Base on the theory of decision-making, we study the system fuzzy decision-making model, the NN model, and the synthesis evaluation model based on non-linear programming and weigh. We build the combination investment model based on multi-goals integer programming, discuss the scale of venture capital, joint investment and investment strategy of maximum utility.
however, government investment, social strength investment, joint investment of government and social strength, foreign investment, joint investment of foreigner and Chinese, have come into the plural construction of investment subject in the market economy.
Based on the nature of venture capital and the theory of incomplete contract, this paper analyses and demonstrates the characteristics of the contract between entrepreneur and venture investors in terms of financing time limit, financing rounds, joint investment, monitoring strength, securities designing during the financing process of hi-tech enterprises.
From the point of economy,this paper discusses the internal mathematics mechanism of win-win by the share of profit and risk in united investment,then analyzes four actual meanings,and discuses the status quo of united investment and the possible risk of united investment in our country.