Advanced Materials Research Vols. 542-543

Abstract: In order to accurately locate the changing demands and objects of customers, a novel mining algorithm was presented to predict the Optimum Customer Demand (OCD) in the uncertain front end, which can be formulated as a dynamic nonlinear optimization problem. The improved Particle Swarm Optimization involves accurately detecting the changes all of the search space and reliably updating obsolete particle memories, which has been shown to be effective in locating the changing plentiful innovative thinking. Finally, the algorithm is applied into the prediction of customer demands in car’s appearance feature, which effectively guide the implementation of product innovation and greatly improve the front end performance.

Abstract: Intelligent transportation is the future direction of traffic, and the video-based vehicle detection and tracking is one of the key technologies. Traffic condition is affected by climate, light and other factors, its changes are very complex so as to affect the effect of vehicle detection. The paper puts forward a background reconstruction algorithm of dynamic updating. Through comparing the current frame with background frame, the method obtains the dynamic frame of continuous changes to build new background image, and then to achieve dynamic-updating background. And according to the background obtained, the method detects moving targets with background subtraction and it will be applied to video-vehicle detection. Experimental results show that the algorithm is very fast for reconstruction and has achieved good results in the video vehicle detection.

Abstract: With the traditional energy exhausting rapidly, the development of new sustainable energy especially solar energy has a significant meaning. The paper mainly introduces some characteristics of photovoltaic (PV) power generation system involving in its development, construction and key technology. Solar cells can supply power energy through absorbing sunlight. As a result, some key technologies such as maximum power point tracking (MPPT), islanding detection and energy conversion are concerned by many investigators. Finally, this review gives some conclusion and prospective of PV power system.

Abstract: This article introduces the classification and composition of Grid-connected Photovoltaic Power System, and the research status of its nonlinear behavior. In the Photovoltaic Power System, photovoltaic array, DC/DC converter, DC/AC inverter and nonlinear load will appear lots of nonlinear dynamic behavior such as bifurcation and chaos phenomena. The paper elaborates the DC/DC converter and DC/AC inverter in the Photovoltaic Power System, and analyses their nonlinear phenomena.

Abstract: Liaoning equipment manufacturing industry is the foundation of regional economic development and the pillar industry in Liaoning province. Liaoning equipment manufacturing industry is not only the carrier of scientific and technological innovation, also the development of scientific and technological innovation. The long-term monitoring and controlling mechanism of scientific and technological innovation affects scientific and technological innovation for Liaoning equipment manufacturing industry, also determines the competitiveness of Liaoning equipment manufacturing industry. The long-term monitoring and controlling effect of scientific and technological innovation for Liaoning equipment manufacturing industry is not only in the interior and exterior, still can bring a series of incidental interests.

Abstract: The processing of experimental data of an undercarriagedoor lock system in the condition of vibration is an important part of the reliability test for the undercarriagedoor lock system , which is of significance to guarantee the aircraft safety and reliability of the lock system. The analysis of aerodynamic loads data and strain data in the different case of non-vibration and vibration are conducted with curve fitting, then the reliability evaluation is given and the results with and without vibration are compared and analyzed in this paper. From the work above, the experience which is worth to be referred to is summarized and lays the foundation of evaluating the reliability of the undercarriagedoor lock system in vibration case.

Abstract: As soft rock roadway projects have the characteristics of large deformation, and earth pressure,difficult to support, and all that make shallow form of support can not meet the needs of the soft rock roadway, the main reason is that the soft rock roadway has compound deformation mechanism, which makes that the single support physical science features and rock mechanical properties can not be coupled, and a key part of the soft rock roadway begins to undermine firstly, which leads to the instability of the entire supportive system. Therefore, identifying the soft rock roadway compound deformation mechanism and transforming the compound into a single type are the key technologies to solving soft rock problems. This paper utilized the deep soft rock roadway of Daqiang Coal Mine of Tiefa Coal Industry as engineering background, systematically studied the mechanical characteristics of the soft rock roadway engineering geology, deeply analyzed the mineral properties of surrounding rock, and proposed the soft rock roadway’s compound deformation mechanism and conversion process of transforming compound into single deformation mechanism, providing important theoretical basis for designing .Daqiang Coal Mine deep soft rock roadway

Abstract: A GLR (generalized likelihood ratio) chart for Poisson distributed process with individual observations is proposed and the design procedure of the GLR chart is discussed. The performance of the GLR charts is compared to the exponentially weighted moving average (EWMA) chart and the GWMA chart. The numerical experiments show that the GLR chart has comparable performance as the other two charts. However, the GLR chart is much easier to design and implement since there are more design parameters in these two charts.

Abstract: Based on the synthesis of several common grid-connected methods of wind generator, the paper compares their advantages and disadvantages when these methods are used in theapplication of wind power generation respectively, then predicts their further development trend of wind power grid-connected technologies. Besides, brushless doubly-fed generators are widely applied inVSCF(Variable Speed Constant Frequency) wind power generation system