Applied Mechanics and Materials Vol. 481

Abstract: This research is introducing an enhanced tight finite key scheme for quantum key distribution (QKD) protocol to authenticate multi-party system in cloud infrastructure. The main attraction is to provide a secure channel between a cloud client to establish a connection among them by applying the theories from Von Neumann and Shannon entropies and also Shor's algorithm. By generalizing these theories we will produce enhanced tight finite key scheme for quantum key distribution (QKD) protocol to authenticate multi-party system in cloud infrastructure. Hence we are using quantum channel and also quantum key distribution (QKD) together with BB84 protocol replacing common channel to distribute the key. We are proposing an authentication of multi-party Quantum Key Distribution (MQKD) protocol using an enhanced tight finite key scheme because it will involve a number of parties in cloud infrastructure. Significant of this research is to reduce the possibility of losing a private key by producing a high efficient key rate and attack resilient.

Abstract: A method of designing onedimensional photonic crystal is presented from the perspective of Z-domain and digital signal processing. The optical structure and structural parameters for the desired filtering spectrum in reflection can be directly obtained by using the design method. A design example is given in the paper to verify the method.

Abstract: This paper investigates the effect of physical parameters of a rounded crack on the stress concentration near crack tip. The depth and radius at the crack tip are the two physical parameters concerned in this study. The finite element method was used to evaluate the stress value at the crack tip for a silicon chip with a tiny crack under tensile stress. Element type, shape and physical parameters of crack were varied to study their effect on the stress concentration near the crack. The simulation results were compared with the theoretical value, and the better physical parameters as well as the element type, element shape were discussed.

Abstract: The strained nitride capping layer (contact etch stop layer, CESL) is used as a stress booster that make transistor improvement. In this research, the n-MOSFET was simulated combining CESL tensile stressor. The stress in channel region for various part of CESL(CESL-top, CESL-lateral, CESL-bottom) were analysed and compared. The result of simulation explains how the CESL transmits the intrinsic stress to the channel. The relations between different CESL structures are discussed in this study.

Abstract: Junction point pressure changes during droplet formation in Y-junction microchannels with differed Y-angles, wetting property and capillary number of the liquid by using a three dimensional numerical simulation. The pressure of the junction point fluctuates throughout the droplet formation process, and it can be used to depict exactly and directly different stages of droplet in microchannels. And the pressure of junctions with different Y-angles of microchannel, different contact angles of dispersed phase with the surface, and different capillary numbers of continuous phase could thus be investigated via the droplet formation mechanism.

Abstract: Laser forming is an advanced process in sheet metal forming in which a laser heat source is used to shape the metal sheet. This is a new manufacturing technique that forms the metal sheet only by thermal stress. Analyses of the temperature and stress fields are very important to identify the deformation mechanism in laser forming. In this experiment, the relationship between laser irradiation position and the bending angle, in terms of laser forming, has been tested and the result was compared and analyzed with respect to the theoretical bending moment and the elastic curve differential equation.

Abstract: In this paper, a compact differential dual-frequency antenna based on metamaterial is presented. To realize the dual-frequency operation of the left-handed and zeroth-order resonant modes, a ring slot and two diagonal slots are embedded in the radiating patch, and via holes are employed to connect the patch and the ground plane. In order to improve the impedance matching of the antenna, four corners are truncated in the ground plane. The proposed antenna has a compact size of 40 mm × 40 mm, which equals to 0.25 λ₁ × 0.25 λ₁ (λ₁, the guided wavelength at f₁). The simulated results show that the proposed antenna can operate at 0.89 and 1.79 GHz bands. Meanwhile, good radiation performances are achieved.

Abstract: The influences of metal surface roughness on the shear strength and peel strength of fiber woven composites (FWC) were studied. Test results show that the metal surface roughness have an important impact on the shear strength and peel strength of FWC. Higher or lower surface roughness can reduce the adhesive strength of FWC. When the best roughness is 0.8, the maximum peel strength and shear strength of FWC are obtained, which ensure the operation reliability and enough life of the spherical plain bearing (SPB) with self-lubrication fabric liner.

Abstract: In this study, we propose an approach to compute the parasitic parameters of an surface acoustic wave (SAW) resonator, which is fabricated on 36o YX lithium tantalate substrate using standard semiconductor processes. The measured admittances of the SAW resonator are used to calculate the corresponding counter parts by applying the Kramers-Kronig relations. The parasitic parameters are then retrieved by minimizing the errors between the calculated and measured admittances.

Abstract: ive Design Xia Yang Luzhou Vocational and Technical College, Luzhou, Sichuan, 646005, China zhuqinyang2011@126.com Keywords: Machinery; Abstraction; Design; Core Theory; Analysis. Abstract. The theory of mechanical abstractive design is the newest mechanical design concept at present. Lots of software achieve a certain degree of intelligence with the development of computer technology. And the processing efficiency is improved to a great deal through intelligent processing. Many suggestions for reference can be proposed during the processing. The study is based on the concept and characteristics of mechanical design. And the core theory of mechanical abstractive design, such as intelligence, automatic modeling and relative abstraction, was analyzed combined with the implication of abstractive design. Thus, a certain degree of reference is hopefully provided for the pragmatic design work.