Applied Mechanics and Materials Vols. 608-609

Abstract: Environmental conditions mountain road is more complex compared to other roads, subject to many affected, this explained the reason for the destruction of highway slope protection, and some reinforcement to optimize the design, and strive to economic rationality, the construction will be easy to put forward a theoretical basis for the construction of mountain highway.

Abstract: The gas-burning boiler fume condensing technique is studied so that the boiler fume can be cooled, a lot of vapor in the fume can be effectively condensed, potential heat in vaporizing can be recycled to improve the boiler heat efficiency and control the pollutant emission.

Abstract: The multi-hazard, wide-covered, complex factors during the large complex underground construction process pose severe challenges to the construction project. With the help of successful forecast cases, typical geological interpretation signs, optimization of combination forecasting scheme, comprehensive geological forecast system is constructed to effectively solve the disadvantage of multiple solutions coming out from the single geophysical methods, and greatly improve the accuracy of forecast of adverse geological conditions, thus ,the target of safety, economical operation and efficiency is achieved.

Abstract: Due to that the Doppler parameters vary according to slant and the resolution is lower using imaging algorithm of traditional pulse compression in processing raw echo data of the missile-borne synthetic aperture radar (SAR). Moreover, an algorithm is proposed to solve these problems, which is based on the fractional Fourier transform (FrFT) for missile-borne SAR imaging. Firstly, an echo signal model is built for the terminal guidance stage of the missile-borne SAR. Secondly, measure the chirp rate of the echo signal through the local optimum processing and get the optimum angles for the FrFT, and then the entire SAR image can be obtained by using FrFT with the optimum angles of the azimuth and range. Finally, the performances of the algorithms are assessed using simulated and real Radarsat-1 data sets. The results confirm that the FrFT-based missile-borne SAR processing methods provide enhanced resolution yielding both lower side lobes effects and improved target detection. The method introduced in this paper has important theoretical significance in detection and recognition for military targets and precision guidance.

Abstract: In this paper we study the control system of single stage rotary inverted pendulum, and put forwards the controller design based on the core of STM32. In control strategy we use the classical control theory-PID control algorithm, which realizes the closed-loop control of rotating arm and swing rod for the single stage rotary inverted pendulum. The final test results show that the control strategy is effective.

Abstract: This paper welds a layer of austenitic stainless steel (SS316L) on specimen of low carbon steel (C15) with a cylindrical surface using MIG Technology in the experiment. The sample was upsetting experiment, cracks and material forming observation respectively using embossing punch, no lubrication flat punch and lubrication flat punch under the condition of 750 °C, 900 °C and 1050 °C. The paper research on forming mechanism of the specimen under laboratory conditions based on the experimental results, the axial symmetry theory model and Numerical Simulation.

Abstract: In the large hydraulic concrete structure that conventional nondestructive testing technique can’t implement quantitative detection, using steady Rayleigh wave technique can acquire various characteristic parameters of concrete. The paper introduces the principle and detection system of steady Rayleigh wave technique systematically, and makes detection experiments to introduce steady Rayleigh wave e technique and application progress of it in quality of large hydraulic concrete and nondestructive detection of crack depth. The practice proves that steady Rayleigh wave detection technique has the characteristics of strong antijamming capability and higher detection precision.

Abstract: With the improvement of life quality, the people attach more importance to health, and have higher requirements on residue detection of harmful substance in foods. The existing traditional detection methods not only have complicated procedures, but also are very expensive, so it is urgent to develop an intelligent rapid residue detector of harmful substances. The paper researches the portability design of intelligent pesticide residue detector. It applies embedded system design method which implements control and processing functions of detector on a Xilinx-FPGA chip, which not only reduces system volume, but also reduces power consumption and cost. So it has great significance to develop rapid food safety testing instrument.

Abstract: Based on Radial Basis Function neural networks , a method of identifying vehicle steering angle is proposed for further investigation of the vehicle handling inverse dynamics. According to the simulation results of a two-degree-freedom closed-loop system and the test of double lane change maneuver, the mapping relationship between vehicle yaw velocity, lateral acceleration and steering angle can be found. The identification results show that the method is not only feasible, but also with high accuracy, little computation requirement and good stability.

Abstract: It is a developing trend for the refractory materials industry that producing refractories using the kyanite ore with minute amounts of titanium. The tests were conducted with an ore sample by a mechanical flotation cell. The isoelectric point of the kyanite ore was found to be pH 6.6. Petroleum sulfonate was found to be an effective collector for kyanite flotation. 55.85% Al₂O₃ is produced with 84.41% kyanite recovery by grinding, desliming, reverse flotation and kyanite flotation.