Advanced Materials Research Vols. 468-471

Abstract: The common filters used in spatial gamut mapping algorithms were studied in this paper which included Gaussian filter and bilateral filter based on spatial gamut mapping theory. And one framework of spatial gamut mapping oriented to digital printing was designed which combined the printing image characteristics and reproduction requirements. The framework combined printing image processing technique and gamut mapping technique and the results help to choose or develop better spatial gamut mapping algorithms oriented to digital printing.

Abstract: Electric equipment breakdown is mainly caused by Partial Discharge (PD), so identification and diagnosis of PD are of great importance to the maintenance of electric equipment. This research analyzes the field TEV data of PD using SVM theory and establishes a model to detect and analyze PD, with related experiments verifying the validity of the model. According to the experience on site, we redesign the evaluation criteria and build a new model to guarantee that the identification rate reaches over 80%. The comparative experiment indicates that the SVM method proposed in this paper performs better on PD detection than BP Neural Network, laying foundation for further research.

Abstract: Soil arching has important influence on the behavior of piled embankments. How to calculate stress concentration ratio is of great concern when designing embankment over soft soils reinforced by rigid concrete piles. A numerical analysis by using a commercial FEM program was conducted to reveal the mechanism of soil arching in piled embankments. And also, the influence of embankment height, pile-soil relative displacement, cohesion and internal friction angle on the equal settlement plane was evaluated. The results indicate that the stress concentration ratio varies with the pile-subsoil relative displacement and has upper and lower bound value. The effect of pile-soil displacement and the strength parameters of embankment material on the equal settlement plane can be neglected. It was also found that the equal settlement plane height is equal to 1.6 times the pile-cap clear spacing. When the ratio of embankment height to the pile-cap clear spacing is greater than 1.6, no apparent differential settlement will occur on the embankment surface.

Abstract: The internal flow-induced noise of the centrifugal pump is essentially caused by its complex internal flow, hence the research on the pump internal flow pattern is a crucial part of studying the flow-induced noise for centrifugal pumps. The DES unsteady simulation based on S-A model was applied to analyze the noise in the flow domains which are consist of the volute and the impeller passage in the paper. The frequency domains of pressure fluctuation at monitoring points under different operating conditions for different zones were analyzed by using SYSNOISE sound processing platform. The results show that the distribution of the acoustic source which was directly associated to the pressure fluctuation of the volute face generally aggregate at cutwater with the same frequency characteristic. Field sound pressure and dipole source do not have simple linear relationship and the strongest acoustic radiation intensity appears at blade passing frequency. Pipeline method applied in flow-induced noise measurement is effective and the flow rate is one of the major factors in acoustic radiation.

Abstract: The musical instrument manufacturing industrial district is not only general but also unique for China's specialized industrial districts. This paper takes Yangzhou Chinese zither (Chinese musical instruments) industrial district and Xiqiao violin (Western musical instruments) industrial district as two typical examples to do a comparison, deliberating on the directions and paths of the transformation and upgrading of these two industrial districts from two perspectives, that is, the similarities and differences between their characteristics of changes.

Abstract: Introduced the energy recovery hydraulic elevator system's principle of work, calculated the uplink and the downlink of the hydraulic elevator system's useful work, total power and efficiency, results show that energy-saving effect of the hydraulic system was more obvious.

Abstract: In this paper, the author redesigned the high efficiency rotor classifier under the premise of the environmentally green theory using the traditional design concepts with modern design methods; combined with years of experiences in classifier designing and integrated practical ideas from expertise in the profession.

Abstract: The paper is based on nominal stress method and MSC.FATIGUE software, adopts virtual fatigue design method, take cart balance beam of quayside container crane as an example, build its finite element model, conduct strength analysis on the balance beam and fatigue analysis under specified load course by MSC.Fatigue software, then obtain life distributions which can provide the basis of nichetargeting improvement and fatigue research in design stage. Through above analysis, it has been proved the feasibility of the method that the paper adopted, and it can greatly reduce the expense that the fatigue life testing brings about.

Abstract: An integrated supplier selection problem under fuzzy environment is studied in this paper. Firstly, the linear weight method is used to calculate the scores of suppliers according to their different attributes, such as: quality, service, warranty, delivery, reputation and position, which are assumed as fuzzy variables. Secondly, a fuzzy expected value programming model and a fuzzy chance-constrained programming model are proposed to select the best combination of the suppliers and determine the order quantities. A hybrid intelligent algorithm, based on fuzzy simulation, genetic algorithm and neural network, is used to solve the two models. Finally, a numerical example is given to illustrate the effectiveness of the proposed models.

Abstract: Establish the full three-dimensional flow model of the torque converter, proper mesh the model, select the appropriate boundary conditions, and use the sliding mesh method to deal with the interactions of the impeller, turbine, and reactor in different rotation speeds. Analysis the flow rate, pressure, and the loss of full flow field passage of the torque converter, elaborate the formation mechanism of the flow field, agreement with the experimental date compare to the calculated data, more accurate than the traditional single passage model compare to the full passage model, provide the direction of design optimization of the torque converter.