Abstract. E-commerce is through the computer network of the business activities, the high-speed channel for all types of businesses to establish the exchange of information, allowing users to at a high speed, low cost, high efficiency, the momentary grasp opportunities, the first to obtain competitive conditions. As a new form of trade, the arrival of e-commerce to the development of our economy provide new opportunities through the Internet and e-commerce technology, a breakthrough time and space constraints, allowing users to conduct business anytime, anywhere, and therefore to the traditional financial accounting systems bring strong shock. This article will give a detailed analysis of the impact of e-commerce development has brought financial accounting.

The problem of H∞-control based on the output feedback for fuzzy singular system was studied. With an equivalent system constructed, the analysis of H∞-control for fuzzy singular system is converted to the analysis of H∞-control for common singular system. When the premise variables is unmeasurable, A new method for nonlinear H∞-controller design of fuzzy singular system is given which avoid analysing the subsystems of fuzzy singular system.

Because the network application scope unceasing expansion, the demand for information is increasing, the requirements of optical transmission network technology is more and more high, so it determines the optical network technology needs continuous development and innovation, and the development trend of optical network technology is the intelligent optical network technology. Intelligent optical network technology is the typical automatic switched optical network (ASON) technology [1] . After many years of research and development, this technology has finally been applied to the actual.With the continuous progress of society and the rapid innovation of science and technology, the traditional network technology has been unable to meet the requirements of people's life and work. In the traditional network has a lot of disadvantages, such as broadband distribution of data services is not flexible, low transmission efficiency [2] . Therefore, it is very important to develop an efficient, secure and reliable network according to the people's needs and the weakness of the traditional network. Intelligent optical network is to make up for the weakness of the traditional network and was developed by the network technology, can make people's life and work more convenient and efficient.

a Based on the concept of generalized nonlinear system model tracking, the tracking problem is studied by using variable structure control method. In nonlinear system, based on the classification system, the design of generalized tracking system switching function S, makes the switching surface S=0, realize the model tracking, and the design of variable structure control law, realization of generalized nonlinear systems with sliding mode.

With the rapid development of society, the progress of science and technology, computer technology through continuous improvement and perfect has been widely used in various fields. In power system, the main function of the optimal control theory is in the midst of all the solutions to find a more scientific and reasonable solution. The optimal control theory in modern control theory occupies a very important role [1] . In the control system, is the most important part of computer, computer is mainly to complete the online control, the optimal control theory to thoroughly applied to the practical work, improve the work efficiency of the power system to ensure the reliability and security of power system With the rapid development of science and technology, power system automation direction gradually, the safe operation of power system automation is decided by the control theory [2] . With the rapid development of the optimal control theory and its application in electric power system more and more deep, the existence of this theory is mainly in all solutions in the search for a suitable method. The optimal control theory is in the last century 60 s come up an idea, after half a century of development, its application in power system is perfect, the application result in power system is also very obvious. THE ROLE OF THE OPTIMAL CONTROL THEORYIn modern control theory, the optimal control theory is the core content, is an important part of the whole control theory, under certain conditions to choose all the control laws and policies, choosing an optimal control strategy and control rule, makes the whole power system under prescribed performance indicators to achieve the optimal value. For the optimal control theory, the most basic content is a maximum theory and dynamic programming, and the system is the main way of using the variational method.Dynamic programming was first proposed in the last century 50 s, puts forward the main purpose of this policy is to be able to solve multi-stage decision process. This method can get the implementation and application, mainly has the optimality principle as the foundation. Similarly, is also the last century 50s, ponte aurous created out of the maximum principle, and the maximum principle the optimal