| The issues of living and development of small and medium-sized businesses are attracting the attentions of the countries all around the world. The researches on small and medium sized businesses have become the hot points.Small and medium-sized businesses, which have promoted the development of the social economy together with the large sized businesses, are vital component of the economy. Many countries or districts have constituted laws, rules or policies to encourage and support the development of small and medium-sized businesses. So small and medium-sized businesses have grown up rapidly and become crucial for sustaining the increase of the economy.Small and medium-sized businesses are large in number and distribute in different economic areas. They promote the development of the economy and are contributing more and more to the increase of the economy.Small and medium-sized businesses require for few investments and can be operated more flexibly. The same amount of the capital in small and medium sized businesses can hold more labors, for these businesses have low technical demands to labors. Small and medium-sized businesses have become one of the main channels to solve the unemployment and provide jobs to new labors.Small and medium-sized businesses act the vital roles in technology innovation. Neither the amount nor the level nor the influence of the technology innovations from small and medium-sized businesses is less than that from the large. In recent years, a lot of small and medium-sized businesses have turned technology intensive and showed advantages in many industries obviously. Meanwhile, small and medium-sized businesses have improved their images because of technology innovations and got development from that.Being sensitive to the market, small and medium-sized businesses can meet the demands of the diversified and individuated market. They have composed of indispensable forces for activating the market.In the market economy, small and medium-sized businesses depend on the large ones to stabilize the market and provide the large ones with accessories, parts and services before, during and after the production. They have got best from each other. Different sizes of businesses can improve their competitive advantages through establishing reasonable structure with each other, setting up synergic unions, realizing socialized cooperation and professional manufacture.With the development of the market economy in China, small and medium-sized businesses are to play more and more important roles in guaranteeing the continuous, fast and healthy development of the national economy and in maintaining the social stability.The living and development of small and medium-sized businesses refer to many issues, such as financing, innovation mode, management strategy, project management, technology innovation, marketing strategy, industrial positioning, international management, financial management, setting up strategy, managing mode, withdrawing strategy, services system, correlated policies, etc.There are a lot of researches about small and medium-sized businesses. The researches are not only broad, but also deeply. Most of the researches in the documents concerned are qualitative. The quantitative researches are not enough.The author has taken part in the research of "study on the living base, increasing mode and continuous development of the Chinese small and medium sized businesses " , which is the project of the national fund of the natural science. Combining the specialty, the author has made qualitative and quantitative research on the main issues of living and development of small and medium-sized businesses through systematic analysis and control methodology, and raised the frame of problem solving and the models concerned.The dissertation has discussed the following issues:Chapter II, the author defined small and medium-sized business. The author has defined the meaning of small and medium-sized business. This is the base of the study in the dissertation. The dissertation has introduced the defining standards of different countries, expounded the position, functions and characteristics of small and medium sized businesses, and reviewed the states and the development of Chinese small and medium-sized businesses.Chapter III, theory foundations of living and development of small and medium-sized businesses. Integrating kinds of related theories at home and abroad, the author has reduced these theories to three areas: theories of living of small and medium sized businesses, theories of development of small and medium-sized businesses, and the models of the growing phases of small and medium-sized businesses. It is helpful for this dissertation to make further analysis and researches clearer at frame.Chapter IV, the author discussed the fuzzy comprehensive evaluation of the living basis of small and medium-sized businesses. Based on the former research results in the project of the national fund of the natural science, the author has not only established an index system of the fuzzy comprehensive evaluation of the living basis of small and medium-sized businesses, but also designed the arithmetic of the fuzzy comprehensive evaluation.Chapter V, the fuzzy conjunction analysis of the living basis and the management achievements of small and medium-sized businesses. Based on the research results in chapter IV, the author has designed the frame of the index system and the evaluating standards of the management achievements of small and medium-sized businesses in chapter V. Further more, the author set up the model of fuzzy conjunction analysis of the conditions of the living basis and the management achievements of small and medium-sized businesses. Chapter VI, the strategy of the core competence of small and medium-sized businesses. The author analyzed the meaning and the features of the core competence and the factors that affect the core competence of small and medium-sized businesses, and discussed the way to identify and train the core competence for small and medium sized businesses.Chapter VII, innovation strategy of small and medium-sized businesses. The author reviewed related theories of the innovation strategy, then the author analyzed the types and characteristics of the innovations and brought out a new method to identify the innovation types of small and medium-sized businesses through fuzzy identifying mode, which is practical.Chapter VIII, cluster strategy of small and medium-sized businesses. Cluster of small and medium sized businesses is drawing more and more attentions of the world. Cluster is the main way for the small and medium- sized businesses to live. The industrial distributions of the countries have provided strong proofs for the theory of cluster.In this chapter, the author has introduced typical theories of cluster, including basic concepts and classification. The author analyzed typical cases of cluster of small and medium-sized businesses, and discussed the mechanism of cluster quantitatively.Chapter IX, the strategy of symbiosis of small and medium-sized businesses with the large sized ones. At the first of the chapter, the author introduced the concept of the theory and the mode of symbiosis, and described the feature indexes of the symbiosis unit quantitatively. The author also analyzed the basic principles of the forming of the symbiosis, the states and mechanisms of the symbiosis of small and medium-sized businesses with the large sized ones. Secondly, the author analyzed quantitatively the symbiosis relationships of small, medium and large-sized businesses and compared the symbiosis modes of the small and medium-sized businesses with that of the large. At the end of the chapter, the author also discussed the optimization of the symbiosis modes of different sized businesses and concluded that the object of symbiosis is to establish a continuous symbiotic community in that different sizes of businesses are symmetric mutual benefit to each other. The author also put forward the way of optimization for symbiosis modes.Chapter X, the model of harmonious development for small and medium-sized businesses within the living surroundings. More and more businesses have realized that the surroundings of living and development are necessary to sustainable development. Small and medium-sized businesses have to seek bi-directional coordination with the surroundings. The author has discussed the mathematic model systems of bi-directional control between the surroundings and the economy for small and medium sized business. Starting from the basic construction, the author has mainly studied the model of economic analysis at the lowest level (the first level), the model of the bi-directional coordination and control between the surroundings and the economy at the middle level (the second level), and the index model of coordinative development between the surroundings and the economy at the highest level (third level). These models are not only meaningful for theory, but also practical.Focused on the main issues of living and developments of small and medium-sized business, the author made some deeply discussion and study on these issues through general systematic theory and control theory. This dissertation is meaningful at theory and can also provide practical guidance.The main innovations of the dissertation are as follows:First, the author discussed the fuzzy comprehensive evaluation of the living basis of small and medium-sized businesses. The author has not only established an index system of fuzzy comprehensive evaluation of the living basis of small and medium-sized businesses, but also designed the arithmetic of the fuzzy comprehensive evaluation.Second, the author designed the frame of the index system and the evaluating standards of the management achievements of small and medium-sized businesses. Further more, the author set up the model of fuzzy conjunction analysis of the conditions of the living basis and the management achievements of small and medium-sized businesses, this index system and the model is practical.Third, the author has analyzed the types and characteristics of the innovations and brought out a new method to identify the innovation types of small and medium-sized businesses through fuzzy identifying mode, which is practical.Fourth, the author analyzed the meaning and the features of the core competence and the factors that affect the core competence of small and medium-sized businesses, discussed the way to identify and train the core competence for small and medium sized businesses. Based on the former research, the author designed the frame of the index system of evaluating core competence.
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