Advanced Materials Research Vol. 968

Abstract: Biomicrofluidic silhouettes brought about scientific challenges merited to be investigated through explicit florescence observation, implicit physical-chemical analysis and intermediate conductive level manipulation. Droplet generation, as the typical biomicrofluidic phenomenon, is a complicated dynamic process. In this work, we established both linear and non-linear models to describe the biomicrofluidic droplet variation through applied mathematical techniques, in order to find the corresponding summarizations. Model analysis showed that non-linear models presented ameliorated descriptive capacity.

Abstract: For the lack of management mechanism in P2P VoD system, this paper presents design of a manageable P2P VoD system, describes the system architecture and design of each module, and been tested on CERNET2. By using intelligence node management, it has resolved the inefficient management problem of traditional P2P distribution system.

Abstract: In this paper, the major design is the jacking of bulky goods, jacking subsystem of translation system and traction cylinder in translation subsystem. The control of hydraulic system makes bulky goods reach a height, which are drawn by the traction hydraulic cylinder on anchor or sliding load car to load or unload the ship. This equipment can effectively reduce the transportation cost and it can be used to unload a variety of bulky goods.

Abstract: In order to improve the ability of students in analyzing and solving problems, improve the experimental operation skills, improve physical experiment teaching must do a good job. In electromagnetism experiment, set up comprehensive, design experiments to cultivate students' comprehensive quality and innovation ability. The reform of traditional teaching methods, making up the defects of electromagnetics experiment.

Abstract: This paper is made after the dynamic test on Jing hang Channel Bridge in Wujiang, Jiangsu Province. Based on the test on this bridge, we get dynamic characteristics of the bridge span structure. We will analysis the vibration generated from the steel and concrete box girders of the bridge while the car is running on it. Based on the different characteristics of vibration from the two kinds of girders, we can analysis the influence of this hybrid girder on driving comfort.

Abstract: In this paper, a new control theory will be proposed for the purpose of enhancing vehicle ride performance. In the first step, a quarter car model with two DOF will be analyzed after which the classical semi-active control idea and a new control method will be built. Then a new hybrid control model based on body acceleration and classical one will be provided, after which the advantage of this controller will be studied. All the models that proposed will be accomplished through matlab/simulink. The outcome parameters of two types, namely, the body acceleration and the suspension deflection will be compared in frequency domain among three conditions which can be described as passive, classical semi-active control and hybrid control respectively. Then random excitation will be given as the road input to get power spectral density curves for further compare. Though the curves we can easily come into a conclusion that vehicle suspensions armed with this new controller will show the best ride properties which hold practical values.

Abstract: Multimedia teaching and lecturing have been widely used nowadays, and then the technology of laser pointer with remote control appears in order to satisfy the requirements. The radiation power of some laser pointers is large, which may be lead to impaired eyes due to improper use. The hazard of laser radiation was analyzed. The standards, laws and regulations of the domestic and foreign were compared. Some suggestions and measures of perfecting the relative standards, strengthening consumers' education and industry rectification were provided.

Abstract: Self-lubricating bearings are the basic components of the aviation industry, and the precision forming process of bearings is one of the kernel technologies, which is urgent to be self-developed. A method called unconstrained surface directional rolling process was put forward, and then the flow chart of process optimization was designed. Based on the numerical analysis model of rolling process, Latin hypercube sampling method was used for the design-space analysis. By using BPF+NSGA-II and Kriging+PSO algorithms, the rolling process was simulated and optimized, and then the results were verified by experiments. Study shows that by the use of the new proposed process and the optimization methods, the products can get a higher quality; results of optimization and experiments are valid and consistent, comparing with BPF+NSGA-II algorithm, results of Kriging+PSO algorithm are slightly better.

Abstract: Dynamic buckling of bars under step load was studied by considering the stress wave effect. Straight bars without axial inertia were taken as an example when deformation was small. The buckling solution satisfying the boundary conditions was given by the semi-analytic method. The buckling solution was substituted to the dynamic buckling governing equations. The unified expression of dynamic buckling critical load was obtained by discussing the character of the solution. The dynamic buckling critical load was obtained by calculating the value of when the stress wave propagated to the critical length . The value of dynamic buckling load was 2.5 times the one’s of static buckling load with corresponding equivalent length.