying planners and policy makers of marine equipment industrial park with useful reference.The paper bases on the on-spot investigation and experts interviews, absorbs the latest theoretical results by documentary analysis, adopts the ecological and economic methods, such as symbiotic theory, Logistic growth model and Shapley value in n-person cooperative game to demonstrate the static and dynamic stability of symbiotic system of marine equipment industry, and finally tests the theory with reality of Dalian marine equipment industry as a case study. It can be led to the conclusion that the realization of stability requires the reasonable number of similar enterprises and heterogeneous enterprises, the symmetrical profit distribution mode with consistently incentive function, the diversified operations to expand product variety, enhance their viability, and ultimately enhance the ability to resist risks. In addition, the government supports, adequate supply of technology, cultivation of key enterprises play an important role in maintaining the stability. The strategy for Dalian's marine equipment industry development includes establishing the just and equal symbiotic mechanism, cultivating and introducing the key equipment companies, constructing the base for innovation of industrial common technology, exerting the coordination role of industrial association, establishing the complete network of services, encouraging the diversified business, enhancing the government supports, improving the innovation capacity, cultivating key enterprises and so on.