Applied Mechanics and Materials Vols. 427-429

Abstract: In order to diagnose bearing fault with less samples,combined improved EEMD with SVM in the bearing fault intelligent diagnosis under low dimensional small sample is researched in this paper.It is applied to the binary classification and identification in bearing normal and fault state.The results show that depend only on less sample data 5d feature vector classification after training, SVM using linear kernel function and polynomial kernel function classification accuracy is still up to 100. classification accuracy under the less sample data in less 5d characteristic vectors by RBF kernel function under Sigmoid kernel function is relatively low.Choose appropriate SVM kernel function completely can realize low dimensional small sample right binary classification.

Abstract: At present, with the increasing development of ocean exploitation, ROV has been used in many aspects such as scientific research, military affairs and assistance, as a result many countries around the world get more value from the research work on ROV. The FROVs (Fiber Remotely Operated Vehicle) float station usually has an important influence on its performance. The purpose of this paper is to do some research on the adjustment of the FROVs float station, and to design a float station adjustment simulate system based on FROV.

Abstract: A kind of superabsorbent hydrogels was synthesized by an optimized rapid solution polymerization of concertrated partically neutralized acrylic acid in the presence of an organic crosslinker agent under normal atmospheric conditions, 2-acrylamide-2-methyl propane sulfonic acid (AMPS) was added into the gels as co-polymerization monomer to enhance the ability of water absorption. Meanwhile, the hydrophilic nanosized clay Laponite XLG was also added into the gels for improving the shape stability and mechanical properties of gels. Through controlling the ratio of monomers and the content of nanosized clay, the superabsorbent hydrogels with excellent swelling ability and good mechanical properties could be gotten.

Abstract: In order to discuss the effect of energy saving of heat-reflective insulation coating on exterior walls of building, the wall temperature change of two test rooms with heat insulation or not in Hangzhou has been monitored in summer, and the heat flux data of east, south and west walls were analyzed. The results indicate that the reflective coatings reduce the exterior surface temperature by up to 7 to 8°C. The reduction in heat gain of east, south and west walls is significant, which is the cooling effect. The total surface heat gain of exterior walls without reflective coatings is 2.44 times larger than those without them. In particular, the heat gain of walls with reflective coatings is nearly 5.27 times more than that of walls without reflective coatings. The reduction in electricity consumption of air-conditioning system in the building with reflective coatings is 2.5KWh/m² per month by calculation, which well proves the energy saving effect of reflective coatings.

Abstract: With the accelerated pace of the electric bus, the growing charging power demand will have a certain influence on the grid. As a precondition of safety operation for power grid, studies on electric bus charging load model are also the theoretical basis of electric bus charging orderly. Firstly, based on the analysis of arriving time and state of energy, power demand model of electric bus charging station was set up. According to this model, electric buses charging station power curve within a day was calculated and presented with the operating data in a demonstration electric bus charging station. The results of the simulation examples show that the modeling method of the charging power demand model is effective.

Abstract: This paper proposed the basic idea of constructing method of large v order Steiner four elements large set under the blow of steiner three elements. At the same, this paper analyzed the conditions for the existence of v order Steiner four elements. This paper also proposed the construction method of v order Steiner four elements large set based on the initial block matrix permutation. This paper also introduced the entire construction process of 9 order Steiner four elements systems large set. This paper proved the number of 9 order Steiner four elements s⁽¹⁾(9)of 9 order Steiner four elements large set is d(9)=v-8=1 .

Abstract: The effects of heating rate on the preparation, characterization, pore-forming mechanism and bloating mechanism of sludge ceramics were investigated. The experimental results indicated that physical properties of SSC were highly dependent on heating rate. SSC with higher expansion rate and lower water absorption could be obtained as the heating rate was between 4 °C/min and 5 °C/min. Porosity and expansibility of SSC were closely related to the heating rate. The heating rate could affect the relationship between the forming rate of gas and the forming rate of glass phase, and further influenced the bloating phenomenon of SSC.

Abstract: Muscle length change and mechanical effect have an important meaning to the analysis of the relationship between the muscle fatigues. It can be widely used in muscle physiology pathology research which played a role of technical guidance to cure muscle fatigue damage and prevent muscle fatigue. This paper analyzes the muscle physiology theory. It concludes that the muscle is composed of a series of muscle bundle which is made up by a set of parallel muscle fiber through the theoretical analysis. Then, it sets up a model formula of muscle length change and stress relationship based on the mechanical theory. It gets muscle movement and mechanical related parameters by measurement method. It uses the ADAMS and Mat lab software to do the simulation analysis on the muscle movement. It establishes the muscular movement speed and the 3 d graphics of muscle displacement under the action of muscle force through the Mat lab software. Through the ADMAS software it establishes the displacement curve under the action of muscle forces which changes with time and it provides a theoretical reference for the research of muscle length change and mechanical relationship based on muscle physiology theory.

Abstract: The explicit solution to calculate maximum upsurge in the water chamber surge tank when load rejection at the worst instant followed by load acceptance has been derived. Comparison is made between explicit solution and the numerical solution by means of the fourth order Runge-Kutta method, and the results show that the derived formula is more convenient for calculation and the precision is high. Therefore, the formula proposed in this study is of great value in practical engineering.

Abstract: The hot-dip coatings containing pure Zn and Zn-4.5Al-0.05Mg-0.03~0.12Ce were prepared through congruent melting. The interface of the hot-dip coating was researched by the scanning electron microscope (SEM) after polished and etching, and the results showed that the alloying elements were uniformly dispersed in the coating. The anti-corrosion performance of the coatings was researched using the weight loss rate by the neutral salt spray testing. The reasons of the effects of the elements Al-Mg-Ce on the anti-corrosion performance promoting were researched through SEM and X-ray diffraction analysis (XRD). The results showed that the protective effect of the Zn-4.5Al-0.05Mg-0.09Ce coating for the steel was enhanced by the electrochemical action.