Applied Mechanics and Materials Vols. 71-78

Abstract: The technology of vehicle tracking is a very critical and fundamental part in the Intelligent Transportation Systems (ITS). After the principle of Kalman filter was introduced, a method of vehicle tracking based on basic Kalman filter is proposed and the tracking error analysis is carried out in this paper. The experiment results show that the vehicle tracking method is robust, accurate, easily achieved and has good practical application merit.

Abstract: In order to research on the stress change and influencing factor of whole construction process of simply supported to Continuous system T-beam bridge, combined with Guizhou Bai-long bridge, the stress change is carried out the real time inspection in each construction stage, and the finite element model is established to analyse Stress changes in whole construction process. The monitoring value is ​​more consistent with the theoretical value in each stage , monitoring dates and theoretical calculations showed that pre-stressed is the main factor of stress changes in construction process.Pre-stressed tension in negative moment region has obvious influence on the stress of middle span, the stress of top and bottom plates in wet joints will be equivalent after tendons tension in negative moment Region.

Abstract: Based on electrical and chemical analysis in oils of some fault transformers in Shenzhen, it indicates that the corrosive sulfur contained in insulating oils may cause faults. Corrosive sulfur would react to copper wire and engender Cu₂S during the operation of transformer. Because of the electric characteristic of Cu₂S, this substance will penetrate and pollute insulating paper of the wire, and then weaken the insulation intensity. At last it would wear out coil insulation. Experiments indicate that adding passivator to insulating oil is an effective method to solve the problem. Passivator can form a protection layer on the surface of copper, which can avoid copper corrupting and can stop copper deposition in the presence of potentially corrosive sulfur compounds as well.

Abstract: Panoramagram is the important research field based on image rendering technology in recent years. It is a new exploratory subject of computer image processing. This article describes the characteristics of panoramagram, application technique and the application area of panoramagram mosaic.

Abstract: The paper briefly sums up the digital video panorama stitching steps, core issues and common registration algorithm on the base research of panoramic digital video technology. Also image registration algorithm based on feature line segment ratio is applied to educational panoramic digital video production. Examples have shown that the algorithm has good results in convergence rate, accuracy, and workload and so on, which has proved valuable in the digital video research. The advantages and disadvantages of the algorithm are summarized for the further study.

Abstract: Learning field curriculum program is a curriculum model in which thematic unit are designed and organized according to the process of professional task and work, which is a core in curriculum development of modern vocational education in German. This article describes the curriculum reform in learning field and its three basic elements in curriculum model concerned. Moreover, taken Basic Computer course as an example, the paper details the whole process of organization of the learning field curriculum model, such as teaching content designing, teaching and implementing.

Abstract: In this paper, a new fuzzy control arithmetic based on mode identification used in semi-active control is put forward, the mode is differentiated by the eigenvectors constituted with drift, velocity and their resultant, and then different fuzzy control strategy is applied. Moreover, by numerical simulation, the control efficiency of the new control arithmetic is compared with semi-active control using sign control law and some passive control.

Abstract: Seen from the latest local war, the air-lined radar opposition has become a key instrument through out the war. It effects on the process and results. The air-lined radar opposition is not only a guarantee of the war, but also a military hit force. So the study of air-lined radar opposition is good for the victory of the war. The paper has concluded and created the criteria of the radar, constructed the model of foil opposition and proved that the capability had decreased apparently. The paper has studied the air-lined radar electronic opposed simulation system, simulated the platform of air-lined radar electronic opposed system. The system is a good tool to train the talents of electronic opposition.

Abstract: Based on the model of three phase boost type PWM rectifier in synchronous dq coordinates, a simple control law, which transforms the rectifier control system into decoupling and linear one,is deduced based on storage function. New rectifier control system based on the law has many advantages, such as simpler structure, and low total harmonic distortion,and good robustness for load. Decouping control system of three phase boost type PWM rectifiers is proved feasible by simulink simulation.

Abstract: Seeing that there are a lot of uncertain and fuzzy factors in the deformation control system of excavation, in this paper, the author combined the fuzzy theory with neural network technology, adopted the ordinary non-linear structure as the fuzzy neural network of neural network structure formed of neuron directly, and it is under the degree fuzzy number which inputs and export the information to import the corresponding network. Thus according to fuzzy neural network, displacement prediction model has been set up.