Advanced Materials Research Vols. 143-144

Abstract: This paper proposes a new method to calculate the wind-induced dynamic stress response of guyed mast earplate node, which considering the welding residual stresses in earplate weld joint. Firstly, a numerical simulation of weld residual stress of key nodes based on finite element method is presented. Then, taking the welding residual stresses as initial stress, the dynamic stress analysis of the guyed mast earplate’s weld was completed. The results show that in the dual role of the welding residual stress and the wind load, the von Mises equivalent stress of some hot spots in welds have exceeded the material yield stress of steel.

Abstract: With outsourcing and the software market competition intensifies, software alliance and outsourcing of the organization for the enterprise, scientific, reasonable assessment software alliance ability outsourcing decision to build a key factor is the prerequisite for business to obtain continuous competition advantages of decision-making. to provide the basis of the resources of studies on the basis of ability, the enterprise, from the background, the core, trust control mechanism and coalition partners four an alliance decision-making body of appraisal target.(ANP) constructs ability software outsourcing alliance decision model based on the indicator system using the analytic hierarchy process, and unifies the example utilization super decision-making (Super Dicisions, called SD) the software confirmation model.

Abstract: In the present study, Polytetrafluoroethylene (PTFE) porous hollow fiber membranes were prepared by PTFE concentrated suspension with the mixture of Poly(vinyl alcohol) (PVA) and Sodium alginate as the fiber-forming carrier. Factors affecting PTFE membrane pore structure and mechanical properties were investigated. Results showed that, (1) the permeation and mechanical properties of the PTFE membrane were influenced significantly by the sintering condition, (2) Morphologies of membranes were observed by scanning electronic microscopy (SEM), fixed sintering state was aided to form the pore structure which was much different from the node-fibril network obtained by PTFE biaxial-stretching process.

Abstract: Facial Expression recognition based on Non-negative Matrix Factorization (NMF) requires the object images should be vectorized. The vectorization leads to information loss, since local structure of the images is lost. Moreover, NMF can not guarantee the uniqueness of the decomposition. In order to remedy these limitations, the facial expression image was considered as a high-order tensor, and an Orthogonal Non-negative CP Factorization algorithm (ONNCP) was proposed. With the orthogonal constrain, the low-dimensional presentations of samples were non-negative in ONNCP. The convergence characteristic of the algorithm was proved. The experiments indicate that, compared with other non-negative factorization algorithms, the algorithm proposed in the paper reduces the redundancy of the base image and has better recognition rate in facial expression recognition.

Abstract: To achieve low costs and better accuracy of individual risk assessments, we constructed a practical method based on multiple classifiers. The method includes many singal classifiers, such as decision trees and the cluster analysis. And we tested it empirically. The result shows that the application of the method can achieve better accuracy than any single classifier of it.

Abstract: : According to the research on whole curves of strain-stress of concrete materials, the paper illustrates in evidence features of stages and shows that the discrete feature of curve often occurs in strain-softening stage. After chaotic dynamic analysis of testing datas, it presents that system of whole process of strain-stress evolves from ordered steady state to low chaotic state and then to high chaotic state along with increase of compressive strength. The linear relationship of strain- stress grows evident and the system evolves from strong ordered steady state to low chaos state. The strain-stress system before compressive strength peak is basically in weak chaotic state. The is proposed to be the stability criterion of concrete features in different stress stages, and the is regarded as the representative value of the system stability degree. The calculation of example shows that the stability criterion definited by the proposed method is consistent with the actural situation.

Abstract: Pure and highly crystalline spinel LiMn2O4 has been successfully prepared by a modified solution combustion synthesis (MSC) method at 400oC for 5h, while strong Mn2O3 impurity is present in the product prepared by conventional solution combustion synthesis (CSC) method on the same conditions. The particle size of LiMn2O4 prepared by MSC method is about 200 nm with a uniformly distribution. Electrochemical tests indicate that the LiMn2O4 prepared by MSC method exhibits a higher capacity, better cycle life and better rate capability than that of prepared by CSC method. It is proved that some disadvantages (such as low purity and bad crystallinity) of CSC method at low temperature can be improved efficiently by MSC method.

Abstract: The paper proposes a novel discriminant non-negative matrix factorization algorithm and applies it to facial expression recognition. Unlike traditional non-negative matrix factorization algorithms, the algorithm adds discriminant constraints in low-dimensional weights. The experiments on facial expression recognition indicate that the algorithm enhances the discrimination capability of low-dimensional features and achieves better performance than other non-negative matrix factorization algorithms.

Abstract: In order to design and fabricate the flexible force sensor , we have researched the piezoresistivity of silicon rubber/ carbon black composites and given the academic calculation formula between pressure and electrical resistivity. The experiments illustrate that the homogenization of carbon black and the elastic modulus of composites can be improved effectively by dispersing nanosize silica filler and using organic solvent . As a result , the piezoresistivity of composites can be improved. Carbon black content of 10% with good pressure-sensitive conductive rubber, heat-sensitive in a certain pressure range is also good.Moreover , the fore - sensitive device fabricated by the composites is free from the limitation of the surface shape of the tested objects which can be widely applied to various squeeze stress measurement on any regular and unregular curve surfaces.

Abstract: This paper solves that image segmentation result is not consistent with human visual perception or too broken. First of all, based on the continuity of image features, appropriate human vision, calculated the similarity of color image pixel as Eq.2 in HSV space to grow region, then made the regional merge, using normalized-cut segmentation method as Eq.4 and Eq.5 to eliminate over-segmentation phenomenon. In this paper, experimental results shows that the segmentation can be achieved very good results as Fig.1, and parts of the method can be applied in other segmentation to solve over segmentation. This method on color images as the research object is different from other methods on gray images, the selection of seeds and achieves these automatic that differ from general algorithms, presents a new implementation to solve over-segmentation.