Key Engineering Materials Vols. 480-481

Abstract: Kansei Engineering is a technical methodology to translate consumer’s Kansei into product design elements. The target of this technology is to provide designers and manufacturers with a technique to master the emotional and spiritual needs of consumers and then manifest them in product design to enhance competitive edge. In light of this situation and on the basis of finishing a lot of English literature reading about this technology, the author conducted systematical study about Kansei Engineering in this thesis with the aim to enhance understanding of it for domestic designers and accelerate spread of it. Basing on the study about the situations of China’s domestic design industry, the author analyzed several points that China’s design industry should learn from Japan and Kansei Engineering technology, and proposed a simplified Kansei Engineering Model which is easier to execute and suitable for domestic design industry. In conclusion, this paper gives an introduction to the theory of Kansei Engineering system, and explores the relationship between consumer's desire and massage chair design factor with the SD (Semantic Differential) method, providing effective reference for the massage chair design.

Abstract: Based on the remote maintenance of motor exciation, this paper discusses the function design and solution method of communication software which is used in remote monitoring system of motor exciation. It mainly introduces the process of data transmission founded on the Public Switched Telephone Network (PSTN) and key problems of the implementation of communication MSComm control in VC++.

Abstract: Devising a complete and correct set of roles for supporting the least privilege principle has been recognized as one of the most important tasks in implementing RBAC. A key problem is how to find such sets of roles which have the least permissions. However there are too few formalized descriptions and definitions on this problem. In order to provide a material object for researching the least privilege principle, we define the least privilege mining problem (LPMP) and its two variations: δ-approx LPMP and MinNoise LPMP. By showing formalized descriptions, we clarify clearly the methods of discovering least permissions. Correspondingly, we give two simple algorithms to implement the methods.

Abstract: In this paper, the idea loading and unloading workpiece on catenary based on machine vision has been proposed, for the feature of the hook on catenary, we first used gray-scale transformation, used a variety of edge detection operators to detect the image edge, then combine prewitt edge detection operator and Otsu to segment the hook image, the result shows that this method can extract the image edge of hook effectively, lay a good foundation for loading and unloading workpiece automatically.

Abstract: The multi-agent technology and their applicability to CNC remote monitoring and fault diagnosis system (RMFDS) is discussed in this paper. According to the functions of sub-systems of RMFDS, a layered architecture of CNC RMFDS based on multi-agent technology is proposed. Moreover, task planning of multi-agent is presented, and the design of agent is realized by self-deciding mix type extended Belief-Desire-Intention (BDI) This architecture is useful for providing an open and integrated solution of network-based manufacturing CNC RMFDS.

Abstract: The cooperation of urban traffic control system and urban traffic flow guidance system may perform an important role in alleviating traffic congestion. To achieve this objective, a dynamic traffic coordination control model of traffic congestion based on synergetics is proposed in this paper. After that approach, a simulation scheme based on VISSIM 4.2 is carried to evaluate the reliability of the model. The results proved that the whole system could benefit a lot.

Abstract: Polyphone disambiguation is the core issue of the grapheme-to-phoneme (G2P) conversion in Mandarin Text-to-Speech (TTS) system. In this paper, we propose a maximum entropy (ME) model to disambiguate polyphones, and evaluate various keyword selection approaches in different domains. Furthermore, we design a hierarchical clustering algorithm for automatic generation of feature templates, which minimizes the need for human supervision during ME model training. Results of comparative experiments show that, for the task of polyphone disambiguation, ME model obviously outperforms decision tree (DT), log-likelihood ratio is the best scoring measure of keyword selection, compared to manual templates, templates automatically generated by our hierarchical clustering algorithm significantly improve the accuracy of polyphone disambiguation, and greatly reduce the size of the ME model.

Abstract: The methodology of the optimal design for the 6-UPU parallel mechanism (PM) is presented based on genetic algorithms. The optimal index which expressed by Jacobian matrix of the PM is first deduced. An optimal model is established, in which the kinematic dexterity of a parallel mechanism is considered as the objective function. The design space, the limiting length of the electric actuators and the limit angles of universal joints are taken as constraints. The real-encoding genetic algorithm is applied to the optimal design of a parallel mechanism, which is proved the validity and advantage for the optimal design of a similar mechanism.

Abstract: The feature of the hot cracks of the welding joint of the MIG welded magnesium alloy AZ91D was studied systematically. The result indicates that the weld of the magnesium alloy displays a high cracking susceptibility. The cracks are mainly formed on the centerline of the weld and in the arc crater at the end of the weld. These cracks propagate along the α-Mg grain boundary, and they belong to the solidification cracking. These solidification cracks are resulted by the joint function of the low melting point liquid film in the weld and the tensile stress suffered by the weld metal during the solidification process. The low melting point liquid film is the internal cause to form the solidification cracks, while the tensile stress is a necessary condition. Limiting the amount of the low melting point eutectic and decreasing the tensile stress of the welding joint are two effective methods to improve the solidification cracking susceptibility of the Mg alloy weld.

Abstract: Titanium (Ti) and its alloys have been applied in orthopedics as one of the most popular biomedical metallic implant materials. In this work, to enhance the bioactivity, the surface of Ti alloy pre-modified by silane coupling agent and glutaraldehyde was covalently grafted with chitosan (CS) via biochemical multistep self-assembled method. Then, for the first time, the achieved surface was further immobilized with casein phosphopeptides (CPP), which are one group of bioactive peptides released from caseins in the digestive tract and can facilitate the calcium adsorption and usage, to form CS-CPP biocomposite coatings. The structure and composition of the fabricated coatings were characterized by X-ray photoelectron spectroscopy (XPS), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) and atomic force microscopy (AFM). As the experimental results indicated, multi-step assembly was successfully performed, and the CS and CPP were assembled onto the Ti alloy surface orderly. It is anticipated that the Ti alloys modified by CS-CPP biocomposite coatings will find potential applications as implant materials in biomedical fields.