Key Engineering Materials Vols. 467-469

Abstract: This document explains and demonstrates how to use SRIO interface in the real-time transport platform for high-resolution measure image. The raw CCD data is first captured in a FIFO implemented in FPGA, and then transferred from FPGA to DSP through the SRIO interface. When one frame image data is captured, it is displayed on the screen of PC computer.

Abstract: Accurate tracking for Augmented Reality applications is a challenging task. Multi-sensors hybrid tracking generally provide more stable than the effect of the single visual tracking. This paper presents a new tightly-coupled hybrid tracking approach combining vision-based systems with inertial sensor. Based on multi-frequency sampling theory in the measurement data synchronization, a strong tracking filter (STF) is used to smooth sensor data and estimate position and orientation. Through adding time-varying fading factor to adaptively adjust the prediction error covariance of filter, this method improves the performance of tracking for fast moving targets. Experimental results show the efficiency and robustness of this proposed approach.

Abstract: To support automated service composition, adaptation and verification, there should be a formal model for web service behavior description. For the sake of accurately representing web service behavior, inspired by workflow nets and consume-produce-read nets, we propose a novel formal model for web service behavior description, which can not only describe the control flow, but also the data flow as well as the communication flow of the web service accurately. The model regards tokens, data and messages as control resources, data resources and communication resources and adopts completely different store-and-fetch strategies for each kind of resources respectively.

Abstract: Rapid, accurate and standardized budget estimate is the basis of project bidding, which involves a lot of data information verification and charts. At present, many companies often use the traditional manual method in project budget estimate, which is time-consuming and error-prone. Aiming at the requirements of blast furnace coal powder injection project bidding, this paper developed a blast furnace coal powder injection project budget estimate management information system by using Visual Basic 6.0 and SQL Server database technology, introduced its overall function modules and the key technologies, including system role represent and use case analysis, the system data storage methods, report forms customization methods and so on. Finally, an applied case is given, which can make the project budget estimate conveniently, quickly and accurately, and can reduce the labor intensity of project information management.

Abstract: This paper proposes a novel application of ant colony system for edge extraction which the food definition is combined the idea of the gradient and the multi-scale. After building the food map, ant colony system is employed to obtain the maximal food response, which makes the method adapt to strong or weak edge basing on the local extremum instead of global one. With the feedback of the pheromone and prior directional searching, the simple ants achieve ideal edges based on the direct response and the mutual cooperation. Furthermore, the method can work well in both gray level images and color images. Finally, the experiments prove that edge extraction result of the proposed method is better than other intelligent ones and traditional ones, and it is not sensitive to the noise.

Abstract: With the rapid development of Internet, how to find useful information rapidly is becoming more and more important. General search engines somewhat satisfy users’ search needs. However, they do not consider users’ interests or background. Search engine will be more personal, intelligent and professional. It is necessary that personalized search engines come to reality. This paper designed and realized personalized search engines system by learning user feedback information. System can be able to optimize searching results and return the results that user is most interested in, also can tell users about other users’ interested modes, in order to make users share searching results with each other and improve the efficiency of searching.

Abstract: Temperature plays a vital role in the machining industry today. A Nickel-Chrome versus Nickel-Silicon thin-film thermocouple system has been established for measuring instantaneous workpiece temperature in chemical explosive material machining. The NiCr/NiSi thin-film thermocouples have been deposited inside high speed steel cutters by magnetron sputtering. The typical deposition conditions are summarized. Static and dynamic calibrations of the NiCr/NiSi thin-film thermocouples are presented. The Seebeck coefficient of the TFTC is 40.4 μV/°C which is almost the same as that of NiCr/NiSi wire thermocouple. The response time is about 0.42ms. The testing results indicate that the developed NiCr/NiSi thin-film thermocouple sensors can respond fast enough to catch the very short temperature pulse and perform excellently when machining chemical explosive material in situ.

Abstract: Solenoid valve is the key component to determine the performance of electronic fuel injection system for the diesel engine. By theoretically analyzing the characteristics of solenoid valve driver, we found out that one of the factors that affect the closing and opening speed of solenoid valve is drive current. In this paper, GT-Flow software is used to simulate and analyze the drive current, and come to the optimal combination of current. The selected drive current is used to analyze the emission performance of 16V265H diesel engine, to determine the best advance angle for fuel supply, and to compare the simulation results with the experimental values.

Abstract: In this paper, a robust image watermarking method with one-dimensional improved S transformation is proposed which is robust against geometric distortion. This watermarking is detected by a linear frequency change. The chirp signals are used as watermarks and this type of signals is resistant to all stationary filtering methods and exhibits geometrical symmetry. In the two-dimensional Radon-Wigner transformation domain, the chirp signals used as watermarks change only its position in space/spatial-frequency distribution, after applying linear geometrical attack. But the two-dimensional Radon-Wigner transformation needs too much difficult computing. We propose a modified Gaussian window which scales with the frequency in an efficient manner to provide improved energy concentration of the S-transform. The proposed scheme can resolve the time-frequency localization in a better way than the standard S transformation. The watermark is embedded in the 1D improved S transformation domains. The watermark thus generated is invisible and performs well in test and is robust to geometrical attacks. Compared with other watermarking algorithms, this algorithm is more robust, especially against geometric distortion, while having excellent frequency properties.

Abstract: This paper introduces the structure and working principles of the automotive electronic throttle control system. After analyzing the non-linear factor of the system, mathematical model of the system is built up. And the working principle of non-linear torque observer is described. Then incremental PID controller and non-linear torque compensator were designed and simulated in the matlab/simulink. From the result, we can see that the control precision of incremental PID controller is poor, and it also easily has an overshoot. However, PID controller based on non-linear torque observer has a better tracking performance. It can meet control requirements very well.