Advanced Materials Research Vols. 179-180

Abstract: Electro-Rheological (ER) fluid is a smart material. It develops a new path for automotive semi-active intelligent suspension system. The damping force of ER damper can be controlled by applied electric field. Applying the theory of rheodynamics and hydraulic theory, a relationship of damping vs. vibration velocity, electric field strength and gas-filled pressure has been set up. There are three sections of damping force, background damping force of a fluid viscosity, electric damping force of applied electric field and pressure of gas. A new gas-filled ER damper is developed. The main structure parameter of influencing ER damper performance are discussed, some design principles of ER damper are given.

Abstract: In this paper, a new method that has shown significant potential to characterize lightning strikes damage which is couple with dynamic mechanical analysis. The composite samples used in this work are based on carbon fiber/bismaleimide system. The analysis of the dynamic mechanical data demonstrate the glass transition temperature of the composites increased as a function of increasing lightning current , simultaneity with the presence ofpotential damage, whichare result in higher network cross-link density and the incipent degradation of the polymer matrix.

Abstract: DSC test is carried out to determine the phase transformation temperatures of a NiTi SMA, which include martensitic starting temperature, martensitic finishing temperature, austenitic starting temperature and austenitic finishing temperature. The mechanical behaviors of shape memory alloy (SMA) torsion rod are investigated by using Zhou’s shear constitutive equation of SMA and the theorem of circular shaft in mechanics of materials. A critical torque equation is developed to describe the relationship between the martensitic phase transformation critical torque of SMA torsion rod and temperature.

Abstract: Differentiation of materials in optical method is significant and widely applied in engineering. The target of detection is usually not a light source, therefore, we differentiate materials of target by analyzing the information of the scattered light from the surface of the target which is lighten by given light source or natural light. The analysis of the information in the scattered light becomes the most important issue in this condition. Based on the discussion of several kinds of optical differentiation method of materials, a measuring experiment has been developed to the scattering characteristics of given materials which could be described by the modeling given in this paper. The experimental result indicates that the application of optical differentiation method of materials could be widely expanded by using suitable materials’ scattering characteristics modeling method. Relative modeling methods of material scattering characteristics and their possibility of applying in materials differentiation engineering are also be discussed.

Abstract: This document explains and demonstrates how to prepare your camera-ready manuscript for Trans Tech Publications. The best is to read these instructions and follow the outline of this text. The text area for your manuscript must be 17 cm wide and 25 cm high (6.7 and 9.8 inches, resp.). Do not place any text outside this area. Use good quality, white paper of approximately 21 x 29 cm or 8 x 11 inches (please do not change the document setting from A4 to letter). Your manuscript will be reduced by approximately 20% by the publisher. Please keep this in mind when designing your figures and tables etc.The vessel collision risk in the bridge operation period has become an acute problem that bridge engineering have to be faced, therefore, probability analysis and risk assessment about vessel-bridge collision in the bridge operation period is important. Combine with Zhoushan mainland-islands link project, using the AASHTO guide method and correction formula to calculate the probability about vessel collision with the pier 3 and to assess the risk about vessel-bridge collision of Xihoumen bridge in the operation period. The whole vessel-bridge collision risk assessment grade of Xihoumen bridge is grade two in the operation period, which is a low risk level. The operation manager need to pay attention to risk management and take preventive and control measures.

Abstract: Image scrambling is an important method to achieve images secrecy. Arnold cat transformation is widely applied, and its scrambling effect is better relatively in the classical scrambling algorithms. But it has some shortcomings of short key qualities and poor universal property. It brings forward an algorithm of image position even scrambling through improving the Arnold cat transformation. On the basis of position scrambling, the image pixel values are scrambled using chaotic map. Experimental results show that the algorithm has many advantages of increasing key qualities obviously, satisfactory effect of scrambling, and the pixel values of the image are both changed.

Abstract: Based on the characteristics of construction materials management of expressway projects, this paper analyzes the operation processes of the construction materials combined with operation management contents of all participants. Then it builds the index system of evaluation matrix, construction materials operation processes-participant. It establishes the AHP model of performance evaluation, and evaluation the performance from the three dimensions of operation phase, participants, and projects. Through the empirical study on LY expressway of Hunan Province, this paper drew up the performance evaluation conclusions which are in line with the project construction.

Abstract: A channel estimation algorithm based on superimposed training sequence is proposed in this paper. The algorithm does not need the allocation of time slot for superimposed training sequence, and it can estimate the channel coefficients without loss of bandwidth. The mean squared difference, Cramer-Rao bound and the lower bound of channel capacity are deduced based on the LS algorithm of channel estimation. It has simple structure, less computational requirement by using the LS algorithm. The result of simulation shows that the performance of system is improved to a large extent by using superimposed training sequence rather than direct training sequence, and the capacity of system is also increased.

Abstract: It has some encouraging results to use ozone in medicaments, treatments and so on. As it is usually in gas state, unstable and strong oxidability, ozone is difficult to be stored and used commonly. It is the key matter in use of ozone commonly or conveniently that the carrier material and preparation response conditions are studied to make the bond strength between ozone and carrier to be felicitous and with the proper velocity to release ozone from the ozonic compound. Ozonic compound and related single molecules were calculated to study the interaction between ozone and carrier to form ozonic compound. The carrier and ozonic compound are designed from the calculations. The stability of the ozonic compound, or the bond strength between ozone and carrier are controlled felicitously to release ozone from the ozonic compound with proper velocity. Ozone antimicrobial can be composed and used conveniently, especially for common families. There are some characteristics of ozone antimicrobial or ozone, such as universal applicability, efficiency and rapidity, security, strong penetrability, no drug resistance and sterilization and treatment simultaneity.

Abstract: With technology becoming the key factor for national economic growth, as important way for developing countries to obtain technology, international technology transfer is attached great importance to. This paper makes study on the transmission mechanism of technology spillover, technology transfer and technology gap based on Blomstrom and Nakamura’ models. The results show that the level and pace of technology transfer depends on host-country firms’ independent innovation, technology gap, and technology transfer costs. Operating in the segment market without a direct competition with multinational corporations, implementing the product differentiation strategy combing with local demand and customer-orientation, and creating effective competition environment are the inevitable paths for host-country firms to attract multinational technology transfer.