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According to the reasons and features of car accidents happening in vehicles’ side areas, this paper designed and developed a kind of automotive lateral anti-collision warning system by frequency modulation continuous wave, based on the research on 24GHz linear frequency modulation continuous wave radar-probing system. The system designed in this paper will forecast the potential danger to drivers and avoid the accidents. The hardware structures, algorithm, program flows and working patterns of the warning system were introduced. Furthermore, pointing to the problem of false alarms, a kind of filtering method was presented creatively. This method improved the reliability of the warning system and the accuracy of the forecast. It filtered the disturbance coming from the side of the vehicles, and solved the difficult problem that prevented the millimeter-wave radar from being applied in automotive lateral anti-collision warning system. Finally, the experiment was designed and carried out. The result verified the rationality of the solution and the practicality of the system’s function.

Aiming at the low efficiency and precision of nowadays domestic auto-straightening machine of shafts, a new kind of shafts straightness detection system is researched and developed. The supporting part of the measuring mechanism adopts the mechanical structure of auto-going-down of straightening points supporting pedestal. The whole convolute measuring system fixes on the machine tool orbit sliding table, whose movement can change the position for the straightening point and make positioning faster and more accurate. In addition, this detection system bases on applications math and builds math model by Fourier transform which can separate the elliptical error signal, straightness error signal and impulse error signal and then gained ideal straightness error of shafts.

The MoS2/TiN composite coating was prepared on Ti-6Al-4V by the combination of plasma diffusion and magnetron sputtering techniques. The microstructure and phase constituents of the composite coating were analyzed by scanning electron microscopy(SEM) and X-ray diffraction(XRD). The abrasion resistance of the composite coating was examined on MM-200 abrasion tester. The results revealed that the composite coating consisted of MoS2, Mo, TiN and Ti phases, and its abrasion resistance was excellent under dry friction and absolute sliding.

This paper introduces a novel algorithm that decomposes a given shape into meaningful parts requiring only strokes to specify foreground and background regions. The user is asked to draws freehand sketches to provide some facets as belonging to the desired part of the surface, and then an energy function is constructed based on graph Laplacian. Finally, a solution of minimizing energy function is provided and then segmentation is finished. We have presented an effective interactive system with an easy-to-use UI for mesh segmentation. The experiment results show that our algorithm is robust, fast, and capable of producing satisfactory results with regard to the human intuition and geometric attributes.

In this document, we describe the characteristics of UML and modeling process in brief, building the use case model, static model and dynamic model based in UML, then accomplish the requirements analysis and system design of the Production and Dispatching System of Provincial Measurement Center.

With the rapid development of Telematics and the increasing demand of drivers on vehicles, vehicle Telematics witnesses the great progress around the world. In order to improve the traffic conditions, some countries, especially in the North America, Europe, have carried out relevant projects of vehicle Telematics, such as OnStar, eCall, G-Book, inkaNet. The paper presents the concept and current development of Telematics home and aboard; then gives detailed analysis on and comprehensive comparison among the four Telematics systems mentioned above; proposes the three major problems (speech recognition, charging standards and service chain) to be solved in China based on the analysis on the application of Telematics abroad; finally reveals the prospective of Telematics faced in China.

Along with the development of the measuring technique and computer technology, market competition is aggravating, the modern product of the design cycle demands shorter especially in automobile field. In order to meet the development requirements of automobile, we must reduce the design cycle and cost, so the Reverse Engineering (RE) technique has applications widely. This paper describes some concepts about reverse engineering. It points out the key technologies in reverse engineering like cloud data processing technology and surface reconstruction technology. Finally this paper uses the reverse engineering software CATIA to recover one inner automobile panel and describes the process of reverse engineering in details to build 3D model.

Compared with the column style of Chinese traditional and Western classical from chapiter, trunk, column base in detail. Analysis of the column of the Eastern and Western Art Deco and shape differences. By comparing ,absorb the essence of both for the theoretical and practical of modern style column type decoration.

Specimens of medium carbon steel were quenched and warm-compressed on a Gleeble 3500 Machine. The microstructure of the specimens was studied by using an optical microscope and a transmission electron microscopy. And the properties were investigated by using tensile tests and hardness tests. Results show that the starting microstructure is lath martensite with a small amount of flake martensite. After 50% compression at 550-650°C, ultrafine grains can be observed in the specimens. The microstructure of the specimens compressed at 600°C is equiaxed ultrafine ferrite grains + nano-carbides and a good combination of strength and ductility is obtained. The tensile strength and total elongation are 861MPa and 19.1%, respectively. The hardness is 233.81Hv.

Depolymerization of nylon 6 (PA 6) to obtain caprolactam in the mixture of water and ionic liquid ([Bmim]Cl) was a environmentally benign and high efficient method. There are two reasons for the using of ionic liquid: first is that high H+ concentration in the mixture and the other is that anions of ionic liquid can break the hydrogen bonding of PA 6. The products of depolymerization are analyzed by mass spectrometry and high-performance liquid chromatography and the main is caprolactam. The optimal conditions to obtain caprolactam are determined of reaction temperature 170 °C, IL/H2O (w/w) 13.4%, and reaction time 8 h, and thus the yield of caprolactam 30.7% and degradation of PA 6 94.1%.