Advanced Materials Research Vols. 912-914

Abstract: Based on the traditional aspheric surface shape measuring difficulties, a kind of new integral minimum method is presented, whose guiding idea of this method is to make right position for the parts theoretical curve and the measuring curve to sure the error sum to be minimum. The definition of integral minimum method is elaborated, for example parabolic, its surface shape error is discussed, and the right position expression is derived for the parts theoretical curve and the measuring curve. The calculating example shows that the integral minimum method is effective to analyze the real parts contour error due to the right position, so it should be a followed law objectively during the parts surface shape measuring.

Abstract: In order to solve the problem of data integration and sharing for heterogeneous database at various departments from enterprises, this paper analyses thoroughly how to use the XML technology to mask differences between the heterogeneous databases. This paper designs an integration model based on the various heterogeneous databases by using the XML database as the middle database. The integration model is applied in the fault diagnosis system, and a data-exchange platform based on BizTalk is designed. On the heterogeneous database model, the fault diagnosis system can meets the need of multiple heterogeneous databases.

Abstract: Eriocheir sinensis should cultivate in high water quality ponds, which is affected by many combined factors such as physics, chemistry, biology etc. Using the real-time water quality monitoring historical data to test one of the water quality indexes and predict this index in the next time has great significance. The dissolved oxygen is one of the most important indexes in aquaculture, such as in the Eriocheir sinensis pond. This paper established a dissolved oxygen prediction model of water quality monitoring system based on BP neural network. The forecast data which is predicted by the established model could fit the actual monitoring data very well.

Abstract: Based on the nonlinear, strongly coupled and uncertain model of the aerocraft vehicles attitude system, a fuzzy variable structure control method is proposed. Based on the feedback-linearization technique, the system was firstly decoupled into three independent SISO subsystems, and then controllers for each subsystem were designed. Modeling error and unknown disturbance is effectively restrained with the proposed adaptive fuzzy control with variable structure control. Theoretical analysis and simulation results show that the proposed method has high control accuracy, high robust and easy realization.

Abstract: The dynamic quantitative weighing system based on the buoyancy weighing sensor is designed in this paper. At first the principle of the dynamic quantitative weighing system is analyzed and then the mathematical model is established. Secondly the hardware structure of the dynamic weighing system is designed. The buoyancy weighing sensor is introduced. The weighing system is composed of two parts: the buoyancy equalizer and the displacement sensor. Through the field tests, precision, stability and sensitivity of the device has been verified.

Abstract: digital shipbuilding has become the development trend in today's society. Aiming at the shortcomings in today's shipbuilding,we puts forward the design of digital shipbuilding, application technology and artificial virtual technology in the ship. In order to ensure the accuracy of the shipbuilding technology.

Abstract: In this paper, through the characteristics analysis to an example of a thin-walled frame component part in a large precision instrument, some reasonable technology strategies of controlling machining deformation are proposed that included optimizing process route, designing rational clamping method and fixture layout, choosing preferably cutting tool, programming optimal cutting method and tool path, etc.. The way of machining large thin-walled frame component parts in the ordinary NC milling machine is achieved. And it effectively reduces the machining deformation. This way provides guiding and reference for NC milling of the similar thin-walled frame component parts.

Abstract: With the rapid development of mobile Internet, mobile device activation volume is gradually rising. It already has become a significant consumer market mobile terminal. Under the background of electricity supplier, the role of mobile applications will continue to be strengthened in the mobile providers. Designed with commercial value, there is a practical application of competitive mobile application. Developers have the primary goal. Based on the 360 phone application downloads Charts analysis, the factors affect the mobile application downloads, and finally propose existing App corresponding solutions.

Abstract: With the rapid development of the Internet and handle devices rapidly growing popularity, especially 3G / 4G network continues to develop, making the mobile shopping. Mobile Internet and other services are no longer out of reach. Enterprises in order to provide consumers with a better service must proceed from the perspective of consumers. Their double clear consumer mobile shopping and influencing factors have factors on the impact of consumers. Using mobile shopping can develop effective marketing strategy, and actively seeking to develop the road, so as to continuously promote the development of mobile shopping. This paper analyzes the characteristics of mobile shopping behavior of consumers, identifies the factors affecting consumer mobile shopping, and concludes with recommendations for the development of mobile shopping.

Abstract: Database technology is one of the fastest growing areas of computer science, is also one of the most widely used technology, it has become the core of the computer information system and application system technology and the important basis. In this paper, we discuss all the important aspects of database design process, including requirements analysis phase; The conceptual design stage; The logical design phase; The physical design phase; Database implementation stage; Database operation maintenance phase six stages, and puts forward various problems occurred in the database design, and a variety of ways to solve these problems were analyzed.